多路开关状态指示
ORG 00H
START:JB P2.0,NEXT1
CLR P2.4
SJMP NEX1
NEXT1:SETB P2.4
NEX1:JB P2.1,NEXT2
CLR P2.5
SJMP NEX2
NEXT2:SETB P2.5
NEX2:JB P2.2,NEXT3
CLR P2.6
SJMP NEX3
NEXT3:SETB P2.3
NEX3:JB P2.7,NEXT4
CLR P2.4
SJMP NEX4
NEXT4:SETB P2.4
NEX4:SJMP START
END
这样只是按下开关亮,我想相反,并且想添加一个报警装置,弹开则灯亮,报警
哪位大神帮帮我
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