串行口驱动1位led数码管的设计.asm

基于Proteus的51系列单片机设计与仿真

      ORG  00H
      AJMP START
      ORG  0003H
      AJMP INT
START:MOV  SCON,#00H
      SETB IT0
      SETB EA
      SETB EX0
      MOV  SBUF,#3FH      
      MOV  DPTR,#TABLE 
LP:   CLR  TI      
      AJMP LP
INT:  INC  DPTR
      MOV  A,#00H
      MOVC A,@A+DPTR
      CJNE A,#1BH,LP1
      AJMP LP2
LP1:  MOV  SBUF,A
      JBC  TI,LP1
      AJMP LP3
LP2:  MOV  DPTR,#TABLE      
LP3:  NOP
      RETI
TABLE:DB 3FH,3FH,06H,5BH,4FH,66H
      DB 6DH,7DH,07H,7FH,6FH,1BH
      RET
      END