Not sure if you got my previous e-mail about the color coded ISR? That one
helps you to understand the structure. Anyway, just a small modification to
that that includes your LED_TIMER variable:

;************************ INTERRUPT ROUTINE
*********************************

       org         0x0004          ; Interrupt vector

pologue

       movwf       w_temp          ; Saves value in register W

       movf        STATUS          ; Saves value in register STATUS

       movwf       status_temp

       movf        PCLATH          ; Saves value in register PCLATH

       movwf       pclath_temp



isr_case_TMR0

       banksel     INTCON          ; Selects bank containing INTCON

       btfsc       INTCON, TMR0IF  ; Check if interrupt occurred by TMR0

       goto        isr_tmr0        ; Yes, go to it=92s ISR

isr_default

       goto        epilogue



isr_tmr0

       banksel     LED_TIMER       ; Selects bank containing LED_TIMER

       movf        LED_TIMER,f     ; Check if register LED_TIMER is 0

       btfsc       STATUS,Z        ; Only when it is non-zero, it...

       decf        LED_TIMER       ; Decrements register COUNTER by 1



eoi_tmr0

       banksel     INTCON          ; Selects bank containing INTCON

       bcf         INTCON,TMR0IF   ; Clears interrupt flag TMR0IF



epilogue

       movf        pclath_temp,w   ; PCLATH is given its original content

       movwf       PCLATH

       movf        status_temp,w   ; STATUS is given its original content

       movwf       STATUS

       swapf       w_temp,f        ; W is given its original content

       swapf       w_temp,w



       retfie                      ; Return from interrupt routine


Now in the main loop you check if LED_TIMER is zero. If it is, then turn
led on or off depending on the state plus set LED_TIMER to the designated
value.

Tamas



On 4 July 2013 06:15, Electronic Consultation <
electronic.consultation.au@gmail.com> wrote:

> or :
>
> counting     btfss  INTCON,T0IF         ;is timer0 interrupt flag true ?
>                       goto zero_status
>                       bcf     INTCON,T0IF            ;if T0IF=3Dfalse
> clear timer0 interrupt flag
>                        decf    LedTimer,1          ;if T0IF=3Dtrue reduce
> the counter
>                       ;check if LedTimer =3D 0 ?
>          zero_status     btfsc     STATUS, Z             ;Z bit is set
> to 1 if W was 00 - skip next instruction if not 00
>                        ;LedTimer=3D0
>                       goto   counting          ;from btfsc if it's 1, go
> to next state
>                       ;LedTimer!=3D0
>                        goto   next_state            ;from btfsc if it's
> 0 keep counting interrupt
>
>          next_state    incf    LedState,1            ; if 00 increase
> the state, for the next state
>                             return
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>



--=20
int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.