p7_2.asm

单片机原理与应用实例教程 单片机原理与应用实例教程

		ORG		0000H
		LJMP	MAIN
		ORG		4100H
MAIN:	MOV A, #0H
		MOV DPTR, #CASE
LOOP:	JMP @A + DPTR

CASE:	AJMP TYPE0
		AJMP TYPE1
		AJMP TYPE2
		AJMP TYPE3

TYPE0:	MOV P1, #10000100B
		MOV A, #2H
		ACALL DELAY
		ACALL DELAY
		AJMP LOOP
TYPE1:	MOV P1, #01000010B
		MOV A, #4H
		ACALL DELAY
		AJMP LOOP
TYPE2:	MOV P1, #00100001B
		MOV A, #6H
		ACALL DELAY
		ACALL DELAY
		AJMP LOOP
TYPE3:	MOV P1, #01000010B
		MOV A, #0H
		ACALL DELAY
		AJMP LOOP

DELAY:	MOV	R5, #0AH
DL3:	MOV R7,#082H		;延迟程序
DL1:	MOV R6,#0FFH
DL2:	DJNZ R6,DL2
		DJNZ R7,DL1
		DJNZ R5, DL3
		RET	


	END