Source Code Example Of Calculating A Checksum - Zektor CVS4 User Manual

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Checksums and CRC-8's (Cont'd)

For comparison, here are the same examples and their associated CRC-8 checkcodes:

LI 2,3:16

LI 3,2:114

IL 2,3:22

KJ 2,3:145

Source Code Example of Calculating a Checksum

The following is a simple "C" program that calculates the checksum of the string "TestString" and

then prints the initial string with the calculated checksum appended to it.

#include "stdio.h"

int main( void)

{

char

unsigned char

int

char

cksum = 0; // initialize checksum

// Checksum all of 'TestString[]'

index = 0;

while (TestString[index] != '\0')

cksum += TestString[index++];

// Add the checksum token character ';' to checksum

cksum += token;

// Print the results

printf( "%s%c%u", TestString, token, (unsigned char)cksum);

return (0);

}

TestString[] = "LI 2,3";

cksum;

index;

token = ';';

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