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/**

  ******************************************************************************

  * @file    stm32f1xx_hal_hcd.c

  * @author  MCD Application Team

  * @version V1.0.4

  * @date    29-April-2016

  * @brief   HCD HAL module driver.

  *          This file provides firmware functions to manage the following

  *          functionalities of the USB Peripheral Controller:

  *           + Initialization and de-initialization functions

  *           + IO operation functions

  *           + Peripheral Control functions

  *           + Peripheral State functions

  *

  @verbatim

  ==============================================================================

                    ##### How to use this driver #####

  ==============================================================================

  [..]

    (#)Declare a HCD_HandleTypeDef handle structure, for example:

       HCD_HandleTypeDef  hhcd;

    (#)Fill parameters of Init structure in HCD handle

    (#)Call HAL_HCD_Init() API to initialize the HCD peripheral (Core, Host core, ...)

    (#)Initialize the HCD low level resources through the HAL_HCD_MspInit() API:

        (##) Enable the HCD/USB Low Level interface clock using the following macro

             (+++) __HAL_RCC_USB_OTG_FS_CLK_ENABLE()

        (##) Initialize the related GPIO clocks

        (##) Configure HCD pin-out

        (##) Configure HCD NVIC interrupt

    (#)Associate the Upper USB Host stack to the HAL HCD Driver:

        (##) hhcd.pData = phost;

    (#)Enable HCD transmission and reception:

        (##) HAL_HCD_Start();

  @endverbatim

  ******************************************************************************

  * @attention

  *

  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>

  *

  * Redistribution and use in source and binary forms, with or without modification,

  * are permitted provided that the following conditions are met:

  *   1. Redistributions 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 its contributors

  *      may be used to endorse or promote products derived from this software

  *      without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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_hal.h"

/** @addtogroup STM32F1xx_HAL_Driver

  * @{

  */

#ifdef HAL_HCD_MODULE_ENABLED

#if defined(STM32F105xC) || defined(STM32F107xC)

/** @defgroup HCD HCD

  * @brief HCD HAL module driver

  * @{

  */

/* Private types -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* Private constants ---------------------------------------------------------*/

/* Private macros ------------------------------------------------------------*/

/* Private function ----------------------------------------------------------*/

/** @defgroup HCD_Private_Functions HCD Private Functions

  * @{

  */

static void HCD_HC_IN_IRQHandler(HCD_HandleTypeDef *hhcd, uint8_t chnum);

static void HCD_HC_OUT_IRQHandler(HCD_HandleTypeDef *hhcd, uint8_t chnum);

static void HCD_RXQLVL_IRQHandler(HCD_HandleTypeDef *hhcd);

static void HCD_Port_IRQHandler(HCD_HandleTypeDef *hhcd);

/**

  * @}

  */

/* Exported functions --------------------------------------------------------*/

/** @defgroup HCD_Exported_Functions HCD Exported Functions

  * @{

  */

/** @defgroup HCD_Exported_Functions_Group1 Initialization and de-initialization functions

 *  @brief    Initialization and Configuration functions

 *

@verbatim

 ===============================================================================

          ##### Initialization and de-initialization functions #####

 ===============================================================================

    [..]  This section provides functions allowing to:

@endverbatim

  * @{

  */

/**

  * @brief  Initialize the host driver

  * @param  hhcd: HCD handle

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_HCD_Init(HCD_HandleTypeDef *hhcd)

{

  /* Check the HCD handle allocation */

  if(hhcd == NULL)

  {

    return HAL_ERROR;

  }

  /* Check the parameters */

  assert_param(IS_HCD_ALL_INSTANCE(hhcd->Instance));

  if(hhcd->State == HAL_HCD_STATE_RESET)

  {  

    /* Allocate lock resource and initialize it */

    hhcd->Lock = HAL_UNLOCKED;

    /* Init the low level hardware : GPIO, CLOCK, NVIC... */

    HAL_HCD_MspInit(hhcd);

  }

  hhcd->State = HAL_HCD_STATE_BUSY;

  /* Disable the Interrupts */

  __HAL_HCD_DISABLE(hhcd);

  /*Init the Core (common init.) */

  USB_CoreInit(hhcd->Instance, hhcd->Init);

  /* Force Host Mode*/

  USB_SetCurrentMode(hhcd->Instance , USB_HOST_MODE);

  /* Init Host */

  USB_HostInit(hhcd->Instance, hhcd->Init);

  hhcd->State= HAL_HCD_STATE_READY;

  return HAL_OK;

}

/**

  * @brief  Initialize a host channel

  * @param  hhcd: HCD handle

  * @param  ch_num: Channel number.

  *         This parameter can be a value from 1 to 15

  * @param  epnum: Endpoint number.

  *          This parameter can be a value from 1 to 15

  * @param  dev_address : Current device address

  *          This parameter can be a value from 0 to 255

  * @param  speed: Current device speed.

  *          This parameter can be one of these values:

  *            HCD_SPEED_FULL: Full speed mode,

  *            HCD_SPEED_LOW: Low speed mode

  * @param  ep_type: Endpoint Type.

  *          This parameter can be one of these values:

  *            EP_TYPE_CTRL: Control type,

  *            EP_TYPE_ISOC: Isochronous type,

  *            EP_TYPE_BULK: Bulk type,

  *            EP_TYPE_INTR: Interrupt type

  * @param  mps: Max Packet Size.

  *          This parameter can be a value from 0 to32K

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_HCD_HC_Init(HCD_HandleTypeDef *hhcd,

                                  uint8_t ch_num,

                                  uint8_t epnum,

                                  uint8_t dev_address,

                                  uint8_t speed,

                                  uint8_t ep_type,

                                  uint16_t mps)

{

  HAL_StatusTypeDef status = HAL_OK;

  __HAL_LOCK(hhcd);

  hhcd->hc[ch_num].dev_addr = dev_address;

  hhcd->hc[ch_num].max_packet = mps;

  hhcd->hc[ch_num].ch_num = ch_num;

  hhcd->hc[ch_num].ep_type = ep_type;

  hhcd->hc[ch_num].ep_num = epnum & 0x7F;

  hhcd->hc[ch_num].ep_is_in = ((epnum & 0x80) == 0x80);

  hhcd->hc[ch_num].speed = speed;

  status =  USB_HC_Init(hhcd->Instance,

                        ch_num,

                        epnum,

                        dev_address,

                        speed,

                        ep_type,

                        mps);

  __HAL_UNLOCK(hhcd);

  return status;

}

/**

  * @brief  Halt a host channel

  * @param  hhcd: HCD handle

  * @param  ch_num: Channel number.

  *         This parameter can be a value from 1 to 15

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_HCD_HC_Halt(HCD_HandleTypeDef *hhcd,

                                  uint8_t ch_num)

{

  __HAL_LOCK(hhcd);

  USB_HC_Halt(hhcd->Instance, ch_num);

  __HAL_UNLOCK(hhcd);

  return HAL_OK;

}

/**

  * @brief  DeInitialize the host driver

  * @param  hhcd: HCD handle

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_HCD_DeInit(HCD_HandleTypeDef *hhcd)

{

  /* Check the HCD handle allocation */

  if(hhcd == NULL)

  {

    return HAL_ERROR;

  }

  hhcd->State = HAL_HCD_STATE_BUSY;

  /* DeInit the low level hardware */

  HAL_HCD_MspDeInit(hhcd);

   __HAL_HCD_DISABLE(hhcd);

  hhcd->State = HAL_HCD_STATE_RESET;

  return HAL_OK;

}

/**

  * @brief  Initializes the HCD MSP.

  * @param  hhcd: HCD handle

  * @retval None

  */

__weak void  HAL_HCD_MspInit(HCD_HandleTypeDef *hhcd)

{

  /* Prevent unused argument(s) compilation warning */

  UNUSED(hhcd);

  /* NOTE : This function Should not be modified, when the callback is needed,

            the HAL_HCD_MspInit could be implemented in the user file

   */

}

/**

  * @brief  DeInitializes HCD MSP.

  * @param  hhcd: HCD handle

  * @retval None

  */

__weak void  HAL_HCD_MspDeInit(HCD_HandleTypeDef *hhcd)

{

  /* Prevent unused argument(s) compilation warning */

  UNUSED(hhcd);

  /* NOTE : This function Should not be modified, when the callback is needed,

            the HAL_HCD_MspDeInit could be implemented in the user file

   */

}

/**

  * @}

  */

/** @defgroup HCD_Exported_Functions_Group2 IO operation functions

  *  @brief   HCD IO operation functions

  *

@verbatim

 ===============================================================================

                      ##### IO operation functions #####

 ===============================================================================

    This subsection provides a set of functions allowing to manage the USB Host Data

    Transfer

@endverbatim

  * @{

  */

/**                                

  * @brief  Submit a new URB for processing

  * @param  hhcd: HCD handle

  * @param  ch_num: Channel number.

  *         This parameter can be a value from 1 to 15

  * @param  direction: Channel number.

  *          This parameter can be one of these values:

  *           0 : Output / 1 : Input

  * @param  ep_type: Endpoint Type.

  *          This parameter can be one of these values:

  *            EP_TYPE_CTRL: Control type/

  *            EP_TYPE_ISOC: Isochronous type/

  *            EP_TYPE_BULK: Bulk type/

  *            EP_TYPE_INTR: Interrupt type/

  * @param  token: Endpoint Type.

  *          This parameter can be one of these values:

  *            0: HC_PID_SETUP / 1: HC_PID_DATA1

  * @param  pbuff: pointer to URB data

  * @param  length: Length of URB data

  * @param  do_ping: activate do ping protocol (for high speed only).

  *          This parameter can be one of these values:

  *           0 : do ping inactive / 1 : do ping active

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_HCD_HC_SubmitRequest(HCD_HandleTypeDef *hhcd,

                                           uint8_t ch_num,

                                           uint8_t direction ,

                                           uint8_t ep_type,  

                                           uint8_t token,

                                           uint8_t* pbuff,

                                           uint16_t length,

                                           uint8_t do_ping)

{

  hhcd->hc[ch_num].ep_is_in = direction;

  hhcd->hc[ch_num].ep_type  = ep_type;

  if(token == 0)

  {

    hhcd->hc[ch_num].data_pid = HC_PID_SETUP;

  }

  else

  {

    hhcd->hc[ch_num].data_pid = HC_PID_DATA1;

  }

  /* Manage Data Toggle */

  switch(ep_type)

  {

  case EP_TYPE_CTRL:

    if((token == 1) && (direction == 0)) /*send data */

    {

      if ( length == 0 )

      { /* For Status OUT stage, Length==0, Status Out PID = 1 */

        hhcd->hc[ch_num].toggle_out = 1;

      }

      /* Set the Data Toggle bit as per the Flag */

      if ( hhcd->hc[ch_num].toggle_out == 0)

      { /* Put the PID 0 */

        hhcd->hc[ch_num].data_pid = HC_PID_DATA0;

      }

      else

      { /* Put the PID 1 */

        hhcd->hc[ch_num].data_pid = HC_PID_DATA1 ;

      }

      if(hhcd->hc[ch_num].urb_state  != URB_NOTREADY)

      {

        hhcd->hc[ch_num].do_ping = do_ping;

      }

    }

    break;

  case EP_TYPE_BULK:

    if(direction == 0)

    {

      /* Set the Data Toggle bit as per the Flag */

      if ( hhcd->hc[ch_num].toggle_out == 0)

      { /* Put the PID 0 */

        hhcd->hc[ch_num].data_pid = HC_PID_DATA0;

      }

      else

      { /* Put the PID 1 */

        hhcd->hc[ch_num].data_pid = HC_PID_DATA1 ;

      }

      if(hhcd->hc[ch_num].urb_state  != URB_NOTREADY)

      {

        hhcd->hc[ch_num].do_ping = do_ping;

      }

    }

    else

    {

      if( hhcd->hc[ch_num].toggle_in == 0)

      {

        hhcd->hc[ch_num].data_pid = HC_PID_DATA0;

      }

      else

      {

        hhcd->hc[ch_num].data_pid = HC_PID_DATA1;

      }

    }

    break;

  case EP_TYPE_INTR:

    if(direction == 0)

    {

      /* Set the Data Toggle bit as per the Flag */

      if ( hhcd->hc[ch_num].toggle_out == 0)

      { /* Put the PID 0 */

        hhcd->hc[ch_num].data_pid = HC_PID_DATA0;

      }

      else

      { /* Put the PID 1 */

        hhcd->hc[ch_num].data_pid = HC_PID_DATA1 ;

      }

    }

    else

    {

      if( hhcd->hc[ch_num].toggle_in == 0)

      {

        hhcd->hc[ch_num].data_pid = HC_PID_DATA0;

      }

      else

      {

        hhcd->hc[ch_num].data_pid = HC_PID_DATA1;

      }

    }

    break;

  case EP_TYPE_ISOC:

    hhcd->hc[ch_num].data_pid = HC_PID_DATA0;

    break;

  }

  hhcd->hc[ch_num].xfer_buff = pbuff;

  hhcd->hc[ch_num].xfer_len  = length;

  hhcd->hc[ch_num].urb_state =   URB_IDLE;

  hhcd->hc[ch_num].xfer_count = 0 ;

  hhcd->hc[ch_num].ch_num = ch_num;

  hhcd->hc[ch_num].state = HC_IDLE;

  return USB_HC_StartXfer(hhcd->Instance, &(hhcd->hc[ch_num]));

}

/**

  * @brief  This function handles HCD interrupt request.

  * @param  hhcd: HCD handle

  * @retval None

  */

void HAL_HCD_IRQHandler(HCD_HandleTypeDef *hhcd)

{

  USB_OTG_GlobalTypeDef *USBx = hhcd->Instance;

  uint32_t index = 0 , interrupt = 0;

  /* ensure that we are in device mode */

  if (USB_GetMode(hhcd->Instance) == USB_OTG_MODE_HOST)

  {

    /* avoid spurious interrupt */

    if(__HAL_HCD_IS_INVALID_INTERRUPT(hhcd))

    {

      return;

    }

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_PXFR_INCOMPISOOUT))

    {

     /* incorrect mode, acknowledge the interrupt */

      __HAL_HCD_CLEAR_FLAG(hhcd, USB_OTG_GINTSTS_PXFR_INCOMPISOOUT);

    }

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_IISOIXFR))

    {

     /* incorrect mode, acknowledge the interrupt */

      __HAL_HCD_CLEAR_FLAG(hhcd, USB_OTG_GINTSTS_IISOIXFR);

    }

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_PTXFE))

    {

     /* incorrect mode, acknowledge the interrupt */

      __HAL_HCD_CLEAR_FLAG(hhcd, USB_OTG_GINTSTS_PTXFE);

    }

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_MMIS))

    {

     /* incorrect mode, acknowledge the interrupt */

      __HAL_HCD_CLEAR_FLAG(hhcd, USB_OTG_GINTSTS_MMIS);

    }

    /* Handle Host Disconnect Interrupts */

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_DISCINT))

    {

      /* Cleanup HPRT */

      USBx_HPRT0 &= ~(USB_OTG_HPRT_PENA | USB_OTG_HPRT_PCDET |\

        USB_OTG_HPRT_PENCHNG | USB_OTG_HPRT_POCCHNG );

      /* Handle Host Port Interrupts */

      HAL_HCD_Disconnect_Callback(hhcd);

       USB_InitFSLSPClkSel(hhcd->Instance ,HCFG_48_MHZ );

      __HAL_HCD_CLEAR_FLAG(hhcd, USB_OTG_GINTSTS_DISCINT);

    }

    /* Handle Host Port Interrupts */

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_HPRTINT))

    {

      HCD_Port_IRQHandler (hhcd);

    }

    /* Handle Host SOF Interrupts */

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_SOF))

    {

      HAL_HCD_SOF_Callback(hhcd);

      __HAL_HCD_CLEAR_FLAG(hhcd, USB_OTG_GINTSTS_SOF);

    }

    /* Handle Host channel Interrupts */

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_HCINT))

    {

      interrupt = USB_HC_ReadInterrupt(hhcd->Instance);

      for (index = 0; index < hhcd->Init.Host_channels ; index++)

      {

        if (interrupt & (1 << index))

        {

          if ((USBx_HC(index)->HCCHAR) &  USB_OTG_HCCHAR_EPDIR)

          {

            HCD_HC_IN_IRQHandler (hhcd, index);

          }

          else

          {

            HCD_HC_OUT_IRQHandler (hhcd, index);

          }

        }

      }

      __HAL_HCD_CLEAR_FLAG(hhcd, USB_OTG_GINTSTS_HCINT);

    }

    /* Handle Rx Queue Level Interrupts */

    if(__HAL_HCD_GET_FLAG(hhcd, USB_OTG_GINTSTS_RXFLVL))

    {

      USB_MASK_INTERRUPT(hhcd->Instance, USB_OTG_GINTSTS_RXFLVL);

      HCD_RXQLVL_IRQHandler (hhcd);

      USB_UNMASK_INTERRUPT(hhcd->Instance, USB_OTG_GINTSTS_RXFLVL);

    }

  }

}

/**

  * @brief  SOF callback.

  * @param  hhcd: HCD handle

  * @retval None

  */

__weak void HAL_HCD_SOF_Callback(HCD_HandleTypeDef *hhcd)

{

  /* Prevent unused argument(s) compilation warning */

  UNUSED(hhcd);

  /* NOTE : This function Should not be modified, when the callback is needed,

            the HAL_HCD_SOF_Callback could be implemented in the user file

   */

}

/**

  * @brief Connexion Event callback.

  * @param  hhcd: HCD handle

  * @retval None

  */

__weak void HAL_HCD_Connect_Callback(HCD_HandleTypeDef *hhcd)

{

  /* Prevent unused argument(s) compilation warning */

  UNUSED(hhcd);

  /* NOTE : This function Should not be modified, when the callback is needed,

            the HAL_HCD_Connect_Callback could be implemented in the user file

   */

}

/**

  * @brief  Disonnexion Event callback.

  * @param  hhcd: HCD handle

  * @retval None

  */

__weak void HAL_HCD_Disconnect_Callback(HCD_HandleTypeDef *hhcd)

{

  /* Prevent unused argument(s) compilation warning */

  UNUSED(hhcd);

  /* NOTE : This function Should not be modified, when the callback is needed,

            the HAL_HCD_Disconnect_Callback could be implemented in the user file

   */

}

/**

  * @brief  Notify URB state change callback.

  * @param  hhcd: HCD handle

  * @param  chnum: Channel number.

  *         This parameter can be a value from 1 to 15

  * @param  urb_state:

  *          This parameter can be one of these values:

  *            URB_IDLE/

  *            URB_DONE/

  *            URB_NOTREADY/

  *            URB_NYET/

  *            URB_ERROR/  

  *            URB_STALL/    

  * @retval None

  */

__weak void HAL_HCD_HC_NotifyURBChange_Callback(HCD_HandleTypeDef *hhcd, uint8_t chnum, HCD_URBStateTypeDef urb_state)

{

  /* Prevent unused argument(s) compilation warning */

  UNUSED(hhcd);

  UNUSED(chnum);

  UNUSED(urb_state);

  /* NOTE : This function Should not be modified, when the callback is needed,

            the HAL_HCD_HC_NotifyURBChange_Callback could be implemented in the user file

   */

}

/**

  * @}

  */

/** @defgroup HCD_Exported_Functions_Group3 Peripheral Control functions

 *  @brief   management functions

 *

@verbatim

 ===============================================================================

                      ##### Peripheral Control functions #####

 ===============================================================================

    [..]

    This subsection provides a set of functions allowing to control the HCD data

    transfers.

@endverbatim

  * @{

  */

/**

  * @brief  Start the host driver

  * @param  hhcd: HCD handle

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_HCD_Start(HCD_HandleTypeDef *hhcd)

{

  __HAL_LOCK(hhcd);

  __HAL_HCD_ENABLE(hhcd);

  USB_DriveVbus(hhcd->Instance, 1);

  __HAL_UNLOCK(hhcd);

  return HAL_OK;

}

/**

  * @brief  Stop the host driver

  * @param  hhcd: HCD handle

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_HCD_Stop(HCD_HandleTypeDef *hhcd)

{

  __HAL_LOCK(hhcd);

  USB_StopHost(hhcd->Instance);

  __HAL_UNLOCK(hhcd);

  return HAL_OK;

}

/**

  * @brief  Reset the host port

  * @param  hhcd: HCD handle

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_HCD_ResetPort(HCD_HandleTypeDef *hhcd)

{

  return (USB_ResetPort(hhcd->Instance));

}

/**

  * @}

  */

/** @defgroup HCD_Exported_Functions_Group4 Peripheral State functions

 *  @brief   Peripheral State functions

 *

@verbatim

 ===============================================================================

                      ##### Peripheral State functions #####

 ===============================================================================

    [..]

    This subsection permits to get in run-time the status of the peripheral

    and the data flow.

@endverbatim

  * @{

  */

/**

  * @brief  Return the HCD state

  * @param  hhcd: HCD handle

  * @retval HAL state

  */

HCD_StateTypeDef HAL_HCD_GetState(HCD_HandleTypeDef *hhcd)

{

  return hhcd->State;

}

/**

  * @brief  Return  URB state for a channel

  * @param  hhcd: HCD handle

  * @param  chnum: Channel number.

  *         This parameter can be a value from 1 to 15

  * @retval URB state.

  *          This parameter can be one of these values:

  *            URB_IDLE/

  *            URB_DONE/

  *            URB_NOTREADY/

  *            URB_NYET/

  *            URB_ERROR/

  *            URB_STALL/

  */

HCD_URBStateTypeDef HAL_HCD_HC_GetURBState(HCD_HandleTypeDef *hhcd, uint8_t chnum)

{

  return hhcd->hc[chnum].urb_state;

}

/**

  * @brief  Return the last host transfer size

  * @param  hhcd: HCD handle

  * @param  chnum: Channel number.

  *         This parameter can be a value from 1 to 15

  * @retval last transfer size in byte

  */

uint32_t HAL_HCD_HC_GetXferCount(HCD_HandleTypeDef *hhcd, uint8_t chnum)

{

  return hhcd->hc[chnum].xfer_count;

}

/**

  * @brief  Return the Host Channel state

  * @param  hhcd: HCD handle

  * @param  chnum: Channel number.

  *         This parameter can be a value from 1 to 15

  * @retval Host channel state

  *          This parameter can be one of the these values:

  *            HC_IDLE/

  *            HC_XFRC/

  *            HC_HALTED/

  *            HC_NYET/

  *            HC_NAK/

  *            HC_STALL/

  *            HC_XACTERR/

  *            HC_BBLERR/

  *            HC_DATATGLERR/

  */

HCD_HCStateTypeDef  HAL_HCD_HC_GetState(HCD_HandleTypeDef *hhcd, uint8_t chnum)

{

  return hhcd->hc[chnum].state;

}

/**

  * @brief  Return the current Host frame number

  * @param  hhcd: HCD handle

  * @retval Current Host frame number

  */

uint32_t HAL_HCD_GetCurrentFrame(HCD_HandleTypeDef *hhcd)

{

  return (USB_GetCurrentFrame(hhcd->Instance));

}

/**

  * @brief  Return the Host enumeration speed

  * @param  hhcd: HCD handle

  * @retval Enumeration speed

  */

uint32_t HAL_HCD_GetCurrentSpeed(HCD_HandleTypeDef *hhcd)

{

  return (USB_GetHostSpeed(hhcd->Instance));

}

/**

  * @}

  */

/**

  * @}

  */

/** @addtogroup HCD_Private_Functions

  * @{

  */

/**

  * @brief  This function handles Host Channel IN interrupt requests.

  * @param  hhcd: HCD handle

  * @param  chnum: Channel number.

  *         This parameter can be a value from 1 to 15

  * @retval none

  */

static void HCD_HC_IN_IRQHandler (HCD_HandleTypeDef *hhcd, uint8_t chnum)

{

  USB_OTG_GlobalTypeDef *USBx = hhcd->Instance;

  uint32_t tmpreg = 0;

  if ((USBx_HC(chnum)->HCINT) &  USB_OTG_HCINT_AHBERR)

  {

    __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_AHBERR);

    __HAL_HCD_UNMASK_HALT_HC_INT(chnum);

  }  

  else if ((USBx_HC(chnum)->HCINT) &  USB_OTG_HCINT_ACK)

  {

    __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_ACK);

  }

  else if ((USBx_HC(chnum)->HCINT) &  USB_OTG_HCINT_STALL)

  {

    __HAL_HCD_UNMASK_HALT_HC_INT(chnum);

    hhcd->hc[chnum].state = HC_STALL;

    __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_NAK);

    __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_STALL);

    USB_HC_Halt(hhcd->Instance, chnum);

  }

  else if ((USBx_HC(chnum)->HCINT) &  USB_OTG_HCINT_DTERR)

  {

    __HAL_HCD_UNMASK_HALT_HC_INT(chnum);

    USB_HC_Halt(hhcd->Instance, chnum);

    __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_NAK);

    hhcd->hc[chnum].state = HC_DATATGLERR;

    __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_DTERR);

  }

  if ((USBx_HC(chnum)->HCINT) &  USB_OTG_HCINT_FRMOR)

  {

    __HAL_HCD_UNMASK_HALT_HC_INT(chnum);

    USB_HC_Halt(hhcd->Instance, chnum);

    __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_FRMOR);

  }

  else if ((USBx_HC(chnum)->HCINT) &  USB_OTG_HCINT_XFRC)

  {

    hhcd->hc[chnum].state = HC_XFRC;

    hhcd->hc[chnum].ErrCnt = 0;

    __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_XFRC);

    if ((hhcd->hc[chnum].ep_type == EP_TYPE_CTRL)||

        (hhcd->hc[chnum].ep_type == EP_TYPE_BULK))

    {

      __HAL_HCD_UNMASK_HALT_HC_INT(chnum);

      USB_HC_Halt(hhcd->Instance, chnum);

      __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_NAK);

    }

    else if(hhcd->hc[chnum].ep_type == EP_TYPE_INTR)

    {

      USBx_HC(chnum)->HCCHAR |= USB_OTG_HCCHAR_ODDFRM;

      hhcd->hc[chnum].urb_state = URB_DONE;

      HAL_HCD_HC_NotifyURBChange_Callback(hhcd, chnum, hhcd->hc[chnum].urb_state);

    }

    hhcd->hc[chnum].toggle_in ^= 1;

  }

  else if ((USBx_HC(chnum)->HCINT) &  USB_OTG_HCINT_CHH)

  {

    __HAL_HCD_MASK_HALT_HC_INT(chnum);

    if(hhcd->hc[chnum].state == HC_XFRC)

    {

      hhcd->hc[chnum].urb_state  = URB_DONE;

    }

    else if (hhcd->hc[chnum].state == HC_STALL)

    {

      hhcd->hc[chnum].urb_state  = URB_STALL;

    }

    else if((hhcd->hc[chnum].state == HC_XACTERR) ||

            (hhcd->hc[chnum].state == HC_DATATGLERR))

    {

      if(hhcd->hc[chnum].ErrCnt++ > 3)

      {

        hhcd->hc[chnum].ErrCnt = 0;