> Please, is there here some good soul that understand this
> functions hi8 and lo8 (from GCC AVR) and can help me to port it to
> Python?
>
> uint16_t
> crc_ccitt_update (uint16_t crc, uint8_t data)
> {
> data ˆ= lo8 (crc);
> data ˆ= data << 4;
> return ((((uint16_t)data << 8) | hi8 (crc)) ˆ (uint8_t)(data >> 4)
> ˆ ((uint16_t)data << 3));
> }
Most likely, lo8(crc) == crc & 0xFF, and hi8(crc) == (crc >> 8) & 0xFF
(the last bit masking might be redundant, as crc should not occupy more
than 16 bits, anyway).
HTH,
Martin
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