Микроконтроллеры

unsigned char crc8(const void* buf, unsigned char num)

{

	unsigned char i;

	unsigned char chr, crc = 0;

	char* tmp = (char*)buf;



	while(num--)

	{

		chr = *tmp++;



		for(i = 0; i < 8; i++)

		{

			crc = ((chr ^ crc) & 1) ? ((crc ^ 0x18) >> 1) | 0x80 : (crc >> 1) & ~0x80;

			chr >>= 1;

		}

	}



	return crc;

}