我想把STM32F4系列的设备对外表现为一个U盘,即在PC端接入USB,显示为U盘。我在cubemx配置了USB Device,以及MSC。目前暂时没有用任何外挂存储,单单设置这些是否能够对外表现为U盘呢? 加上存储的话,无非就是添加文件系统后对存储的操作,不知道理解是否正确? 现在问题是我在cubemx设置后,PC端显示设备描述符请求失败,我需要如何改动呢? file:///C:\Users\windows8\AppData\Roaming\Tencent\Users\344055076\QQ\WinTemp\RichOle\I4E79~3_`B%WYHJCB`NYGKH.png |
这个是我的配置
这里估计是枚举不成功
/**
******************************************************************************
* @file : usbd_storage_if.c
* @brief : Memory management layer
******************************************************************************
* COPYRIGHT(c) 2016 STMicroelectronics
*
* 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 "usbd_storage_if.h"
/* USER CODE BEGIN INCLUDE */
#include "fat16.h"
/* USER CODE END INCLUDE */
/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
* @{
*/
/** @defgroup USBD_STORAGE
* @brief usbd core module
* @{
*/
/** @defgroup USBD_STORAGE_Private_TypesDefinitions
* @{
*/
/* USER CODE BEGIN PRIVATE_TYPES */
/* USER CODE END PRIVATE_TYPES */
/**
* @}
*/
/** @defgroup USBD_STORAGE_Private_Defines
* @{
*/
#define STORAGE_LUN_NBR 1
#define STORAGE_BLK_NBR 0x100
#define STORAGE_BLK_SIZ 0x800
/* USER CODE BEGIN PRIVATE_DEFINES */
/* USER CODE END PRIVATE_DEFINES */
/**
* @}
*/
/** @defgroup USBD_STORAGE_Private_Macros
* @{
*/
/* USER CODE BEGIN PRIVATE_MACRO */
/* USER CODE END PRIVATE_MACRO */
/**
* @}
*/
/** @defgroup USBD_STORAGE_IF_Private_Variables
* @{
*/
/* USER CODE BEGIN INQUIRY_DATA_FS */
/* USB Mass storage Standard Inquiry Data */
const int8_t STORAGE_Inquirydata_FS[] = {/* 36 */
/* LUN 0 */
0x00,
0x80,
0x02,
0x02,
(STANDARD_INQUIRY_DATA_LEN - 5),
0x00,
0x00,
0x00,
'S', 'T', 'M', ' ', ' ', ' ', ' ', ' ', /* Manufacturer : 8 bytes */
'P', 'r', 'o', 'd', 'u', 'c', 't', ' ', /* Product : 16 Bytes */
' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
'0', '.', '0' ,'1', /* Version : 4 Bytes */
};
/* USER CODE END INQUIRY_DATA_FS */
/* USER CODE BEGIN PRIVATE_VARIABLES */
/* USER CODE END PRIVATE_VARIABLES */
/**
* @}
*/
/** @defgroup USBD_STORAGE_IF_Exported_Variables
* @{
*/
extern USBD_HandleTypeDef hUsbDeviceFS;
/* USER CODE BEGIN EXPORTED_VARIABLES */
/* USER CODE END EXPORTED_VARIABLES */
/**
* @}
*/
/** @defgroup USBD_STORAGE_Private_FunctionPrototypes
* @{
*/
static int8_t STORAGE_Init_FS (uint8_t lun);
static int8_t STORAGE_GetCapacity_FS (uint8_t lun,
uint32_t *block_num,
uint16_t *block_size);
static int8_t STORAGE_IsReady_FS (uint8_t lun);
static int8_t STORAGE_IsWriteProtected_FS (uint8_t lun);
static int8_t STORAGE_Read_FS (uint8_t lun,
uint8_t *buf,
uint32_t blk_addr,
uint16_t blk_len);
static int8_t STORAGE_Write_FS (uint8_t lun,
uint8_t *buf,
uint32_t blk_addr,
uint16_t blk_len);
static int8_t STORAGE_GetMaxLun_FS (void);
/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */
/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */
/**
* @}
*/
USBD_StorageTypeDef USBD_Storage_Interface_fops_FS =
{
STORAGE_Init_FS,
STORAGE_GetCapacity_FS,
STORAGE_IsReady_FS,
STORAGE_IsWriteProtected_FS,
STORAGE_Read_FS,
STORAGE_Write_FS,
STORAGE_GetMaxLun_FS,
(int8_t *)STORAGE_Inquirydata_FS,
};
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : STORAGE_Init_FS
* Description :
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_Init_FS (uint8_t lun)
{
/* USER CODE BEGIN 2 */
return (USBD_OK);
/* USER CODE END 2 */
}
/*******************************************************************************
* Function Name : STORAGE_GetCapacity_FS
* Description :
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_GetCapacity_FS (uint8_t lun, uint32_t *block_num, uint16_t *block_size)
{
/* USER CODE BEGIN 3 */
*block_num = STORAGE_BLK_NBR;
*block_size = STORAGE_BLK_SIZ;
return (USBD_OK);
/* USER CODE END 3 */
}
/*******************************************************************************
* Function Name : STORAGE_IsReady_FS
* Description :
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_IsReady_FS (uint8_t lun)
{
/* USER CODE BEGIN 4 */
return (USBD_OK);
/* USER CODE END 4 */
}
/*******************************************************************************
* Function Name : STORAGE_IsWriteProtected_FS
* Description :
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_IsWriteProtected_FS (uint8_t lun)
{
/* USER CODE BEGIN 5 */
return (USBD_OK);
/* USER CODE END 5 */
}
/*******************************************************************************
* Function Name : STORAGE_Read_FS
* Description :
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_Read_FS (uint8_t lun,
uint8_t *buf,
uint32_t blk_addr,
uint16_t blk_len)
{
/* USER CODE BEGIN 6 */
FATReadLBA(blk_addr * STORAGE_BLK_SIZ,(uint8_t*)buf, (uint32_t)blk_len * STORAGE_BLK_SIZ);
return (USBD_OK);
/* USER CODE END 6 */
}
/*******************************************************************************
* Function Name : STORAGE_Write_FS
* Description :
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_Write_FS (uint8_t lun,
uint8_t *buf,
uint32_t blk_addr,
uint16_t blk_len)
{
/* USER CODE BEGIN 7 */
FATWriteLBA(blk_addr * STORAGE_BLK_SIZ,(uint8_t*)buf, (uint32_t)blk_len * STORAGE_BLK_SIZ);
return (USBD_OK);
/* USER CODE END 7 */
}
/*******************************************************************************
* Function Name : STORAGE_GetMaxLun_FS
* Description :
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_GetMaxLun_FS (void)
{
/* USER CODE BEGIN 8 */
return (STORAGE_LUN_NBR - 1);
/* USER CODE END 8 */
}
/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */
/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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