Hey Josh,

I have looked at his include file, and the descriptions are good, he's
> just pulling stuff like:
>
>                         goto            _repeat#v(_rptstack#v(_rptstackptr))


Well I know the #v means concatenation to the MPASM preprocess (actually...
I am not so sure anymore...). So I think all that does is jump to a label
you generated before. The _rptstack and _rptstackptr  I am not so sure
about. But I can guess that one number is to differentiate it from other
loops. And the other maybe implement a sort of fake label stack (if that
makes any sense at all) so that you can nest these macro loops? This is
actually a very interesting way to implement this, however it makes
debugging very difficult indeed.


which I don't really get. Also they're annoying when debugging as
> invariably the infinite loop I'm getting caught in is in one of the
> macros. I haven't figured out yet what to set a watch on so I can
> figure out where the macro was called from.


I am not sure I understand what do you mean by where the macro is calling
from. Isn't it in the main loop the repeat-until macro. If you want, you may
want to insert a random nop into the loop and set a breakpoint on it using
ICD 2. However, this basically renders the USB connection useless b/c it
would time out.


I'm also seriously considering expanding all of his macros in the main
> code. It will make debugging easier, and having to go through the code
> in that detail should force me to learn more about it.


Why not just look at the list files? It is probably going to be the same,
and will save you a ton of work. Although doing it your way may save you a
lot of headache trying to understand all those weird labels.


After an afternoon of trying to figure out why the heck my
> breadboarded circuit wasn't working, I discovered something about his
> code. For whatever reason, it doesn't seem to work with Win2K at all.
> It does work with WindowsXP though, which I found out after trying
> another computer in desperation. Something to note though if you're
> planning on playing with it.


Really? Before I stopped playing with it, I managed to get his lab1 and lab2
working for both XP and 2000. But I am not using the same usb chip though (I
am using the 18F2550) and I did screw around with the oscillator settings
and what not.

Well, back to study it some more!


Well best of luck... hmm this is so interesting now, I probably will start
working on it after finals which would be around wednesday. Maybe someone
with more experience with the PIC USB chips will be willing to help you out.

- Terry
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