/**
  ******************************************************************************
  * @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) 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 <utils/malloc_safe.h>
#include "platform.h"
#include "usbd_def.h"
#include "usbd_core.h"
#include "usbd_msc.h"
#include "usbd_cdc.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
extern PCD_HandleTypeDef hpcd_USB_FS;

/* 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)
{
#if defined(USB)
  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 */
#if defined(GEX_PLAT_F103_BLUEPILL)
    HAL_NVIC_SetPriority(USB_LP_CAN1_RX0_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
#elif defined(GEX_PLAT_F072_DISCOVERY)
    HAL_NVIC_SetPriority(USB_IRQn, 3, 0);
    HAL_NVIC_EnableIRQ(USB_IRQn);
#elif defined(GEX_PLAT_F303_DISCOVERY)
    // Pins need to be configured here

    /**USB GPIO Configuration
    PA11     ------> USB_DM
    PA12     ------> USB_DP
    */
    __HAL_RCC_GPIOA_CLK_ENABLE();
    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_11, LL_GPIO_MODE_ALTERNATE);
    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_12, LL_GPIO_MODE_ALTERNATE);
    LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_11, LL_GPIO_AF_14);
    LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_12, LL_GPIO_AF_14);
    HAL_NVIC_SetPriority(USB_LP_CAN_RX0_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(USB_LP_CAN_RX0_IRQn);
#else
  #error "BAD PLATFORM"
#endif
  /* USER CODE BEGIN USB_MspInit 1 */

  /* USER CODE END USB_MspInit 1 */
  }
#elif defined(USB_OTG_FS)
  // This is for F407 with USB OTG peripheral
  if (pcdHandle->Instance==USB_OTG_FS) {
    /**USB_OTG_FS GPIO Configuration
      PA11     ------> USB_OTG_FS_DM
      PA12     ------> USB_OTG_FS_DP
      */
    __HAL_RCC_GPIOA_CLK_ENABLE();

    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_11, LL_GPIO_MODE_ALTERNATE);
    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_12, LL_GPIO_MODE_ALTERNATE);
    LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_11, LL_GPIO_AF_10);
    LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_12, LL_GPIO_AF_10);

    /* Peripheral clock enable */
    __HAL_RCC_USB_OTG_FS_CLK_ENABLE();

    /* Peripheral interrupt init */
    HAL_NVIC_SetPriority(OTG_FS_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
  }
#else
  #error "BAD USB!"
#endif
}

void HAL_PCD_MspDeInit(PCD_HandleTypeDef* pcdHandle)
{
#if defined(USB)
  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*/
#if defined(GEX_PLAT_F103_BLUEPILL)
    HAL_NVIC_DisableIRQ(USB_LP_CAN1_RX0_IRQn);
#elif defined(GEX_PLAT_F072_DISCOVERY)
    HAL_NVIC_DisableIRQ(USB_IRQn);
#elif defined(GEX_PLAT_F303_DISCOVERY)
    HAL_NVIC_DisableIRQ(USB_LP_CAN_RX0_IRQn);
#else
  #error "BAD PLATFORM"
#endif

  /* USER CODE BEGIN USB_MspDeInit 1 */

  /* USER CODE END USB_MspDeInit 1 */
  }
#elif defined(USB_OTG_FS)
  // This is for F407 with USB OTG peripheral
  if (pcdHandle->Instance==USB_OTG_FS) {
    __HAL_RCC_USB_OTG_FS_CLK_DISABLE();

    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_11, LL_GPIO_MODE_ANALOG);
    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_12, LL_GPIO_MODE_ANALOG);

    /* Peripheral interrupt init */
    HAL_NVIC_DisableIRQ(OTG_FS_IRQn);
  }
#else
#error "BAD USB!"
#endif
}

/**
  * @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, USBD_SPEED_FULL);
  
  /*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);

#if PLAT_USB_PHYCLOCK
  __HAL_PCD_GATE_PHYCLOCK(hpcd);
#endif

  /*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 */
  /* 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)
{
#if PLAT_USB_OTGFS
  /* Init USB_IP */
  if (pdev->id == DEVICE_FS) {
    /* Link The driver to the stack */
    hpcd_USB_FS.pData = pdev;
    pdev->pData = &hpcd_USB_FS;

    hpcd_USB_FS.Instance = USB_OTG_FS;
    hpcd_USB_FS.Init.dev_endpoints = 4;
    hpcd_USB_FS.Init.speed = PCD_SPEED_FULL;
    hpcd_USB_FS.Init.dma_enable = DISABLE;
    hpcd_USB_FS.Init.ep0_mps = DEP0CTL_MPS_8;
    hpcd_USB_FS.Init.phy_itface = PCD_PHY_EMBEDDED;
    hpcd_USB_FS.Init.Sof_enable = DISABLE;
    hpcd_USB_FS.Init.low_power_enable = DISABLE;
    hpcd_USB_FS.Init.lpm_enable = DISABLE;
    hpcd_USB_FS.Init.vbus_sensing_enable = DISABLE;
    hpcd_USB_FS.Init.use_dedicated_ep1 = DISABLE;
    if (HAL_PCD_Init(&hpcd_USB_FS) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }

    // FIXME this is likely wrong
    HAL_PCDEx_SetRxFiFo(&hpcd_USB_FS, 0x80);

    HAL_PCDEx_SetTxFiFo(&hpcd_USB_FS, 0, 0x40); // EP0
    HAL_PCDEx_SetTxFiFo(&hpcd_USB_FS, MSC_EPOUT_ADDR, 0x40);
    HAL_PCDEx_SetTxFiFo(&hpcd_USB_FS, CDC_OUT_EP, 0x40);
    // EP 3 is Rx only
  }
#else
  /* 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_8; // could be 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__);
  }

  uint32_t ptr = 0;
  const int TOTAL_EPS = (USBD_NUM_ENDPOINTS*2+1);
  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x00 , PCD_SNG_BUF, ptr = TOTAL_EPS*8); // 64
  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x80 , PCD_SNG_BUF, ptr += 64); // 64

  // MSC endpoints - EP1, two-way
  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , MSC_EPIN_ADDR , PCD_SNG_BUF, ptr += 64); // 64
  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , MSC_EPOUT_ADDR , PCD_SNG_BUF, ptr += 64); // 64

  // CDC endpoints, EP2 two-way and EP3 in-only
    uint32_t buf1addr, buf2addr;

    buf1addr = (ptr += 64);
    buf2addr = (ptr += 64);
  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CDC_IN_EP , PCD_DBL_BUF, buf1addr | (buf2addr << 16)); // 64

    buf1addr = (ptr += 64);
    buf2addr = (ptr += 64);
  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CDC_OUT_EP , PCD_DBL_BUF, buf1addr | (buf2addr << 16)); // 64

  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CDC_CMD_EP , PCD_SNG_BUF, ptr += 16); // 16
  (void)ptr;
#endif

  return USBD_OK;
}

#define HAL_TO_USB_STATUS(hal) ((hal)==HAL_OK?USBD_OK:(hal)==HAL_BUSY?USBD_BUSY:USBD_FAIL)

/**
  * @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_PCD_DeInit(pdev->pData);
  return HAL_TO_USB_STATUS(hal_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_PCD_Start(pdev->pData);
  return HAL_TO_USB_STATUS(hal_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_PCD_Stop(pdev->pData);
  return HAL_TO_USB_STATUS(hal_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_PCD_EP_Open(pdev->pData,
                               ep_addr, 
                               ep_mps, 
                               ep_type);

  return HAL_TO_USB_STATUS(hal_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)   
{
  //trap("CloseEP noimpl"); // XXX This uses ~ 500 bytes, maybe could be disabled
  HAL_StatusTypeDef hal_status = HAL_PCD_EP_Close(pdev->pData, ep_addr);
  return HAL_TO_USB_STATUS(hal_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_PCD_EP_Flush(pdev->pData, ep_addr);
  return HAL_TO_USB_STATUS(hal_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_PCD_EP_SetStall(pdev->pData, ep_addr);
  return HAL_TO_USB_STATUS(hal_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_PCD_EP_ClrStall(pdev->pData, ep_addr);
  return HAL_TO_USB_STATUS(hal_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_PCD_SetAddress(pdev->pData, dev_addr);
  return HAL_TO_USB_STATUS(hal_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_PCD_EP_Transmit(pdev->pData, ep_addr, pbuf, size);
  return HAL_TO_USB_STATUS(hal_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_PCD_EP_Receive(pdev->pData, ep_addr, pbuf, size);
  return HAL_TO_USB_STATUS(hal_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);
}

#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)
{
    return malloc_ck(size);
}

/**
  * @brief  Dummy memory free
  * @param  *p pointer to allocated  memory address
  * @retval None
  */
void USBD_static_free(void *p)
{
    free_ck(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 */
}

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