Problem with delay routine

[jccsantos]

picloops v.2.1

Hi,

I want to make a delay of 3600 sec. with this code:

; Delay = 3600 seconds
; Clock frequency = 4 MHz

; Actual delay = 3600 seconds = 3600000000 cycles
; Error = 0 %

	cblock
	d1
	d2
	d3
	d4
	endc

Delay
			;3599999989 cycles
	movlw	0xFE
	movwf	d1
	movlw	0x84
	movwf	d2
	movlw	0xD8
	movwf	d3
	movlw	0x18
	movwf	d4
Delay_0
	decfsz	d1, f
	goto	$+2
	decfsz	d2, f
	goto	$+2
	decfsz	d3, f
	goto	$+2
	decfsz	d4, f
	goto	Delay_0

			;7 cycles
	goto	$+1
	goto	$+1
	goto	$+1
	nop

			;4 cycles (including call)
	return

; Generated by [I]**broken link removed**[/I] (December 7, 2005 version)
; Wed Sep 26 15:17:24 2007 GMT

; See also various delay routines at [url]http://www.piclist.com/techref/microchip/delays.htm[/url]

work´s great,
But i need to add this :

........
Delay_0
	btfss	Tecla
	goto	Main1
	decfsz	t1, f
	goto	$+2
	decfsz	t2, f
	goto	$+2
	decfsz	t3, f
	goto	$+2
	decfsz	t4,f
	goto	Delay_0
............

now the time is broken....... 2 cycles added......
How can i calc the rigth value for the delay routine????

There is any formula to calc this type of delay´s? type we enter the program and they give the cycles?????


Thank´s in advance.

 

[nguyennam]

picloops

You can download and use PicLoops v.2.1 freeware from:

**broken link removed**

It is really excellent gift from Mr. Boucher.