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gamaral/calculate_crc_j1850.c

Created December 10, 2017 08:39
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CRC-8 for J1850
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calculate_crc_j1850.c
uint8_t
calculate_crc(const uint8_t *data, const size_t n)
{
const uint8_t poly = 0b00011101;
int datai, biti;
uint8_t crc = ~0;
for (datai = 0; datai < n; ++datai, ++data) {
crc ^= *data;
for (biti = 0; biti < 8; ++biti)
crc = (crc << 1) ^ (crc & 0x80 ? poly : 0);
}
return ~crc;
}
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