led2.asm

led显示小程序

 		ORG 0000H
        AJMP MAIN
        ORG 0100H

MAIN:   MOV DPTR,#TAB
		MOV R7,  #00H
		MOV R2,  #00H

DSUP0:  MOV   R6, #00H
DSUP:   MOV   A, R2
		MOVC  A,@A+DPTR
		MOV   P0,A
		CLR   P2.4
		SETB  P2.5
		LCALL DELAY

		MOV   A, R7
		MOVC  A,@A+DPTR
		MOV   P0, A
		SETB  P2.4
		CLR   P2.5
		LCALL DELAY

		INC   R6
		CJNE  R6, #3FH,DSUP

		INC   R2
		ACALL DELAY
		CJNE  R2,#0AH,DSUP0
		INC   R7
		MOV   R2,#00H
		CJNE  R7,#0AH,DSUP0
		AJMP  MAIN

DELAY:  MOV  R3, #01H
DELAY1: MOV  R4, #028H
DELAY2: MOV  R5, #05AH
DELAY3: DJNZ R5, DELAY3
        DJNZ R4, DELAY2
		DJNZ R3, DELAY1 
		RET
 
TAB:    DB  3FH, 06H, 5BH, 4FH, 66H, 6DH, 7DH, 07H, 7FH, 6FH, 77H, 7CH, 39H, 5EH, 79H, 71H;
        ;   0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
  
        END