AVR-Chat

might be!

Jim Wagner
On Jun 13, 2010, at 9:04 PM, stevec wrote:

>
> could it be a byte order problem in the computed CRC or the  
> polynomial?
>
> --- In AVR-Chat@yahoogroups.com, Dede <dewa27@...> wrote:
> >
> >
> > J
> >
> >
> > ----- Original Message -----
> > From: wagnerj@...
> > Sent: 05 May 2010 11:13
> > To: AVR-Chat@yahoogroups.com
> > Subject: Re: [AVR-Chat] CRC using IAR compiler
> >
> >
> > > 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.
> > >
> >
> > PS - sorry for misspelling your name!
> >
> > Jim Wagner
> >
> >
> > Reply to sender | Reply to group |
> >
> > [The entire original message is not included]
> >
> > [Non-text portions of this message have been removed]
> >
>
>
> 



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