Merge branch 'boxcar_fm' into boxcar

Adding support for STM32F767 boxcar branch

.gitignore

@@ -1,3 +1,5 @@
-.pio
-.vscode
-
+*.o
+obj/
+bin/
+GitVersion.h
+build/

.gitmodules

@@ -0,0 +1,9 @@
+[submodule "STM32F4XX_Lib"]
+	path = STM32F4XX_Lib
+	url = https://github.com/juribeparada/STM32F4XX_Lib.git
+[submodule "STM32F7XX_Lib"]
+	path = STM32F7XX_Lib
+	url = https://github.com/juribeparada/STM32F7XX_Lib.git
+[submodule "STM32F10X_Lib"]
+	path = STM32F10X_Lib
+	url = https://github.com/shawnchain/STM32F10X_Lib.git

BUILD.txt

@@ -0,0 +1,125 @@
+In order to build MMDVM, you need to tell the Arduino GUI to link with the
+CMSIS DSP library, which is doesn't do by default.
+
+My development is on Windows and so I can vouch for the following instructions.
+
+For Arduino 1.6.3 with SAM 1.6.4
+--------------------------------
+
+1. Go to the where the platform.txt file is located. On my Windows machine it's
+in:
+
+C:\Users\Jonathan\AppData\Roaming\Arduino15\packages\arduino\hardware\sam\1.6.4
+
+On Mac OS X it's located in:
+
+/Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/sam
+Or
+~/Library/Arduino15/packages/arduino/hardware/sam/1.6.6
+
+2. You'll need to open the file in a text editor and find the line:
+
+## Combine gc-sections, archives, and objects
+recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" {compiler.c.elf.flags} -mcpu={build.mcu} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--warn-unresolved-symbols -Wl,--start-group "{build.path}/syscalls_sam3.c.o" {object_files} "{build.variant.path}/{build.variant_system_lib}" "{build.path}/{archive_file}" -Wl,--end-group -lm -gcc
+
+In my version it's line 73.
+
+3. Modify it to read as follows:
+
+## Combine gc-sections, archives, and objects
+recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" {compiler.c.elf.flags} -mcpu={build.mcu} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--warn-unresolved-symbols -Wl,--start-group "{build.path}/syscalls_sam3.c.o" {object_files} "{build.variant.path}/{build.variant_system_lib}" "{build.system.path}/CMSIS/CMSIS/Lib/ARM/arm_cortexM3l_math.lib" "{build.path}/{archive_file}" -Wl,--end-group -lm -gcc
+
+The change is near the end, and is the addition of:
+
+"{build.system.path}/CMSIS/CMSIS/Lib/ARM/arm_cortexM3l_math.lib"
+
+Which is the CMSIS AMR3 DSP library for little-endian operation.
+
+4. Save the file and start up the Arduino GUI and build MMDVM.
+
+I would like to get instructions for doing the same on a Linux platform. As a
+starter find the relevent platform.txt and try adding:
+
+"{build.system.path}/CMSIS/CMSIS/Lib/ARM/libarm_cortexM3l_math.a"
+
+or maybe:
+
+"{build.variant.path}/libarm_cortexM3l_math.a"
+
+Likely on Linux
+
+"{build.system.path}/CMSIS/CMSIS/Lib/GCC/libarm_cortexM3l_math.a"
+
+As with Arduino 1.6.7 with SAM 1.6.6, see below.
+
+
+For Arduino 1.6.7 with SAM 1.6.6 
+--------------------------------
+(checked OK on Arduino 1.6.11 and SAM 1.6.9)
+
+1. Go to the where the platform.txt file is located. On my Windows machine it's
+in:
+
+C:\Users\Jonathan\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.6
+
+On Mac OS X it's located in:
+
+/Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/sam
+
+On Linux, it's located in my home directory, downloaded and extracted from Arduino website, but must be installed.
+
+/home/m1geo/arduino-1.6.7/hardware/arduino/sam 
+
+or
+
+/home/m1geo/.arduino15/packages/arduino/hardware/sam/1.6.9 (if you let the board/library manager install SAM)
+
+
+I (M1GEO) found it was necessary to download SAM-1.6.6 outside of the Arduino IDE, and manually extract the files. 
+  The Board Manager didn't seem to install the SAM files correctly. Here's how I did it:
+  
+  a) wget http://downloads.arduino.cc/cores/sam-1.6.6.tar.bz2 -O /tmp/sam-1.6.6.tar.bz2 (download and save in /tmp)
+  b) cd arduino-1.6.7/hardware/arduino/ (Arduino root, here, in my home directory)
+  c) tar xvfj /tmp/sam-1.6.6.tar.bz2
+
+2. You'll need to open the file (platform.txt) in a text editor and find the line:
+
+## Combine gc-sections, archives, and objects
+recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" -mcpu={build.mcu} -mthumb {compiler.c.elf.flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--start-group "{build.path}/core/syscalls_sam3.c.o" {object_files} "{build.variant.path}/{build.variant_system_lib}" "{build.path}/{archive_file}" -Wl,--end-group -lm -gcc
+
+In my version it's line 73.
+
+3. Modify it to read as follows:
+
+## Combine gc-sections, archives, and objects
+recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" -mcpu={build.mcu} -mthumb {compiler.c.elf.flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--start-group "{build.path}/core/syscalls_sam3.c.o" {object_files} "{build.variant.path}/{build.variant_system_lib}" "{build.system.path}/CMSIS/CMSIS/Lib/ARM/arm_cortexM3l_math.lib" "{build.path}/{archive_file}" -Wl,--end-group -lm -gcc
+
+The change is near the end, and is the addition of:
+
+"{build.system.path}/CMSIS/CMSIS/Lib/ARM/arm_cortexM3l_math.lib"
+
+On Linux, the path was found to differ slightly (GCC instead of ARM):
+
+"{build.system.path}/CMSIS/CMSIS/Lib/GCC/libarm_cortexM3l_math.a"
+
+Which is the CMSIS AMR3 DSP library for little-endian operation.
+
+4. Save the file and start up the Arduino GUI and build MMDVM.
+
+For Arduino 1.6.9 with SAM 1.6.8
+--------------------------------
+
+1. Locate platform.txt. On Ubuntu 14.04 LTS x86_64 OS it is in:
+
+/home/$user/.arduino15/packages/arduino/hardware/sam/1.6.8/
+
+2. Open the file in a text editor and change the line:
+
+## Combine gc-sections, archives, and objects
+recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" -mcpu={build.mcu} -mthumb {compiler.c.elf.flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--start-group {compiler.combine.flags} {object_files} "{build.variant.path}/{build.variant_system_lib}" "{build.path}/{archive_file}" -Wl,--end-group -lm -gcc
+
+to
+
+recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" -mcpu={build.mcu} -mthumb {compiler.c.elf.flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--start-group {compiler.combine.flags} {object_files} "{build.variant.path}/{build.variant_system_lib}" "{build.system.path}/CMSIS/CMSIS/Lib/GCC/libarm_cortexM3l_math.a" "{build.path}/{archive_file}" -Wl,--end-group -lm -gcc
+
+3. Save the file, open the Arduino IDE and build MMDVM

CWIdTX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -125,7 +125,7 @@ void CCWIdTX::process()
   }
 }
 
-uint8_t CCWIdTX::write(const uint8_t* data, uint16_t length)
+uint8_t CCWIdTX::write(const uint8_t* data, uint8_t length)
 {
   ::memset(m_poBuffer, 0x00U, 1000U * sizeof(uint8_t));
 

CWIdTX.h

@@ -1,6 +1,6 @@
 /*
  *   Copyright (C) 2009-2015 by Jonathan Naylor G4KLX
- *   Copyright (C) 2016,2020 by Colin Durbridge G4EML
+ *   Copyright (C) 2016 by Colin Durbridge G4EML
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -28,7 +28,7 @@ public:
 
   void process();
 
-  uint8_t write(const uint8_t* data, uint16_t length);
+  uint8_t write(const uint8_t* data, uint8_t length);
 
   void reset();
 

CalDMR.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2015,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2015 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -18,9 +18,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DMR)
-
 #include "Globals.h"
 #include "CalDMR.h"
 
@@ -211,7 +208,7 @@ void CCalDMR::dmrdmo1k()
   }
 }
 
-uint8_t CCalDMR::write(const uint8_t* data, uint16_t length)
+uint8_t CCalDMR::write(const uint8_t* data, uint8_t length)
 {
   if (length != 1U)
     return 4U;
@@ -224,5 +221,3 @@ uint8_t CCalDMR::write(const uint8_t* data, uint16_t length)
   return 0U;
 }
 
-#endif
-

CalDMR.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2015,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2015 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -17,13 +17,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DMR)
-
 #if !defined(CALDMR_H)
 #define  CALDMR_H
 
+#include "Config.h"
 #include "DMRDefines.h"
 
 enum DMRCAL1K {
@@ -44,7 +41,7 @@ public:
   void createData1k(uint8_t n);
   void createDataDMO1k(uint8_t n);
 
-  uint8_t write(const uint8_t* data, uint16_t length);
+  uint8_t write(const uint8_t* data, uint8_t length);
 
 private:
   bool      m_transmit;
@@ -56,5 +53,3 @@ private:
 
 #endif
 
-#endif
-

CalDStarRX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2016,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2016 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DSTAR)
-
 #include "Globals.h"
 #include "CalDStarRX.h"
 #include "Utils.h"
@@ -27,7 +24,7 @@
 const unsigned int BUFFER_LENGTH = 200U;
 
 const uint32_t PLLMAX = 0x10000U;
-const uint32_t PLLINC = PLLMAX / DSTAR_RADIO_SYMBOL_LENGTH;
+const uint32_t PLLINC = PLLMAX / DSTAR_RADIO_BIT_LENGTH;
 const uint32_t INC    = PLLINC / 32U;
 
 // D-Star bit order version of 0x55 0x2D 0x16
@@ -129,5 +126,3 @@ void CCalDStarRX::process(q15_t value)
   }
 }
 
-#endif
-

CalDStarRX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,13 +16,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DSTAR)
-
 #if !defined(CALDSTARRX_H)
 #define  CALDSTARRX_H
 
+#include "Config.h"
 #include "DStarDefines.h"
 
 class CCalDStarRX {
@@ -43,5 +40,3 @@ private:
 
 #endif
 
-#endif
-

CalDStarTX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2016,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2016 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DSTAR)
-
 #include "Globals.h"
 #include "CalDStarTX.h"
 
@@ -165,7 +162,7 @@ void CCalDStarTX::process()
   m_count = (m_count + 1U) % (30U * 21U);
 }
 
-uint8_t CCalDStarTX::write(const uint8_t* data, uint16_t length)
+uint8_t CCalDStarTX::write(const uint8_t* data, uint8_t length)
 {
   if (length != 1U)
     return 4U;
@@ -184,5 +181,3 @@ uint8_t CCalDStarTX::write(const uint8_t* data, uint16_t length)
   return 0U;
 }
 
-#endif
-

CalDStarTX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,20 +16,17 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DSTAR)
-
 #if !defined(CALDSTARTX_H)
 #define  CALDSTARTX_H
 
+#include "Config.h"
 #include "DStarDefines.h"
 
 class CCalDStarTX {
 public:
   CCalDStarTX();
 
-  uint8_t write(const uint8_t* data, uint16_t length);
+  uint8_t write(const uint8_t* data, uint8_t length);
 
   void process();
 
@@ -40,5 +37,3 @@ private:
 
 #endif
 
-#endif
-

CalFM.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2015,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2015 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *   Copyright (C) 2020 by Phil Taylor M0VSE
  *
@@ -19,9 +19,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_FM)
-
 #include "Globals.h"
 #include "CalFM.h"
 
@@ -55,7 +52,7 @@ void CCalFM::process()
 {
   const TONE_TABLE* entry = NULL;
 
-  if (m_modemState != m_lastState)
+  if (m_modemState!=m_lastState)
   {
     switch (m_modemState) {
         case STATE_FMCAL10K:
@@ -119,7 +116,7 @@ void CCalFM::process()
 }
 
 
-uint8_t CCalFM::write(const uint8_t* data, uint16_t length)
+uint8_t CCalFM::write(const uint8_t* data, uint8_t length)
 {
   if (length != 1U)
     return 4U;
@@ -128,6 +125,3 @@ uint8_t CCalFM::write(const uint8_t* data, uint16_t length)
 
   return 0U;
 }
-
-#endif
-

CalFM.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2015,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2015 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *   Copyright (C) 2020 by Phil Taylor M0VSE
  *
@@ -18,13 +18,11 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
 #if !defined(CALFM_H)
 #define  CALFM_H
 
+#include "Config.h"
+
 class CCalFM {
 public:
   CCalFM();
@@ -37,7 +35,7 @@ public:
   void fm25kcal();
   void fm30kcal();
 
-  uint8_t write(const uint8_t* data, uint16_t length);
+  uint8_t write(const uint8_t* data, uint8_t length);
 
 private:
   uint16_t  m_frequency;
@@ -51,5 +49,3 @@ private:
 
 #endif
 
-#endif
-

CalNXDN.cpp

@@ -1,6 +1,5 @@
 /*
  *   Copyright (C) 2018 by Andy Uribe CA6JAU
- *   Copyright (C) 2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -18,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_NXDN)
-
 #include "Globals.h"
 #include "CalNXDN.h"
 
@@ -83,7 +79,7 @@ void CCalNXDN::process()
   }
 }
 
-uint8_t CCalNXDN::write(const uint8_t* data, uint16_t length)
+uint8_t CCalNXDN::write(const uint8_t* data, uint8_t length)
 {
   if (length != 1U)
     return 4U;
@@ -96,5 +92,3 @@ uint8_t CCalNXDN::write(const uint8_t* data, uint16_t length)
   return 0U;
 }
 
-#endif
-

CalNXDN.h

@@ -1,6 +1,5 @@
 /*
  *   Copyright (C) 2018 by Andy Uribe CA6JAU
- *   Copyright (C) 2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,13 +16,11 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_NXDN)
-
 #if !defined(CALNXDN_H)
 #define  CALNXDN_H
 
+#include "Config.h"
+
 enum NXDNCAL1K {
   NXDNCAL1K_IDLE,
   NXDNCAL1K_TX
@@ -35,7 +32,7 @@ public:
 
   void process();
 
-  uint8_t write(const uint8_t* data, uint16_t length);
+  uint8_t write(const uint8_t* data, uint8_t length);
 
 private:
   bool      m_transmit;
@@ -45,5 +42,3 @@ private:
 
 #endif
 
-#endif
-

CalP25.cpp

@@ -1,6 +1,5 @@
 /*
  *   Copyright (C) 2018 by Andy Uribe CA6JAU
- *   Copyright (C) 2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -18,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_P25)
-
 #include "Globals.h"
 #include "CalP25.h"
 
@@ -86,7 +82,7 @@ void CCalP25::process()
   }
 }
 
-uint8_t CCalP25::write(const uint8_t* data, uint16_t length)
+uint8_t CCalP25::write(const uint8_t* data, uint8_t length)
 {
   if (length != 1U)
     return 4U;
@@ -99,5 +95,3 @@ uint8_t CCalP25::write(const uint8_t* data, uint16_t length)
   return 0U;
 }
 
-#endif
-

CalP25.h

@@ -1,6 +1,5 @@
 /*
  *   Copyright (C) 2018 by Andy Uribe CA6JAU
- *   Copyright (C) 2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,13 +16,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_P25)
-
 #if !defined(CALP25_H)
 #define  CALP25_H
 
+#include "Config.h"
 #include "P25Defines.h"
 
 enum P25CAL1K {
@@ -38,7 +34,7 @@ public:
 
   void process();
 
-  uint8_t write(const uint8_t* data, uint16_t length);
+  uint8_t write(const uint8_t* data, uint8_t length);
 
 private:
   bool      m_transmit;
@@ -47,5 +43,3 @@ private:
 
 #endif
 
-#endif
-

CalPOCSAG.cpp

@@ -1,6 +1,5 @@
 /*
  *   Copyright (C) 2019 by Florian Wolters DF2ET
- *   Copyright (C) 2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -18,12 +17,10 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_POCSAG)
-
 #include "Globals.h"
 #include "CalPOCSAG.h"
 
+
 CCalPOCSAG::CCalPOCSAG() :
 m_state(POCSAGCAL_IDLE)
 {
@@ -41,7 +38,7 @@ void CCalPOCSAG::process()
   pocsagTX.writeByte(0xAAU);
 }
 
-uint8_t CCalPOCSAG::write(const uint8_t* data, uint16_t length)
+uint8_t CCalPOCSAG::write(const uint8_t* data, uint8_t length)
 {
   if (length != 1U)
     return 4U;
@@ -50,6 +47,3 @@ uint8_t CCalPOCSAG::write(const uint8_t* data, uint16_t length)
 
   return 0U;
 }
-
-#endif
-

CalPOCSAG.h

@@ -1,6 +1,5 @@
 /*
  *   Copyright (C) 2019 by Florian Wolters DF2ET
- *   Copyright (C) 2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,13 +16,11 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_POCSAG)
-
 #if !defined(CALPOCSAG_H)
 #define  CALPOCSAG_H
 
+#include "Config.h"
+
 enum POCSAGCAL {
   POCSAGCAL_IDLE,
   POCSAGCAL_TX
@@ -35,13 +32,10 @@ public:
 
   void process();
 
-  uint8_t write(const uint8_t* data, uint16_t length);
+  uint8_t write(const uint8_t* data, uint8_t length);
 
 private:
   POCSAGCAL m_state;
 };
 
 #endif
-
-#endif
-

Config.h

@@ -0,0 +1,90 @@
+/*
+ *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if !defined(CONFIG_H)
+#define  CONFIG_H
+
+// Allow for the use of high quality external clock oscillators
+// The number is the frequency of the oscillator in Hertz.
+//
+// The frequency of the TCXO must be an integer multiple of 48000.
+// Frequencies such as 12.0 Mhz (48000 * 250) and 14.4 Mhz (48000 * 300) are suitable.
+// Frequencies such as 10.0 Mhz (48000 * 208.333) or 20 Mhz (48000 * 416.666) are not suitable.
+//
+// For 12 MHz
+#define EXTERNAL_OSC 12000000
+// For 12.288 MHz
+// #define EXTERNAL_OSC 12288000
+// For 14.4 MHz
+// #define EXTERNAL_OSC 14400000
+// For 19.2 MHz
+// #define EXTERNAL_OSC 19200000
+
+// Allow the use of the COS line to lockout the modem
+// #define USE_COS_AS_LOCKOUT
+
+// Use pins to output the current mode via LEDs
+// #define MODE_LEDS
+
+// For the original Arduino Due pin layout
+// #define ARDUINO_DUE_PAPA
+
+#if defined(STM32F1)
+// For the SQ6POG board
+#define STM32F1_POG
+#else
+// For the ZUM V1.0 and V1.0.1 boards pin layout
+#define ARDUINO_DUE_ZUM_V10
+#endif
+
+// For the SP8NTH board
+// #define ARDUINO_DUE_NTH
+
+// For ST Nucleo-64 STM32F446RE board
+// #define STM32F4_NUCLEO_MORPHO_HEADER
+// #define STM32F4_NUCLEO_ARDUINO_HEADER
+
+// Use separate mode pins to switch external channel/filters/bandwidth for example
+// #define MODE_PINS
+
+// For the VK6MST Pi3 Shield communicating over i2c. i2c address & speed defined in i2cTeensy.cpp
+// #define VK6MST_TEENSY_PI3_SHIELD_I2C
+
+// Pass RSSI information to the host
+// #define SEND_RSSI_DATA
+
+// Use the modem as a serial repeater for Nextion displays
+// #define SERIAL_REPEATER
+
+// To reduce CPU load, you can remove the DC blocker by commenting out the next line
+#define USE_DCBLOCKER
+
+// Constant Service LED once repeater is running 
+// Do not use if employing an external hardware watchdog 
+// #define CONSTANT_SRV_LED
+
+// Use the YSF and P25 LEDs for NXDN
+// #define USE_ALTERNATE_NXDN_LEDS
+
+// Use the D-Star and DMR LEDs for POCSAG
+// #define USE_ALTERNATE_POCSAG_LEDS
+
+// Use the D-Star and YSF LEDs for FM
+#define USE_ALTERNATE_FM_LEDS
+
+#endif

DMRDMORX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DMR)
-
 #include "Globals.h"
 #include "DMRDMORX.h"
 #include "DMRSlotType.h"
@@ -426,6 +423,3 @@ void CDMRDMORX::writeRSSIData(uint8_t* frame)
   serial.writeDMRData(true, frame, DMR_FRAME_LENGTH_BYTES + 1U);
 #endif
 }
-
-#endif
-

DMRDMORX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,13 +16,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DMR)
-
 #if !defined(DMRDMORX_H)
 #define  DMRDMORX_H
 
+#include "Config.h"
 #include "DMRDefines.h"
 
 const uint16_t DMO_BUFFER_LENGTH_SAMPLES = 1440U;   // 60ms at 24 kHz
@@ -70,6 +67,3 @@ private:
 };
 
 #endif
-
-#endif
-

DMRDMOTX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *   Copyright (C) 2017 by Andy Uribe CA6JAU
  *
@@ -19,9 +19,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DMR)
-
 #include "Globals.h"
 #include "DMRSlotType.h"
 
@@ -77,7 +74,7 @@ void CDMRDMOTX::process()
       m_poLen = m_txDelay;
     } else {
       for (unsigned int i = 0U; i < DMR_FRAME_LENGTH_BYTES; i++)
-        m_fifo.get(m_poBuffer[i]);
+        m_poBuffer[i] = m_fifo.get();
 
       for (unsigned int i = 0U; i < 39U; i++)
         m_poBuffer[i + DMR_FRAME_LENGTH_BYTES] = PR_FILL[i];
@@ -107,7 +104,7 @@ void CDMRDMOTX::process()
   }
 }
 
-uint8_t CDMRDMOTX::writeData(const uint8_t* data, uint16_t length)
+uint8_t CDMRDMOTX::writeData(const uint8_t* data, uint8_t length)
 {
   if (length != (DMR_FRAME_LENGTH_BYTES + 1U))
     return 4U;
@@ -164,5 +161,3 @@ void CDMRDMOTX::setTXDelay(uint8_t delay)
     m_txDelay = 1200U;
 }
 
-#endif
-

DMRDMOTX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -17,22 +17,19 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DMR)
-
 #if !defined(DMRDMOTX_H)
 #define  DMRDMOTX_H
 
+#include "Config.h"
 #include "DMRDefines.h"
 
-#include "RingBuffer.h"
+#include "SerialRB.h"
 
 class CDMRDMOTX {
 public:
   CDMRDMOTX();
 
-  uint8_t writeData(const uint8_t* data, uint16_t length);
+  uint8_t writeData(const uint8_t* data, uint8_t length);
 
   void process();
 
@@ -41,7 +38,7 @@ public:
   uint8_t getSpace() const;
 
 private:
-  CRingBuffer<uint8_t>                        m_fifo;
+  CSerialRB                        m_fifo;
   arm_fir_interpolate_instance_q15 m_modFilter;
   q15_t                            m_modState[16U];    // blockSize + phaseLength - 1, 4 + 9 - 1 plus some spare
   uint8_t                          m_poBuffer[1200U];
@@ -54,5 +51,3 @@ private:
 
 #endif
 
-#endif
-

DMRIdleRX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DMR)
-
 #include "Globals.h"
 #include "DMRIdleRX.h"
 #include "DMRSlotType.h"
@@ -212,6 +209,3 @@ void CDMRIdleRX::setColorCode(uint8_t colorCode)
 {
   m_colorCode = colorCode;
 }
-
-#endif
-

DMRIdleRX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,13 +16,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DMR)
-
 #if !defined(DMRIDLERX_H)
 #define  DMRIDLERX_H
 
+#include "Config.h"
 #include "DMRDefines.h"
 
 class CDMRIdleRX {
@@ -52,5 +49,3 @@ private:
 
 #endif
 
-#endif
-

DMRRX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DMR)
-
 #include "Globals.h"
 #include "DMRRX.h"
 
@@ -71,5 +68,3 @@ void CDMRRX::reset()
   m_slot2RX.reset();
 }
 
-#endif
-

DMRRX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,13 +16,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DMR)
-
 #if !defined(DMRRX_H)
 #define  DMRRX_H
 
+#include "Config.h"
 #include "DMRSlotRX.h"
 
 class CDMRRX {
@@ -43,5 +40,3 @@ private:
 
 #endif
 
-#endif
-

DMRSlotRX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DMR)
-
 #include "Globals.h"
 #include "DMRSlotRX.h"
 #include "DMRSlotType.h"
@@ -403,6 +400,3 @@ void CDMRSlotRX::writeRSSIData(uint8_t* frame)
   serial.writeDMRData(m_slot, frame, DMR_FRAME_LENGTH_BYTES + 1U);
 #endif
 }
-
-#endif
-

DMRSlotRX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,13 +16,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DMR)
-
 #if !defined(DMRSLOTRX_H)
 #define  DMRSLOTRX_H
 
+#include "Config.h"
 #include "DMRDefines.h"
 
 enum DMRRX_STATE {
@@ -73,6 +70,3 @@ private:
 };
 
 #endif
-
-#endif
-

DMRSlotType.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DMR)
-
 #include "Globals.h"
 #include "DMRSlotType.h"
 
@@ -288,5 +285,3 @@ void CDMRSlotType::encode(uint8_t colorCode, uint8_t dataType, uint8_t* frame) c
   frame[20U] = (frame[20U] & 0x03U) | ((slotType[1U] << 6) & 0xC0U) | ((slotType[2U] >> 2) & 0x3CU);
 }
 
-#endif
-

DMRSlotType.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,10 +16,6 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DMR)
-
 #if !defined(DMRSLOTTYPE_H)
 #define  DMRSLOTTYPE_H
 
@@ -39,5 +35,3 @@ private:
 
 #endif
 
-#endif
-

DMRTX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *   Copyright (C) 2017 by Andy Uribe CA6JAU
  *
@@ -19,9 +19,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DMR)
-
 #include "Globals.h"
 #include "DMRSlotType.h"
 
@@ -147,7 +144,7 @@ void CDMRTX::process()
   }
 }
 
-uint8_t CDMRTX::writeData1(const uint8_t* data, uint16_t length)
+uint8_t CDMRTX::writeData1(const uint8_t* data, uint8_t length)
 {
   if (length != (DMR_FRAME_LENGTH_BYTES + 1U))
     return 4U;
@@ -171,7 +168,7 @@ uint8_t CDMRTX::writeData1(const uint8_t* data, uint16_t length)
   return 0U;
 }
 
-uint8_t CDMRTX::writeData2(const uint8_t* data, uint16_t length)
+uint8_t CDMRTX::writeData2(const uint8_t* data, uint8_t length)
 {
   if (length != (DMR_FRAME_LENGTH_BYTES + 1U))
     return 4U;
@@ -195,7 +192,7 @@ uint8_t CDMRTX::writeData2(const uint8_t* data, uint16_t length)
   return 0U;
 }
 
-uint8_t CDMRTX::writeShortLC(const uint8_t* data, uint16_t length)
+uint8_t CDMRTX::writeShortLC(const uint8_t* data, uint8_t length)
 {
   if (length != 9U)
     return 4U;
@@ -211,7 +208,7 @@ uint8_t CDMRTX::writeShortLC(const uint8_t* data, uint16_t length)
   return 0U;
 }
 
-uint8_t CDMRTX::writeAbort(const uint8_t* data, uint16_t length)
+uint8_t CDMRTX::writeAbort(const uint8_t* data, uint8_t length)
 {
   if (length != 1U)
     return 4U;
@@ -296,7 +293,7 @@ void CDMRTX::createData(uint8_t slotIndex)
 {
   if (m_fifo[slotIndex].getData() >= DMR_FRAME_LENGTH_BYTES && m_frameCount >= STARTUP_COUNT && m_abortCount[slotIndex] >= ABORT_COUNT) {
     for (unsigned int i = 0U; i < DMR_FRAME_LENGTH_BYTES; i++) {
-      m_fifo[slotIndex].get(m_poBuffer[i]);
+      m_poBuffer[i]   = m_fifo[slotIndex].get();
       m_markBuffer[i] = MARK_NONE;
     }
   } else {
@@ -417,6 +414,3 @@ uint32_t CDMRTX::getFrameCount()
 {
   return m_frameCount;
 }
-
-#endif
-

DMRTX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -17,16 +17,13 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DMR)
-
 #if !defined(DMRTX_H)
 #define  DMRTX_H
 
+#include "Config.h"
 #include "DMRDefines.h"
 
-#include "RingBuffer.h"
+#include "SerialRB.h"
 
 enum DMRTXSTATE {
   DMRTXSTATE_IDLE,
@@ -41,11 +38,11 @@ class CDMRTX {
 public:
   CDMRTX();
 
-  uint8_t writeData1(const uint8_t* data, uint16_t length);
-  uint8_t writeData2(const uint8_t* data, uint16_t length);
+  uint8_t writeData1(const uint8_t* data, uint8_t length);
+  uint8_t writeData2(const uint8_t* data, uint8_t length);
 
-  uint8_t writeShortLC(const uint8_t* data, uint16_t length);
-  uint8_t writeAbort(const uint8_t* data, uint16_t length);
+  uint8_t writeShortLC(const uint8_t* data, uint8_t length);
+  uint8_t writeAbort(const uint8_t* data, uint8_t length);
 
   void setStart(bool start);
   void setCal(bool start);
@@ -62,7 +59,7 @@ public:
   void setColorCode(uint8_t colorCode);
 
 private:
-  CRingBuffer<uint8_t>                        m_fifo[2U];
+  CSerialRB                        m_fifo[2U];
   arm_fir_interpolate_instance_q15 m_modFilter;
   q15_t                            m_modState[16U];    // blockSize + phaseLength - 1, 4 + 9 - 1 plus some spare
   DMRTXSTATE                       m_state;
@@ -86,5 +83,3 @@ private:
 
 #endif
 
-#endif
-

DStarDefines.h

@@ -0,0 +1,48 @@
+/*
+ *   Copyright (C) 2009-2015 by Jonathan Naylor G4KLX
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if !defined(DSTARDEFINES_H)
+#define  DSTARDEFINES_H
+
+const unsigned int DSTAR_RADIO_BIT_LENGTH = 5U;      // At 24 kHz sample rate
+
+const unsigned int DSTAR_HEADER_LENGTH_BYTES = 41U;
+const unsigned int DSTAR_HEADER_LENGTH_BITS  = DSTAR_HEADER_LENGTH_BYTES * 8U;
+
+const unsigned int DSTAR_FEC_SECTION_LENGTH_BYTES = 83U;
+const unsigned int DSTAR_FEC_SECTION_LENGTH_BITS  = 660U;
+
+const unsigned int DSTAR_DATA_LENGTH_BYTES = 12U;
+const unsigned int DSTAR_DATA_LENGTH_BITS  = DSTAR_DATA_LENGTH_BYTES * 8U;
+
+const uint8_t      DSTAR_EOT_BYTES[] = {0x55, 0x55, 0x55, 0x55, 0xC8, 0x7A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+const unsigned int DSTAR_EOT_LENGTH_BYTES = 6U;
+const unsigned int DSTAR_EOT_LENGTH_BITS  = DSTAR_EOT_LENGTH_BYTES * 8U;
+
+const uint8_t      DSTAR_DATA_SYNC_LENGTH_BYTES = 3U;
+const uint8_t      DSTAR_DATA_SYNC_LENGTH_BITS  = DSTAR_DATA_SYNC_LENGTH_BYTES * 8U;
+
+const uint8_t      DSTAR_DATA_SYNC_BYTES[] = {0x9E, 0x8D, 0x32, 0x88, 0x26, 0x1A, 0x3F, 0x61, 0xE8, 0x55, 0x2D, 0x16};
+
+const uint8_t      DSTAR_SLOW_DATA_TYPE_TEXT   = 0x40U;
+const uint8_t      DSTAR_SLOW_DATA_TYPE_HEADER = 0x50U;
+
+const uint8_t      DSTAR_SCRAMBLER_BYTES[] = {0x70U, 0x4FU, 0x93U};
+
+#endif
+

DStarRX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2017 by Andy Uribe CA6JAU
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -18,28 +18,31 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DSTAR)
-
 #include "Globals.h"
 #include "DStarRX.h"
 #include "Utils.h"
 
-const unsigned int MAX_FRAMES = 150U;
+const unsigned int BUFFER_LENGTH = 200U;
+
+const uint32_t PLLMAX = 0x10000U;
+const uint32_t PLLINC = PLLMAX / DSTAR_RADIO_BIT_LENGTH;
+const uint32_t INC    = PLLINC / 32U;
+
+const unsigned int MAX_SYNC_BITS = 100U * DSTAR_DATA_LENGTH_BITS;
 
 // D-Star bit order version of 0x55 0x55 0x6E 0x0A
-const uint64_t FRAME_SYNC_DATA = 0x0000000000557650U;
-const uint64_t FRAME_SYNC_MASK = 0x0000000000FFFFFFU;
+const uint32_t FRAME_SYNC_DATA = 0x00557650U;
+const uint32_t FRAME_SYNC_MASK = 0x00FFFFFFU;
 const uint8_t  FRAME_SYNC_ERRS = 2U;
 
 // D-Star bit order version of 0x55 0x2D 0x16
-const uint64_t DATA_SYNC_DATA = 0x0000000000AAB468U;
-const uint64_t DATA_SYNC_MASK = 0x0000000000FFFFFFU;
+const uint32_t DATA_SYNC_DATA = 0x00AAB468U;
+const uint32_t DATA_SYNC_MASK = 0x00FFFFFFU;
 const uint8_t  DATA_SYNC_ERRS = 2U;
 
 // D-Star bit order version of 0x55 0x55 0xC8 0x7A
-const uint64_t END_SYNC_DATA = 0x0000AAAAAAAA135EU;
-const uint64_t END_SYNC_MASK = 0x0000FFFFFFFFFFFFU;
+const uint32_t END_SYNC_DATA = 0xAAAA135EU;
+const uint32_t END_SYNC_MASK = 0xFFFFFFFFU;
 const uint8_t  END_SYNC_ERRS = 1U;
 
 const uint8_t BIT_MASK_TABLE0[] = {0x7FU, 0xBFU, 0xDFU, 0xEFU, 0xF7U, 0xFBU, 0xFDU, 0xFEU};
@@ -234,24 +237,14 @@ const uint16_t CCITT_TABLE[] = {
   0xf78fU, 0xe606U, 0xd49dU, 0xc514U, 0xb1abU, 0xa022U, 0x92b9U, 0x8330U,
   0x7bc7U, 0x6a4eU, 0x58d5U, 0x495cU, 0x3de3U, 0x2c6aU, 0x1ef1U, 0x0f78U};
 
-const uint16_t NOENDPTR = 9999U;
-
 CDStarRX::CDStarRX() :
+m_pll(0U),
+m_prev(false),
 m_rxState(DSRXS_NONE),
-m_bitBuffer(),
-m_headerBuffer(),
-m_dataBuffer(),
-m_bitPtr(0U),
-m_headerPtr(0U),
-m_dataPtr(0U),
-m_startPtr(NOENDPTR),
-m_syncPtr(NOENDPTR),
-m_minSyncPtr(NOENDPTR),
-m_maxSyncPtr(NOENDPTR),
-m_maxFrameCorr(0),
-m_maxDataCorr(0),
-m_frameCount(0U),
-m_countdown(0U),
+m_patternBuffer(0x00U),
+m_rxBuffer(),
+m_rxBufferBits(0U),
+m_dataBits(0U),
 m_mar(0U),
 m_pathMetric(),
 m_pathMemory0(),
@@ -266,20 +259,14 @@ m_rssiCount(0U)
 
 void CDStarRX::reset()
 {
-  m_rxState      = DSRXS_NONE;
-  m_headerPtr    = 0U;
-  m_dataPtr      = 0U;
-  m_bitPtr       = 0U;
-  m_maxFrameCorr = 0;
-  m_maxDataCorr  = 0;
-  m_startPtr     = NOENDPTR;
-  m_syncPtr      = NOENDPTR;
-  m_minSyncPtr   = NOENDPTR;
-  m_maxSyncPtr   = NOENDPTR;
-  m_frameCount   = 0U;
-  m_countdown    = 0U;
-  m_rssiAccum    = 0U;
-  m_rssiCount    = 0U;
+  m_pll           = 0U;
+  m_prev          = false;
+  m_rxState       = DSRXS_NONE;
+  m_patternBuffer = 0x00U;
+  m_rxBufferBits  = 0U;
+  m_dataBits      = 0U;
+  m_rssiAccum     = 0U;
+  m_rssiCount     = 0U;
 }
 
 void CDStarRX::samples(const q15_t* samples, const uint16_t* rssi, uint8_t length)
@@ -288,117 +275,125 @@ void CDStarRX::samples(const q15_t* samples, const uint16_t* rssi, uint8_t lengt
     m_rssiAccum += rssi[i];
     m_rssiCount++;
 
-    q15_t sample = samples[i];
+    bool bit = samples[i] < 0;
 
-    m_bitBuffer[m_bitPtr] <<= 1;
-    if (sample < 0)
-      m_bitBuffer[m_bitPtr] |= 0x01U;
-
-    m_dataBuffer[m_dataPtr] = sample;
-
-    switch (m_rxState) {
-      case DSRXS_HEADER:
-        processHeader(sample);
-        break;
-      case DSRXS_DATA:
-        processData();
-        break;
-      default:
-        processNone(sample);
-        break;
+    if (bit != m_prev) {
+      if (m_pll < (PLLMAX / 2U))
+        m_pll += INC;
+      else
+        m_pll -= INC;
     }
 
-    m_dataPtr++;
-    if (m_dataPtr >= DSTAR_DATA_LENGTH_SAMPLES)
-      m_dataPtr = 0U;
+    m_prev = bit;
 
-    m_bitPtr++;
-    if (m_bitPtr >= DSTAR_RADIO_SYMBOL_LENGTH)
-      m_bitPtr = 0U;
+    m_pll += PLLINC;
+
+    if (m_pll >= PLLMAX) {
+      m_pll -= PLLMAX;
+
+      switch (m_rxState) {
+        case DSRXS_NONE:
+          processNone(bit);
+          break;
+        case DSRXS_HEADER:
+          processHeader(bit);
+          break;
+        case DSRXS_DATA:
+          processData(bit);
+          break;
+        default:
+          break;
+      }
+    }
   }
 }
 
-void CDStarRX::processNone(q15_t sample)
+void CDStarRX::processNone(bool bit)
 {
-  // Fuzzy matching of the frame sync sequence
-  bool ret = correlateFrameSync();
-  if (ret) {
-    m_countdown = 5U;
+  m_patternBuffer <<= 1;
+  if (bit)
+    m_patternBuffer |= 0x01U;
 
-    m_headerBuffer[m_headerPtr] = sample;
-    m_headerPtr++;
+  // Fuzzy matching of the frame sync sequence
+  if (countBits32((m_patternBuffer & FRAME_SYNC_MASK) ^ FRAME_SYNC_DATA) <= FRAME_SYNC_ERRS) {
+    DEBUG1("DStarRX: found frame sync in None");
+
+    ::memset(m_rxBuffer, 0x00U, DSTAR_FEC_SECTION_LENGTH_BYTES);
+    m_rxBufferBits = 0U;
 
     m_rssiAccum = 0U;
     m_rssiCount = 0U;
 
     m_rxState = DSRXS_HEADER;
-
     return;
   }
 
-  // Fuzzy matching of the data sync bit sequence
-  ret = correlateDataSync();
-  if (ret) {
+  // Exact matching of the data sync bit sequence
+  if (countBits32((m_patternBuffer & DATA_SYNC_MASK) ^ DATA_SYNC_DATA) == 0U) {
     DEBUG1("DStarRX: found data sync in None");
 
     io.setDecode(true);
     io.setADCDetection(true);
 
-    m_rxState = DSRXS_DATA;
+    // Suppress RSSI on the dummy sync message
+    m_rssiAccum = 0U;
+    m_rssiCount = 0U;
+
+    ::memcpy(m_rxBuffer, DSTAR_DATA_SYNC_BYTES, DSTAR_DATA_LENGTH_BYTES);
+    writeRSSIData(m_rxBuffer);
+
+    ::memset(m_rxBuffer, 0x00U, DSTAR_DATA_LENGTH_BYTES + 2U);
+    m_rxBufferBits = 0U;
+
+    m_dataBits  = MAX_SYNC_BITS;
+    m_rxState   = DSRXS_DATA;
+    return;
   }
 }
 
-void CDStarRX::processHeader(q15_t sample)
+void CDStarRX::processHeader(bool bit)
 {
-  if (m_countdown > 0U) {
-    correlateFrameSync();
-    m_countdown--;
-  }
+  m_patternBuffer <<= 1;
+  if (bit)
+    m_patternBuffer |= 0x01U;
 
-  m_headerBuffer[m_headerPtr] = sample;
-  m_headerPtr++;
+  WRITE_BIT2(m_rxBuffer, m_rxBufferBits, bit);
+  m_rxBufferBits++;
 
   // A full FEC header
-  if (m_headerPtr == (DSTAR_FEC_SECTION_LENGTH_SAMPLES + DSTAR_RADIO_SYMBOL_LENGTH)) {
-    uint8_t buffer[DSTAR_FEC_SECTION_LENGTH_BYTES];
-    samplesToBits(m_headerBuffer, DSTAR_RADIO_SYMBOL_LENGTH, DSTAR_FEC_SECTION_LENGTH_SYMBOLS, buffer, DSTAR_FEC_SECTION_LENGTH_SAMPLES);
-
-    // Process the scrambling, interleaving and FEC, then return true if the chcksum was correct
-    uint8_t header[DSTAR_HEADER_LENGTH_BYTES];
-    bool ok = rxHeader(buffer, header);
-    if (!ok) {
-      // The checksum failed, return to looking for syncs
-      m_rxState = DSRXS_NONE;
-      m_maxFrameCorr = 0;
-      m_maxDataCorr  = 0;
-    } else {
+  if (m_rxBufferBits == DSTAR_FEC_SECTION_LENGTH_BITS) {
+    // Process the scrambling, interleaving and FEC, then return if the chcksum was correct
+    unsigned char header[DSTAR_HEADER_LENGTH_BYTES];
+    bool ok = rxHeader(m_rxBuffer, header);
+    if (ok) {
       io.setDecode(true);
       io.setADCDetection(true);
 
       writeRSSIHeader(header);
+
+      ::memset(m_rxBuffer, 0x00U, DSTAR_DATA_LENGTH_BYTES + 2U);
+      m_rxBufferBits = 0U;
+
+      m_rxState  = DSRXS_DATA;
+      m_dataBits = MAX_SYNC_BITS;
+    } else {
+      // The checksum failed, return to looking for syncs
+      m_rxState = DSRXS_NONE;
     }
   }
-
-  // Ready to start the first data section
-  if (m_headerPtr == (DSTAR_FEC_SECTION_LENGTH_SAMPLES + 2U * DSTAR_RADIO_SYMBOL_LENGTH)) {
-    m_frameCount = 0U;
-    m_dataPtr    = 0U;
-
-    m_startPtr   = 476U;
-    m_syncPtr    = 471U;
-    m_maxSyncPtr = 472U;
-    m_minSyncPtr = 470U;
-
-    DEBUG5("DStarRX: calc start/sync/max/min", m_startPtr, m_syncPtr, m_maxSyncPtr, m_minSyncPtr);
-
-    m_rxState = DSRXS_DATA;
-  }
 }
 
-void CDStarRX::processData()
+void CDStarRX::processData(bool bit)
 {
+  m_patternBuffer <<= 1;
+  if (bit)
+    m_patternBuffer |= 0x01U;
+
+  WRITE_BIT2(m_rxBuffer, m_rxBufferBits, bit);
+  m_rxBufferBits++;
+
   // Fuzzy matching of the end frame sequences
-  if (countBits64((m_bitBuffer[m_bitPtr] & DSTAR_END_SYNC_MASK) ^ DSTAR_END_SYNC_DATA) <= END_SYNC_ERRS) {
+  if (countBits32((m_patternBuffer & END_SYNC_MASK) ^ END_SYNC_DATA) <= END_SYNC_ERRS) {
     DEBUG1("DStarRX: Found end sync in Data");
 
     io.setDecode(false);
@@ -406,24 +401,35 @@ void CDStarRX::processData()
 
     serial.writeDStarEOT();
 
-    m_maxFrameCorr = 0;
-    m_maxDataCorr  = 0;
-
     m_rxState = DSRXS_NONE;
     return;
   }
 
   // Fuzzy matching of the data sync bit sequence
-  if (m_minSyncPtr < m_maxSyncPtr) {
-    if (m_dataPtr >= m_minSyncPtr && m_dataPtr <= m_maxSyncPtr)
-      correlateDataSync();
-  } else {
-    if (m_dataPtr >= m_minSyncPtr || m_dataPtr <= m_maxSyncPtr)
-      correlateDataSync();
+  bool syncSeen = false;
+  if (m_rxBufferBits >= (DSTAR_DATA_LENGTH_BITS - 3U)) {
+    if (countBits32((m_patternBuffer & DATA_SYNC_MASK) ^ DATA_SYNC_DATA) <= DATA_SYNC_ERRS) {
+      m_rxBufferBits = DSTAR_DATA_LENGTH_BITS;
+      m_dataBits     = MAX_SYNC_BITS;
+      syncSeen       = true;
+    }
   }
 
-  // We've not seen a data sync for too long, signal RXLOST and change to RX_NONE
-  if (m_frameCount >= MAX_FRAMES) {
+  // Check to see if the sync is arriving late
+  if (m_rxBufferBits == DSTAR_DATA_LENGTH_BITS && !syncSeen) {
+    for (uint8_t i = 1U; i <= 3U; i++) {
+      uint32_t syncMask = DATA_SYNC_MASK >> i;
+      uint32_t syncData = DATA_SYNC_DATA >> i;
+      if (countBits32((m_patternBuffer & syncMask) ^ syncData) <= DATA_SYNC_ERRS) {
+        m_rxBufferBits -= i;
+        break;
+      }
+    }
+  }
+
+  m_dataBits--;
+
+  if (m_dataBits == 0U) {
     DEBUG1("DStarRX: data sync timed out, lost lock");
 
     io.setDecode(false);
@@ -431,35 +437,24 @@ void CDStarRX::processData()
 
     serial.writeDStarLost();
 
-    m_maxFrameCorr = 0;
-    m_maxDataCorr  = 0;
-
     m_rxState = DSRXS_NONE;
     return;
   }
 
-  // Send a data frame to the host if the required number of bits have been received
-  if (m_dataPtr == m_maxSyncPtr) {
-    uint8_t buffer[DSTAR_DATA_LENGTH_BYTES + 2U];
-    samplesToBits(m_dataBuffer, m_startPtr, DSTAR_DATA_LENGTH_SYMBOLS, buffer, DSTAR_DATA_LENGTH_SAMPLES);
-
-    if ((m_frameCount % 21U) == 0U) {
-      if (m_frameCount == 0U) {
-        buffer[9U]  = DSTAR_DATA_SYNC_BYTES[9U];
-        buffer[10U] = DSTAR_DATA_SYNC_BYTES[10U];
-        buffer[11U] = DSTAR_DATA_SYNC_BYTES[11U];
-        DEBUG5("DStarRX: found start/sync/max/min", m_startPtr, m_syncPtr, m_maxSyncPtr, m_minSyncPtr);
-      }
-
-      writeRSSIData(buffer);
+  // Send a data frame to the host if the required number of bits have been received, or if a data sync has been seen
+  if (m_rxBufferBits == DSTAR_DATA_LENGTH_BITS) {
+    if (syncSeen) {
+      m_rxBuffer[9U]  = DSTAR_DATA_SYNC_BYTES[9U];
+      m_rxBuffer[10U] = DSTAR_DATA_SYNC_BYTES[10U];
+      m_rxBuffer[11U] = DSTAR_DATA_SYNC_BYTES[11U];
+	    writeRSSIData(m_rxBuffer);
     } else {
-      serial.writeDStarData(buffer, DSTAR_DATA_LENGTH_BYTES);
-    }
+	    serial.writeDStarData(m_rxBuffer, DSTAR_DATA_LENGTH_BYTES);
+	  }
 
-    m_frameCount++;
-
-    m_maxFrameCorr = 0;
-    m_maxDataCorr  = 0;
+    // Start the next frame
+    ::memset(m_rxBuffer, 0x00U, DSTAR_DATA_LENGTH_BYTES + 2U);
+    m_rxBufferBits = 0U;
   }
 }
 
@@ -505,105 +500,6 @@ void CDStarRX::writeRSSIData(unsigned char* data)
   m_rssiCount = 0U;
 }
 
-bool CDStarRX::correlateFrameSync()
-{
-  if (countBits64((m_bitBuffer[m_bitPtr] & DSTAR_FRAME_SYNC_MASK) ^ DSTAR_FRAME_SYNC_DATA) <= FRAME_SYNC_ERRS) {
-    uint16_t ptr = m_dataPtr + DSTAR_DATA_LENGTH_SAMPLES - DSTAR_FRAME_SYNC_LENGTH_SAMPLES + DSTAR_RADIO_SYMBOL_LENGTH;
-    if (ptr >= DSTAR_DATA_LENGTH_SAMPLES)
-      ptr -= DSTAR_DATA_LENGTH_SAMPLES;
-
-    q31_t corr = 0;
-
-    for (uint8_t i = 0U; i < DSTAR_FRAME_SYNC_LENGTH_SYMBOLS; i++) {
-      q15_t val = m_dataBuffer[ptr];
-
-      if (DSTAR_FRAME_SYNC_SYMBOLS[i])
-        corr -= val;
-      else
-        corr += val;
-
-      ptr += DSTAR_RADIO_SYMBOL_LENGTH;
-      if (ptr >= DSTAR_DATA_LENGTH_SAMPLES)
-        ptr -= DSTAR_DATA_LENGTH_SAMPLES;
-    }
-
-    if (corr > m_maxFrameCorr) {
-      m_maxFrameCorr = corr;
-      m_headerPtr    = 0U;
-      return true;
-    }
-  }
-
-  return false;
-}
-
-bool CDStarRX::correlateDataSync()
-{
-  uint8_t maxErrs = 0U;
-  if (m_rxState == DSRXS_DATA)
-    maxErrs = DATA_SYNC_ERRS;
-
-  if (countBits64((m_bitBuffer[m_bitPtr] & DSTAR_DATA_SYNC_MASK) ^ DSTAR_DATA_SYNC_DATA) <= maxErrs) {
-    uint16_t ptr = m_dataPtr + DSTAR_DATA_LENGTH_SAMPLES - DSTAR_DATA_SYNC_LENGTH_SAMPLES + DSTAR_RADIO_SYMBOL_LENGTH;
-    if (ptr >= DSTAR_DATA_LENGTH_SAMPLES)
-      ptr -= DSTAR_DATA_LENGTH_SAMPLES;
-
-    q31_t corr = 0;
-
-    for (uint8_t i = 0U; i < DSTAR_DATA_SYNC_LENGTH_SYMBOLS; i++) {
-      q15_t val = m_dataBuffer[ptr];
-
-      if (DSTAR_DATA_SYNC_SYMBOLS[i])
-        corr -= val;
-      else
-        corr += val;
-
-      ptr += DSTAR_RADIO_SYMBOL_LENGTH;
-      if (ptr >= DSTAR_DATA_LENGTH_SAMPLES)
-        ptr -= DSTAR_DATA_LENGTH_SAMPLES;
-    }
-
-    if (corr > m_maxDataCorr) {
-      m_maxDataCorr = corr;
-      m_frameCount  = 0U;
-
-      m_syncPtr    = m_dataPtr;
-
-      m_startPtr   = m_dataPtr + DSTAR_RADIO_SYMBOL_LENGTH;
-      if (m_startPtr >= DSTAR_DATA_LENGTH_SAMPLES)
-        m_startPtr -= DSTAR_DATA_LENGTH_SAMPLES;
-
-      m_maxSyncPtr = m_syncPtr + 1U;
-      if (m_maxSyncPtr >= DSTAR_DATA_LENGTH_SAMPLES)
-        m_maxSyncPtr -= DSTAR_DATA_LENGTH_SAMPLES;
-
-      m_minSyncPtr = m_syncPtr + DSTAR_DATA_LENGTH_SAMPLES - 1U;
-      if (m_minSyncPtr >= DSTAR_DATA_LENGTH_SAMPLES)
-        m_minSyncPtr -= DSTAR_DATA_LENGTH_SAMPLES;
-
-      return true;
-    }
-  }
-
-  return false;
-}
-
-void CDStarRX::samplesToBits(const q15_t* inBuffer, uint16_t start, uint16_t count, uint8_t* outBuffer, uint16_t limit)
-{
-  for (uint16_t i = 0U; i < count; i++) {
-    q15_t sample = inBuffer[start];
-
-    if (sample < 0)
-      WRITE_BIT2(outBuffer, i, true);
-    else
-      WRITE_BIT2(outBuffer, i, false);
-
-    start += DSTAR_RADIO_SYMBOL_LENGTH;
-    if (start >= limit)
-      start -= limit;
-  }
-}
-
 bool CDStarRX::rxHeader(uint8_t* in, uint8_t* out)
 {
   int i;
@@ -819,6 +715,3 @@ bool CDStarRX::checksum(const uint8_t* header) const
 
   return crc8[0U] == header[DSTAR_HEADER_LENGTH_BYTES - 2U] && crc8[1U] == header[DSTAR_HEADER_LENGTH_BYTES - 1U];
 }
-
-#endif
-

DStarRX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,13 +16,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DSTAR)
-
 #if !defined(DSTARRX_H)
 #define  DSTARRX_H
 
+#include "Config.h"
 #include "DStarDefines.h"
 
 enum DSRX_STATE {
@@ -40,21 +37,13 @@ public:
   void reset();
 
 private:
+  uint32_t     m_pll;
+  bool         m_prev;
   DSRX_STATE   m_rxState;
-  uint64_t     m_bitBuffer[DSTAR_RADIO_SYMBOL_LENGTH];
-  q15_t        m_headerBuffer[DSTAR_FEC_SECTION_LENGTH_SAMPLES + 2U * DSTAR_RADIO_SYMBOL_LENGTH];
-  q15_t        m_dataBuffer[DSTAR_DATA_LENGTH_SAMPLES];
-  uint16_t     m_bitPtr;
-  uint16_t     m_headerPtr;
-  uint16_t     m_dataPtr;
-  uint16_t     m_startPtr;
-  uint16_t     m_syncPtr;
-  uint16_t     m_minSyncPtr;
-  uint16_t     m_maxSyncPtr;
-  q31_t        m_maxFrameCorr;
-  q31_t        m_maxDataCorr;
-  uint16_t     m_frameCount;
-  uint8_t      m_countdown;
+  uint32_t     m_patternBuffer;
+  uint8_t      m_rxBuffer[100U];
+  unsigned int m_rxBufferBits;
+  unsigned int m_dataBits;
   unsigned int m_mar;
   int          m_pathMetric[4U];
   unsigned int m_pathMemory0[42U];
@@ -65,12 +54,9 @@ private:
   uint32_t     m_rssiAccum;
   uint16_t     m_rssiCount;
   
-  void    processNone(q15_t sample);
-  void    processHeader(q15_t sample);
-  void    processData();
-  bool    correlateFrameSync();
-  bool    correlateDataSync();
-  void    samplesToBits(const q15_t* inBuffer, uint16_t start, uint16_t count, uint8_t* outBuffer, uint16_t limit);
+  void    processNone(bool bit);
+  void    processHeader(bool bit);
+  void    processData(bool bit);
   void    writeRSSIHeader(unsigned char* header);
   void    writeRSSIData(unsigned char* data);
   bool    rxHeader(uint8_t* in, uint8_t* out);
@@ -82,5 +68,3 @@ private:
 
 #endif
 
-#endif
-

DStarTX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2017 by Andy Uribe CA6JAU
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -18,9 +18,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_DSTAR)
-
 #include "Globals.h"
 #include "DStarTX.h"
 
@@ -201,7 +198,7 @@ m_txDelay(60U)       // 100ms
 {
   ::memset(m_modState, 0x00U, 20U * sizeof(q15_t));
 
-  m_modFilter.L           = DSTAR_RADIO_SYMBOL_LENGTH;
+  m_modFilter.L           = DSTAR_RADIO_BIT_LENGTH;
   m_modFilter.phaseLength = GAUSSIAN_0_35_FILTER_PHASE_LEN;
   m_modFilter.pCoeffs     = GAUSSIAN_0_35_FILTER;
   m_modFilter.pState      = m_modState;
@@ -220,12 +217,11 @@ void CDStarTX::process()
         m_poBuffer[m_poLen++] = BIT_SYNC;
     } else {
       // Pop the type byte off
-      uint8_t dummy;
-      m_buffer.get(dummy);
+      m_buffer.get();
 
       uint8_t header[DSTAR_HEADER_LENGTH_BYTES];
       for (uint8_t i = 0U; i < DSTAR_HEADER_LENGTH_BYTES; i++)
-        m_buffer.get(header[i]);
+        header[i] = m_buffer.get();
 
       uint8_t buffer[86U];
       txHeader(header, buffer + 2U);
@@ -243,23 +239,21 @@ void CDStarTX::process()
  
   if (type == DSTAR_DATA && m_poLen == 0U) {
     // Pop the type byte off
-    uint8_t dummy;
-    m_buffer.get(dummy);
+    m_buffer.get();
 
     for (uint8_t i = 0U; i < DSTAR_DATA_LENGTH_BYTES; i++)
-      m_buffer.get(m_poBuffer[m_poLen++]);
+      m_poBuffer[m_poLen++] = m_buffer.get();
 
     m_poPtr = 0U;
   }
 
   if (type == DSTAR_EOT && m_poLen == 0U) {
     // Pop the type byte off
-    uint8_t dummy;
-    m_buffer.get(dummy);
+    m_buffer.get();
 
     for (uint8_t j = 0U; j < 3U; j++) {
-      for (uint8_t i = 0U; i < DSTAR_END_SYNC_LENGTH_BYTES; i++)
-        m_poBuffer[m_poLen++] = DSTAR_END_SYNC_BYTES[i];
+      for (uint8_t i = 0U; i < DSTAR_EOT_LENGTH_BYTES; i++)
+        m_poBuffer[m_poLen++] = DSTAR_EOT_BYTES[i];
     }
      
     m_poPtr = 0U;
@@ -268,11 +262,11 @@ void CDStarTX::process()
   if (m_poLen > 0U) {
     uint16_t space = io.getSpace();
     
-    while (space > (8U * DSTAR_RADIO_SYMBOL_LENGTH)) {
+    while (space > (8U * DSTAR_RADIO_BIT_LENGTH)) {
       uint8_t c = m_poBuffer[m_poPtr++];
       writeByte(c);
 
-      space -= 8U * DSTAR_RADIO_SYMBOL_LENGTH;
+      space -= 8U * DSTAR_RADIO_BIT_LENGTH;
       
       if (m_poPtr >= m_poLen) {
         m_poPtr = 0U;
@@ -283,7 +277,7 @@ void CDStarTX::process()
   }
 }
 
-uint8_t CDStarTX::writeHeader(const uint8_t* header, uint16_t length)
+uint8_t CDStarTX::writeHeader(const uint8_t* header, uint8_t length)
 {
   if (length != DSTAR_HEADER_LENGTH_BYTES)
     return 4U;
@@ -302,7 +296,7 @@ uint8_t CDStarTX::writeHeader(const uint8_t* header, uint16_t length)
   return 0U;
 }
 
-uint8_t CDStarTX::writeData(const uint8_t* data, uint16_t length)
+uint8_t CDStarTX::writeData(const uint8_t* data, uint8_t length)
 {
   if (length != DSTAR_DATA_LENGTH_BYTES)
     return 4U;
@@ -418,7 +412,7 @@ void CDStarTX::txHeader(const uint8_t* in, uint8_t* out) const
 void CDStarTX::writeByte(uint8_t c)
 {
   q15_t inBuffer[8U];
-  q15_t outBuffer[DSTAR_RADIO_SYMBOL_LENGTH * 8U];
+  q15_t outBuffer[DSTAR_RADIO_BIT_LENGTH * 8U];
 
   uint8_t mask = 0x01U;
 
@@ -433,7 +427,7 @@ void CDStarTX::writeByte(uint8_t c)
 
   ::arm_fir_interpolate_q15(&m_modFilter, inBuffer, outBuffer, 8U);
   
-  io.write(STATE_DSTAR, outBuffer, DSTAR_RADIO_SYMBOL_LENGTH * 8U);
+  io.write(STATE_DSTAR, outBuffer, DSTAR_RADIO_BIT_LENGTH * 8U);
 }
 
 void CDStarTX::setTXDelay(uint8_t delay)
@@ -449,5 +443,3 @@ uint8_t CDStarTX::getSpace() const
   return m_buffer.getSpace() / (DSTAR_DATA_LENGTH_BYTES + 1U);
 }
 
-#endif
-

DStarTX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,21 +16,19 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_DSTAR)
-
 #if !defined(DSTARTX_H)
 #define  DSTARTX_H
 
-#include "RingBuffer.h"
+#include "Config.h"
+
+#include "SerialRB.h"
 
 class CDStarTX {
 public:
   CDStarTX();
 
-  uint8_t writeHeader(const uint8_t* header, uint16_t length);
-  uint8_t writeData(const uint8_t* data, uint16_t length);
+  uint8_t writeHeader(const uint8_t* header, uint8_t length);
+  uint8_t writeData(const uint8_t* data, uint8_t length);
   uint8_t writeEOT();
 
   void process();
@@ -40,7 +38,7 @@ public:
   uint8_t getSpace() const;
 
 private:
-  CRingBuffer<uint8_t>             m_buffer;
+  CSerialRB                        m_buffer;
   arm_fir_interpolate_instance_q15 m_modFilter;
   q15_t                            m_modState[20U];    // blockSize + phaseLength - 1, 8 + 9 - 1 plus some spare
   uint8_t                          m_poBuffer[600U];
@@ -54,5 +52,3 @@ private:
 
 #endif
 
-#endif
-

Debug.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2021 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -27,7 +27,6 @@
 #define  DEBUG3(a,b,c)      serial.writeDebug((a),(b),(c))
 #define  DEBUG4(a,b,c,d)    serial.writeDebug((a),(b),(c),(d))
 #define  DEBUG5(a,b,c,d,e)  serial.writeDebug((a),(b),(c),(d),(e))
-#define  DEBUG_DUMP(a,b)    serial.writeDebugDump((a),(b))
 
 #endif
 

FM.cpp

@@ -0,0 +1,490 @@
+/*
+ *   Copyright (C) 2020 by Jonathan Naylor G4KLX
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+#include "Globals.h"
+#include "FM.h"
+
+CFM::CFM() :
+m_callsign(),
+m_rfAck(),
+m_ctcssRX(),
+m_ctcssTX(),
+m_timeoutTone(),
+m_state(FS_LISTENING),
+m_callsignAtStart(false),
+m_callsignAtEnd(false),
+m_callsignAtLatch(false),
+m_callsignTimer(),
+m_timeoutTimer(),
+m_holdoffTimer(),
+m_kerchunkTimer(),
+m_ackMinTimer(),
+m_ackDelayTimer(),
+m_hangTimer(),
+m_filterStage1(  724,   1448,   724, 32768, -37895, 21352),//3rd order Cheby Filter 300 to 2700Hz, 0.2dB passband ripple, sampling rate 24kHz
+m_filterStage2(32768,      0,-32768, 32768, -50339, 19052),
+m_filterStage3(32768, -65536, 32768, 32768, -64075, 31460),
+m_blanking(),
+m_useCOS(true),
+m_cosInvert(false),
+m_rfAudioBoost(1U),
+m_downsampler(128U),//Size might need adjustement
+m_rxLevel(1),
+m_inputRB(4800U),   // 200ms of audio
+m_outputRB(2400U)   // 100ms of audio
+{
+  insertDelay(100U);
+}
+
+void CFM::samples(bool cos, const q15_t* samples, uint8_t length)
+{
+  if (m_useCOS) {
+    if (m_cosInvert)
+      cos = !cos;
+  } else {
+    cos = true;
+  }
+
+  clock(length);
+
+  uint8_t i = 0U;
+  for (; i < length; i++) {
+    // ARMv7-M has hardware integer division 
+    q15_t currentSample = q15_t((q31_t(samples[i]) << 8) / m_rxLevel);
+
+    uint8_t ctcssState = m_ctcssRX.process(currentSample);
+
+    if (!m_useCOS) {
+      // Delay the audio by 100ms to better match the CTCSS detector output
+      m_inputRB.put(currentSample);
+      m_inputRB.get(currentSample);
+    }
+
+    if (CTCSS_NOT_READY(ctcssState) && m_modemState != STATE_FM) {
+      //Not enough samples to determine if you have CTCSS, just carry on
+      continue;
+    } else if (CTCSS_READY(ctcssState) && m_modemState != STATE_FM) {
+      //we had enough samples for CTCSS and we are in some other mode than FM
+      bool validCTCSS = CTCSS_VALID(ctcssState);
+      stateMachine(validCTCSS && cos);
+      if (m_modemState != STATE_FM)
+        continue;
+    } else if (CTCSS_READY(ctcssState) && m_modemState == STATE_FM) {
+      //We had enough samples for CTCSS and we are in FM mode, trigger the state machine
+      bool validCTCSS = CTCSS_VALID(ctcssState);
+      stateMachine(validCTCSS && cos);
+      if (m_modemState != STATE_FM)
+        break;
+    } else if (CTCSS_NOT_READY(ctcssState) && m_modemState == STATE_FM && i == length - 1) {
+      //Not enough samples for CTCSS but we already are in FM, trigger the state machine
+      //but do not trigger the state machine on every single sample, save CPU!
+      bool validCTCSS = CTCSS_VALID(ctcssState);
+      stateMachine(validCTCSS && cos);
+    }
+
+    // Only let audio through when relaying audio
+    if (m_state == FS_RELAYING || m_state == FS_KERCHUNK) {  
+      // m_downsampler.addSample(currentSample);
+      currentSample = m_blanking.process(currentSample);
+      currentSample *= m_rfAudioBoost;
+    } else {
+      currentSample = 0;
+    }
+
+    if (!m_callsign.isRunning())
+      currentSample += m_rfAck.getHighAudio();
+    
+    if (!m_rfAck.isRunning()) {
+      if (m_state == FS_LISTENING)
+        currentSample += m_callsign.getHighAudio();
+      else
+        currentSample += m_callsign.getLowAudio();
+    }
+
+    if (!m_callsign.isRunning() && !m_rfAck.isRunning())
+      currentSample += m_timeoutTone.getAudio();
+
+    currentSample = m_filterStage3.filter(m_filterStage2.filter(m_filterStage1.filter(currentSample)));
+
+    currentSample += m_ctcssTX.getAudio();
+
+    if (m_modemState == STATE_FM)
+      m_outputRB.put(currentSample);
+  }
+}
+
+void CFM::process()
+{
+  q15_t sample;
+  while (io.getSpace() >= 3U && m_outputRB.get(sample))
+    io.write(STATE_FM, &sample, 1U);
+}
+
+void CFM::reset()
+{
+  m_state = FS_LISTENING;
+
+  m_callsignTimer.stop();
+  m_timeoutTimer.stop();
+  m_kerchunkTimer.stop();
+  m_ackMinTimer.stop();
+  m_ackDelayTimer.stop();
+  m_hangTimer.stop();
+
+  m_ctcssRX.reset();
+  m_rfAck.stop();
+  m_callsign.stop();
+  m_timeoutTone.stop();
+
+  m_outputRB.reset();
+}
+
+uint8_t CFM::setCallsign(const char* callsign, uint8_t speed, uint16_t frequency, uint8_t time, uint8_t holdoff, uint8_t highLevel, uint8_t lowLevel, bool callsignAtStart, bool callsignAtEnd, bool callsignAtLatch)
+{
+  m_callsignAtStart = callsignAtStart;
+  m_callsignAtEnd   = callsignAtEnd;
+  m_callsignAtLatch = callsignAtLatch;
+
+  uint16_t holdoffTime  = holdoff * 60U;
+  uint16_t callsignTime = time * 60U;
+
+  m_holdoffTimer.setTimeout(holdoffTime, 0U);
+  m_callsignTimer.setTimeout(callsignTime, 0U);
+
+  if (holdoffTime > 0U)
+    m_holdoffTimer.start();
+
+  return m_callsign.setParams(callsign, speed, frequency, highLevel, lowLevel);
+}
+
+uint8_t CFM::setAck(const char* rfAck, uint8_t speed, uint16_t frequency, uint8_t minTime, uint16_t delay, uint8_t level)
+{
+  m_ackDelayTimer.setTimeout(0U, delay);
+
+  if (minTime > 0U)
+    m_ackMinTimer.setTimeout(minTime, delay);
+
+  return m_rfAck.setParams(rfAck, speed, frequency, level, level);
+}
+
+uint8_t CFM::setMisc(uint16_t timeout, uint8_t timeoutLevel, uint8_t ctcssFrequency, uint8_t ctcssHighThreshold, uint8_t ctcssLowThreshold, uint8_t ctcssLevel, uint8_t kerchunkTime, uint8_t hangTime, bool useCOS, bool cosInvert, uint8_t rfAudioBoost, uint8_t maxDev, uint8_t rxLevel)
+{
+  m_useCOS    = useCOS;
+  m_cosInvert = cosInvert;
+
+  m_rfAudioBoost = q15_t(rfAudioBoost);
+
+  m_timeoutTimer.setTimeout(timeout, 0U);
+  m_kerchunkTimer.setTimeout(kerchunkTime, 0U);
+  m_hangTimer.setTimeout(hangTime, 0U);
+
+  m_timeoutTone.setParams(timeoutLevel);
+  m_blanking.setParams(maxDev, timeoutLevel);
+
+  m_rxLevel = rxLevel; //q15_t(255)/q15_t(rxLevel >> 1);
+
+  uint8_t ret = m_ctcssRX.setParams(ctcssFrequency, ctcssHighThreshold, ctcssLowThreshold);
+  if (ret != 0U)
+    return ret;
+
+  return m_ctcssTX.setParams(ctcssFrequency, ctcssLevel);
+}
+
+void CFM::stateMachine(bool validSignal)
+{
+  switch (m_state) {
+    case FS_LISTENING:
+      listeningState(validSignal);
+      break;
+    case FS_KERCHUNK:
+      kerchunkState(validSignal);
+      break;
+    case FS_RELAYING:
+      relayingState(validSignal);
+      break;
+    case FS_RELAYING_WAIT:
+      relayingWaitState(validSignal);
+      break;
+    case FS_TIMEOUT:
+      timeoutState(validSignal);
+      break;
+    case FS_TIMEOUT_WAIT:
+      timeoutWaitState(validSignal);
+      break;
+    case FS_HANG:
+      hangState(validSignal);
+      break;
+    default:
+      break;
+  }
+
+  if (m_state == FS_LISTENING && m_modemState == STATE_FM) {
+    if (!m_callsign.isWanted() && !m_rfAck.isWanted()) {
+      DEBUG1("Change to STATE_IDLE");
+      m_modemState = STATE_IDLE;
+      m_callsignTimer.stop();
+      m_timeoutTimer.stop();
+      m_kerchunkTimer.stop();
+      m_ackMinTimer.stop();
+      m_ackDelayTimer.stop();
+      m_hangTimer.stop();
+    }
+  }
+}
+
+void CFM::clock(uint8_t length)
+{
+  m_callsignTimer.clock(length);
+  m_timeoutTimer.clock(length);
+  m_holdoffTimer.clock(length);
+  m_kerchunkTimer.clock(length);
+  m_ackMinTimer.clock(length);
+  m_ackDelayTimer.clock(length);
+  m_hangTimer.clock(length);
+}
+
+void CFM::listeningState(bool validSignal)
+{
+  if (validSignal) {
+    if (m_kerchunkTimer.getTimeout() > 0U) {
+      DEBUG1("State to KERCHUNK");
+      m_state = FS_KERCHUNK;
+      m_kerchunkTimer.start();
+      if (m_callsignAtStart && !m_callsignAtLatch)
+        sendCallsign();
+    } else {
+      DEBUG1("State to RELAYING");
+      m_state = FS_RELAYING;
+      if (m_callsignAtStart)
+        sendCallsign();
+    }
+
+    insertSilence(50U);
+
+    beginRelaying();
+
+    m_callsignTimer.start();
+
+    io.setDecode(true);
+    io.setADCDetection(true);
+
+    DEBUG1("Change to STATE_FM");
+    m_modemState = STATE_FM;
+  }
+}
+
+void CFM::kerchunkState(bool validSignal)
+{
+  if (validSignal) {
+    if (m_kerchunkTimer.hasExpired()) {
+      DEBUG1("State to RELAYING");
+      m_state = FS_RELAYING;
+      m_kerchunkTimer.stop();
+      if (m_callsignAtStart && m_callsignAtLatch) {
+        sendCallsign();
+        m_callsignTimer.start();
+      }
+    }
+  } else {
+    io.setDecode(false);
+    io.setADCDetection(false);
+
+    DEBUG1("State to LISTENING");
+    m_state = FS_LISTENING;
+    m_kerchunkTimer.stop();
+    m_timeoutTimer.stop();
+    m_ackMinTimer.stop();
+    m_callsignTimer.stop();
+  }
+}
+
+void CFM::relayingState(bool validSignal)
+{
+  if (validSignal) {
+    if (m_timeoutTimer.isRunning() && m_timeoutTimer.hasExpired()) {
+      DEBUG1("State to TIMEOUT");
+      m_state = FS_TIMEOUT;
+      m_ackMinTimer.stop();
+      m_timeoutTimer.stop();
+      m_timeoutTone.start();
+    }
+  } else {
+    io.setDecode(false);
+    io.setADCDetection(false);
+
+    DEBUG1("State to RELAYING_WAIT");
+    m_state = FS_RELAYING_WAIT;
+    m_ackDelayTimer.start();
+  }
+
+  if (m_callsignTimer.isRunning() && m_callsignTimer.hasExpired()) {
+    sendCallsign();
+    m_callsignTimer.start();
+  }
+}
+
+void CFM::relayingWaitState(bool validSignal)
+{
+  if (validSignal) {
+    io.setDecode(true);
+    io.setADCDetection(true);
+
+    DEBUG1("State to RELAYING");
+    m_state = FS_RELAYING;
+    m_ackDelayTimer.stop();
+  } else {
+    if (m_ackDelayTimer.isRunning() && m_ackDelayTimer.hasExpired()) {
+      DEBUG1("State to HANG");
+      m_state = FS_HANG;
+
+      if (m_ackMinTimer.isRunning()) {
+        if (m_ackMinTimer.hasExpired()) {
+          DEBUG1("Send ack");
+          m_rfAck.start();
+          m_ackMinTimer.stop();
+        }
+      } else {
+          DEBUG1("Send ack");
+          m_rfAck.start();
+          m_ackMinTimer.stop();
+      }
+
+      m_ackDelayTimer.stop();
+      m_timeoutTimer.stop();
+      m_hangTimer.start();
+    }
+  }
+
+  if (m_callsignTimer.isRunning() && m_callsignTimer.hasExpired()) {
+    sendCallsign();
+    m_callsignTimer.start();
+  }
+}
+
+void CFM::hangState(bool validSignal)
+{
+  if (validSignal) {
+    io.setDecode(true);
+    io.setADCDetection(true);
+
+    DEBUG1("State to RELAYING");
+    m_state = FS_RELAYING;
+    DEBUG1("Stop ack");
+    m_rfAck.stop();
+    beginRelaying();
+  } else {
+    if (m_hangTimer.isRunning() && m_hangTimer.hasExpired()) {
+      DEBUG1("State to LISTENING");
+      m_state = FS_LISTENING;
+      m_hangTimer.stop();
+
+      if (m_callsignAtEnd)
+        sendCallsign();
+
+      m_callsignTimer.stop();
+    }
+  }
+
+  if (m_callsignTimer.isRunning() && m_callsignTimer.hasExpired()) {
+    sendCallsign();
+    m_callsignTimer.start();
+  }
+}
+
+void CFM::timeoutState(bool validSignal)
+{
+  if (!validSignal) {
+    io.setDecode(false);
+    io.setADCDetection(false);
+
+    DEBUG1("State to TIMEOUT_WAIT");
+    m_state = FS_TIMEOUT_WAIT;
+    m_ackDelayTimer.start();
+  }
+
+  if (m_callsignTimer.isRunning() && m_callsignTimer.hasExpired()) {
+    sendCallsign();
+    m_callsignTimer.start();
+  }
+}
+
+void CFM::timeoutWaitState(bool validSignal)
+{
+  if (validSignal) {
+    io.setDecode(true);
+    io.setADCDetection(true);
+
+    DEBUG1("State to TIMEOUT");
+    m_state = FS_TIMEOUT;
+    m_ackDelayTimer.stop();
+  } else {
+    if (m_ackDelayTimer.isRunning() && m_ackDelayTimer.hasExpired()) {
+      DEBUG1("State to HANG");
+      m_state = FS_HANG;
+      m_timeoutTone.stop();
+      DEBUG1("Send ack");
+      m_rfAck.start();
+      m_ackDelayTimer.stop();
+      m_ackMinTimer.stop();
+      m_timeoutTimer.stop();
+      m_hangTimer.start();
+    }
+  }
+
+  if (m_callsignTimer.isRunning() && m_callsignTimer.hasExpired()) {
+    sendCallsign();
+    m_callsignTimer.start();
+  }
+}
+
+void CFM::sendCallsign()
+{
+  if (m_holdoffTimer.isRunning()) {
+    if (m_holdoffTimer.hasExpired()) {
+      DEBUG1("Send callsign");
+      m_callsign.start();
+      m_holdoffTimer.start();
+    }
+  } else {
+    DEBUG1("Send callsign");
+    m_callsign.start();
+  }
+}
+
+void CFM::beginRelaying()
+{
+  m_timeoutTimer.start();
+  m_ackMinTimer.start();
+}
+
+void CFM::insertDelay(uint16_t ms)
+{
+  uint32_t nSamples = ms * 24U;
+
+  for (uint32_t i = 0U; i < nSamples; i++)
+    m_inputRB.put(0);
+}
+
+void CFM::insertSilence(uint16_t ms)
+{
+  uint32_t nSamples = ms * 24U;
+
+  for (uint32_t i = 0U; i < nSamples; i++)
+    m_outputRB.put(0);
+}

FM.h

@@ -0,0 +1,108 @@
+/*
+ *   Copyright (C) 2020 by Jonathan Naylor G4KLX
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if !defined(FM_H)
+#define  FM_H
+
+#include "Config.h"
+
+#include "FMBlanking.h"
+#include "FMCTCSSRX.h"
+#include "FMCTCSSTX.h"
+#include "FMTimeout.h"
+#include "FMKeyer.h"
+#include "FMTimer.h"
+#include "FMRB.h"
+#include "FMDirectForm1.h"
+#include "FMDownsampler.h"
+
+enum FM_STATE {
+  FS_LISTENING,
+  FS_KERCHUNK,
+  FS_RELAYING,
+  FS_RELAYING_WAIT,
+  FS_TIMEOUT,
+  FS_TIMEOUT_WAIT,
+  FS_HANG
+};
+
+
+
+
+class CFM {
+public:
+  CFM();
+
+  void samples(bool cos, const q15_t* samples, uint8_t length);
+
+  void process();
+
+  void reset();
+
+  uint8_t setCallsign(const char* callsign, uint8_t speed, uint16_t frequency, uint8_t time, uint8_t holdoff, uint8_t highLevel, uint8_t lowLevel, bool callsignAtStart, bool callsignAtEnd, bool callsignAtLatch);
+  uint8_t setAck(const char* rfAck, uint8_t speed, uint16_t frequency, uint8_t minTime, uint16_t delay, uint8_t level);
+  uint8_t setMisc(uint16_t timeout, uint8_t timeoutLevel, uint8_t ctcssFrequency, uint8_t ctcssHighThreshold, uint8_t ctcssLowThreshold, uint8_t ctcssLevel, uint8_t kerchunkTime, uint8_t hangTime, bool useCOS, bool cosInvert, uint8_t rfAudioBoost, uint8_t maxDev, uint8_t rxLevel);
+
+private:
+  CFMKeyer             m_callsign;
+  CFMKeyer             m_rfAck;
+  CFMCTCSSRX           m_ctcssRX;
+  CFMCTCSSTX           m_ctcssTX;
+  CFMTimeout           m_timeoutTone;
+  FM_STATE             m_state;
+  bool                 m_callsignAtStart;
+  bool                 m_callsignAtEnd;
+  bool                 m_callsignAtLatch;
+  CFMTimer             m_callsignTimer;
+  CFMTimer             m_timeoutTimer;
+  CFMTimer             m_holdoffTimer;
+  CFMTimer             m_kerchunkTimer;
+  CFMTimer             m_ackMinTimer;
+  CFMTimer             m_ackDelayTimer;
+  CFMTimer             m_hangTimer;
+  CFMDirectFormI       m_filterStage1;
+  CFMDirectFormI       m_filterStage2;
+  CFMDirectFormI       m_filterStage3;
+  CFMBlanking          m_blanking;
+  bool                 m_useCOS;
+  bool                 m_cosInvert;
+  q15_t                m_rfAudioBoost;
+  CFMDownsampler       m_downsampler;
+  q15_t                m_rxLevel;
+  CFMRB                m_inputRB;
+  CFMRB                m_outputRB;
+
+  void stateMachine(bool validSignal);
+  void listeningState(bool validSignal);
+  void kerchunkState(bool validSignal);
+  void relayingState(bool validSignal);
+  void relayingWaitState(bool validSignal);
+  void timeoutState(bool validSignal);
+  void timeoutWaitState(bool validSignal);
+  void hangState(bool validSignal);
+
+  void clock(uint8_t length);
+
+  void sendCallsign();
+  void beginRelaying();
+
+  void insertDelay(uint16_t ms);
+  void insertSilence(uint16_t ms);
+};
+
+#endif

FMBlanking.cpp

@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_FM)
-
 #include "Globals.h"
 #include "FMBlanking.h"
 
@@ -83,6 +80,3 @@ q15_t CFMBlanking::process(q15_t sample)
 
   return sample;
 }
-
-#endif
-

FMBlanking.h

@@ -16,13 +16,11 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
 #if !defined(FMBlanking_H)
 #define  FMBlanking_H
 
+#include "Config.h"
+
 class CFMBlanking {
 public:
   CFMBlanking();
@@ -41,6 +39,3 @@ private:
 };
 
 #endif
-
-#endif
-

FMCTCSSRX.cpp

@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_FM)
-
 #include "Globals.h"
 #include "FMCTCSSRX.h"
 
@@ -90,7 +87,7 @@ m_lowThreshold(0),
 m_count(0U),
 m_q0(0),
 m_q1(0),
-m_state(false)
+m_result(CTS_NONE)
 {
 }
 
@@ -114,11 +111,13 @@ uint8_t CFMCTCSSRX::setParams(uint8_t frequency, uint8_t highThreshold, uint8_t
   return 0U;
 }
 
-bool CFMCTCSSRX::process(q15_t sample)
+uint8_t CFMCTCSSRX::process(q15_t sample)
 {
   //get more dynamic into the decoder by multiplying the sample by 1.5
   q31_t sample31 = q31_t(sample) +  (q31_t(sample) >> 1);
 
+  m_result &= ~CTS_READY;
+
   q31_t q2 = m_q1;
   m_q1 = m_q0;
 
@@ -150,32 +149,33 @@ bool CFMCTCSSRX::process(q15_t sample)
     // value = m_q0 * m_q0 + m_q1 * m_q1 - m_q0 * m_q1 * m_coeffDivTwo * 2
     q31_t value = t2 + t4 - t9;
 
-    bool previousState = m_state;
+    bool previousCTCSSValid = CTCSS_VALID(m_result);
 
     q31_t threshold = m_highThreshold;
-    if (previousState)
+    if (previousCTCSSValid)
       threshold = m_lowThreshold;
 
-    m_state = value >= threshold;
+    m_result |= CTS_READY;
+    if (value >= threshold)
+      m_result |= CTS_VALID;
+    else
+      m_result &= ~CTS_VALID;
 
-    if (previousState != m_state)
-      DEBUG4("CTCSS Value / Threshold / Valid", value, threshold, m_state);
+    if (previousCTCSSValid != CTCSS_VALID(m_result))
+      DEBUG4("CTCSS Value / Threshold / Valid", value, threshold, CTCSS_VALID(m_result));
 
     m_count = 0U;
     m_q0 = 0;
     m_q1 = 0;
   }
 
-  return m_state;
+  return m_result;
 }
 
 void CFMCTCSSRX::reset()
 {
   m_q0 = 0;
   m_q1 = 0;
-  m_state = false;
-  m_count = 0U;
+  m_result = CTS_NONE;
+  m_count  = 0U;
 }
-
-#endif
-

FMCTCSSRX.h

@@ -16,20 +16,27 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
 #if !defined(FMCTCSSRX_H)
 #define  FMCTCSSRX_H
 
+#include "Config.h"
+
+const uint8_t CTS_NONE  = 0U;
+const uint8_t CTS_READY = 1U;
+const uint8_t CTS_VALID = 2U;
+
+#define CTCSS_READY(a) ((a & CTS_READY) != 0)
+#define CTCSS_NOT_READY(a) ((a & CTS_READY) == 0)
+#define CTCSS_VALID(a) ((a & CTS_VALID) != 0)
+#define CTCSS_NOT_VALID(a) ((a & CTS_VALID) == 0)
+
 class CFMCTCSSRX {
 public:
   CFMCTCSSRX();
 
   uint8_t setParams(uint8_t frequency, uint8_t highThreshold, uint8_t lowThreshold);
   
-  bool process(q15_t sample);
+  uint8_t process(q15_t sample);
 
   void reset();
 
@@ -40,10 +47,7 @@ private:
   uint16_t m_count;
   q31_t    m_q0;
   q31_t    m_q1;
-  bool     m_state;
+  uint8_t  m_result;
 };
 
 #endif
-
-#endif
-

FMCTCSSTX.cpp

@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_FM)
-
 #include "Globals.h"
 #include "FMCTCSSTX.h"
 
@@ -118,17 +115,11 @@ uint8_t CFMCTCSSTX::setParams(uint8_t frequency, uint8_t level)
   return 0U;
 }
 
-q15_t CFMCTCSSTX::getAudio(bool reverse)
+q15_t CFMCTCSSTX::getAudio()
 {
   q15_t sample = m_values[m_n++];
-  if (m_n >= m_length)
+  if(m_n >= m_length)
     m_n = 0U;
   
-  if (reverse)
-    return -sample;
-  else
-    return sample;
+  return sample;
 }
-
-#endif
-

FMCTCSSTX.h

@@ -16,20 +16,18 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
 #if !defined(FMCTCSSTX_H)
 #define  FMCTCSSTX_H
 
+#include "Config.h"
+
 class CFMCTCSSTX {
 public:
   CFMCTCSSTX();
 
   uint8_t setParams(uint8_t frequency, uint8_t level);
 
-  q15_t getAudio(bool reverse);
+  q15_t getAudio();
 
 private:
   q15_t*   m_values;
@@ -38,6 +36,3 @@ private:
 };
 
 #endif
-
-#endif
-

FMDirectForm1.h

@@ -29,11 +29,7 @@ THE SOFTWARE.
 
 // based on https://raw.githubusercontent.com/berndporr/iir_fixed_point/master/DirectFormI.h
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
-#include <cstdint>
+#include "Globals.h"
 
 #ifndef DIRECTFORMI_H_
 #define DIRECTFORMI_H_
@@ -42,7 +38,8 @@ class CFMDirectFormI
 public:
 
 	// convenience function which takes the a0 argument but ignores it!
-	CFMDirectFormI(const q31_t b0, const q31_t b1, const q31_t b2, const q31_t, const q31_t a1, const q31_t a2)
+	CFMDirectFormI(const q31_t b0, const q31_t b1, const q31_t b2,
+			const q31_t, const q31_t a1, const q31_t a2)
 	{
 		// FIR coefficients
 		c_b0 = b0;
@@ -56,21 +53,21 @@ public:
 
 	CFMDirectFormI(const CFMDirectFormI &my)
 	{
-		// delay line
+	// delay line
 		m_x2 = my.m_x2; // x[n-2]
 		m_y2 = my.m_y2; // y[n-2]
 		m_x1 = my.m_x1; // x[n-1]
 		m_y1 = my.m_y1; // y[n-1]
 
-		// coefficients
+	// coefficients
 		c_b0 = my.c_b0;
 		c_b1 = my.c_b1;
 		c_b2 = my.c_b2; // FIR
 		c_a1 = my.c_a1;
 		c_a2 = my.c_a2; // IIR
-	}
+    }
 
-	void reset()
+	void reset ()
 	{
 		m_x1 = 0;
 		m_x2 = 0;
@@ -82,7 +79,11 @@ public:
 	inline q15_t filter(const q15_t in)
 	{
 		// calculate the output
-		q31_t out_upscaled = c_b0 * in + c_b1 * m_x1 + c_b2 * m_x2 - c_a1 * m_y1 - c_a2 * m_y2;
+		register q31_t out_upscaled = c_b0 * in
+									+ c_b1 * m_x1
+									+ c_b2 * m_x2
+									- c_a1 * m_y1
+									- c_a2 * m_y2;
 
 		q15_t out = __SSAT(out_upscaled >> 15, 15);
 
@@ -108,6 +109,3 @@ private:
 };
 
 #endif /* DIRECTFORMI_H */
-
-#endif
-

FMDownsampleRB.cpp

@@ -1,6 +1,5 @@
 /*
  *   Copyright (C) 2020 by Jonathan Naylor G4KLX
- *   Copyright (C) 2020 by Geoffrey Merck F4FXL - KC3FRA
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,19 +16,20 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "RingBuffer.h"
 
-template <typename TDATATYPE> CRingBuffer<TDATATYPE>::CRingBuffer(uint16_t length) :
+#include "FMDownsampleRB.h"
+
+CFMDownsampleRB::CFMDownsampleRB(uint16_t length) :
 m_length(length),
 m_head(0U),
 m_tail(0U),
 m_full(false),
 m_overflow(false)
 {
-  m_buffer = new TDATATYPE[length];
+  m_samples = new uint8_t[length];
 }
 
-template <typename TDATATYPE> uint16_t CRingBuffer<TDATATYPE>::getSpace() const
+uint16_t CFMDownsampleRB::getSpace() const
 {
   uint16_t n = 0U;
 
@@ -46,7 +46,7 @@ template <typename TDATATYPE> uint16_t CRingBuffer<TDATATYPE>::getSpace() const
   return n;
 }
 
-template <typename TDATATYPE> uint16_t CRingBuffer<TDATATYPE>::getData() const
+uint16_t CFMDownsampleRB::getData() const
 {
   if (m_tail == m_head)
     return m_full ? m_length : 0U;
@@ -56,14 +56,14 @@ template <typename TDATATYPE> uint16_t CRingBuffer<TDATATYPE>::getData() const
     return m_length - m_tail + m_head;
 }
 
-template <typename TDATATYPE> bool CRingBuffer<TDATATYPE>::put(TDATATYPE item) volatile
+bool CFMDownsampleRB::put(uint8_t sample)
 {
   if (m_full) {
     m_overflow = true;
     return false;
   }
 
-  m_buffer[m_head] = item;
+  m_samples[m_head] = sample;
 
   m_head++;
   if (m_head >= m_length)
@@ -75,17 +75,12 @@ template <typename TDATATYPE> bool CRingBuffer<TDATATYPE>::put(TDATATYPE item) v
   return true;
 }
 
-template <typename TDATATYPE> TDATATYPE CRingBuffer<TDATATYPE>::peek() const
-{
-  return m_buffer[m_tail];
-}
-
-template <typename TDATATYPE> bool CRingBuffer<TDATATYPE>::get(TDATATYPE& item) volatile
+bool CFMDownsampleRB::get(uint8_t& sample)
 {
   if (m_head == m_tail && !m_full)
     return false;
 
-  item = m_buffer[m_tail];
+  sample = m_samples[m_tail];
 
   m_full = false;
 
@@ -96,7 +91,7 @@ template <typename TDATATYPE> bool CRingBuffer<TDATATYPE>::get(TDATATYPE& item)
   return true;
 }
 
-template <typename TDATATYPE> bool CRingBuffer<TDATATYPE>::hasOverflowed()
+bool CFMDownsampleRB::hasOverflowed()
 {
   bool overflow = m_overflow;
 
@@ -104,11 +99,3 @@ template <typename TDATATYPE> bool CRingBuffer<TDATATYPE>::hasOverflowed()
 
   return overflow;
 }
-
-template <typename TDATATYPE> void CRingBuffer<TDATATYPE>::reset()
-{
-  m_head = 0U;
-  m_tail = 0U;
-  m_full     = false;
-  m_overflow = false;
-}

FMDownsampleRB.h

@@ -1,6 +1,5 @@
 /*
- *   Copyright (C) 2020,2024 by Jonathan Naylor G4KLX
- *   Copyright (C) 2020 by Geoffrey Merck F4FXL - KC3FRA
+ *   Copyright (C) 2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,42 +16,53 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#if !defined(RINGBUFFER_H)
-#define  RINGBUFFER_H
+#if !defined(FMDOWNSAMPLERB_H)
+#define  FMDOWNSAMPLERB_H
 
+#if defined(STM32F4XX)
+#include "stm32f4xx.h"
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
+#elif defined(STM32F105xC)
+#include "stm32f1xx.h"
+#include <cstddef>
+#else
 #include <Arduino.h>
-#undef PI
+#endif
+
+#if defined(__SAM3X8E__) || defined(STM32F105xC)
+#define  ARM_MATH_CM3
+#elif defined(STM32F7XX)
+#define  ARM_MATH_CM7
+#elif defined(STM32F4XX) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
+#define  ARM_MATH_CM4
+#else
+#error "Unknown processor type"
+#endif
 
 #include <arm_math.h>
 
-template <typename TDATATYPE>
-class CRingBuffer {
+class CFMDownsampleRB {
 public:
-  CRingBuffer(uint16_t length = 370U);
+  CFMDownsampleRB(uint16_t length);
   
   uint16_t getSpace() const;
   
   uint16_t getData() const;
 
-  bool put(TDATATYPE item) volatile;
+  bool put(uint8_t sample);
 
-  bool get(TDATATYPE& item) volatile;
-
-  TDATATYPE peek() const;
+  bool get(uint8_t& sample);
 
   bool hasOverflowed();
 
-  void reset();
-
 private:
-  uint16_t              m_length;
-  TDATATYPE*            m_buffer;
-  volatile uint16_t     m_head;
-  volatile uint16_t     m_tail;
-  volatile bool         m_full;
-  bool                  m_overflow;
+  uint16_t          m_length;
+  volatile uint8_t* m_samples;
+  volatile uint16_t m_head;
+  volatile uint16_t m_tail;
+  volatile bool     m_full;
+  bool              m_overflow;
 };
 
-#include "RingBuffer.impl.h"
-
 #endif

FMDownsampler.cpp

@@ -0,0 +1,63 @@
+/*
+ *   Copyright (C) 2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2020 by Geoffrey Merck F4FXL - KC3FRA
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+#include "FMDownsampler.h"
+
+
+CFMDownsampler::CFMDownsampler(uint16_t length) :
+m_ringBuffer(length),//length might need tweaking
+m_packIndex(0),
+m_downSampleIndex(0)
+{
+    m_samplePack = 0;
+}
+
+void CFMDownsampler::addSample(q15_t sample)
+{
+    //only take one of three samples
+    if(m_downSampleIndex == 0) {
+      switch(m_packIndex){
+        case 0:
+          m_samplePack = int32_t(sample) << 12;
+        break;
+        case 1:{
+            m_samplePack |= int32_t(sample);
+            
+            //we did not use MSB; skip it
+            m_ringBuffer.put(m_samplePackBytes[1]); 
+            m_ringBuffer.put(m_samplePackBytes[2]); 
+            m_ringBuffer.put(m_samplePackBytes[3]); 
+
+            m_samplePack = 0;
+        }
+        break;
+        default:
+            //should never happen
+        break;
+        }
+        m_packIndex++;
+        if(m_packIndex >= 2)
+            m_packIndex = 0;  
+    }
+
+    m_downSampleIndex++;
+    if(m_downSampleIndex >= 3)
+        m_downSampleIndex = 0;
+}

FMDownsampler.h

@@ -17,36 +17,27 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
 #if !defined(FMDOWNSAMPLER_H)
 #define FMDOWNSAMPLER_H
 
-#include "RingBuffer.h"
-#include "FMSamplePairPack.h"
+#include "Config.h"
+#include "FMDownsampleRB.h"
 
-class CFMDownSampler {
+class CFMDownsampler {
 public:
-  CFMDownSampler(uint16_t length);
-
+  CFMDownsampler(uint16_t length);
   void addSample(q15_t sample);
-
-  bool getPackedData(TSamplePairPack& data);
-
-  uint16_t getData();
-
-  void reset();
+  inline bool getPackedData(uint8_t& data){ return m_ringBuffer.get(data); };
+  inline bool hasOverflowed() { return m_ringBuffer.hasOverflowed(); };
 
 private:
-  CRingBuffer<TSamplePairPack> m_ringBuffer;
-  uint32_t                     m_samplePack;
-  uint8_t*                     m_samplePackPointer;
-  uint8_t                      m_sampleIndex;
+  CFMDownsampleRB m_ringBuffer;
+  union {
+    int32_t m_samplePack;
+    int8_t  m_samplePackBytes[4];
+  };
+  uint8_t m_packIndex;
+  uint8_t m_downSampleIndex;
 };
 
 #endif
-
-#endif
-

FMKeyer.cpp

@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_FM)
-
 #include "Globals.h"
 #include "FMKeyer.h"
 
@@ -217,6 +214,3 @@ bool CFMKeyer::isRunning() const
 {
   return m_poPos > 0U || m_dotPos > 0U || m_audioPos > 0U;
 }
-
-#endif
-

FMKeyer.h

@@ -16,13 +16,11 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
 #if !defined(FMKeyer_H)
 #define  FMKeyer_H
 
+#include "Config.h"
+
 class CFMKeyer {
 public:
   CFMKeyer();
@@ -54,6 +52,3 @@ private:
 };
 
 #endif
-
-#endif
-

FMRB.cpp

@@ -0,0 +1,110 @@
+/*
+TX fifo control - Copyright (C) KI6ZUM 2015
+Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the
+Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+Boston, MA  02110-1301, USA.
+*/
+
+#include "FMRB.h"
+
+CFMRB::CFMRB(uint16_t length) :
+m_length(length),
+m_head(0U),
+m_tail(0U),
+m_full(false),
+m_overflow(false)
+{
+  m_samples = new q15_t[length];
+}
+
+uint16_t CFMRB::getSpace() const
+{
+  uint16_t n = 0U;
+
+  if (m_tail == m_head)
+    n = m_full ? 0U : m_length;
+  else if (m_tail < m_head)
+    n = m_length - m_head + m_tail;
+  else
+    n = m_tail - m_head;
+
+  if (n > m_length)
+    n = 0U;
+
+  return n;
+}
+
+uint16_t CFMRB::getData() const
+{
+  if (m_tail == m_head)
+    return m_full ? m_length : 0U;
+  else if (m_tail < m_head)
+    return m_head - m_tail;
+  else
+    return m_length - m_tail + m_head;
+}
+
+bool CFMRB::put(q15_t sample)
+{
+  if (m_full) {
+    m_overflow = true;
+    return false;
+  }
+
+  m_samples[m_head] = sample;
+
+  m_head++;
+  if (m_head >= m_length)
+    m_head = 0U;
+
+  if (m_head == m_tail)
+    m_full = true;
+
+  return true;
+}
+
+bool CFMRB::get(q15_t& sample)
+{
+  if (m_head == m_tail && !m_full)
+    return false;
+
+  sample = m_samples[m_tail];
+
+  m_full = false;
+
+  m_tail++;
+  if (m_tail >= m_length)
+    m_tail = 0U;
+
+  return true;
+}
+
+bool CFMRB::hasOverflowed()
+{
+  bool overflow = m_overflow;
+
+  m_overflow = false;
+
+  return overflow;
+}
+
+void CFMRB::reset()
+{
+  m_head = 0U;
+  m_tail = 0U;
+  m_full     = false;
+  m_overflow = false;
+}

FMRB.h

@@ -0,0 +1,72 @@
+/*
+Serial fifo control - Copyright (C) KI6ZUM 2015
+Copyright (C) 2015,2016,2020 by Jonathan Naylor G4KLX
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the
+Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+Boston, MA  02110-1301, USA.
+*/
+
+#if !defined(FMRB_H)
+#define  FMRB_H
+
+#if defined(STM32F4XX)
+#include "stm32f4xx.h"
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
+#elif defined(STM32F105xC)
+#include "stm32f1xx.h"
+#include <cstddef>
+#else
+#include <Arduino.h>
+#endif
+
+#if defined(__SAM3X8E__) || defined(STM32F105xC)
+#define  ARM_MATH_CM3
+#elif defined(STM32F7XX)
+#define  ARM_MATH_CM7
+#elif defined(STM32F4XX) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
+#define  ARM_MATH_CM4
+#else
+#error "Unknown processor type"
+#endif
+
+#include <arm_math.h>
+
+class CFMRB {
+public:
+  CFMRB(uint16_t length);
+  
+  uint16_t getSpace() const;
+  
+  uint16_t getData() const;
+
+  bool put(q15_t sample);
+
+  bool get(q15_t& sample);
+
+  bool hasOverflowed();
+
+  void reset();
+
+private:
+  uint16_t          m_length;
+  volatile q15_t*   m_samples;
+  volatile uint16_t m_head;
+  volatile uint16_t m_tail;
+  volatile bool     m_full;
+  bool              m_overflow;
+};
+
+#endif

FMTimeout.cpp

@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_FM)
-
 #include "Globals.h"
 #include "FMTimeout.h"
 
@@ -39,22 +36,24 @@ m_n(0U)
 
 void CFMTimeout::setParams(uint8_t level)
 {
-  m_level = q15_t(level * 5);
+  m_level = q15_t(level * 128);
 }
 
 q15_t CFMTimeout::getAudio()
 {
-  q15_t sample = 0;
+  q15_t sample = 0U;
   if (!m_running)
     return sample;
 
-  if (m_pos >= 12000U) {
-    q31_t sample31 = BUSY_AUDIO[m_n] * m_level;
-    sample = q15_t(__SSAT((sample31 >> 15), 16));
+  if (m_pos > 12000U) {
+    q31_t sample = BUSY_AUDIO[m_n] * m_level;
+    sample = q15_t(__SSAT((sample >> 15), 16));
 
     m_n++;
     if (m_n >= BUSY_AUDIO_LEN)
       m_n = 0U;
+  } else {
+    sample = 0U;
   }
 
   m_pos++;
@@ -75,6 +74,3 @@ void CFMTimeout::stop()
 {
   m_running = false;
 }
-
-#endif
-

FMTimeout.h

@@ -16,13 +16,11 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
 #if !defined(FMTimeout_H)
 #define  FMTimeout_H
 
+#include "Config.h"
+
 class CFMTimeout {
 public:
   CFMTimeout();
@@ -42,6 +40,3 @@ private:
 };
 
 #endif
-
-#endif
-

FMTimer.cpp

@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_FM)
-
 #include "Globals.h"
 #include "FMTimer.h"
 
@@ -71,6 +68,3 @@ bool CFMTimer::hasExpired() const
 
   return false;
 }
-
-#endif
-

FMTimer.h

@@ -16,13 +16,11 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_FM)
-
 #if !defined(FMTimer_H)
 #define  FMTimer_H
 
+#include "Config.h"
+
 class CFMTimer {
 public:
   CFMTimer();
@@ -47,6 +45,3 @@ private:
 };
 
 #endif
-
-#endif
-

Globals.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2018,2020,2021,2024 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -19,8 +19,26 @@
 #if !defined(GLOBALS_H)
 #define  GLOBALS_H
 
+#if defined(STM32F4XX)
+#include "stm32f4xx.h"
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
+#elif defined(STM32F105xC)
+#include "stm32f1xx.h"
+#include "STM32Utils.h"
+#else
 #include <Arduino.h>
-#undef PI //Undefine PI to get rid of annoying warning as it is also defined in arm_math.h.
+#endif
+
+#if defined(__SAM3X8E__) || defined(STM32F105xC)
+#define  ARM_MATH_CM3
+#elif defined(STM32F7XX)
+#define  ARM_MATH_CM7
+#elif defined(STM32F4XX) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
+#define  ARM_MATH_CM4
+#else
+#error "Unknown processor type"
+#endif
 
 #include <arm_math.h>
 
@@ -32,9 +50,7 @@ enum MMDVM_STATE {
   STATE_P25       = 4,
   STATE_NXDN      = 5,
   STATE_POCSAG    = 6,
-  STATE_M17       = 7,
   STATE_FM        = 10,
-  STATE_AX25      = 11,
 
   // Dummy states start at 90
   STATE_NXDNCAL1K = 91,
@@ -53,43 +69,36 @@ enum MMDVM_STATE {
   STATE_FMCAL15K  = 104,
   STATE_FMCAL20K  = 105,
   STATE_FMCAL25K  = 106,
-  STATE_FMCAL30K  = 107,
-  STATE_M17CAL    = 108
+  STATE_FMCAL30K  = 107
 };
 
 #include "SerialPort.h"
-
-#include "POCSAG/CalPOCSAG.h"
-#include "DStar/CalDStarRX.h"
-#include "DStar/CalDStarTX.h"
-#include "POCSAG/POCSAGTX.h"
-#include "DStar/DStarRX.h"
-#include "DStar/DStarTX.h"
-#include "DMR/DMRIdleRX.h"
-#include "DMR/DMRDMORX.h"
-#include "DMR/DMRDMOTX.h"
-#include "NXDN/CalNXDN.h"
-#include "NXDN/NXDNRX.h"
-#include "NXDN/NXDNTX.h"
-#include "AX25/AX25RX.h"
-#include "AX25/AX25TX.h"
-#include "DMR/CalDMR.h"
-#include "P25/CalP25.h"
-#include "M17/CalM17.h"
-#include "DMR/DMRRX.h"
-#include "DMR/DMRTX.h"
-#include "YSF/YSFRX.h"
-#include "YSF/YSFTX.h"
-#include "P25/P25RX.h"
-#include "P25/P25TX.h"
-#include "M17/M17RX.h"
-#include "M17/M17TX.h"
-#include "FM/CalFM.h"
+#include "DMRIdleRX.h"
+#include "DMRDMORX.h"
+#include "DMRDMOTX.h"
+#include "DStarRX.h"
+#include "DStarTX.h"
+#include "DMRRX.h"
+#include "DMRTX.h"
+#include "YSFRX.h"
+#include "YSFTX.h"
+#include "P25RX.h"
+#include "P25TX.h"
+#include "NXDNRX.h"
+#include "NXDNTX.h"
+#include "POCSAGTX.h"
+#include "CalDStarRX.h"
+#include "CalDStarTX.h"
+#include "CalFM.h"
+#include "CalDMR.h"
+#include "CalP25.h"
+#include "CalNXDN.h"
+#include "CalPOCSAG.h"
 #include "CalRSSI.h"
 #include "CWIdTX.h"
-#include "FM/FM.h"
 #include "Debug.h"
 #include "IO.h"
+#include "FM.h"
 
 const uint8_t  MARK_SLOT1 = 0x08U;
 const uint8_t  MARK_SLOT2 = 0x04U;
@@ -100,9 +109,7 @@ const uint16_t RX_BLOCK_SIZE = 2U;
 const uint16_t TX_RINGBUFFER_SIZE = 500U;
 const uint16_t RX_RINGBUFFER_SIZE = 600U;
 
-const uint32_t SAMPLE_RATE = 24000U;
-
-#if defined(__MK20DX256__)
+#if defined(STM32F105xC) || defined(__MK20DX256__)
 const uint16_t TX_BUFFER_LEN = 2000U;
 #else
 const uint16_t TX_BUFFER_LEN = 4000U;
@@ -116,9 +123,7 @@ extern bool m_ysfEnable;
 extern bool m_p25Enable;
 extern bool m_nxdnEnable;
 extern bool m_pocsagEnable;
-extern bool m_m17Enable;
 extern bool m_fmEnable;
-extern bool m_ax25Enable;
 
 extern bool m_duplex;
 
@@ -128,15 +133,9 @@ extern bool m_dcd;
 extern CSerialPort serial;
 extern CIO io;
 
-#if defined(MODE_DSTAR)
 extern CDStarRX dstarRX;
 extern CDStarTX dstarTX;
 
-extern CCalDStarRX calDStarRX;
-extern CCalDStarTX calDStarTX;
-#endif
-
-#if defined(MODE_DMR)
 extern CDMRIdleRX dmrIdleRX;
 extern CDMRRX dmrRX;
 extern CDMRTX dmrTX;
@@ -144,53 +143,28 @@ extern CDMRTX dmrTX;
 extern CDMRDMORX dmrDMORX;
 extern CDMRDMOTX dmrDMOTX;
 
-extern CCalDMR calDMR;
-#endif
-
-#if defined(MODE_YSF)
 extern CYSFRX ysfRX;
 extern CYSFTX ysfTX;
-#endif
 
-#if defined(MODE_P25)
 extern CP25RX p25RX;
 extern CP25TX p25TX;
 
-extern CCalP25 calP25;
-#endif
-
-#if defined(MODE_NXDN)
 extern CNXDNRX nxdnRX;
 extern CNXDNTX nxdnTX;
 
-extern CCalNXDN calNXDN;
-#endif
+extern CPOCSAGTX pocsagTX;
 
-#if defined(MODE_POCSAG)
-extern CPOCSAGTX  pocsagTX;
-extern CCalPOCSAG calPOCSAG;
-#endif
+extern CFM fm;
 
-#if defined(MODE_M17)
-extern CM17RX m17RX;
-extern CM17TX m17TX;
-
-extern CCalM17 calM17;
-#endif
-
-#if defined(MODE_FM)
-extern CFM    fm;
-extern CCalFM calFM;
-#endif
-
-#if defined(MODE_AX25)
-extern CAX25RX ax25RX;
-extern CAX25TX ax25TX;
-#endif
-
-extern CCalRSSI calRSSI;
+extern CCalDStarRX calDStarRX;
+extern CCalDStarTX calDStarTX;
+extern CCalDMR     calDMR;
+extern CCalFM      calFM;
+extern CCalP25     calP25;
+extern CCalNXDN    calNXDN;
+extern CCalPOCSAG  calPOCSAG;
+extern CCalRSSI    calRSSI;
 
 extern CCWIdTX cwIdTX;
 
 #endif
-

I2CTeensy.cpp

@@ -0,0 +1,235 @@
+/*
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *   28-4-2017 Created for MMDVM Pi shield for Teensy by Chris Huitema
+ */
+
+#include "Config.h"
+#include "Globals.h"
+
+#if defined(VK6MST_TEENSY_PI3_SHIELD_I2C)
+
+#include <i2c_t3.h>   //available here https://github.com/nox771/i2c_t3 or maybe the normal wire will work #include <wire.h> justs need to test i guess
+
+#define I2C_ADDRESS   0x22
+#define I2C_SPEED     100000
+
+// Function prototypes
+void receiveEvent(size_t count);
+void requestEvent(void);
+
+#define TX_FIFO_SIZE 512U
+#define RX_FIFO_SIZE 512U
+
+volatile uint8_t  TXfifo[TX_FIFO_SIZE];
+volatile uint8_t  RXfifo[RX_FIFO_SIZE];
+volatile uint16_t TXfifohead, TXfifotail;
+volatile uint16_t RXfifohead, RXfifotail;
+
+// Init queues
+void TXfifoinit(void)
+{
+   TXfifohead = 0U;
+   TXfifotail = 0U;
+}
+
+void RXfifoinit()
+{
+   RXfifohead = 0U;
+   RXfifotail = 0U;
+}
+
+// How full is queue
+
+uint16_t TXfifolevel(void)
+{
+   uint32_t tail = TXfifotail;
+   uint32_t head = TXfifohead;
+
+   if (tail > head)
+      return TX_FIFO_SIZE + head - tail;
+   else
+      return head - tail;
+}
+
+uint16_t RXfifolevel(void)
+{
+   uint32_t tail = RXfifotail;
+   uint32_t head = RXfifohead;
+
+   if (tail > head)
+      return RX_FIFO_SIZE + head - tail;
+   else
+      return head - tail;
+}
+
+
+uint8_t TXfifoput(uint8_t next)
+{
+   if (TXfifolevel() < TX_FIFO_SIZE) {
+      TXfifo[TXfifohead] = next;
+
+      TXfifohead++;
+      if (TXfifohead >= TX_FIFO_SIZE)
+         TXfifohead = 0U;
+      return 1U;
+   } else {
+      return 0U; // signal an overflow occurred by returning a zero count
+   }
+}
+
+void I2Cbegin(void)
+{
+  // Setup for Slave mode, address 0x22, pins 18/19, external pullups, speed in hz
+  Wire.begin(I2C_SLAVE, I2C_ADDRESS, I2C_PINS_18_19, I2C_PULLUP_EXT, I2C_SPEED);
+
+    // register events
+    Wire.onReceive(receiveEvent);
+    Wire.onRequest(requestEvent);
+
+    // initialize the fifos
+    TXfifoinit();
+    RXfifoinit();
+}
+
+
+int I2Cavailable(void)
+{
+  if (RXfifolevel() > 0U)
+      return 1U;
+    else
+      return 0U;
+}
+
+
+uint8_t I2Cread(void)
+{
+  uint8_t data_c = RXfifo[RXfifotail];
+
+   RXfifotail++;
+   if (RXfifotail >= RX_FIFO_SIZE)
+      RXfifotail = 0U;
+
+   return data_c;
+}
+
+
+void I2Cwrite(const uint8_t* data, uint16_t length)
+{
+   for (uint16_t i = 0U; i < length; i++)
+      TXfifoput(data[i]);   //puts it in the fifo
+}
+
+//
+// handle Rx Event (incoming I2C data)
+//
+void receiveEvent(size_t count)
+{
+  for (uint16_t i = 0U; i < count; i++)
+  {
+    if (RXfifolevel() < RX_FIFO_SIZE) {
+      RXfifo[RXfifohead] = Wire.readByte();
+      if (RXfifo[RXfifohead] != -1){
+        RXfifohead++;
+        if (RXfifohead >= RX_FIFO_SIZE) RXfifohead = 0U;
+      }
+    } else {
+      Wire.readByte();                  // drop data if mem full.
+    }
+    
+  }
+}
+
+//
+// handle Tx Event (outgoing I2C data)
+//
+void requestEvent(void)
+{
+    if (TXfifolevel() > 0) {
+      if (Wire.write(TXfifo[TXfifotail])){  //write to i2c
+        TXfifotail++;
+        if (TXfifotail >= TX_FIFO_SIZE) TXfifotail = 0U;
+      }  
+    }
+}
+
+
+
+/************************************/
+
+void CSerialPort::beginInt(uint8_t n, int speed)
+{
+  switch (n) {
+    case 1U:
+      return I2Cbegin();
+    case 3U:
+      Serial3.begin(speed);
+      break;
+    default:
+      break;
+  }
+}
+
+int CSerialPort::availableInt(uint8_t n)
+{
+  switch (n) {
+    case 1U:
+      return I2Cavailable();
+    case 3U:
+      return Serial3.available();
+    default:
+      return false;
+  }
+}
+
+int CSerialPort::availableForWriteInt(uint8_t n)
+{
+  switch (n) {
+    case 3U:
+      return Serial3.availableForWrite();
+    default:
+      return false;
+  }
+}
+
+uint8_t CSerialPort::readInt(uint8_t n)
+{
+  switch (n) {
+    case 1U:
+      return I2Cread();
+    case 3U:
+      return Serial3.read();
+    default:
+      return 0U;
+  }
+}
+
+void CSerialPort::writeInt(uint8_t n, const uint8_t* data, uint16_t length, bool flush)
+{
+  switch (n) {
+    case 1U:
+      I2Cwrite(data, length);
+      break;
+    case 3U:
+      Serial3.write(data, length);
+      if (flush)
+        Serial3.flush();
+      break;
+    default:
+      break;
+  }
+}
+
+#endif

IO.cpp

@@ -0,0 +1,538 @@
+/*
+ *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015 by Jim Mclaughlin KI6ZUM
+ *   Copyright (C) 2016 by Colin Durbridge G4EML
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+#include "Globals.h"
+#include "IO.h"
+
+// Generated using [b, a] = butter(1, 0.001) in MATLAB
+static q31_t   DC_FILTER[] = {3367972, 0, 3367972, 0, 2140747704, 0}; // {b0, 0, b1, b2, -a1, -a2}
+const uint32_t DC_FILTER_STAGES = 1U; // One Biquad stage
+
+// One symbol boxcar filters
+static q15_t   BOXCAR5_FILTER[] = {12000, 12000, 12000, 12000, 12000, 0};
+const uint16_t BOXCAR5_FILTER_LEN = 6U;
+
+static q15_t   BOXCAR10_FILTER[] = {6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000};
+const uint16_t BOXCAR10_FILTER_LEN = 10U;
+
+const uint16_t DC_OFFSET = 2048U;
+
+CIO::CIO() :
+m_started(false),
+m_rxBuffer(RX_RINGBUFFER_SIZE),
+m_txBuffer(TX_RINGBUFFER_SIZE),
+m_rssiBuffer(RX_RINGBUFFER_SIZE),
+m_dcFilter(),
+m_dcState(),
+m_boxcar5Filter(),
+m_boxcar10Filter(),
+m_boxcar5State(),
+m_boxcar10State(),
+m_pttInvert(false),
+m_rxLevel(128 * 128),
+m_cwIdTXLevel(128 * 128),
+m_dstarTXLevel(128 * 128),
+m_dmrTXLevel(128 * 128),
+m_ysfTXLevel(128 * 128),
+m_p25TXLevel(128 * 128),
+m_nxdnTXLevel(128 * 128),
+m_pocsagTXLevel(128 * 128),
+m_fmTXLevel(128 * 128),
+m_rxDCOffset(DC_OFFSET),
+m_txDCOffset(DC_OFFSET),
+m_ledCount(0U),
+m_ledValue(true),
+m_detect(false),
+m_adcOverflow(0U),
+m_dacOverflow(0U),
+m_watchdog(0U),
+m_lockout(false)
+{
+  ::memset(m_boxcar5State,  0x00U, 30U * sizeof(q15_t));
+  ::memset(m_boxcar10State, 0x00U, 40U * sizeof(q15_t));
+  ::memset(m_dcState,       0x00U,  4U * sizeof(q31_t));
+
+  m_dcFilter.numStages = DC_FILTER_STAGES;
+  m_dcFilter.pState    = m_dcState;
+  m_dcFilter.pCoeffs   = DC_FILTER;
+  m_dcFilter.postShift = 0;
+
+  m_boxcar5Filter.numTaps = BOXCAR5_FILTER_LEN;
+  m_boxcar5Filter.pState  = m_boxcar5State;
+  m_boxcar5Filter.pCoeffs = BOXCAR5_FILTER;
+
+  m_boxcar10Filter.numTaps = BOXCAR10_FILTER_LEN;
+  m_boxcar10Filter.pState  = m_boxcar10State;
+  m_boxcar10Filter.pCoeffs = BOXCAR10_FILTER;
+
+  initInt();
+  
+  selfTest();
+}
+
+void CIO::selfTest()
+{
+  bool ledValue = false;
+
+  for (uint8_t i = 0; i < 6; i++) {
+    ledValue = !ledValue;
+
+    // We exclude PTT to avoid trigger the transmitter
+    setLEDInt(ledValue);
+    setCOSInt(ledValue);
+#if defined(MODE_LEDS)
+    setDStarInt(ledValue);
+    setDMRInt(ledValue);
+    setYSFInt(ledValue);
+    setP25Int(ledValue);
+    setNXDNInt(ledValue);
+    setPOCSAGInt(ledValue);
+    setFMInt(ledValue);
+#endif
+    delayInt(250);
+  }
+
+#if defined(MODE_LEDS)
+  setDStarInt(true);
+  setDMRInt(false);
+  setYSFInt(false);
+  setP25Int(false);
+  setNXDNInt(false);
+  setPOCSAGInt(false);
+  setFMInt(false);
+
+  delayInt(250);
+  setDMRInt(true);
+
+  delayInt(250);
+  setYSFInt(true);
+
+  delayInt(250);
+  setP25Int(true);
+
+#if !defined(USE_ALTERNATE_NXDN_LEDS)
+  delayInt(250);
+  setNXDNInt(true);
+#endif
+
+#if !defined(USE_ALTERNATE_POCSAG_LEDS)
+  delayInt(250);
+  setPOCSAGInt(true);
+#endif
+
+#if !defined(USE_ALTERNATE_FM_LEDS)
+  delayInt(250);
+  setFMInt(true);
+
+  delayInt(250);
+  setFMInt(false);
+#endif
+
+#if !defined(USE_ALTERNATE_POCSAG_LEDS)
+  delayInt(250);
+  setPOCSAGInt(false);
+#endif
+
+#if !defined(USE_ALTERNATE_NXDN_LEDS)
+  delayInt(250);
+  setNXDNInt(false);
+#endif
+
+  delayInt(250);
+  setP25Int(false);
+
+  delayInt(250);
+  setYSFInt(false);
+
+  delayInt(250);
+  setDMRInt(false);
+
+  delayInt(250);
+  setDStarInt(false);
+#endif
+}
+
+void CIO::start()
+{
+  if (m_started)
+    return;
+
+  startInt();
+
+  m_started = true;
+
+  setMode();
+}
+
+void CIO::process()
+{
+  m_ledCount++;
+  if (m_started) {
+    // Two seconds timeout
+    if (m_watchdog >= 48000U) {
+      if (m_modemState == STATE_DSTAR || m_modemState == STATE_DMR || m_modemState == STATE_YSF || m_modemState == STATE_P25 || m_modemState == STATE_NXDN || m_modemState == STATE_POCSAG) {
+        if (m_modemState == STATE_DMR && m_tx)
+          dmrTX.setStart(false);
+        m_modemState = STATE_IDLE;
+        setMode();
+      }
+
+      m_watchdog = 0U;
+    }
+
+#if defined(CONSTANT_SRV_LED)
+    setLEDInt(true);
+#else
+    if (m_ledCount >= 24000U) {
+      m_ledCount = 0U;
+      m_ledValue = !m_ledValue;
+      setLEDInt(m_ledValue);
+    }
+#endif
+  } else {
+    if (m_ledCount >= 240000U) {
+      m_ledCount = 0U;
+      m_ledValue = !m_ledValue;
+      setLEDInt(m_ledValue);
+    }
+    return;
+  }
+
+#if defined(USE_COS_AS_LOCKOUT)
+  m_lockout = getCOSInt();
+#endif
+
+  // Switch off the transmitter if needed
+  if (m_txBuffer.getData() == 0U && m_tx) {
+    m_tx = false;
+    setPTTInt(m_pttInvert ? true : false);
+  }
+
+  if (m_rxBuffer.getData() >= RX_BLOCK_SIZE) {
+    q15_t    samples[RX_BLOCK_SIZE];
+    uint8_t  control[RX_BLOCK_SIZE];
+    uint16_t rssi[RX_BLOCK_SIZE];
+
+    for (uint16_t i = 0U; i < RX_BLOCK_SIZE; i++) {
+      uint16_t sample;
+      m_rxBuffer.get(sample, control[i]);
+      m_rssiBuffer.get(rssi[i]);
+
+      // Detect ADC overflow
+      if (m_detect && (sample == 0U || sample == 4095U))
+        m_adcOverflow++;
+
+      q15_t res1 = q15_t(sample) - m_rxDCOffset;
+      q31_t res2 = res1 * m_rxLevel;
+      samples[i] = q15_t(__SSAT((res2 >> 15), 16));
+    }
+
+    if (m_lockout)
+      return;
+
+#if defined(USE_DCBLOCKER)
+    q31_t q31Samples[RX_BLOCK_SIZE];
+    ::arm_q15_to_q31(samples, q31Samples, RX_BLOCK_SIZE);
+
+    q31_t dcValues[RX_BLOCK_SIZE];
+    ::arm_biquad_cascade_df1_q31(&m_dcFilter, q31Samples, dcValues, RX_BLOCK_SIZE);
+
+    q31_t dcLevel = 0;
+    for (uint8_t i = 0U; i < RX_BLOCK_SIZE; i++)
+      dcLevel += dcValues[i];
+    dcLevel /= RX_BLOCK_SIZE;
+
+    q15_t offset = q15_t(__SSAT((dcLevel >> 16), 16));;
+
+    q15_t dcSamples[RX_BLOCK_SIZE];
+    for (uint8_t i = 0U; i < RX_BLOCK_SIZE; i++)
+      dcSamples[i] = samples[i] - offset;
+#endif
+
+    if (m_modemState == STATE_IDLE) {
+      if (m_dstarEnable || m_dmrEnable || m_ysfEnable || m_p25Enable) {
+        q15_t vals[RX_BLOCK_SIZE];
+        ::arm_fir_fast_q15(&m_boxcar5Filter, samples, vals, RX_BLOCK_SIZE);
+
+        if (m_dstarEnable)
+          dstarRX.samples(vals, rssi, RX_BLOCK_SIZE);
+
+        if (m_p25Enable)
+          p25RX.samples(vals, rssi, RX_BLOCK_SIZE);
+
+        if (m_ysfEnable)
+          ysfRX.samples(vals, rssi, RX_BLOCK_SIZE);
+
+        if (m_dmrEnable) {
+          if (m_duplex)
+            dmrIdleRX.samples(vals, RX_BLOCK_SIZE);
+          else
+            dmrDMORX.samples(vals, rssi, RX_BLOCK_SIZE);
+        }
+      }
+
+      if (m_nxdnEnable) {
+        q15_t vals[RX_BLOCK_SIZE];
+#if defined(USE_DCBLOCKER)
+        ::arm_fir_fast_q15(&m_boxcar10Filter, dcSamples, vals, RX_BLOCK_SIZE);
+#else
+        ::arm_fir_fast_q15(&m_boxcar10Filter, samples, vals, RX_BLOCK_SIZE);
+#endif
+        nxdnRX.samples(vals, rssi, RX_BLOCK_SIZE);
+      }
+
+      if (m_fmEnable) {
+        bool cos = getCOSInt();
+#if defined(USE_DCBLOCKER)
+        fm.samples(cos, dcSamples, RX_BLOCK_SIZE);
+#else
+        fm.samples(cos, samples, RX_BLOCK_SIZE);
+#endif
+      }
+    } else if (m_modemState == STATE_DSTAR) {
+      if (m_dstarEnable) {
+        q15_t vals[RX_BLOCK_SIZE];
+#if defined(USE_DCBLOCKER)
+        ::arm_fir_fast_q15(&m_boxcar5Filter, dcSamples, vals, RX_BLOCK_SIZE);
+#else
+        ::arm_fir_fast_q15(&m_boxcar5Filter, samples, vals, RX_BLOCK_SIZE);
+#endif
+
+        dstarRX.samples(vals, rssi, RX_BLOCK_SIZE);
+      }
+    } else if (m_modemState == STATE_DMR) {
+      if (m_dmrEnable) {
+        q15_t vals[RX_BLOCK_SIZE];
+        ::arm_fir_fast_q15(&m_boxcar5Filter, samples, vals, RX_BLOCK_SIZE);
+
+        if (m_duplex) {
+          // If the transmitter isn't on, use the DMR idle RX to detect the wakeup CSBKs
+          if (m_tx)
+            dmrRX.samples(vals, rssi, control, RX_BLOCK_SIZE);
+          else
+            dmrIdleRX.samples(vals, RX_BLOCK_SIZE);
+        } else {
+          dmrDMORX.samples(vals, rssi, RX_BLOCK_SIZE);
+        }
+      }
+    } else if (m_modemState == STATE_YSF) {
+      if (m_ysfEnable) {
+        q15_t vals[RX_BLOCK_SIZE];
+#if defined(USE_DCBLOCKER)
+        ::arm_fir_fast_q15(&m_boxcar5Filter, dcSamples, vals, RX_BLOCK_SIZE);
+#else
+        ::arm_fir_fast_q15(&m_boxcar5Filter, samples, vals, RX_BLOCK_SIZE);
+#endif
+        ysfRX.samples(vals, rssi, RX_BLOCK_SIZE);
+      }
+    } else if (m_modemState == STATE_P25) {
+      if (m_p25Enable) {
+        q15_t vals[RX_BLOCK_SIZE];
+#if defined(USE_DCBLOCKER)
+        ::arm_fir_fast_q15(&m_boxcar5Filter, dcSamples, vals, RX_BLOCK_SIZE);
+#else
+        ::arm_fir_fast_q15(&m_boxcar5Filter, samples, vals, RX_BLOCK_SIZE);
+#endif
+        p25RX.samples(vals, rssi, RX_BLOCK_SIZE);
+      }
+	} else if (m_modemState == STATE_NXDN) {
+      if (m_nxdnEnable) {
+        q15_t vals[RX_BLOCK_SIZE];
+#if defined(USE_DCBLOCKER)
+        ::arm_fir_fast_q15(&m_boxcar10Filter, dcSamples, vals, RX_BLOCK_SIZE);
+#else
+        ::arm_fir_fast_q15(&m_boxcar10Filter, samples, vals, RX_BLOCK_SIZE);
+#endif
+        nxdnRX.samples(vals, rssi, RX_BLOCK_SIZE);
+      }
+    } else if (m_modemState == STATE_FM) {
+      bool cos = getCOSInt();
+#if defined(USE_DCBLOCKER)
+      fm.samples(cos, dcSamples, RX_BLOCK_SIZE);
+#else
+      fm.samples(cos, samples, RX_BLOCK_SIZE);
+#endif
+    } else if (m_modemState == STATE_DSTARCAL) {
+      q15_t vals[RX_BLOCK_SIZE];
+#if defined(USE_DCBLOCKER)
+      ::arm_fir_fast_q15(&m_boxcar5Filter, dcSamples, vals, RX_BLOCK_SIZE);
+#else
+      ::arm_fir_fast_q15(&m_boxcar5Filter, samples, vals, RX_BLOCK_SIZE);
+#endif
+      calDStarRX.samples(vals, RX_BLOCK_SIZE);
+    } else if (m_modemState == STATE_RSSICAL) {
+      calRSSI.samples(rssi, RX_BLOCK_SIZE);
+    }
+  }
+}
+
+void CIO::write(MMDVM_STATE mode, q15_t* samples, uint16_t length, const uint8_t* control)
+{
+  if (!m_started)
+    return;
+
+  if (m_lockout)
+    return;
+
+  // Switch the transmitter on if needed
+  if (!m_tx) {
+    m_tx = true;
+    setPTTInt(m_pttInvert ? false : true);
+  }
+
+  q15_t txLevel = 0;
+  switch (mode) {
+    case STATE_DSTAR:
+      txLevel = m_dstarTXLevel;
+      break;
+    case STATE_DMR:
+      txLevel = m_dmrTXLevel;
+      break;
+    case STATE_YSF:
+      txLevel = m_ysfTXLevel;
+      break;
+    case STATE_P25:
+      txLevel = m_p25TXLevel;
+      break;
+    case STATE_NXDN:
+      txLevel = m_nxdnTXLevel;
+      break;
+    case STATE_POCSAG:
+      txLevel = m_pocsagTXLevel;
+      break;
+    case STATE_FM:
+      txLevel = m_fmTXLevel;
+      break;
+    default:
+      txLevel = m_cwIdTXLevel;
+      break;
+  }
+
+  for (uint16_t i = 0U; i < length; i++) {
+    q31_t res1 = samples[i] * txLevel;
+    q15_t res2 = q15_t(__SSAT((res1 >> 15), 16));
+    uint16_t res3 = uint16_t(res2 + m_txDCOffset);
+
+    // Detect DAC overflow
+    if (res3 > 4095U)
+      m_dacOverflow++;
+
+    if (control == NULL)
+      m_txBuffer.put(res3, MARK_NONE);
+    else
+      m_txBuffer.put(res3, control[i]);
+  }
+}
+
+uint16_t CIO::getSpace() const
+{
+  return m_txBuffer.getSpace();
+}
+
+void CIO::setDecode(bool dcd)
+{
+  if (dcd != m_dcd)
+    setCOSInt(dcd ? true : false);
+
+  m_dcd = dcd;
+}
+
+void CIO::setADCDetection(bool detect)
+{
+  m_detect = detect;
+}
+
+void CIO::setMode()
+{
+#if defined(MODE_LEDS)
+  setDStarInt(m_modemState == STATE_DSTAR);
+  setDMRInt(m_modemState   == STATE_DMR);
+  setYSFInt(m_modemState   == STATE_YSF);
+  setP25Int(m_modemState   == STATE_P25);
+  setNXDNInt(m_modemState  == STATE_NXDN);
+  setPOCSAGInt(m_modemState  == STATE_POCSAG);
+  setFMInt(m_modemState == STATE_FM);
+#endif
+}
+
+void CIO::setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rxLevel, uint8_t cwIdTXLevel, uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, uint8_t nxdnTXLevel, uint8_t pocsagTXLevel, uint8_t fmTXLevel, int16_t txDCOffset, int16_t rxDCOffset)
+{
+  m_pttInvert = pttInvert;
+
+  m_rxLevel       = q15_t(rxLevel * 128);
+  m_cwIdTXLevel   = q15_t(cwIdTXLevel * 128);
+  m_dstarTXLevel  = q15_t(dstarTXLevel * 128);
+  m_dmrTXLevel    = q15_t(dmrTXLevel * 128);
+  m_ysfTXLevel    = q15_t(ysfTXLevel * 128);
+  m_p25TXLevel    = q15_t(p25TXLevel * 128);
+  m_nxdnTXLevel   = q15_t(nxdnTXLevel * 128);
+  m_pocsagTXLevel = q15_t(pocsagTXLevel * 128);
+  m_fmTXLevel     = q15_t(fmTXLevel * 128);
+
+  m_rxDCOffset   = DC_OFFSET + rxDCOffset;
+  m_txDCOffset   = DC_OFFSET + txDCOffset;
+  
+  if (rxInvert)
+    m_rxLevel = -m_rxLevel;
+  
+  if (txInvert) {
+    m_dstarTXLevel  = -m_dstarTXLevel;
+    m_dmrTXLevel    = -m_dmrTXLevel;
+    m_ysfTXLevel    = -m_ysfTXLevel;
+    m_p25TXLevel    = -m_p25TXLevel;
+    m_nxdnTXLevel   = -m_nxdnTXLevel;
+    m_pocsagTXLevel = -m_pocsagTXLevel;
+  }
+}
+
+void CIO::getOverflow(bool& adcOverflow, bool& dacOverflow)
+{
+  adcOverflow = m_adcOverflow > 0U;
+  dacOverflow = m_dacOverflow > 0U;
+
+  m_adcOverflow = 0U;
+  m_dacOverflow = 0U;
+}
+
+bool CIO::hasTXOverflow()
+{
+  return m_txBuffer.hasOverflowed();
+}
+
+bool CIO::hasRXOverflow()
+{
+  return m_rxBuffer.hasOverflowed();
+}
+
+void CIO::resetWatchdog()
+{
+  m_watchdog = 0U;
+}
+
+uint32_t CIO::getWatchdog()
+{
+  return m_watchdog;
+}
+
+bool CIO::hasLockout() const
+{
+  return m_lockout;
+}

IO.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2018,2020,2021,2024 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -21,12 +21,8 @@
 
 #include "Globals.h"
 
-#include "RingBuffer.h"
-
-struct TSample {
-  volatile uint16_t sample;
-  volatile uint8_t control;
-};
+#include "SampleRB.h"
+#include "RSSIRB.h"
 
 class CIO {
 public:
@@ -42,11 +38,11 @@ public:
 
   void setDecode(bool dcd);
   void setADCDetection(bool detect);
-  void setMode(MMDVM_STATE state);
+  void setMode();
   
   void interrupt();
 
-  void setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rxLevel, uint8_t cwIdTXLevel, uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, uint8_t nxdnTXLevel, uint8_t m17TXLevel, uint8_t pocsagTXLevel, uint8_t fmTXLevel, uint8_t ax25TXLevel, int16_t txDCOffset, int16_t rxDCOffset, bool useCOSAsLockout);
+  void setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rxLevel, uint8_t cwIdTXLevel, uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, uint8_t nxdnTXLevel, uint8_t pocsagTXLevel, uint8_t fmTXLevel, int16_t txDCOffset, int16_t rxDCOffset);
 
   void getOverflow(bool& adcOverflow, bool& dacOverflow);
 
@@ -61,55 +57,19 @@ public:
   void selfTest();
 
 private:
-  HardwareTimer         m_timer;
+  bool                 m_started;
 
-  bool                  m_started;
+  CSampleRB            m_rxBuffer;
+  CSampleRB            m_txBuffer;
+  CRSSIRB              m_rssiBuffer;
 
-  CRingBuffer<TSample>  m_rxBuffer;
-  CRingBuffer<TSample>  m_txBuffer;
-  CRingBuffer<uint16_t> m_rssiBuffer;
-
-#if defined(USE_DCBLOCKER)
   arm_biquad_casd_df1_inst_q31 m_dcFilter;
   q31_t                        m_dcState[4];
-#endif
 
-#if defined(MODE_DSTAR)
-  arm_fir_instance_q15 m_gaussianFilter;
-  q15_t                m_gaussianState[40U];      // NoTaps + BlockSize - 1, 12 + 20 - 1 plus some spare
-#endif
-
-#if defined(MODE_DMR)
-  arm_fir_instance_q15 m_rrc02Filter1;
-  q15_t                m_rrc02State1[70U];         // NoTaps + BlockSize - 1, 42 + 20 - 1 plus some spare
-#endif
-
-#if defined(MODE_YSF)
-  arm_fir_instance_q15 m_rrc02Filter2;
-  q15_t                m_rrc02State2[70U];         // NoTaps + BlockSize - 1, 42 + 20 - 1 plus some spare
-#endif
-
-#if defined(MODE_P25)
   arm_fir_instance_q15 m_boxcar5Filter;
-  q15_t                m_boxcar5State[30U];        // NoTaps + BlockSize - 1,  6 + 20 - 1 plus some spare
-#endif
-
-#if defined(MODE_NXDN)
-#if defined(USE_NXDN_BOXCAR)
   arm_fir_instance_q15 m_boxcar10Filter;
-  q15_t                m_boxcar10State[40U];      // NoTaps + BlockSize - 1, 10 + 20 - 1 plus some spare
-#else
-  arm_fir_instance_q15 m_nxdnFilter;
-  arm_fir_instance_q15 m_nxdnISincFilter;
-  q15_t                m_nxdnState[110U];         // NoTaps + BlockSize - 1, 82 + 20 - 1 plus some spare
-  q15_t                m_nxdnISincState[60U];     // NoTaps + BlockSize - 1, 32 + 20 - 1 plus some spare
-#endif
-#endif
-
-#if defined(MODE_M17)
-  arm_fir_instance_q15 m_rrc05Filter;
-  q15_t                m_rrc05State[70U];         // NoTaps + BlockSize - 1, 42 + 20 - 1 plus some spare
-#endif
+  q15_t                m_boxcar5State[30U];        // NoTaps + BlockSize - 1, 6 + 20 - 1 plus some spare
+  q15_t                m_boxcar10State[40U];       // NoTaps + BlockSize - 1, 10 + 20 - 1 plus some spare
 
   bool                 m_pttInvert;
   q15_t                m_rxLevel;
@@ -119,16 +79,12 @@ private:
   q15_t                m_ysfTXLevel;
   q15_t                m_p25TXLevel;
   q15_t                m_nxdnTXLevel;
-  q15_t                m_m17TXLevel;
   q15_t                m_pocsagTXLevel;
   q15_t                m_fmTXLevel;
-  q15_t                m_ax25TXLevel;
 
   uint16_t             m_rxDCOffset;
   uint16_t             m_txDCOffset;
 
-  bool                 m_useCOSAsLockout;
-
   uint32_t             m_ledCount;
   bool                 m_ledValue;
 
@@ -141,24 +97,25 @@ private:
 
   bool                 m_lockout;
 
-  // Hardware access routines
-  void initHardware();
-  void startHardware();
+  // Hardware specific routines
+  void initInt();
+  void startInt();
 
-  bool getCOS();
+  bool getCOSInt();
 
-  void setLED(bool on);
-  void setPTT(bool on);
-  void setCOS(bool on);
+  void setLEDInt(bool on);
+  void setPTTInt(bool on);
+  void setCOSInt(bool on);
 
-  void setDStar(bool on);
-  void setDMR(bool on);
-  void setYSF(bool on);
-  void setP25(bool on);
-  void setNXDN(bool on);
-  void setPOCSAG(bool on);
-  void setM17(bool on);
-  void setFM(bool on);
+  void setDStarInt(bool on);
+  void setDMRInt(bool on);
+  void setYSFInt(bool on);
+  void setP25Int(bool on);
+  void setNXDNInt(bool on);
+  void setPOCSAGInt(bool on);
+  void setFMInt(bool on);
+  
+  void delayInt(unsigned int dly);
 };
 
 #endif

IODue.cpp

@@ -0,0 +1,282 @@
+/*
+ *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015 by Jim Mclaughlin KI6ZUM
+ *   Copyright (C) 2016 by Colin Durbridge G4EML
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+#include "Globals.h"
+#include "IO.h"
+
+#if defined(__SAM3X8E__)
+
+// An Arduino Due
+#if defined(ARDUINO_DUE_PAPA)
+#define PIN_COS                7
+#define PIN_PTT                8
+#define PIN_COSLED             11
+#define PIN_DSTAR              16
+#define PIN_DMR                17
+#define PIN_YSF                18
+#define PIN_P25                19
+#define PIN_NXDN               20
+#define PIN_POCSAG             4
+#define PIN_FM                 5
+#define ADC_CHER_Chan          (1<<7)                 // ADC on Due pin A0  - Due AD7 - (1 << 7)
+#define ADC_ISR_EOC_Chan       ADC_ISR_EOC7
+#define ADC_CDR_Chan           7
+#define DACC_MR_USER_SEL_Chan  DACC_MR_USER_SEL_CHANNEL0 // DAC on Due DAC0
+#define DACC_CHER_Chan         DACC_CHER_CH0
+#elif defined(ARDUINO_DUE_ZUM_V10)
+#define PIN_COS                52
+#define PIN_PTT                23
+#define PIN_COSLED             22
+#define PIN_DSTAR              9
+#define PIN_DMR                8
+#define PIN_YSF                7
+#define PIN_P25                6
+#define PIN_NXDN               5
+#define PIN_POCSAG             4
+#define PIN_FM                 3
+#define ADC_CHER_Chan          (1<<13)                // ADC on Due pin A11 - Due AD13 - (1 << 13)
+#define ADC_ISR_EOC_Chan       ADC_ISR_EOC13
+#define ADC_CDR_Chan           13
+#define DACC_MR_USER_SEL_Chan  DACC_MR_USER_SEL_CHANNEL1 // DAC on Due DAC1
+#define DACC_CHER_Chan         DACC_CHER_CH1
+#define RSSI_CHER_Chan         (1<<1)                 // ADC on Due pin A6  - Due AD1 - (1 << 1)
+#define RSSI_CDR_Chan          1
+#elif defined(ARDUINO_DUE_NTH)
+#define PIN_COS                A7
+#define PIN_PTT                A8
+#define PIN_COSLED             A11
+#define PIN_DSTAR              9
+#define PIN_DMR                8
+#define PIN_YSF                7
+#define PIN_P25                6
+#define PIN_NXDN               5
+#define PIN_POCSAG             4
+#define PIN_FM                 3
+#define ADC_CHER_Chan          (1<<7)                 // ADC on Due pin A0  - Due AD7 - (1 << 7)
+#define ADC_ISR_EOC_Chan       ADC_ISR_EOC7
+#define ADC_CDR_Chan           7
+#define DACC_MR_USER_SEL_Chan  DACC_MR_USER_SEL_CHANNEL0 // DAC on Due DAC0
+#define DACC_CHER_Chan         DACC_CHER_CH0
+#define RSSI_CHER_Chan         (1<<1)                 // ADC on Due pin A6  - Due AD1 - (1 << 1)
+#define RSSI_CDR_Chan          1
+#else
+#error "Either ARDUINO_DUE_PAPA, ARDUINO_DUE_ZUM_V10, or ARDUINO_DUE_NTH need to be defined"
+#endif
+
+const uint16_t DC_OFFSET = 2048U;
+
+extern "C" {
+  void ADC_Handler()
+  {
+    io.interrupt();
+  }
+}
+
+void CIO::initInt()
+{
+  // Set up the TX, COS and LED pins
+  pinMode(PIN_PTT,    OUTPUT);
+  pinMode(PIN_COSLED, OUTPUT);
+  pinMode(PIN_LED,    OUTPUT);
+  pinMode(PIN_COS,    INPUT);
+
+#if defined(MODE_LEDS)
+  // Set up the mode output pins
+  pinMode(PIN_DSTAR,  OUTPUT);
+  pinMode(PIN_DMR,    OUTPUT);
+  pinMode(PIN_YSF,    OUTPUT);
+  pinMode(PIN_P25,    OUTPUT);
+#if !defined(USE_ALTERNATE_NXDN_LEDS)
+  pinMode(PIN_NXDN,   OUTPUT);
+#endif
+#if !defined(USE_ALTERNATE_POCSAG_LEDS)
+  pinMode(PIN_POCSAG, OUTPUT);
+#endif
+#if !defined(USE_ALTERNATE_POCSAG_LEDS)
+  pinMode(PIN_FM,     OUTPUT);
+#endif
+#endif
+}
+
+void CIO::startInt()
+{
+  if (ADC->ADC_ISR & ADC_ISR_EOC_Chan)        // Ensure there was an End-of-Conversion and we read the ISR reg
+    io.interrupt();
+
+  // Set up the ADC
+  NVIC_EnableIRQ(ADC_IRQn);                   // Enable ADC interrupt vector
+  ADC->ADC_IDR  = 0xFFFFFFFF;                 // Disable interrupts
+  ADC->ADC_IER  = ADC_CHER_Chan;              // Enable End-Of-Conv interrupt
+  ADC->ADC_CHDR = 0xFFFF;                     // Disable all channels
+  ADC->ADC_CHER = ADC_CHER_Chan;              // Enable rx input channel
+#if defined(SEND_RSSI_DATA)
+  ADC->ADC_CHER |= RSSI_CHER_Chan;            // and RSSI input
+#endif
+  ADC->ADC_CGR  = 0x15555555;                 // All gains set to x1
+  ADC->ADC_COR  = 0x00000000;                 // All offsets off
+  ADC->ADC_MR   = (ADC->ADC_MR & 0xFFFFFFF0) | (1 << 1) | ADC_MR_TRGEN;  // 1 = trig source TIO from TC0
+
+#if defined(EXTERNAL_OSC)
+  // Set up the external clock input on PA4 = AI5
+  REG_PIOA_ODR   = 0x10;                      // Set pin as input
+  REG_PIOA_PDR   = 0x10;                      // Disable PIO A bit 4
+  REG_PIOA_ABSR &= ~0x10;                     // Select A peripheral = TCLK1 Input
+#endif
+
+  // Set up the timer
+  pmc_enable_periph_clk(TC_INTERFACE_ID + 0*3+0) ;  // Clock the TC0 channel 0
+  TcChannel* t = &(TC0->TC_CHANNEL)[0];       // Pointer to TC0 registers for its channel 0
+  t->TC_CCR = TC_CCR_CLKDIS;                  // Disable internal clocking while setup regs
+  t->TC_IDR = 0xFFFFFFFF;                     // Disable interrupts
+  t->TC_SR;                                   // Read int status reg to clear pending
+#if defined(EXTERNAL_OSC)
+  t->TC_CMR = TC_CMR_TCCLKS_XC1 |             // Use XC1 = TCLK1 external clock
+#else
+  t->TC_CMR = TC_CMR_TCCLKS_TIMER_CLOCK1 |    // Use TCLK1 (prescale by 2, = 42MHz)
+#endif
+    TC_CMR_WAVE |                             // Waveform mode
+    TC_CMR_WAVSEL_UP_RC |                     // Count-up PWM using RC as threshold
+    TC_CMR_EEVT_XC0 |                         // Set external events from XC0 (this setup TIOB as output)
+    TC_CMR_ACPA_CLEAR | TC_CMR_ACPC_CLEAR |
+    TC_CMR_BCPB_CLEAR | TC_CMR_BCPC_CLEAR;
+#if defined(EXTERNAL_OSC)
+  t->TC_RC  = EXTERNAL_OSC / 24000;           // Counter resets on RC, so sets period in terms of the external clock
+  t->TC_RA  = EXTERNAL_OSC / 48000;           // Roughly square wave
+#else
+  t->TC_RC  = 1750;                           // Counter resets on RC, so sets period in terms of 42MHz internal clock
+  t->TC_RA  = 880;                            // Roughly square wave
+#endif
+  t->TC_CMR = (t->TC_CMR & 0xFFF0FFFF) | TC_CMR_ACPA_CLEAR | TC_CMR_ACPC_SET;  // Set clear and set from RA and RC compares
+  t->TC_CCR = TC_CCR_CLKEN | TC_CCR_SWTRG;    // re-enable local clocking and switch to hardware trigger source.
+
+  // Set up the DAC
+  pmc_enable_periph_clk(DACC_INTERFACE_ID);   // Start clocking DAC
+  DACC->DACC_CR = DACC_CR_SWRST;              // Reset DAC
+  DACC->DACC_MR =
+    DACC_MR_TRGEN_EN | DACC_MR_TRGSEL(1) |    // Trigger 1 = TIO output of TC0
+    DACC_MR_USER_SEL_Chan |                   // Select channel
+    (24 << DACC_MR_STARTUP_Pos);              // 24 = 1536 cycles which I think is in range 23..45us since DAC clock = 42MHz
+  DACC->DACC_IDR  = 0xFFFFFFFF;               // No interrupts
+  DACC->DACC_CHER = DACC_CHER_Chan;           // Enable channel
+
+  digitalWrite(PIN_PTT, m_pttInvert ? HIGH : LOW);
+  digitalWrite(PIN_COSLED, LOW);
+  digitalWrite(PIN_LED,    HIGH);
+}
+
+void CIO::interrupt()
+{
+  if ((ADC->ADC_ISR & ADC_ISR_EOC_Chan) == ADC_ISR_EOC_Chan) {    // Ensure there was an End-of-Conversion and we read the ISR reg
+    uint8_t control = MARK_NONE;
+    uint16_t sample = DC_OFFSET;
+
+    m_txBuffer.get(sample, control);
+    DACC->DACC_CDR = sample;
+
+    sample = ADC->ADC_CDR[ADC_CDR_Chan];
+    m_rxBuffer.put(sample, control);
+
+#if defined(SEND_RSSI_DATA)
+    m_rssiBuffer.put(ADC->ADC_CDR[RSSI_CDR_Chan]);
+#else
+    m_rssiBuffer.put(0U);
+#endif
+
+    m_watchdog++;
+  }
+}
+
+bool CIO::getCOSInt()
+{
+  return digitalRead(PIN_COS) == HIGH;
+}
+
+void CIO::setLEDInt(bool on)
+{
+  digitalWrite(PIN_LED, on ? HIGH : LOW);
+}
+
+void CIO::setPTTInt(bool on)
+{
+  digitalWrite(PIN_PTT, on ? HIGH : LOW);
+}
+
+void CIO::setCOSInt(bool on)
+{
+  digitalWrite(PIN_COSLED, on ? HIGH : LOW);
+}
+
+void CIO::setDStarInt(bool on)
+{
+  digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
+}
+
+void CIO::setDMRInt(bool on)
+{
+  digitalWrite(PIN_DMR, on ? HIGH : LOW);
+}
+
+void CIO::setYSFInt(bool on)
+{
+  digitalWrite(PIN_YSF, on ? HIGH : LOW);
+}
+
+void CIO::setP25Int(bool on)
+{
+  digitalWrite(PIN_P25, on ? HIGH : LOW);
+}
+
+void CIO::setNXDNInt(bool on)
+{
+#if defined(USE_ALTERNATE_NXDN_LEDS)
+  digitalWrite(PIN_YSF, on ? HIGH : LOW);
+  digitalWrite(PIN_P25, on ? HIGH : LOW);
+#else
+  digitalWrite(PIN_NXDN, on ? HIGH : LOW);
+#endif
+}
+
+void CIO::setPOCSAGInt(bool on)
+{
+#if defined(USE_ALTERNATE_POCSAG_LEDS)
+  digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
+  digitalWrite(PIN_DMR,   on ? HIGH : LOW);
+#else
+  digitalWrite(PIN_POCSAG, on ? HIGH : LOW);
+#endif
+}
+
+void CIO::setFMInt(bool on)
+{
+#if defined(USE_ALTERNATE_FM_LEDS)
+  digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
+  digitalWrite(PIN_YSF,   on ? HIGH : LOW);
+#else
+  digitalWrite(PIN_FM, on ? HIGH : LOW);
+#endif
+}
+
+void CIO::delayInt(unsigned int dly)
+{
+  delay(dly);
+}
+
+#endif

IOPins.h

@@ -0,0 +1,70 @@
+/*
+ *   Copyright (C) 2019,2020 by BG5HHP
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _IO_PINS_H
+#define _IO_PINS_H
+
+#if !defined(CONFIG_H)
+#error "Requires Config.h to be included first!"
+#endif
+
+#if defined(STM32F4_RPT_HAT_TGO)
+    #include "pins/pins_f4_rpt_tgo.h"
+
+#elif defined(STM32F4_DISCOVERY)
+    #include "pins/pins_f4_discovery.h"
+
+#elif defined(STM32F4_PI)
+    #include "pins/pins_f4_pi.h"
+
+#elif defined(STM32F722_PI)
+    #include "pins/pins_f7_pi.h"
+
+#elif defined(STM32F4_F4M)
+    #include "pins/pins_f4_f4m.h"
+
+#elif defined(STM32F722_F7M)
+    #include "pins/pins_f7_f7m.h"
+
+#elif defined(STM32F722_RPT_HAT)
+    #include "pins/pins_f7_rpt_hat.h"
+
+#elif defined(STM32F4_NUCLEO)
+    #if defined(STM32F4_NUCLEO_MORPHO_HEADER)
+        #include "pins/pins_f4_nucleo_morpho.h"
+    #elif defined(STM32F4_NUCLEO_ARDUINO_HEADER)
+        #include "pins/pins_f4_nucleo_arduino.h"
+    #else
+        #error "Either STM32F4_NUCLEO_MORPHO_HEADER or STM32F4_NUCLEO_ARDUINO_HEADER need to be defined"
+    #endif
+
+#elif defined(STM32F7_NUCLEO)
+    #include "pins/pins_f7_nucleo.h"
+
+#elif defined(STM32F4_DVM)
+    #include "pins/pins_f4_stm32dvm_v3.h"
+
+#elif defined(DRCC_DVM_NQF)
+    #include "pins/pins_f4_drcc_nqf.h"
+
+#else
+    #error "A valid board type macro need to be defined."
+
+#endif
+
+#endif  //#ifndef _IO_PINS_H

IOSTM.cpp

@@ -0,0 +1,512 @@
+/*
+ *   Copyright (C) 2016 by Jim McLaughlin KI6ZUM
+ *   Copyright (C) 2016,2017,2018 by Andy Uribe CA6JAU
+ *   Copyright (C) 2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2019,2020 by BG5HHP
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+#include "Globals.h"
+#include "IO.h"
+
+#if defined(STM32F4XX) || defined(STM32F7XX)
+#include "IOPins.h"
+
+
+const uint16_t DC_OFFSET = 2048U;
+
+// Sampling frequency
+#define SAMP_FREQ   24000
+
+extern "C" {
+   void TIM2_IRQHandler() {
+      if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) {
+         TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
+         io.interrupt();
+      }
+   }
+}
+
+void CIO::initInt()
+{
+   GPIO_InitTypeDef GPIO_InitStruct;
+   GPIO_StructInit(&GPIO_InitStruct);
+   GPIO_InitStruct.GPIO_Speed = GPIO_Fast_Speed;
+   GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
+   GPIO_InitStruct.GPIO_PuPd  = GPIO_PuPd_DOWN;
+
+   // PTT pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_PTT, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_PTT;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_PTT, &GPIO_InitStruct);
+
+   // COSLED pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_COSLED, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_COSLED;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_COSLED, &GPIO_InitStruct);
+
+   // LED pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_LED, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_LED;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_LED, &GPIO_InitStruct);
+
+   // Init the input pins PIN_COS
+   RCC_AHB1PeriphClockCmd(RCC_Per_COS, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_COS;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_IN;
+   GPIO_Init(PORT_COS, &GPIO_InitStruct);
+
+#if defined(MODE_LEDS)
+   // DSTAR pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_DSTAR, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_DSTAR;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_DSTAR, &GPIO_InitStruct);
+
+   // DMR pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_DMR, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_DMR;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_DMR, &GPIO_InitStruct);
+
+   // YSF pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_YSF, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_YSF;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_YSF, &GPIO_InitStruct);
+
+   // P25 pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_P25, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_P25;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_P25, &GPIO_InitStruct);
+
+#if !defined(USE_ALTERNATE_NXDN_LEDS)
+   // NXDN pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_NXDN, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_NXDN;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_NXDN, &GPIO_InitStruct);
+#endif
+
+#if !defined(USE_ALTERNATE_POCSAG_LEDS)
+   // POCSAG pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_POCSAG, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_POCSAG;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_POCSAG, &GPIO_InitStruct);
+#endif
+
+#if !defined(USE_ALTERNATE_FM_LEDS)
+   // FM pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_FM, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_FM;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_FM, &GPIO_InitStruct);
+#endif
+
+#endif
+
+#if defined(MODE_PINS) && defined(STM32F4_NUCLEO_MORPHO_HEADER) && (defined(STM32F4_NUCLEO) || defined(STM32F722_RPT_HAT))
+   // DSTAR mode pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_MDSTAR, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_MDSTAR;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_MDSTAR, &GPIO_InitStruct);
+
+   // DMR mode pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_MDMR, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_MDMR;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_MDMR, &GPIO_InitStruct);
+
+   // YSF mode pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_MYSF, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_MYSF;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_MYSF, &GPIO_InitStruct);
+
+   // P25 mode pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_MP25, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_MP25;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_MP25, &GPIO_InitStruct);
+
+#if !defined(USE_ALTERNATE_NXDN_LEDS)
+   // NXDN mode pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_MNXDN, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_MNXDN;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_MNXDN, &GPIO_InitStruct);
+#endif
+
+#if !defined(USE_ALTERNATE_POCSAG_LEDS)
+   // POCSAG mode pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_MPOCSAG, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_MPOCSAG;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_MPOCSAG, &GPIO_InitStruct);
+#endif
+
+#if !defined(USE_ALTERNATE_FM_LEDS)
+   // FM mode pin
+   RCC_AHB1PeriphClockCmd(RCC_Per_MFM, ENABLE);
+   GPIO_InitStruct.GPIO_Pin   = PIN_MFM;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_OUT;
+   GPIO_Init(PORT_MFM, &GPIO_InitStruct);
+#endif
+
+#endif
+}
+
+void CIO::startInt()
+{
+   if ((ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) != RESET))
+      io.interrupt();
+
+   // Init the ADC
+   GPIO_InitTypeDef        GPIO_InitStruct;
+   ADC_InitTypeDef         ADC_InitStructure;
+   ADC_CommonInitTypeDef   ADC_CommonInitStructure;
+
+   GPIO_StructInit(&GPIO_InitStruct);
+   ADC_CommonStructInit(&ADC_CommonInitStructure);
+   ADC_StructInit(&ADC_InitStructure);
+
+   // Enable ADC1 clock
+   RCC_AHB1PeriphClockCmd(RCC_Per_RX, ENABLE);
+   RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
+   // Enable ADC1 GPIO
+   GPIO_InitStruct.GPIO_Pin  = PIN_RX;
+   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
+   GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL ;
+   GPIO_Init(PORT_RX, &GPIO_InitStruct);
+
+#if defined(SEND_RSSI_DATA)
+   // Enable ADC2 clock
+   RCC_AHB1PeriphClockCmd(RCC_Per_RSSI, ENABLE);
+   RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC2, ENABLE);
+   // Enable ADC2 GPIO
+   GPIO_InitStruct.GPIO_Pin  = PIN_RSSI;
+   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
+   GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL ;
+   GPIO_Init(PORT_RSSI, &GPIO_InitStruct);
+#endif
+
+   // Init ADCs in dual mode (RSSI), div clock by two
+#if defined(SEND_RSSI_DATA)
+   ADC_CommonInitStructure.ADC_Mode             = ADC_DualMode_RegSimult;
+#else
+   ADC_CommonInitStructure.ADC_Mode             = ADC_Mode_Independent;
+#endif
+   ADC_CommonInitStructure.ADC_Prescaler        = ADC_Prescaler_Div2;
+   ADC_CommonInitStructure.ADC_DMAAccessMode    = ADC_DMAAccessMode_Disabled;
+   ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
+   ADC_CommonInit(&ADC_CommonInitStructure);
+
+   // Init ADC1 and ADC2: 12bit, single-conversion
+   ADC_InitStructure.ADC_Resolution           = ADC_Resolution_12b;
+   ADC_InitStructure.ADC_ScanConvMode         = DISABLE;
+   ADC_InitStructure.ADC_ContinuousConvMode   = DISABLE;
+   ADC_InitStructure.ADC_ExternalTrigConvEdge = 0;
+   ADC_InitStructure.ADC_ExternalTrigConv     = 0;
+   ADC_InitStructure.ADC_DataAlign            = ADC_DataAlign_Right;
+   ADC_InitStructure.ADC_NbrOfConversion      = 1;
+
+   ADC_Init(ADC1, &ADC_InitStructure);
+
+   ADC_EOCOnEachRegularChannelCmd(ADC1, ENABLE);
+   ADC_RegularChannelConfig(ADC1, PIN_RX_CH, 1, ADC_SampleTime_3Cycles);
+
+   // Enable ADC1
+   ADC_Cmd(ADC1, ENABLE);
+
+#if defined(SEND_RSSI_DATA)
+   ADC_Init(ADC2, &ADC_InitStructure);
+
+   ADC_EOCOnEachRegularChannelCmd(ADC2, ENABLE);
+   ADC_RegularChannelConfig(ADC2, PIN_RSSI_CH, 1, ADC_SampleTime_3Cycles);
+
+   // Enable ADC2
+   ADC_Cmd(ADC2, ENABLE);
+#endif
+
+   // Init the DAC
+   DAC_InitTypeDef DAC_InitStructure;
+
+   GPIO_StructInit(&GPIO_InitStruct);
+   DAC_StructInit(&DAC_InitStructure);
+
+   // GPIOA clock enable
+   RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
+
+   // DAC Periph clock enable
+   RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
+
+   // GPIO CONFIGURATION of DAC Pin
+   GPIO_InitStruct.GPIO_Pin   = PIN_TX;
+   GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_AN;
+   GPIO_InitStruct.GPIO_PuPd  = GPIO_PuPd_NOPULL;
+   GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+   DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
+   DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
+   DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
+   DAC_Init(PIN_TX_CH, &DAC_InitStructure);
+   DAC_Cmd(PIN_TX_CH, ENABLE);
+
+   // Init the timer
+   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
+
+#if defined(EXTERNAL_OSC) && !(defined(STM32F4_PI) || defined(STM32F722_PI))
+   // Configure a GPIO as external TIM2 clock source
+   GPIO_PinAFConfig(PORT_EXT_CLK, SRC_EXT_CLK, GPIO_AF_TIM2);
+   GPIO_InitStruct.GPIO_Pin = PIN_EXT_CLK;
+   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
+   GPIO_Init(PORT_EXT_CLK, &GPIO_InitStruct);
+#endif
+
+   TIM_TimeBaseInitTypeDef timerInitStructure;
+   TIM_TimeBaseStructInit (&timerInitStructure);
+
+   // TIM2 output frequency
+#if defined(EXTERNAL_OSC) && !(defined(STM32F4_PI) || defined(STM32F722_PI))
+   timerInitStructure.TIM_Prescaler = (uint16_t) ((EXTERNAL_OSC/(2*SAMP_FREQ)) - 1);
+   timerInitStructure.TIM_Period = 1;
+#else
+   timerInitStructure.TIM_Prescaler = (uint16_t) ((SystemCoreClock/(6*SAMP_FREQ)) - 1);
+   timerInitStructure.TIM_Period = 2;
+#endif
+
+   timerInitStructure.TIM_CounterMode       = TIM_CounterMode_Up;
+   timerInitStructure.TIM_ClockDivision     = TIM_CKD_DIV1;
+   timerInitStructure.TIM_RepetitionCounter = 0;
+   TIM_TimeBaseInit(TIM2, &timerInitStructure);
+
+#if defined(EXTERNAL_OSC) && !(defined(STM32F4_PI) || defined(STM32F722_PI))
+   // Enable external clock
+   TIM_ETRClockMode2Config(TIM2, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, 0x00);
+#else
+   // Enable internal clock
+   TIM_InternalClockConfig(TIM2);
+#endif
+
+   // Enable TIM2
+   TIM_Cmd(TIM2, ENABLE);
+   // Enable TIM2 interrupt
+   TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
+
+   NVIC_InitTypeDef nvicStructure;
+   nvicStructure.NVIC_IRQChannel                   = TIM2_IRQn;
+   nvicStructure.NVIC_IRQChannelPreemptionPriority = 0;
+   nvicStructure.NVIC_IRQChannelSubPriority        = 1;
+   nvicStructure.NVIC_IRQChannelCmd                = ENABLE;
+   NVIC_Init(&nvicStructure);
+
+   GPIO_ResetBits(PORT_COSLED, PIN_COSLED);
+   GPIO_SetBits(PORT_LED, PIN_LED);
+}
+
+void CIO::interrupt()
+{
+   uint8_t control  = MARK_NONE;
+   uint16_t sample  = DC_OFFSET;
+   uint16_t rawRSSI = 0U;
+
+   m_txBuffer.get(sample, control);
+
+   // Send the value to the DAC
+#if defined(STM32F4_NUCLEO) && defined(STM32F4_NUCLEO_ARDUINO_HEADER)
+   DAC_SetChannel2Data(DAC_Align_12b_R, sample);
+#else
+   DAC_SetChannel1Data(DAC_Align_12b_R, sample);
+#endif
+
+   // Read value from ADC1 and ADC2
+   if ((ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET)) {
+      // shouldn't be still in reset at this point so null the sample value?
+      sample  = 0U;
+   } else {
+      sample  = ADC_GetConversionValue(ADC1);
+#if defined(SEND_RSSI_DATA)
+      rawRSSI = ADC_GetConversionValue(ADC2);
+#endif
+   }
+
+   // trigger next ADC1
+   ADC_ClearFlag(ADC1, ADC_FLAG_EOC);
+   ADC_SoftwareStartConv(ADC1);
+
+   m_rxBuffer.put(sample, control);
+   m_rssiBuffer.put(rawRSSI);
+
+   m_watchdog++;
+}
+
+bool CIO::getCOSInt()
+{
+   return GPIO_ReadInputDataBit(PORT_COS, PIN_COS) == Bit_SET;
+}
+
+void CIO::setLEDInt(bool on)
+{
+   GPIO_WriteBit(PORT_LED, PIN_LED, on ? Bit_SET : Bit_RESET);
+}
+
+void CIO::setPTTInt(bool on)
+{
+   GPIO_WriteBit(PORT_PTT, PIN_PTT, on ? Bit_SET : Bit_RESET);
+}
+
+void CIO::setCOSInt(bool on)
+{
+   GPIO_WriteBit(PORT_COSLED, PIN_COSLED, on ? Bit_SET : Bit_RESET);
+}
+
+void CIO::setDStarInt(bool on)
+{
+#if defined(MODE_LEDS)
+   GPIO_WriteBit(PORT_DSTAR, PIN_DSTAR, on ? Bit_SET : Bit_RESET);
+#endif
+#if defined(MODE_PINS) && defined(STM32F4_NUCLEO_MORPHO_HEADER) && (defined(STM32F4_NUCLEO) || defined(STM32F722_RPT_HAT))
+   GPIO_WriteBit(PORT_MDSTAR, PIN_MDSTAR, on ? Bit_SET : Bit_RESET);
+#endif
+}
+
+void CIO::setDMRInt(bool on)
+{
+#if defined(MODE_LEDS)
+   GPIO_WriteBit(PORT_DMR, PIN_DMR, on ? Bit_SET : Bit_RESET);
+#endif
+#if defined(MODE_PINS) && defined(STM32F4_NUCLEO_MORPHO_HEADER) && (defined(STM32F4_NUCLEO) || defined(STM32F722_RPT_HAT))
+   GPIO_WriteBit(PORT_MDMR, PIN_MDMR, on ? Bit_SET : Bit_RESET);
+#endif
+}
+
+void CIO::setYSFInt(bool on)
+{
+#if defined(MODE_LEDS)
+   GPIO_WriteBit(PORT_YSF, PIN_YSF, on ? Bit_SET : Bit_RESET);
+#endif
+#if defined(MODE_PINS) && defined(STM32F4_NUCLEO_MORPHO_HEADER) && (defined(STM32F4_NUCLEO) || defined(STM32F722_RPT_HAT))
+   GPIO_WriteBit(PORT_MYSF, PIN_MYSF, on ? Bit_SET : Bit_RESET);
+#endif
+}
+
+void CIO::setP25Int(bool on)
+{
+#if defined(MODE_LEDS)
+   GPIO_WriteBit(PORT_P25, PIN_P25, on ? Bit_SET : Bit_RESET);
+#endif
+#if defined(MODE_PINS) && defined(STM32F4_NUCLEO_MORPHO_HEADER) && (defined(STM32F4_NUCLEO) || defined(STM32F722_RPT_HAT))
+   GPIO_WriteBit(PORT_MP25, PIN_MP25, on ? Bit_SET : Bit_RESET);
+#endif
+}
+
+void CIO::setNXDNInt(bool on)
+{
+#if defined(MODE_LEDS)
+#if defined(USE_ALTERNATE_NXDN_LEDS)
+   GPIO_WriteBit(PORT_YSF, PIN_YSF, on ? Bit_SET : Bit_RESET);
+   GPIO_WriteBit(PORT_P25, PIN_P25, on ? Bit_SET : Bit_RESET);
+#else
+   GPIO_WriteBit(PORT_NXDN, PIN_NXDN, on ? Bit_SET : Bit_RESET);
+#endif
+#endif
+
+#if defined(MODE_PINS) && defined(STM32F4_NUCLEO_MORPHO_HEADER) && (defined(STM32F4_NUCLEO) || defined(STM32F722_RPT_HAT))
+#if defined(USE_ALTERNATE_NXDN_LEDS)
+   GPIO_WriteBit(PORT_MYSF, PIN_MYSF, on ? Bit_SET : Bit_RESET);
+   GPIO_WriteBit(PORT_MP25, PIN_MP25, on ? Bit_SET : Bit_RESET);
+#else
+   GPIO_WriteBit(PORT_MNXDN, PIN_MNXDN, on ? Bit_SET : Bit_RESET);
+#endif
+#endif
+}
+
+void CIO::setPOCSAGInt(bool on)
+{
+#if defined(MODE_LEDS)
+#if defined(USE_ALTERNATE_POCSAG_LEDS)
+   GPIO_WriteBit(PORT_DSTAR, PIN_DSTAR, on ? Bit_SET : Bit_RESET);
+   GPIO_WriteBit(PORT_DMR,   PIN_DMR,   on ? Bit_SET : Bit_RESET);
+#else
+   GPIO_WriteBit(PORT_POCSAG,  PIN_POCSAG, on ? Bit_SET : Bit_RESET);
+#endif
+#endif
+
+#if defined(MODE_PINS) && defined(STM32F4_NUCLEO_MORPHO_HEADER) && (defined(STM32F4_NUCLEO) || defined(STM32F722_RPT_HAT))
+#if defined(USE_ALTERNATE_POCSAG_LEDS)
+   GPIO_WriteBit(PORT_MDSTAR, PIN_MDSTAR, on ? Bit_SET : Bit_RESET);
+   GPIO_WriteBit(PORT_MDMR,   PIN_MDMR,   on ? Bit_SET : Bit_RESET);
+#else
+   GPIO_WriteBit(PORT_MPOCSAG, PIN_MPOCSAG, on ? Bit_SET : Bit_RESET);
+#endif
+#endif
+}
+
+void CIO::setFMInt(bool on)
+{
+#if defined(MODE_LEDS)
+#if defined(USE_ALTERNATE_FM_LEDS)
+   GPIO_WriteBit(PORT_DSTAR, PIN_DSTAR, on ? Bit_SET : Bit_RESET);
+   GPIO_WriteBit(PORT_YSF,   PIN_YSF,   on ? Bit_SET : Bit_RESET);
+#else
+   GPIO_WriteBit(PORT_FM,  PIN_FM, on ? Bit_SET : Bit_RESET);
+#endif
+#endif
+
+#if defined(MODE_PINS) && defined(STM32F4_NUCLEO_MORPHO_HEADER) && (defined(STM32F4_NUCLEO) || defined(STM32F722_RPT_HAT))
+#if defined(USE_ALTERNATE_FM_LEDS)
+   GPIO_WriteBit(PORT_MDSTAR, PIN_MDSTAR, on ? Bit_SET : Bit_RESET);
+   GPIO_WriteBit(PORT_MYSF,   PIN_MYSF,   on ? Bit_SET : Bit_RESET);
+#else
+   GPIO_WriteBit(PORT_MFM, PIN_MFM, on ? Bit_SET : Bit_RESET);
+#endif
+#endif
+}
+
+// Simple delay function for STM32
+// Example from: http://thehackerworkshop.com/?p=1209
+void CIO::delayInt(unsigned int dly)
+{
+#if defined(STM32F7XX)
+  unsigned int loopsPerMillisecond = (SystemCoreClock/1000);
+#else
+  unsigned int loopsPerMillisecond = (SystemCoreClock/1000) / 3;
+#endif
+
+  for (; dly > 0; dly--)
+  {
+    asm volatile //this routine waits (approximately) one millisecond
+    (
+      "mov r3, %[loopsPerMillisecond] \n\t" //load the initial loop counter
+      "loop: \n\t"
+        "subs r3, #1 \n\t"
+        "bne loop \n\t"
+
+      : //empty output list
+      : [loopsPerMillisecond] "r" (loopsPerMillisecond) //input to the asm routine
+      : "r3", "cc" //clobber list
+    );
+  }
+}
+
+#endif

IOSTM_CMSIS.cpp

@@ -0,0 +1,508 @@
+/*
+ *   Copyright (C) 2016 by Jim McLaughlin KI6ZUM
+ *   Copyright (C) 2016, 2017 by Andy Uribe CA6JAU
+ *   Copyright (C) 2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2017 by Wojciech Krutnik N0CALL
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+#include "Globals.h"
+#include "IO.h"
+
+
+#if defined(STM32F1)
+
+#if defined(STM32F1_POG)
+/*
+Pin definitions for STM32F1 POG Board:
+
+PTT      PB12   output
+COSLED   PB5    output
+LED      PB4    output
+COS      PB13   input/PD
+
+DSTAR    PB7    output
+DMR      PB6    output
+YSF      PB8    output
+P25      PB9    output
+NXDN     PB10   output
+POCSAG   PB11   output
+FM       PB12   output
+
+RX       PB0    analog input (ADC1_8)
+RSSI     PB1    analog input (ADC2_9)
+TX       PA4    analog output (DAC_OUT1)
+
+EXT_CLK  PA15   input (AF: TIM2_CH1_ETR)
+
+USART1_TXD PA9  output (AF)
+USART1_RXD PA10  input (AF)
+
+*/
+
+#define PIN_PTT           12
+#define PORT_PTT          GPIOB
+#define BB_PTT            *((bitband_t)BITBAND_PERIPH(&PORT_PTT->ODR, PIN_PTT))
+#define PIN_COSLED        5
+#define PORT_COSLED       GPIOB
+#define BB_COSLED         *((bitband_t)BITBAND_PERIPH(&PORT_COSLED->ODR, PIN_COSLED))
+#define PIN_LED           4
+#define PORT_LED          GPIOB
+#define BB_LED            *((bitband_t)BITBAND_PERIPH(&PORT_LED->ODR, PIN_LED))
+#define PIN_COS           13
+#define PORT_COS          GPIOB
+#define BB_COS            *((bitband_t)BITBAND_PERIPH(&PORT_COS->IDR, PIN_COS))
+
+#define PIN_DSTAR         7
+#define PORT_DSTAR        GPIOB
+#define BB_DSTAR          *((bitband_t)BITBAND_PERIPH(&PORT_DSTAR->ODR, PIN_DSTAR))
+#define PIN_DMR           6
+#define PORT_DMR          GPIOB
+#define BB_DMR            *((bitband_t)BITBAND_PERIPH(&PORT_DMR->ODR, PIN_DMR))
+#define PIN_YSF           8
+#define PORT_YSF          GPIOB
+#define BB_YSF            *((bitband_t)BITBAND_PERIPH(&PORT_YSF->ODR, PIN_YSF))
+#define PIN_P25           9
+#define PORT_P25          GPIOB
+#define BB_P25            *((bitband_t)BITBAND_PERIPH(&PORT_P25->ODR, PIN_P25))
+#define PIN_NXDN          10
+#define PORT_NXDN         GPIOB
+#define BB_NXDN           *((bitband_t)BITBAND_PERIPH(&PORT_NXDN->ODR, PIN_NXDN))
+#define PIN_POCSAG        11
+#define PORT_POCSAG       GPIOB
+#define BB_POCSAG         *((bitband_t)BITBAND_PERIPH(&PORT_POCSAG->ODR, PIN_POCSAG))
+#define PIN_FM            14
+#define PORT_FM           GPIOB
+#define BB_FM             *((bitband_t)BITBAND_PERIPH(&PORT_FM->ODR, PIN_FM))
+
+#define PIN_RX            0
+#define PIN_RX_ADC_CH     8
+#define PORT_RX           GPIOB
+#define PIN_RSSI          1
+#define PIN_RSSI_ADC_CH   9
+#define PORT_RSSI         GPIOB
+#define PIN_TX            4
+#define PIN_TX_DAC_CH     1
+#define PORT_TX           GPIOA
+
+#define PIN_EXT_CLK       15
+#define SRC_EXT_CLK       15
+#define PORT_EXT_CLK      GPIOA
+
+#define PIN_USART1_TXD    9
+#define PORT_USART1_TXD   GPIOA
+#define PIN_USART1_RXD    10
+#define PORT_USART1_RXD   GPIOA
+
+#else   // defined(STM32F1_POG)
+#error "Either STM32F1_POG, or sth need to be defined"
+#endif  // defined(STM32F1_POG)
+
+const uint16_t DC_OFFSET = 2048U;
+
+// Sampling frequency
+#define SAMP_FREQ   24000
+
+extern "C" {
+  void TIM2_IRQHandler() {
+    if ((TIM2->SR & TIM_SR_UIF) == TIM_SR_UIF) {
+      TIM2->SR = ~TIM_SR_UIF;   // clear UI flag
+      io.interrupt();
+    }
+  }
+}
+
+
+void delay(uint32_t cnt)
+{
+  while(cnt--)
+    asm("nop");
+}
+
+// source: http://www.freddiechopin.info/
+void GPIOConfigPin(GPIO_TypeDef *port_ptr, uint32_t pin, uint32_t mode_cnf_value)
+{
+	volatile uint32_t *cr_ptr;
+	uint32_t cr_value;
+
+	cr_ptr = &port_ptr->CRL;  // configuration of pins [0,7] is in CRL
+
+	if (pin >= 8)			        // is pin in [8; 15]?
+	{									        // configuration of pins [8,15] is in CRH
+		cr_ptr++;               // advance to next struct element CRL -> CRH
+		pin -= 8;               // crop the pin number
+	}
+
+	cr_value = *cr_ptr;			  // localize the CRL / CRH value
+
+	cr_value &= ~(0xF << (pin * 4));	// clear the MODE and CNF fields (now that pin is an analog input)
+	cr_value |= (mode_cnf_value << (pin * 4));	        // save new MODE and CNF value for desired pin
+
+	*cr_ptr = cr_value;				// save localized value to CRL / CRL
+}
+
+#if defined(STM32F1_POG)
+void FancyLEDEffect()
+{
+  int ledCount = 10;
+
+  bitband_t foo[] = {&BB_LED, &BB_COSLED, &BB_PTT, &BB_DMR, &BB_DSTAR, &BB_YSF, &BB_P25,
+#if defined(USE_ALTERNATE_NXDN_LEDS)
+	NULL,
+#else
+	&BB_NXDN,
+#endif
+#if defined(USE_ALTERNATE_POCSAG_LEDS)
+	NULL,
+#else
+  	&BB_POCSAG,
+#endif
+#if defined(USE_ALTERNATE_FM_LEDS)
+	NULL};
+#else
+	&BB_FM};
+#endif
+
+  for(int i=0; i<ledCount; i++){
+    if(foo[i] != NULL)
+      *foo[i] = 0x01;
+  }
+  GPIOConfigPin(PORT_USART1_TXD, PIN_USART1_TXD, GPIO_CRL_MODE0_1);
+  *((bitband_t)BITBAND_PERIPH(&PORT_USART1_TXD->ODR, PIN_USART1_TXD)) = 0x00;
+  delay(SystemCoreClock/1000*100);
+  for(int i=0; i<ledCount; i++){
+    if(foo[i] != NULL)
+      *foo[i] = 0x00;
+  }
+  *((bitband_t)BITBAND_PERIPH(&PORT_USART1_TXD->ODR, PIN_USART1_TXD)) = 0x01;
+  delay(SystemCoreClock/1000*20);
+  *((bitband_t)BITBAND_PERIPH(&PORT_USART1_TXD->ODR, PIN_USART1_TXD)) = 0x00;
+  delay(SystemCoreClock/1000*10);
+  *((bitband_t)BITBAND_PERIPH(&PORT_USART1_TXD->ODR, PIN_USART1_TXD)) = 0x01;
+  
+  *foo[0] = 0x01;
+  for(int i=1; i<ledCount; i++){
+    delay(SystemCoreClock/1000*10);
+    if (foo[i-1] != NULL)
+      *foo[i-1] = 0x00;
+    if (foo[i] != NULL)
+      *foo[i] = 0x01;
+  }
+  for(int i=ledCount - 2; i>=0; i--) {
+    delay(SystemCoreClock/1000*10);
+    if (foo[i+1] != NULL)
+      *foo[i+1] = 0x00;
+    if (foo[i] != NULL)
+      *foo[i] = 0x01;
+  }
+  delay(SystemCoreClock/1000*10);
+  *foo[0] = 0x00;
+  *((bitband_t)BITBAND_PERIPH(&PORT_USART1_TXD->ODR, PIN_USART1_TXD)) = 0x00;
+  delay(SystemCoreClock/1000*10);
+  *((bitband_t)BITBAND_PERIPH(&PORT_USART1_TXD->ODR, PIN_USART1_TXD)) = 0x01;
+  GPIOConfigPin(PORT_USART1_TXD, PIN_USART1_TXD, GPIO_CRL_MODE0_1|GPIO_CRL_CNF0_1);
+  delay(SystemCoreClock/1000*50);
+}
+#endif
+
+static inline void GPIOInit()
+{
+  RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN
+                  | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_IOPDEN
+                  | RCC_APB2ENR_AFIOEN;	// enable all GPIOs
+                 
+	// set all ports to input with pull-down
+	GPIOA->CRL = 0x88888888;
+	GPIOA->CRH = 0x88888888;
+	GPIOA->ODR = 0;
+	GPIOB->CRL = 0x88888888;
+	GPIOB->CRH = 0x88888888;
+	GPIOB->ODR = 0;
+	GPIOC->CRL = 0x88888888;
+	GPIOC->CRH = 0x88888888;
+	GPIOC->ODR = 0;
+	GPIOD->CRL = 0x88888888;
+	GPIOD->CRH = 0x88888888;
+	GPIOD->ODR = 0;
+  
+  // configure ports
+  GPIOConfigPin(PORT_PTT,    PIN_PTT,    GPIO_CRL_MODE0_1);
+  GPIOConfigPin(PORT_COSLED, PIN_COSLED, GPIO_CRL_MODE0_1);
+  GPIOConfigPin(PORT_LED,    PIN_LED,    GPIO_CRL_MODE0_1);
+  GPIOConfigPin(PORT_COS,    PIN_COS,    GPIO_CRL_CNF0_1);
+  
+  GPIOConfigPin(PORT_DSTAR,  PIN_DSTAR,  GPIO_CRL_MODE0_1);
+  GPIOConfigPin(PORT_DMR,    PIN_DMR,    GPIO_CRL_MODE0_1);
+  GPIOConfigPin(PORT_YSF,    PIN_YSF,    GPIO_CRL_MODE0_1);
+  GPIOConfigPin(PORT_P25,    PIN_P25,    GPIO_CRL_MODE0_1);
+#if !defined(USE_ALTERNATE_NXDN_LEDS)
+  GPIOConfigPin(PORT_NXDN,   PIN_NXDN,   GPIO_CRL_MODE0_1);
+#endif
+#if !defined(USE_ALTERNATE_POCSAG_LEDS)
+  GPIOConfigPin(PORT_POCSAG, PIN_POCSAG, GPIO_CRL_MODE0_1);
+#endif
+#if !defined(USE_ALTERNATE_FM_LEDS)
+  GPIOConfigPin(PORT_FM,     PIN_FM,     GPIO_CRL_MODE0_1);
+#endif
+
+  GPIOConfigPin(PORT_RX, PIN_RX, 0);
+#if defined(SEND_RSSI_DATA)
+  GPIOConfigPin(PORT_RSSI, PIN_RSSI, 0);
+#endif
+  GPIOConfigPin(PORT_TX, PIN_TX, 0);
+
+#if defined(EXTERNAL_OSC)
+#if defined(STM32F1_POG)
+  GPIOConfigPin(PORT_EXT_CLK, PIN_EXT_CLK, GPIO_CRL_CNF0_0);
+  AFIO->MAPR = (AFIO->MAPR & ~AFIO_MAPR_TIM2_REMAP) | AFIO_MAPR_TIM2_REMAP_0;
+#endif
+#endif
+
+  GPIOConfigPin(PORT_USART1_TXD, PIN_USART1_TXD, GPIO_CRL_MODE0_1|GPIO_CRL_CNF0_1);
+  GPIOConfigPin(PORT_USART1_RXD, PIN_USART1_RXD, GPIO_CRL_CNF0_0);
+  
+  AFIO->MAPR = (AFIO->MAPR & ~AFIO_MAPR_SWJ_CFG) | AFIO_MAPR_SWJ_CFG_1;
+}
+
+
+static inline void ADCInit()
+{
+  RCC->CFGR = (RCC->CFGR & ~RCC_CFGR_ADCPRE_Msk)
+              | RCC_CFGR_ADCPRE_DIV6; // ADC clock divided by 6 (72MHz/6 = 12MHz)
+  RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
+#if defined(SEND_RSSI_DATA)
+  RCC->APB2ENR |= RCC_APB2ENR_ADC2EN;
+#endif
+
+  // Init ADCs in dual mode (RSSI)
+#if defined(SEND_RSSI_DATA)
+  ADC1->CR1 = ADC_CR1_DUALMOD_1|ADC_CR1_DUALMOD_2;  // Regular simultaneous mode
+#endif
+
+  // Set sampling time to 7.5 cycles
+  if (PIN_RX_ADC_CH < 10) {
+    ADC1->SMPR2 = ADC_SMPR2_SMP0_0 << (3*PIN_RX_ADC_CH); 
+  } else {
+    ADC1->SMPR1 = ADC_SMPR1_SMP10_0 << (3*PIN_RX_ADC_CH);
+  }
+#if defined(SEND_RSSI_DATA)
+  if (PIN_RSSI_ADC_CH < 10) {
+    ADC2->SMPR2 = ADC_SMPR2_SMP0_0 << (3*PIN_RSSI_ADC_CH); 
+  } else {
+    ADC2->SMPR1 = ADC_SMPR1_SMP10_0 << (3*PIN_RSSI_ADC_CH);
+  }
+#endif
+
+  // Set conversion channel (single conversion)
+  ADC1->SQR3 = PIN_RX_ADC_CH;
+#if defined(SEND_RSSI_DATA)
+  ADC2->SQR3 = PIN_RSSI_ADC_CH;
+#endif
+
+  // Enable ADC
+  ADC1->CR2 |= ADC_CR2_ADON;
+
+#if defined(SEND_RSSI_DATA)
+  // Enable ADC2
+  ADC2->CR2 |= ADC_CR2_ADON;
+#endif
+
+  // Start calibration
+  delay(6*2);
+  ADC1->CR2 |= ADC_CR2_CAL;
+  while((ADC1->CR2 & ADC_CR2_CAL) == ADC_CR2_CAL)
+    ;
+#if defined(SEND_RSSI_DATA)
+  ADC2->CR2 |= ADC_CR2_CAL;
+  while((ADC2->CR2 & ADC_CR2_CAL) == ADC_CR2_CAL)
+    ;
+#endif
+  
+  // Trigger first conversion
+  ADC1->CR2 |= ADC_CR2_ADON;
+#if defined(SEND_RSSI_DATA)
+  ADC2->CR2 |= ADC_CR2_ADON;
+#endif
+}
+
+
+static inline void DACInit()
+{
+  RCC->APB1ENR |= RCC_APB1ENR_DACEN;
+
+  DAC->CR = DAC_CR_EN1;
+}
+
+
+static inline void TimerInit()
+{
+  RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;
+
+#if defined(EXTERNAL_OSC)
+  // Enable external clock, prescaler /4
+  TIM2->SMCR = TIM_SMCR_ECE | TIM_SMCR_ETPS_1;
+#endif
+
+  // TIM2 output frequency
+  TIM2->PSC = 0;
+#if defined(EXTERNAL_OSC)
+  // TimerCount = ExternalOsc
+  //              /4 (external clock prescaler)
+  //              /SAMP_FREQ
+  TIM2->ARR = (uint16_t) ((EXTERNAL_OSC/(4*SAMP_FREQ)) - 1);
+#else
+  TIM2->ARR = (uint16_t) ((SystemCoreClock/(SAMP_FREQ)) - 1);
+#endif
+
+  // Enable TIse 1%-tolerance comM2 interrupt
+  TIM2->DIER = TIM_DIER_UIE;
+  NVIC_EnableIRQ(TIM2_IRQn);
+  
+  // Enable TIM2
+  TIM2->CR1 |= TIM_CR1_CEN;
+}
+
+
+void CIO::initInt()
+{
+  GPIOInit();
+  ADCInit();
+  DACInit();
+#if defined(STM32F1_POG)
+  FancyLEDEffect();
+#endif
+}
+
+void CIO::startInt()
+{
+  TimerInit();
+   
+  BB_COSLED = 0;
+  BB_LED = 1;
+}
+
+void CIO::interrupt()
+{
+  uint8_t control  = MARK_NONE;
+  uint16_t sample  = DC_OFFSET;
+#if defined(SEND_RSSI_DATA)
+  uint16_t rawRSSI = 0U;
+#endif
+  bitband_t eoc = (bitband_t)BITBAND_PERIPH(&ADC1->SR, ADC_SR_EOS_Pos);
+  bitband_t adon = (bitband_t)BITBAND_PERIPH(&ADC1->CR2, ADC_CR2_ADON_Pos);
+#if defined(SEND_RSSI_DATA)
+  bitband_t rssi_adon = (bitband_t)BITBAND_PERIPH(&ADC2->CR2, ADC_CR2_ADON_Pos);
+#endif
+
+  if (*eoc) {
+    // trigger next conversion
+    *adon = 1;
+#if defined(SEND_RSSI_DATA)
+    *rssi_adon = 1;
+#endif
+    
+    m_txBuffer.get(sample, control);
+    DAC->DHR12R1 = sample;  // Send the value to the DAC
+
+    // Read value from ADC1 and ADC2
+    sample  = ADC1->DR;   // read conversion result; EOC is cleared by this read
+    m_rxBuffer.put(sample, control);
+#if defined(SEND_RSSI_DATA)
+    rawRSSI = ADC2->DR;
+    m_rssiBuffer.put(rawRSSI);
+#endif
+
+    m_watchdog++;
+  }
+}
+
+bool CIO::getCOSInt()
+{
+  return BB_COS;
+}
+
+void CIO::setLEDInt(bool on)
+{
+  BB_LED = !!on;
+}
+
+void CIO::setPTTInt(bool on)
+{
+  BB_PTT = !!on;
+}
+
+void CIO::setCOSInt(bool on)
+{
+  BB_COSLED = !!on;
+}
+
+void CIO::setDStarInt(bool on)
+{
+  BB_DSTAR = !!on;
+}
+
+void CIO::setDMRInt(bool on)
+{
+  BB_DMR = !!on;
+}
+
+void CIO::setYSFInt(bool on)
+{
+  BB_YSF = !!on;
+}
+
+void CIO::setP25Int(bool on)
+{
+  BB_P25 = !!on;
+}
+
+void CIO::setNXDNInt(bool on)
+{
+#if defined(USE_ALTERNATE_NXDN_LEDS)
+  BB_YSF = !!on;
+  BB_P25 = !!on;
+#else
+  BB_NXDN = !!on;
+#endif
+}
+
+void CIO::setPOCSAGInt(bool on)
+{
+#if defined(USE_ALTERNATE_POCSAG_LEDS)
+  BB_DSTAR = !!on;
+  BB_DMR   = !!on;
+#else
+  BB_POCSAG = !!on;
+#endif
+}
+
+void CIO::setFMInt(bool on)
+{
+#if defined(USE_ALTERNATE_FM_LEDS)
+  BB_DSTAR = !!on;
+  BB_YSF   = !!on;
+#else
+  BB_FM = !!on;
+#endif
+}
+
+void CIO::delayInt(unsigned int dly)
+{
+  delay(dly);
+}
+
+#endif

IOTeensy.cpp

@@ -0,0 +1,266 @@
+/*
+ *   Copyright (C) 2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+#include "Globals.h"
+#include "IO.h"
+
+#if defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
+
+#if defined(EXTERNAL_OSC)
+#define PIN_LED                3
+#else
+#define PIN_LED                13
+#endif
+#define PIN_COS                4
+#define PIN_PTT                5
+#define PIN_COSLED             6
+#define PIN_DSTAR              9
+#define PIN_DMR                10
+#define PIN_YSF                11
+#define PIN_P25                12
+#if defined(__MK20DX256__)
+#define PIN_NXDN               2
+#define PIN_POCSAG             3
+#define PIN_FM                 4
+#else
+#define PIN_NXDN               24
+#define PIN_POCSAG             25
+#define PIN_FM                 26
+#endif
+#define PIN_ADC                5        // A0,  Pin 14
+#define PIN_RSSI               4        // Teensy 3.5/3.6, A16, Pin 35. Teensy 3.1/3.2, A17, Pin 28
+
+#define PDB_CHnC1_TOS 0x0100
+#define PDB_CHnC1_EN  0x0001
+
+const uint16_t DC_OFFSET = 2048U;
+
+extern "C" {
+  void adc0_isr()
+  {
+    io.interrupt();
+  }
+}
+
+void CIO::initInt()
+{
+  // Set up the TX, COS and LED pins
+  pinMode(PIN_PTT,    OUTPUT);
+  pinMode(PIN_COSLED, OUTPUT);
+  pinMode(PIN_LED,    OUTPUT);
+  pinMode(PIN_COS,    INPUT);
+
+#if defined(MODE_LEDS)
+  // Set up the mode output pins
+  pinMode(PIN_DSTAR,  OUTPUT);
+  pinMode(PIN_DMR,    OUTPUT);
+  pinMode(PIN_YSF,    OUTPUT);
+  pinMode(PIN_P25,    OUTPUT);
+#if !defined(USE_ALTERNATE_NXDN_LEDS)
+  pinMode(PIN_NXDN,   OUTPUT);
+#endif
+#if !defined(USE_ALTERNATE_POCSAG_LEDS)
+  pinMode(PIN_POCSAG, OUTPUT);
+#endif
+#if !defined(USE_ALTERNATE_FM_LEDS)
+  pinMode(PIN_FM,     OUTPUT);
+#endif
+#endif
+}
+
+void CIO::startInt()
+{
+  // Initialise the DAC
+  SIM_SCGC2 |= SIM_SCGC2_DAC0;
+  DAC0_C0    = DAC_C0_DACEN | DAC_C0_DACRFS;                          // 3.3V VDDA is DACREF_2
+
+  // Initialise ADC0
+  SIM_SCGC6 |= SIM_SCGC6_ADC0;
+  ADC0_CFG1  = ADC_CFG1_ADIV(1) | ADC_CFG1_ADICLK(1) |                // Single-ended 12 bits, long sample time
+               ADC_CFG1_MODE(1) | ADC_CFG1_ADLSMP;
+  ADC0_CFG2  = ADC_CFG2_MUXSEL | ADC_CFG2_ADLSTS(2);                  // Select channels ADxxxb
+  ADC0_SC2   = ADC_SC2_REFSEL(0) | ADC_SC2_ADTRG;                     // Voltage ref external, hardware trigger
+  ADC0_SC3   = ADC_SC3_AVGE | ADC_SC3_AVGS(0);                        // Enable averaging, 4 samples
+
+  ADC0_SC3  |= ADC_SC3_CAL;
+  while (ADC0_SC3 & ADC_SC3_CAL)                                      // Wait for calibration
+    ;
+
+  uint16_t sum0 = ADC0_CLPS + ADC0_CLP4 + ADC0_CLP3 +                 // Plus side gain
+                  ADC0_CLP2 + ADC0_CLP1 + ADC0_CLP0;
+  sum0 = (sum0 / 2U) | 0x8000U;
+  ADC0_PG    = sum0;
+
+  ADC0_SC1A  = ADC_SC1_AIEN | PIN_ADC;                                // Enable ADC interrupt, use A0
+  NVIC_ENABLE_IRQ(IRQ_ADC0);
+
+#if defined(SEND_RSSI_DATA)
+  // Initialise ADC1
+  SIM_SCGC3 |= SIM_SCGC3_ADC1;
+  ADC1_CFG1  = ADC_CFG1_ADIV(1) | ADC_CFG1_ADICLK(1) |                // Single-ended 12 bits, long sample time
+               ADC_CFG1_MODE(1) | ADC_CFG1_ADLSMP;
+  ADC1_CFG2  = ADC_CFG2_MUXSEL | ADC_CFG2_ADLSTS(2);                  // Select channels ADxxxb
+  ADC1_SC2   = ADC_SC2_REFSEL(0);                                     // Voltage ref external, software trigger
+  ADC1_SC3   = ADC_SC3_AVGE | ADC_SC3_AVGS(0);                        // Enable averaging, 4 samples
+
+  ADC1_SC3  |= ADC_SC3_CAL;
+  while (ADC1_SC3 & ADC_SC3_CAL)                                      // Wait for calibration
+    ;
+
+  uint16_t sum1 = ADC1_CLPS + ADC1_CLP4 + ADC1_CLP3 +                 // Plus side gain
+                  ADC1_CLP2 + ADC1_CLP1 + ADC1_CLP0;
+  sum1 = (sum1 / 2U) | 0x8000U;
+  ADC1_PG    = sum1;
+#endif
+
+#if defined(EXTERNAL_OSC)
+  // Set ADC0 to trigger from the LPTMR at 24 kHz
+  SIM_SOPT7   = SIM_SOPT7_ADC0ALTTRGEN |                              // Enable ADC0 alternate trigger
+                SIM_SOPT7_ADC0TRGSEL(14);                             // Trigger ADC0 by LPTMR0
+
+  CORE_PIN13_CONFIG = PORT_PCR_MUX(3);
+
+  SIM_SCGC5  |= SIM_SCGC5_LPTIMER;                                    // Enable Low Power Timer Access
+  LPTMR0_CSR  = 0;                                                    // Disable
+  LPTMR0_PSR  = LPTMR_PSR_PBYP;                                       // Bypass prescaler/filter
+  LPTMR0_CMR  = (EXTERNAL_OSC / 24000) - 1;                           // Frequency divided by CMR + 1
+  LPTMR0_CSR  = LPTMR_CSR_TPS(2) |                                    // Pin: 0=CMP0, 1=xtal, 2=pin13
+                LPTMR_CSR_TMS;                                        // Mode Select, 0=timer, 1=counter
+  LPTMR0_CSR |= LPTMR_CSR_TEN;                                        // Enable
+#else
+  // Setup PDB for ADC0 at 24 kHz
+  SIM_SCGC6  |= SIM_SCGC6_PDB;                                        // Enable PDB clock
+  PDB0_MOD    = (F_BUS / 24000) - 1;                                  // Timer period - 1
+  PDB0_IDLY   = 0;                                                    // Interrupt delay
+  PDB0_CH0C1  = PDB_CHnC1_TOS | PDB_CHnC1_EN;                         // Enable pre-trigger for ADC0
+  PDB0_SC     = PDB_SC_TRGSEL(15) | PDB_SC_PDBEN |                    // SW trigger, enable interrupts, continuous mode
+                PDB_SC_PDBIE | PDB_SC_CONT | PDB_SC_LDOK;             // No prescaling
+  PDB0_SC    |= PDB_SC_SWTRIG;                                        // Software trigger (reset and restart counter)
+#endif
+
+  digitalWrite(PIN_PTT, m_pttInvert ? HIGH : LOW);
+  digitalWrite(PIN_COSLED, LOW);
+  digitalWrite(PIN_LED,    HIGH);
+}
+
+void CIO::interrupt()
+{
+  uint8_t control = MARK_NONE;
+  uint16_t sample = DC_OFFSET;
+
+  m_txBuffer.get(sample, control);
+  *(int16_t *)&(DAC0_DAT0L) = sample;
+
+  if ((ADC0_SC1A & ADC_SC1_COCO) == ADC_SC1_COCO) {
+    sample = ADC0_RA;
+    m_rxBuffer.put(sample, control);
+  }
+    
+#if defined(SEND_RSSI_DATA)
+  if ((ADC1_SC1A & ADC_SC1_COCO) == ADC_SC1_COCO) {
+    uint16_t rssi = ADC1_RA;
+    m_rssiBuffer.put(rssi);
+  } else {
+    m_rssiBuffer.put(0U);
+  }
+
+  ADC1_SC1A  = PIN_RSSI;         				    // Start the next RSSI conversion
+#else
+  m_rssiBuffer.put(0U);
+#endif
+
+  m_watchdog++;
+}
+
+bool CIO::getCOSInt()
+{
+  return digitalRead(PIN_COS) == HIGH;
+}
+
+void CIO::setLEDInt(bool on)
+{
+  digitalWrite(PIN_LED, on ? HIGH : LOW);
+}
+
+void CIO::setPTTInt(bool on)
+{
+  digitalWrite(PIN_PTT, on ? HIGH : LOW);
+}
+
+void CIO::setCOSInt(bool on)
+{
+  digitalWrite(PIN_COSLED, on ? HIGH : LOW);
+}
+
+void CIO::setDStarInt(bool on)
+{
+  digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
+}
+
+void CIO::setDMRInt(bool on) 
+{
+  digitalWrite(PIN_DMR, on ? HIGH : LOW);
+}
+
+void CIO::setYSFInt(bool on)
+{
+  digitalWrite(PIN_YSF, on ? HIGH : LOW);
+}
+
+void CIO::setP25Int(bool on) 
+{
+  digitalWrite(PIN_P25, on ? HIGH : LOW);
+}
+
+void CIO::setNXDNInt(bool on)
+{
+#if defined(USE_ALTERNATE_NXDN_LEDS)
+  digitalWrite(PIN_YSF, on ? HIGH : LOW);
+  digitalWrite(PIN_P25, on ? HIGH : LOW);
+#else
+  digitalWrite(PIN_NXDN, on ? HIGH : LOW);
+#endif
+}
+
+void CIO::setPOCSAGInt(bool on)
+{
+#if defined(USE_ALTERNATE_POCSAG_LEDS)
+  digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
+  digitalWrite(PIN_DMR,   on ? HIGH : LOW);
+#else
+  digitalWrite(PIN_POCSAG, on ? HIGH : LOW);
+#endif
+}
+
+void CIO::setFMInt(bool on)
+{
+#if defined(USE_ALTERNATE_FM_LEDS)
+  digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
+  digitalWrite(PIN_YSF,   on ? HIGH : LOW);
+#else
+  digitalWrite(PIN_FM, on ? HIGH : LOW);
+#endif
+}
+
+void CIO::delayInt(unsigned int dly)
+{
+  delay(dly);
+}
+
+#endif

MMDVM.cpp

@@ -0,0 +1,146 @@
+/*
+ *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2016 by Mathis Schmieder DB9MAT
+ *   Copyright (C) 2016 by Colin Durbridge G4EML
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if defined(STM32F4XX) || defined(STM32F7XX) || defined(STM32F105xC)
+
+#include "Config.h"
+#include "Globals.h"
+
+// Global variables
+MMDVM_STATE m_modemState = STATE_IDLE;
+
+bool m_dstarEnable  = true;
+bool m_dmrEnable    = true;
+bool m_ysfEnable    = true;
+bool m_p25Enable    = true;
+bool m_nxdnEnable   = true;
+bool m_pocsagEnable = true;
+bool m_fmEnable     = true;
+
+bool m_duplex = true;
+
+bool m_tx  = false;
+bool m_dcd = false;
+
+CDStarRX   dstarRX;
+CDStarTX   dstarTX;
+
+CDMRIdleRX dmrIdleRX;
+CDMRRX     dmrRX;
+CDMRTX     dmrTX;
+
+CDMRDMORX  dmrDMORX;
+CDMRDMOTX  dmrDMOTX;
+
+CYSFRX     ysfRX;
+CYSFTX     ysfTX;
+
+CP25RX     p25RX;
+CP25TX     p25TX;
+
+CNXDNRX    nxdnRX;
+CNXDNTX    nxdnTX;
+
+CPOCSAGTX  pocsagTX;
+
+CFM        fm;
+
+CCalDStarRX calDStarRX;
+CCalDStarTX calDStarTX;
+CCalDMR     calDMR;
+CCalP25     calP25;
+CCalNXDN    calNXDN;
+CCalFM      calFM;
+CCalPOCSAG  calPOCSAG;
+CCalRSSI    calRSSI;
+
+CCWIdTX cwIdTX;
+
+CSerialPort serial;
+CIO io;
+
+void setup()
+{
+  serial.start();
+}
+
+void loop()
+{
+  serial.process();
+  
+  io.process();
+
+  // The following is for transmitting
+  if (m_dstarEnable && m_modemState == STATE_DSTAR)
+    dstarTX.process();
+
+  if (m_dmrEnable && m_modemState == STATE_DMR) {
+    if (m_duplex)
+      dmrTX.process();
+    else
+      dmrDMOTX.process();
+  }
+
+  if (m_ysfEnable && m_modemState == STATE_YSF)
+    ysfTX.process();
+
+  if (m_p25Enable && m_modemState == STATE_P25)
+    p25TX.process();
+
+  if (m_nxdnEnable && m_modemState == STATE_NXDN)
+    nxdnTX.process();
+
+  if (m_pocsagEnable && (m_modemState == STATE_POCSAG || pocsagTX.busy()))
+    pocsagTX.process();
+
+  if (m_fmEnable && m_modemState == STATE_FM)
+    fm.process();
+
+  if (m_modemState == STATE_DSTARCAL)
+    calDStarTX.process();
+
+  if (m_modemState == STATE_DMRCAL || m_modemState == STATE_LFCAL || m_modemState == STATE_DMRCAL1K || m_modemState == STATE_DMRDMO1K)
+    calDMR.process();
+
+  if (m_modemState == STATE_P25CAL1K)
+    calP25.process();
+
+  if (m_modemState == STATE_NXDNCAL1K)
+    calNXDN.process();
+
+  if (m_modemState == STATE_POCSAGCAL)
+    calPOCSAG.process();
+
+  if (m_modemState == STATE_FMCAL10K || m_modemState == STATE_FMCAL12K || m_modemState == STATE_FMCAL15K || m_modemState == STATE_FMCAL20K || m_modemState == STATE_FMCAL25K ||m_modemState == STATE_FMCAL30K)
+    calFM.process();
+
+  if (m_modemState == STATE_IDLE)
+    cwIdTX.process();
+}
+
+int main()
+{
+  setup();
+
+  for (;;)
+    loop();
+}
+
+#endif

MMDVM.ino

@@ -1,6 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2018,2020,2021 by Jonathan Naylor G4KLX
- *   Copyright (C) 2016 by Mathis Schmieder DB9MAT
+ *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
  *   Copyright (C) 2016 by Colin Durbridge G4EML
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -29,77 +28,45 @@ bool m_dmrEnable    = true;
 bool m_ysfEnable    = true;
 bool m_p25Enable    = true;
 bool m_nxdnEnable   = true;
-bool m_m17Enable    = true;
 bool m_pocsagEnable = true;
 bool m_fmEnable     = true;
-bool m_ax25Enable   = true;
 
 bool m_duplex = true;
 
 bool m_tx  = false;
 bool m_dcd = false;
 
-#if defined(MODE_DSTAR)
-CDStarRX dstarRX;
-CDStarTX dstarTX;
+CDStarRX   dstarRX;
+CDStarTX   dstarTX;
+
+CDMRIdleRX dmrIdleRX;
+CDMRRX     dmrRX;
+CDMRTX     dmrTX;
+
+CDMRDMORX  dmrDMORX;
+CDMRDMOTX  dmrDMOTX;
+
+CYSFRX     ysfRX;
+CYSFTX     ysfTX;
+
+CP25RX     p25RX;
+CP25TX     p25TX;
+
+CNXDNRX    nxdnRX;
+CNXDNTX    nxdnTX;
+
+CPOCSAGTX  pocsagTX;
+
+CFM        fm;
 
 CCalDStarRX calDStarRX;
 CCalDStarTX calDStarTX;
-#endif
-
-#if defined(MODE_DMR)
-CDMRIdleRX dmrIdleRX;
-CDMRRX dmrRX;
-CDMRTX dmrTX;
-
-CDMRDMORX dmrDMORX;
-CDMRDMOTX dmrDMOTX;
-
-CCalDMR calDMR;
-#endif
-
-#if defined(MODE_YSF)
-CYSFRX ysfRX;
-CYSFTX ysfTX;
-#endif
-
-#if defined(MODE_P25)
-CP25RX p25RX;
-CP25TX p25TX;
-
-CCalP25 calP25;
-#endif
-
-#if defined(MODE_NXDN)
-CNXDNRX nxdnRX;
-CNXDNTX nxdnTX;
-
-CCalNXDN calNXDN;
-#endif
-
-#if defined(MODE_M17)
-CM17RX m17RX;
-CM17TX m17TX;
-
-CCalM17 calM17;
-#endif
-
-#if defined(MODE_POCSAG)
-CPOCSAGTX  pocsagTX;
-CCalPOCSAG calPOCSAG;
-#endif
-
-#if defined(MODE_FM)
-CFM    fm;
-CCalFM calFM;
-#endif
-
-#if defined(MODE_AX25)
-CAX25RX ax25RX;
-CAX25TX ax25TX;
-#endif
-
-CCalRSSI calRSSI;
+CCalDMR     calDMR;
+CCalFM      calFM;
+CCalP25     calP25;
+CCalNXDN    calNXDN;
+CCalPOCSAG  calPOCSAG;
+CCalRSSI    calRSSI;
 
 CCWIdTX cwIdTX;
 
@@ -118,89 +85,48 @@ void loop()
   io.process();
 
   // The following is for transmitting
-#if defined(MODE_DSTAR)
   if (m_dstarEnable && m_modemState == STATE_DSTAR)
     dstarTX.process();
-#endif
 
-#if defined(MODE_DMR)
   if (m_dmrEnable && m_modemState == STATE_DMR) {
     if (m_duplex)
       dmrTX.process();
     else
       dmrDMOTX.process();
   }
-#endif
 
-#if defined(MODE_YSF)
   if (m_ysfEnable && m_modemState == STATE_YSF)
     ysfTX.process();
-#endif
 
-#if defined(MODE_P25)
   if (m_p25Enable && m_modemState == STATE_P25)
     p25TX.process();
-#endif
 
-#if defined(MODE_NXDN)
   if (m_nxdnEnable && m_modemState == STATE_NXDN)
     nxdnTX.process();
-#endif
 
-#if defined(MODE_M17)
-  if (m_m17Enable && m_modemState == STATE_M17)
-    m17TX.process();
-#endif
-
-#if defined(MODE_POCSAG)
   if (m_pocsagEnable && (m_modemState == STATE_POCSAG || pocsagTX.busy()))
     pocsagTX.process();
-#endif
 
-#if defined(MODE_AX25)
-  if (m_ax25Enable && (m_modemState == STATE_IDLE || m_modemState == STATE_FM))
-    ax25TX.process();
-#endif
-
-#if defined(MODE_FM)
   if (m_fmEnable && m_modemState == STATE_FM)
     fm.process();
-#endif
 
-#if defined(MODE_DSTAR)
   if (m_modemState == STATE_DSTARCAL)
     calDStarTX.process();
-#endif
 
-#if defined(MODE_DMR)
   if (m_modemState == STATE_DMRCAL || m_modemState == STATE_LFCAL || m_modemState == STATE_DMRCAL1K || m_modemState == STATE_DMRDMO1K)
     calDMR.process();
-#endif
 
-#if defined(MODE_FM)
   if (m_modemState == STATE_FMCAL10K || m_modemState == STATE_FMCAL12K || m_modemState == STATE_FMCAL15K || m_modemState == STATE_FMCAL20K || m_modemState == STATE_FMCAL25K || m_modemState == STATE_FMCAL30K)
     calFM.process();
-#endif
 
-#if defined(MODE_P25)
   if (m_modemState == STATE_P25CAL1K)
     calP25.process();
-#endif
 
-#if defined(MODE_NXDN)
   if (m_modemState == STATE_NXDNCAL1K)
     calNXDN.process();
-#endif
 
-#if defined(MODE_M17)
-  if (m_modemState == STATE_M17CAL)
-    calM17.process();
-#endif
-
-#if defined(MODE_POCSAG)
   if (m_modemState == STATE_POCSAGCAL)
     calPOCSAG.process();
-#endif
 
   if (m_modemState == STATE_IDLE)
     cwIdTX.process();

Makefile

@@ -0,0 +1,383 @@
+#  Copyright (C) 2016,2017,2018 by Andy Uribe CA6JAU
+#  Copyright (C) 2016 by Jim McLaughlin KI6ZUM
+
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+# MMDVM source files
+MMDVM_PATH=.
+
+# STM32 library paths
+F4_LIB_PATH=./STM32F4XX_Lib
+F7_LIB_PATH=./STM32F7XX_Lib
+
+# MCU external clock frequency (Hz)
+CLK_MMDVM_PI=12000000
+CLK_NUCLEO=8000000
+CLK_12MHZ=12000000
+
+# Directory Structure
+BINDIR=bin
+OBJDIR_F4=obj_f4
+OBJDIR_F7=obj_f7
+
+# Output files
+BINELF_F4=mmdvm_f4.elf
+BINHEX_F4=mmdvm_f4.hex
+BINBIN_F4=mmdvm_f4.bin
+BINELF_F7=mmdvm_f7.elf
+BINHEX_F7=mmdvm_f7.hex
+BINBIN_F7=mmdvm_f7.bin
+
+# Header directories
+INC_F4= . $(F4_LIB_PATH)/CMSIS/Include/ $(F4_LIB_PATH)/Device/ $(F4_LIB_PATH)/STM32F4xx_StdPeriph_Driver/include/
+INCLUDES_F4=$(INC_F4:%=-I%)
+INC_F7= . $(F7_LIB_PATH)/CMSIS/Include/ $(F7_LIB_PATH)/Device/ $(F7_LIB_PATH)/STM32F7xx_StdPeriph_Driver/inc/
+INCLUDES_F7=$(INC_F7:%=-I%)
+
+# CMSIS libraries
+INCLUDES_LIBS_F4=$(F4_LIB_PATH)/CMSIS/Lib/GCC/libarm_cortexM4lf_math.a
+INCLUDES_LIBS_F7=$(F7_LIB_PATH)/CMSIS/Lib/GCC/libarm_cortexM7lfsp_math.a
+
+# STM32F4 Standard Peripheral Libraries source path
+STD_LIB_F4=$(F4_LIB_PATH)/STM32F4xx_StdPeriph_Driver/source
+
+# STM32F7 Standard Peripheral Libraries source path
+STD_LIB_F7=$(F7_LIB_PATH)/STM32F7xx_StdPeriph_Driver/src
+
+# STM32F4 system source path
+SYS_DIR_F4=$(F4_LIB_PATH)/Device
+STARTUP_DIR_F4=$(F4_LIB_PATH)/Device/startup
+
+# STM32F7 system source path
+SYS_DIR_F7=$(F7_LIB_PATH)/Device
+STARTUP_DIR_F7=$(F7_LIB_PATH)/Device/startup
+
+# GNU ARM Embedded Toolchain
+CC=arm-none-eabi-gcc
+CXX=arm-none-eabi-g++
+LD=arm-none-eabi-ld
+AR=arm-none-eabi-ar
+AS=arm-none-eabi-as
+CP=arm-none-eabi-objcopy
+OD=arm-none-eabi-objdump
+NM=arm-none-eabi-nm
+SIZE=arm-none-eabi-size
+A2L=arm-none-eabi-addr2line
+
+# "SystemRoot" is only defined in Windows
+ifdef SYSTEMROOT
+	CLEANCMD=del /S *.o *.hex *.bin *.elf GitVersion.h
+	MDDIRS=md $@
+else ifdef SystemRoot
+	CLEANCMD=del /S *.o *.hex *.bin *.elf GitVersion.h
+	MDDIRS=md $@
+else
+	CLEANCMD=rm -f $(OBJ_F4) $(OBJ_F7) $(BINDIR)/*.hex $(BINDIR)/*.bin $(BINDIR)/*.elf GitVersion.h
+	MDDIRS=mkdir $@
+endif
+
+# Default reference oscillator frequencies
+ifndef $(OSC)
+	ifeq ($(MAKECMDGOALS),pi)
+		OSC=$(CLK_MMDVM_PI)
+	else ifeq ($(MAKECMDGOALS),pi-f722)
+		OSC=$(CLK_MMDVM_PI)
+	else ifeq ($(MAKECMDGOALS),drcc_nqf)
+		OSC=$(CLK_12MHZ)
+	else
+		OSC=$(CLK_NUCLEO)
+	endif
+endif
+
+# Build object lists
+CXXSRC=$(wildcard $(MMDVM_PATH)/*.cpp)
+CSRC_STD_F4=$(wildcard $(STD_LIB_F4)/*.c)
+SYS_F4=$(wildcard $(SYS_DIR_F4)/*.c)
+STARTUP_F4=$(wildcard $(STARTUP_DIR_F4)/*.c)
+CSRC_STD_F7=$(wildcard $(STD_LIB_F7)/*.c)
+SYS_F7=$(wildcard $(SYS_DIR_F7)/*.c)
+STARTUP_F7=$(wildcard $(STARTUP_DIR_F7)/*.c)
+OBJ_F4=$(CXXSRC:$(MMDVM_PATH)/%.cpp=$(OBJDIR_F4)/%.o) $(CSRC_STD_F4:$(STD_LIB_F4)/%.c=$(OBJDIR_F4)/%.o) $(SYS_F4:$(SYS_DIR_F4)/%.c=$(OBJDIR_F4)/%.o) $(STARTUP_F4:$(STARTUP_DIR_F4)/%.c=$(OBJDIR_F4)/%.o)
+OBJ_F7=$(CXXSRC:$(MMDVM_PATH)/%.cpp=$(OBJDIR_F7)/%.o) $(CSRC_STD_F7:$(STD_LIB_F7)/%.c=$(OBJDIR_F7)/%.o) $(SYS_F7:$(SYS_DIR_F7)/%.c=$(OBJDIR_F7)/%.o) $(STARTUP_F7:$(STARTUP_DIR_F7)/%.c=$(OBJDIR_F7)/%.o)
+
+# MCU flags
+MCFLAGS_F4=-mcpu=cortex-m4 -mthumb -mlittle-endian -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mthumb-interwork
+MCFLAGS_F7=-mcpu=cortex-m7 -mthumb -mlittle-endian -mfpu=fpv5-sp-d16 -mfloat-abi=hard -mthumb-interwork
+
+# Compile flags
+# STM32F4 Discovery board:
+DEFS_DIS=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F40_41xxx -DSTM32F4_DISCOVERY -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# MMDVM-Pi board:
+DEFS_PI=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F446xx -DSTM32F4_PI -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# MMDVM-F4M F0DEI board:
+DEFS_F4M=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F446xx -DSTM32F4_F4M -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# STM32F4 Nucleo-64 F446RE board:
+DEFS_NUCLEO=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F446xx -DSTM32F4_NUCLEO -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# STM32F7 Nucleo-144 F767ZI board:
+DEFS_NUCLEO_F767=-DUSE_HAL_DRIVER -DSTM32F767xx -DSTM32F7XX -DSTM32F7_NUCLEO -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# MMDVM-Pi F722 board:
+DEFS_PI_F722=-DUSE_HAL_DRIVER -DSTM32F722xx -DSTM32F7XX -DSTM32F722_PI -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# MMDVM-F7M F0DEI board:
+DEFS_F7M=-DUSE_HAL_DRIVER -DSTM32F722xx -DSTM32F7XX -DSTM32F722_F7M -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# MMDVM_RPT_Hat F0DEI, DB9MAT, DF2ET board:
+DEFS_RPT_HAT=-DUSE_HAL_DRIVER -DSTM32F722xx -DSTM32F7XX -DSTM32F722_RPT_HAT -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# STM32F4 DVM board:
+DEFS_DVM=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F446xx -DSTM32F4_DVM -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# MMDVM_RPT_Hat BG4TGO, BG5HHP board:
+DEFS_RPT_HAT_TGO=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F40_41xxx -DSTM32F4_RPT_HAT_TGO -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+# DRCC_DVM BG7NQF board:
+DEFS_DRCC_DVM=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F446xx -DDRCC_DVM -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+
+
+# Build compiler flags
+CFLAGS_F4=-c $(MCFLAGS_F4) $(INCLUDES_F4)
+CXXFLAGS_F4=-c $(MCFLAGS_F4) $(INCLUDES_F4)
+CFLAGS_F7=-c $(MCFLAGS_F7) $(INCLUDES_F7)
+CXXFLAGS_F7=-c $(MCFLAGS_F7) $(INCLUDES_F7)
+
+# Linker flags
+LDFLAGS_F4 =-T stm32f4xx_link.ld $(MCFLAGS_F4) --specs=nosys.specs $(INCLUDES_LIBS_F4)
+LDFLAGS_F767 =-T stm32f767_link.ld $(MCFLAGS_F7) --specs=nosys.specs $(INCLUDES_LIBS_F7)
+LDFLAGS_F722 =-T stm32f722_link.ld $(MCFLAGS_F7) --specs=nosys.specs $(INCLUDES_LIBS_F7)
+
+# Common flags
+CFLAGS=-Os -ffunction-sections -fdata-sections -fno-builtin -Wno-implicit -DCUSTOM_NEW -DNO_EXCEPTIONS
+CXXFLAGS=-Os -fno-exceptions -ffunction-sections -fdata-sections -fno-builtin -fno-rtti -DCUSTOM_NEW -DNO_EXCEPTIONS
+LDFLAGS=-Os --specs=nano.specs -Wl,-Map=bin/mmdvm.map
+
+# Build Rules
+.PHONY: all release dis pi pi-f722 f4m nucleo f767 dvm drcc_nqf clean
+
+# Default target: Nucleo-64 F446RE board
+all: nucleo
+
+pi: GitVersion.h
+pi: CFLAGS+=$(CFLAGS_F4) $(DEFS_PI)
+pi: CXXFLAGS+=$(CXXFLAGS_F4) $(DEFS_PI)
+pi: LDFLAGS+=$(LDFLAGS_F4)
+pi: release_f4
+
+pi-f722: GitVersion.h
+pi-f722: CFLAGS+=$(CFLAGS_F7) $(DEFS_PI_F722)
+pi-f722: CXXFLAGS+=$(CXXFLAGS_F7) $(DEFS_PI_F722)
+pi-f722: LDFLAGS+=$(LDFLAGS_F722)
+pi-f722: release_f7
+
+f4m: GitVersion.h
+f4m: CFLAGS+=$(CFLAGS_F4) $(DEFS_F4M)
+f4m: CXXFLAGS+=$(CXXFLAGS_F4) $(DEFS_F4M)
+f4m: LDFLAGS+=$(LDFLAGS_F4)
+f4m: release_f4
+
+f7m: GitVersion.h
+f7m: CFLAGS+=$(CFLAGS_F7) $(DEFS_F7M)
+f7m: CXXFLAGS+=$(CXXFLAGS_F7) $(DEFS_F7M)
+f7m: LDFLAGS+=$(LDFLAGS_F722)
+f7m: release_f7
+
+rpt_hat: GitVersion.h
+rpt_hat: CFLAGS+=$(CFLAGS_F7) $(DEFS_RPT_HAT)
+rpt_hat: CXXFLAGS+=$(CXXFLAGS_F7) $(DEFS_RPT_HAT)
+rpt_hat: LDFLAGS+=$(LDFLAGS_F722)
+rpt_hat: release_f7
+
+rpt_hat_tgo: GitVersion.h
+rpt_hat_tgo: CFLAGS+=$(CFLAGS_F4) $(DEFS_RPT_HAT_TGO)
+rpt_hat_tgo: CXXFLAGS+=$(CXXFLAGS_F4) $(DEFS_RPT_HAT_TGO)
+rpt_hat_tgo: LDFLAGS+=$(LDFLAGS_F4)
+rpt_hat_tgo: release_f4
+
+nucleo: GitVersion.h
+nucleo: CFLAGS+=$(CFLAGS_F4) $(DEFS_NUCLEO)
+nucleo: CXXFLAGS+=$(CXXFLAGS_F4) $(DEFS_NUCLEO)
+nucleo: LDFLAGS+=$(LDFLAGS_F4)
+nucleo: release_f4
+
+dis: GitVersion.h
+dis: CFLAGS+=$(CFLAGS_F4) $(DEFS_DIS)
+dis: CXXFLAGS+=$(CXXFLAGS_F4) $(DEFS_DIS)
+dis: LDFLAGS+=$(LDFLAGS_F4)
+dis: release_f4
+
+f767: GitVersion.h
+f767: CFLAGS+=$(CFLAGS_F7) $(DEFS_NUCLEO_F767)
+f767: CXXFLAGS+=$(CXXFLAGS_F7) $(DEFS_NUCLEO_F767)
+f767: LDFLAGS+=$(LDFLAGS_F767)
+f767: release_f7
+
+dvm: GitVersion.h
+dvm: CFLAGS+=$(CFLAGS_F4) $(DEFS_DVM)
+dvm: CXXFLAGS+=$(CXXFLAGS_F4) $(DEFS_DVM)
+dvm: LDFLAGS+=$(LDFLAGS_F4)
+dvm: release_f4
+
+drcc_nqf: GitVersion.h
+drcc_nqf: CFLAGS+=$(CFLAGS_F4) $(DEFS_DRCC_DVM) -DDRCC_DVM_NQF
+drcc_nqf: CXXFLAGS+=$(CXXFLAGS_F4) $(DEFS_DRCC_DVM) -DDRCC_DVM_NQF
+drcc_nqf: LDFLAGS+=$(LDFLAGS_F4)
+drcc_nqf: release_f4
+
+release_f4: $(BINDIR)
+release_f4: $(OBJDIR_F4)
+release_f4: $(BINDIR)/$(BINHEX_F4)
+release_f4: $(BINDIR)/$(BINBIN_F4)
+
+release_f7: $(BINDIR)
+release_f7: $(OBJDIR_F7)
+release_f7: $(BINDIR)/$(BINHEX_F7)
+release_f7: $(BINDIR)/$(BINBIN_F7)
+
+$(BINDIR):
+	$(MDDIRS)
+
+$(OBJDIR_F4):
+	$(MDDIRS)
+
+$(OBJDIR_F7):
+	$(MDDIRS)
+
+$(BINDIR)/$(BINHEX_F4): $(BINDIR)/$(BINELF_F4)
+	$(CP) -O ihex $< $@
+	@echo "Objcopy from ELF to IHEX complete!\n"
+
+$(BINDIR)/$(BINBIN_F4): $(BINDIR)/$(BINELF_F4)
+	$(CP) -O binary $< $@
+	@echo "Objcopy from ELF to BINARY complete!\n"
+
+$(BINDIR)/$(BINELF_F4): $(OBJ_F4)
+	$(CXX) $(OBJ_F4) $(LDFLAGS) -o $@
+	@echo "Linking complete!\n"
+	$(SIZE) $(BINDIR)/$(BINELF_F4)
+
+$(BINDIR)/$(BINHEX_F7): $(BINDIR)/$(BINELF_F7)
+	$(CP) -O ihex $< $@
+	@echo "Objcopy from ELF to IHEX complete!\n"
+
+$(BINDIR)/$(BINBIN_F7): $(BINDIR)/$(BINELF_F7)
+	$(CP) -O binary $< $@
+	@echo "Objcopy from ELF to BINARY complete!\n"
+
+$(BINDIR)/$(BINELF_F7): $(OBJ_F7)
+	$(CXX) $(OBJ_F7) $(LDFLAGS) -o $@
+	@echo "Linking complete!\n"
+	$(SIZE) $(BINDIR)/$(BINELF_F7)
+
+$(OBJDIR_F4)/%.o: $(MMDVM_PATH)/%.cpp
+	$(CXX) $(CXXFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+$(OBJDIR_F7)/%.o: $(MMDVM_PATH)/%.cpp
+	$(CXX) $(CXXFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+$(OBJDIR_F4)/%.o: $(STD_LIB_F4)/%.c
+	$(CC) $(CFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+$(OBJDIR_F7)/%.o: $(STD_LIB_F7)/%.c
+	$(CC) $(CFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+$(OBJDIR_F4)/%.o: $(SYS_DIR_F4)/%.c
+	$(CC) $(CFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+$(OBJDIR_F4)/%.o: $(STARTUP_DIR_F4)/%.c
+	$(CC) $(CFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+$(OBJDIR_F7)/%.o: $(SYS_DIR_F7)/%.c
+	$(CC) $(CFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+$(OBJDIR_F7)/%.o: $(STARTUP_DIR_F7)/%.c
+	$(CC) $(CFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+clean:
+	$(CLEANCMD)
+
+deploy:
+ifneq ($(wildcard /usr/bin/openocd),)
+	/usr/bin/openocd -f /usr/share/openocd/scripts/interface/stlink-v2-1.cfg -f /usr/share/openocd/scripts/target/stm32f4x.cfg -c "program bin/$(BINELF_F4) verify reset exit"
+endif
+
+ifneq ($(wildcard /usr/local/bin/openocd),)
+	/usr/local/bin/openocd -f /usr/local/share/openocd/scripts/interface/stlink-v2-1.cfg -f /usr/local/share/openocd/scripts/target/stm32f4x.cfg -c "program bin/$(BINELF_F4) verify reset exit"
+endif
+
+ifneq ($(wildcard /opt/openocd/bin/openocd),)
+	/opt/openocd/bin/openocd -f /opt/openocd/share/openocd/scripts/interface/stlink-v2-1.cfg -f /opt/openocd/share/openocd/scripts/target/stm32f4x.cfg -c "program bin/$(BINELF_F4) verify reset exit"
+endif
+
+deploy-f7:
+ifneq ($(wildcard /usr/bin/openocd),)
+	/usr/bin/openocd -f /usr/share/openocd/scripts/interface/stlink-v2-1.cfg -f /usr/share/openocd/scripts/target/stm32f7x.cfg -c "program bin/$(BINELF_F7) verify reset exit"
+endif
+
+ifneq ($(wildcard /usr/local/bin/openocd),)
+	/usr/local/bin/openocd -f /usr/local/share/openocd/scripts/interface/stlink-v2-1.cfg -f /usr/local/share/openocd/scripts/target/stm32f7x.cfg -c "program bin/$(BINELF_F7) verify reset exit"
+endif
+
+ifneq ($(wildcard /opt/openocd/bin/openocd),)
+	/opt/openocd/bin/openocd -f /opt/openocd/share/openocd/scripts/interface/stlink-v2-1.cfg -f /opt/openocd/share/openocd/scripts/target/stm32f7x.cfg -c "program bin/$(BINELF_F7) verify reset exit"
+endif
+
+deploy-pi:
+ifneq ($(wildcard /usr/local/bin/stm32flash),)
+	-/usr/local/bin/stm32flash -i 20,-21,21:-20,21 /dev/ttyAMA0
+	-/usr/local/bin/stm32ld /dev/ttyAMA0 57600 bin/$(BINBIN_F4)
+	/usr/local/bin/stm32flash -v -w bin/$(BINBIN_F4) -g 0x0 -R -c /dev/ttyAMA0
+endif
+
+ifneq ($(wildcard /usr/bin/stm32flash),)
+	-/usr/bin/stm32flash -i 20,-21,21:-20,21 /dev/ttyAMA0
+	-/usr/bin/stm32ld /dev/ttyAMA0 57600 bin/$(BINBIN_F4)
+	/usr/bin/stm32flash -v -w bin/$(BINBIN_F4) -g 0x0 -R -c /dev/ttyAMA0
+endif
+
+deploy-f4m: deploy-pi
+deploy-dvm: deploy-pi
+
+deploy-pi-f7:
+ifneq ($(wildcard /usr/local/bin/stm32flash),)
+	-/usr/local/bin/stm32flash -i 20,-21,21:-20,21 /dev/ttyAMA0
+	/usr/local/bin/stm32flash -v -w bin/$(BINBIN_F7) -g 0x0 -R -c /dev/ttyAMA0
+
+else ifneq ($(wildcard /usr/bin/stm32flash),)
+	-/usr/bin/stm32flash -i 20,-21,21:-20,21 /dev/ttyAMA0
+	/usr/bin/stm32flash -v -w bin/$(BINBIN_F7) -g 0x0 -R -c /dev/ttyAMA0
+endif
+
+deploy-f7m:   deploy-pi-f7
+deploy-rpt_hat: deploy-pi-f7
+
+# Export the current git version if the index file exists, else 000...
+GitVersion.h:
+ifdef SYSTEMROOT
+	echo #define GITVERSION "0000000" > $@
+else ifdef SystemRoot
+	echo #define GITVERSION "0000000" > $@
+else
+ifneq ("$(wildcard .git/index)","")
+	echo "#define GITVERSION \"$(shell git rev-parse --short HEAD)\"" > $@
+else
+	echo "#define GITVERSION \"0000000\"" > $@
+endif
+endif
+
+flash_f4:
+	@echo "flashing firmware..."
+	st-flash write bin/$(BINBIN_F4) 0x8000000

Makefile.Arduino

@@ -0,0 +1,189 @@
+#!/usr/bin/make
+# makefile for the arduino due (works with arduino IDE 1.6.11)
+#
+# The original file can be found at https://github.com/pauldreik/arduino-due-makefile
+#
+# USAGE: put this file in the same dir as your .ino file is.
+# configure the PORT variable and ADIR at the top of the file
+# to match your local configuration.
+# Type make upload to compile and upload.
+#
+
+#user specific settings:
+#where to find the IDE
+ADIR:=$(HOME)/.arduino15
+#which serial port to use (add a file with SUBSYSTEMS=="usb",
+#ATTRS{product}=="Arduino Due Prog. Port", ATTRS{idProduct}=="003d",
+#ATTRS{idVendor}=="2341", SYMLINK+="arduino_due" in /etc/udev/rules.d/
+#to get this working). Do not prefix the port with /dev/, just take
+#the basename.
+PORT:=ttyACM0
+#if you want to verify the bossac upload, define this to -v
+VERIFY:=-v
+
+
+#end of user configuration.
+
+
+#then some general settings. They should not be necessary to modify.
+#CXX:=$(ADIR)/tools/g++_arm_none_eabi/bin/arm-none-eabi-g++
+CXX:=$(ADIR)/packages/arduino/tools/arm-none-eabi-gcc/4.8.3-2014q1/bin/arm-none-eabi-g++
+#CC:=$(ADIR)/tools/g++_arm_none_eabi/bin/arm-none-eabi-gcc
+CC:=$(ADIR)/packages/arduino/tools/arm-none-eabi-gcc/4.8.3-2014q1/bin/arm-none-eabi-gcc
+OBJCOPY:=$(ADIR)/packages/arduino/tools/arm-none-eabi-gcc/4.8.3-2014q1/bin/arm-none-eabi-objcopy
+
+C:=$(CC)
+#SAM:=arduino/sam/
+SAM:=$(ADIR)/packages/arduino/hardware/sam/1.6.11
+#CMSIS:=arduino/sam/system/CMSIS/
+#LIBSAM:=arduino/sam/system/libsam
+TMPDIR:=$(PWD)/build
+AR:=$(ADIR)/tools/g++_arm_none_eabi/bin/arm-none-eabi-ar 
+AR:=$(ADIR)/packages/arduino/tools/arm-none-eabi-gcc/4.8.3-2014q1/bin/arm-none-eabi-ar
+
+
+#all these values are hard coded and should maybe be configured somehow else,
+#like olikraus does in his makefile.
+DEFINES:=-Dprintf=iprintf -DF_CPU=84000000  -DARDUINO=10611 -D__SAM3X8E__ -DUSB_PID=0x003e -DUSB_VID=0x2341 -DUSBCON \
+         -DARDUINO_SAM_DUE -DARDUINO_ARCH_SAM '-DUSB_MANUFACTURER="Arduino LLC"' '-DUSB_PRODUCT="Arduino Due"' \
+         -DMADEBYMAKEFILE
+
+INCLUDES:=-I$(SAM)/system/libsam -I$(SAM)/system/CMSIS/CMSIS/Include/ \
+          -I$(SAM)/system/CMSIS/Device/ATMEL/ -I$(SAM)/cores/arduino \
+          -I$(SAM)/variants/arduino_due_x
+
+#also include the current dir for convenience
+INCLUDES += -I.
+
+#compilation flags common to both c and c++ 
+COMMON_FLAGS:=-g -Os -w -ffunction-sections -fdata-sections -nostdlib \
+              --param max-inline-insns-single=500 -mcpu=cortex-m3 -mthumb \
+               -fno-threadsafe-statics
+#for compiling c (do not warn, this is not our code)
+CFLAGS:=$(COMMON_FLAGS) -std=gnu11
+#for compiling c++
+CXXFLAGS:=$(COMMON_FLAGS) -fno-rtti -fno-exceptions -std=gnu++11 -Wall -Wextra
+
+#let the results be named after the project
+PROJNAME:=$(shell basename *.ino .ino)
+
+#we will make a new mainfile from the ino file.
+NEWMAINFILE:=$(TMPDIR)/$(PROJNAME).ino.cpp
+
+#our own sourcefiles is the (converted) ino file and any local cpp files
+MYSRCFILES:=$(NEWMAINFILE) $(shell ls *.cpp 2>/dev/null)
+MYOBJFILES:=$(addsuffix .o,$(addprefix $(TMPDIR)/,$(notdir $(MYSRCFILES))))
+
+#These source files are the ones forming core.a
+CORESRCXX:=$(shell ls ${SAM}/cores/arduino/*.cpp ${SAM}/cores/arduino/USB/*.cpp  ${SAM}/variants/arduino_due_x/variant.cpp)
+CORESRC:=$(shell ls ${SAM}/cores/arduino/*.c)
+
+#hey this one is needed too: $(SAM)/cores/arduino/wiring_pulse_asm.S" add -x assembler-with-cpp
+#and this one: /1.6.11/cores/arduino/avr/dtostrf.c but it seems to work
+#anyway, probably because I do not use that functionality.
+
+#convert the core source files to object files. assume no clashes.
+COREOBJSXX:=$(addprefix $(TMPDIR)/core/,$(notdir $(CORESRCXX)) )
+COREOBJSXX:=$(addsuffix .o,$(COREOBJSXX))
+COREOBJS:=$(addprefix $(TMPDIR)/core/,$(notdir $(CORESRC)) )
+COREOBJS:=$(addsuffix .o,$(COREOBJS))
+
+default:
+	@echo default rule, does nothing. Try make compile or make upload.
+
+#This rule is good to just make sure stuff compiles, without having to wait
+#for bossac.
+compile: GitVersion.h $(TMPDIR)/$(PROJNAME).elf $(TMPDIR)/$(PROJNAME).bin
+
+#This is a make rule template to create object files from the source files.
+# arg 1=src file
+# arg 2=object file
+# arg 3= XX if c++, empty if c
+define OBJ_template
+$(2): $(1)
+	$(C$(3)) -MD -c $(C$(3)FLAGS) $(DEFINES) $(INCLUDES) $(1) -o $(2)
+endef
+#now invoke the template both for c++ sources
+$(foreach src,$(CORESRCXX), $(eval $(call OBJ_template,$(src),$(addsuffix .o,$(addprefix $(TMPDIR)/core/,$(notdir $(src)))),XX) ) )
+#...and for c sources:
+$(foreach src,$(CORESRC), $(eval $(call OBJ_template,$(src),$(addsuffix .o,$(addprefix $(TMPDIR)/core/,$(notdir $(src)))),) ) )
+
+#and our own c++ sources
+$(foreach src,$(MYSRCFILES), $(eval $(call OBJ_template,$(src),$(addsuffix .o,$(addprefix $(TMPDIR)/,$(notdir $(src)))),XX) ) )
+
+
+clean:
+	test ! -d $(TMPDIR) || rm -rf $(TMPDIR)
+	$(RM) GitVersion.h
+
+.PHONY: .FORCE upload default
+
+$(TMPDIR):
+	mkdir -p $(TMPDIR)
+
+$(TMPDIR)/core:
+	mkdir -p $(TMPDIR)/core
+
+#creates the cpp file from the .ino file
+$(NEWMAINFILE): $(PROJNAME).ino
+	cat $(SAM)/cores/arduino/main.cpp > $(NEWMAINFILE)
+	cat $(PROJNAME).ino >> $(NEWMAINFILE)
+	echo 'extern "C" void __cxa_pure_virtual() {while (true);}' >> $(NEWMAINFILE)
+
+#include the dependencies for our own files
+-include $(MYOBJFILES:.o=.d)
+
+#create the core library from the core objects. Do this EXACTLY as the
+#arduino IDE does it, seems *really* picky about this.
+#Sorry for the hard coding.
+$(TMPDIR)/core.a: $(TMPDIR)/core $(COREOBJS) $(COREOBJSXX)
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/wiring_shift.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/wiring_analog.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/itoa.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/cortex_handlers.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/hooks.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/wiring.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/WInterrupts.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/syscalls_sam3.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/iar_calls_sam3.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/wiring_digital.c.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/Print.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/USARTClass.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/WString.cpp.o
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/PluggableUSB.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/USBCore.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/CDC.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/wiring_pulse.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/UARTClass.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/main.cpp.o
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/new.cpp.o
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/watchdog.cpp.o
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/Stream.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/RingBuffer.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/IPAddress.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/Reset.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/WMath.cpp.o 
+	$(AR) rcs $(TMPDIR)/core.a $(TMPDIR)/core/variant.cpp.o
+
+#link our own object files with core to form the elf file
+$(TMPDIR)/$(PROJNAME).elf: $(TMPDIR)/core.a $(TMPDIR)/core/syscalls_sam3.c.o $(MYOBJFILES) 
+	$(CC) -mcpu=cortex-m3 -mthumb -Os -Wl,--gc-sections -T$(SAM)/variants/arduino_due_x/linker_scripts/gcc/flash.ld -Wl,-Map,$(NEWMAINFILE).map -o $@ -L$(TMPDIR) -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--start-group -u _sbrk -u link -u _close -u _fstat -u _isatty -u _lseek -u _read -u _write -u _exit -u kill -u _getpid $(MYOBJFILES) $(TMPDIR)/core/variant.cpp.o $(SAM)/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a $(SAM)/system/CMSIS/CMSIS/Lib/GCC/libarm_cortexM3l_math.a $(TMPDIR)/core.a -Wl,--end-group -lm -gcc
+
+#copy from the hex to our bin file (why?)
+$(TMPDIR)/$(PROJNAME).bin: $(TMPDIR)/$(PROJNAME).elf 
+	$(OBJCOPY) -O binary $< $@
+
+#upload to the arduino by first resetting it (stty) and the running bossac
+upload: compile
+	stty -F /dev/$(PORT) cs8 1200 hupcl
+	$(ADIR)/packages/arduino/tools/bossac/1.6.1-arduino/bossac -i --port=$(PORT) -U false -e -w $(VERIFY) -b $(TMPDIR)/$(PROJNAME).bin -R
+
+# Export the current git version if the index file exists, else 000...
+GitVersion.h: .FORCE
+ifneq ("$(wildcard .git/index)","")
+	echo "#define GITVERSION \"$(shell git rev-parse --short HEAD)\"" > $@
+else
+	echo "#define GITVERSION \"0000000\"" > $@
+endif
+
+.FORCE:

Makefile.CMSIS

@@ -0,0 +1,165 @@
+# The name for the project
+TARGET:=mmdvm
+
+# The CPU architecture (will be used for -mcpu)
+MCPU:=cortex-m3
+MCU:=STM32F105xC
+
+# The source files of the project
+CSRC:=
+CXXSRC:=$(wildcard *.cpp)
+
+# Include directory for the system include files and system source file
+SYSDIR:=system_stm32f1xx
+SYSSRC:=$(SYSDIR)/system_stm32f1xx.c
+
+# Other include directories
+INCDIR:=
+
+# Definitions
+CDEFS:=
+CXXDEFS:=
+
+# The name of the startup file which matches to the architecture (MCPU)
+STARTUP:=$(SYSDIR)/startup_stm32f105xc.S
+STARTUP_DEFS=
+
+# Include directory for CMSIS
+CMSISDIR:=STM32F10X_Lib/CMSIS
+
+# Libraries
+LIBDIR:=
+LIBS:=-larm_cortexM3l_math
+
+# Name of the linker script
+LDSCRIPT:=$(SYSDIR)/gcc.ld
+
+# Target objects and binaries directory
+OBJDIR:=obj
+BINDIR:=bin
+
+# Port definition for programming via bootloader (using stm32flash)
+BL_PORT:=ttyUSB0
+
+
+
+# Internal Variables
+ELF:=$(BINDIR)/$(TARGET).elf
+HEX:=$(BINDIR)/$(TARGET).hex
+DIS:=$(BINDIR)/$(TARGET).dis
+MAP:=$(BINDIR)/$(TARGET).map
+OBJ:=$(CSRC:%.c=$(OBJDIR)/%.o) $(CXXSRC:%.cpp=$(OBJDIR)/%.o)
+OBJ+=$(SYSSRC:$(SYSDIR)/%.c=$(OBJDIR)/%.o) $(STARTUP:$(SYSDIR)/%.S=$(OBJDIR)/%.o)
+
+# Replace standard build tools by arm tools
+CC:=arm-none-eabi-gcc
+CXX:=arm-none-eabi-g++
+AS:=arm-none-eabi-gcc
+LD:=arm-none-eabi-g++
+OBJCOPY:=arm-none-eabi-objcopy
+OBJDUMP:=arm-none-eabi-objdump
+SIZE:=arm-none-eabi-size
+
+# Common flags
+COMMON_FLAGS =-mthumb -mlittle-endian -mcpu=$(MCPU)
+COMMON_FLAGS+= -Wall
+COMMON_FLAGS+= -I. -I$(CMSISDIR)/Include -I$(CMSISDIR)/Device/ST/STM32F1xx/Include -I$(SYSDIR)
+COMMON_FLAGS+=  $(addprefix -I,$(INCDIR))
+COMMON_FLAGS+= -D$(MCU) -DMADEBYMAKEFILE -DSTM32F1
+COMMON_FLAGS+= -Os -flto -ffunction-sections -fdata-sections
+COMMON_FLAGS+= -g
+# Assembler flags
+ASFLAGS:=$(COMMON_FLAGS)
+# C flags
+CFLAGS:=$(COMMON_FLAGS) $(addprefix -D,$(CDEFS))
+CFLAGS+= -std=gnu11 -nostdlib
+# CXX flags
+CXXFLAGS:=$(COMMON_FLAGS) $(addprefix -D,$(CXXDEFS))
+CXXFLAGS+= -nostdlib -fno-exceptions -fno-rtti
+# LD flags
+LDFLAGS:=$(COMMON_FLAGS) -Wl,--gc-sections -Wl,-Map=$(MAP) -Wl,--no-wchar-size-warning
+LDFLAGS+= --specs=nosys.specs --specs=nano.specs
+LDFLAGS+= -L$(CMSISDIR)/Lib/GCC/ $(addprefix -L,$(LIBDIR))
+LDLIBS:=-T$(LDSCRIPT) $(LIBS)
+
+# Dependecies
+DEPENDS:=$(CSRC:%.c=$(OBJDIR)/%.d) $(CXXSRC:%.cpp=$(OBJDIR)/%.d)
+
+
+# Additional Suffixes
+.SUFFIXES: .elf .hex
+
+# Targets
+.PHONY: all
+all: GitVersion.h $(DIS) $(HEX)
+	$(SIZE) $(ELF)
+
+.PHONY: program
+program: $(HEX) $(ELF)
+	openocd -f openocd.cfg \
+					-c "program $(HEX) verify reset exit"
+	$(SIZE) $(ELF)
+
+.PHONY: program_bl
+program_bl: $(HEX) $(ELF)
+	stm32flash -w $(HEX) -v /dev/$(BL_PORT)
+	$(SIZE) $(ELF)
+
+.PHONY: run
+run: $(HEX) $(ELF)
+	openocd -f openocd.cfg \
+					-c "init" -c "reset" -c "exit"
+
+.PHONY: debug
+debug: $(ELF)
+	./debug.sh $(ELF)
+
+.PHONY: clean
+clean:
+	$(RM) $(OBJ) $(HEX) $(ELF) $(DIS) $(MAP) $(DEPENDS) GitVersion.h
+
+# implicit rules
+.elf.hex:
+	$(OBJCOPY) -O ihex $< $@
+
+$(OBJDIR)/%.o: %.c
+	$(CC) -MMD $(CFLAGS) -c $< -o $@
+
+$(OBJDIR)/%.o: %.cpp
+	$(CXX) -MMD $(CXXFLAGS) -c $< -o $@
+
+$(OBJDIR)/%.o: $(SYSDIR)/%.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(OBJDIR)/%.o: $(SYSDIR)/%.S
+	$(AS) $(ASFLAGS) -c $< -o $@
+
+# explicit rules
+$(OBJDIR):
+	mkdir -p $(OBJDIR)
+
+$(BINDIR):
+	mkdir -p $(BINDIR)
+
+$(ELF): $(OBJDIR) $(BINDIR) $(OBJ)
+	$(LD) $(OBJ) $(LDFLAGS) $(LDLIBS) -o $@
+
+$(DIS): $(ELF)
+	$(OBJDUMP) -S $< > $@
+
+# include dependecies
+-include $(DEPENDS)
+
+# Export the current git version if the index file exists, else 000...
+GitVersion.h:
+ifdef SYSTEMROOT
+	echo #define GITVERSION "0000000" > $@
+else ifdef SystemRoot
+	echo #define GITVERSION "0000000" > $@
+else
+ifneq ("$(wildcard .git/index)","")
+	echo "#define GITVERSION \"$(shell git rev-parse --short HEAD)\"" > $@
+else
+	echo "#define GITVERSION \"0000000\"" > $@
+endif
+endif

NXDNRX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2018 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_NXDN)
-
 #include "Globals.h"
 #include "NXDNRX.h"
 #include "Utils.h"
@@ -406,5 +403,3 @@ void CNXDNRX::writeRSSIData(uint8_t* data)
   m_rssiCount = 0U;
 }
 
-#endif
-

NXDNRX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017,2018 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,13 +16,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_NXDN)
-
 #if !defined(NXDNRX_H)
 #define  NXDNRX_H
 
+#include "Config.h"
 #include "NXDNDefines.h"
 
 enum NXDNRX_STATE {
@@ -70,5 +67,3 @@ private:
 
 #endif
 
-#endif
-

NXDNTX.cpp

@@ -18,9 +18,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_NXDN)
-
 #include "Globals.h"
 #include "NXDNTX.h"
 
@@ -84,8 +81,7 @@ void CNXDNTX::process()
       m_poBuffer[m_poLen++] = NXDN_PREAMBLE[2U];
     } else {
       for (uint8_t i = 0U; i < NXDN_FRAME_LENGTH_BYTES; i++) {
-        uint8_t c = 0U;
-        m_buffer.get(c);
+        uint8_t c = m_buffer.get();
         m_poBuffer[m_poLen++] = c;
       }
     }
@@ -126,7 +122,7 @@ void CNXDNTX::process()
   }
 }
 
-uint8_t CNXDNTX::writeData(const uint8_t* data, uint16_t length)
+uint8_t CNXDNTX::writeData(const uint8_t* data, uint8_t length)
 {
   if (length != (NXDN_FRAME_LENGTH_BYTES + 1U))
     return 4U;
@@ -203,6 +199,3 @@ void CNXDNTX::setParams(uint8_t txHang)
 {
   m_txHang = txHang * 600U;
 }
-
-#endif
-

NXDNTX.h

@@ -16,20 +16,18 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_NXDN)
-
 #if !defined(NXDNTX_H)
 #define  NXDNTX_H
 
-#include "RingBuffer.h"
+#include "Config.h"
+
+#include "SerialRB.h"
 
 class CNXDNTX {
 public:
   CNXDNTX();
 
-  uint8_t writeData(const uint8_t* data, uint16_t length);
+  uint8_t writeData(const uint8_t* data, uint8_t length);
 
   void process();
 
@@ -40,7 +38,7 @@ public:
   void setParams(uint8_t txHang);
 
 private:
-  CRingBuffer<uint8_t>                        m_buffer;
+  CSerialRB                        m_buffer;
   arm_fir_interpolate_instance_q15 m_modFilter;
   arm_fir_instance_q15             m_sincFilter;
   q15_t                            m_modState[16U];    // blockSize + phaseLength - 1, 4 + 9 - 1 plus some spare
@@ -57,6 +55,3 @@ private:
 };
 
 #endif
-
-#endif
-

P25RX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2018 by Bryan Biedenkapp <gatekeep@gmail.com>
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -18,9 +18,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_P25)
-
 #include "Globals.h"
 #include "P25RX.h"
 #include "Utils.h"
@@ -538,6 +535,3 @@ void CP25RX::writeRSSILdu(uint8_t* ldu)
   m_rssiAccum = 0U;
   m_rssiCount = 0U;
 }
-
-#endif
-

P25RX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016,2017,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
  *   Copyright (C) 2018 by Bryan Biedenkapp <gatekeep@gmail.com>
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -17,13 +17,10 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_P25)
-
 #if !defined(P25RX_H)
 #define  P25RX_H
 
+#include "Config.h"
 #include "P25Defines.h"
 
 enum P25RX_STATE {
@@ -75,6 +72,3 @@ private:
 };
 
 #endif
-
-#endif
-

P25TX.cpp

@@ -18,9 +18,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_P25)
-
 #include "Globals.h"
 #include "P25TX.h"
 
@@ -78,11 +75,9 @@ void CP25TX::process()
       for (uint16_t i = 0U; i < m_txDelay; i++)
         m_poBuffer[m_poLen++] = P25_START_SYNC;
     } else {
-      uint8_t length = 0U;
-      m_buffer.get(length);
+      uint8_t length = m_buffer.get();
       for (uint8_t i = 0U; i < length; i++) {
-        uint8_t c = 0U;
-        m_buffer.get(c);
+        uint8_t c = m_buffer.get();
         m_poBuffer[m_poLen++] = c;
       }
     }
@@ -123,7 +118,7 @@ void CP25TX::process()
   }
 }
 
-uint8_t CP25TX::writeData(const uint8_t* data, uint16_t length)
+uint8_t CP25TX::writeData(const uint8_t* data, uint8_t length)
 {
   if (length < (P25_TERM_FRAME_LENGTH_BYTES + 1U))
     return 4U;
@@ -201,6 +196,3 @@ void CP25TX::setParams(uint8_t txHang)
 {
   m_txHang = txHang * 1200U;
 }
-
-#endif
-

P25TX.h

@@ -16,20 +16,18 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_P25)
-
 #if !defined(P25TX_H)
 #define  P25TX_H
 
-#include "RingBuffer.h"
+#include "Config.h"
+
+#include "SerialRB.h"
 
 class CP25TX {
 public:
   CP25TX();
 
-  uint8_t writeData(const uint8_t* data, uint16_t length);
+  uint8_t writeData(const uint8_t* data, uint8_t length);
 
   void process();
 
@@ -40,7 +38,7 @@ public:
   void setParams(uint8_t txHang);
 
 private:
-  CRingBuffer<uint8_t>                        m_buffer;
+  CSerialRB                        m_buffer;
   arm_fir_interpolate_instance_q15 m_modFilter;
   arm_fir_instance_q15             m_lpFilter;
   q15_t                            m_modState[16U];    // blockSize + phaseLength - 1, 4 + 9 - 1 plus some spare
@@ -57,6 +55,3 @@ private:
 };
 
 #endif
-
-#endif
-

POCSAGTX.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2009-2018,2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2009-2018 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include "Config.h"
-
-#if defined(MODE_POCSAG)
-
 #include "Globals.h"
 #include "POCSAGTX.h"
 
@@ -64,8 +61,7 @@ void CPOCSAGTX::process()
         m_poBuffer[m_poLen++] = POCSAG_SYNC;
     } else {
       for (uint8_t i = 0U; i < POCSAG_FRAME_LENGTH_BYTES; i++) {
-        uint8_t c = 0U;
-        m_buffer.get(c);
+        uint8_t c = m_buffer.get();
         m_poBuffer[m_poLen++] = c;
       }
     }
@@ -99,7 +95,7 @@ bool CPOCSAGTX::busy()
     return false;
 }
 
-uint8_t CPOCSAGTX::writeData(const uint8_t* data, uint16_t length)
+uint8_t CPOCSAGTX::writeData(const uint8_t* data, uint8_t length)
 {
   if (length != POCSAG_FRAME_LENGTH_BYTES)
     return 4U;
@@ -151,5 +147,3 @@ uint8_t CPOCSAGTX::getSpace() const
   return m_buffer.getSpace() / POCSAG_FRAME_LENGTH_BYTES;
 }
 
-#endif
-

POCSAGTX.h

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015-2020 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015-2019 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -16,20 +16,18 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "Config.h"
-
-#if defined(MODE_POCSAG)
-
 #if !defined(POCSAGTX_H)
 #define  POCSAGTX_H
 
-#include "RingBuffer.h"
+#include "Config.h"
+
+#include "SerialRB.h"
 
 class CPOCSAGTX {
 public:
   CPOCSAGTX();
 
-  uint8_t writeData(const uint8_t* data, uint16_t length);
+  uint8_t writeData(const uint8_t* data, uint8_t length);
 
   void writeByte(uint8_t c);
 
@@ -42,7 +40,7 @@ public:
   bool busy();
 
 private:
-  CRingBuffer<uint8_t>            m_buffer;
+  CSerialRB            m_buffer;
   arm_fir_instance_q15 m_modFilter;
   q15_t                m_modState[170U];     // NoTaps + BlockSize - 1, 6 + 160 - 1 plus some spare
   uint8_t              m_poBuffer[200U];
@@ -53,5 +51,3 @@ private:
 
 #endif
 
-#endif
-

README.md

@@ -1,35 +1,7 @@
-This is the source code of the MMDVM firmware that supports D-Star, DMR, System Fusion, P25, NXDN, M17, POCSAG, AX.25, and FM modes.
+This is the source code of the MMDVM firmware that supports D-Star, DMR, System Fusion, P25, NXDN, and POCSAG modes.
 
-It runs on the Arduino Due, the ST-Micro STM32F4xxx and STM32F7xxx processors, as well as the Teensy 3.5/3.6. What these platforms have in common is the use of an ARM Cortex-M3, M4, or M7 processors with a minimum clock speed greater of 80 MHz, and access to at least one analogue to digital converter, one digital to analogue converter, as well as a number of GPIO pins.
+It runs on the Arduino Due, the ST-Micro STM32F1xxx, STM32F4xxx and STM32F7xxx processors, as well as the Teensy 3.1/3.2/3.5/3.6. What these platforms have in common is the use of an ARM Cortex-M3 or M4 processor with a clock speed greater than 70 MHz, and access to at least one analogue to digital converter and one digital to analogue converter.
 
-In order to build this software for the Arduino Due, you will need to edit a file within the Arduino GUI and that is detailed in the BUILD.txt file. The STM32 support is supplied via the ARM GCC compiler. The Teensy support uses Teensyduino.
+In order to build this software for the Arduino Due, you will need to edit a file within the Arduino GUI and that is detailed in the BUILD.txt file. The STM32 support is being supplied via the Coocox IDE with ARM GCC. The Teensy support uses Teensyduino.
 
-This software is licenced under the GPL v2 and is primarily intended for amateur and educational use.
-
-Portions of the ARM support code include the following copyright:
-
-   Copyright (c) 2011 - 2013 ARM LIMITED
-
-   All rights reserved.
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions are met:
-   - Redistributions of source code must retain the above copyright
-     notice, this list of conditions and the following disclaimer.
-   - Redistributions in binary form must reproduce the above copyright
-     notice, this list of conditions and the following disclaimer in the
-     documentation and/or other materials provided with the distribution.
-   - Neither the name of ARM nor the names of its contributors may be used
-     to endorse or promote products derived from this software without
-     specific prior written permission.
-
-   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-   ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
-   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-   POSSIBILITY OF SUCH DAMAGE.
+This software is licenced under the GPL v2 and is intended for amateur and educational use only. Use of this software for commercial purposes is strictly forbidden.

RSSIRB.cpp

@@ -0,0 +1,102 @@
+/*
+TX fifo control - Copyright (C) KI6ZUM 2015
+Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the
+Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+Boston, MA  02110-1301, USA.
+*/
+
+#include "RSSIRB.h"
+
+CRSSIRB::CRSSIRB(uint16_t length) :
+m_length(length),
+m_head(0U),
+m_tail(0U),
+m_full(false),
+m_overflow(false)
+{
+  m_rssi = new uint16_t[length];
+}
+
+uint16_t CRSSIRB::getSpace() const
+{
+  uint16_t n = 0U;
+
+  if (m_tail == m_head)
+    n = m_full ? 0U : m_length;
+  else if (m_tail < m_head)
+    n = m_length - m_head + m_tail;
+  else
+    n = m_tail - m_head;
+
+  if (n > m_length)
+    n = 0U;
+
+  return n;
+}
+
+uint16_t CRSSIRB::getData() const
+{
+  if (m_tail == m_head)
+    return m_full ? m_length : 0U;
+  else if (m_tail < m_head)
+    return m_head - m_tail;
+  else
+    return m_length - m_tail + m_head;
+}
+
+bool CRSSIRB::put(uint16_t rssi)
+{
+  if (m_full) {
+    m_overflow = true;
+    return false;
+  }
+
+  m_rssi[m_head] = rssi;
+
+  m_head++;
+  if (m_head >= m_length)
+    m_head = 0U;
+
+  if (m_head == m_tail)
+    m_full = true;
+
+  return true;
+}
+
+bool CRSSIRB::get(uint16_t& rssi)
+{
+  if (m_head == m_tail && !m_full)
+    return false;
+
+  rssi  = m_rssi[m_tail];
+
+  m_full = false;
+
+  m_tail++;
+  if (m_tail >= m_length)
+    m_tail = 0U;
+
+  return true;
+}
+
+bool CRSSIRB::hasOverflowed()
+{
+  bool overflow = m_overflow;
+
+  m_overflow = false;
+
+  return overflow;
+}

RSSIRB.h

@@ -0,0 +1,59 @@
+/*
+Serial fifo control - Copyright (C) KI6ZUM 2015
+Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the
+Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+Boston, MA  02110-1301, USA.
+*/
+
+#if !defined(RSSIRB_H)
+#define  RSSIRB_H
+
+#if defined(STM32F4XX)
+#include "stm32f4xx.h"
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
+#elif defined(STM32F105xC)
+#include "stm32f1xx.h"
+#include <cstddef>
+#else
+#include <Arduino.h>
+#endif
+
+class CRSSIRB {
+public:
+  CRSSIRB(uint16_t length);
+  
+  uint16_t getSpace() const;
+  
+  uint16_t getData() const;
+
+  bool put(uint16_t rssi);
+
+  bool get(uint16_t& rssi);
+
+  bool hasOverflowed();
+
+private:
+  uint16_t           m_length;
+  volatile uint16_t* m_rssi;
+  volatile uint16_t  m_head;
+  volatile uint16_t  m_tail;
+  volatile bool      m_full;
+  bool               m_overflow;
+};
+
+#endif
+

RingBuff.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2017 Wojciech Krutnik N0CALL
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * FIFO ring buffer
+ * source:
+ * http://stackoverflow.com/questions/6822548/correct-way-of-implementing-a-uart-receive-buffer-in-a-small-arm-microcontroller
+ * (modified)
+ *
+ */
+ 
+#if !defined(RINGBUFF_H)
+#define RINGBUFF_H
+
+#define RINGBUFF_SIZE(ringBuff) (ringBuff.size)    /* serial buffer in bytes (power 2)   */
+#define RINGBUFF_MASK(ringBuff) (ringBuff.size-1U) /* buffer size mask                   */
+
+/* Buffer read / write macros                                                   */
+#define RINGBUFF_RESET(ringBuff)         (ringBuff).rdIdx = ringBuff.wrIdx = 0
+#define RINGBUFF_WRITE(ringBuff, dataIn) (ringBuff).data[RINGBUFF_MASK(ringBuff) & ringBuff.wrIdx++] = (dataIn)
+#define RINGBUFF_READ(ringBuff)          ((ringBuff).data[RINGBUFF_MASK(ringBuff) & ((ringBuff).rdIdx++)])
+#define RINGBUFF_EMPTY(ringBuff)         ((ringBuff).rdIdx == (ringBuff).wrIdx)
+#define RINGBUFF_FULL(ringBuff)          ((RINGBUFF_MASK(ringBuff) & ringFifo.rdIdx) == (RINGBUFF_MASK(ringBuff) & ringFifo.wrIdx))
+#define RINGBUFF_COUNT(ringBuff)         (RINGBUFF_MASK(ringBuff) & ((ringBuff).wrIdx - (ringBuff).rdIdx))
+
+/* Buffer type                                                                  */
+#define DECLARE_RINGBUFFER_TYPE(name, _size)                           \
+          typedef struct{                                              \
+            uint32_t size;                                             \
+            uint32_t wrIdx;                                            \
+            uint32_t rdIdx;                                            \
+            uint8_t data[_size];                                       \
+          }name##_t
+
+#endif

STM32Utils.h

@@ -0,0 +1,50 @@
+/*
+ *   source: http://mightydevices.com/?p=144
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if !defined(STM32UTILS_H)
+#define STM32UTILS_H
+
+#include <stdint.h>
+
+/* ram function */
+#define RAMFUNC __attribute__ ((long_call, section (".data")))
+/* eeprom data */
+/* for placing variables in eeprom memory */
+#define EEMEM 	__attribute__((section(".eeprom")))
+
+/* bitband type */
+typedef volatile uint32_t * const bitband_t;
+
+/* base address for bit banding */
+#define BITBAND_SRAM_REF               		(0x20000000)
+/* base address for bit banding */
+#define BITBAND_SRAM_BASE              		(0x22000000)
+/* base address for bit banding */
+#define BITBAND_PERIPH_REF               	(0x40000000)
+/* base address for bit banding */
+#define BITBAND_PERIPH_BASE              	(0x42000000)
+
+/* sram bit band */
+#define BITBAND_SRAM(address, bit)     ((void*)(BITBAND_SRAM_BASE +   \
+		(((uint32_t)address) - BITBAND_SRAM_REF) * 32 + (bit) * 4))
+
+/* periph bit band */
+#define BITBAND_PERIPH(address, bit)   ((void *)(BITBAND_PERIPH_BASE + \
+		(((uint32_t)address) - BITBAND_PERIPH_REF) * 32 + (bit) * 4))
+
+#endif

SampleRB.cpp

@@ -0,0 +1,106 @@
+/*
+TX fifo control - Copyright (C) KI6ZUM 2015
+Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the
+Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+Boston, MA  02110-1301, USA.
+*/
+
+#include "SampleRB.h"
+
+CSampleRB::CSampleRB(uint16_t length) :
+m_length(length),
+m_head(0U),
+m_tail(0U),
+m_full(false),
+m_overflow(false)
+{
+  m_samples = new uint16_t[length];
+  m_control = new uint8_t[length];
+}
+
+uint16_t CSampleRB::getSpace() const
+{
+  uint16_t n = 0U;
+
+  if (m_tail == m_head)
+    n = m_full ? 0U : m_length;
+  else if (m_tail < m_head)
+    n = m_length - m_head + m_tail;
+  else
+    n = m_tail - m_head;
+
+  if (n > m_length)
+    n = 0U;
+
+  return n;
+}
+
+uint16_t CSampleRB::getData() const
+{
+  if (m_tail == m_head)
+    return m_full ? m_length : 0U;
+  else if (m_tail < m_head)
+    return m_head - m_tail;
+  else
+    return m_length - m_tail + m_head;
+}
+
+bool CSampleRB::put(uint16_t sample, uint8_t control)
+{
+  if (m_full) {
+    m_overflow = true;
+    return false;
+  }
+
+  m_samples[m_head] = sample;
+  m_control[m_head] = control;
+
+  m_head++;
+  if (m_head >= m_length)
+    m_head = 0U;
+
+  if (m_head == m_tail)
+    m_full = true;
+
+  return true;
+}
+
+bool CSampleRB::get(uint16_t& sample, uint8_t& control)
+{
+  if (m_head == m_tail && !m_full)
+    return false;
+
+  sample  = m_samples[m_tail];
+  control = m_control[m_tail];
+
+  m_full = false;
+
+  m_tail++;
+  if (m_tail >= m_length)
+    m_tail = 0U;
+
+  return true;
+}
+
+bool CSampleRB::hasOverflowed()
+{
+  bool overflow = m_overflow;
+
+  m_overflow = false;
+
+  return overflow;
+}
+