Willie,
do you have anything at address 0x4 (the interrupt vector)? Otherwise,
the pic is just going to run from there on, which is probably not what
you want.
- Marcel

On 2/22/07, Willie Malan <willie.malan@deneloptronics.co.za> wrote:
> Good day
>
> I am fairly new to PIC microcontrollers and use the PIC16F690, which is
> on the PICkit2 starter kit. At the end of the routine, which is working
> fine, I want the PIC to go into sleep mode and must be wake up by a key
> on the keypad. Is there anyone that could comment/assist with the
> following code?  The first part is initialising / preparing for sleep
> and the latter (after the SLEEP instruction) set things to normal again.
> I do not know if all the initialising and clearing is necessary.
>
> Thanks
>
> Willie Malan
>
>
>
> movlw   0x7F                 ;RC7=0, col4 low, RC6,5,4=1 col 1,2,3 high
>
> movwf  PORTC
>
> movf    PORTA,W         ;read PortA as basis for interrupt
>
> bsf       IOCA,2              ;enable IOC
>
> bsf       INTCON,7          ;set GIE global interrupt enable
>
> bsf       INTCON,4          ;set INTE interrupt enable
>
> bsf       INTCON,3          ;set RABIE
>
> SLEEP
>
> NOP                             ;wait for * on keypad to wake up
>
> movf    PORTA,W         ;read PortA
>
> bcf       INTCON,7          ;clear GIE global interrupt enable
>
> bcf       INTCON,4          ;clear INTE interrupt enable
>
> bcf       INTCON,3          ;clear RABIE
>
> goto     Initialise
>
>
>
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