通过cubemx配置 实现STM32H7 SDMMC+FATFS+USBMSC 虚拟U盘

1.实验目的

使用FAFTS文件操作系统,实现STM32虚拟U盘,读写外部SD卡

2.实验平台

硬件平台:正点原子阿波罗 STM32H734IIT6
开发工具:STM32CubeIDE 1.12.0
HAL库:STM32Cube FW_H7 V1.11.0

3.CubeMX配置

(1)配置SDMMC
在这里插入图片描述
GPIO都是默认引脚,开启SDMMC全局中断

(2)配置FATFS
打开USE_LABEL使能f_setlabel,可设置盘符的名称
在这里插入图片描述
使能H7内建的MDMA
在这里插入图片描述
(3)配置全速USB
仅作为从设备
在这里插入图片描述(4)配置USB_DEVICE
设置USB为大容量存储设备
适当增加MSC_MEDIA_PACKET,提高USB读写速度
在这里插入图片描述

在这里插入图片描述

(5)配置时钟
USB必须设置为48MHz
![(https://img-blog.csdnimg.cn/f637603939c846d48de945ccf80d3179.png)
SDMMC 输出频率为 200 /(2*5)= 20MHz,为了稳定最大频率不超过24MHz
在这里插入图片描述

注意:SDMMC中断优先级必须高于 USB_OTG中断

4.代码部分

sd卡测试代码

//	函数:FatFs_Check
//	功能:进行FatFs文件系统的挂载
//
void FatFs_Check(void) // 判断FatFs是否挂载成功,若没有创建FatFs则格式化SD卡
{
	BYTE work[_MAX_SS];

//	FATFS_LinkDriver(&SD_Driver, SDPath);	  // 初始化驱动
	MyFile_Res = f_mount(&SDFatFS, (const TCHAR*) SDPath, 1); //	挂载SD卡

	if (MyFile_Res == FR_OK) // 判断是否挂载成功
			{
		f_setlabel("UFO");
		printf("\r\nSD文件系统挂载成功\r\n");
	} else {
		printf("SD卡还未创建文件系统,即将格式化\r\n");

		MyFile_Res = f_mkfs("0:", FM_FAT32, 0, work, sizeof work); // 格式化SD卡,FAT32,簇默认大小16K

		if (MyFile_Res == FR_OK) // 判断是否格式化成功
			printf("SD卡格式化成功!\r\n");
		else
			printf("格式化失败,请检查或更换SD卡!\r\n");
	}
}
//	函数:FatFs_GetVolume
//	功能:计算设备的容量,包括总容量和剩余容量
//
void FatFs_GetVolume(void) // 计算设备容量
{
	FATFS *fs;							 // 定义结构体指针
	uint32_t SD_CardCapacity = 0;		 // SD卡的总容量
	uint32_t SD_FreeCapacity = 0;		 // SD卡空闲容量
	DWORD fre_clust, fre_sect, tot_sect; // 空闲簇,空闲扇区数,总扇区数

	f_getfree((const TCHAR*) SDPath, &fre_clust, &fs); // 获取SD卡剩余的簇

	tot_sect = (fs->n_fatent - 2) * fs->csize; // 总扇区数量 = 总的簇 * 每个簇包含的扇区数
	fre_sect = fre_clust * fs->csize;		   // 计算剩余的可用扇区数

	SD_CardCapacity = tot_sect / 2048; // SD卡总容量 = 总扇区数 * 512( 每扇区的字节数 ) / 1048576(换算成MB)
	SD_FreeCapacity = fre_sect / 2048; // 计算剩余的容量,单位为M
	printf("-------------------获取设备容量信息-----------------\r\n");
	printf("SD容量:%ldMB\r\n", SD_CardCapacity);
	printf("SD剩余:%ldMB\r\n", SD_FreeCapacity);
}

//	函数:FatFs_FileTest
//	功能:进行文件写入和读取测试
//
uint8_t FatFs_FileTest(void) // 文件创建和写入测试
{
	uint8_t i = 0;
	uint16_t BufferSize = 0;
	FIL MyFile;												   // 文件对象
	UINT MyFile_Num;										   //	数据长度
	BYTE MyFile_WriteBuffer[] = "STM32H7B0 SD卡 文件系统测试"; // 要写入的数据
	BYTE MyFile_ReadBuffer[1024];							   // 要读出的数据

	printf("-------------FatFs 文件创建和写入测试---------------\r\n");

	MyFile_Res = f_open(&MyFile, "0:FatFs Test.txt",
	FA_CREATE_ALWAYS | FA_WRITE); // 打开文件,若不存在则创建该文件
	if (MyFile_Res == FR_OK) {
		printf("文件打开/创建成功,准备写入数据...\r\n");

		MyFile_Res = f_write(&MyFile, MyFile_WriteBuffer,
				sizeof(MyFile_WriteBuffer), &MyFile_Num); // 向文件写入数据
		if (MyFile_Res == FR_OK) {
			printf("写入成功,写入内容为:\r\n");
			printf("%s\r\n", MyFile_WriteBuffer);
		} else {
			printf("文件写入失败,请检查SD卡或重新格式化!\r\n");
			f_close(&MyFile); // 关闭文件
			return ERROR;
		}
		f_close(&MyFile); // 关闭文件
	} else {
		printf("无法打开/创建文件,请检查SD卡或重新格式化!\r\n");
		f_close(&MyFile); // 关闭文件
		return ERROR;
	}

	printf("-------------FatFs 文件读取测试---------------\r\n");

	BufferSize = sizeof(MyFile_WriteBuffer) / sizeof(BYTE); // 计算写入的数据长度
	MyFile_Res = f_open(&MyFile, "0:FatFs Test.txt",
	FA_OPEN_EXISTING | FA_READ);						  // 打开文件,若不存在则创建该文件
	MyFile_Res = f_read(&MyFile, MyFile_ReadBuffer, BufferSize, &MyFile_Num); // 读取文件
	if (MyFile_Res == FR_OK) {
		printf("文件读取成功,正在校验数据...\r\n");

		for (i = 0; i < BufferSize; i++) {
			if (MyFile_WriteBuffer[i] != MyFile_ReadBuffer[i]) // 校验数据
					{
				printf("校验失败,请检查SD卡或重新格式化!\r\n");
				f_close(&MyFile); // 关闭文件
				return ERROR;
			}
		}
		printf("校验成功,读出的数据为:\r\n");
		printf("%s\r\n", MyFile_ReadBuffer);
	} else {
		printf("无法读取文件,请检查SD卡或重新格式化!\r\n");
		f_close(&MyFile); // 关闭文件
		return ERROR;
	}

	f_close(&MyFile); // 关闭文件
	return SUCCESS;
}

修改USB_DEVICE->App->usbd_storage_if.c文件
重写这几个方法,把SD卡映射到USB_DEVICE

//初始化
static int8_t STORAGE_Init_FS(uint8_t lun);
//获取容量
static int8_t STORAGE_GetCapacity_FS(uint8_t lun, uint32_t *block_num, uint16_t *block_size);
//判断状态
static int8_t STORAGE_IsReady_FS(uint8_t lun);
//读取
static int8_t STORAGE_Read_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);
//写入
static int8_t STORAGE_Write_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);
/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file           : usbd_storage_if.c
 * @version        : v1.0_Cube
 * @brief          : Memory management layer.
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2023 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "usbd_storage_if.h"

/* USER CODE BEGIN INCLUDE */
#include "fatfs.h"
/* USER CODE END INCLUDE */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
  * @brief Usb device.
  * @{
  */

/** @defgroup USBD_STORAGE
  * @brief Usb mass storage device module
  * @{
  */

/** @defgroup USBD_STORAGE_Private_TypesDefinitions
  * @brief Private types.
  * @{
  */

/* USER CODE BEGIN PRIVATE_TYPES */

/* USER CODE END PRIVATE_TYPES */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Private_Defines
  * @brief Private defines.
  * @{
  */

#define STORAGE_LUN_NBR                  1
#define STORAGE_BLK_NBR                  0x10000
#define STORAGE_BLK_SIZ                  0x200

/* USER CODE BEGIN PRIVATE_DEFINES */

/* USER CODE END PRIVATE_DEFINES */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Private_Macros
  * @brief Private macros.
  * @{
  */

/* USER CODE BEGIN PRIVATE_MACRO */

/* USER CODE END PRIVATE_MACRO */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Private_Variables
  * @brief 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 */
uint8_t pdrv_type;
/* USER CODE END PRIVATE_VARIABLES */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Exported_Variables
  * @brief Public variables.
  * @{
  */

extern USBD_HandleTypeDef hUsbDeviceFS;

/* USER CODE BEGIN EXPORTED_VARIABLES */

/* USER CODE END EXPORTED_VARIABLES */

/**
  * @}
  */

/** @defgroup USBD_STORAGE_Private_FunctionPrototypes
  * @brief Private functions declaration.
  * @{
  */

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 ---------------------------------------------------------*/
/**
  * @brief  Initializes the storage unit (medium) over USB FS IP
  * @param  lun: Logical unit number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_Init_FS(uint8_t lun)
{
  /* USER CODE BEGIN 2 */
	UNUSED(lun);
	pdrv_type = retSD;
	// sd卡已经在主函数中初始化
	// 这边仅把sd映射到usb
	return (USBD_OK);
  /* USER CODE END 2 */
}

/**
  * @brief  Returns the medium capacity.
  * @param  lun: Logical unit number.
  * @param  block_num: Number of total block number.
  * @param  block_size: Block size.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_GetCapacity_FS(uint8_t lun, uint32_t *block_num, uint16_t *block_size)
{
  /* USER CODE BEGIN 3 */
	int8_t ret = -1;
	ret = disk_ioctl(pdrv_type, GET_SECTOR_COUNT, (void*) block_num);
	if (ret < 0) {
		return ret;
	}
	*block_num = *block_num - 1;
	ret = disk_ioctl(pdrv_type, GET_SECTOR_SIZE, (void*) block_size);
	return ret;
  /* USER CODE END 3 */
}

/**
  * @brief   Checks whether the medium is ready.
  * @param  lun:  Logical unit number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_IsReady_FS(uint8_t lun)
{
  /* USER CODE BEGIN 4 */
	int8_t ret = -1;
	UNUSED(lun);
	ret = disk_status(pdrv_type);
	return ret;
  /* USER CODE END 4 */
}

/**
  * @brief  Checks whether the medium is write protected.
  * @param  lun: Logical unit number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_IsWriteProtected_FS(uint8_t lun)
{
  /* USER CODE BEGIN 5 */
	UNUSED(lun);

	return (USBD_OK);
  /* USER CODE END 5 */
}

/**
  * @brief  Reads data from the medium.
  * @param  lun: Logical unit number.
  * @param  buf: data buffer.
  * @param  blk_addr: Logical block address.
  * @param  blk_len: Blocks number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_Read_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
  /* USER CODE BEGIN 6 */
	int8_t ret = -1;
	UNUSED(lun);
//	HAL_GPIO_WritePin(LED_PC1_GPIO_Port, LED_PC1_Pin, 0);
	ret = disk_read(pdrv_type, (BYTE*) buf, (DWORD) blk_addr, (UINT) blk_len);
//	HAL_GPIO_WritePin(LED_PC1_GPIO_Port, LED_PC1_Pin, 1);
	return ret;
  /* USER CODE END 6 */
}

/**
  * @brief  Writes data into the medium.
  * @param  lun: Logical unit number.
  * @param  buf: data buffer.
  * @param  blk_addr: Logical block address.
  * @param  blk_len: Blocks number.
  * @retval USBD_OK if all operations are OK else USBD_FAIL
  */
int8_t STORAGE_Write_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
  /* USER CODE BEGIN 7 */
	int8_t ret = -1;
	UNUSED(lun);
//	HAL_GPIO_WritePin(LED_PC1_GPIO_Port, LED_PC1_Pin, 0);
	ret = disk_write(pdrv_type, (BYTE*) buf, (DWORD) blk_addr, (UINT) blk_len);
//	HAL_GPIO_WritePin(LED_PC1_GPIO_Port, LED_PC1_Pin, 1);
	return ret;
  /* USER CODE END 7 */
}

/**
  * @brief  Returns the Max Supported LUNs.
  * @param  None
  * @retval Lun(s) number.
  */
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 */

/**
  * @}
  */

/**
  * @}
  */


5.实验效果

在这里插入图片描述
无视上面的乱码,是串口工具的问题。
表面上看fatfs和u盘功能都正常了,其实faffs和usb msc是不能共存的,下一篇贴子,我加入了freeRTOS,并实现fatfs文件系统和usb mass storage class共存
跳转到下一贴

6.源码下载

https://download.csdn.net/download/hjn0618/87751792

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