What sort of PIC are you using? I've been playing with an '877, where
timer1 has a built in oscillator. I used a 32768 Hz watch xtal, and get
timer overflow every 2 seconds. By preloading the timer, you can get other
values, or by polling the counter you can measure time in 1/32768 ths of a
second.

larry

At 03:41 PM 11/26/2002 +0200, you wrote:
> > You appear to have the dread "quoted printable" set
>
>What does it mean? I'll look into it...
>
> > Sherlock Holmes tells us that therefore the code is wrong!
> > (probably :-) )
>
>Code is wrong! ;-)
>
> > Most probable cause is that you haven't allowed for the time
> > spent in the ISR when reloading the counter.
>
>No, that's not it. I chose TMR2 where there is no need to reload any
>counters. Compare value PR2 is loaded only once when initializing
>interrupts.
>
>But datasheet says: "Timer2 increments from 00h until it matches PR2 and
>then resets to 00h on the next increment cycle."
>
>So, instead of PR2 value 250 I should use 249.
>
>Am I right?
>
>Tauno
>
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Larry Bradley
Orleans (Ottawa), Ontario, CANADA

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