Simulation Problem

[williB]

no im not using the interrupt.

but if i didnt debounce then when its first pressed the lights would go off ... but then it will get back to checking the port again before the switch would have time to settle? so the lights might come back on again.


but anyway ... even if i used the delay in a circuit that needed debouncing ...would a delay of 10 ms do it?

thanks
Kane

i suppose it would depend on the type of switch

 

[dex3844]

Hi, I have a similar problem -----
cant get out of delay loop with PIC simulator IDE - any help appreciated

---------------EQUATES----------------------
MCOUNT			EQU		0X0C			
NCOUNT			EQU		0X1D
--------------------------------------------------
;---------------------------------------DELAY--------------------------------------------------

DELAY			MOVLW	0XFF			;0.2S DELAY
				MOVWF	MCOUNT			;MOVING CONTENTS OF WORKING REGISTER TO MCOUNT
GET_N			MOVLW	0XFF			;LOAD WORKING REGISTER WITH VALUE
				MOVWF	NCOUNT			;MOVING CONTENTS OF WORKING REGISTER TO NCOUNT
DEC_N			DECFSZ	NCOUNT,F		;DECREMENT NCOUNT AND SKIP IF ZERO
				GOTO	DEC_N	
				DECFSZ	MCOUNT,F		;DECREMENT MCOUNT AND SKIP IF ZERO
				GOTO	GET_N
				RETURN

Thanks in advance

 

[Ian Rogers]

Are you sure you aren't waiting long enough.... This will take 65536 iterations.... even extremely fast simulation it will take a while... The REAL time at 4mhz is about 13 Seconds

 

[dex3844]

okay that might just be it - i was trying to get about 2 seconds of delay - how would i do that

 

[Ian Rogers]

Wait 2 seconds... Look at the "Actual time" on the sim.. That's the delay you want...

 

[jpanhalt]

Just add a breakpoint after the delay loop. (Use a NOP, if necessary, but it usually isn't needed.) Then use "run" and you will hardly notice it is there. You can also comment out the delay, but I don't like doing that.

John

 

[dex3844]

@Ian Rogers - thanks thats what I was looking for
@jpanhalt - the NOP worked