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[SX127x] Added -1 as alias for lowest supported frequency deviation

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This commit is contained in:
jgromes 2021-02-13 17:41:53 +01:00
parent f3c1887517
commit ed4d6e8897
1 changed files with 8 additions and 2 deletions
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10
src/modules/SX127x/SX127x.cpp
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@ -708,8 +708,14 @@ int16_t SX127x::setFrequencyDeviation(float freqDev) {
return(ERR_WRONG_MODEM);
}
// set frequency deviation to lowest available setting (required for digimodes)
float newFreqDev = freqDev;
if(freqDev < 0.0) {
newFreqDev = 0.6;
}
// check frequency deviation range
if(!((freqDev + _br/2.0 <= 250.0) && (freqDev <= 200.0))) {
if(!((newFreqDev + _br/2.0 <= 250.0) && (freqDev <= 200.0))) {
return(ERR_INVALID_FREQUENCY_DEVIATION);
}
@ -719,7 +725,7 @@ int16_t SX127x::setFrequencyDeviation(float freqDev) {
// set allowed frequency deviation
uint32_t base = 1;
uint32_t FDEV = (freqDev * (base << 19)) / 32000;
uint32_t FDEV = (newFreqDev * (base << 19)) / 32000;
state = _mod->SPIsetRegValue(SX127X_REG_FDEV_MSB, (FDEV & 0xFF00) >> 8, 5, 0);
state |= _mod->SPIsetRegValue(SX127X_REG_FDEV_LSB, FDEV & 0x00FF, 7, 0);
return(state);