|
| 1 | +/*********************************************************************************/ |
| 2 | +/* |
| 3 | + * Author : Jung Hyun Gu |
| 4 | + * File name : crc16.c |
| 5 | +*/ |
| 6 | +/*********************************************************************************/ |
| 7 | +#include "include/crc16.h" |
| 8 | +/*********************************************************************************/ |
| 9 | +/** Global variable **/ |
| 10 | + |
| 11 | + |
| 12 | +/* CRC16 Table High byte */ |
| 13 | +const unsigned char __flash CRC16Hi[] = |
| 14 | +{ |
| 15 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 16 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 17 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 18 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 19 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 20 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 21 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 22 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 23 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 24 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 25 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 26 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 27 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 28 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 29 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 30 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 31 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 32 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 33 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 34 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 35 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 36 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 37 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 38 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 39 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 40 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 41 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 42 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 43 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
| 44 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 45 | + 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
| 46 | + 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 |
| 47 | +}; |
| 48 | + |
| 49 | +/* CRC16 Table Low byte */ |
| 50 | +const unsigned char __flash CRC16Lo[] = |
| 51 | +{ |
| 52 | + 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, |
| 53 | + 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, |
| 54 | + 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, |
| 55 | + 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, |
| 56 | + 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, |
| 57 | + 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, |
| 58 | + 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, |
| 59 | + 0xD2, 0x12, 0x13, 0xD3, 0x11, 0xD1, 0xD0, 0x10, |
| 60 | + 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, |
| 61 | + 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, |
| 62 | + 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, |
| 63 | + 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, |
| 64 | + 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, |
| 65 | + 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, |
| 66 | + 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, |
| 67 | + 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, |
| 68 | + 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, |
| 69 | + 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, |
| 70 | + 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, |
| 71 | + 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, |
| 72 | + 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, |
| 73 | + 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, |
| 74 | + 0xB4, 0x74, 0x75, 0xB5, 0x77, 0xB7, 0xB6, 0x76, |
| 75 | + 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, |
| 76 | + 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, |
| 77 | + 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, |
| 78 | + 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, |
| 79 | + 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, |
| 80 | + 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, |
| 81 | + 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, |
| 82 | + 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, |
| 83 | + 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40 |
| 84 | +}; |
| 85 | +/*********************************************************************************/ |
| 86 | +int Crc16Check(char *BufCurPos, char *BufOffSet, char *BufEnd, int Length) |
| 87 | +{ |
| 88 | + unsigned char CRCHi ; |
| 89 | + unsigned char CRCLo ; |
| 90 | + unsigned int Index ; |
| 91 | + |
| 92 | + CRCHi = 0xFF ; |
| 93 | + CRCLo = 0xFF ; |
| 94 | + while(Length--) |
| 95 | + { |
| 96 | + Index = CRCHi ^ *BufCurPos++; |
| 97 | + CRCHi = CRCLo ^ CRC16Hi[Index]; |
| 98 | + CRCLo = CRC16Lo[Index]; |
| 99 | + |
| 100 | + if(BufCurPos > BufEnd) |
| 101 | + { |
| 102 | + BufCurPos = BufOffSet; |
| 103 | + } |
| 104 | + } |
| 105 | + |
| 106 | + return ((unsigned int) CRCHi << 8 | CRCLo); |
| 107 | +} |
| 108 | +/*********************************************************************************/ |
| 109 | + |
| 110 | + |
| 111 | + |
| 112 | + |
| 113 | + |
| 114 | + |
| 115 | + |
| 116 | + |
| 117 | + |
| 118 | + |
0 commit comments