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MMDVM
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Add an adjustable transmit DC offset.

This commit is contained in:
Jonathan Naylor 2017-08-20 12:07:05 +01:00
parent f4637585f6
commit 1cee9e19c0
3 changed files with 12 additions and 5 deletions
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7
IO.cpp
View File

@ -62,6 +62,7 @@ m_dstarTXLevel(128 * 128),
m_dmrTXLevel(128 * 128), m_dmrTXLevel(128 * 128),
m_ysfTXLevel(128 * 128), m_ysfTXLevel(128 * 128),
m_p25TXLevel(128 * 128), m_p25TXLevel(128 * 128),
m_txDCOffset(DC_OFFSET),
m_ledCount(0U), m_ledCount(0U),
m_ledValue(true), m_ledValue(true),
m_detect(false), m_detect(false),
@ -299,7 +300,7 @@ void CIO::write(MMDVM_STATE mode, q15_t* samples, uint16_t length, const uint8_t
for (uint16_t i = 0U; i < length; i++) { for (uint16_t i = 0U; i < length; i++) {
q31_t res1 = samples[i] * txLevel; q31_t res1 = samples[i] * txLevel;
q15_t res2 = q15_t(__SSAT((res1 >> 15), 16)); q15_t res2 = q15_t(__SSAT((res1 >> 15), 16));
uint16_t res3 = uint16_t(res2 + DC_OFFSET); uint16_t res3 = uint16_t(res2 + m_txDCOffset);
// Detect DAC overflow // Detect DAC overflow
if (res3 > 4095U) if (res3 > 4095U)
@ -340,7 +341,7 @@ void CIO::setMode()
#endif #endif
} }
void CIO::setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rxLevel, uint8_t cwIdTXLevel, uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel) void CIO::setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rxLevel, uint8_t cwIdTXLevel, uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, int16_t txDCOffset)
{ {
m_pttInvert = pttInvert; m_pttInvert = pttInvert;
@ -351,6 +352,8 @@ void CIO::setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rx
m_ysfTXLevel = q15_t(ysfTXLevel * 128); m_ysfTXLevel = q15_t(ysfTXLevel * 128);
m_p25TXLevel = q15_t(p25TXLevel * 128); m_p25TXLevel = q15_t(p25TXLevel * 128);
m_txDCOffset = DC_OFFSET + txDCOffset;
if (rxInvert) if (rxInvert)
m_rxLevel = -m_rxLevel; m_rxLevel = -m_rxLevel;

4
IO.h
View File

@ -42,7 +42,7 @@ public:
void interrupt(); void interrupt();
void setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rxLevel, uint8_t cwIdTXLevel, uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel); void setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rxLevel, uint8_t cwIdTXLevel, uint8_t dstarTXLevel, uint8_t dmrTXLevel, uint8_t ysfTXLevel, uint8_t p25TXLevel, int16_t txDCOffset);
void getOverflow(bool& adcOverflow, bool& dacOverflow); void getOverflow(bool& adcOverflow, bool& dacOverflow);
@ -78,6 +78,8 @@ private:
q15_t m_ysfTXLevel; q15_t m_ysfTXLevel;
q15_t m_p25TXLevel; q15_t m_p25TXLevel;
uint16_t m_txDCOffset;
uint32_t m_ledCount; uint32_t m_ledCount;
bool m_ledValue; bool m_ledValue;

6
SerialPort.cpp
View File

@ -221,7 +221,7 @@ void CSerialPort::getVersion()
uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length) uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
{ {
if (length < 13U) if (length < 14U)
return 4U; return 4U;
bool rxInvert = (data[0U] & 0x01U) == 0x01U; bool rxInvert = (data[0U] & 0x01U) == 0x01U;
@ -268,6 +268,8 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
uint8_t ysfTXLevel = data[11U]; uint8_t ysfTXLevel = data[11U];
uint8_t p25TXLevel = data[12U]; uint8_t p25TXLevel = data[12U];
int16_t txDCOffset = int16_t(data[13U]) - 128;
m_modemState = modemState; m_modemState = modemState;
m_dstarEnable = dstarEnable; m_dstarEnable = dstarEnable;
@ -289,7 +291,7 @@ uint8_t CSerialPort::setConfig(const uint8_t* data, uint8_t length)
ysfTX.setLoDev(ysfLoDev); ysfTX.setLoDev(ysfLoDev);
io.setParameters(rxInvert, txInvert, pttInvert, rxLevel, cwIdTXLevel, dstarTXLevel, dmrTXLevel, ysfTXLevel, p25TXLevel); io.setParameters(rxInvert, txInvert, pttInvert, rxLevel, cwIdTXLevel, dstarTXLevel, dmrTXLevel, ysfTXLevel, p25TXLevel, txDCOffset);
io.start(); io.start();