text: /*
   * This file is part of the MicroPython project, http://micropython.org/
   */
  
  /**
    ******************************************************************************
    * @file    USB_Device/CDC_Standalone/Src/usbd_conf.c
    * @author  MCD Application Team
    * @version V1.0.1
    * @date    26-February-2014
    * @brief   This file implements the USB Device library callbacks and MSP
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
    *
    * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
    * You may not use this file except in compliance with the License.
    * You may obtain a copy of the License at:
    *
    *        http://www.st.com/software_license_agreement_liberty_v2
    *
    * Unless required by applicable law or agreed to in writing, software
    * distributed under the License is distributed on an "AS IS" BASIS,
    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    * See the License for the specific language governing permissions and
    * limitations under the License.
    *
    ******************************************************************************
    */
  
  #include "usbd_core.h"
  #include "py/obj.h"
  #include "py/mphal.h"
  #include "irq.h"
  #include "usb.h"
  
  #if MICROPY_HW_USB_FS || MICROPY_HW_USB_HS
  
  #if MICROPY_HW_USB_FS
  PCD_HandleTypeDef pcd_fs_handle;
  #endif
  #if MICROPY_HW_USB_HS
  PCD_HandleTypeDef pcd_hs_handle;
  #endif
  
  /*******************************************************************************
                         PCD BSP Routines
  *******************************************************************************/
  
  /**
    * @brief  Initializes the PCD MSP.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_MspInit(PCD_HandleTypeDef *hpcd) {
      if (hpcd->Instance == USB_OTG_FS) {
          #if defined(STM32H7)
          const uint32_t otg_alt = GPIO_AF10_OTG1_FS;
          #else
          const uint32_t otg_alt = GPIO_AF10_OTG_FS;
          #endif
  
          mp_hal_pin_config(pin_A11, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE, otg_alt);
          mp_hal_pin_config_speed(pin_A11, GPIO_SPEED_FREQ_VERY_HIGH);
          mp_hal_pin_config(pin_A12, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE, otg_alt);
          mp_hal_pin_config_speed(pin_A12, GPIO_SPEED_FREQ_VERY_HIGH);
  
          #if defined(MICROPY_HW_USB_VBUS_DETECT_PIN)
          // USB VBUS detect pin is always A9
          mp_hal_pin_config(MICROPY_HW_USB_VBUS_DETECT_PIN, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_NONE, 0);
          #endif
  
          #if defined(MICROPY_HW_USB_OTG_ID_PIN)
          // USB ID pin is always A10
          mp_hal_pin_config(MICROPY_HW_USB_OTG_ID_PIN, MP_HAL_PIN_MODE_ALT_OPEN_DRAIN, MP_HAL_PIN_PULL_UP, otg_alt);
          #endif
  
          #if defined(STM32H7)
          // Keep USB clock running during sleep or else __WFI() will disable the USB
          __HAL_RCC_USB2_OTG_FS_CLK_SLEEP_ENABLE();
          __HAL_RCC_USB2_OTG_FS_ULPI_CLK_SLEEP_DISABLE();
          #endif
  
          // Enable USB FS Clocks
          __USB_OTG_FS_CLK_ENABLE();
  
          #if defined(STM32L4)
          // 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();
          }
          #endif
  
          // Configure and enable USB FS interrupt
          NVIC_SetPriority(OTG_FS_IRQn, IRQ_PRI_OTG_FS);
          HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
      }
      #if MICROPY_HW_USB_HS
      else if (hpcd->Instance == USB_OTG_HS) {
          #if MICROPY_HW_USB_HS_IN_FS
  
          #if defined(STM32H7)
          const uint32_t otg_alt = GPIO_AF12_OTG2_FS;
          #else
          const uint32_t otg_alt = GPIO_AF12_OTG_HS_FS;
          #endif
  
          // Configure USB FS GPIOs
          mp_hal_pin_config(pin_B14, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE, otg_alt);
          mp_hal_pin_config_speed(pin_B14, GPIO_SPEED_FREQ_VERY_HIGH);
          mp_hal_pin_config(pin_B15, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE, otg_alt);
          mp_hal_pin_config_speed(pin_B15, GPIO_SPEED_FREQ_VERY_HIGH);
  
          #if defined(MICROPY_HW_USB_VBUS_DETECT_PIN)
          // Configure VBUS Pin
          mp_hal_pin_config(MICROPY_HW_USB_VBUS_DETECT_PIN, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_NONE, 0);
          #endif
  
          #if defined(MICROPY_HW_USB_OTG_ID_PIN)
          // Configure ID pin
          mp_hal_pin_config(MICROPY_HW_USB_OTG_ID_PIN, MP_HAL_PIN_MODE_ALT_OPEN_DRAIN, MP_HAL_PIN_PULL_UP, otg_alt);
          #endif
  
          // Enable calling WFI and correct function of the embedded USB_FS_IN_HS phy
          __HAL_RCC_USB_OTG_HS_ULPI_CLK_SLEEP_DISABLE();
          __HAL_RCC_USB_OTG_HS_CLK_SLEEP_ENABLE();
  
          // Enable USB HS Clocks
  
          #if defined(STM32F723xx) || defined(STM32F733xx)
          // Needs to remain awake during sleep or else __WFI() will disable the USB
          __HAL_RCC_USB_OTG_HS_ULPI_CLK_SLEEP_ENABLE();
          __HAL_RCC_OTGPHYC_CLK_ENABLE();
          __HAL_RCC_USB_OTG_HS_ULPI_CLK_ENABLE();
          #endif
  
          __HAL_RCC_USB_OTG_HS_CLK_ENABLE();
  
          #else // !MICROPY_HW_USB_HS_IN_FS
  
          // Configure USB HS GPIOs
          static const mp_hal_pin_obj_t usb_pins[] = {
              pin_A5, pin_C0, pin_H4, pin_I11, // CLK, STP, NXT, DIR
              pin_A3, pin_B0, pin_B1, pin_B5, pin_B10, pin_B11, pin_B12, pin_B13, // D0-D7
          };
          for (size_t i = 0; i < MP_ARRAY_SIZE(usb_pins); ++i) {
              mp_hal_pin_config(usb_pins[i], MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE, GPIO_AF10_OTG_HS);
              mp_hal_pin_config_speed(usb_pins[i], GPIO_SPEED_FREQ_VERY_HIGH);
          }
  
          // Enable USB HS Clocks
          __HAL_RCC_USB_OTG_HS_CLK_ENABLE();
          __HAL_RCC_USB_OTG_HS_CLK_SLEEP_ENABLE();
          __HAL_RCC_USB_OTG_HS_ULPI_CLK_ENABLE();
          __HAL_RCC_USB_OTG_HS_ULPI_CLK_SLEEP_ENABLE();
  
          #endif // !MICROPY_HW_USB_HS_IN_FS
  
          // Configure and enable USB HS interrupt
          NVIC_SetPriority(OTG_HS_IRQn, IRQ_PRI_OTG_HS);
          HAL_NVIC_EnableIRQ(OTG_HS_IRQn);
      }
      #endif // MICROPY_HW_USB_HS
  }
  
  /**
    * @brief  DeInitializes the PCD MSP.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_MspDeInit(PCD_HandleTypeDef *hpcd) {
      if (hpcd->Instance == USB_OTG_FS) {
          /* Disable USB FS Clocks */
          __USB_OTG_FS_CLK_DISABLE();
          __SYSCFG_CLK_DISABLE();
      }
      #if MICROPY_HW_USB_HS
      else if (hpcd->Instance == USB_OTG_HS) {
          /* Disable USB FS Clocks */
          __USB_OTG_HS_CLK_DISABLE();
          __SYSCFG_CLK_DISABLE();
      }
      #endif
  }
  
  /*******************************************************************************
                         LL Driver Callbacks (PCD -> USB Device Library)
  *******************************************************************************/
  
  /**
    * @brief  Setup stage callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_SetupStageCallback(PCD_HandleTypeDef *hpcd) {
      USBD_LL_SetupStage(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(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(hpcd->pData, epnum, hpcd->IN_ep[epnum].xfer_buff);
  }
  
  /**
    * @brief  SOF callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  /*
  This is now handled by the USB CDC interface.
  void HAL_PCD_SOFCallback(PCD_HandleTypeDef *hpcd)
  {
    USBD_LL_SOF(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) {
          #if defined(PCD_SPEED_HIGH)
          case PCD_SPEED_HIGH:
              speed = USBD_SPEED_HIGH;
              break;
          #endif
  
          case PCD_SPEED_FULL:
              speed = USBD_SPEED_FULL;
              break;
  
          default:
              speed = USBD_SPEED_FULL;
              break;
      }
      USBD_LL_SetSpeed(hpcd->pData, speed);
  
      // Reset Device
      USBD_LL_Reset(hpcd->pData);
  }
  
  /**
    * @brief  Suspend callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_SuspendCallback(PCD_HandleTypeDef *hpcd) {
      USBD_LL_Suspend(hpcd->pData);
  }
  
  /**
    * @brief  Resume callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_ResumeCallback(PCD_HandleTypeDef *hpcd) {
      USBD_LL_Resume(hpcd->pData);
  }
  
  /**
    * @brief  ISOC Out Incomplete callback.
    * @param  hpcd: PCD handle
    * @param  epnum: Endpoint Number
    * @retval None
    */
  void HAL_PCD_ISOOUTIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum) {
      USBD_LL_IsoOUTIncomplete(hpcd->pData, epnum);
  }
  
  /**
    * @brief  ISOC In Incomplete callback.
    * @param  hpcd: PCD handle
    * @param  epnum: Endpoint Number
    * @retval None
    */
  void HAL_PCD_ISOINIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum) {
      USBD_LL_IsoINIncomplete(hpcd->pData, epnum);
  }
  
  /**
    * @brief  Connect callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_ConnectCallback(PCD_HandleTypeDef *hpcd) {
      USBD_LL_DevConnected(hpcd->pData);
  }
  
  /**
    * @brief  Disconnect callback.
    * @param  hpcd: PCD handle
    * @retval None
    */
  void HAL_PCD_DisconnectCallback(PCD_HandleTypeDef *hpcd) {
      USBD_LL_DevDisconnected(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, int high_speed) {
      #if MICROPY_HW_USB_FS
      if (pdev->id ==  USB_PHY_FS_ID) {
          // Set LL Driver parameters
          pcd_fs_handle.Instance = USB_OTG_FS;
          #if MICROPY_HW_USB_ENABLE_CDC2
          pcd_fs_handle.Init.dev_endpoints = 6;
          #else
          pcd_fs_handle.Init.dev_endpoints = 4;
          #endif
          pcd_fs_handle.Init.use_dedicated_ep1 = 0;
          pcd_fs_handle.Init.ep0_mps = 0x40;
          pcd_fs_handle.Init.dma_enable = 0;
          pcd_fs_handle.Init.low_power_enable = 0;
          pcd_fs_handle.Init.phy_itface = PCD_PHY_EMBEDDED;
          pcd_fs_handle.Init.Sof_enable = 0;
          pcd_fs_handle.Init.speed = PCD_SPEED_FULL;
          #if defined(STM32L4)
          pcd_fs_handle.Init.lpm_enable = DISABLE;
          pcd_fs_handle.Init.battery_charging_enable = DISABLE;
          #endif
          #if !defined(MICROPY_HW_USB_VBUS_DETECT_PIN)
          pcd_fs_handle.Init.vbus_sensing_enable = 0; // No VBUS Sensing on USB0
          #else
          pcd_fs_handle.Init.vbus_sensing_enable = 1;
          #endif
  
          // Link The driver to the stack
          pcd_fs_handle.pData = pdev;
          pdev->pData = &pcd_fs_handle;
  
          // Initialize LL Driver
          HAL_PCD_Init(&pcd_fs_handle);
  
          // We have 320 32-bit words in total to use here
          #if MICROPY_HW_USB_ENABLE_CDC2
          HAL_PCD_SetRxFiFo(&pcd_fs_handle, 128);
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 0, 32); // EP0
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 1, 64); // MSC / HID
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 2, 16); // CDC CMD
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 3, 32); // CDC DATA
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 4, 16); // CDC2 CMD
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 5, 32); // CDC2 DATA
          #else
          HAL_PCD_SetRxFiFo(&pcd_fs_handle, 128);
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 0, 32); // EP0
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 1, 64); // MSC / HID
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 2, 32); // CDC CMD
          HAL_PCD_SetTxFiFo(&pcd_fs_handle, 3, 64); // CDC DATA
          #endif
      }
      #endif
      #if MICROPY_HW_USB_HS
      if (pdev->id == USB_PHY_HS_ID) {
          // Set LL Driver parameters
          pcd_hs_handle.Instance = USB_OTG_HS;
          pcd_hs_handle.Init.dev_endpoints = 6;
          pcd_hs_handle.Init.use_dedicated_ep1 = 0;
          pcd_hs_handle.Init.ep0_mps = 0x40;
          pcd_hs_handle.Init.dma_enable = 0;
          pcd_hs_handle.Init.low_power_enable = 0;
          pcd_hs_handle.Init.lpm_enable = DISABLE;
          pcd_hs_handle.Init.battery_charging_enable = DISABLE;
          pcd_hs_handle.Init.Sof_enable = 0;
          pcd_hs_handle.Init.use_external_vbus = 0;
  
          #if !defined(MICROPY_HW_USB_VBUS_DETECT_PIN)
          pcd_hs_handle.Init.vbus_sensing_enable = 0; // No VBUS Sensing on USB0
          #else
          pcd_hs_handle.Init.vbus_sensing_enable = 1;
          #endif
  
          #if MICROPY_HW_USB_HS_IN_FS
  
          #if defined(STM32F723xx) || defined(STM32F733xx)
          pcd_hs_handle.Init.phy_itface = USB_OTG_HS_EMBEDDED_PHY;
          #else
          pcd_hs_handle.Init.phy_itface = PCD_PHY_EMBEDDED;
          #endif
  
          if (high_speed) {
              pcd_hs_handle.Init.speed = PCD_SPEED_HIGH;
          } else {
              pcd_hs_handle.Init.speed = PCD_SPEED_HIGH_IN_FULL;
          }
  
          #else
  
          // USB HS with external PHY
          pcd_hs_handle.Init.phy_itface = PCD_PHY_ULPI;
          pcd_hs_handle.Init.speed = PCD_SPEED_HIGH;
  
          #endif
  
          // Link The driver to the stack
          pcd_hs_handle.pData = pdev;
          pdev->pData = &pcd_hs_handle;
  
          // Initialize LL Driver
          HAL_PCD_Init(&pcd_hs_handle);
  
          // We have 1024 32-bit words in total to use here
          HAL_PCD_SetRxFiFo(&pcd_hs_handle, 464);
          HAL_PCD_SetTxFiFo(&pcd_hs_handle, 0, 32); // EP0
          HAL_PCD_SetTxFiFo(&pcd_hs_handle, 1, 256); // MSC / HID
          HAL_PCD_SetTxFiFo(&pcd_hs_handle, 2, 8); // CDC CMD
          HAL_PCD_SetTxFiFo(&pcd_hs_handle, 3, 128); // CDC DATA
          HAL_PCD_SetTxFiFo(&pcd_hs_handle, 4, 8); // CDC2 CMD
          HAL_PCD_SetTxFiFo(&pcd_hs_handle, 5, 128); // CDC2 DATA
      }
      #endif  // MICROPY_HW_USB_HS
  
      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_PCD_DeInit(pdev->pData);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_Start(pdev->pData);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_Stop(pdev->pData);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_EP_Open(pdev->pData, ep_addr, ep_mps, ep_type);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_EP_Close(pdev->pData, ep_addr);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_EP_Flush(pdev->pData, ep_addr);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_EP_SetStall(pdev->pData, ep_addr);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_EP_ClrStall(pdev->pData, ep_addr);
      return USBD_OK;
  }
  
  /**
    * @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 = 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 an USB address to the device
    * @param  pdev: Device handle
    * @param  dev_addr: USB address
    * @retval USBD Status
    */
  USBD_StatusTypeDef USBD_LL_SetUSBAddress(USBD_HandleTypeDef *pdev, uint8_t dev_addr) {
      HAL_PCD_SetAddress(pdev->pData, dev_addr);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_EP_Transmit(pdev->pData, ep_addr, pbuf, size);
      return USBD_OK;
  }
  
  /**
    * @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_PCD_EP_Receive(pdev->pData, ep_addr, pbuf, size);
      return USBD_OK;
  }
  
  /**
    * @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(pdev->pData, ep_addr);
  }
  
  /**
    * @brief  Delay routine for the USB Device Library
    * @param  Delay: Delay in ms
    * @retval None
    */
  void USBD_LL_Delay(uint32_t Delay) {
      HAL_Delay(Delay);
  }
  
  #endif // MICROPY_HW_USB_FS || MICROPY_HW_USB_HS
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  