USB MSC类存储设备

效果演示

这里演示了，FatFs挂载SPI Flash设备，创建一个test.txt文件，写入Hello,World!字符串，之后PC打开枚举成功的U盘设备，打开这个文本文件，将其内容改为了Aron566,2022-09-28

配置说明

硬件情况：

• STM32H743VIT6
• 外部SPI Flash GD25Q64C 8MB的空间大小

Flash信息：

 *  - 页面编程时间：典型值0.6ms
 *  - 扇区擦除时间：典型值50ms
 *  - 块擦除时间：典型值0.15/0.20s
 *  - 芯片擦除时间：典型值25s
 *  - 统一的4K字节扇区
 *  - 统一的32/64K字节块
 *  - 512Bytes编程
 *  - 10W次编程

这里用到了开源驱动组件SFUD，移植方法可以查看这里:https://blog.csdn.net/weixin_42892101/article/details/106588125

USB MSC类配置

MSC类的配置，可以实用CubeMX直接配置生成，网上有太多图文配置教程了，这里不多写，配置好之后
编译运行，USB连接PC电脑，应该会弹出一个待格式化的U盘

FatFs移植

移植FatFs建议首先确定自己的Flash驱动没问题
带RTOS的移植方法可以查看这里：https://blog.csdn.net/weixin_42892101/article/details/112245585
本次移植不带RTOS
工程中新建目录：FatFs用于存放源码，增加port目录存放移植接口文件，src目录存放源码

FatFs的配置

配置中，FF_CODE_PAGE改为437、FF_LFN_UNICODE为0，改为中文简体936 + UTF-8编码会乱码，知道的朋友可以说下

/*---------------------------------------------------------------------------/
/  FatFs Functional Configurations
/---------------------------------------------------------------------------*/

#define FFCONF_DEF	86631	/* Revision ID */

/*---------------------------------------------------------------------------/
/ Function Configurations
/---------------------------------------------------------------------------*/

#define FF_FS_READONLY	0
/* This option switches read-only configuration. (0:Read/Write or 1:Read-only)
/  Read-only configuration removes writing API functions, f_write(), f_sync(),
/  f_unlink(), f_mkdir(), f_chmod(), f_rename(), f_truncate(), f_getfree()
/  and optional writing functions as well. */


#define FF_FS_MINIMIZE	0
/* This option defines minimization level to remove some basic API functions.
/
/   0: Basic functions are fully enabled.
/   1: f_stat(), f_getfree(), f_unlink(), f_mkdir(), f_truncate() and f_rename()
/      are removed.
/   2: f_opendir(), f_readdir() and f_closedir() are removed in addition to 1.
/   3: f_lseek() function is removed in addition to 2. */


#define FF_USE_FIND		1
/* This option switches filtered directory read functions, f_findfirst() and
/  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */


#define FF_USE_MKFS		1
/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */


#define FF_USE_FASTSEEK	0
/* This option switches fast seek function. (0:Disable or 1:Enable) */


#define FF_USE_EXPAND	0
/* This option switches f_expand function. (0:Disable or 1:Enable) */


#define FF_USE_CHMOD	0
/* This option switches attribute manipulation functions, f_chmod() and f_utime().
/  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */


#define FF_USE_LABEL	0
/* This option switches volume label functions, f_getlabel() and f_setlabel().
/  (0:Disable or 1:Enable) */


#define FF_USE_FORWARD	0
/* This option switches f_forward() function. (0:Disable or 1:Enable) */


#define FF_USE_STRFUNC	0
#define FF_PRINT_LLI	0
#define FF_PRINT_FLOAT	1
#define FF_STRF_ENCODE	3
/* FF_USE_STRFUNC switches string functions, f_gets(), f_putc(), f_puts() and
/  f_printf().
/
/   0: Disable. FF_PRINT_LLI, FF_PRINT_FLOAT and FF_STRF_ENCODE have no effect.
/   1: Enable without LF-CRLF conversion.
/   2: Enable with LF-CRLF conversion.
/
/  FF_PRINT_LLI = 1 makes f_printf() support long long argument and FF_PRINT_FLOAT = 1/2
   makes f_printf() support floating point argument. These features want C99 or later.
/  When FF_LFN_UNICODE >= 1 with LFN enabled, string functions convert the character
/  encoding in it. FF_STRF_ENCODE selects assumption of character encoding ON THE FILE
/  to be read/written via those functions.
/
/   0: ANSI/OEM in current CP
/   1: Unicode in UTF-16LE
/   2: Unicode in UTF-16BE
/   3: Unicode in UTF-8
*/


/*---------------------------------------------------------------------------/
/ Locale and Namespace Configurations
/---------------------------------------------------------------------------*/

#define FF_CODE_PAGE	437
/* This option specifies the OEM code page to be used on the target system.
/  Incorrect code page setting can cause a file open failure.
/
/   437 - U.S.
/   720 - Arabic
/   737 - Greek
/   771 - KBL
/   775 - Baltic
/   850 - Latin 1
/   852 - Latin 2
/   855 - Cyrillic
/   857 - Turkish
/   860 - Portuguese
/   861 - Icelandic
/   862 - Hebrew
/   863 - Canadian French
/   864 - Arabic
/   865 - Nordic
/   866 - Russian
/   869 - Greek 2
/   932 - Japanese (DBCS)
/   936 - Simplified Chinese (DBCS)
/   949 - Korean (DBCS)
/   950 - Traditional Chinese (DBCS)
/     0 - Include all code pages above and configured by f_setcp()
*/


#define FF_USE_LFN		1
#define FF_MAX_LFN		255
/* The FF_USE_LFN switches the support for LFN (long file name).
/
/   0: Disable LFN. FF_MAX_LFN has no effect.
/   1: Enable LFN with static  working buffer on the BSS. Always NOT thread-safe.
/   2: Enable LFN with dynamic working buffer on the STACK.
/   3: Enable LFN with dynamic working buffer on the HEAP.
/
/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN function
/  requiers certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and
/  additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.
/  The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can
/  be in range of 12 to 255. It is recommended to be set it 255 to fully support LFN
/  specification.
/  When use stack for the working buffer, take care on stack overflow. When use heap
/  memory for the working buffer, memory management functions, ff_memalloc() and
/  ff_memfree() exemplified in ffsystem.c, need to be added to the project. */


#define FF_LFN_UNICODE	0
/* This option switches the character encoding on the API when LFN is enabled.
/
/   0: ANSI/OEM in current CP (TCHAR = char)
/   1: Unicode in UTF-16 (TCHAR = WCHAR)
/   2: Unicode in UTF-8 (TCHAR = char)
/   3: Unicode in UTF-32 (TCHAR = DWORD)
/
/  Also behavior of string I/O functions will be affected by this option.
/  When LFN is not enabled, this option has no effect. */


#define FF_LFN_BUF		255
#define FF_SFN_BUF		12
/* This set of options defines size of file name members in the FILINFO structure
/  which is used to read out directory items. These values should be suffcient for
/  the file names to read. The maximum possible length of the read file name depends
/  on character encoding. When LFN is not enabled, these options have no effect. */


#define FF_FS_RPATH		2
/* This option configures support for relative path.
/
/   0: Disable relative path and remove related functions.
/   1: Enable relative path. f_chdir() and f_chdrive() are available.
/   2: f_getcwd() function is available in addition to 1.
*/


/*---------------------------------------------------------------------------/
/ Drive/Volume Configurations
/---------------------------------------------------------------------------*/

#define FF_VOLUMES		10
/* Number of volumes (logical drives) to be used. (1-10) */


#define FF_STR_VOLUME_ID	8
#define FF_VOLUME_STRS		"RAM","NAND","CF","SD","SD2","USB","USB2","USB3","HHT_Disk"
/* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
/  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
/  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
/  logical drives. Number of items must not be less than FF_VOLUMES. Valid
/  characters for the volume ID strings are A-Z, a-z and 0-9, however, they are
/  compared in case-insensitive. If FF_STR_VOLUME_ID >= 1 and FF_VOLUME_STRS is
/  not defined, a user defined volume string table needs to be defined as:
/
/  const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...
*/


#define FF_MULTI_PARTITION	0
/* This option switches support for multiple volumes on the physical drive.
/  By default (0), each logical drive number is bound to the same physical drive
/  number and only an FAT volume found on the physical drive will be mounted.
/  When this function is enabled (1), each logical drive number can be bound to
/  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()
/  funciton will be available. */


#define FF_MIN_SS		512
#define FF_MAX_SS		512
/* This set of options configures the range of sector size to be supported. (512,
/  1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and
/  harddisk, but a larger value may be required for on-board flash memory and some
/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured
/  for variable sector size mode and disk_ioctl() function needs to implement
/  GET_SECTOR_SIZE command. */


#define FF_LBA64		0
/* This option switches support for 64-bit LBA. (0:Disable or 1:Enable)
/  To enable the 64-bit LBA, also exFAT needs to be enabled. (FF_FS_EXFAT == 1) */


#define FF_MIN_GPT		0x10000000
/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and
/  f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */


#define FF_USE_TRIM		0
/* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)
/  To enable Trim function, also CTRL_TRIM command should be implemented to the
/  disk_ioctl() function. */



/*---------------------------------------------------------------------------/
/ System Configurations
/---------------------------------------------------------------------------*/

#define FF_FS_TINY		0
/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)
/  At the tiny configuration, size of file object (FIL) is shrinked FF_MAX_SS bytes.
/  Instead of private sector buffer eliminated from the file object, common sector
/  buffer in the filesystem object (FATFS) is used for the file data transfer. */


#define FF_FS_EXFAT		1
/* This option switches support for exFAT filesystem. (0:Disable or 1:Enable)
/  To enable exFAT, also LFN needs to be enabled. (FF_USE_LFN >= 1)
/  Note that enabling exFAT discards ANSI C (C89) compatibility. */


#define FF_FS_NORTC		0
#define FF_NORTC_MON	1
#define FF_NORTC_MDAY	1
#define FF_NORTC_YEAR	2020
/* The option FF_FS_NORTC switches timestamp functiton. If the system does not have
/  any RTC function or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable
/  the timestamp function. Every object modified by FatFs will have a fixed timestamp
/  defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.
/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be
/  added to the project to read current time form real-time clock. FF_NORTC_MON,
/  FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.
/  These options have no effect in read-only configuration (FF_FS_READONLY = 1). */


#define FF_FS_NOFSINFO	0
/* If you need to know correct free space on the FAT32 volume, set bit 0 of this
/  option, and f_getfree() function at first time after volume mount will force
/  a full FAT scan. Bit 1 controls the use of last allocated cluster number.
/
/  bit0=0: Use free cluster count in the FSINFO if available.
/  bit0=1: Do not trust free cluster count in the FSINFO.
/  bit1=0: Use last allocated cluster number in the FSINFO if available.
/  bit1=1: Do not trust last allocated cluster number in the FSINFO.
*/


#define FF_FS_LOCK		0
/* The option FF_FS_LOCK switches file lock function to control duplicated file open
/  and illegal operation to open objects. This option must be 0 when FF_FS_READONLY
/  is 1.
/
/  0:  Disable file lock function. To avoid volume corruption, application program
/      should avoid illegal open, remove and rename to the open objects.
/  >0: Enable file lock function. The value defines how many files/sub-directories
/      can be opened simultaneously under file lock control. Note that the file
/      lock control is independent of re-entrancy. */


/* #include 	// O/S definitions */
#define FF_FS_REENTRANT	0
#define FF_FS_TIMEOUT	1000
#define FF_SYNC_t		HANDLE
/* The option FF_FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs
/  module itself. Note that regardless of this option, file access to different
/  volume is always re-entrant and volume control functions, f_mount(), f_mkfs()
/  and f_fdisk() function, are always not re-entrant. Only file/directory access
/  to the same volume is under control of this function.
/
/   0: Disable re-entrancy. FF_FS_TIMEOUT and FF_SYNC_t have no effect.
/   1: Enable re-entrancy. Also user provided synchronization handlers,
/      ff_req_grant(), ff_rel_grant(), ff_del_syncobj() and ff_cre_syncobj()
/      function, must be added to the project. Samples are available in
/      option/syscall.c.
/
/  The FF_FS_TIMEOUT defines timeout period in unit of time tick.
/  The FF_SYNC_t defines O/S dependent sync object type. e.g. HANDLE, ID, OS_EVENT*,
/  SemaphoreHandle_t and etc. A header file for O/S definitions needs to be
/  included somewhere in the scope of ff.h. */



/*--- End of configuration options ---*/

驱动接口

移植接口文件disk_port.c
主要用于提供FatFs的diskio.c读取、写入、擦除、控制接口，RTC时钟接口（获取秒）

/**
 *  @file disk_port.c
 *
 *  @date 2022年09月27日 11:19:56 星期二
 *
 *  @author aron566
 *
 *  @copyright Copyright (c) 2022 aron566 .
 *
 *  @brief None.
 *
 *  @details None.
 *
 *  @version v1.0.0
 */
/** Includes -----------------------------------------------------------------*/
/* Private includes ----------------------------------------------------------*/
#include "disk_port.h"
#include 
#include "main.h"
#include "RTC_Port.h"
/** Use C compiler -----------------------------------------------------------*/
#ifdef __cplusplus ///< use C compiler
extern "C" {
#endif
/** Private macros -----------------------------------------------------------*/

/** Private typedef ----------------------------------------------------------*/

/** Private constants --------------------------------------------------------*/
/** Public variables ---------------------------------------------------------*/

/** Private function prototypes ----------------------------------------------*/
/**
 * @defgroup SPI FLASH DRIVE FUNC
 * @{
 */
static DSTATUS spi_flash_disk_status(void);
static DSTATUS spi_flash_disk_initialize(void);
static DRESULT spi_flash_disk_read(BYTE *buff, LBA_t sector, UINT count);
static DRESULT spi_flash_disk_write(const BYTE *buff, LBA_t sector, UINT count);
static DRESULT spi_flash_disk_ioctl(BYTE cmd, void *buff);
/** @}*/
/** Public variables ---------------------------------------------------------*/
DISK_DRV_FUNC_MAP_Typedef_t disk_drv_array[DEV_TYPE_MAX] =
{
  [DEV_SPI_FLASH] = {
                      .get_disk_status_port = spi_flash_disk_status,
                      .disk_init_port       = spi_flash_disk_initialize,
                      .disk_read_port       = spi_flash_disk_read,
                      .disk_write_port      = spi_flash_disk_write,
                      .disk_ioctl_port      = spi_flash_disk_ioctl
                    },
};

// osMutexDef_t disk_mutex_array[DEV_TYPE_MAX] = {0};
/** Private user code --------------------------------------------------------*/

/** Private application code -------------------------------------------------*/

/** Private application code -------------------------------------------------*/
/*******************************************************************************
*
*       Static code
*
********************************************************************************
*/

/**
  ******************************************************************
  * @brief   spi磁盘状态读取
  * @param   [in]None
  * @return  1 Drive not initialized 2 No medium in the drive 4 Write protected
  * @author  aron566
  * @version V1.0
  * @date    2020-01-04
  ******************************************************************
  */
static DSTATUS spi_flash_disk_status(void)
{
  sfud_flash_t flash = sfud_get_device(SFUD_GD25Q64C_DEVICE1_INDEX);
  if(flash == NULL)
  {
    return STA_NOINIT;
  }
  uint8_t status;
  sfud_read_status(flash, &status);
	return (DSTATUS)status;
}

/**
  ******************************************************************
  * @brief   spi磁盘初始化
  * @param   [in]None
  * @return  0 OK 1 Drive not initialized 2 No medium in the drive 4 Write protected
  * @author  aron566
  * @version V1.0
  * @date    2020-01-04
  ******************************************************************
  */
static DSTATUS spi_flash_disk_initialize(void)
{
  sfud_flash_t flash = sfud_get_device(SFUD_GD25Q64C_DEVICE1_INDEX);
  if(flash == NULL)
  {
    return STA_NOINIT;
  }
  sfud_err result = sfud_device_init(flash);
  if(result != SFUD_SUCCESS)
  {
    return STA_NOINIT;
  }
	return 0;
}

/**
  ******************************************************************
  * @brief   spi磁盘读取指定扇区数的数据到缓冲区
  * @param   [out]buff 缓冲区
  * @param   [in]sector 起始扇区号
  * @param   [in]count 扇区数
  * @return  0: Successful 1: R/W Error 2: Write Protected 3: Not Ready 4: Invalid Parameter
  * @author  aron566
  * @version V1.0
  * @date    2020-01-04
  ******************************************************************
  */
static DRESULT spi_flash_disk_read(BYTE *buff, LBA_t sector, UINT count)
{
  sfud_flash_t flash = sfud_get_device(SFUD_GD25Q64C_DEVICE1_INDEX);
  if(flash == NULL)
  {
    return RES_PARERR;
  }

  uint8_t status;

  sfud_read_status(flash, &status);

  sfud_err result = sfud_read(flash, sector * FF_MAX_SS, FF_MAX_SS * count, (uint8_t *)buff);
  if(result != SFUD_SUCCESS)
  {
    return RES_ERROR;
  }
	return RES_OK;
}

/**
  ******************************************************************
  * @brief   spi磁盘写入数据到指定扇区数
  * @param   [in]buff
  * @param   [in]sector
  * @param   [in]count
  * @return  0: Successful 1: R/W Error 2: Write Protected 3: Not Ready 4: Invalid Parameter
  * @author  aron566
  * @version V1.0
  * @date    2020-01-04
  ******************************************************************
  */
static DRESULT spi_flash_disk_write(const BYTE *buff, LBA_t sector, UINT count)
{
  sfud_flash_t flash = sfud_get_device(SFUD_GD25Q64C_DEVICE1_INDEX);
  if(flash == NULL)
  {
    return RES_PARERR;
  }

  uint8_t status;

  sfud_read_status(flash, &status);

  if(sfud_erase(flash, sector * FF_MAX_SS, FF_MAX_SS * count) != SFUD_SUCCESS)
  {
    return RES_ERROR;
  }

  sfud_read_status(flash, &status);

  sfud_err result = sfud_write(flash, sector * FF_MAX_SS, FF_MAX_SS * count, (const uint8_t *)buff);
  if(result != SFUD_SUCCESS)
  {
    return RES_ERROR;
  }
	return RES_OK;
}


/**
  ******************************************************************
  * @brief   spi磁盘特殊操作
  * @param   [in]cmd
  * @param   [in]buff
  * @return  0: Successful 1: R/W Error 2: Write Protected 3: Not Ready 4: Invalid Parameter
  * @author  aron566
  * @version V1.0
  * @date    2020-01-04
  ******************************************************************
  */
static DRESULT spi_flash_disk_ioctl(BYTE cmd, void *buff)
{
//#define CTRL_SYNC			0	/* Complete pending write process (needed at FF_FS_READONLY == 0) */
//#define GET_SECTOR_COUNT	1	/* Get media size (needed at FF_USE_MKFS == 1) */
//#define GET_SECTOR_SIZE		2	/* Get sector size (needed at FF_MAX_SS != FF_MIN_SS) */
//#define GET_BLOCK_SIZE		3	/* Get erase block size (needed at FF_USE_MKFS == 1) */
//#define CTRL_TRIM			4	/* Inform device that the data on the block of sectors is no longer used (needed at FF_USE_TRIM == 1) */
  switch(cmd)
  {
    case CTRL_SYNC:

        return RES_OK;
    case GET_SECTOR_COUNT:
        *(DWORD*)buff = 4096 * 4;/**< PAGE SIZE:256,SECTOR SIZE:4KB,BLOCK SIZE:32/64KB,GD25Q64C TOTOAL SIZE:512*16KB*/
        return RES_OK;
    case GET_SECTOR_SIZE:
        *(DWORD*)buff = FF_MAX_SS;/**< if use 512Byte then erase size is 2 PAGE SIZE, if use 4KB then erase size is 1 SECTOR SIZE.*/
        return RES_OK;
    case GET_BLOCK_SIZE:
        *(DWORD*)buff = 1;/**< 擦除扇区的最小个数(1*512Byte = 2 PAGE SIZE),per 32K/64K block size to erase*/
        return RES_OK;
    case CTRL_TRIM:
        return RES_PARERR;/**< 通知扇区数据不使用--未开启功能*/
    default:
        break;
  }
	return RES_PARERR;
}
/** Public application code --------------------------------------------------*/
/*******************************************************************************
*
*       Public code
*
********************************************************************************
*/


/** Public application code --------------------------------------------------*/
/*******************************************************************************
*
*       Public code
*
********************************************************************************
*/
/**
  ******************************************************************
  * @brief   获取当前时间秒数
  * @param   [in]None
  * @return  s
  * @author  aron566
  * @version V1.0
  * @date    2020-01-04
  ******************************************************************
  */
DWORD disk_get_rtc_time_s(void)
{
  return (DWORD)RTC_Port_Get_TimeStamp();
}

#ifdef __cplusplus ///
}
#endif
/******************************** End of file *********************************/

disk_port.h

/**
 *  @file disk_port.h
 *
 *  @date 2022年09月27日 11:20:15 星期二
 *
 *  @author Copyright (c) 2022 aron566 .
 *
 *  @brief FatFs驱动接口.
 *
 *  @version v1.0.0
 */
#ifndef _DISK_PORT_H
#define _DISK_PORT_H
/** Includes -----------------------------------------------------------------*/
#include  /**< need definition of uint8_t */
#include  /**< need definition of NULL    */
#include /**< need definition of BOOL    */
#include   /**< if need printf             */
#include 
#include 
// #include  /**< need variable max value    */
// #include  /**< need alignof    */
// #include  /**< need va_start    */
/** Private includes ---------------------------------------------------------*/

#include "ff.h"
#include "diskio.h"
/** Use C compiler -----------------------------------------------------------*/
#ifdef __cplusplus ///< use C compiler
extern "C" {
#endif
/** Private defines ----------------------------------------------------------*/

/** Exported typedefines -----------------------------------------------------*/
/** Exported constants -------------------------------------------------------*/

/** Exported macros-----------------------------------------------------------*/
/** Exported variables -------------------------------------------------------*/
/** Exported functions prototypes --------------------------------------------*/
/* 磁盘状态读取 */
typedef DSTATUS(*pdisk_status_func)(void);

/* 磁盘初始化 */
typedef DSTATUS(*pdisk_initialize_func)(void);

/* 磁盘读取数据 */
typedef DRESULT(*pdisk_read_func)(
  BYTE *buff,		/* Data buffer to store read data */
  LBA_t sector,	/* Start sector in LBA */
  UINT count		/* Number of sectors to read */
);

/* 磁盘写入数据 */
typedef DRESULT (*pdisk_write_func)(
  const BYTE *buff,	/* Data to be written */
  LBA_t sector,		/* Start sector in LBA */
  UINT count			/* Number of sectors to write */
);

/* 磁盘控制 */
typedef DRESULT (*pdisk_ioctl_func)(
  BYTE cmd,		/* Control code */
  void *buff		/* Buffer to send/receive control data */
);

typedef struct disk_drv
{
  pdisk_status_func get_disk_status_port;
  pdisk_initialize_func disk_init_port;
  pdisk_read_func disk_read_port;
  pdisk_write_func disk_write_port;
  pdisk_ioctl_func disk_ioctl_port;
}DISK_DRV_FUNC_MAP_Typedef_t;
/** Exported constants -------------------------------------------------------*/

/** Exported macros-----------------------------------------------------------*/
/* Definitions of physical drive number for each drive */
#define DEV_RAM		0	/* Example: Map Ramdisk to physical drive 0 */
#define DEV_MMC		1	/* Example: Map MMC/SD card to physical drive 1 */
#define DEV_USB		2	/* Example: Map USB MSD to physical drive 2 */
#define DEV_SPI_FLASH 3 /* Example: Map SPI flash to physical drive 3 */
#define DEV_TYPE_MAX (DEV_SPI_FLASH + 1)
/** Exported variables -------------------------------------------------------*/
extern DISK_DRV_FUNC_MAP_Typedef_t disk_drv_array[DEV_TYPE_MAX];/**< 磁盘设备驱动接口 */

// extern osMutexDef_t disk_mutex_array[DEV_TYPE_MAX];/**< 磁盘同步锁 */
/** Exported functions prototypes --------------------------------------------*/

/**
 * @brief 获取RTC时间戳
 *
 * @return DWORD
 */
DWORD disk_get_rtc_time_s(void);

#ifdef __cplusplus ///
}
#endif
#endif
/******************************** End of file *********************************/

diskio.c修改如下：

/*-----------------------------------------------------------------------*/
/* Low level disk I/O module SKELETON for FatFs     (C)ChaN, 2019        */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be        */
/* attached to the FatFs via a glue function rather than modifying it.   */
/* This is an example of glue functions to attach various exsisting      */
/* storage control modules to the FatFs module with a defined API.       */
/*-----------------------------------------------------------------------*/

#include "ff.h"      /* Obtains integer types */
#include "diskio.h"    /* Declarations of disk functions */
#include "disk_port.h"

/* Definitions of physical drive number for each drive */
// #define DEV_RAM    0  /* Example: Map Ramdisk to physical drive 0 */
// #define DEV_MMC    1  /* Example: Map MMC/SD card to physical drive 1 */
// #define DEV_USB    2  /* Example: Map USB MSD to physical drive 2 */


/*-----------------------------------------------------------------------*/
/* Get Drive Status                                                      */
/*-----------------------------------------------------------------------*/

DSTATUS disk_status (
  BYTE pdrv    /* Physical drive nmuber to identify the drive */
)
{
  switch (pdrv) {
  case DEV_RAM :
  case DEV_MMC :
  case DEV_USB :
  case DEV_SPI_FLASH:
    return disk_drv_array[pdrv].get_disk_status_port();
  }
  return STA_NOINIT;
}



/*-----------------------------------------------------------------------*/
/* Inidialize a Drive                                                    */
/*-----------------------------------------------------------------------*/

DSTATUS disk_initialize (
  BYTE pdrv        /* Physical drive nmuber to identify the drive */
)
{
  switch (pdrv) {
  case DEV_RAM :
  case DEV_MMC :
  case DEV_USB :
  case DEV_SPI_FLASH:
    return disk_drv_array[pdrv].disk_init_port();
  }
  return STA_NOINIT;
}



/*-----------------------------------------------------------------------*/
/* Read Sector(s)                                                        */
/*-----------------------------------------------------------------------*/

DRESULT disk_read (
  BYTE pdrv,    /* Physical drive nmuber to identify the drive */
  BYTE *buff,    /* Data buffer to store read data */
  LBA_t sector,  /* Start sector in LBA */
  UINT count    /* Number of sectors to read */
)
{
  switch (pdrv) {
  case DEV_RAM :
  case DEV_MMC :
  case DEV_USB :
  case DEV_SPI_FLASH:
    return disk_drv_array[pdrv].disk_read_port(buff, sector, count);
  }

  return RES_PARERR;
}



/*-----------------------------------------------------------------------*/
/* Write Sector(s)                                                       */
/*-----------------------------------------------------------------------*/

#if FF_FS_READONLY == 0

DRESULT disk_write (
  BYTE pdrv,      /* Physical drive nmuber to identify the drive */
  const BYTE *buff,  /* Data to be written */
  LBA_t sector,    /* Start sector in LBA */
  UINT count      /* Number of sectors to write */
)
{
  switch (pdrv) {
  case DEV_RAM :
  case DEV_MMC :
  case DEV_USB :
  case DEV_SPI_FLASH:
    return disk_drv_array[pdrv].disk_write_port(buff, sector, count);
  }

  return RES_PARERR;
}
#endif


/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions                                               */
/*-----------------------------------------------------------------------*/

DRESULT disk_ioctl (
  BYTE pdrv,    /* Physical drive nmuber (0..) */
  BYTE cmd,    /* Control code */
  void *buff    /* Buffer to send/receive control data */
)
{
  switch (pdrv) {
  case DEV_RAM :
  case DEV_MMC :
  case DEV_USB :
  case DEV_SPI_FLASH:
    return disk_drv_array[pdrv].disk_ioctl_port(cmd, buff);
  }

  return RES_PARERR;
}

DWORD get_fattime (void)
{
  return disk_get_rtc_time_s();
}

FatFs测试

以上配置没问题的话可以用以下代码进行测试验证

static BYTE work[FF_MAX_SS];/**< 挂载工作内存,不可放入线程,占用内存太大 */
static FATFS fsobject;/**< 磁盘挂载对象,不可放入线程,占用内存太大 */
static FIL fp;/**< 文件对象,不可放入线程,占用内存太大 */
/**
 * @brief 测试fatfs
 *
 */
static void FatFs_Test_Code(void)
{
  /* 挂载文件系统, "3:"就是挂载的设备号为3 SPI的设备,1立即执行挂载 */
  FRESULT res;
  res = f_mount(&fsobject, "3:",  1);

  /* 没有文件系统进行格式化 */
  if(res == FR_NO_FILESYSTEM)
  {
    printf("FR_NO_FILESYSTEM\r\n");
    res = f_mkfs("3:", 0, work, sizeof(work));
    printf("f_mkfs  is  over\r\n");
    printf("res = %d\r\n", res);
    res = f_mount(NULL, "3:", 1);/**< 取消文件系统 */
    res = f_mount(&fsobject, "3:", 1);/**< 挂载文件系统 */
  }

  if(FR_OK != res)
  {
    printf("f_mount error.\r\n");
    return;
  }

  /* 尝试打开文件 */
  res = f_open(&fp, "3:/test.txt", FA_CREATE_NEW|FA_WRITE|FA_READ);
  if(res)
  {
    if(res == FR_EXIST)
    {
      printf("the file is existed.\r\n");
      res = f_open(&fp, "3:/test.txt", FA_WRITE|FA_READ);
    }
  }
  else
  {
    printf("f_open file ok.\r\n");
  }
  if(FR_OK != res)
  {
    printf("f_open error.\r\n");
    return;
  }

  /* 读取文件大小 */
  FSIZE_t fsize;
  fsize = f_size(&fp);
  if(0 < fsize)
  {
    printf("file size:%llu Bytes.\r\n", fsize);
    BYTE buf[50];
    memset(buf, 0, 50);
    f_lseek(&fp, 0);
    UINT read_size;
    res = f_read(&fp, buf, fsize > 50 ? 50 : fsize, &read_size);
    if(res == FR_OK)
    {
      printf("read file ok!\r\n");
      printf("read size:%d Bytes.\r\n", read_size);
    }
    else
    {
      printf("read file faild!\r\n");
    }
    printf("\n%s\n", buf);
  }
  else
  {
    /* write a message */
    UINT write_size;
    res = f_write(&fp, "Hello,World!", 12, &write_size);
    if(write_size == 12)
    {
      printf("write ok!\r\n");
    }
    else
    {
      printf("write faild!\r\n");
    }
  }

  /* 关闭文件 */
  f_close(&fp);
}

USB MSC驱动接口完善

usbd_storage_if.c

#define STORAGE_LUN_NBR                  1
#define STORAGE_BLK_NBR                  (4096*4) //8MB总大小(8*1024*1024)/512 
#define STORAGE_BLK_SIZ                  512 //定义的扇区大小

读写接口完善即可

/**
  * @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 */
  UNUSED(lun);
  // UNUSED(buf);
  // UNUSED(blk_addr);
  // UNUSED(blk_len);
  if(disk_drv_array[DEV_SPI_FLASH].disk_read_port(buf, blk_addr, blk_len) != RES_OK)
  {
    printf("read blk_addr %u blk_len %u error.\r\n", blk_addr, blk_len);
  }
  return (USBD_OK);
  /* 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 */
  UNUSED(lun);
  // UNUSED(buf);
  // UNUSED(blk_addr);
  // UNUSED(blk_len);
  if(disk_drv_array[DEV_SPI_FLASH].disk_write_port(buf, blk_addr, blk_len) != RES_OK)
  {
    printf("write blk_addr %u blk_len %u error.\r\n", blk_addr, blk_len);
  }
  return (USBD_OK);
  /* USER CODE END 7 */
}