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mahenth



Joined: 22 Jan 2006
Posts: 1

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crc
PostPosted: Tue Feb 07, 2006 8:34 am     Reply with quote
i'm having trouble while programing crc error checking Confused in pic 18f452 can anyone help Confused
jds-pic



Joined: 17 Sep 2003
Posts: 205

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Re: crc
PostPosted: Thu Feb 09, 2006 10:48 am     Reply with quote
mahenth wrote:
i'm having trouble while programing crc error checking Confused in pic 18f452 can anyone help Confused


no one can help you if you don't post your code (use the code button), if you don't tell us what crc algorithm you are trying to implement, if you don't post your expected results, if you don't post what results you are getting, and if you don't post the input data to your crc algorithm.

honestly, did you REALLY expect that people here could mind read your problem through some sort of advanced internet telepathy, and magically deduce that your code is missing a right shift operation on the second polynomial term in the 16 bit CCITT CRC algorithm?

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RVaughn13



Joined: 09 Feb 2006
Posts: 13
Location: Santa Fe, Texas

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CRC Question
PostPosted: Thu Feb 09, 2006 4:30 pm     Reply with quote
Hi,
I have a short code example in C for generating CRC's. Use the following link to download (in pdf format). The file name is "ES001" at the following link: http://www.eagle-systems.net/download.htm
Hope this helps!
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--Rick
ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

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PostPosted: Thu Feb 09, 2006 5:53 pm     Reply with quote
.... or search this forum for a ready made CRC implementation.

For example my own CRC16 implementation:
http://www.ccsinfo.com/forum/viewtopic.php?t=24977 Wink
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