Appendix A - Crc-16 Calculation - Honeywell UMC800 Reference Manual

Appendix B
CRC-16 Calculation
See following function:
extern void calculate_CRC(unsigned char *message, int length, unsigned char *CRC)
{
unsigned char CRCHi, CRCLo, TempHi, TempLo;
static const unsigned char table[512] = {
0x00, 0x00, 0xC0, 0xC1, 0xC1, 0x81,
0xC6, 0x01, 0x06, 0xC0, 0x07,
0xCC, 0x01, 0x0C, 0xC0, 0x0D, 0x80,
0x0A, 0x00, 0xCA, 0xC1, 0xCB, 0x81,
0xD8, 0x01, 0x18, 0xC0, 0x19,
0x1E, 0x00, 0xDE, 0xC1, 0xDF, 0x81,
0x14, 0x00, 0xD4, 0xC1, 0xD5, 0x81,
0xD2, 0x01, 0x12, 0xC0, 0x13,
0xF0, 0x01, 0x30, 0xC0, 0x31,
0x36, 0x00, 0xF6, 0xC1, 0xF7,
0x3C, 0x00, 0xFC, 0xC1, 0xFD, 0x81,
0xFA, 0x01, 0x3A, 0xC0, 0x3B, 0x80,
0x28, 0x00, 0xE8, 0xC1, 0xE9, 0x81,
0xEE, 0x01, 0x2E, 0xC0, 0x2F,
0xE4, 0x01, 0x24, 0xC0, 0x25,
0x22, 0x00, 0xE2, 0xC1, 0xE3, 0x81,
0xA0, 0x01, 0x60, 0xC0, 0x61,
0x66, 0x00, 0xA6, 0xC1, 0xA7, 0x81,
0x6C, 0x00, 0xAC, 0xC1, 0xAD, 0x81,
0xAA, 0x01, 0x6A, 0xC0, 0x6B, 0x80,
0x78, 0x00, 0xB8, 0xC1, 0xB9, 0x81,
0xBE, 0x01, 0x7E, 0xC0, 0x7F,
0xB4, 0x01, 0x74, 0xC0, 0x75,
0x72, 0x00, 0xB2, 0xC1, 0xB3, 0x81,
0x50, 0x00, 0x90, 0xC1, 0x91,
0x96, 0x01, 0x56, 0xC0, 0x57,
0x9C, 0x01, 0x5C, 0xC0, 0x5D, 0x80,
0x5A, 0x00, 0x9A, 0xC1, 0x9B, 0x81,
0x88, 0x01, 0x48, 0xC0, 0x49,
0x4E, 0x00, 0x8E, 0xC1, 0x8F,
0x44, 0x00, 0x84, 0xC1, 0x85,
0x82, 0x01, 0x42, 0xC0, 0x43,
};
CRCHi = 0xff;
CRCLo = 0xff;
while(length)
{
TempHi = CRCHi;
TempLo = CRCLo;
CRCHi = table[2 * (*message ^ TempLo)];
CRCLo = TempHi ^ table[(2 * (*message ^ TempLo)) + 1];
message++;
length--;
};
CRC [0] = CRCLo;
CRC [1] = CRCHi;
return;
}
136

Appendix A - CRC-16 Calculation

0x01, 0x40,
0x80, 0xC7, 0x41,
0xCD, 0x41,
0x0B, 0x40,
0x80, 0xD9, 0x41,
0x1F, 0x40,
0x15, 0x40,
0x80, 0xD3, 0x41,
0x80, 0xF1, 0x41,
0x81, 0x37, 0x40,
0x3D, 0x40,
0xFB, 0x41,
0x29, 0x40,
0x80, 0xEF, 0x41,
0x80, 0xE5, 0x41,
0x23, 0x40,
0x80, 0xA1, 0x41,
0x67, 0x40,
0x6D, 0x40,
0xAB, 0x41,
0x79, 0x40,
0x80, 0xBF, 0x41,
0x80, 0xB5, 0x41,
0x73, 0x40,
0x81, 0x51, 0x40,
0x80, 0x97, 0x41,
0x9D, 0x41,
0x5B, 0x40,
0x80, 0x89, 0x41,
0x81, 0x4F, 0x40,
0x81, 0x45, 0x40,
0x80, 0x83, 0x41,
RS232 Communications Reference Manual
0xC3, 0x01, 0x03, 0xC0, 0x02,
0x05, 0x00, 0xC5, 0xC1, 0xC4, 0x81,
0x0F, 0x00, 0xCF, 0xC1, 0xCE, 0x81,
0xC9, 0x01, 0x09, 0xC0, 0x08,
0x1B, 0x00, 0xDB, 0xC1, 0xDA, 0x81,
0xDD, 0x01, 0x1D, 0xC0, 0x1C, 0x80,
0xD7, 0x01, 0x17, 0xC0, 0x16,
0x11, 0x00, 0xD1, 0xC1, 0xD0, 0x81,
0x33, 0x00, 0xF3, 0xC1, 0xF2,
0xF5, 0x01, 0x35, 0xC0, 0x34,
0xFF, 0x01, 0x3F, 0xC0, 0x3E, 0x80,
0x39, 0x00, 0xF9, 0xC1, 0xF8,
0xEB, 0x01, 0x2B, 0xC0, 0x2A, 0x80,
0x2D, 0x00, 0xED, 0xC1, 0xEC, 0x81,
0x27, 0x00, 0xE7, 0xC1, 0xE6, 0x81,
0xE1, 0x01, 0x21, 0xC0, 0x20,
0x63, 0x00, 0xA3, 0xC1, 0xA2, 0x81,
0xA5, 0x01, 0x65, 0xC0, 0x64,
0xAF, 0x01, 0x6F, 0xC0, 0x6E, 0x80,
0x69, 0x00, 0xA9, 0xC1, 0xA8, 0x81,
0xBB, 0x01, 0x7B, 0xC0, 0x7A, 0x80,
0x7D, 0x00, 0xBD, 0xC1, 0xBC, 0x81,
0x77, 0x00, 0xB7, 0xC1, 0xB6, 0x81,
0xB1, 0x01, 0x71, 0xC0, 0x70,
0x93, 0x01, 0x53, 0xC0, 0x52,
0x55, 0x00, 0x95, 0xC1, 0x94,
0x5F, 0x00, 0x9F, 0xC1, 0x9E, 0x81,
0x99, 0x01, 0x59, 0xC0, 0x58,
0x4B, 0x00, 0x8B, 0xC1, 0x8A, 0x81,
0x8D, 0x01, 0x4D, 0xC0, 0x4C, 0x80,
0x87, 0x01, 0x47, 0xC0, 0x46,
0x41, 0x00, 0x81, 0xC1, 0x80,
0x80, 0xC2, 0x41,
0x04, 0x40,
0x0E, 0x40,
0x80, 0xC8, 0x41,
0x1A, 0x40,
0xDC, 0x41,
0x80, 0xD6, 0x41,
0x10, 0x40,
0x81, 0x32, 0x40,
0x80, 0xF4, 0x41,
0xFE, 0x41,
0x81, 0x38, 0x40,
0xEA, 0x41,
0x2C, 0x40,
0x26, 0x40,
0x80, 0xE0, 0x41,
0x62, 0x40,
0x80, 0xA4, 0x41,
0xAE, 0x41,
0x68, 0x40,
0xBA, 0x41,
0x7C, 0x40,
0x76, 0x40,
0x80, 0xB0, 0x41,
0x80, 0x92, 0x41,
0x81, 0x54, 0x40,
0x5E, 0x40,
0x80, 0x98, 0x41,
0x4A, 0x40,
0x8C, 0x41,
0x80, 0x86, 0x41,
0x81, 0x40, 0x40,
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