s6-5.asm

手把手叫你学单片机

	ORG 0000H
	LJMP MAIN
	ORG 0030H
 MAIN: 	MOV P1,#28H
	ACALL DELAY
	MOV P3,#0F0H
	MOV A,P3
	CJNE A,#0F0H,F1
	AJMP MAIN
F1:MOV P0,#0
   MOV P1,#7EH   ; DISPLAY 1
	ACALL DELAY
	MOV P1,#0A2H		;DISPLAY 2
	ACALL DELAY
	MOV P1,#62H        ;DISPLAY 3
	ACALL DELAY
	MOV P1,#74H        ;DISPLAY 4
	ACALL DELAY
	MOV P1,#61H			;DISPLAY 5
	ACALL DELAY
	MOV P1,#21H
	ACALL DELAY
	MOV P1,#7AH
	ACALL DELAY
	MOV P1,#20H
	ACALL DELAY
	MOV P1,#60H
	ACALL DELAY
	AJMP MAIN
	
DELAY:MOV R5,#0FFH
DEL1: MOV R6,#0FFH
DEL2: MOV R7,#0FH
DEL3: DJNZ R7,DEL3
		DJNZ R6,DEL2
		DJNZ R5,DEL1
		RET

		END