/**
  ******************************************************************************
  * @file           : usbd_conf.c
  * @brief          : This file implements the board support package for the USB device library
  ******************************************************************************
  *
  * Copyright (c) 2017 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 "stm32l4xx.h"
#include "stm32l4xx_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);

/* Exported function prototypes -----------------------------------------------*/
extern USBD_StatusTypeDef USBD_LL_BatteryCharging(USBD_HandleTypeDef *pdev);
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
static void SystemClockConfig_Resume(void);
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)
{
  GPIO_InitTypeDef GPIO_InitStruct;
  if(pcdHandle->Instance==USB_OTG_FS)
  {
    /* 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();

    /* Enable VDDUSB */
    if(__HAL_RCC_PWR_IS_CLK_DISABLED())
    {
      __HAL_RCC_PWR_CLK_ENABLE();
      HAL_PWREx_EnableVddUSB();
      __HAL_RCC_PWR_CLK_DISABLE();
    }
    else
    {
      HAL_PWREx_EnableVddUSB();
    }

    /* Peripheral interrupt init */
    HAL_NVIC_SetPriority(OTG_FS_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
  }
}

void HAL_PCD_MspDeInit(PCD_HandleTypeDef* pcdHandle)
{
  if(pcdHandle->Instance==USB_OTG_FS)
  {
    /* Peripheral clock disable */
    __HAL_RCC_USB_OTG_FS_CLK_DISABLE();

    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_11|GPIO_PIN_12);

    /* Disable VDDUSB */
    if(__HAL_RCC_PWR_IS_CLK_DISABLED())
    {
      __HAL_RCC_PWR_CLK_ENABLE();
      HAL_PWREx_DisableVddUSB();
      __HAL_RCC_PWR_CLK_DISABLE();
    }
    else
    {
      HAL_PWREx_DisableVddUSB();
    }

    /* Peripheral interrupt Deinit */
    HAL_NVIC_DisableIRQ(OTG_FS_IRQn);
  }
}

/**
  * @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)
{
  __HAL_PCD_GATE_PHYCLOCK(hpcd);
  /* Inform USB library that core enters in suspend Mode */
  USBD_LL_Suspend((USBD_HandleTypeDef*)hpcd->pData);
  /* Enter in STOP mode */
  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));
  }
}

/**
  * @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)
{
  __HAL_PCD_UNGATE_PHYCLOCK(hpcd);
  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();
  }  
  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) {
  /* enable USB power on Pwrctrl CR2 register */
  /* 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 = 6;
  hpcd_USB_OTG_FS.Init.speed = PCD_SPEED_FULL;
  hpcd_USB_OTG_FS.Init.ep0_mps = DEP0CTL_MPS_64;
  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.battery_charging_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  GPIO EXTI Callback function
  *         Handle USB VBUS detection upon External interrupt
  * @param  GPIO_Pin
  * @retval None
  */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
  if (GPIO_Pin == GPIO_PIN_9)
  {  
    HAL_PCDEx_BCD_VBUSDetect (&hpcd_USB_OTG_FS);
  }
}

#if (USBD_LPM_ENABLED == 1)
/**
  * @brief  HAL_PCDEx_LPM_Callback : Send LPM message to user layer
  * @param  hpcd: PCD handle
  * @param  msg: LPM message
  * @retval HAL status
  */
void HAL_PCDEx_LPM_Callback(PCD_HandleTypeDef *hpcd, PCD_LPM_MsgTypeDef msg)
{
  switch ( msg)
  {
  case PCD_LPM_L0_ACTIVE:
    if (hpcd->Init.low_power_enable)
    {
      SystemClock_Config();
      
      /* Reset SLEEPDEEP bit of Cortex System Control Register */
      SCB->SCR &= (uint32_t)~((uint32_t)(SCB_SCR_SLEEPDEEP_Msk | SCB_SCR_SLEEPONEXIT_Msk));
    }
    __HAL_PCD_UNGATE_PHYCLOCK(hpcd);
    USBD_LL_Resume(hpcd->pData);    
    break;
    
  case PCD_LPM_L1_ACTIVE:
    __HAL_PCD_GATE_PHYCLOCK(hpcd);
    USBD_LL_Suspend(hpcd->pData);
    
    /*Enter in STOP mode */
    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));
    }     
    break;   
  }
}
#endif
/**
  * @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  Configures system clock after wake-up from USB Resume CallBack: 
  *         enable HSI, PLL and select PLL as system clock source.
  * @param  None
  * @retval None
  */
static void SystemClockConfig_Resume(void)
{
  SystemClock_Config();
}

/**
* @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)
{
  if (state == 1)
  {
    /* Configure Low Connection State */
	
  }
  else
  {
    /* Configure High Connection State */
   
  }
}

/**
  * @brief  Verify if the Battery Charging Detection mode (BCD) is used :
  *         return USBD_OK if true
  *         else return USBD_FAIL if false
  * @param  pdev: Device handle
  * @retval USBD Status
  */
USBD_StatusTypeDef USBD_LL_BatteryCharging(USBD_HandleTypeDef *pdev)
{
  PCD_HandleTypeDef *hpcd = (PCD_HandleTypeDef*)pdev->pData;
  if (hpcd->Init.battery_charging_enable == ENABLE) 
  {
    return USBD_OK;
  }
  else
  {
    return USBD_FAIL;
  }
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
