流水灯4.asm

单片机应用的基本程序

         ORG  0000H
         ORG 000BH
         LJMP BRT
         LJMP 1000H            
         ORG 1000H
 START:MOV TMOD,#01
       MOV TH0,#0FFH
       MOV TL0,#0B0H
       MOV IE,#82H
       SETB TR0
       MOV R0,#14H

  LOOP: JNB TF0,LOOP


 BRT:DJNZ R0,NEXT
     CPL P1.0
     MOV R0,#14H
NEXT: MOV TH0,#0FBH
      MOV TL0,#0B0H
      RETI
      END