"Larry Bradley" <lhbradley@IGS.NET> wrote:

> I presume that I could disable interrupts before doing the I/O,
> and turn them on after. In this case, I think that the timer1
> counter would contain a number equal to the number of instruction
> cycles taken by the LCD routine. Since I have to preload the
> counter in the interrupt routine anyhow, in order to get an
> interrupt every 10 msecs, I think I can compute a new preload based
> on the existing counter, so the next timer cycle will be shorter,
> to compensate for the time lost in the LCD routine.
>
> This is my first time experimenting with timers and interrupts. Is
> what I'm proposing a good way to do this?

    Yes, that's a good way.  In practice, you "compute a new preload
    based on the existing counter" by replacing your current MOVWF
    TIMER1 with ADDWF TIMER1.

    -Andy

=== Andrew Warren -- aiw@cypress.com
=== Principal Design Engineer
=== Cypress Semiconductor Corporation
===
=== Opinions expressed above do not
=== necessarily represent those of
=== Cypress Semiconductor Corporation

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