STM32F7xx —— FatFS（W25QXX）

看本章之前请务必先食用：动态内存管理 W25QXX读写

使用经典的fatfs1.4.1，下载源码，和我们用户相关的式diskio.c，实现里面的初始化读写和ioctl。ffconf.h用来配置，很容易看懂，不再细说了。后面写了一个测试例子，能读写成功就说明没问题了。Fatfs对文件的操作与Linux文件操作基本类似，会使用就行，想弄清楚实现要深入学习fatfs的文件结构。

/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2016        */
/*-----------------------------------------------------------------------*/
/* 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 "diskio.h"     /* FatFs lower layer API */
#include "global.h"// 前24M字节给fatfs用   剩余部分,给自己用
#define FLASH_SECTOR_SIZE   512
#define FLASH_SECTOR_COUNT  1024*25*2 // W25Q256,前25M字节给FATFS占用
#define FLASH_BLOCK_SIZE    8         // 每个BLOCK有8个扇区    // 获得磁盘状态
DSTATUS disk_status(BYTE pdrv   /* Physical drive nmuber to identify the drive */
)
{return RES_OK;
}//初始化磁盘
DSTATUS disk_initialize(BYTE pdrv       /* Physical drive nmuber to identify the drive */
)
{W25QXXInit();return 0;
}// 读扇区
// pdrv:磁盘编号0~9
DRESULT disk_read(BYTE pdrv,    /* Physical drive nmuber to identify the drive */BYTE *buff,   /* Data buffer to store read data */DWORD sector, /* Sector address in LBA */UINT count    /* Number of sectors to read */
)
{if(!count){return RES_PARERR;}for(; count > 0; count--){W25QXXRead(sector * FLASH_SECTOR_SIZE, buff, FLASH_SECTOR_SIZE);sector++;buff += FLASH_SECTOR_SIZE;}return RES_OK;
}// 写扇区
// pdrv:磁盘编号0~9
// *buff:发送数据首地址
// sector:扇区地址
// count:需要写入的扇区数
DRESULT disk_write(BYTE pdrv,      /* Physical drive nmuber to identify the drive */const BYTE *buff, /* Data to be written */DWORD sector,   /* Sector address in LBA */UINT count      /* Number of sectors to write */
)
{if(!count){return RES_PARERR;  // count不能等于0，否则返回参数错误}for(; count > 0; count--){W25QXXWrite(sector * FLASH_SECTOR_SIZE, (uint8_t *)buff, FLASH_SECTOR_SIZE);sector++;buff += FLASH_SECTOR_SIZE;}return RES_OK;
}// 其他表参数的获得
// pdrv:磁盘编号0~9
// ctrl:控制代码
// *buff:发送/接收缓冲区指针
DRESULT disk_ioctl(BYTE pdrv,    /* Physical drive nmuber (0..) */BYTE cmd,   /* Control code */void *buff    /* Buffer to send/receive control data */
)
{DRESULT res;switch(cmd){case CTRL_SYNC:res = RES_OK;break;case GET_SECTOR_SIZE:*(WORD*)buff = FLASH_SECTOR_SIZE;res = RES_OK;break;case GET_BLOCK_SIZE:*(WORD*)buff = FLASH_BLOCK_SIZE;res = RES_OK;break;case GET_SECTOR_COUNT:*(DWORD*)buff = FLASH_SECTOR_COUNT;res = RES_OK;break;default:res = RES_PARERR;break;}return res;
}// 获得时间
// User defined function to give a current time to fatfs module      */
// 31-25: Year(0-127 org.1980), 24-21: Month(1-12), 20-16: Day(1-31) */
// 15-11: Hour(0-23), 10-5: Minute(0-59), 4-0: Second(0-29 *2) */
DWORD get_fattime(void)
{return 0;
}// 动态分配内存
void *ff_memalloc(UINT size)
{return (void *)MemAlloc(SRAM_TYPE_IN, size);
}// 释放内存
void ff_memfree(void *mf)
{MemFree(SRAM_TYPE_IN, mf);
}

/*---------------------------------------------------------------------------/
/  FatFs - FAT file system module configuration file  R0.12  (C)ChaN, 2016
/---------------------------------------------------------------------------*/#define _FFCONF 88100 /* Revision ID *//*---------------------------------------------------------------------------/
/ Function Configurations
/---------------------------------------------------------------------------*/#define _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 _FS_MINIMIZE   0
/* This option defines minimization level to remove some basic API functions.
/
/   0: All basic functions are 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    _USE_STRFUNC    1
/* This option switches string functions, f_gets(), f_putc(), f_puts() and
/  f_printf().
/
/  0: Disable string functions.
/  1: Enable without LF-CRLF conversion.
/  2: Enable with LF-CRLF conversion. */#define _USE_FIND       0
/* This option switches filtered directory read functions, f_findfirst() and
/  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */#define   _USE_MKFS       1
/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */#define    _USE_FASTSEEK   1
/* This option switches fast seek function. (0:Disable or 1:Enable) */#define   _USE_EXPAND     0
/* This option switches f_expand function. (0:Disable or 1:Enable) */#define _USE_CHMOD     0
/* This option switches attribute manipulation functions, f_chmod() and f_utime().
/  (0:Disable or 1:Enable) Also _FS_READONLY needs to be 0 to enable this option. */#define _USE_LABEL      1
/* This option switches volume label functions, f_getlabel() and f_setlabel().
/  (0:Disable or 1:Enable) */#define    _USE_FORWARD    0
/* This option switches f_forward() function. (0:Disable or 1:Enable)
/  To enable it, also _FS_TINY need to be 1. *//*---------------------------------------------------------------------------/
/ Locale and Namespace Configurations
/---------------------------------------------------------------------------*/#define _CODE_PAGE    936     //采用中文GBK编码
/* This option specifies the OEM code page to be used on the target system.
/  Incorrect setting of the code page can cause a file open failure.
/
/   1   - ASCII (No extended character. Non-LFN cfg. only)
/   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)
*/#define   _USE_LFN    3
#define _MAX_LFN    255
/* The _USE_LFN switches the support of long file name (LFN).
/
/   0: Disable support of LFN. _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, Unicode handling functions (option/unicode.c) must be added
/  to the project. The working buffer occupies (_MAX_LFN + 1) * 2 bytes and
/  additional 608 bytes at exFAT enabled. _MAX_LFN can be in range from 12 to 255.
/  It should be set 255 to support full featured LFN operations.
/  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(), must be added to the project. */#define    _LFN_UNICODE    0
/* This option switches character encoding on the API. (0:ANSI/OEM or 1:Unicode)
/  To use Unicode string for the path name, enable LFN and set _LFN_UNICODE = 1.
/  This option also affects behavior of string I/O functions. */#define _STRF_ENCODE    0
/* When _LFN_UNICODE == 1, this option selects the character encoding on the file to
/  be read/written via string I/O functions, f_gets(), f_putc(), f_puts and f_printf().
/
/  0: ANSI/OEM
/  1: UTF-16LE
/  2: UTF-16BE
/  3: UTF-8
/
/  This option has no effect when _LFN_UNICODE == 0. */#define _FS_RPATH  0
/* This option configures support of 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 _VOLUMES  3   //支持3个磁盘
/* Number of volumes (logical drives) to be used. */#define _STR_VOLUME_ID  0
#define _VOLUME_STRS    "RAM","NAND","CF","SD1","SD2","USB1","USB2","USB3"
/* _STR_VOLUME_ID switches string support of volume ID.
/  When _STR_VOLUME_ID is set to 1, also pre-defined strings can be used as drive
/  number in the path name. _VOLUME_STRS defines the drive ID strings for each
/  logical drives. Number of items must be equal to _VOLUMES. Valid characters for
/  the drive ID strings are: A-Z and 0-9. */#define _MULTI_PARTITION    0
/* This option switches support of multi-partition on a 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 multi-partition 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    _MIN_SS     512
#define _MAX_SS     512
/* These options configure the range of sector size to be supported. (512, 1024,
/  2048 or 4096) Always set both 512 for most systems, all type of memory cards and
/  harddisk. But a larger value may be required for on-board flash memory and some
/  type of optical media. When _MAX_SS is larger than _MIN_SS, FatFs is configured
/  to variable sector size and GET_SECTOR_SIZE command must be implemented to the
/  disk_ioctl() function. */#define _USE_TRIM   0
/* This option switches support of ATA-TRIM. (0:Disable or 1:Enable)
/  To enable Trim function, also CTRL_TRIM command should be implemented to the
/  disk_ioctl() function. */#define _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.
*//*---------------------------------------------------------------------------/
/ System Configurations
/---------------------------------------------------------------------------*/#define   _FS_TINY    0
/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)
/  At the tiny configuration, size of the file object (FIL) is reduced _MAX_SS bytes.
/  Instead of private sector buffer eliminated from the file object, common sector
/  buffer in the file system object (FATFS) is used for the file data transfer. */#define _FS_EXFAT 1
/* This option switches support of exFAT file system in addition to the traditional
/  FAT file system. (0:Disable or 1:Enable) To enable exFAT, also LFN must be enabled.
/  Note that enabling exFAT discards C89 compatibility. */#define _FS_NORTC 0
#define _NORTC_MON  3
#define _NORTC_MDAY 1
#define _NORTC_YEAR 2016
/* The option _FS_NORTC switches timestamp functiton. If the system does not have
/  any RTC function or valid timestamp is not needed, set _FS_NORTC = 1 to disable
/  the timestamp function. All objects modified by FatFs will have a fixed timestamp
/  defined by _NORTC_MON, _NORTC_MDAY and _NORTC_YEAR in local time.
/  To enable timestamp function (_FS_NORTC = 0), get_fattime() function need to be
/  added to the project to get current time form real-time clock. _NORTC_MON,
/  _NORTC_MDAY and _NORTC_YEAR have no effect.
/  These options have no effect at read-only configuration (_FS_READONLY = 1). */#define   _FS_LOCK    0
/* The option _FS_LOCK switches file lock function to control duplicated file open
/  and illegal operation to open objects. This option must be 0 when _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. */#define _FS_REENTRANT  0
#define _FS_TIMEOUT     1000
#define _SYNC_t         HANDLE
/* The option _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. _FS_TIMEOUT and _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 _FS_TIMEOUT defines timeout period in unit of time tick.
/  The _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.c. *//*--- End of configuration options ---*/

#if (CONFIG_FATFS_TEST == 1)
static uint8_t vbuffer[100] = {0};
static void fatfs_test(void)
{uint8_t res;FATFS *fat = (FATFS *)MemAlloc(SRAM_TYPE_IN, sizeof(FATFS));FIL *fs = (FIL *)MemAlloc(SRAM_TYPE_IN, sizeof(FIL));UINT rw;uint8_t *buffer = (uint8_t *)MemAlloc(SRAM_TYPE_IN, 512), i;WarpInit();res = f_mount(fat, "1:", 1);if(res == 0x0D){printf("Fmount 0x0D....\r\n");res = f_mkfs("1:", 1, 4096);if(res != 0){printf("f_mkfs fail....\r\n");}}res = f_open(fs, "1:MMMM.txt", FA_OPEN_ALWAYS | FA_WRITE | FA_READ);if(res != FR_OK){printf("mf_open fail...\r\n");}f_write(fs, "bbbbbbAAAAbbb", strlen("bbbbbbAAAAbbb"));f_close(fs);res = f_open(fs, "1:MMMM.txt", FA_READ);if(res != FR_OK){printf("mf_open fail...\r\n");}f_read(fs, buffer, strlen("bbbbbbAAAAbbb"));memcpy(vbuffer, buffer, strlen("bbbbbbAAAAbbb"));printf("vffer: %s\r\n", vbuffer);f_close(fs);
}
#endif

上面的例子是直接使用了ff.h中的函数，我们也可以创建一个文件，使用包裹函数封装ff.h中的函数，我们只使用包裹函数中的函数。

STM32F7xx —— FatFS（W25QXX）相关推荐

使用 STM32 的 SPI 来读取外部 SPI FLASH 芯片（W25Qxx）
SPI简介 SPI 是英语 Serial Peripheral interface 的缩写,顾名思义就是串行外围设备接口.是 Motorola 首先在其 MC68HCXX 系列处理器上定义的.SPI ...
STM32CubeMX学习笔记（25）——FatFs文件系统使用（操作SPI Flash）
一.FatFs简介 FatFs 是面向小型嵌入式系统的一种通用的 FAT 文件系统.它完全是由 ANSI C 语言编写并且完全独立于底层的 I/O 介质.因此它可以很容易地不加修改地移植到其他的处理器 ...
说说FATFS文件系统（转）
说说FATFS文件系统(转) FATFS是一个为小型嵌入式系统设计的通用FAT(File Allocation Table)文件系统模块.FatFs 的编写遵循ANSI C,并且完全与磁盘I/O层分开 ...
Stm32文件系统FATFS（开始于2021-09-09）
Stm32文件系统FATFS 参考资料主要是原子和野火两家的讲解. 1.FATFS简介: 适合嵌入式小型单片机,是一个独立的软件层文件系统,我们只需要将底层硬件的读取函数移植到FATFS提供的向下 ...
FatFS文件系统的使用（STM32）
目录 1.Fatfs相关文件 2.驱动测试 3.重试机制 4.实现较为复杂的文件操作 4.1 获取磁盘容量 4.2 遍历目录,获取文件大小和数量,以及查找\删除等操作 4.3 认识文件权限和错误码 1 ...
基于STM32采用CS创世 SD NAND(贴片SD卡)完成FATFS文件系统移植与测试（中篇）
3.2 SPI硬件时序方式上面的3.1小节是采用SPI模拟时序驱动SD NAND,STM32本身集成有SPI硬件模块,可以直接利用STM32硬件SPI接口读写. 下面贴出底层的适配代码. 上面贴出的 ...
使用vscode + gcc进行 STM32 单片机开发（三）DMA读写SD卡，移植FATFS文件系统
背景在本系列的前两篇文章( 使用vscode + gcc进行 STM32 单片机开发(一)编译及调试使用vscode + gcc进行 STM32 单片机开发(二)gcc环境移植rtthread) ...
STM32CubeMX学习笔记（27）——FatFs文件系统使用（操作SD卡）
一.FatFs简介 FatFs 是面向小型嵌入式系统的一种通用的 FAT 文件系统.它完全是由 ANSI C 语言编写并且完全独立于底层的 I/O 介质.因此它可以很容易地不加修改地移植到其他的处理器 ...

STM32F7xx —— FatFS（W25QXX）

STM32F7xx —— FatFS（W25QXX）

STM32F7xx —— FatFS（W25QXX）相关推荐

最新文章

热门文章