AVR-Chat

Sorry, forgot all about it. I'll check in the morning at work.

Jim
On May 9, 2010, at 9:58 PM, Philippe Habib wrote:

> Jim,
>
> Did you happen to get a chance to look at this? I got pulled off to
> something else for a few days but I'll be getting back to it soon.
>
> Thanks.
>
> On May 4, 2010, at 9:12 PM, wagnerj@proaxis.com wrote:
>
> >> I'm using the IAR compiler V5.11 or 5.12 and need to use the  
> feature
> >> that has the linker write a CRC in the last two bytes of the
> >> executable.
> >>
> >> I got the linker to write the CRC and I am able to read it back.  
> The
> >> problem is, I can't manage to compute the same one. I have tried
> >> several different routines to generate the CRC and they agree with
> >> each other, but not with what IAR computes. In each case, it is
> >> supposed to be a CRC 16 of the CCITT variety with 0x1021 as the
> >> polynomial.
> >>
> >> Has anyone gotten this to work? Is there some sample code somewhere
> >> that has been shown to work with the IAR computed CRC?
> >>
> >> Thanks.
> >>
> >
> > Phillip -
> >
> > There are a number of "standard" initial conditions for the
> > polynomial, I
> > think. Each one gives a different result. I am using IAR, against my
> > better instincts, but its at work and I am 300 miles from there. I
> > will be
> > happy to check when I return on Thursday.
> >
> > Jim Wagner
> > Oregon Research Electronics
> >
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>
>
> 



[Non-text portions of this message have been removed]