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Revert the demodulator lock stiffening for D-Star and System Fusion.

This commit is contained in:
Jonathan Naylor 2016-03-29 17:49:52 +01:00
parent 2c11137d27
commit 428dcaa7d6
4 changed files with 17 additions and 41 deletions
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28
DStarRX.cpp
View File

@ -25,10 +25,9 @@
const unsigned int BUFFER_LENGTH = 200U;
const uint32_t PLLMAX = 0x10000U;
const uint32_t PLLINC = PLLMAX / DSTAR_RADIO_BIT_LENGTH;
const uint32_t INC_LOCK = PLLINC / 64U;
const uint32_t INC_UNLOCK = PLLINC / 32U;
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 = 50U * DSTAR_DATA_LENGTH_BITS;
@ -244,7 +243,6 @@ const uint16_t CCITT_TABLE[] = {
CDStarRX::CDStarRX() :
m_pll(0U),
m_prev(false),
m_inc(INC_UNLOCK),
m_rxState(DSRXS_NONE),
m_patternBuffer(0x00U),
m_rxBuffer(),
@ -266,7 +264,6 @@ void CDStarRX::reset()
{
m_pll = 0U;
m_prev = false;
m_inc = INC_UNLOCK;
m_rxState = DSRXS_NONE;
m_patternBuffer = 0x00U;
m_rxBufferBits = 0U;
@ -283,9 +280,9 @@ void CDStarRX::samples(const q15_t* samples, uint8_t length)
if (bit != m_prev) {
if (m_pll < (PLLMAX / 2U))
m_pll += m_inc;
m_pll += INC;
else
m_pll -= m_inc;
m_pll -= INC;
}
m_prev = bit;
@ -336,7 +333,7 @@ void CDStarRX::processNone(bool bit)
// 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");
locked(true);
io.setDecode(true);
#if defined(WANT_DEBUG)
q15_t min = 16000;
@ -376,7 +373,7 @@ void CDStarRX::processHeader(bool bit)
unsigned char header[DSTAR_HEADER_LENGTH_BYTES];
bool ok = rxHeader(m_rxBuffer, header);
if (ok) {
locked(true);
io.setDecode(true);
serial.writeDStarHeader(header, DSTAR_HEADER_LENGTH_BYTES);
@ -404,7 +401,7 @@ void CDStarRX::processData(bool bit)
// Fuzzy matching of the end frame sequences
if (countBits32((m_patternBuffer & END_SYNC_MASK) ^ END_SYNC_DATA) <= END_SYNC_ERRS) {
DEBUG1("DStarRX: Found end sync in Data");
locked(false);
io.setDecode(false);
serial.writeDStarEOT();
@ -443,7 +440,7 @@ void CDStarRX::processData(bool bit)
m_dataBits--;
if (m_dataBits == 0U) {
DEBUG1("DStarRX: data sync timed out, lost lock");
locked(false);
io.setDecode(false);
serial.writeDStarLost();
@ -696,10 +693,3 @@ 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];
}
void CDStarRX::locked(bool lock)
{
io.setDecode(lock);
m_inc = lock ? INC_LOCK : INC_UNLOCK;
}

2
DStarRX.h
View File

@ -39,7 +39,6 @@ public:
private:
uint32_t m_pll;
bool m_prev;
uint32_t m_inc;
DSRX_STATE m_rxState;
uint32_t m_patternBuffer;
uint8_t m_rxBuffer[100U];
@ -63,7 +62,6 @@ private:
void viterbiDecode(int* data);
void traceBack();
bool checksum(const uint8_t* header) const;
void locked(bool lock);
};
#endif

26
YSFRX.cpp
View File

@ -27,10 +27,9 @@ const unsigned int BUFFER_LENGTH = 200U;
const q15_t SCALING_FACTOR = 19505; // Q15(0.60)
const uint32_t PLLMAX = 0x10000U;
const uint32_t PLLINC = PLLMAX / YSF_RADIO_SYMBOL_LENGTH;
const uint32_t INC_UNLOCK = PLLINC / 32U;
const uint32_t INC_LOCK = PLLINC / 64U;
const uint32_t PLLMAX = 0x10000U;
const uint32_t PLLINC = PLLMAX / YSF_RADIO_SYMBOL_LENGTH;
const uint32_t INC = PLLINC / 32U;
const uint8_t SYNC_SYMBOL_ERRS = 2U;
const uint8_t SYNC_BIT_ERRS = 4U;
@ -312,7 +311,6 @@ static const unsigned short CCITT_TABLE[] = {
CYSFRX::CYSFRX() :
m_pll(0U),
m_prev(false),
m_inc(INC_UNLOCK),
m_state(YSFRXS_NONE),
m_bitBuffer(0x00U),
m_symbols(),
@ -337,7 +335,6 @@ void CYSFRX::reset()
{
m_pll = 0U;
m_prev = false;
m_inc = INC_UNLOCK;
m_state = YSFRXS_NONE;
m_bitBuffer = 0x00U;
m_bufferPtr = 0U;
@ -354,9 +351,9 @@ void CYSFRX::samples(const q15_t* samples, uint8_t length)
if (bit != m_prev) {
if (m_pll < (PLLMAX / 2U))
m_pll += m_inc;
m_pll += INC;
else
m_pll -= m_inc;
m_pll -= INC;
}
m_prev = bit;
@ -443,7 +440,7 @@ void CYSFRX::processNone(q15_t sample)
m_lostCount = MAX_SYNC_FRAMES;
m_bufferPtr = YSF_SYNC_LENGTH_BITS;
m_state = YSFRXS_DATA;
locked(true);
io.setDecode(true);
}
}
@ -509,7 +506,7 @@ void CYSFRX::processData(q15_t sample)
m_lostCount--;
if (m_lostCount == 0U) {
DEBUG1("YSFRX: sync timed out, lost lock");
locked(false);
io.setDecode(false);
serial.writeYSFLost();
@ -534,7 +531,7 @@ void CYSFRX::processData(q15_t sample)
if (ok && (FICH[0U] & 0xC0U) == 0x80U) {
DEBUG1("YSFRX: end of transmission");
locked(false);
io.setDecode(false);
m_state = YSFRXS_NONE;
} else {
// Start the next frame
@ -699,10 +696,3 @@ bool CYSFRX::checksum(const uint8_t* fich) const
return crc8[0U] == fich[5U] && crc8[1U] == fich[4U];
}
void CYSFRX::locked(bool lock)
{
io.setDecode(lock);
m_inc = lock ? INC_LOCK : INC_UNLOCK;
}

2
YSFRX.h
View File

@ -38,7 +38,6 @@ public:
private:
uint32_t m_pll;
bool m_prev;
uint32_t m_inc;
YSFRX_STATE m_state;
uint32_t m_symbolBuffer;
uint64_t m_bitBuffer;
@ -65,7 +64,6 @@ private:
uint32_t getSyndrome23127(uint32_t pattern) const;
uint32_t golay24128(const uint8_t* bytes) const;
bool checksum(const uint8_t* fich) const;
void locked(bool lock);
};
#endif