SNR calculation error #18
Description
Version
main
Describe the bug
When I was using the LLCC68 module, the distance between the master and slave modules was quite far. During the calculation of the SNR value, abnormal values appeared. The current value should be a negative number (close to -20), but the calculated SNR value is a positive number (45 to 48).
Reproduce
When the signals between the modules are poor, calculate the SNR value.
Expected behavior
When the signal is very poor, the calculated value of SNR should be a negative number.
Additional context
After reading the LLCC68 data manual, I suspect that there is an error in the calculation performed by the GetPacketStatus register with the value of 0x14 when reading the data. The original text of the manual reads: "Estimate the SNR of the last received packet in two's complement format and multiply it by 4. The actual SNR in dB = SnrPkt / 4." The SNR calculation value here still uses uint8_t, but in reality, int8_t should be used instead.