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Add the twist processing to the AX25 RX.

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This commit is contained in:
Jonathan Naylor
2020-06-21 21:40:40 +01:00
parent f9fcdc5292
commit e210062365
5 changed files with 373 additions and 260 deletions
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AX25Demodulator.cpp
+8 -8
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@@ -53,10 +53,9 @@ const uint32_t PLL_FILTER_LEN = 7U;
float32_t PLL_FILTER_COEFFS[] = {3.196252e-02F, 1.204223e-01F, 2.176819e-01F, 2.598666e-01F, 2.176819e-01F, 1.204223e-01F, 3.196252e-02F};
CAX25Demodulator::CAX25Demodulator(q15_t* coeffs, uint16_t length) :
CAX25Demodulator::CAX25Demodulator(int8_t n) :
m_frame(),
m_audioFilter(),
m_audioState(),
m_twist(n),
m_lpfFilter(),
m_lpfState(),
m_delayLine(NULL),
@@ -75,10 +74,6 @@ m_hdlcState(AX25_IDLE)
{
m_delayLine = new bool[DELAY_LEN];
m_audioFilter.numTaps = length;
m_audioFilter.pState = m_audioState;
m_audioFilter.pCoeffs = coeffs;
m_lpfFilter.numTaps = LPF_FILTER_LEN;
m_lpfFilter.pState = m_lpfState;
m_lpfFilter.pCoeffs = LPF_FILTER_COEFFS;
@@ -93,7 +88,7 @@ bool CAX25Demodulator::process(q15_t* samples, uint8_t length, CAX25Frame& frame
bool result = false;
q15_t fa[RX_BLOCK_SIZE];
::arm_fir_fast_q15(&m_audioFilter, samples, fa, RX_BLOCK_SIZE);
m_twist.process(samples, fa, RX_BLOCK_SIZE);
int16_t buffer[RX_BLOCK_SIZE];
for (uint8_t i = 0; i < length; i++) {
@@ -263,3 +258,8 @@ bool CAX25Demodulator::HDLC(bool b)
return false;
}
void CAX25Demodulator::setTwist(int8_t n)
{
m_twist.setTwist(n);
}