2009/9/3 Bob Axtell <bob.axtell@gmail.com>:
> But these ideas have merit, though.
>
> I, too, use the PIC WDT always, and disable the interrupts
> infrequently. The only place that clears the WDT (CLRWDT) is in the
> timer interrupt, which occurs in less than 15mS intervals.
>
> But some HLLs require that the WDT not be used. How will you recover a
> locked PIC? An external WDT is the best idea. Of course, there are
> SOT23 chips that do this...
>
> --Bob
>


Bob,
Is it a good idea to refresh the wdt in a timer interrupt?
 I'm thinking that if the code locks up (program mainline) then the
timer interrupt will still be working & the wdt keeps getting
refreshed. I've tended to put wdt refreshes in the main code (= some
sort of regular loop) to avoid this.

RP
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