text: /**
    ******************************************************************************
    * @file           : usbd_conf.c
    * @version        : v1.0_Cube
    * @brief          : This file implements the board support package for the USB device library
    ******************************************************************************
    *
    * Copyright (c) 2019 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 "stm32f1xx.h"
  #include "stm32f1xx_hal.h"
  #include "usbd_def.h"
  #include "usbd_core.h"
  #include "usbd_cdc.h"
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  PCD_HandleTypeDef hpcd_USB_OTG_FS;
  void Error_Handler(void);
  
  /* USER CODE BEGIN 0 */
  /* USER CODE END 0 */
  
  /* Private function prototypes -----------------------------------------------*/
  /* Private functions ---------------------------------------------------------*/
  /* USER CODE BEGIN 1 */
  /* USER CODE END 1 */
  void HAL_PCDEx_SetConnectionState(PCD_HandleTypeDef *hpcd, uint8_t state);
  
  /*******************************************************************************
                         LL Driver Callbacks (PCD -> USB Device Library)
  *******************************************************************************/
  /* MSP Init */
  
  void HAL_PCD_MspInit(PCD_HandleTypeDef* pcdHandle)
  {
    GPIO_InitTypeDef GPIO_InitStruct;
    if(pcdHandle->Instance==USB_OTG_FS)
    {
    /* USER CODE BEGIN USB_OTG_FS_MspInit 0 */
  
    /* USER CODE END USB_OTG_FS_MspInit 0 */
    
      /**USB_OTG_FS GPIO Configuration    
      PA9     ------> USB_OTG_FS_VBUS 
      */
      GPIO_InitStruct.Pin = USB_VBUS_Pin;
      GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
      GPIO_InitStruct.Pull = GPIO_NOPULL;
      HAL_GPIO_Init(USB_VBUS_GPIO_Port, &GPIO_InitStruct);
  
      /* Peripheral clock enable */
      __HAL_RCC_USB_OTG_FS_CLK_ENABLE();
  
      /* Peripheral interrupt init */
    /* USER CODE BEGIN USB_OTG_FS_MspInit 1 */
  
    /* USER CODE END USB_OTG_FS_MspInit 1 */
    }
  }
  
  void HAL_PCD_MspDeInit(PCD_HandleTypeDef* pcdHandle)
  {
    if(pcdHandle->Instance==USB_OTG_FS)
    {
    /* USER CODE BEGIN USB_OTG_FS_MspDeInit 0 */
  
    /* USER CODE END USB_OTG_FS_MspDeInit 0 */
      /* Peripheral clock disable */
      __HAL_RCC_USB_OTG_FS_CLK_DISABLE();
    
      /**USB_OTG_FS GPIO Configuration    
      PA9     ------> USB_OTG_FS_VBUS 
      */
      HAL_GPIO_DeInit(USB_VBUS_GPIO_Port, USB_VBUS_Pin);
  
      /* Peripheral interrupt Deinit*/
      HAL_NVIC_DisableIRQ(OTG_FS_IRQn);
  
    /* USER CODE BEGIN USB_OTG_FS_MspDeInit 1 */
  
    /* USER CODE END USB_OTG_FS_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_HIGH:
      speed = USBD_SPEED_HIGH;
      break;
    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 */  
    __HAL_PCD_GATE_PHYCLOCK(hpcd);
    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 */
    /* 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  ConnectCallback 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 */
    if (pdev->id == DEVICE_FS) {
    /* Link The driver to the stack */	
    hpcd_USB_OTG_FS.pData = pdev;
    pdev->pData = &hpcd_USB_OTG_FS;
    
    hpcd_USB_OTG_FS.Instance = USB_OTG_FS;
    hpcd_USB_OTG_FS.Init.dev_endpoints = 4;
    hpcd_USB_OTG_FS.Init.speed = PCD_SPEED_FULL;
    hpcd_USB_OTG_FS.Init.ep0_mps = DEP0CTL_MPS_64;
    hpcd_USB_OTG_FS.Init.Sof_enable = DISABLE;
    hpcd_USB_OTG_FS.Init.low_power_enable = DISABLE;
    hpcd_USB_OTG_FS.Init.vbus_sensing_enable = DISABLE;
    if (HAL_PCD_Init(&hpcd_USB_OTG_FS) != HAL_OK)
    {
      Error_Handler();
    }
  
    HAL_PCDEx_SetRxFiFo(&hpcd_USB_OTG_FS, 0x80);
    HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 0, 0x40);
    HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_FS, 1, 0x80);
    }
    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  ep_addr: Endpoint Number
    * @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_CDC_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)
  {
  
  }
  
  /**
  * @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 5 */
    if (state == 1)
    {
      /* Configure Low Connection State */
  	
    }
    else
    {
      /* Configure High Connection State */
     
    } 
  /* USER CODE END 5 */
  }
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  