585 lines
19 KiB
C
585 lines
19 KiB
C
/*---------------------------------------------------------------------------/
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/ FatFs - FAT file system module include file R0.07a (C)ChaN, 2009
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/----------------------------------------------------------------------------/
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/ FatFs module is an open source software to implement FAT file system to
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/ small embedded systems. This is a free software and is opened for education,
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/ research and commercial developments under license policy of following trems.
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/
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/ Copyright (C) 2009, ChaN, all right reserved.
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/
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/ * The FatFs module is a free software and there is NO WARRANTY.
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/ * No restriction on use. You can use, modify and redistribute it for
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/ personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
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/ * Redistributions of source code must retain the above copyright notice.
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/----------------------------------------------------------------------------*/
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#include "integer.h"
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/*---------------------------------------------------------------------------/
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/ FatFs Configuration Options
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/
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/ CAUTION! Do not forget to make clean the project after any changes to
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/ the configuration options.
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/
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/----------------------------------------------------------------------------*/
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#ifndef _FATFS
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#define _FATFS
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#define _WORD_ACCESS 1
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/*
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* The _WORD_ACCESS option defines which access method is used to the word / data in the FAT structure. / / 0: Byte-by-byte access. Always
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* compatible with all platforms. / 1: Word access. Do not choose this unless following condition is met. / / When the byte order on the
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* memory is big-endian or address miss-aligned / word access results incorrect behavior, the _WORD_ACCESS must be set to 0. / If it is not
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* the case, the value can also be set to 1 to improve the / performance and code efficiency.
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*/
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#define _FS_READONLY 0
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/*
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* Setting _FS_READONLY to 1 defines read only configuration. This removes / writing functions, f_write, f_sync, f_unlink, f_mkdir,
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* f_chmod, f_rename, / f_truncate and useless f_getfree.
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*/
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#define _FS_MINIMIZE 0
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/*
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* The _FS_MINIMIZE option defines minimization level to remove some functions. / / 0: Full function. / 1: f_stat, f_getfree, f_unlink,
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* f_mkdir, f_chmod, f_truncate and f_rename / are removed. / 2: f_opendir and f_readdir are removed in addition to level 1. / 3: f_lseek
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* is removed in addition to level 2.
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*/
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#define _FS_TINY 0
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/*
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* When _FS_TINY is set to 1, FatFs uses the sector buffer in the file system / object instead of the sector buffer in the individual file
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* object for file / data transfer. This reduces memory consumption 512 bytes each file object.
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*/
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#define _USE_STRFUNC 0
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/*
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* To enable string functions, set _USE_STRFUNC to 1 or 2.
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*/
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#define _USE_MKFS 0
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/*
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* To enable f_mkfs function, set _USE_MKFS to 1 and set _FS_READONLY to 0
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*/
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#define _USE_FORWARD 0
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/*
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* To enable f_forward function, set _USE_FORWARD to 1 and set _FS_TINY to 1.
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*/
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#define _DRIVES 1
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/*
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* Number of volumes (logical drives) to be used.
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*/
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#define _MAX_SS 512
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/*
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* Maximum sector size to be handled. (512/1024/2048/4096)
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*/
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/*
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* 512 for memroy card and hard disk, 1024 for floppy disk, 2048 for MO disk
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*/
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#define _MULTI_PARTITION 0
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/*
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* When _MULTI_PARTITION is set to 0, each volume is bound to the same physical / drive number and can mount only first primaly partition.
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* When it is set to 1, / each volume is tied to the partitions listed in Drives[].
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*/
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#define _CODE_PAGE 437
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/*
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* The _CODE_PAGE specifies the OEM code page to be used on the target system. / When it is non LFN configuration, there is no difference
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* between SBCS code / pages. When LFN is enabled, the code page must always be set correctly. / 437 - U.S. / 720 - Arabic / 737 - Greek /
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* 775 - Baltic / 850 - Multilingual Latin 1 / 852 - Latin 2 / 855 - Cyrillic / 857 - Turkish / 858 - Multilingual Latin 1 + Euro / 862 -
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* Hebrew / 866 - Russian / 874 - Thai / 932 - Japanese Shift-JIS (DBCS) / 936 - Simplified Chinese GBK (DBCS) / 949 - Korean (DBCS) / 950
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* - Traditional Chinese Big5 (DBCS) / 1258 - Vietnam
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*/
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#define _USE_LFN 0
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#define _MAX_LFN 255 /* Maximum LFN length to handle (max:255) */
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/*
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* The _USE_LFN option switches the LFN support. / / 0: Disable LFN. / 1: Enable LFN with static working buffer on the bss. NOT REENTRANT.
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* / 2: Enable LFN with dynamic working buffer on the caller's STACK. / / The working buffer occupies (_MAX_LFN + 1) * 2 bytes. When enable
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* LFN, / a Unicode - OEM code conversion function ff_convert() must be added to / the project.
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*/
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#define _FS_REENTRANT 0
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#define _TIMEOUT 1000 /* Timeout period in unit of time ticks */
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#define _SYNC_t HANDLE /* Type of sync object used on the OS. */
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/*
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* e.g. HANDLE, OS_EVENT*, ID and etc..
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*/
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/*
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* To make the FatFs module re-entrant, set _FS_REENTRANT to 1 and add user / provided synchronization handlers, ff_req_grant,
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* ff_rel_grant, / ff_del_syncobj and ff_cre_syncobj function to the project.
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*/
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/*
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* End of configuration options. Do not change followings without care.
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*/
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/*--------------------------------------------------------------------------*/
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/*
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* Definitions corresponds to multiple sector size
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*/
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#if _MAX_SS == 512
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#define SS(fs) 512
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#else
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#if _MAX_SS == 1024 || _MAX_SS == 2048 || _MAX_SS == 4096
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#define SS(fs) ((fs)->s_size)
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#else
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#error Sector size must be 512, 1024, 2048 or 4096.
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#endif
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#endif
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/*
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* File system object structure
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*/
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typedef struct _FATFS {
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BYTE fs_type; /* FAT sub type */
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BYTE drive; /* Physical drive number */
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BYTE csize; /* Number of sectors per cluster */
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BYTE n_fats; /* Number of FAT copies */
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BYTE wflag; /* win[] dirty flag (1:must be written back) */
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BYTE pad1;
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WORD id; /* File system mount ID */
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WORD n_rootdir; /* Number of root directory entries (0 on FAT32) */
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#if _FS_REENTRANT
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_SYNC_t sobj; /* Identifier of sync object */
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#endif
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#if _MAX_SS != 512U
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WORD s_size; /* Sector size */
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#endif
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#if !_FS_READONLY
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BYTE fsi_flag; /* fsinfo dirty flag (1:must be written back) */
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BYTE pad2;
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DWORD last_clust; /* Last allocated cluster */
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DWORD free_clust; /* Number of free clusters */
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DWORD fsi_sector; /* fsinfo sector */
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#endif
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DWORD sects_fat; /* Sectors per fat */
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DWORD max_clust; /* Maximum cluster# + 1. Number of clusters is max_clust - 2 */
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DWORD fatbase; /* FAT start sector */
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DWORD dirbase; /* Root directory start sector (Cluster# on FAT32) */
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DWORD database; /* Data start sector */
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DWORD winsect; /* Current sector appearing in the win[] */
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BYTE win[_MAX_SS]; /* Disk access window for Directory/FAT */
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} FATFS;
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/*
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* Directory object structure
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*/
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typedef struct _DIR {
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WORD id; /* Owner file system mount ID */
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WORD index; /* Current index number */
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FATFS *fs; /* Pointer to the owner file system object */
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DWORD sclust; /* Table start cluster (0:Static table) */
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DWORD clust; /* Current cluster */
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DWORD sect; /* Current sector */
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BYTE *dir; /* Pointer to the current SFN entry in the win[] */
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BYTE *fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
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#if _USE_LFN
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WCHAR *lfn; /* Pointer to the LFN working buffer */
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WORD lfn_idx; /* Last matched LFN index (0xFFFF:No LFN) */
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#endif
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} DIR;
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/*
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* File object structure
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*/
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typedef struct _FIL {
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FATFS *fs; /* Pointer to the owner file system object */
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WORD id; /* Owner file system mount ID */
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BYTE flag; /* File status flags */
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BYTE csect; /* Sector address in the cluster */
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DWORD fptr; /* File R/W pointer */
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DWORD fsize; /* File size */
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DWORD org_clust; /* File start cluster */
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DWORD curr_clust; /* Current cluster */
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DWORD dsect; /* Current data sector */
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#if !_FS_READONLY
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DWORD dir_sect; /* Sector containing the directory entry */
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BYTE *dir_ptr; /* Ponter to the directory entry in the window */
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#endif
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#if !_FS_TINY
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BYTE buf[_MAX_SS]; /* File R/W buffer */
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#endif
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} FIL;
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/*
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* File status structure
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*/
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typedef struct _FILINFO {
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DWORD fsize; /* File size */
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WORD fdate; /* Last modified date */
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WORD ftime; /* Last modified time */
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BYTE fattrib; /* Attribute */
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char fname[13]; /* Short file name (8.3 format) */
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#if _USE_LFN
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char *lfname; /* Pointer to the LFN buffer */
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int lfsize; /* Size of LFN buffer [bytes] */
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#endif
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} FILINFO;
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/*
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* DBCS code ranges
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*/
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#if _CODE_PAGE == 932 /* CP932 (Japanese Shift-JIS) */
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#define _DF1S 0x81 /* DBC 1st byte range 1 start */
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#define _DF1E 0x9F /* DBC 1st byte range 1 end */
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#define _DF2S 0xE0 /* DBC 1st byte range 2 start */
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#define _DF2E 0xFC /* DBC 1st byte range 2 end */
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#define _DS1S 0x40 /* DBC 2nd byte range 1 start */
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#define _DS1E 0x7E /* DBC 2nd byte range 1 end */
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#define _DS2S 0x80 /* DBC 2nd byte range 2 start */
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#define _DS2E 0xFC /* DBC 2nd byte range 2 end */
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#elif _CODE_PAGE == 936 /* CP936 (Simplified Chinese GBK) */
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#define _DF1S 0x81
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#define _DF1E 0xFE
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#define _DS1S 0x40
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#define _DS1E 0x7E
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#define _DS2S 0x80
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#define _DS2E 0xFE
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#elif _CODE_PAGE == 949 /* CP949 (Korean) */
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#define _DF1S 0x81
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#define _DF1E 0xFE
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#define _DS1S 0x41
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#define _DS1E 0x5A
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#define _DS2S 0x61
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#define _DS2E 0x7A
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#define _DS3S 0x81
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#define _DS3E 0xFE
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#elif _CODE_PAGE == 950 /* CP950 (Traditional Chinese Big5) */
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#define _DF1S 0x81
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#define _DF1E 0xFE
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#define _DS1S 0x40
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#define _DS1E 0x7E
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#define _DS2S 0xA1
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#define _DS2E 0xFE
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#else /* SBCS code pages */
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#define _DF1S 0
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#endif
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/*
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* Character code support macros
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*/
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#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
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#define IsLower(c) (((c)>='a')&&((c)<='z'))
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#define IsDigit(c) (((c)>='0')&&((c)<='9'))
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#if _DF1S /* DBCS configuration */
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#if _DF2S /* Two 1st byte areas */
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#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
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#else /* One 1st byte area */
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#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
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#endif
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#if _DS3S /* Three 2nd byte areas */
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#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
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#else /* Two 2nd byte areas */
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#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
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#endif
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#else /* SBCS configuration */
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#define IsDBCS1(c) 0
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#define IsDBCS2(c) 0
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#endif /* _DF1S */
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/*
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* Definitions corresponds to multi partition
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*/
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#if _MULTI_PARTITION /* Multiple partition configuration */
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typedef struct _PARTITION {
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BYTE pd; /* Physical drive# */
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BYTE pt; /* Partition # (0-3) */
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} PARTITION;
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extern
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const PARTITION Drives[]; /* Logical drive# to physical location conversion table */
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#define LD2PD(drv) (Drives[drv].pd) /* Get physical drive# */
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#define LD2PT(drv) (Drives[drv].pt) /* Get partition# */
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#else /* Single partition configuration */
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#define LD2PD(drv) (drv) /* Physical drive# is equal to the logical drive# */
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#define LD2PT(drv) 0 /* Always mounts the 1st partition */
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#endif
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/*
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* File function return code (FRESULT)
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*/
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typedef enum {
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FR_OK = 0, /* 0 */
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FR_DISK_ERR, /* 1 */
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FR_INT_ERR, /* 2 */
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FR_NOT_READY, /* 3 */
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FR_NO_FILE, /* 4 */
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FR_NO_PATH, /* 5 */
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FR_INVALID_NAME, /* 6 */
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FR_DENIED, /* 7 */
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FR_EXIST, /* 8 */
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FR_INVALID_OBJECT, /* 9 */
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FR_WRITE_PROTECTED, /* 10 */
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FR_INVALID_DRIVE, /* 11 */
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FR_NOT_ENABLED, /* 12 */
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FR_NO_FILESYSTEM, /* 13 */
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FR_MKFS_ABORTED, /* 14 */
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FR_TIMEOUT /* 15 */
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} FRESULT;
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/*--------------------------------------------------------------*/
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/*
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* FatFs module application interface
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*/
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FRESULT f_mount(BYTE, FATFS *); /* Mount/Unmount a logical drive */
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FRESULT f_open(FIL *, const char *, BYTE); /* Open or create a file */
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FRESULT f_read(FIL *, void *, UINT, UINT *); /* Read data from a file */
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FRESULT f_write(FIL *, const void *, UINT, UINT *); /* Write data to a file */
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FRESULT f_lseek(FIL *, DWORD); /* Move file pointer of a file object */
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FRESULT f_close(FIL *); /* Close an open file object */
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FRESULT f_opendir(DIR *, const char *); /* Open an existing directory */
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FRESULT f_readdir(DIR *, FILINFO *); /* Read a directory item */
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FRESULT f_stat(const char *, FILINFO *); /* Get file status */
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FRESULT f_getfree(const char *, DWORD *, FATFS **); /* Get number of free clusters on the drive */
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FRESULT f_truncate(FIL *); /* Truncate file */
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FRESULT f_sync(FIL *); /* Flush cached data of a writing file */
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FRESULT f_unlink(const char *); /* Delete an existing file or directory */
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FRESULT f_mkdir(const char *); /* Create a new directory */
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FRESULT f_chmod(const char *, BYTE, BYTE); /* Change attriburte of the file/dir */
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FRESULT f_utime(const char *, const FILINFO *); /* Change timestamp of the file/dir */
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FRESULT f_rename(const char *, const char *); /* Rename/Move a file or directory */
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FRESULT f_forward(FIL *, UINT(*)(const BYTE *, UINT), UINT, UINT *); /* Forward data to the stream */
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FRESULT f_mkfs(BYTE, BYTE, WORD); /* Create a file system on the drive */
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#if _USE_STRFUNC
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int f_putc(int, FIL *); /* Put a character to the file */
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int f_puts(const char *, FIL *); /* Put a string to the file */
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int f_printf(FIL *, const char *, ...); /* Put a formatted string to the file */
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char *f_gets(char *, int, FIL *); /* Get a string from the file */
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#define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0)
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#define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0)
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#ifndef EOF
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#define EOF -1
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#endif
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#endif
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/*--------------------------------------------------------------*/
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/*
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* User defined functions
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*/
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/*
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* Real time clock
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*/
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#if !_FS_READONLY
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DWORD get_fattime(void); /* 31-25: Year(0-127 org.1980), 24-21: Month(1-12), 20-16: Day(1-31) */
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/*
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* 15-11: Hour(0-23), 10-5: Minute(0-59), 4-0: Second(0-29 *2)
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*/
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#endif
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/*
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* Unicode - OEM code conversion
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*/
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#if _USE_LFN
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WCHAR ff_convert(WCHAR, UINT);
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#endif
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/*
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* Sync functions
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*/
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#if _FS_REENTRANT
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BOOL ff_cre_syncobj(BYTE, _SYNC_t *);
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BOOL ff_del_syncobj(_SYNC_t);
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BOOL ff_req_grant(_SYNC_t);
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void ff_rel_grant(_SYNC_t);
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#endif
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/*--------------------------------------------------------------*/
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/*
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* Flags and offset address
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*/
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/*
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* File access control and file status flags (FIL.flag)
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*/
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#define FA_READ 0x01
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#define FA_OPEN_EXISTING 0x00
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#if _FS_READONLY == 0
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#define FA_WRITE 0x02
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#define FA_CREATE_NEW 0x04
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#define FA_CREATE_ALWAYS 0x08
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#define FA_OPEN_ALWAYS 0x10
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#define FA__WRITTEN 0x20
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#define FA__DIRTY 0x40
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#endif
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#define FA__ERROR 0x80
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/*
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* FAT sub type (FATFS.fs_type)
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*/
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#define FS_FAT12 1
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#define FS_FAT16 2
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#define FS_FAT32 3
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/*
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* File attribute bits for directory entry
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*/
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#define AM_RDO 0x01 /* Read only */
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#define AM_HID 0x02 /* Hidden */
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#define AM_SYS 0x04 /* System */
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#define AM_VOL 0x08 /* Volume label */
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#define AM_LFN 0x0F /* LFN entry */
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#define AM_DIR 0x10 /* Directory */
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#define AM_ARC 0x20 /* Archive */
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#define AM_MASK 0x3F /* Mask of defined bits */
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/*
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* FatFs refers the members in the FAT structures with byte offset instead / of structure member because there are incompatibility of the
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* packing option / between various compilers.
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*/
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#define BS_jmpBoot 0
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#define BS_OEMName 3
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#define BPB_BytsPerSec 11
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#define BPB_SecPerClus 13
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#define BPB_RsvdSecCnt 14
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#define BPB_NumFATs 16
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#define BPB_RootEntCnt 17
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#define BPB_TotSec16 19
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#define BPB_Media 21
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#define BPB_FATSz16 22
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#define BPB_SecPerTrk 24
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#define BPB_NumHeads 26
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#define BPB_HiddSec 28
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#define BPB_TotSec32 32
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#define BS_55AA 510
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#define BS_DrvNum 36
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#define BS_BootSig 38
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#define BS_VolID 39
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#define BS_VolLab 43
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#define BS_FilSysType 54
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#define BPB_FATSz32 36
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#define BPB_ExtFlags 40
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#define BPB_FSVer 42
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#define BPB_RootClus 44
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#define BPB_FSInfo 48
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#define BPB_BkBootSec 50
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#define BS_DrvNum32 64
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#define BS_BootSig32 66
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#define BS_VolID32 67
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#define BS_VolLab32 71
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#define BS_FilSysType32 82
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#define FSI_LeadSig 0
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#define FSI_StrucSig 484
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#define FSI_Free_Count 488
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#define FSI_Nxt_Free 492
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#define MBR_Table 446
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#define DIR_Name 0
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#define DIR_Attr 11
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#define DIR_NTres 12
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#define DIR_CrtTime 14
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#define DIR_CrtDate 16
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#define DIR_FstClusHI 20
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#define DIR_WrtTime 22
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#define DIR_WrtDate 24
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#define DIR_FstClusLO 26
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#define DIR_FileSize 28
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#define LDIR_Ord 0
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#define LDIR_Attr 11
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#define LDIR_Type 12
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#define LDIR_Chksum 13
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#define LDIR_FstClusLO 26
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/*--------------------------------*/
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/*
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* Multi-byte word access macros
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*/
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#if _WORD_ACCESS == 1 /* Enable word access to the FAT structure */
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#define LD_WORD(ptr) (WORD)(*(WORD*)(BYTE*)(ptr))
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#define LD_DWORD(ptr) (DWORD)(*(DWORD*)(BYTE*)(ptr))
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#define ST_WORD(ptr,val) *(WORD*)(BYTE*)(ptr)=(WORD)(val)
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#define ST_DWORD(ptr,val) *(DWORD*)(BYTE*)(ptr)=(DWORD)(val)
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#else /* Use byte-by-byte access to the FAT structure */
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#define LD_WORD(ptr) (WORD)(((WORD)*(BYTE*)((ptr)+1)<<8)|(WORD)*(BYTE*)(ptr))
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#define LD_DWORD(ptr) (DWORD)(((DWORD)*(BYTE*)((ptr)+3)<<24)|((DWORD)*(BYTE*)((ptr)+2)<<16)|((WORD)*(BYTE*)((ptr)+1)<<8)|*(BYTE*)(ptr))
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#define ST_WORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8)
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#define ST_DWORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8); *(BYTE*)((ptr)+2)=(BYTE)((DWORD)(val)>>16); *(BYTE*)((ptr)+3)=(BYTE)((DWORD)(val)>>24)
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#endif
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#endif /* _FATFS */
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