James,

Please don't beat yourself up. A friend of mine and I once spent
several WEEKS trying to figure out why a processor with external
memory wasn't booting, only to find out eventually that we had an
endian problem (We referred to the two flash chips as HIGH and LOW,
and by that he meant high/low significance and I meant high/low
address. Since it was a motorola mc68302, these were not the same!).
Simply swapping the ICs caused it to boot right away.

Sean


On 4/5/07, James Newton, Host <jamesnewton@piclist.com> wrote:
>
> I'm going to do what is good for the soul here and admit what the actual
> problem turned out to be. The spec calls for 4 bytes of argument to be sent
> between the command and the CRC. I was sending 3 bytes.
>
> I'm not sure how many times I checked the analyzer display against the spec,
> but it must have been 50 or more times. Didn't see that (obvious) difference
> every single time. Another guy looked at it and said "hey, doesn't that say
> 4 bytes? This looks like 3 to me..."
>
> Whereupon I said "No fxxking WAY!", changed the code, ran it and completely
> freaked out when the card responded.
>
> I'm not charging the client for about 2 days of otherwise billable time.
> Some times I think it's a good thing I have a day job. Sigh. If it wasn't
> for the fact that in the past I've pulled many a project out of the toilet
> and saved more than a few other peoples bacon from the fire, I would quit
> doing this sort of work.
>
> Another point is that I have got to get a new unit that can export images of
> the signals so that I can post them for other people to look at.
>
> ---
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