>My fellow Picsters... Let me make one thing perfectly clear...

>I'm confused.  I had though I'd known how to implements CRC-16.
>But, after a phone conversation dealing with LRC, of which I'd
>not heard of before, I found that I had forgotten the method
>of implementing CRC-16.

>I'm not really looking for the PIC source for this, as it
>will be used in an 8051.  If anyone post either 8051 or PIC
>source, I wouldn't complain.  I'd slap it into my source code
>library so fast that it would make my hard-drive spin.

>Mainly seeking the description of the method.

If you look up in the application note 27 from dallas
(http://www.dalsemi.com/DocControl/PDFs/app27.pdf) you will find a description
of a 8-bit CRC (a.k.a DOW-CRC) implementation on an intel processor. This
also gives a quite good description of CRC, and it should not be to difficult
to expand it to CRC-16. The polynomial for CRC-16 is X16 + X15 + X2 + 1


--
Jon Anders Haugum            jonah@sn.no            http://www.sn.no/~jonah