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main(void)
{
P1^1=1;//é»è®¤çº¢å¤ç®¡é«çµå¹³
P1^2=0;//å
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while(1)
{
if(p1^1=0)
{
P1^2=1;æå¼ç»§çµå¨
}
else {
P1^2=0;//å
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}
}
}
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