text: /**
    ******************************************************************************
    * @file           : usbd_desc.c
    * @version        : v1.0_Cube
    * @brief          : This file implements the USB Device descriptors
    ******************************************************************************
    *
    * Copyright (c) 2016 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 "usbd_core.h"
  #include "usbd_desc.h"
  #include "usbd_conf.h"
  
  /** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
    * @{
    */
  
  /** @defgroup USBD_DESC 
    * @brief USBD descriptors module
    * @{
    */ 
  
  /** @defgroup USBD_DESC_Private_TypesDefinitions
    * @{
    */ 
  /**
    * @}
    */ 
  
  /** @defgroup USBD_DESC_Private_Defines
    * @{
    */ 
  #define USBD_VID     1155
  #define USBD_LANGID_STRING     1033
  #define USBD_MANUFACTURER_STRING     "STMicroelectronics"
  #define USBD_PID_FS     22336
  #define USBD_PRODUCT_STRING_FS     "STM32 Virtual ComPort"
  #define USBD_SERIALNUMBER_STRING_FS     "00000000001A"
  #define USBD_CONFIGURATION_STRING_FS     "CDC Config"
  #define USBD_INTERFACE_STRING_FS     "CDC Interface"
  
  /* USER CODE BEGIN 0 */
  #define STRINGIZE_(x) #x
  #define STRINGIZE(x) STRINGIZE_(x)
  
  #if CANTACT_BUILD_NUMBER == 0
      #define CANTACT_SW_VER      "dev"
  #else
      #define CANTACT_SW_VER      "b" STRINGIZE(CANTACT_BUILD_NUMBER)
  #endif
  /* USER CODE END 0*/
  /**
    * @}
    */ 
  
  /** @defgroup USBD_DESC_Private_Macros
    * @{
    */ 
  /**
    * @}
    */ 
  
  /** @defgroup USBD_DESC_Private_Variables
    * @{
    */ 
  uint8_t *     USBD_FS_DeviceDescriptor( USBD_SpeedTypeDef speed , uint16_t *length);
  uint8_t *     USBD_FS_LangIDStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length);
  uint8_t *     USBD_FS_ManufacturerStrDescriptor ( USBD_SpeedTypeDef speed , uint16_t *length);
  uint8_t *     USBD_FS_ProductStrDescriptor ( USBD_SpeedTypeDef speed , uint16_t *length);
  uint8_t *     USBD_FS_SerialStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length);
  uint8_t *     USBD_FS_ConfigStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length);
  uint8_t *     USBD_FS_InterfaceStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length);
  
  #ifdef USB_SUPPORT_USER_STRING_DESC
  uint8_t *     USBD_FS_USRStringDesc (USBD_SpeedTypeDef speed, uint8_t idx , uint16_t *length);  
  #endif /* USB_SUPPORT_USER_STRING_DESC */  
  
  USBD_DescriptorsTypeDef FS_Desc =
  {
    USBD_FS_DeviceDescriptor,
    USBD_FS_LangIDStrDescriptor, 
    USBD_FS_ManufacturerStrDescriptor,
    USBD_FS_ProductStrDescriptor,
    USBD_FS_SerialStrDescriptor,
    USBD_FS_ConfigStrDescriptor,
    USBD_FS_InterfaceStrDescriptor,
  };
  
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
  /* USB Standard Device Descriptor */
  __ALIGN_BEGIN uint8_t USBD_FS_DeviceDesc[USB_LEN_DEV_DESC] __ALIGN_END =
    {
      0x12,                       /*bLength */
      USB_DESC_TYPE_DEVICE,       /*bDescriptorType*/
      0x00,                       /* bcdUSB */  
      0x02,
      0x02,                        /*bDeviceClass*/
      0x02,                       /*bDeviceSubClass*/
      0x00,                       /*bDeviceProtocol*/
      USB_MAX_EP0_SIZE,          /*bMaxPacketSize*/
      LOBYTE(USBD_VID),           /*idVendor*/
      HIBYTE(USBD_VID),           /*idVendor*/
      LOBYTE(USBD_PID_FS),           /*idVendor*/
      HIBYTE(USBD_PID_FS),           /*idVendor*/
      0x00,                       /*bcdDevice rel. 2.00*/
      0x02,
      USBD_IDX_MFC_STR,           /*Index of manufacturer  string*/
      USBD_IDX_PRODUCT_STR,       /*Index of product string*/
      USBD_IDX_SERIAL_STR,        /*Index of serial number string*/
      USBD_MAX_NUM_CONFIGURATION  /*bNumConfigurations*/
    } ; 
  /* USB_DeviceDescriptor */
  
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
  
  /* USB Standard Device Descriptor */
  __ALIGN_BEGIN uint8_t USBD_LangIDDesc[USB_LEN_LANGID_STR_DESC] __ALIGN_END =
  {
       USB_LEN_LANGID_STR_DESC,         
       USB_DESC_TYPE_STRING,       
       LOBYTE(USBD_LANGID_STRING),
       HIBYTE(USBD_LANGID_STRING), 
  };
  
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
  __ALIGN_BEGIN uint8_t USBD_StrDesc[USBD_MAX_STR_DESC_SIZ] __ALIGN_END;
  /**
    * @}
    */ 
  
  /** @defgroup USBD_DESC_Private_FunctionPrototypes
    * @{
    */ 
  /**
    * @}
    */ 
  
  /** @defgroup USBD_DESC_Private_Functions
    * @{
    */ 
  
  /**
  * @brief  USBD_FS_DeviceDescriptor 
  *         return the device descriptor
  * @param  speed : current device speed
  * @param  length : pointer to data length variable
  * @retval pointer to descriptor buffer
  */
  uint8_t *  USBD_FS_DeviceDescriptor( USBD_SpeedTypeDef speed , uint16_t *length)
  {
    *length = sizeof(USBD_FS_DeviceDesc);
    return USBD_FS_DeviceDesc;
  }
  
  /**
  * @brief  USBD_FS_LangIDStrDescriptor 
  *         return the LangID string descriptor
  * @param  speed : current device speed
  * @param  length : pointer to data length variable
  * @retval pointer to descriptor buffer
  */
  uint8_t *  USBD_FS_LangIDStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length)
  {
    *length =  sizeof(USBD_LangIDDesc);  
    return USBD_LangIDDesc;
  }
  
  /**
  * @brief  USBD_FS_ProductStrDescriptor 
  *         return the product string descriptor
  * @param  speed : current device speed
  * @param  length : pointer to data length variable
  * @retval pointer to descriptor buffer
  */
  uint8_t *  USBD_FS_ProductStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length)
  {
    if(speed == 0)
    {   
      USBD_GetString (USBD_PRODUCT_STRING_FS, USBD_StrDesc, length);
    }
    else
    {
      USBD_GetString (USBD_PRODUCT_STRING_FS, USBD_StrDesc, length);    
    }
    return USBD_StrDesc;
  }
  
  /**
  * @brief  USBD_FS_ManufacturerStrDescriptor 
  *         return the manufacturer string descriptor
  * @param  speed : current device speed
  * @param  length : pointer to data length variable
  * @retval pointer to descriptor buffer
  */
  uint8_t *  USBD_FS_ManufacturerStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length)
  {
    USBD_GetString (USBD_MANUFACTURER_STRING, USBD_StrDesc, length);
    return USBD_StrDesc;
  }
  
  /**
  * @brief  USBD_FS_SerialStrDescriptor 
  *         return the serial number string descriptor
  * @param  speed : current device speed
  * @param  length : pointer to data length variable
  * @retval pointer to descriptor buffer
  */
  uint8_t *  USBD_FS_SerialStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length)
  {
    if(speed  == USBD_SPEED_HIGH)
    {    
      USBD_GetString (USBD_SERIALNUMBER_STRING_FS, USBD_StrDesc, length);
    }
    else
    {
      USBD_GetString (USBD_SERIALNUMBER_STRING_FS, USBD_StrDesc, length);    
    }
    return USBD_StrDesc;
  }
  
  /**
  * @brief  USBD_FS_ConfigStrDescriptor 
  *         return the configuration string descriptor
  * @param  speed : current device speed
  * @param  length : pointer to data length variable
  * @retval pointer to descriptor buffer
  */
  uint8_t *  USBD_FS_ConfigStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length)
  {
    if(speed  == USBD_SPEED_HIGH)
    {  
      USBD_GetString (USBD_CONFIGURATION_STRING_FS, USBD_StrDesc, length);
    }
    else
    {
      USBD_GetString (USBD_CONFIGURATION_STRING_FS, USBD_StrDesc, length); 
    }
    return USBD_StrDesc;  
  }
  
  /**
  * @brief  USBD_HS_InterfaceStrDescriptor 
  *         return the interface string descriptor
  * @param  speed : current device speed
  * @param  length : pointer to data length variable
  * @retval pointer to descriptor buffer
  */
  uint8_t *  USBD_FS_InterfaceStrDescriptor( USBD_SpeedTypeDef speed , uint16_t *length)
  {
    if(speed == 0)
    {
      USBD_GetString (USBD_INTERFACE_STRING_FS, USBD_StrDesc, length);
    }
    else
    {
      USBD_GetString (USBD_INTERFACE_STRING_FS, USBD_StrDesc, length);
    }
    return USBD_StrDesc;  
  }
  /**
    * @}
    */ 
  
  /**
    * @}
    */ 
  
  /**
    * @}
    */ 
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  