CD Automation STE Series, User Manual

Page: 52 / 54

CD Automation srl STE Soft Starter User’s Manual
52
The following flow-diagram show how to organize the CRC 16 bit.
C Language CRC 16 Example
static short CRC16 (unsigned char *p_first,unsigned char *p_last)
{
unsigned int crc=0xffff;
short j;
for (;p_first<=p_last;+)
{
crc ^= *p_first;
for(j=8;j>0;j--)
{
if(crc & 0x0001)
{
crc = crc >> 1;
crc ^= 0xA001;
}
else
{
crc = crc >> 1;
}
}
}
return (crc);
}