g4klx/MMDVM
1
0
Fork 0
mirror of https://github.com/g4klx/MMDVM.git synced 2026-04-05 22:46:59 +00:00
Code Issues Projects Releases Packages Wiki Activity

Add an experimental noise squelch.

Browse source
This commit is contained in:
Jonathan Naylor 2020-07-28 13:55:50 +01:00
parent 6964251122
commit d8f138066e
5 changed files with 189 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

17
FM.cpp
View file

@ -39,6 +39,7 @@ m_rfAck(),
m_extAck(),
m_ctcssRX(),
m_ctcssTX(),
m_squelch(),
m_timeoutTone(),
m_state(FS_LISTENING),
m_callsignAtStart(false),
@ -60,6 +61,7 @@ m_filterStage3(32768, -65536, 32768, 32768, -64075, 31460),
m_blanking(),
m_accessMode(1U),
m_cosInvert(false),
m_noiseSquelch(false),
m_rfAudioBoost(1U),
m_extAudioBoost(1U),
m_downSampler(400U),// 100 ms of audio
@ -87,6 +89,11 @@ void CFM::samples(bool cos, q15_t* samples, uint8_t length)
// ARMv7-M has hardware integer division
q15_t currentRFSample = q15_t((q31_t(samples[i]) << 8) / m_rxLevel);
if (m_noiseSquelch) {
uint8_t squelchState = m_squelch.process(currentRFSample);
cos = NSQ_VALID(squelchState);
}
q15_t currentExtSample;
bool inputExt = m_inputExtRB.getSample(currentExtSample);//always consume the external input data so it does not overflow
inputExt = inputExt && m_extEnabled;
@ -281,6 +288,7 @@ void CFM::reset()
m_inputExtRB.reset();
m_downSampler.reset();
m_squelch.reset();
m_needReverse = false;
}
@ -313,10 +321,11 @@ uint8_t CFM::setAck(const char* rfAck, uint8_t speed, uint16_t frequency, uint8_
return m_rfAck.setParams(rfAck, speed, frequency, level, level);
}
uint8_t CFM::setMisc(uint16_t timeout, uint8_t timeoutLevel, uint8_t ctcssFrequency, uint8_t ctcssHighThreshold, uint8_t ctcssLowThreshold, uint8_t ctcssLevel, uint8_t kerchunkTime, uint8_t hangTime, uint8_t accessMode, bool cosInvert, uint8_t rfAudioBoost, uint8_t maxDev, uint8_t rxLevel)
uint8_t CFM::setMisc(uint16_t timeout, uint8_t timeoutLevel, uint8_t ctcssFrequency, uint8_t ctcssHighThreshold, uint8_t ctcssLowThreshold, uint8_t ctcssLevel, uint8_t kerchunkTime, uint8_t hangTime, uint8_t accessMode, bool cosInvert, bool noiseSquelch, uint8_t squelchHighThreshold, uint8_t squelchLowThreshold, uint8_t rfAudioBoost, uint8_t maxDev, uint8_t rxLevel)
{
m_accessMode = accessMode;
m_cosInvert = cosInvert;
m_accessMode = accessMode;
m_cosInvert = cosInvert;
m_noiseSquelch = noiseSquelch;
m_rfAudioBoost = q15_t(rfAudioBoost);
@ -331,6 +340,8 @@ uint8_t CFM::setMisc(uint16_t timeout, uint8_t timeoutLevel, uint8_t ctcssFreque
m_rxLevel = rxLevel; //q15_t(255)/q15_t(rxLevel >> 1);
m_squelch.setParams(squelchHighThreshold, squelchLowThreshold);
uint8_t ret = m_ctcssRX.setParams(ctcssFrequency, ctcssHighThreshold, ctcssLowThreshold);
if (ret != 0U)
return ret;