How does the SPIRIT1 calculate CRC? I have the CRC mode set to 24 bits with the polynomial 0x864CFB. What is the initial seed value? If the length field is set at 7 bits, how is this incorporated into the CRC?

I am specifically trying to receive a packet from a SPIRIT1 transmitter on another receiver.

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ST Employee

It pads the data with a 24-bit initial word (all 1s in this case) and start the division.

CRC-24-Radix-64 is used, which initial word set to 0xffffff and bits reversion is not done.

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