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main:mov scon,#50h;串口方式1，允許接收
mov tmod,#20h;00100000B,定時器T1自動重裝入8位定時器,方式2
mov th1,#0fdh;波特率9600
mov tl1,#0fdh
setb tr1
jieshou:jnb ri,$;在此處接收主機數(shù)據(jù)
clr ri
mov a,sbuf
cjne a,#1,jieshou
cpl p3.2
lcall d250ms
ajmp jieshou
d250ms:mov 31h,#250
p2212:mov 32h,#250
wt22:nop
nop
djnz 32h,wt22
djnz 31h,p2212
ret
end |
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