电脑端关闭串口后程序死循环在usb中断

棒棒糖l · 发表于 2018-3-25 11:06:20

USB虚拟串口，在USB没有插入电脑时程序正常运行，在插入电脑后，电脑端的上位机必须打开串口后程序才正常运行但是无法进入其他中断，关闭串口后程序死在USB中断。
USB中断函数如下，其他描述如图
/**
* @brief  STM32_USBF_OTG_ISR_Handler
*       handles all USB Interrupts
* @param  pdev: device instance
* @retval status
*/
uint32_t USBD_OTG_ISR_Handler (USB_OTG_CORE_HANDLE *pdev)
{
  USB_OTG_GINTSTS_TypeDef  gintr_status;
  uint32_t retval = 0;

  if (USB_OTG_IsDeviceMode(pdev)) /* ensure that we are in device mode */
  {
gintr_status.d32 = USB_OTG_ReadCoreItr(pdev);
if (!gintr_status.d32) /* avoid spurious interrupt */
{
   return 0;
}

if (gintr_status.b.outepintr)
{
   retval |= DCD_HandleOutEP_ISR(pdev);
}

if (gintr_status.b.inepint)
{
   retval |= DCD_HandleInEP_ISR(pdev);
}

if (gintr_status.b.modemismatch)
{
   USB_OTG_GINTSTS_TypeDef  gintsts;

   /* Clear interrupt */
   gintsts.d32 = 0;
   gintsts.b.modemismatch = 1;
   USB_OTG_WRITE_REG32(&pdev->regs.GREGS->GINTSTS, gintsts.d32);
}

if (gintr_status.b.wkupintr)
{
   retval |= DCD_HandleResume_ISR(pdev);
}

if (gintr_status.b.usbsuspend)
{
   retval |= DCD_HandleUSBSuspend_ISR(pdev);
}
if (gintr_status.b.sofintr)
{
   retval |= DCD_HandleSof_ISR(pdev);

}

if (gintr_status.b.rxstsqlvl)
{
   retval |= DCD_HandleRxStatusQueueLevel_ISR(pdev);

}

if (gintr_status.b.usbreset)
{
   retval |= DCD_HandleUsbReset_ISR(pdev);

}
if (gintr_status.b.enumdone)
{
   retval |= DCD_HandleEnumDone_ISR(pdev);
}

if (gintr_status.b.incomplisoin)
{
   retval |= DCD_IsoINIncomplete_ISR(pdev);
}
if (gintr_status.b.incomplisoout)
{
   retval |= DCD_IsoOUTIncomplete_ISR(pdev);
}
#ifdef VBUS_SENSING_ENABLED
if (gintr_status.b.sessreqintr)
{
   retval |= DCD_SessionRequest_ISR(pdev);
}
if (gintr_status.b.otgintr)
{
   retval |= DCD_OTG_ISR(pdev);
}
#endif
  }
  return retval;
}