第1个回答 2018-06-06
ORG 0000H
LJMP MAIN
ORG 0030H
MAIN;
MOV R2,#3
LOOP:
MOV A,#0FEH
MOV R3,#8
LOOP1:
MOV P0,A
LCALL DELAY
CLR C
RLC A
DJNZ R3,LOOP1
MOV P0,#00H
LCALL DELAY
MOV P0,#0FFH
LCALL DELAY
DJNZ R2,LOOP
SJMP $
DELAY:
MOV R4,#200
DLY:
MOV R5,#250
DJNZ R5,$
DJNZ R4,DLY
RET
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