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32bits counter on PIC assembly ?

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bianchi77

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Guys,

How can I reduce the 32bits counter on Microchip assembly ?

I've done 16 bits :

Code: 
                 LedTimer    RES 2
; these lines will be done on 100ms Timer0 interrupt (btfss INTCON,T0IF)
	        movf 	    LedTimer,w		;for every 10 counts
    	 	btfss 	    STATUS,Z        ;check the counter if it's already zero
		return						;return to main loop
                
  		movf         LedTimer+1,w     ;for every 10 counts
                btfss         STATUS,Z        ;check the counter if it's already zero
                return 

counter
 	decf    LedTimer,F         ; Decrement low byte
        incfsz  LedTimer,W         ; Check for underflow
        incf    LedTimer+1,F       ; Update
        decf    LedTimer+1,F       ; Fixup
        movf    LedTimer,W
        iorwf   LedTimer+1,W       ; Set Z bit
		return

Any clues ?
Have a nice weekend,
Thanks
 

Take a look at **broken link removed**, may be it´s what you need

Simao Berkof


bianchi77 said:
Guys,

How can I reduce the 32bits counter on Microchip assembly ?

I've done 16 bits :

Code: 
                 LedTimer    RES 2
; these lines will be done on 100ms Timer0 interrupt (btfss INTCON,T0IF)
	        movf 	    LedTimer,w		;for every 10 counts
    	 	btfss 	    STATUS,Z        ;check the counter if it's already zero
		return						;return to main loop
                
  		movf         LedTimer+1,w     ;for every 10 counts
                btfss         STATUS,Z        ;check the counter if it's already zero
                return 

counter
 	decf    LedTimer,F         ; Decrement low byte
        incfsz  LedTimer,W         ; Check for underflow
        incf    LedTimer+1,F       ; Update
        decf    LedTimer+1,F       ; Fixup
        movf    LedTimer,W
        iorwf   LedTimer+1,W       ; Set Z bit
		return

Any clues ?
Have a nice weekend,
Thanks
Click to expand...
 

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