screen.asm

汇编小程序

            ORG 0000H
			AJMP MAIN
			ORG 0030H
MAIN:       CLR P2.0
            MOV P0,#028H
			ACALL DEL
			MOV P0,#0FFH
			CLR P2.1
			MOV P0,#07EH
			ACALL DEL
			MOV P0,#0FFH
			CLR P2.2
			MOV P0,#0A2H
			ACALL DEL
			MOV P0,#0FFH
			CLR P2.3
			MOV P0,#062H
			ACALL DEL
			MOV P0,#0FFH
			CLR P2.4
			MOV P0,#074H
			ACALL DEL
			MOV P0,#0FFH
			CLR P2.5
			MOV P0,#061H
			ACALL DEL
			MOV P0,#0FFH
			CLR P2.6
			MOV P0,#021H
			ACALL DEL
			MOV P0,#0FFH
			CLR P2.7
			MOV P0,#07AH
			ACALL DEL
			MOV P0,#0FFH
		    AJMP MAIN
DEL:        MOV R5,#04H
DEL1:       MOV R6,#0FFH
DEL2:       MOV R7,#0FFH
DEL3:       DJNZ R7,DEL3
            DJNZ R6,DEL2
			DJNZ R5,DEL1
			RET
			END