FatFs文件系统:
ff11a.zip
来自网站:http://elm-chan.org/fsw/ff/00index_e.html
FatFs文件系统移植
视频教程:https://www.bilibili.com/video/BV1yW411Y7Gw?p=65
diskio.h
/*-----------------------------------------------------------------------/
/ Low level disk interface modlue include file (C)ChaN, 2014 /
/-----------------------------------------------------------------------*/
#ifndef _DISKIO_DEFINED
#define _DISKIO_DEFINED
#ifdef __cplusplus
extern "C" {
#endif
#define _USE_WRITE 1 /* 1: Enable disk_write function */
#define _USE_IOCTL 1 /* 1: Enable disk_ioctl fucntion */
#include "integer.h"
/* Status of Disk Functions */
typedef BYTE DSTATUS;
/* Results of Disk Functions */
typedef enum {
RES_OK = 0, /* 0: Successful */
RES_ERROR, /* 1: R/W Error */
RES_WRPRT, /* 2: Write Protected */
RES_NOTRDY, /* 3: Not Ready */
RES_PARERR /* 4: Invalid Parameter */
} DRESULT;
/*---------------------------------------*/
/* Prototypes for disk control functions */
DSTATUS disk_initialize (BYTE pdrv);
DSTATUS disk_status (BYTE pdrv);
DRESULT disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count);
DRESULT disk_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count);
DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
/* Disk Status Bits (DSTATUS) */
#define STA_NOINIT 0x01 /* Drive not initialized */
#define STA_NODISK 0x02 /* No medium in the drive */
#define STA_PROTECT 0x04 /* Write protected */
/* Command code for disk_ioctrl fucntion */
/* Generic command (Used by FatFs) */
#define CTRL_SYNC 0 /* Complete pending write process (needed at _FS_READONLY == 0) */
#define GET_SECTOR_COUNT 1 /* Get media size (needed at _USE_MKFS == 1) */
#define GET_SECTOR_SIZE 2 /* Get sector size (needed at _MAX_SS != _MIN_SS) */
#define GET_BLOCK_SIZE 3 /* Get erase block size (needed at _USE_MKFS == 1) */
#define CTRL_TRIM 4 /* Inform device that the data on the block of sectors is no longer used (needed at _USE_TRIM == 1) */
/* Generic command (Not used by FatFs) */
#define CTRL_POWER 5 /* Get/Set power status */
#define CTRL_LOCK 6 /* Lock/Unlock media removal */
#define CTRL_EJECT 7 /* Eject media */
#define CTRL_FORMAT 8 /* Create physical format on the media */
/* MMC/SDC specific ioctl command */
#define MMC_GET_TYPE 10 /* Get card type */
#define MMC_GET_CSD 11 /* Get CSD */
#define MMC_GET_CID 12 /* Get CID */
#define MMC_GET_OCR 13 /* Get OCR */
#define MMC_GET_SDSTAT 14 /* Get SD status */
/* ATA/CF specific ioctl command */
#define ATA_GET_REV 20 /* Get F/W revision */
#define ATA_GET_MODEL 21 /* Get model name */
#define ATA_GET_SN 22 /* Get serial number */
#ifdef __cplusplus
}
#endif
#endif
diskio.c
/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2013 */
/*-----------------------------------------------------------------------*/
/* 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 module to the FatFs module with a defined API. */
/*-----------------------------------------------------------------------*/
#include "diskio.h" /* FatFs lower layer API */
#include "ff.h"
#include "./flash/bsp_spi_flash.h"
/* 为每个设备定义一个物理编号 */
#define ATA 0 // 预留SD卡使用
#define SPI_FLASH 1 // 外部SPI Flash
/*-----------------------------------------------------------------------*/
/* 获取设备状态 */
/*-----------------------------------------------------------------------*/
DSTATUS disk_status (
BYTE pdrv /* 物理编号 */
)
{
DSTATUS status = STA_NOINIT;
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH:
/* SPI Flash状态检测:读取SPI Flash 设备ID */
if(sFLASH_ID == SPI_FLASH_ReadID())
{
/* 设备ID读取结果正确 */
status &= ~STA_NOINIT;
}
else
{
/* 设备ID读取结果错误 */
status = STA_NOINIT;;
}
break;
default:
status = STA_NOINIT;
}
return status;
}
/*-----------------------------------------------------------------------*/
/* 设备初始化 */
/*-----------------------------------------------------------------------*/
DSTATUS disk_initialize (
BYTE pdrv /* 物理编号 */
)
{
uint16_t i;
DSTATUS status = STA_NOINIT;
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH: /* SPI Flash */
/* 初始化SPI Flash */
SPI_FLASH_Init();
/* 延时一小段时间 */
i=500;
while(--i);
/* 唤醒SPI Flash */
SPI_Flash_WAKEUP();
/* 获取SPI Flash芯片状态 */
status=disk_status(SPI_FLASH);
break;
default:
status = STA_NOINIT;
}
return status;
}
/*-----------------------------------------------------------------------*/
/* 读扇区:读取扇区内容到指定存储区 */
/*-----------------------------------------------------------------------*/
DRESULT disk_read (
BYTE pdrv, /* 设备物理编号(0..) */
BYTE *buff, /* 数据缓存区 */
DWORD sector, /* 扇区首地址 */
UINT count /* 扇区个数(1..128) */
)
{
DRESULT status = RES_PARERR;
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH:
/* 扇区偏移2MB,外部Flash文件系统空间放在SPI Flash后面6MB空间 */
sector+=512;
SPI_FLASH_BufferRead(buff, sector <<12, count<<12);
status = RES_OK;
break;
default:
status = RES_PARERR;
}
return status;
}
/*-----------------------------------------------------------------------*/
/* 写扇区:见数据写入指定扇区空间上 */
/*-----------------------------------------------------------------------*/
#if _USE_WRITE
DRESULT disk_write (
BYTE pdrv, /* 设备物理编号(0..) */
const BYTE *buff, /* 欲写入数据的缓存区 */
DWORD sector, /* 扇区首地址 */
UINT count /* 扇区个数(1..128) */
)
{
uint32_t write_addr;
DRESULT status = RES_PARERR;
if (!count) {
return RES_PARERR; /* Check parameter */
}
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH:
/* 扇区偏移2MB,外部Flash文件系统空间放在SPI Flash后面6MB空间 */
sector+=512;
write_addr = sector<<12;
SPI_FLASH_SectorErase(write_addr); // 擦掉
SPI_FLASH_BufferWrite((u8 *)buff,write_addr,count<<12);
status = RES_OK;
break;
default:
status = RES_PARERR;
}
return status;
}
#endif
/*-----------------------------------------------------------------------*/
/* 其他控制 */
/*-----------------------------------------------------------------------*/
#if _USE_IOCTL
DRESULT disk_ioctl (
BYTE pdrv, /* 物理编号 */
BYTE cmd, /* 控制指令 */
void *buff /* 写入或者读取数据地址指针 */
)
{
DRESULT status = RES_PARERR;
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH:
switch (cmd) {
/* 扇区数量:1536*4096/1024/1024=6(MB) */
case GET_SECTOR_COUNT:
*(DWORD * )buff = 1536;
break;
/* 扇区大小 */
case GET_SECTOR_SIZE :
*(WORD * )buff = 4096;
break;
/* 同时擦除扇区个数 */
case GET_BLOCK_SIZE :
*(DWORD * )buff = 1;
break;
}
status = RES_OK;
break;
default:
status = RES_PARERR;
}
return status;
}
#endif
__weak DWORD get_fattime(void) {
/* 返回当前时间戳 */
return ((DWORD)(2015 - 1980) << 25) /* Year 2015 */
| ((DWORD)1 << 21) /* Month 1 */
| ((DWORD)1 << 16) /* Mday 1 */
| ((DWORD)0 << 11) /* Hour 0 */
| ((DWORD)0 << 5) /* Min 0 */
| ((DWORD)0 >> 1); /* Sec 0 */
}
main.c
/**
******************************************************************************
* @file main.c
* @author fire
* @version V1.0
* @date 2013-xx-xx
* @brief SPI FLASH文件系统例程
******************************************************************************
* @attention
*
* 实验平台:野火 STM32 F103-霸道 开发板
* 论坛 :http://www.firebbs.cn
* 淘宝 :https://fire-stm32.taobao.com
*
******************************************************************************
*/
#include "stm32f10x.h"
#include "ff.h"
#include "./flash/bsp_spi_flash.h"
#include "./usart/bsp_usart.h"
#include "./led/bsp_led.h"
FATFS fs; /* FatFs文件系统对象 */
FIL fnew; /* 文件对象 */
FRESULT res_flash; /* 文件操作结果 */
UINT fnum; /* 文件成功读写数量 */
BYTE ReadBuffer[1024]={0}; /* 读缓冲区 */
BYTE WriteBuffer[] = /* 写缓冲区*/
"欢迎使用野火STM32开发板 今天是个好日子,新建文件系统测试文件\r\n";
int main(void)
{
/* 初始化LED */
LED_GPIO_Config();
LED_BLUE;
/* 初始化调试串口,一般为串口1 */
USART_Config();
printf("****** 这是一个SPI FLASH 文件系统实验 ******\r\n");
//在外部SPI Flash挂载文件系统,文件系统挂载时会对SPI设备初始化
//初始化函数调用流程如下
//f_mount()->find_volume()->disk_initialize->SPI_FLASH_Init()
res_flash = f_mount(&fs,"1:",1);
/*----------------------- 格式化测试 -----------------*/
/* 如果没有文件系统就格式化创建创建文件系统 */
if(res_flash == FR_NO_FILESYSTEM)
{
printf("》FLASH还没有文件系统,即将进行格式化...\r\n");
/* 格式化 */
res_flash=f_mkfs("1:",0,0);
if(res_flash == FR_OK)
{
printf("》FLASH已成功格式化文件系统。\r\n");
/* 格式化后,先取消挂载 */
res_flash = f_mount(NULL,"1:",1);
/* 重新挂载 */
res_flash = f_mount(&fs,"1:",1);
}
else
{
LED_RED;
printf("《《格式化失败。》》\r\n");
while(1);
}
}
else if(res_flash!=FR_OK)
{
printf("!!外部Flash挂载文件系统失败。(%d)\r\n",res_flash);
printf("!!可能原因:SPI Flash初始化不成功。\r\n");
while(1);
}
else
{
printf("》文件系统挂载成功,可以进行读写测试\r\n");
}
/*----------------------- 文件系统测试:写测试 -------------------*/
/* 打开文件,每次都以新建的形式打开,属性为可写 */
printf("\r\n****** 即将进行文件写入测试... ******\r\n");
res_flash = f_open(&fnew, "1:FatFs读写测试文件.txt",FA_CREATE_ALWAYS | FA_WRITE );
if ( res_flash == FR_OK )
{
printf("》打开/创建FatFs读写测试文件.txt文件成功,向文件写入数据。\r\n");
/* 将指定存储区内容写入到文件内 */
res_flash=f_write(&fnew,WriteBuffer,sizeof(WriteBuffer),&fnum);
if(res_flash==FR_OK)
{
printf("》文件写入成功,写入字节数据:%d\n",fnum);
printf("》向文件写入的数据为:\r\n%s\r\n",WriteBuffer);
}
else
{
printf("!!文件写入失败:(%d)\n",res_flash);
}
/* 不再读写,关闭文件 */
f_close(&fnew);
}
else
{
LED_RED;
printf("!!打开/创建文件失败。\r\n");
}
/*------------------- 文件系统测试:读测试 --------------------------*/
printf("****** 即将进行文件读取测试... ******\r\n");
res_flash = f_open(&fnew, "1:FatFs读写测试文件.txt",FA_OPEN_EXISTING | FA_READ);
if(res_flash == FR_OK)
{
LED_GREEN;
printf("》打开文件成功。\r\n");
res_flash = f_read(&fnew, ReadBuffer, sizeof(ReadBuffer), &fnum);
if(res_flash==FR_OK)
{
printf("》文件读取成功,读到字节数据:%d\r\n",fnum);
printf("》读取得的文件数据为:\r\n%s \r\n", ReadBuffer);
}
else
{
printf("!!文件读取失败:(%d)\n",res_flash);
}
}
else
{
LED_RED;
printf("!!打开文件失败。\r\n");
}
/* 不再读写,关闭文件 */
f_close(&fnew);
/* 不再使用文件系统,取消挂载文件系统 */
f_mount(NULL,"1:",1);
/* 操作完成,停机 */
while(1)
{
}
}
/*********************************************END OF FILE**********************/
FatFs文件系统常用函数测试
视频教程:https://www.bilibili.com/video/BV1yW411Y7Gw?p=67
diskio.h
/*-----------------------------------------------------------------------/
/ Low level disk interface modlue include file (C)ChaN, 2014 /
/-----------------------------------------------------------------------*/
#ifndef _DISKIO_DEFINED
#define _DISKIO_DEFINED
#ifdef __cplusplus
extern "C" {
#endif
#define _USE_WRITE 1 /* 1: Enable disk_write function */
#define _USE_IOCTL 1 /* 1: Enable disk_ioctl fucntion */
#include "integer.h"
/* Status of Disk Functions */
typedef BYTE DSTATUS;
/* Results of Disk Functions */
typedef enum {
RES_OK = 0, /* 0: Successful */
RES_ERROR, /* 1: R/W Error */
RES_WRPRT, /* 2: Write Protected */
RES_NOTRDY, /* 3: Not Ready */
RES_PARERR /* 4: Invalid Parameter */
} DRESULT;
/*---------------------------------------*/
/* Prototypes for disk control functions */
DSTATUS disk_initialize (BYTE pdrv);
DSTATUS disk_status (BYTE pdrv);
DRESULT disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count);
DRESULT disk_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count);
DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
/* Disk Status Bits (DSTATUS) */
#define STA_NOINIT 0x01 /* Drive not initialized */
#define STA_NODISK 0x02 /* No medium in the drive */
#define STA_PROTECT 0x04 /* Write protected */
/* Command code for disk_ioctrl fucntion */
/* Generic command (Used by FatFs) */
#define CTRL_SYNC 0 /* Complete pending write process (needed at _FS_READONLY == 0) */
#define GET_SECTOR_COUNT 1 /* Get media size (needed at _USE_MKFS == 1) */
#define GET_SECTOR_SIZE 2 /* Get sector size (needed at _MAX_SS != _MIN_SS) */
#define GET_BLOCK_SIZE 3 /* Get erase block size (needed at _USE_MKFS == 1) */
#define CTRL_TRIM 4 /* Inform device that the data on the block of sectors is no longer used (needed at _USE_TRIM == 1) */
/* Generic command (Not used by FatFs) */
#define CTRL_POWER 5 /* Get/Set power status */
#define CTRL_LOCK 6 /* Lock/Unlock media removal */
#define CTRL_EJECT 7 /* Eject media */
#define CTRL_FORMAT 8 /* Create physical format on the media */
/* MMC/SDC specific ioctl command */
#define MMC_GET_TYPE 10 /* Get card type */
#define MMC_GET_CSD 11 /* Get CSD */
#define MMC_GET_CID 12 /* Get CID */
#define MMC_GET_OCR 13 /* Get OCR */
#define MMC_GET_SDSTAT 14 /* Get SD status */
/* ATA/CF specific ioctl command */
#define ATA_GET_REV 20 /* Get F/W revision */
#define ATA_GET_MODEL 21 /* Get model name */
#define ATA_GET_SN 22 /* Get serial number */
#ifdef __cplusplus
}
#endif
#endif
diskio.c
/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2013 */
/*-----------------------------------------------------------------------*/
/* 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 module to the FatFs module with a defined API. */
/*-----------------------------------------------------------------------*/
#include "diskio.h" /* FatFs lower layer API */
#include "ff.h"
#include "./flash/bsp_spi_flash.h"
/* 为每个设备定义一个物理编号 */
#define ATA 0 // 预留SD卡使用
#define SPI_FLASH 1 // 外部SPI Flash
/*-----------------------------------------------------------------------*/
/* 获取设备状态 */
/*-----------------------------------------------------------------------*/
DSTATUS disk_status (
BYTE pdrv /* 物理编号 */
)
{
DSTATUS status = STA_NOINIT;
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH:
/* SPI Flash状态检测:读取SPI Flash 设备ID */
if(sFLASH_ID == SPI_FLASH_ReadID())
{
/* 设备ID读取结果正确 */
status &= ~STA_NOINIT;
}
else
{
/* 设备ID读取结果错误 */
status = STA_NOINIT;;
}
break;
default:
status = STA_NOINIT;
}
return status;
}
/*-----------------------------------------------------------------------*/
/* 设备初始化 */
/*-----------------------------------------------------------------------*/
DSTATUS disk_initialize (
BYTE pdrv /* 物理编号 */
)
{
uint16_t i;
DSTATUS status = STA_NOINIT;
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH: /* SPI Flash */
/* 初始化SPI Flash */
SPI_FLASH_Init();
/* 延时一小段时间 */
i=500;
while(--i);
/* 唤醒SPI Flash */
SPI_Flash_WAKEUP();
/* 获取SPI Flash芯片状态 */
status=disk_status(SPI_FLASH);
break;
default:
status = STA_NOINIT;
}
return status;
}
/*-----------------------------------------------------------------------*/
/* 读扇区:读取扇区内容到指定存储区 */
/*-----------------------------------------------------------------------*/
DRESULT disk_read (
BYTE pdrv, /* 设备物理编号(0..) */
BYTE *buff, /* 数据缓存区 */
DWORD sector, /* 扇区首地址 */
UINT count /* 扇区个数(1..128) */
)
{
DRESULT status = RES_PARERR;
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH:
/* 扇区偏移2MB,外部Flash文件系统空间放在SPI Flash后面6MB空间 */
sector+=512;
SPI_FLASH_BufferRead(buff, sector <<12, count<<12);
status = RES_OK;
break;
default:
status = RES_PARERR;
}
return status;
}
/*-----------------------------------------------------------------------*/
/* 写扇区:见数据写入指定扇区空间上 */
/*-----------------------------------------------------------------------*/
#if _USE_WRITE
DRESULT disk_write (
BYTE pdrv, /* 设备物理编号(0..) */
const BYTE *buff, /* 欲写入数据的缓存区 */
DWORD sector, /* 扇区首地址 */
UINT count /* 扇区个数(1..128) */
)
{
uint32_t write_addr;
DRESULT status = RES_PARERR;
if (!count) {
return RES_PARERR; /* Check parameter */
}
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH:
/* 扇区偏移2MB,外部Flash文件系统空间放在SPI Flash后面6MB空间 */
sector+=512;
write_addr = sector<<12;
SPI_FLASH_SectorErase(write_addr);
SPI_FLASH_BufferWrite((u8 *)buff,write_addr,count<<12);
status = RES_OK;
break;
default:
status = RES_PARERR;
}
return status;
}
#endif
/*-----------------------------------------------------------------------*/
/* 其他控制 */
/*-----------------------------------------------------------------------*/
#if _USE_IOCTL
DRESULT disk_ioctl (
BYTE pdrv, /* 物理编号 */
BYTE cmd, /* 控制指令 */
void *buff /* 写入或者读取数据地址指针 */
)
{
DRESULT status = RES_PARERR;
switch (pdrv) {
case ATA: /* SD CARD */
break;
case SPI_FLASH:
switch (cmd) {
/* 扇区数量:1536*4096/1024/1024=6(MB) */
case GET_SECTOR_COUNT:
*(DWORD * )buff = 1536;
break;
/* 扇区大小 */
case GET_SECTOR_SIZE :
*(WORD * )buff = 4096;
break;
/* 同时擦除扇区个数 */
case GET_BLOCK_SIZE :
*(DWORD * )buff = 1;
break;
}
status = RES_OK;
break;
default:
status = RES_PARERR;
}
return status;
}
#endif
__weak DWORD get_fattime(void) {
/* 返回当前时间戳 */
return ((DWORD)(2015 - 1980) << 25) /* Year 2015 */
| ((DWORD)1 << 21) /* Month 1 */
| ((DWORD)1 << 16) /* Mday 1 */
| ((DWORD)0 << 11) /* Hour 0 */
| ((DWORD)0 << 5) /* Min 0 */
| ((DWORD)0 >> 1); /* Sec 0 */
}
main.c
/**
******************************************************************************
* @file main.c
* @author fire
* @version V1.0
* @date 2013-xx-xx
* @brief SPI FLASH文件系统常用功能演示
******************************************************************************
* @attention
*
* 实验平台:野火 STM32 F103-霸道 开发板
* 论坛 :http://www.firebbs.cn
* 淘宝 :https://fire-stm32.taobao.com
*
******************************************************************************
*/
#include "stm32f10x.h"
#include "./usart/bsp_usart.h"
#include "ff.h"
#include "string.h"
/**
******************************************************************************
* 定义变量
******************************************************************************
*/
FATFS fs; /* FatFs文件系统对象 */
FIL fnew; /* 文件对象 */
FRESULT res_flash; /* 文件操作结果 */
UINT fnum; /* 文件成功读写数量 */
char fpath[100]; /* 保存当前扫描路径 */
char readbuffer[512];
/**
******************************************************************************
* 任务函数
******************************************************************************
*/
/* FatFs多项功能测试 */
static FRESULT miscellaneous(void)
{
DIR dir;
FATFS *pfs;
DWORD fre_clust, fre_sect, tot_sect;
printf("\n*************** 设备信息获取 ***************\r\n");
/* 获取设备信息和空簇大小 */
res_flash = f_getfree("1:", &fre_clust, &pfs);
/* 计算得到总的扇区个数和空扇区个数 */
tot_sect = (pfs->n_fatent - 2) * pfs->csize;
fre_sect = fre_clust * pfs->csize;
/* 打印信息(4096 字节/扇区) */
printf("》设备总空间:%10lu KB。\n》可用空间: %10lu KB。\n", tot_sect *4, fre_sect *4);
printf("\n******** 文件定位和格式化写入功能测试 ********\r\n");
res_flash = f_open(&fnew, "1:FatFs读写测试文件.txt",
FA_OPEN_ALWAYS|FA_WRITE|FA_READ );
if ( res_flash == FR_OK )
{
/* 文件定位 */
res_flash = f_lseek(&fnew,f_size(&fnew));
if (res_flash == FR_OK)
{
/* 格式化写入,参数格式类似printf函数 */
f_printf(&fnew,"\n在原来文件新添加一行内容\n");
f_printf(&fnew,"》设备总空间:%10lu KB。\n》可用空间: %10lu KB。\n", tot_sect *4, fre_sect *4);
/* 文件定位到文件起始位置 */
res_flash = f_lseek(&fnew,0);
/* 读取文件所有内容到缓存区 */
res_flash = f_read(&fnew,readbuffer,f_size(&fnew),&fnum);
if(res_flash == FR_OK)
{
printf("》文件内容:\n%s\n",readbuffer);
}
}
f_close(&fnew);
printf("\n********** 目录创建和重命名功能测试 **********\r\n");
/* 尝试打开目录 */
res_flash=f_opendir(&dir,"1:TestDir");
if(res_flash!=FR_OK)
{
/* 打开目录失败,就创建目录 */
res_flash=f_mkdir("1:TestDir");
}
else
{
/* 如果目录已经存在,关闭它 */
res_flash=f_closedir(&dir);
/* 删除文件 */
f_unlink("1:TestDir/testdir.txt");
}
if(res_flash==FR_OK)
{
/* 重命名并移动文件 */
res_flash=f_rename("1:FatFs读写测试文件.txt","1:TestDir/testdir.txt");
}
}
else
{
printf("!! 打开文件失败:%d\n",res_flash);
printf("!! 或许需要再次运行“FatFs移植与读写测试”工程\n");
}
return res_flash;
}
FILINFO fno;
/**
* 文件信息获取
*/
static FRESULT file_check(void)
{
/* 获取文件信息 */
res_flash=f_stat("1:TestDir/testdir.txt",&fno);
if(res_flash==FR_OK)
{
printf("“testdir.txt”文件信息:\n");
printf("》文件大小: %ld(字节)\n", fno.fsize);
printf("》时间戳: %u/%02u/%02u, %02u:%02u\n",
(fno.fdate >> 9) + 1980, fno.fdate >> 5 & 15, fno.fdate & 31,fno.ftime >> 11, fno.ftime >> 5 & 63);
printf("》属性: %c%c%c%c%c\n\n",
(fno.fattrib & AM_DIR) ? 'D' : '-', // 是一个目录
(fno.fattrib & AM_RDO) ? 'R' : '-', // 只读文件
(fno.fattrib & AM_HID) ? 'H' : '-', // 隐藏文件
(fno.fattrib & AM_SYS) ? 'S' : '-', // 系统文件
(fno.fattrib & AM_ARC) ? 'A' : '-'); // 档案文件
}
return res_flash;
}
/**
* @brief scan_files 递归扫描FatFs内的文件
* @param path:初始扫描路径
* @retval result:文件系统的返回值
*/
static FRESULT scan_files (char* path)
{
FRESULT res; //部分在递归过程被修改的变量,不用全局变量
FILINFO fno;
DIR dir;
int i;
char *fn; // 文件名
#if _USE_LFN
/* 长文件名支持 */
/* 简体中文需要2个字节保存一个“字”*/
static char lfn[_MAX_LFN*2 + 1];
fno.lfname = lfn;
fno.lfsize = sizeof(lfn);
#endif
//打开目录
res = f_opendir(&dir, path);
if (res == FR_OK)
{
i = strlen(path);
for (;;)
{
//读取目录下的内容,再读会自动读下一个文件
res = f_readdir(&dir, &fno);
//为空时表示所有项目读取完毕,跳出
if (res != FR_OK || fno.fname[0] == 0) break;
#if _USE_LFN
fn = *fno.lfname ? fno.lfname : fno.fname;
#else
fn = fno.fname;
#endif
//点表示当前目录,跳过
if (*fn == '.') continue;
//目录,递归读取
if (fno.fattrib & AM_DIR)
{
//合成完整目录名
sprintf(&path[i], "/%s", fn);
//递归遍历
res = scan_files(path);
path[i] = 0;
//打开失败,跳出循环
if (res != FR_OK)
break;
}
else
{
printf("%s/%s\r\n", path, fn); //输出文件名
/* 可以在这里提取特定格式的文件路径 */
}//else
} //for
}
return res;
}
/**
* @brief 主函数
* @param 无
* @retval 无
*/
int main(void)
{
/* 初始化调试串口,一般为串口1 */
USART_Config();
printf("******** 这是一个SPI FLASH 文件系统实验 *******\r\n");
//在外部SPI Flash挂载文件系统,文件系统挂载时会对SPI设备初始化
res_flash = f_mount(&fs,"1:",1);
if(res_flash!=FR_OK)
{
printf("!!外部Flash挂载文件系统失败。(%d)\r\n",res_flash);
printf("!!可能原因:SPI Flash初始化不成功。\r\n");
while(1);
}
else
{
printf("》文件系统挂载成功,可以进行测试\r\n");
}
/* FatFs多项功能测试 */
res_flash = miscellaneous();
printf("\n*************** 文件信息获取测试 **************\r\n");
res_flash = file_check();
printf("***************** 文件扫描测试 ****************\r\n");
strcpy(fpath,"1:");
scan_files(fpath);
/* 不再使用文件系统,取消挂载文件系统 */
f_mount(NULL,"1:",1);
/* 操作完成,停机 */
while(1)
{
}
}
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/