Start on the actual AX.25 demodulator.

AX25Demodulator.cpp

@@ -0,0 +1,31 @@
+/*
+ *   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 "AX25Demodulator.h"
+
+CAX25Demodulator::CAX25Demodulator(uint16_t n) :
+m_n(n)
+{
+}
+
+void CAX25Demodulator::process(q15_t sample)
+{
+}
+

AX25Demodulator.h

@@ -0,0 +1,35 @@
+/*
+ *   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(AX25Demodulator_H)
+#define  AX25Demodulator_H
+
+#include "Config.h"
+
+class CAX25Demodulator {
+public:
+  CAX25Demodulator(uint16_t n);
+
+  void process(q15_t sample);
+
+private:
+  uint16_t m_n;
+};
+
+#endif
+

AX25RX.cpp

@@ -20,7 +20,10 @@
 #include "Globals.h"
 #include "AX25RX.h"
 
-CAX25RX::CAX25RX()
+CAX25RX::CAX25RX() :
+m_demod1(1U),
+m_demod2(2U),
+m_demod3(3U)
 {
 }
 
@@ -28,6 +31,10 @@ void CAX25RX::samples(const q15_t* samples, uint8_t length)
 {
   for (uint8_t i = 0U; i < length; i++) {
     q15_t sample = samples[i];
+
+    m_demod1.process(sample);
+    m_demod2.process(sample);
+    m_demod3.process(sample);
   }
 }
 

AX25RX.h

@@ -21,6 +21,8 @@
 
 #include "Config.h"
 
+#include "AX25Demodulator.h"
+
 class CAX25RX {
 public:
   CAX25RX();
@@ -28,6 +30,9 @@ public:
   void samples(const q15_t* samples, uint8_t length);
 
 private:
+  CAX25Demodulator m_demod1;
+  CAX25Demodulator m_demod2;
+  CAX25Demodulator m_demod3;
 };
 
 #endif