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https://github.com/markqvist/RNode_Firmware.git
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Optimize receiver sensitivity, per errata note 2.1
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commit
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20
LoRa.cpp
20
LoRa.cpp
@ -61,8 +61,10 @@
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#define REG_FREQ_ERROR_LSB 0x2a
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#define REG_RSSI_WIDEBAND 0x2c
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#define REG_DETECTION_OPTIMIZE 0x31
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#define REG_HIGH_BW_OPTIMIZE_1 0x36
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#define REG_DETECTION_THRESHOLD 0x37
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#define REG_SYNC_WORD 0x39
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#define REG_HIGH_BW_OPTIMIZE_2 0x3a
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#define REG_DIO_MAPPING_1 0x40
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#define REG_VERSION 0x42
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#define REG_PA_DAC 0x4d
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@ -460,6 +462,8 @@ void LoRaClass::setFrequency(long frequency) {
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writeRegister(REG_FRF_MSB, (uint8_t)(frf >> 16));
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writeRegister(REG_FRF_MID, (uint8_t)(frf >> 8));
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writeRegister(REG_FRF_LSB, (uint8_t)(frf >> 0));
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optimizeModemSensitivity();
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}
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uint32_t LoRaClass::getFrequency() {
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@ -526,6 +530,21 @@ void LoRaClass::handleLowDataRate(){
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}
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}
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void LoRaClass::optimizeModemSensitivity(){
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byte bw = (readRegister(REG_MODEM_CONFIG_1) >> 4);
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uint32_t freq = getFrequency();
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if (bw == 9 && 410E6 <= freq <= 525E6) {
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writeRegister(REG_HIGH_BW_OPTIMIZE_1, 0x02);
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writeRegister(REG_HIGH_BW_OPTIMIZE_2, 0x7f);
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} else if (bw == 9 && 862E6 <= freq <= 1020E6) {
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writeRegister(REG_HIGH_BW_OPTIMIZE_1, 0x02);
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writeRegister(REG_HIGH_BW_OPTIMIZE_2, 0x64);
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} else {
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writeRegister(REG_HIGH_BW_OPTIMIZE_1, 0x03);
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}
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}
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void LoRaClass::setSignalBandwidth(long sbw)
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{
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int bw;
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@ -555,6 +574,7 @@ void LoRaClass::setSignalBandwidth(long sbw)
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writeRegister(REG_MODEM_CONFIG_1, (readRegister(REG_MODEM_CONFIG_1) & 0x0f) | (bw << 4));
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handleLowDataRate();
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optimizeModemSensitivity();
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}
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void LoRaClass::setCodingRate4(int denominator)
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