dd.asm

本压缩包包含1602液晶显示

   ORG 00H
   MOV 40H,#01
   MOV 41H,#03
START:CALL DISP
      JMP START

DISP: MOV A,41H
      ANL A,#0FH
      MOV 66H,A
      MOV DPTR,#TABLE
      MOVC A,@A+DPTR
      CLR P3.3
      MOV P1,A
      CALL DELAY
      SETB P3.3
      MOV A,R5
      ANL A,#0F0H
      SWAP A
      MOV DPTR,#TABLE
      MOVC A,@A+DPTR
      CLR P3.4
      MOV P1,A
      CALL DELAY
      SETB P3.4
      MOV A,40H
      ANL A,#0FH
      MOV DPTR,#TABLE
      MOVC A,@A+DPTR
      CLR P3.5
      MOV P1,A
      CALL DELAY
      SETB P3.5
      CLR A
      SETB P3.0
      RET
TABLE:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,0FFH,90H      
DELAY:MOV R6,#10
D1:   MOV R7,#248
      DJNZ R7,$
      DJNZ R6,D1
      RET
      END