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说在开头
本文是接上一篇文章后的学习笔记，上一篇推文主要介绍了SDIO的知识、如何使用SDIO驱动SD卡、SD卡数据读写。本文则主要介绍如何移植FATFS以及相关API的使用。其中我觉得最值得一看的就是如何遍历读取SD卡的文件名称及内容。
上一篇文章的链接在这：STM32F4单片机SDIO驱动SD卡-CSDN博客
1、下载源码
下载地址为：http://elm-chan.org/fsw/ff/archives.html，这里使用的是FATFS-R0.14版本，但我也下载了FATFS-R0.14a和FATFS-R0.14b源码，对比后内容大差不差。下载后解压，真正的源码是“source”文件夹里的7个c/h文件，文件的作用如下：
2、复制源码
在工程根目录新建“Middlewares/Third_Party/FATFS-R0.14”文件夹，并将FATFS的7个源码文件复制到新建的文件夹中。
3、导入源码
打开工程，添加FATFS源码文件进工程，同时添加编译路径。
4、配置FATFS
修改ffcon.h文件，自定义相关配置，这里张贴出我使用的配置以及相关的注释
/*---------------------------------------------------------------------------/
/ FatFs Functional Configurations
/---------------------------------------------------------------------------*/#define FFCONF_DEF 86606 /* Revision ID *//*---------------------------------------------------------------------------/
/ Function Configurations
/---------------------------------------------------------------------------*/#define FF_FS_READONLY 0
/*是否以只读的方式运行FATFS，如果读写都要用就将值设为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_STRFUNC 2
//#define FF_PRINT_LLI 0
//#define FF_PRINT_FLOAT 0
/*这个用来设置是否支持字符串类操作，比如f_putc，f_puts等0: Disable string functions.不启用字符串操作1: Enable without LF-CRLF conversion.启用无低频-CRLF转换2: Enable with LF-CRLF conversion. 启用带低频-CRLF转换
*/#define FF_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 FF_USE_MKFS 1
/* 用来定义是否使能格式化 */#define FF_USE_FASTSEEK 1
/* 用来使能快速搜索功能(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 1
/* 用来设置是否支持磁盘盘符（磁盘名字）读取与设置。 f_getlabel() and f_setlabel(). */#define FF_USE_FORWARD 0
/* This option switches f_forward() function. (0:Disable or 1:Enable) *//*---------------------------------------------------------------------------/
/ Locale and Namespace Configurations
/---------------------------------------------------------------------------*/#define FF_CODE_PAGE 936
/* 个用于设置语言编码类型。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 2
#define FF_MAX_LFN 255
/* 用于设置是否支持长文件名,0:表示不支持长文件名，1~3 是支持长文件名，但是存储地方不一样.
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_STRF_ENCODE 3
/* When FF_LFN_UNICODE >= 1 with LFN enabled, string I/O functions, f_gets(),
/ f_putc(), f_puts and f_printf() convert the character encoding in it.
/ This option 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
*/#define FF_FS_RPATH 0
/* 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 1
/* 用于设置 FATFS 支持的磁盘设备数目 (1-10) */#define FF_STR_VOLUME_ID 0
#define FF_VOLUME_STRS "RAM","NAND","CF","SD","SD2","USB","USB2","USB3"
/* 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
/*扇区缓冲的最小值，一般设置为 512*/
#define FF_MAX_SS 512
/*扇区缓冲的最大值，一般设置为 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
/* 这个选项用于设置是否支持64-bit LBA，如果要支持那FF_FS_EXFAT也必须使能；STM32F4的SDIO接口不支持超过32G的卡，FF_FS_EXFAT必须为0，所以此项必须为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
/* 只有使能FF_LBA64才有效；STM32F4的SDIO接口不支持超过32G的卡，FF_FS_EXFAT和FF_LBA64必须为0，所以此项无意义
Minimum number of sectors to switch GPT format to create partition 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
/*是否使用缩小版的FATFS
*/
/* 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 0
/* 用来设置是否使用exFAT文件系统，用于支持容量大于32G的SD卡。STM32F4的SDIO接口不支持超过32G的卡，所以此项必须为0
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 2019
/* 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 NULL
/* 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 ---*/
5、修改diskio.c文件
这里也张贴出我参考正点原子修改后的代码
/*-----------------------------------------------------------------------*/
/* 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 "sdio.h"/* 驱动器宏定义 */
#define SD_Card 0 /* Example: Map Ramdisk to physical drive 0 *//*-----------------------------------------------------------------------*/
/* 获取驱动器的状态 ，可以直接返回RES_OK */
/*-----------------------------------------------------------------------*/DSTATUS disk_status (BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{return RES_OK;;
}/*-----------------------------------------------------------------------*/
/* 磁盘初始化 */
/*-----------------------------------------------------------------------*/DSTATUS disk_initialize (BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{uint8_t ret = 0;switch (pdrv) {case SD_Card :ret = MX_SDIO_SD_Init();//SD卡初始化break;}if(ret) return STA_NOINIT;else return 0;
}/*-----------------------------------------------------------------------*/
/* Read Sector(s) * @brief 读扇区* @param pdrv : 磁盘编号0~9* @param buff : 数据接收缓冲首地址* @param sector : 扇区地址* @param count : 需要读取的扇区数* @retval 无*/
/*-----------------------------------------------------------------------*/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 */
)
{uint8_t ret = 0;if(!count) return RES_PARERR;//读取扇区的数量不能为0switch (pdrv) {case SD_Card :{ret = sd_read_disk(buff, sector, count);//如果读取失败就将SD卡重新初始化while(ret){MX_SDIO_SD_Init();//SD卡初始化ret = sd_read_disk(buff, sector, count);}break; }default :ret = 1;}if(ret == 0) return RES_OK;else return RES_ERROR;
}/*-----------------------------------------------------------------------*/
/* 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 */
)
{uint8_t ret = 0;if(!count) return RES_PARERR;//读取扇区的数量不能为0switch (pdrv) {case SD_Card :{ret = sd_write_disk((uint8_t *)buff, sector, count);//如果读取失败就将SD卡重新初始化while(ret){MX_SDIO_SD_Init();//SD卡初始化ret = sd_write_disk((uint8_t *)buff, sector, count);}break; }default :ret = 1;}if(ret == 0) return RES_OK;else return RES_ERROR;
}#endif/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions * @brief 获取其他控制参数* @param pdrv : 磁盘编号0~9* @param ctrl : 控制代码* @param buff : 发送/接收缓冲区指针* @retval 无*/
/*-----------------------------------------------------------------------*/DRESULT disk_ioctl (BYTE pdrv, /* Physical drive nmuber (0..) */BYTE cmd, /* Control code */void *buff /* Buffer to send/receive control data */
)
{DRESULT res = RES_PARERR;if(pdrv == SD_Card){switch (cmd) {case CTRL_SYNC:res = RES_OK;break;case GET_SECTOR_SIZE://获取扇区的大小*(DWORD *)buff = 512;res = RES_OK;break;case GET_BLOCK_SIZE://获取块大小*(WORD *)buff = sd_card_info_handle.LogBlockSize;res = RES_OK;break;case GET_SECTOR_COUNT://获取扇区的数量*(DWORD *)buff = sd_card_info_handle.LogBlockNbr;res = RES_OK;break;default:res = RES_PARERR;break;} }return res;
}/*** @brief 获得时间* @param 无* @retval 时间* @note 时间编码规则如下:* 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;
}
6、FATFS的使用
这里我就直接贴代码了，里面有详细的注释
/*以下代码放在main.c文件开头*/
#include "ff.h"/*目录深度链表，每打开一个目录就新建一个节点，每关闭一个目录就删除一个节点*/
typedef struct _dir_list_
{struct _dir_list_ *next;uint8_t dir_name[30];//文件夹名称
}Dir_list;uint8_t deep_count = 0;//记录当前的深度
FATFS fs[FF_VOLUMES]; //创建磁盘对象结构体，有几个磁盘就创建几个结构体
FILINFO file_infos = { NULL };//一个用于存储文件信息的结构体变量
Dir_list *dir_lists = { NULL };//文件夹列表/*** @brief 获取磁盘剩余容量* @param pdrv : 磁盘编号("0:"~"9:")* @param total: 总容量 (KB)* @param free : 剩余容量 (KB)* @retval 0, 正常; 其他, 错误代码*/
uint8_t exfuns_get_free(uint8_t *pdrv, uint32_t *total, uint32_t *free)
{FATFS *fs1;uint8_t res;uint32_t fre_clust = 0, fre_sect = 0, tot_sect = 0;/* 得到磁盘信息及空闲簇数量 */res = (uint32_t)f_getfree((const TCHAR *)pdrv, (DWORD *)&fre_clust, &fs1);if (res == 0){tot_sect = (fs1->n_fatent - 2) * fs1->csize; /* 得到总扇区数 */fre_sect = fre_clust * fs1->csize; /* 得到空闲扇区数 */#if FF_MAX_SS!=512 /* 扇区大小不是512字节,则转换为512字节 */tot_sect *= fs1->ssize / 512;fre_sect *= fs1->ssize / 512;
#endif*total = tot_sect >> 1; /* 单位为KB */*free = fre_sect >> 1; /* 单位为KB */}return res;
}/**********************************************************************************************
函数功能：获取文件内容
入口参数：Path：文件完整路径mode：打开文件的模式，可选值有FA_READ、FA_WRITE、FA_CREATE_NEW等
返回值：无
**********************************************************************************************/
void Get_file_date(TCHAR *Path, uint8_t mode)
{uint32_t file_len = 0;//获取文件大小uint8_t *file_date = 0;//储存文件内容uint16_t i = 0;uint32_t br = 0;FIL files = { NULL };//一个用于指向文件的结构体if(f_open(&files, Path, mode) == FR_OK)//打开文件{file_len = f_size(&files);//获取文件长度printf("open %s succeed, file len = %d\n", Path, file_len);file_date = malloc(file_len);//为读取文件内容分配内存for(i=0;i<(file_len/512);i++){if(f_read(&files, &file_date[i*512], 512, &br) != FR_OK){printf("read %s failed \n",Path);break;}}if(file_len%512){if(f_read(&files, &file_date[i*512], (file_len%512), &br) != FR_OK){printf("read %s failed \n",Path);} }f_close(&files);//关闭文件printf("file date:");HAL_UART_Transmit(&huart1, file_date, file_len, 1000);//打印文件内容printf("\r\n");memset(file_date, 0, file_len);//清空文件内容缓冲区file_len = 0;//清空文件长度free(file_date);//释放文件内容缓冲区memset(&files, 0, sizeof(files));}else printf("open %s failed \n",Path);
}/**********************************************************************************************
函数功能：按深度打印文件夹名称
入口参数：dir_name：文件夹名称nDepth：文件夹的深度
返回值：无
**********************************************************************************************/
void Print_Dir(TCHAR *dir_name, uint8_t nDepth)
{for(int i=0; i<7*nDepth; i++){printf(" ");}printf("|—<< %s >>\n", dir_name);
}/**********************************************************************************************
函数功能：按深度打印文件名称
入口参数：file_name：文件名称nDepth：文件的深度
返回值：无
**********************************************************************************************/
void Printf_FileName(TCHAR *file_name, uint8_t nDepth)
{char file_addr[100] = "", str[100] = "";//定义两个字符串Dir_list *udir_list = { NULL };//文件夹列表for(udir_list = dir_lists; udir_list != NULL; udir_list=udir_list->next){sprintf(str, "%s/%s",udir_list->dir_name, file_addr);strcpy(file_addr, str);} strcat(file_addr,file_name);for(int i=0; i<7*nDepth; i++){printf(" ");}printf("|***( %s )\n", file_addr);//file_name/*不打印最前面的System Volume Information文件夹的内容*/if(strncmp("System Volume Information",(char *)dir_lists->dir_name,strlen("System Volume Information"))!=0) Get_file_date(file_addr, FA_READ);//|FA_WRITEmemset(file_addr, 0, sizeof(file_addr));memset(str, 0, sizeof(str));
}/**********************************************************************************************
函数功能：以文件树的形式打印当前路径下指定深度的所有文件/文件夹名称
入口参数：Path：指定路径nMaxDepth：最大深度
返回值：0：成功；1：失败；
**********************************************************************************************/
uint8_t Scan_file(TCHAR *Path, uint8_t nMaxDepth)
{DIR dir = { NULL };FRESULT res = f_opendir(&dir, Path);uint8_t sta = 0;Dir_list *udir_list = malloc(sizeof(Dir_list));;if(res == FR_OK){/*新建节点*/strcpy((char *)udir_list->dir_name, Path);//复制路径名称udir_list->next = dir_lists;dir_lists = udir_list;udir_list = 0;Print_Dir(Path, deep_count);deep_count++;do{res = f_readdir(&dir, &file_infos);if(res == FR_OK){if(file_infos.fname[0]){if((file_infos.fattrib & AM_DIR) == 0){/* 目标为文件，打印文件名 */Printf_FileName(file_infos.fname, deep_count);}else{/*目标为文件夹，打印文件夹名称，并执行递归 */if(deep_count < nMaxDepth)/* 在寻址深度内，进行递归 */{ sta = Scan_file(file_infos.fname, nMaxDepth);if(sta != 0) break;}}}else break;}else printf("f_readdir defeat, res=%d\n", res);}while(res == FR_OK);if(res == FR_OK && sta == 0 && deep_count > 0){deep_count--;}/*删除节点*/udir_list = dir_lists;dir_lists = dir_lists->next;memset(udir_list, 0, sizeof(Dir_list));free(udir_list);f_closedir(&dir);}else printf("f_opendir defeat, res=%d\n", res);return sta;
}/*以下代码替换main函数*/
int main(void)
{/* USER CODE BEGIN 1 */uint8_t res = 0;uint32_t total, free;//SD卡的总容量和剩余容量/* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_USART1_UART_Init();while(MX_SDIO_SD_Init()){HAL_Delay(10);}/* USER CODE BEGIN 2 */show_sdcard_info();//打印SD卡信息/*一维数组在记得加取地址符*/res = f_mount(&fs[0], "0:", 1); /* 挂载SD卡 */if (res == FR_NO_FILESYSTEM) /* FLASH磁盘,FAT文件系统错误,重新格式化FLASH */{printf("SD Disk Formatting...\n");res = f_mkfs("0:", 0, 0, FF_MAX_SS); /* 格式化FLASH,1:,盘符;0,使用默认格式化参数 */if (res == 0){f_setlabel((const TCHAR *)"0:ALIENTEK"); /* 设置Flash磁盘的名字为：ALIENTEK */printf("SD Disk Format Finish\n");}else{printf("SD Disk Format Error\n");}HAL_Delay(1000);} while (exfuns_get_free((uint8_t *)"0:", &total, &free)) /* 得到SD卡的总容量和剩余容量 */{printf("SD Card Fatfs Error!\n");HAL_Delay(1000);}printf("FATFS OK!\nSD Total Size: %d MB\nSD Free Size: %d MB\n",(total >> 10),(free >> 10));Scan_file((TCHAR *)"0:", 5);//扫描所有文件并且打印文件内容/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}
注意：记得适当修改堆栈的大小，因为里面有一部分内容使用的动态申请内存
7、测试结果
如果不想要打印文件内容，直接屏蔽“Printf_FileName”函数内的“Get_file_date(file_addr, FA_READ);”语句即可。
上次和本次推文的源代码在这：