Re: [avr-gcc-list] Looking for a spurious interrupt

[Trevor White]

When you say you have a spurious interrupt. I take it you have all the 
interrupts enabled for everything? Are you able to turn everything off 
and then start turning interrupts on one by one...

Another thought is could you use a register to identify what routine you 
were running when the interrupt occurs. For example

IDInterruptRegister = 0

int main(void)
{
   IDInterruptRegister = 1;
   Somefunction();
   IDInterruptRegister = 2;
   ..more code...
   ...
   ...
   IDInterruptRegister = 3;
}

Maybe this would enable you to gain focus on the part of the software 
where the interrupt is happening. Might not help with some interrupts 
but thought it might trigger something.

Trev


Bernard Fouché wrote:

> Hi René.
>
> I've thought of that, but it will generate one handler per signal and at the
> moment I'm very tight in memory and, if possible, I would prefer to read a
> particular register, if ever such a register presenting this information
> exist. Otherwise I'll do something like you describe.
>
> -----Message d'origine-----
> De : René Liebscher [mailto:address@hidden
> Envoyé : vendredi 3 septembre 2004 12:04
> À : Bernard Fouché
> Cc : address@hidden
> Objet : Re: [avr-gcc-list] Looking for a spurious interrupt
>
>
> Bernard Fouché wrote:
>  
>
> > Hi.
> >
> > Using SIGNAL(__vector_default), I'm tracking a problematic unexpected
> > interrupt. How can I know what interrupt called SIGNAL(__vector_default)
> > from the body of the function that I define?
> >
> > For instance:
> >
> > SIGNAL(__vector_default)
> > {
> >         .. code to known what vector was activated ...
> >         .. code to store this information somewhere ...
> > }
> >
> > Thanks!
> >
> >  Bernard
> >    
>
> I have no idea how to get the information which interrupt was called.
> But you could create handlers for every possible interrupt.
> Probably you want to use a script for the task.
>
> For the Mega32 this could be done like the following.
> (should be all in one  line)
>
> cat /usr/avr/include/avr/iom32.h
> | grep "#define SIG_"
> | awk 'BEGIN{print "#include <avr/signal.h>";
>              print "#define NUMBER_OF_VECTOR(x) x" };
>       { printf("SIGNAL(%s){ save=NUMBER_OF%s; };\n",$2,$3); }'
>
> Then you only have to delete the interrupts you use already in your
> program. (and change the "save=" statement to what ever you like.)
>
> Kind regards
> Rene
>
>
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