First compiling version of DMO code, untested.

2026-10-15 00:04:11 +02:00 · 2016-08-23 20:16:46 +01:00
parent d477796903
commit 35ae6b002d
7 changed files with 523 additions and 14 deletions
@@ -0,0 +1,72 @@
+/*
+ *   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
+ *   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(DMRDMORX_H)
+#define  DMRDMORX_H
+
+#include "Config.h"
+#include "DMRDefines.h"
+
+const uint16_t DMO_BUFFER_SIZE = 1440U;   // 60ms at 24 kHz
+
+enum DMORX_STATE {
+  DMORXS_NONE,
+  DMORXS_VOICE,
+  DMORXS_DATA
+};
+
+class CDMRDMORX {
+public:
+  CDMRDMORX();
+
+  void start();
+
+  void samples(const q15_t* samples, uint8_t length);
+
+  void setColorCode(uint8_t colorCode);
+
+  void reset();
+
+private:
+  uint32_t    m_bitBuffer[DMR_RADIO_SYMBOL_LENGTH];
+  q15_t       m_buffer[DMO_BUFFER_SIZE];
+  uint16_t    m_bitPtr;
+  uint16_t    m_dataPtr;
+  uint16_t    m_syncPtr;
+  uint16_t    m_startPtr;
+  uint16_t    m_endPtr;
+  q31_t       m_maxCorr;
+  q15_t       m_centre[4U];
+  q15_t       m_threshold[4U];
+  uint8_t     m_averagePtr;
+  uint8_t     m_control;
+  uint8_t     m_syncCount;
+  uint8_t     m_colorCode;
+  DMORX_STATE m_state;
+  uint8_t     m_n;
+  uint8_t     m_type;
+  uint16_t    m_rssiCount;
+  uint16_t    m_rssi;
+
+  bool processSample(q15_t sample);
+  void correlateSync(bool first);
+  void samplesToBits(uint16_t start, uint8_t count, uint8_t* buffer, uint16_t offset, q15_t centre, q15_t threshold);
+};
+
+#endif
+