求一程序的流程圖

ID:8001 · 發(fā)表于 2008-12-21 20:04

程序ORG   0000H
       LJMP START
       ORG   0100H
START: MOV A,#02H
       CLR C
       MOV R1,#02H
   M1: MOV R1,#08H
LOOP: RLC A
       MOV P1,A
       CALL DELAY
       DJNZ R2,LOOP
       DJNZ R1,M1
       MOV R1,#02H
   M2: MOV R2,#07H
LOOP1: RRC A
       MOV P1,A
       CALL DELAY
       DJNZ R2,LOOP1
       DJNZ R1,M1
       MOV R1,#02H
   M3: MOV R2,#0FFH
       CALL DELAY
       MOV P1,#00H
       CALL DELAY
       DJNZ R1,M3
       JMP START
DELAY: MOV R3,#20
   D1: MOV R4,#20
   D2: MOV R5,#248
       DJNZ R5,$
       JNZ R4,D2
       DJNZ R3,D1
       RET
       END

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