gnupic: Re: [gnupic] problems with timer0/interrupts
Subject:
Re: [gnupic] problems with timer0/interrupts
From:
Robert Pearce ####@####.####
Date:
3 Sep 2008 22:10:55 -0000
Message-Id: <Z1w4jJh0pwvIFwDX@daniel.huneausware.local>
On Wed, 3 Sep 2008, Lope Vega ####@####.#### wrote :
>
>Then, what did was to setup interrupts for RB4:7 pins' state change,
>and within it's processing function, try to use timer0 to debounce the
>switch.
>
>However, when I program the device and place it on it's side of the
>breadboard, it seems the pic falls into the interrupt, and that the
>timer0 polling causes it to recurse into it undefinetely.
> ;;
> ;; rb* interrupt-handler
> ;;
>_handle_rb_interrupt code
>handle_rb_interrupt:
--- you need to add
movf portb,w
here ---
> ;; clear it's flag bit
> bcf intcon, rbif
>
If I remember rightly, the portb interrupt on change function continues
to see the change until you read portb. You are not reading portb in
your ISR, so clearing the rbif bit is not doing any good.
--
Rob Pearce http://www.bdt-home.demon.co.uk
The contents of this | Windows NT crashed.
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