Modbus-rtu/USB_DEVICE/Target/usbd_conf.c

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : Target/usbd_conf.c
  * @version        : v1.0_Cube
  * @brief          : This file implements the board support package for the USB device library
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2026 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx.h"
#include "stm32f4xx_hal.h"
#include "usbd_def.h"
#include "usbd_core.h"

#include "usbd_cdc.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_OTG_FS;
void Error_Handler(void);

/* External functions --------------------------------------------------------*/
void SystemClock_Config(void);

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
USBD_StatusTypeDef USBD_Get_USB_Status(HAL_StatusTypeDef hal_status);

/* USER CODE END PFP */

/* Private functions ---------------------------------------------------------*/

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/*******************************************************************************
                       LL Driver Callbacks (PCD -> USB Device Library)
*******************************************************************************/
/* MSP Init */

void HAL_PCD_MspInit(PCD_HandleTypeDef* pcdHandle)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(pcdHandle->Instance==USB_OTG_FS)
  {
  /* USER CODE BEGIN USB_OTG_FS_MspInit 0 */

  /* USER CODE END USB_OTG_FS_MspInit 0 */

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**USB_OTG_FS GPIO Configuration
    PA11     ------> USB_OTG_FS_DM
    PA12     ------> USB_OTG_FS_DP
    */
    GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* Peripheral clock enable */
    __HAL_RCC_USB_OTG_FS_CLK_ENABLE();

    /* Peripheral interrupt init */
    /* Motion timers run at priorities 1/2.  USB is intentionally lower so a
       burst of CDC traffic cannot delay pulse generation or the 10 kHz
       control ISR; it remains above the USART/DMA communication IRQs (5). */
    HAL_NVIC_SetPriority(OTG_FS_IRQn, 4, 0);
    HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
  /* 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
    PA11     ------> USB_OTG_FS_DM
    PA12     ------> USB_OTG_FS_DP
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_11|GPIO_PIN_12);

    /* 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
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_SetupStageCallback(PCD_HandleTypeDef *hpcd)
#else
void HAL_PCD_SetupStageCallback(PCD_HandleTypeDef *hpcd)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  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
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_DataOutStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
#else
void HAL_PCD_DataOutStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  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
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_DataInStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
#else
void HAL_PCD_DataInStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  USBD_LL_DataInStage((USBD_HandleTypeDef*)hpcd->pData, epnum, hpcd->IN_ep[epnum].xfer_buff);
}

/**
  * @brief  SOF callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_SOFCallback(PCD_HandleTypeDef *hpcd)
#else
void HAL_PCD_SOFCallback(PCD_HandleTypeDef *hpcd)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  USBD_LL_SOF((USBD_HandleTypeDef*)hpcd->pData);
}

/**
  * @brief  Reset callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_ResetCallback(PCD_HandleTypeDef *hpcd)
#else
void HAL_PCD_ResetCallback(PCD_HandleTypeDef *hpcd)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  USBD_SpeedTypeDef speed = USBD_SPEED_FULL;

  if ( hpcd->Init.speed == PCD_SPEED_HIGH)
  {
    speed = USBD_SPEED_HIGH;
  }
  else if ( hpcd->Init.speed == PCD_SPEED_FULL)
  {
    speed = USBD_SPEED_FULL;
  }
  else
  {
    Error_Handler();
  }
    /* Set Speed. */
  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
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_SuspendCallback(PCD_HandleTypeDef *hpcd)
#else
void HAL_PCD_SuspendCallback(PCD_HandleTypeDef *hpcd)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  /* Inform USB library that core enters in suspend Mode. */
  USBD_LL_Suspend((USBD_HandleTypeDef*)hpcd->pData);
  __HAL_PCD_GATE_PHYCLOCK(hpcd);
  /* 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
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_ResumeCallback(PCD_HandleTypeDef *hpcd)
#else
void HAL_PCD_ResumeCallback(PCD_HandleTypeDef *hpcd)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  /* 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
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_ISOOUTIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
#else
void HAL_PCD_ISOOUTIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  USBD_LL_IsoOUTIncomplete((USBD_HandleTypeDef*)hpcd->pData, epnum);
}

/**
  * @brief  ISOINIncomplete callback.
  * @param  hpcd: PCD handle
  * @param  epnum: Endpoint number
  * @retval None
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_ISOINIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
#else
void HAL_PCD_ISOINIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  USBD_LL_IsoINIncomplete((USBD_HandleTypeDef*)hpcd->pData, epnum);
}

/**
  * @brief  Connect callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_ConnectCallback(PCD_HandleTypeDef *hpcd)
#else
void HAL_PCD_ConnectCallback(PCD_HandleTypeDef *hpcd)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  USBD_LL_DevConnected((USBD_HandleTypeDef*)hpcd->pData);
}

/**
  * @brief  Disconnect callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
static void PCD_DisconnectCallback(PCD_HandleTypeDef *hpcd)
#else
void HAL_PCD_DisconnectCallback(PCD_HandleTypeDef *hpcd)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
  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.dma_enable = DISABLE;
  hpcd_USB_OTG_FS.Init.phy_itface = PCD_PHY_EMBEDDED;
  hpcd_USB_OTG_FS.Init.Sof_enable = DISABLE;
  hpcd_USB_OTG_FS.Init.low_power_enable = DISABLE;
  hpcd_USB_OTG_FS.Init.lpm_enable = DISABLE;
  hpcd_USB_OTG_FS.Init.vbus_sensing_enable = DISABLE;
  hpcd_USB_OTG_FS.Init.use_dedicated_ep1 = DISABLE;
  if (HAL_PCD_Init(&hpcd_USB_OTG_FS) != HAL_OK)
  {
    Error_Handler( );
  }

#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
  /* Register USB PCD CallBacks */
  HAL_PCD_RegisterCallback(&hpcd_USB_OTG_FS, HAL_PCD_SOF_CB_ID, PCD_SOFCallback);
  HAL_PCD_RegisterCallback(&hpcd_USB_OTG_FS, HAL_PCD_SETUPSTAGE_CB_ID, PCD_SetupStageCallback);
  HAL_PCD_RegisterCallback(&hpcd_USB_OTG_FS, HAL_PCD_RESET_CB_ID, PCD_ResetCallback);
  HAL_PCD_RegisterCallback(&hpcd_USB_OTG_FS, HAL_PCD_SUSPEND_CB_ID, PCD_SuspendCallback);
  HAL_PCD_RegisterCallback(&hpcd_USB_OTG_FS, HAL_PCD_RESUME_CB_ID, PCD_ResumeCallback);
  HAL_PCD_RegisterCallback(&hpcd_USB_OTG_FS, HAL_PCD_CONNECT_CB_ID, PCD_ConnectCallback);
  HAL_PCD_RegisterCallback(&hpcd_USB_OTG_FS, HAL_PCD_DISCONNECT_CB_ID, PCD_DisconnectCallback);

  HAL_PCD_RegisterDataOutStageCallback(&hpcd_USB_OTG_FS, PCD_DataOutStageCallback);
  HAL_PCD_RegisterDataInStageCallback(&hpcd_USB_OTG_FS, PCD_DataInStageCallback);
  HAL_PCD_RegisterIsoOutIncpltCallback(&hpcd_USB_OTG_FS, PCD_ISOOUTIncompleteCallback);
  HAL_PCD_RegisterIsoInIncpltCallback(&hpcd_USB_OTG_FS, PCD_ISOINIncompleteCallback);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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, uint32_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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  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, uint32_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);

  usb_status =  USBD_Get_USB_Status(hal_status);

  return usb_status;
}

/**
  * @brief  Returns the last transferred packet size.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint number
  * @retval Received 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);
}

#ifdef USBD_HS_TESTMODE_ENABLE
/**
  * @brief  Set High speed Test mode.
  * @param  pdev: Device handle
  * @param  testmode: test mode
  * @retval USBD Status
  */
USBD_StatusTypeDef USBD_LL_SetTestMode(USBD_HandleTypeDef *pdev, uint8_t testmode)
{
  UNUSED(pdev);
  UNUSED(testmode);

  return USBD_OK;
}
#endif /* USBD_HS_TESTMODE_ENABLE */

/**
  * @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  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  Returns the USB status depending on the HAL status:
  * @param  hal_status: HAL status
  * @retval USB status
  */
USBD_StatusTypeDef USBD_Get_USB_Status(HAL_StatusTypeDef hal_status)
{
  USBD_StatusTypeDef usb_status = USBD_OK;

  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;
}