/* USB Endpoint 1 Event Callback Called automatically on USB Endpoint 1 Event Parameter: event  */
void USB_EndPoint1(uint32_t event)
/* USB Endpoint 1 Event Callback Called automatically on USB Endpoint 1 Event Parameter: event  */
void USB_EndPoint1(uint32_t event)
{
    case USB_EVT_IN:
      temp = CDC_GetSerialState();
      if (serialState != temp) {
         serialState = temp;
         CDC_NotificationIn();
      }
      break;
  }
}