cach dung timer va counter

**tiendungkct** · 25-10-2007, 08:46 AM

đây là 1 đoan mình viết delay cho timer 1 hy vọng co ích cho bạn

Code:

;=================DELAY=========================
DELAY
	BSF		STATUS,RP0
	BCF		STATUS,RP1;BANK1
	CLRF	PIE1	;XOA CO NGAT TMR1IE
	CLRF	INTCON	;CAM CAC NGAT GIE
	BCF	STATUS,RP0
	BCF	STATUS,RP1	;BANK0
	CLRF	T1CON
	CLRF	PIR1	;XOA CO TRAN TIMER1(TMR1IF)
	CLRF	TMR1L	; xoa gia tri 
	CLRF	TMR1H
	MOVLW	0X30	;PRESCALES 1:8
					;KO CHO TIMER 1 HOAT DONG TMR1ON=0
					;CHE DO TIMER TMR1CS=0
					;KO CHO BO DAO DONG HOAT DONG T1CSCEN=0
	MOVWF	T1CON
	BSF		T1CON,TMR1ON; CHO TIMER CHAY
RE1
	BTFSS	PIR1,TMR1IF ; KIEM TRA CO TRAN 
	GOTO	RE1			; NEU CHU TRAN
	BCF	PIR1,TMR1IF	; XOA CO TRAN
	RETURN
END