STM32 软件断开连接 USB 设备问题(在线等！比较急！)

void USB_OTG_BSP_DeInit(void)

{

 #ifdef USE_USB_OTG_FS

  GPIOA->MODER &= ~(0x0ful << 11*2);

  RCC->AHB2RSTR |= RCC_AHB2Periph_OTG_FS;

  RCC->AHB2RSTR &= ~(RCC_AHB2Periph_OTG_FS);

#endif

}

/**

  ******************************************************************************

  * @file    usb_bsp.c

  * @author  MCD Application Team

  * @version V1.1.0

  * @date    19-March-2012

  * @brief   This file is responsible to offer board support package and is 

  *          configurable by user.

  ******************************************************************************

  * @attention

  *

  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>

  *

  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");

  * You may not use this file except in compliance with the License.

  * You may obtain a copy of the License at:

  *

  *        http://www.st.com/software_license_agreement_liberty_v2

  *

  * Unless required by applicable law or agreed to in writing, software 

  * distributed under the License is distributed on an "AS IS" BASIS, 

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  *

  ******************************************************************************

  */