On Thu, 25 Mar 2004, Edward Cooper wrote:

> Now I'm not entirely clear if another interrupt can occur while one is
> in process?  I'm thinking it can't because it would just mess up the
> PUSH and POP process, or would it!?

Normally, global interrupts are disabled in your ISR, so if an
interrupt event occurs, it will not cause the ISR to be re-entered.
Interrupt flags will continue to be set for events that occur while
you're in the interrupt.

> Basically the TMR0 process is very short, I just need it to occur while
> the processor is still dealing with the serial receive.
>
> I think I should really look into handling this serial receive outside
> of the interrupt?

That's probably the best approach.  Or if you're using a PIC18, you
could make your TMR0 interrupt high priority, which would allow it to
preempt your serial interrupt handler.

--
John W. Temples, III

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