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Issue with float in ISR on ESP32 #460

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Issue with float in ISR on ESP32 #460

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9 changes: 9 additions & 0 deletions src/LoRa.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -266,7 +266,11 @@ int LoRaClass::packetRssi()
return (readRegister(REG_PKT_RSSI_VALUE) - (_frequency < RF_MID_BAND_THRESHOLD ? RSSI_OFFSET_LF_PORT : RSSI_OFFSET_HF_PORT));
}

#if !defined(ESP32)
float LoRaClass::packetSnr()
#else
double LoRaClass::packetSnr()
#endif
{
return ((int8_t)readRegister(REG_PKT_SNR_VALUE)) * 0.25;
}
Expand All @@ -284,8 +288,13 @@ long LoRaClass::packetFrequencyError()
freqError -= 524288; // B1000'0000'0000'0000'0000
}

#if !defined(ESP32)
const float fXtal = 32E6; // FXOSC: crystal oscillator (XTAL) frequency (2.5. Chip Specification, p. 14)
const float fError = ((static_cast<float>(freqError) * (1L << 24)) / fXtal) * (getSignalBandwidth() / 500000.0f); // p. 37
#else
const double fXtal = 32E6; // FXOSC: crystal oscillator (XTAL) frequency (2.5. Chip Specification, p. 14)
const double fError = ((static_cast<double>(freqError) * (1L << 24)) / fXtal) * (getSignalBandwidth() / 500000.0); // p. 37
#endif

return static_cast<long>(fError);
}
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4 changes: 4 additions & 0 deletions src/LoRa.h
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,11 @@ class LoRaClass : public Stream {

int parsePacket(int size = 0);
int packetRssi();
#if !defined(ESP32)
float packetSnr();
#else
double packetSnr();
#endif
long packetFrequencyError();

int rssi();
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