9-5-2.asm

书籍8051入门篇

;9-5-2.ASM
$MOD51
	ORG	0000H
START:	MOV	TMOD,#12H	; TIMER0 = MODE2
	MOV	TH0,#9CH	; (256-100)
	SETB	TR0		; START TIMER0
;
LOOP:	JNB	TF0,LOOP	; WAIT FOR OVERFLOW
	CLR	TF0		; RELOAD TIMER0 SETTINGS
	CPL	P1.0		; CPL P1.0
	SJMP	LOOP		; WAIT FOR OVERFLOW AGAIN
;	
	END