#include "stdio.h"
//unsigned char iB[8] = {0x02,0x1C,0xB8,0x01,0x00,0x00,0x00,0xA2};
//unsigned char iB[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
unsigned char iB[8] = {0x01,0x88,0x91,0x57,0xB0,0x00,0x00,0x11};
//unsigned char iB[8] = {0x01,0x3B,0xFA,0x57,0xB0,0x00,0x00,0x9С};
unsigned char crcds = 0;
unsigned char CRC = 0;
void UpdateCRC (unsigned char b)
{
char i;
for (i = 8; i › 0; i--)
{
if ((b ^ CRC) & 1) CRC = ((CRC ^ 0x18) ›› 1) | 0x80;
else CRC ››= 1;
b ››= 1;
};
printf("ALG1 = %hhu
",CRC);
}
void Crc8(unsigned char *pcBlock,unsigned char len)
{
unsigned char crc = 0xFF;
unsigned char i;
while (len--)
{
crc ^= *pcBlock++;
for (i = 0; i ‹ 8; i++)
crc = crc & 0x80 ? (crc ‹‹ 1) ^ 0x31 : crc ‹‹ 1;
}
printf("ALG2 = %hhu
",crc);
}
void crc (char b)
{
unsigned char tmp = 0;
const char table[256] =
{0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65,
157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,
35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,
190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,
70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7,
219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,
101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,
248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,
140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205,
17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80,
175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238,
50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,
202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,
87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,
233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,
116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53};
//tmp = crc ^ b;
//printf("index: %hhu; ",tmp);
crcds = table[ (crcds ^ b) ];
printf("ALG3 = %hhu
",crcds);
}
int main()
{
char i;
for (i = 0; i ‹ 8; i++) {
UpdateCRC(iB[i]);
crc(iB[i]);
};
Crc8(iB,sizeof(iB));
return 0;
} |