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Use the D-Star correlator receiver.

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This commit is contained in:
Jonathan Naylor
2020-11-09 11:50:02 +00:00
parent 46c0958704
commit 31744a237a
7 changed files with 315 additions and 185 deletions
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DStarRX.h
+21 -10
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@@ -1,5 +1,5 @@
/*
* Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
* Copyright (C) 2015,2016,2017,2020 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
@@ -40,13 +40,21 @@ public:
void reset();
private:
uint32_t m_pll;
bool m_prev;
DSRX_STATE m_rxState;
uint32_t m_patternBuffer;
uint8_t m_rxBuffer[100U];
unsigned int m_rxBufferBits;
unsigned int m_dataBits;
uint32_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;
unsigned int m_mar;
int m_pathMetric[4U];
unsigned int m_pathMemory0[42U];
@@ -57,9 +65,12 @@ private:
uint32_t m_rssiAccum;
uint16_t m_rssiCount;
void processNone(bool bit);
void processHeader(bool bit);
void processData(bool bit);
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 writeRSSIHeader(unsigned char* header);
void writeRSSIData(unsigned char* data);
bool rxHeader(uint8_t* in, uint8_t* out);