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add cardx crc skeleton, will need to adapt

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iceman1001 2019-12-16 13:26:13 +01:00
commit 50d1dfea77
2 changed files with 10 additions and 0 deletions
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8
common/crc.c
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@ -126,3 +126,11 @@ uint32_t CRC8Legic(uint8_t *buff, size_t size) {
crc_update2(&crc, buff[i], 8);
return reflect8(crc_finish(&crc));
}
// width=8 poly=0x107, init=0x2C refin=true refout=true xorout=0x0000 check=0 name="CRC-8/CARDX"
uint32_t CRC8Cardx(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 8, 0x107, 0x2C, 0, true, true);
for (size_t i = 0; i < size; ++i)
crc_update2(&crc, buff[i], 8);
return crc_finish(&crc);
}

2
common/crc.h
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@ -73,4 +73,6 @@ uint32_t CRC4Legic(uint8_t *buff, size_t size);
// Calculate CRC-8/Legic checksum
uint32_t CRC8Legic(uint8_t *buff, size_t size);
// Calculate CRC-8/Cardx checksum
uint32_t CRC8Cardx(uint8_t *buff, size_t size);
#endif /* __CRC_H */