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FIX: @marshmellow found out that the CRC-8/Maxim was not always giving the right checksum. Change POLY from 0x31 -> 0x8C

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iceman1001
2015-03-12 20:33:36 +01:00
parent 118bfa1b1f
commit a8cd503dd5
2 changed files with 5 additions and 7 deletions
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10
common/crc.c
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@@ -42,14 +42,12 @@ uint32_t crc_finish(crc_t *crc)
return ( crc->state ^ crc->final_xor ) & crc->mask;
}
int CRC8Maxim(uint8_t *buff, size_t size ) {
uint32_t CRC8Maxim(uint8_t *buff, size_t size) {
crc_t crc;
crc_init(&crc, 8, 0x31, 0x00, 0x00);
crc_clear(&crc);
for ( int i=0; i < size; ++i){
crc_init(&crc, 9, 0x8c, 0x00, 0x00);
for ( uint8_t i = 0; i < size; ++i){
crc_update(&crc, buff[i], 8);
}
return crc_finish(&crc);
}
}