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[Si443x] Added missing AGC limiter

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This commit is contained in:
jgromes 2021-06-20 13:41:06 +02:00
parent a531c2ed80
commit 0b97620785
1 changed files with 7 additions and 0 deletions
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7
src/modules/Si443x/Si443x.cpp
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@ -586,10 +586,12 @@ int16_t Si443x::setFrequencyRaw(float newFreq) {
// check high/low band
uint8_t bandSelect = SI443X_BAND_SELECT_LOW;
uint8_t freqBand = (newFreq / 10) - 24;
uint8_t afcLimiter = 80;
_freq = newFreq;
if(newFreq >= 480.0) {
bandSelect = SI443X_BAND_SELECT_HIGH;
freqBand = (newFreq / 20) - 24;
afcLimiter = 40;
}
// calculate register values
@ -599,6 +601,7 @@ int16_t Si443x::setFrequencyRaw(float newFreq) {
state = _mod->SPIsetRegValue(SI443X_REG_FREQUENCY_BAND_SELECT, bandSelect | freqBand, 5, 0);
state |= _mod->SPIsetRegValue(SI443X_REG_NOM_CARRIER_FREQUENCY_1, (uint8_t)((freqCarrier & 0xFF00) >> 8));
state |= _mod->SPIsetRegValue(SI443X_REG_NOM_CARRIER_FREQUENCY_0, (uint8_t)(freqCarrier & 0xFF));
state |= _mod->SPIsetRegValue(SI443X_REG_AFC_LIMITER, afcLimiter);
return(state);
}
@ -647,6 +650,10 @@ int16_t Si443x::config() {
// disable POR and chip ready interrupts
_mod->SPIwriteRegister(SI443X_REG_INTERRUPT_ENABLE_2, 0x00);
// enable AGC
state = _mod->SPIsetRegValue(SI443X_REG_AGC_OVERRIDE_1, SI443X_AGC_GAIN_INCREASE_ON | SI443X_AGC_ON, 6, 5);
RADIOLIB_ASSERT(state);
// disable packet header
state = _mod->SPIsetRegValue(SI443X_REG_HEADER_CONTROL_2, SI443X_SYNC_WORD_TIMEOUT_ON | SI443X_HEADER_LENGTH_HEADER_NONE, 7, 4);
RADIOLIB_ASSERT(state);