编程在4个七段LED数码管上显示1234

文章摘要：START: MOV R0,#30H MOV R7,#4 MOV R2,#0FEH MOV DPTR,#TAB UP: MOV A,@R0 MOVC A,@A+DPTR MOV P1,A MOV P3,R2 LCALL D2MS INC R0 MOV A,R2

编程在4个七段LED数码管上显示1234,标签：单片机开发,单片机原理,单片机教程,http://www.88dzw.com

START:  MOV   R0,#30H
                MOV   R7,#4
                MOV   R2,#0FEH
                MOV   DPTR,#TAB
       UP:   MOV   A,@R0
                MOVC  A,@A+DPTR
                MOV    P1,A
                MOV    P3,R2
                LCALL  D2MS
                INC     R0
                MOV    A,R2
                RL      A
                MOV    R2,A
                DJNZ    R7,UP
                SJMP    START
  TAB :  DB    3FH,06H,5BH,4FH
              DB    66H,6DH,7DH,07H
              DB   7FH,6FH

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