9-4-1.asm

来自「书籍8051入门篇」· 汇编 代码 · 共 13 行

;9-4-1.ASM
$MOD51
	ORG	0000H
START:	MOV	TMOD,#11H	; TIMER0 = MODE1	   (1)
	MOV	TH0,#0D8H	; (65536-10000) / 256	   (2)
	MOV	TL0,#0F0H	; (65536-10000) % 256
	SETB	TR0		; START TIMER0		   (3)
;
LOOP:	JNB	TF0,LOOP	; WAIT FOR OVERFLOW	   (4)
	CLR	TF0		; CLEAR TF0		   (5)
	CPL	P1.0		; CPL P1.0		   (6)
	SJMP	LOOP		; WAIT FOR OVERFLOW AGAIN  (7)
	END