Member Avatar for vaishnu

Hi all

I need to calculate CRC for my file..The algorithm is CRC-16..
I have a binary file with me.. I have also calculated checksum for the whole file . Now my doubt is for calculating checksum for any file do we need to calculate CRC for each and every data byte or is it just enough to do manipulations on the checksum of the whole file???


Thanks in advance

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  • Latest Post Latest Post by nick.crane
Member Avatar for nick.crane

CRC-16 is a type of checksum.
So what are you doing that needs to be checksumed twice?
[Edit]
More correctly, both are methods of detecting errors in data.
Either you do a sum check or you do a CRC.
You should not need both.

Edited by nick.crane because: n/a
Member Avatar for Momerath

To answer the last question, you need to do it on every byte of the file.

Member Avatar for vaishnu

So should we calculate CRC for separate bytes that is present in my binary file ???

Edited by vaishnu because: n/a
Member Avatar for Momerath

No, the CRC is computed on all the bytes. I uses a formula to combine them all and generate a new value.

Member Avatar for vaishnu

Can you tel me how to select a polynomial for performing CRC???

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