FATFS里的FILINFO结构体详解

当调用FatFS中的f_readdir函数返回FILINFO值的时候，大家如果直接看FILINFO里面的值可能看不懂。因为里面的值需要大家转换一下，FILINFO的具体格式如下：

/* File information structure (FILINFO) */

typedef struct {
	FSIZE_t	fsize;			/* File size */
	WORD	fdate;			/* Modified date */
	WORD	ftime;			/* Modified time */
	BYTE	fattrib;		/* File attribute */
#if FF_USE_LFN
	TCHAR	altname[FF_SFN_BUF + 1];/* Altenative file name */
	TCHAR	fname[FF_LFN_BUF + 1];	/* Primary file name */
#else
	TCHAR	fname[12 + 1];	/* File name */
#endif
} FILINFO;

The FILINFO structure holds a file information returned by f_stat and f_readdir function.

typedef struct {
    DWORD fsize;      /* File size */
    WORD  fdate;      /* Last modified date */
    WORD  ftime;      /* Last modified time */
    BYTE  fattrib;    /* Attribute */
    TCHAR fname[13];  /* Short file name (8.3 format) */
#if _USE_LFN
    TCHAR* lfname;    /* Pointer to the LFN buffer */
    int   lfsize;     /* Size of the LFN buffer in unit of TCHAR */
#endif
} FILINFO;

Members
fsize：Indicates size of the file in unit of byte. Always zero for directories.
fdate：Indicates the date that the file was modified or the directory was created.
            bit15:9
                Year origin from 1980 (0..127)
            bit8:5
                Month (1..12)
            bit4:0
                Day (1..31)
ftime：Indicates the time that the file was modified or the directory was created.
            bit15:11
                Hour (0..23)
            bit10:5
                Minute (0..59)
            bit4:0
                Second / 2 (0..29)

fattrib：Indicates the file/directory attribute in combination of AM_DIR, AM_RDO, AM_HID, AM_SYS and                 AM_ARC.

fname[]：Indicates the file/directory name in 8.3 format null-terminated string. It is always returnd with upper           case on  non-LFN configuration but it can be returned with lower case on LFN configuration.

lfname：Pointer to the LFN buffer to store the read LFN. This member must be initialized by application prior          to use this str ucture. Not available on non-LFN configuration.

lfsize：Size of the LFN buffer in unit of TCHAR. This member must be initialized by application prior to use this             structure. Not available on non-LFN configuration.