Pololu Simple - Manual (Page 100)

CRCTable[i] = getCRCForByte(i);
}
}
unsigned char getCRC(unsigned char message[], unsigned char length)
{
unsigned char i, crc = 0;
for (i = 0; i < length; i++)
crc = CRCTable[crc ^ message[i]];
return crc;
}
int main()
{
unsigned char message[3] = {0x83, 0x01, 0x00};
int i, j;
buildCRCTable();
message[2] = getCRC(message, 2);
for (i = 0; i < sizeof(message); i++)
{
for (j = 0; j < 8; j++)
printf("%d", (message[i] >> j) % 2);
printf(" ");
}
printf("\n");
}
Pololu Simple Motor Controller User's Guide © 2001–2014 Pololu Corporation
6. Using the Serial Interface Page 100 of 101