On Tuesday 18 March 2003 06:59 pm, Jai Dhar wrote:
> my problem (finally) is that the
> time between the first half interrupt and second half interrupt
> aren't even.. they vary by one instruction cycle... and this is
> because of the check for the flag. If I remove that check, it
> interrupts every 500mS as it should (I am checking all this with
> the stopwatch in MPSIM Btw)

I seem to recall someone complaining about the same thing with MPSIM
and hearing from Microchip that there was a timing bug.

The timer itself will generate periodic interrupts reliably, though
latency may vary depending on what's being done at the time (i.e.
whether you're inside a 2-cycle instruction or not when the interrupt
fires).

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Ned Konz
http://bike-nomad.com
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