text: /**
    ******************************************************************************
    * @file           : usbd_conf.c
    * @version        : v2.0_Cube
    * @brief          : This file implements the board support package for the USB device library
    ******************************************************************************
    * This notice applies to any and all portions of this file
    * that are not between comment pairs USER CODE BEGIN and
    * USER CODE END. Other portions of this file, whether 
    * inserted by the user or by software development tools
    * are owned by their respective copyright owners.
    *
    * Copyright (c) 2018 STMicroelectronics International N.V. 
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without 
    * modification, are permitted, provided that the following conditions are met:
    *
    * 1. Redistribution of source code must retain the above copyright notice, 
    *    this list of conditions and the following disclaimer.
    * 2. Redistributions in binary form must reproduce the above copyright notice,
    *    this list of conditions and the following disclaimer in the documentation
    *    and/or other materials provided with the distribution.
    * 3. Neither the name of STMicroelectronics nor the names of other 
    *    contributors to this software may be used to endorse or promote products 
    *    derived from this software without specific written permission.
    * 4. This software, including modifications and/or derivative works of this 
    *    software, must execute solely and exclusively on microcontroller or
    *    microprocessor devices manufactured by or for STMicroelectronics.
    * 5. Redistribution and use of this software other than as permitted under 
    *    this license is void and will automatically terminate your rights under 
    *    this license. 
    *
    * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 
    * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
    * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
    * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 
    * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
    * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
    * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
    * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
    * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
    * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    ******************************************************************************
    */
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f0xx.h"
  #include "stm32f0xx_hal.h"
  #include "usbd_def.h"
  #include "usbd_core.h"
  #include "usbd_msc.h"
  
  /* USER CODE BEGIN Includes */
  
  /* USER CODE END Includes */
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  
  /* USER CODE BEGIN PV */
  /* Private variables ---------------------------------------------------------*/
  
  /* USER CODE END PV */
  
                  PCD_HandleTypeDef hpcd_USB_FS;
  void _Error_Handler(char * file, int line);
  
  /* USER CODE BEGIN 0 */
  
  /* USER CODE END 0 */
  
  /* USER CODE BEGIN PFP */
  /* Private function prototypes -----------------------------------------------*/
  
  /* USER CODE END PFP */
  
  /* Private functions ---------------------------------------------------------*/
  
  /* USER CODE BEGIN 1 */
  static void SystemClockConfig_Resume(void);
  /* USER CODE END 1 */
  void HAL_PCDEx_SetConnectionState(PCD_HandleTypeDef *hpcd, uint8_t state);
  extern void SystemClock_Config(void);
  
  /*******************************************************************************
                         LL Driver Callbacks (PCD -> USB Device Library)
  *******************************************************************************/
  /* MSP Init */
  
  void HAL_PCD_MspInit(PCD_HandleTypeDef* pcdHandle)
  {
    if(pcdHandle->Instance==USB)
    {
    /* USER CODE BEGIN USB_MspInit 0 */
  
    /* USER CODE END USB_MspInit 0 */
      /* Peripheral clock enable */
      __HAL_RCC_USB_CLK_ENABLE();
  
      /* Peripheral interrupt init */
      HAL_NVIC_SetPriority(USB_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(USB_IRQn);
    /* USER CODE BEGIN USB_MspInit 1 */
  
    /* USER CODE END USB_MspInit 1 */
    }
  }
  
  void HAL_PCD_MspDeInit(PCD_HandleTypeDef* pcdHandle)
  {
    if(pcdHandle->Instance==USB)
    {
    /* USER CODE BEGIN USB_MspDeInit 0 */
  
    /* USER CODE END USB_MspDeInit 0 */
      /* Peripheral clock disable */
      __HAL_RCC_USB_CLK_DISABLE();
  
      /* Peripheral interrupt Deinit*/
      HAL_NVIC_DisableIRQ(USB_IRQn);
  
    /* USER CODE BEGIN USB_MspDeInit 1 */
  
    /* USER CODE END USB_MspDeInit 1 */
    }
  }
  
  /**
    * @brief  Setup stage callback
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_SetupStageCallback(PCD_HandleTypeDef *hpcd)
  {
    USBD_LL_SetupStage((USBD_HandleTypeDef*)hpcd->pData, (uint8_t *)hpcd->Setup);
  }
  
  /**
    * @brief  Data Out stage callback.
    * @param  hpcd: PCD handle
    * @param  epnum: Endpoint number
    * @retval None
    */
  void HAL_PCD_DataOutStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
  {
    USBD_LL_DataOutStage((USBD_HandleTypeDef*)hpcd->pData, epnum, hpcd->OUT_ep[epnum].xfer_buff);
  }
  
  /**
    * @brief  Data In stage callback.
    * @param  hpcd: PCD handle
    * @param  epnum: Endpoint number
    * @retval None
    */
  void HAL_PCD_DataInStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
  {
    USBD_LL_DataInStage((USBD_HandleTypeDef*)hpcd->pData, epnum, hpcd->IN_ep[epnum].xfer_buff);
  }
  
  /**
    * @brief  SOF callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_SOFCallback(PCD_HandleTypeDef *hpcd)
  {
    USBD_LL_SOF((USBD_HandleTypeDef*)hpcd->pData);
  }
  
  /**
    * @brief  Reset callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_ResetCallback(PCD_HandleTypeDef *hpcd)
  { 
    USBD_SpeedTypeDef speed = USBD_SPEED_FULL;
  
    /* Set USB current speed. */
    switch (hpcd->Init.speed)
    {
    case PCD_SPEED_FULL:
      speed = USBD_SPEED_FULL;
      break;
  	
    default:
      speed = USBD_SPEED_FULL;
      break;    
    }
    USBD_LL_SetSpeed((USBD_HandleTypeDef*)hpcd->pData, speed);
    
    /* Reset Device. */
    USBD_LL_Reset((USBD_HandleTypeDef*)hpcd->pData);
  }
  
  /**
    * @brief  Suspend callback.
    * When Low power mode is enabled the debug cannot be used (IAR, Keil doesn't support it)
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_SuspendCallback(PCD_HandleTypeDef *hpcd)
  {
    /* Inform USB library that core enters in suspend Mode. */
    USBD_LL_Suspend((USBD_HandleTypeDef*)hpcd->pData);
    /* Enter in STOP mode. */
    /* USER CODE BEGIN 2 */
    if (hpcd->Init.low_power_enable)
    {
      /* Set SLEEPDEEP bit and SleepOnExit of Cortex System Control Register. */
      SCB->SCR |= (uint32_t)((uint32_t)(SCB_SCR_SLEEPDEEP_Msk | SCB_SCR_SLEEPONEXIT_Msk));
    }
    /* USER CODE END 2 */
  }
  
  /**
    * @brief  Resume callback.
    * When Low power mode is enabled the debug cannot be used (IAR, Keil doesn't support it)
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_ResumeCallback(PCD_HandleTypeDef *hpcd)
  {
    /* USER CODE BEGIN 3 */
    if (hpcd->Init.low_power_enable)
    {
      /* Reset SLEEPDEEP bit of Cortex System Control Register. */
      SCB->SCR &= (uint32_t)~((uint32_t)(SCB_SCR_SLEEPDEEP_Msk | SCB_SCR_SLEEPONEXIT_Msk));
      SystemClockConfig_Resume();
    }
    /* USER CODE END 3 */
    USBD_LL_Resume((USBD_HandleTypeDef*)hpcd->pData);
  }
  
  /**
    * @brief  ISOOUTIncomplete callback.
    * @param  hpcd: PCD handle
    * @param  epnum: Endpoint number
    * @retval None
    */
  void HAL_PCD_ISOOUTIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
  {
    USBD_LL_IsoOUTIncomplete((USBD_HandleTypeDef*)hpcd->pData, epnum);
  }
  
  /**
    * @brief  ISOINIncomplete callback.
    * @param  hpcd: PCD handle
    * @param  epnum: Endpoint number
    * @retval None
    */
  void HAL_PCD_ISOINIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
  {
    USBD_LL_IsoINIncomplete((USBD_HandleTypeDef*)hpcd->pData, epnum);
  }
  
  /**
    * @brief  Connect callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_ConnectCallback(PCD_HandleTypeDef *hpcd)
  {
    USBD_LL_DevConnected((USBD_HandleTypeDef*)hpcd->pData);
  }
  
  /**
    * @brief  Disconnect callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_DisconnectCallback(PCD_HandleTypeDef *hpcd)
  {
    USBD_LL_DevDisconnected((USBD_HandleTypeDef*)hpcd->pData);
  }
  
  /*******************************************************************************
                         LL Driver Interface (USB Device Library --> PCD)
  *******************************************************************************/
  
  /**
    * @brief  Initializes the low level portion of the device driver.
    * @param  pdev: Device handle
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_Init(USBD_HandleTypeDef *pdev)
  {
    /* Init USB Ip. */
    /* Link the driver to the stack. */
    hpcd_USB_FS.pData = pdev;
    pdev->pData = &hpcd_USB_FS;
  
    hpcd_USB_FS.Instance = USB;
    hpcd_USB_FS.Init.dev_endpoints = 8;
    hpcd_USB_FS.Init.speed = PCD_SPEED_FULL;
    hpcd_USB_FS.Init.ep0_mps = DEP0CTL_MPS_64;
    hpcd_USB_FS.Init.phy_itface = PCD_PHY_EMBEDDED;
    hpcd_USB_FS.Init.low_power_enable = DISABLE;
    hpcd_USB_FS.Init.lpm_enable = DISABLE;
    hpcd_USB_FS.Init.battery_charging_enable = DISABLE;
    if (HAL_PCD_Init(&hpcd_USB_FS) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }
  
    HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x00 , PCD_SNG_BUF, 0x18);
    HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x80 , PCD_SNG_BUF, 0x58);
    HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x81 , PCD_SNG_BUF, 0x98);
    HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x01 , PCD_SNG_BUF, 0xD8);
    return USBD_OK;
  }
  
  /**
    * @brief  De-Initializes the low level portion of the device driver.
    * @param  pdev: Device handle
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_DeInit(USBD_HandleTypeDef *pdev)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
  
    hal_status = HAL_PCD_DeInit(pdev->pData);
  
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status; 
  }
  
  /**
    * @brief  Starts the low level portion of the device driver.
    * @param  pdev: Device handle
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_Start(USBD_HandleTypeDef *pdev)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
   
    hal_status = HAL_PCD_Start(pdev->pData);
       
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status;
  }
  
  /**
    * @brief  Stops the low level portion of the device driver.
    * @param  pdev: Device handle
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_Stop(USBD_HandleTypeDef *pdev)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
  
    hal_status = HAL_PCD_Stop(pdev->pData);
  
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status;
  }
  
  /**
    * @brief  Opens an endpoint of the low level driver.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @param  ep_type: Endpoint type
    * @param  ep_mps: Endpoint max packet size
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_OpenEP(USBD_HandleTypeDef *pdev, uint8_t ep_addr, uint8_t ep_type, uint16_t ep_mps)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
  
    hal_status = HAL_PCD_EP_Open(pdev->pData, ep_addr, ep_mps, ep_type);
  
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status;
  }
  
  /**
    * @brief  Closes an endpoint of the low level driver.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_CloseEP(USBD_HandleTypeDef *pdev, uint8_t ep_addr)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
    
    hal_status = HAL_PCD_EP_Close(pdev->pData, ep_addr);
        
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status;  
  }
  
  /**
    * @brief  Flushes an endpoint of the Low Level Driver.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_FlushEP(USBD_HandleTypeDef *pdev, uint8_t ep_addr)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
    
    hal_status = HAL_PCD_EP_Flush(pdev->pData, ep_addr);
        
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status;  
  }
  
  /**
    * @brief  Sets a Stall condition on an endpoint of the Low Level Driver.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_StallEP(USBD_HandleTypeDef *pdev, uint8_t ep_addr)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
    
    hal_status = HAL_PCD_EP_SetStall(pdev->pData, ep_addr);
  
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status;  
  }
  
  /**
    * @brief  Clears a Stall condition on an endpoint of the Low Level Driver.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_ClearStallEP(USBD_HandleTypeDef *pdev, uint8_t ep_addr)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
    
    hal_status = HAL_PCD_EP_ClrStall(pdev->pData, ep_addr);  
       
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status; 
  }
  
  /**
    * @brief  Returns Stall condition.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @retval Stall (1: Yes, 0: No)
    */
  uint8_t USBD_LL_IsStallEP(USBD_HandleTypeDef *pdev, uint8_t ep_addr)
  {
    PCD_HandleTypeDef *hpcd = (PCD_HandleTypeDef*) pdev->pData;
    
    if((ep_addr & 0x80) == 0x80)
    {
      return hpcd->IN_ep[ep_addr & 0x7F].is_stall; 
    }
    else
    {
      return hpcd->OUT_ep[ep_addr & 0x7F].is_stall; 
    }
  }
  
  /**
    * @brief  Assigns a USB address to the device.
    * @param  pdev: Device handle
    * @param  dev_addr: Device address
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_SetUSBAddress(USBD_HandleTypeDef *pdev, uint8_t dev_addr)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
    
    hal_status = HAL_PCD_SetAddress(pdev->pData, dev_addr);
       
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status;  
  }
  
  /**
    * @brief  Transmits data over an endpoint.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @param  pbuf: Pointer to data to be sent
    * @param  size: Data size    
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_Transmit(USBD_HandleTypeDef *pdev, uint8_t ep_addr, uint8_t *pbuf, uint16_t size)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
  
    hal_status = HAL_PCD_EP_Transmit(pdev->pData, ep_addr, pbuf, size);
       
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status;    
  }
  
  /**
    * @brief  Prepares an endpoint for reception.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @param  pbuf: Pointer to data to be received
    * @param  size: Data size
    * @retval USBD status
    */
  USBD_StatusTypeDef USBD_LL_PrepareReceive(USBD_HandleTypeDef *pdev, uint8_t ep_addr, uint8_t *pbuf, uint16_t size)
  {
    HAL_StatusTypeDef hal_status = HAL_OK;
    USBD_StatusTypeDef usb_status = USBD_OK;
  
    hal_status = HAL_PCD_EP_Receive(pdev->pData, ep_addr, pbuf, size);
       
    switch (hal_status) {
      case HAL_OK :
        usb_status = USBD_OK;
      break;
      case HAL_ERROR :
        usb_status = USBD_FAIL;
      break;
      case HAL_BUSY :
        usb_status = USBD_BUSY;
      break;
      case HAL_TIMEOUT :
        usb_status = USBD_FAIL;
      break;
      default :
        usb_status = USBD_FAIL;
      break;
    }
    return usb_status; 
  }
  
  /**
    * @brief  Returns the last transfered packet size.
    * @param  pdev: Device handle
    * @param  ep_addr: Endpoint number
    * @retval Recived Data Size
    */
  uint32_t USBD_LL_GetRxDataSize(USBD_HandleTypeDef *pdev, uint8_t ep_addr)
  {
    return HAL_PCD_EP_GetRxCount((PCD_HandleTypeDef*) pdev->pData, ep_addr);
  }
  
  /**
    * @brief  Delays routine for the USB device library.
    * @param  Delay: Delay in ms
    * @retval None
    */
  void USBD_LL_Delay(uint32_t Delay)
  {
    HAL_Delay(Delay);
  }
  
  /**
    * @brief  Static single allocation.
    * @param  size: Size of allocated memory
    * @retval None
    */
  void *USBD_static_malloc(uint32_t size)
  {
    static uint32_t mem[(sizeof(USBD_MSC_BOT_HandleTypeDef)/4)+1];/* On 32-bit boundary */
    return mem;
  }
  
  /**
    * @brief  Dummy memory free
    * @param  p: Pointer to allocated  memory address
    * @retval None
    */
  void USBD_static_free(void *p)
  {
  
  }
  
  /* USER CODE BEGIN 5 */
  /**
    * @brief  Configures system clock after wake-up from USB Resume CallBack:
    *         enable HSI, PLL and select PLL as system clock source.
    * @retval None
    */
  static void SystemClockConfig_Resume(void)
  {
    SystemClock_Config();
  }
  /* USER CODE END 5 */
  
  /**
    * @brief Software device connection
    * @param hpcd: PCD handle
    * @param state: Connection state (0: disconnected / 1: connected)
    * @retval None
    */
  void HAL_PCDEx_SetConnectionState(PCD_HandleTypeDef *hpcd, uint8_t state)
  {
    /* USER CODE BEGIN 6 */
    if (state == 1)
    {
      /* Configure Low connection state. */
  
    }
    else
    {
      /* Configure High connection state */
  
    }
    /* USER CODE END 6 */
  }
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  