Hey Piclisters...
 
I am trying to wake from sleep by "interrupt on change"... I am using the
PIC16F690
I have a Chip Select signal that drops on PORTB,6. I want to wake up when
this happens.

I have the following code in init

bcf  INTCON,GIE        ;Initialize interrupt system
bsf  INTCON,PEIE
bsf  STATUS,RP0 ;Bank 1
bsf  PIE1,TMR2IE ;Enable Timer2 
bcf  STATUS,RP0 ;Bank 0
bcf  PIR1,TMR2IF ;Clear Timer2 

bcf  INTCON,RABIE    ;Set up Wake up on PortB, TAG_CS
bsf  STATUS,RP1      ;Select Bank 2
bsf  STATUS,RP0      ;Select Bank 2
bsf  IOCB,6
bcf  STATUS,RP1      ;Select Bank 1
bsf  STATUS,RP0      ;Select Bank 1
clrf IOCA 
bcf  INTCON,RABIF
bcf  STATUS,RP0      ;Select Bank 0
bcf  STATUS,RP1      ;Select Bank 0

Later in the Main Code I try the following...

bsf  INTCON,RABIE
bsf  INTCON, PEIE
bcf  INTCON,RABIF
movf  PORTB,W
SLEEP
bcf  INTCON,RABIF

bsf PORTB, 7
bcf PORTB, 7

The Set & Clear on PORTB,7 at the end is to see in a scope if it wakes from
sleep.

It never wakes from sleep.

Any ideas on what I am doing wrong?

Thanks in advance,
Jeff Anno
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