U盘挂载问题

un1

各位前辈，运行综合实验，U盘能被枚举识别，但是等待插入代码一直超时才能退出，退出后usbx.hdevclass也不为1是什么问题？谢谢。

usbapp_mode_set(0);            //ÉèÖÃΪUÅÌģʽ
temp=0;
  while(usbx.hdevclass==0&&temp<1000) //&micro;&Egrave;&acute;&yacute;U&Aring;&Igrave;±&raquo;&frac14;ì&sup2;&acirc;,×&icirc;&para;à&micro;&Egrave;&acute;&yacute;5&Atilde;&euml;
{
  usbapp_pulling();
  if((usbx.bDeviceState&(1<<6))==0&&temp>300)break;//1.5&Atilde;&euml;&Ouml;&Oacute;&Ouml;&reg;&Auml;&Uacute;,&Atilde;&raquo;&Oacute;&ETH;&frac14;ì&sup2;&acirc;&micro;&frac12;&Eacute;è±&cedil;&sup2;&aring;&Egrave;&euml;,&Ocirc;ò&Ouml;±&frac12;&Oacute;&Igrave;&oslash;&sup1;&yacute;,&sup2;&raquo;&Ocirc;&Ugrave;&micro;&Egrave;&acute;&yacute;
  delay_ms(5);
  temp++;
}
if(usbx.hdevclass==1)//&frac14;ì&sup2;&acirc;&micro;&frac12;&Aacute;&Euml;U&Aring;&Igrave;
{
  fs[2]->drv=2;
  f_mount(fs[2],"2:",1);      //&sup1;&Ograve;&Ocirc;&Oslash;&sup1;&Ograve;&Ocirc;&Oslash;U&Aring;&Igrave;
   res=exf_getfree("2:",&dtsize,&dfsize); //&micro;&Atilde;&micro;&frac12;U&Aring;&Igrave;&Ecirc;&pound;&Oacute;à&Egrave;&Yacute;&Aacute;&iquest;&ordm;&Iacute;×&Uuml;&Egrave;&Yacute;&Aacute;&iquest;     
}else res=0XFF;

正点原子

换个U盘试试