led.asm

来自「我学单片机89C51时编的大部分程序都在里面」· 汇编 代码 · 共 63 行

     ORG   0000H
     AJMP  MAIN
     ORG   001BH
     AJMP  TIME
MAIN: MOV  R6,#8H
      MOV  A,#09H
      PUSH A
      CLR  A


STATE1:SETB C
      RRC  A
      MOV  P,A
      POP  A
      MOV  TMOD,#10H
      MOV  TH1,#3CH
      MOV  TL1,#B0H
      SETB TR1
LOOP1:  CJNE A,20H,LOOP1
        DJNZ R6,STATE1
        CLR  TR1
        CLR  20H


        MOV  R6,#8H
STATE2: CLR C
        RRC  A
        MOV  P,A
        POP A
        MOV  TMOD,#10H
        MOV  TH1,#3CH
        MOV  TL1,#B0H
        SETB TR1
LOOP2:  CJNE A,20H,LOOP2
        DJNZ R6,STATE2
        CLR  TR1

STATE3:MOV A,0FFH
       MOV P,A
       POP A
        MOV  TMOD,#10H
        MOV  TH1,#3CH
        MOV  TL1,#B0H
        SETB TR1
LOOP3:  CJNE A,20H,LOOP3

STATE4:MOV A,00H
       MOV P,A
       POP A
        MOV  TMOD,#10H
        MOV  TH1,#3CH
        MOV  TL1,#B0H
        SETB TR1
LOOP4:  CJNE A,20H,LOOP4
SJMP  $

ORG   0200H
TIME: INC  20H
      MOV  TMOD,#10H
      MOV  TH1,#3CH
      MOV  TL1,#B0H
      SETB TR1