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 = 1/2makes 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 <somertos.h> // 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 <aron566@163.com>.**  @brief None.**  @details None.**  @version v1.0.0*/
/** Includes -----------------------------------------------------------------*/
/* Private includes ----------------------------------------------------------*/
#include "disk_port.h"
#include <sfud.h>
#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 ///<end extern c
}
#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 <aron566@163.com>.**  @brief FatFs驱动接口.**  @version v1.0.0*/
#ifndef _DISK_PORT_H
#define _DISK_PORT_H
/** Includes -----------------------------------------------------------------*/
#include <stdint.h> /**< need definition of uint8_t */
#include <stddef.h> /**< need definition of NULL    */
#include <stdbool.h>/**< need definition of BOOL    */
#include <stdio.h>  /**< if need printf             */
#include <stdlib.h>
#include <string.h>
// #include <limits.h> /**< need variable max value    */
// #include <stdalign.h> /**< need alignof    */
// #include <stdarg.h> /**< 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 ///<end extern c
}
#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 == 0DRESULT 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 */
}

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