Bill Meadows wrote:
>
> Can anyone please tell me why the following Pic16C84 code doesn't work!
> ;
> count equ 0c
> countn equ 0d
> countm equ 0e
> shift   equ     0f
>
>     org 000
> start

        clrf    portb
        bsf     status,rp0      ;SELECT REG. BANK 1

>     movlw 0            ;set port B
>     tris portb         ;for output

        bcf     status,rp0      ;SELECT REG. BANK 0

> ;    clrf portb         ;all lines low (8 LED's off)
> ;
>     movlw .9           ;number of
>     movwf count        ;          shifts
> ;
>     bcf status, c      ;clear carry flag
>     movlw b'00000001'  ;store
>     movwf shift        ;      pattern
> ;
> repeat
>     movf shift, w      ;get pattern
>     movwf portb        ;display pattern
>     call delay         ;                slowly
>     rlf shift          ;rotate pattern left
>     decfsz count       ;count-1 to count register by default
>     goto repeat        ;LEDs flash one at a time from right to left
> done goto done         ;program never gets to 'done'!
> ;
> delay                  ;Easy PIC'n pause routine(delay works great)
>
>     movlw 0ff          ;m
>     movwf countm       ;  to counter
> loadn
>     movlw 0ff          ;n
>     movwf countn       ;  to counter
> decn
>     decfsz countn      ;decrement n
>     goto decn          ;again
>     decfsz countm      ;decrement m
>     goto loadn         ;again
>     return             ;done
>
> Thanks for the help,
> Bill Meadows
Hi,
Try this.
Saras.