汇编语言驱动51开发板的八位数码管显示12345678 静态显示

;数码管显示三个步骤
;1 位选P2.2  P2.3 P2.4  连接在译码器上
;2 段选，参照共阴数码管的段码表
;3 消影
 
MAIN: 
  MOV  P2,#00000000B      ;位选
  MOV  P0,#06H        ;段选.显示数码1
    LCALL  DELAY2MS       ;延时消影
  MOV  P0,#00H        ;延时消影
 
  MOV  P2,#00000100B      ;位2
    MOV  P0,#5BH          ;显示2
    LCALL  DELAY2MS
  MOV  P0,#00H
 
  MOV  P2,#00001000B      ;3
    MOV  P0,#4FH          
    LCALL  DELAY2MS
  MOV  P0,#00H
 
  MOV  P2,#00001100B      ;4
    MOV  P0,#66H  
    LCALL  DELAY2MS
  MOV  P0,#00H
 
  MOV  P2,#00010000B      ;5
    MOV  P0,#6DH  
    LCALL  DELAY2MS
  MOV  P0,#00H
 
  MOV  P2,#00010100B      ;6
    MOV  P0,#7DH  
    LCALL  DELAY2MS
  MOV  P0,#00H
 
  MOV  P2,#00011000B      ;7
    MOV  P0,#07H  
    LCALL  DELAY2MS
  MOV  P0,#00H
 
  MOV  P2,#00011100B      ;8
    MOV  P0,#7FH  
    LCALL  DELAY2MS
  MOV  P0,#00H
 
    SJMP  MAIN
 
DELAY2MS:     ;@11.0592MHz
  NOP
  PUSH 30H
  PUSH 31H
  MOV 30H,#4
  MOV 31H,#141
NEXT:
  DJNZ 31H,NEXT
  DJNZ 30H,NEXT
  POP 31H
  POP 30H
  RET
END