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Add optional TX DC offset.

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This commit is contained in:
Jonathan Naylor 2017-08-20 12:23:51 +01:00
parent 76312c7bb9
commit 14ce682210
3 changed files with 12 additions and 5 deletions
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7
IO.cpp
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@ -48,6 +48,7 @@ m_dstarTXLevel(128 * 128),
m_dmrTXLevel(128 * 128),
m_ysfTXLevel(128 * 128),
m_p25TXLevel(128 * 128),
m_txDCOffset(DC_OFFSET),
m_ledCount(0U),
m_ledValue(true),
m_detect(false),
@ -246,7 +247,7 @@ void CIO::write(MMDVM_STATE mode, q15_t* samples, uint16_t length, const uint8_t
for (uint16_t i = 0U; i < length; i++) {
q31_t res1 = samples[i] * txLevel;
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
if (res3 > 4095U)
@ -287,7 +288,7 @@ void CIO::setMode()
#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;
@ -297,6 +298,8 @@ void CIO::setParameters(bool rxInvert, bool txInvert, bool pttInvert, uint8_t rx
m_dmrTXLevel = q15_t(dmrTXLevel * 128);
m_ysfTXLevel = q15_t(ysfTXLevel * 128);
m_p25TXLevel = q15_t(p25TXLevel * 128);
m_txDCOffset = DC_OFFSET + txDCOffset;
if (rxInvert)
m_rxLevel = -m_rxLevel;