Superminaren/MMDVM
1
0
Fork 0
mirror of https://github.com/g4klx/MMDVM.git synced 2026-10-25 02:45:00 +01:00
Code Issues Packages Projects Releases Wiki Activity

Update 48k version

Browse Source 
In to NXDN possible problem on sinc filter anc isinc filter, think they must be recalculated but do not know how to do it. On D-STAR, DMR, C4FM and P25 it work.
This commit is contained in:
LucaMarche IZ1MLT
2018-05-30 08:54:45 +02:00
committed by GitHub
parent 62f3e01aa5
commit 694b83123a
75 changed files with 7038 additions and 2324 deletions
Download Patch File Download Diff File Expand all files Collapse all files
P25RX.h
+32 -16
View File
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2015,2016 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
* it under the terms of the GNU General Public License as published by
@@ -24,35 +25,50 @@
enum P25RX_STATE {
P25RXS_NONE,
P25RXS_DATA
P25RXS_HDR,
P25RXS_LDU
};
class CP25RX {
public:
CP25RX();
void samples(const q15_t* samples, uint8_t length);
void samples(const q15_t* samples, uint16_t* rssi, uint8_t length);
void reset();
private:
uint32_t m_pll;
bool m_prev;
P25RX_STATE m_state;
uint32_t m_symbolBuffer;
uint64_t m_bitBuffer;
q15_t m_symbols[P25_SYNC_LENGTH_SYMBOLS];
uint8_t m_outBuffer[P25_LDU_FRAME_LENGTH_BYTES + 3U];
uint8_t* m_buffer;
uint16_t m_bufferPtr;
uint16_t m_symbolPtr;
uint32_t m_bitBuffer[P25_RADIO_SYMBOL_LENGTH];
q15_t m_buffer[P25_LDU_FRAME_LENGTH_SAMPLES];
uint16_t m_bitPtr;
uint16_t m_dataPtr;
uint16_t m_hdrStartPtr;
uint16_t m_lduStartPtr;
uint16_t m_lduEndPtr;
uint16_t m_minSyncPtr;
uint16_t m_maxSyncPtr;
uint16_t m_hdrSyncPtr;
uint16_t m_lduSyncPtr;
q31_t m_maxCorr;
uint16_t m_lostCount;
q15_t m_centre;
q15_t m_threshold;
uint8_t m_countdown;
q15_t m_centre[16U];
q15_t m_centreVal;
q15_t m_threshold[16U];
q15_t m_thresholdVal;
uint8_t m_averagePtr;
uint32_t m_rssiAccum;
uint16_t m_rssiCount;
uint8_t m_duid;
void processNone(q15_t sample);
void processData(q15_t sample);
void processHdr(q15_t sample);
void processLdu(q15_t sample);
bool correlateSync();
void calculateLevels(uint16_t start, uint16_t count);
void samplesToBits(uint16_t start, uint16_t count, uint8_t* buffer, uint16_t offset, q15_t centre, q15_t threshold);
void writeRSSILdu(uint8_t* ldu);
};
#endif