checksum

[pr83]

I have an array of 12 data bytes. I wrote code for checksum, where the check sum is the one's compliment of the sum of the 12 data bytes. I have pasted the code below. Do you see any mistakes, cause I dont seem to be getting the correct checksum.

[Ttlmah]

Think about what you are doing.
First time through the loop. temp, becomes the sum of entry 0, and entry 1. Second time through the loop, this value is thrown away, and temp becomes the sum of entry 2, and entry 3....
The last time through the loop, temp becomes the sum of entry 10 and entry 11. Not the sum of the whole lot...
To add up the values, you need:

[pr83]

Thanks Ttlmah.
You are correct.