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Re: Замок на iButton DS1990
добрый день!
Япользуюсь вообще таблицей CRC , просто удобно
//
const unsigned char table[] = {
0,94,188,226,97,63,221,131,194,156,126,32,163,253, 31,65,
157,195,33,127,252,162,64,30,95,1,227,189,62,96,13 0,220,
35,125,159,193,66,28,254,160,225,191,93,3,128,222, 60,98,
190,224,2,92,223,129,99,61,124,34,192,158,29,67,16 1,255,
70,24,250,164,39,121,155,197,132,218,56,102,229,18 7,89,7,
219,133,103,57,186,228,6,88,25,71,165,251,120,38,1 96,154,
101,59,217,135,4,90,184,230,167,249,27,69,198,152, 122,36,
248,166,68,26,153,199,37,123,58,100,134,216,91,5,2 31,185,
140,210,48,110,237,179,81,15,78,16,242,172,47,113, 147,205,
17,79,173,243,112,46,204,146,211,141,111,49,178,23 6,14,80,
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,
202,148,118,40,171,245,23,73,8,86,180,234,105,55,2 13,139,
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 };
char CRC_8(char *p)
{
unsigned char a;
unsigned char CRC = 0;
for (a = 7; a › 0; a--)
{
CRC = table[CRC ^ *(p + a)];
}
if (CRC == *p){return CRC = 1;}
else {return CRC = 0;}
}
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