📄 电梯.asm
字号:
org 0000h
main: clr p1.6
clr p1.7
jb p2.6,down
jb p2.7,up
jb p1.0,first
jb p1.1,second
jb p1.2,third
jb p1.3,fourth
sjmp main
first: mov p2,#01h
sjmp stop
second: mov p2,#02h
sjmp stop
third: mov p2,#03h
sjmp stop
fourth: mov p2,#04h
sjmp stop
down: jb p1.0,first
clr p1.7
setb p1.6
acall del
jb p1.0,first
jb p1.1,second
jb p1.2,third
jb p1.3,fourth
sjmp down
up: jb p1.3,fourth
clr p1.6
setb p1.7
acall del
jb p1.0,first
jb p1.1,second
jb p1.2,third
jb p1.3,fourth
sjmp up
stop: clr p1.6
clr p1.7
sjmp main
del: mov r5,#5
d1: mov R6,#255
d2: mov r7,#255
djnz r7,$
djnz r6,d2
djnz r5,d1
ret
end
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