int main (void)
{
    FATFS fatfs;            // File system object
    for (;;);

}

/* File system object structure (FATFS) */

typedef struct {
    BYTE    fs_type;        /* FAT sub-type (0:Not mounted) */
    BYTE    drv;            /* Physical drive number */
    BYTE    csize;            /* Sectors per cluster (1,2,4...128) */
    BYTE    n_fats;            /* Number of FAT copies (1,2) */
    BYTE    wflag;            /* win[] dirty flag (1:must be written back) */
    BYTE    fsi_flag;        /* fsinfo dirty flag (1:must be written back) */
    WORD    id;                /* File system mount ID */
    WORD    n_rootdir;        /* Number of root directory entries (FAT12/16) */
#if _MAX_SS != 512
    WORD    ssize;            /* Bytes per sector (512, 1024, 2048 or 4096) */
#endif
#if _FS_REENTRANT
    _SYNC_t    sobj;            /* Identifier of sync object */
#endif
#if !_FS_READONLY
    DWORD    last_clust;        /* Last allocated cluster */
    DWORD    free_clust;        /* Number of free clusters */
    DWORD    fsi_sector;        /* fsinfo sector (FAT32) */
#endif
#if _FS_RPATH
    DWORD    cdir;            /* Current directory start cluster (0:root) */
#endif
    DWORD    n_fatent;        /* Number of FAT entries (= number of clusters + 2) */
    DWORD    fsize;            /* Sectors per FAT */
    DWORD    fatbase;        /* FAT start sector */
    DWORD    dirbase;        /* Root directory start sector (FAT32:Cluster#) */
    DWORD    database;        /* Data start sector */
    DWORD    winsect;        /* Current sector appearing in the win[] */
    BYTE    win[_MAX_SS];    /* Disk access window for Directory, FAT (and Data on tiny cfg) */
} FATFS;