è·é©¬ç¯ç¨åºç¨æ±ç¼æ¯å¾å¥½å®ç°çï¼åªè¦ç¨å¥½å¾ªç¯ç§»ä½æ令就å¯ä»¥ï¼ä»¥ä¸æ¯ç¨åºã
ORG 0000H
LJMP MAIN
ORG 0030H
MAIN:
MOV A,#0FEH
LOOP:
MOV P1,A ï¼å°æ§å¶åé端å£
RL A ï¼æ§å¶å循ç¯å·¦ç§»
LCALL DELAY ï¼å»¶æ¶
SJMP LOOP
DELAY: ;延æ¶å¤§æ¦1ç§
MOV R2,#10
DLY1:
MOV R3,#200
DLY2:
MOV R4,#250
DJNZ R4,$
DJNZ R3,DLY2
DJNZ R2,DLY1
RET
END