Crc-8 Algorithm Reference Implementation - Electronics123 UART2WF User Manual

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4.5.4. CRC-8 Algorithm Reference Implementation

INT8U __crc8_tbl[256]=
{
0x00,0x91,0xe3,0x72,0x07,0x96,0xe4,0x75,
0x0e,0x9f,0xed,0x7c,0x09,0x98,0xea,0x7b,
0x1c,0x8d,0xff,0x6e,0x1b,0x8a,0xf8,0x69,
0x12,0x83,0xf1,0x60,0x15,0x84,0xf6,0x67,
0x38,0xa9,0xdb,0x4a,0x3f,0xae,0xdc,0x4d,
0x36,0xa7,0xd5,0x44,0x31,0xa0,0xd2,0x43,
0x24,0xb5,0xc7,0x56,0x23,0xb2,0xc0,0x51,
0x2a,0xbb,0xc9,0x58,0x2d,0xbc,0xce,0x5f,
0x70,0xe1,0x93,0x02,0x77,0xe6,0x94,0x05,
0x7e,0xef,0x9d,0x0c,0x79,0xe8,0x9a,0x0b,
0x6c,0xfd,0x8f,0x1e,0x6b,0xfa,0x88,0x19,
0x62,0xf3,0x81,0x10,0x65,0xf4,0x86,0x17,
0x48,0xd9,0xab,0x3a,0x4f,0xde,0xac,0x3d,
0x46,0xd7,0xa5,0x34,0x41,0xd0,0xa2,0x33,
0x54,0xc5,0xb7,0x26,0x53,0xc2,0xb0,0x21,
0x5a,0xcb,0xb9,0x28,0x5d,0xcc,0xbe,0x2f,
0xe0,0x71,0x03,0x92,0xe7,0x76,0x04,0x95,
0xee,0x7f,0x0d,0x9c,0xe9,0x78,0x0a,0x9b,
0xfc,0x6d,0x1f,0x8e,0xfb,0x6a,0x18,0x89,
0xf2,0x63,0x11,0x80,0xf5,0x64,0x16,0x87,
0xd8,0x49,0x3b,0xaa,0xdf,0x4e,0x3c,0xad,
0xd6,0x47,0x35,0xa4,0xd1,0x40,0x32,0xa3,
0xc4,0x55,0x27,0xb6,0xc3,0x52,0x20,0xb1,
0xca,0x5b,0x29,0xb8,0xcd,0x5c,0x2e,0xbf,
0x90,0x01,0x73,0xe2,0x97,0x06,0x74,0xe5,
0x9e,0x0f,0x7d,0xec,0x99,0x08,0x7a,0xeb,
0x8c,0x1d,0x6f,0xfe,0x8b,0x1a,0x68,0xf9,
0x82,0x13,0x61,0xf0,0x85,0x14,0x66,0xf7,
0xa8,0x39,0x4b,0xda,0xaf,0x3e,0x4c,0xdd,
0xa6,0x37,0x45,0xd4,0xa1,0x30,0x42,0xd3,
0xb4,0x25,0x57,0xc6,0xb3,0x22,0x50,0xc1,
0xba,0x2b,0x59,0xc8,0xbd,0x2c,0x5e,0xcf
};
INT32S ChkCrc8(INT8U *ptr, INT32U len)
{
INT8U crc8,data;
crc8=0;
while(len--!=0)
{
data = *ptr++;
crc8=__crc8_tbl[crc8^data];
}
if(crc8==0x00)
return 0;
else
return -1;
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