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A problem with crc-32 check

 
 
grimreaper
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      05-08-2006
I`m doing a project in VHDL concerning ethernet, and I have a problem with
CRC-32 (polynomial x"04C11DB7").
CRC is initialized into x"ffffffff", after sending all the bytes of the
frame 4 bytes with zeros are sent to CRC generetor to calculate CRC. Is that
the value of CRC I have to send to the next layer (phy -> ethernet) after
sending the frame?
I tried everything, but CRC is never x"00000000"...

Here`s the crc-32 generator I`m using:
http://www.itee.uq.edu.au/~peters/xs...tack/stack.htm


 
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Mike Treseler
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      05-08-2006
grimreaper wrote:

> I tried everything, but CRC is never x"00000000"...


It isn't supposed to be zero.
You are confusing the transmitted FCS
and the remainder "checksum" calculated
by the receiver.

http://groups.google.com/groups/sear...nder+c704_dd7b

-- Mike Treseler
 
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grimreaper
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      05-08-2006

"Mike Treseler" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> grimreaper wrote:
>
> > I tried everything, but CRC is never x"00000000"...

>
> It isn't supposed to be zero.
>


It is. I got it...


 
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