Serial Communications Protocol Specifications - Swissvacuum.com

C LANGUAGE
- 15 -
The following examples show how to initialize the CRC table and how to compute the CRC bytes to be added at the
end of the packet to be sent to the controller.
#define CRC16 0xA001
static unsigned char TABLE1[256], TABLE2[256];
//Initialize tables for the calculation of the CRC
static void InitCRC()
{
unsigned char i;
unsigned int mask, crc, mem;
}
for(mask=0;mask 8); /* hibyte */
}
//Calculate the CRC
static unsigned int CalcCRC(unsigned char *buf, unsigned char size)
{
unsigned char car,i;
unsigned char crc0,crc1;
crc0 = 0xff;
crc1 = 0xff;
for(i=0;i