AVR-Chat

On Wed, May 5, 2010 at 12:53 AM, Philippe Habib <phabib@well.com> wrote:

>
>
> I am using 0 as the initial value.
>

That will miss inserted leading zeros.  Using 0xFFFF will not have that
problem.

Also if you store the ones compliment of the CRC, low byte first, at the end
of your data, when you CRC that as part of your data you will end up with a
"Magic Number", that will always be the same if the CRC is good.  0xF0B8 is
common for 0x1021 polynomial.  It could also be 0x1D0F in reverse bit order.
 Take a look at the CRC section in http://www.boost.org for a good write up
on CRCs.


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