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Accurate preamble and airtime calculations on SX1280. Fix airtime calculation on SX1262 when LDRO is enabled.

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This commit is contained in:
Mark Qvist 2025-01-05 22:55:32 +01:00
parent b667e825f8
commit c39164e272
8 changed files with 99 additions and 57 deletions
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6
sx127x.cpp
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@ -440,19 +440,23 @@ void sx127x::setCodingRate4(int denominator) {
writeRegister(REG_MODEM_CONFIG_1_7X, (readRegister(REG_MODEM_CONFIG_1_7X) & 0xf1) | (cr << 1));
}
void sx127x::setPreambleLength(long length) {
void sx127x::setPreambleLength(long preamble_symbols) {
long length = preamble_symbols - 4;
writeRegister(REG_PREAMBLE_MSB_7X, (uint8_t)(length >> 8));
writeRegister(REG_PREAMBLE_LSB_7X, (uint8_t)(length >> 0));
}
extern bool lora_low_datarate;
void sx127x::handleLowDataRate() {
int sf = (readRegister(REG_MODEM_CONFIG_2_7X) >> 4);
if ( long( (1<<sf) / (getSignalBandwidth()/1000)) > 16) {
// Set auto AGC and LowDataRateOptimize
writeRegister(REG_MODEM_CONFIG_3_7X, (1<<3)|(1<<2));
lora_low_datarate = true;
} else {
// Only set auto AGC
writeRegister(REG_MODEM_CONFIG_3_7X, (1<<2));
lora_low_datarate = false;
}
}