芯片型号：STM32F407
函数名称: FRESULT f_stat (const TCHAR* path, FILINFO* fno)
功能说明:
path 指向以null结尾的字符串的指针，该字符串指定要获取其信息的路径，不能是根目录。fno 指向FILINFO结构体来存储对象的信息，如果不需要此信息，请设置空指针。
FRESULT fr;
FILINFO fno;
printf("Test for ''...\n");
fr = f_stat("", &fno);
switch (fr) {
case FR_OK:
printf("Size: %lu\n", );
break;
case FR_NO_FILE:
printf("It is not exist.\n");
break;
default:
printf("An error occured. (%d)\n", fr);
}
FRESULT返回值说明：
typedef enum {
FR_OK = 0, /* (0) Succeeded */
FR_DISK_ERR, /* (1) A hard error occurred in the low level disk I/O layer */
FR_INT_ERR, /* (2) Assertion failed */
FR_NOT_READY, /* (3) The physical drive cannot work */
FR_NO_FILE, /* (4) Could not find the file */
FR_NO_PATH, /* (5) Could not find the path */
FR_INVALID_NAME, /* (6) The path name format is invalid */
FR_DENIED, /* (7) Access denied due to prohibited access or directory full */
FR_EXIST, /* (8) Access denied due to prohibited access */
FR_INVALID_OBJECT, /* (9) The file/directory object is invalid */
FR_WRITE_PROTECTED, /* (10) The physical drive is write protected */
FR_INVALID_DRIVE, /* (11) The logical drive number is invalid */
FR_NOT_ENABLED, /* (12) The volume has no work area */
FR_NO_FILESYSTEM, /* (13) There is no valid FAT volume */
FR_MKFS_ABORTED, /* (14) The f_mkfs() aborted due to any problem */
FR_TIMEOUT, /* (15) Could not get a grant to access the volume within defined period */
FR_LOCKED, /* (16) The operation is rejected according to the file sharing policy */
FR_NOT_ENOUGH_CORE, /* (17) LFN working buffer could not be allocated */
FR_TOO_MANY_OPEN_FILES, /* (18) Number of open files > _FS_LOCK */
FR_INVALID_PARAMETER /* (19) Given parameter is invalid */
} FRESULT;FILINFO结构体说明：
typedef struct {
FSIZE_t fsize; /* File size */
WORD fdate; /* Modified date */
WORD ftime; /* Modified time */
BYTE fattrib; /* File attribute */
#if _USE_LFN != 0
TCHAR altname[13]; /* Alternative file name */
TCHAR fname[_MAX_LFN + 1]; /* Primary file name */
#else
TCHAR fname[13]; /* File name */
#endif
} FILINFO;