ff.h 17 KB

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  1. /*---------------------------------------------------------------------------/
  2. / FatFs - FAT file system module include file R0.07a (C)ChaN, 2009
  3. /----------------------------------------------------------------------------/
  4. / FatFs module is an open source software to implement FAT file system to
  5. / small embedded systems. This is a free software and is opened for education,
  6. / research and commercial developments under license policy of following trems.
  7. /
  8. / Copyright (C) 2009, ChaN, all right reserved.
  9. /
  10. / * The FatFs module is a free software and there is NO WARRANTY.
  11. / * No restriction on use. You can use, modify and redistribute it for
  12. / personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
  13. / * Redistributions of source code must retain the above copyright notice.
  14. /----------------------------------------------------------------------------*/
  15. #include "integer.h"
  16. /*---------------------------------------------------------------------------/
  17. / FatFs Configuration Options
  18. /
  19. / CAUTION! Do not forget to make clean the project after any changes to
  20. / the configuration options.
  21. /
  22. /----------------------------------------------------------------------------*/
  23. #ifndef _FATFS
  24. #define _FATFS
  25. #define _WORD_ACCESS 0
  26. /* The _WORD_ACCESS option defines which access method is used to the word
  27. / data in the FAT structure.
  28. /
  29. / 0: Byte-by-byte access. Always compatible with all platforms.
  30. / 1: Word access. Do not choose this unless following condition is met.
  31. /
  32. / When the byte order on the memory is big-endian or address miss-aligned
  33. / word access results incorrect behavior, the _WORD_ACCESS must be set to 0.
  34. / If it is not the case, the value can also be set to 1 to improve the
  35. / performance and code efficiency. */
  36. #define _FS_READONLY 0
  37. /* Setting _FS_READONLY to 1 defines read only configuration. This removes
  38. / writing functions, f_write, f_sync, f_unlink, f_mkdir, f_chmod, f_rename,
  39. / f_truncate and useless f_getfree. */
  40. #define _FS_MINIMIZE 0
  41. /* The _FS_MINIMIZE option defines minimization level to remove some functions.
  42. /
  43. / 0: Full function.
  44. / 1: f_stat, f_getfree, f_unlink, f_mkdir, f_chmod, f_truncate and f_rename
  45. / are removed.
  46. / 2: f_opendir and f_readdir are removed in addition to level 1.
  47. / 3: f_lseek is removed in addition to level 2. */
  48. #define _FS_TINY 0
  49. /* When _FS_TINY is set to 1, FatFs uses the sector buffer in the file system
  50. / object instead of the sector buffer in the individual file object for file
  51. / data transfer. This reduces memory consumption 512 bytes each file object. */
  52. #define _USE_STRFUNC 0
  53. /* To enable string functions, set _USE_STRFUNC to 1 or 2. */
  54. #define _USE_MKFS 0
  55. /* To enable f_mkfs function, set _USE_MKFS to 1 and set _FS_READONLY to 0 */
  56. #define _USE_FORWARD 0
  57. /* To enable f_forward function, set _USE_FORWARD to 1 and set _FS_TINY to 1. */
  58. #define _DRIVES 1
  59. /* Number of volumes (logical drives) to be used. */
  60. #define _MAX_SS 512
  61. /* Maximum sector size to be handled. (512/1024/2048/4096) */
  62. /* 512 for memroy card and hard disk, 1024 for floppy disk, 2048 for MO disk */
  63. #define _MULTI_PARTITION 0
  64. /* When _MULTI_PARTITION is set to 0, each volume is bound to the same physical
  65. / drive number and can mount only first primaly partition. When it is set to 1,
  66. / each volume is tied to the partitions listed in Drives[]. */
  67. #define _CODE_PAGE 850
  68. /* The _CODE_PAGE specifies the OEM code page to be used on the target system.
  69. / When it is non LFN configuration, there is no difference between SBCS code
  70. / pages. When LFN is enabled, the code page must always be set correctly.
  71. / 437 - U.S.
  72. / 720 - Arabic
  73. / 737 - Greek
  74. / 775 - Baltic
  75. / 850 - Multilingual Latin 1
  76. / 852 - Latin 2
  77. / 855 - Cyrillic
  78. / 857 - Turkish
  79. / 858 - Multilingual Latin 1 + Euro
  80. / 862 - Hebrew
  81. / 866 - Russian
  82. / 874 - Thai
  83. / 932 - Japanese Shift-JIS (DBCS)
  84. / 936 - Simplified Chinese GBK (DBCS)
  85. / 949 - Korean (DBCS)
  86. / 950 - Traditional Chinese Big5 (DBCS)
  87. / 1258 - Vietnam
  88. */
  89. #define _USE_LFN 0
  90. #define _MAX_LFN 255 /* Maximum LFN length to handle (max:255) */
  91. /* The _USE_LFN option switches the LFN support.
  92. /
  93. / 0: Disable LFN.
  94. / 1: Enable LFN with static working buffer on the bss. NOT REENTRANT.
  95. / 2: Enable LFN with dynamic working buffer on the caller's STACK.
  96. /
  97. / The working buffer occupies (_MAX_LFN + 1) * 2 bytes. When enable LFN,
  98. / a Unicode - OEM code conversion function ff_convert() must be added to
  99. / the project. */
  100. #define _FS_REENTRANT 0
  101. #define _TIMEOUT 1000 /* Timeout period in unit of time ticks */
  102. #define _SYNC_t HANDLE /* Type of sync object used on the OS. */
  103. /* e.g. HANDLE, OS_EVENT*, ID and etc.. */
  104. /* To make the FatFs module re-entrant, set _FS_REENTRANT to 1 and add user
  105. / provided synchronization handlers, ff_req_grant, ff_rel_grant,
  106. / ff_del_syncobj and ff_cre_syncobj function to the project. */
  107. /* End of configuration options. Do not change followings without care. */
  108. /*--------------------------------------------------------------------------*/
  109. /* Definitions corresponds to multiple sector size */
  110. #if _MAX_SS == 512
  111. #define SS(fs) 512
  112. #else
  113. #if _MAX_SS == 1024 || _MAX_SS == 2048 || _MAX_SS == 4096
  114. #define SS(fs) ((fs)->s_size)
  115. #else
  116. #error Sector size must be 512, 1024, 2048 or 4096.
  117. #endif
  118. #endif
  119. /* File system object structure */
  120. typedef struct _FATFS {
  121. BYTE fs_type; /* FAT sub type */
  122. BYTE drive; /* Physical drive number */
  123. BYTE csize; /* Number of sectors per cluster */
  124. BYTE n_fats; /* Number of FAT copies */
  125. BYTE wflag; /* win[] dirty flag (1:must be written back) */
  126. BYTE pad1;
  127. WORD id; /* File system mount ID */
  128. WORD n_rootdir; /* Number of root directory entries (0 on FAT32) */
  129. #if _FS_REENTRANT
  130. _SYNC_t sobj; /* Identifier of sync object */
  131. #endif
  132. #if _MAX_SS != 512U
  133. WORD s_size; /* Sector size */
  134. #endif
  135. #if !_FS_READONLY
  136. BYTE fsi_flag; /* fsinfo dirty flag (1:must be written back) */
  137. BYTE pad2;
  138. DWORD last_clust; /* Last allocated cluster */
  139. DWORD free_clust; /* Number of free clusters */
  140. DWORD fsi_sector; /* fsinfo sector */
  141. #endif
  142. DWORD sects_fat; /* Sectors per fat */
  143. DWORD max_clust; /* Maximum cluster# + 1. Number of clusters is max_clust - 2 */
  144. DWORD fatbase; /* FAT start sector */
  145. DWORD dirbase; /* Root directory start sector (Cluster# on FAT32) */
  146. DWORD database; /* Data start sector */
  147. DWORD winsect; /* Current sector appearing in the win[] */
  148. BYTE win[_MAX_SS];/* Disk access window for Directory/FAT */
  149. } FATFS;
  150. /* Directory object structure */
  151. typedef struct _DIR {
  152. WORD id; /* Owner file system mount ID */
  153. WORD index; /* Current index number */
  154. FATFS* fs; /* Pointer to the owner file system object */
  155. DWORD sclust; /* Table start cluster (0:Static table) */
  156. DWORD clust; /* Current cluster */
  157. DWORD sect; /* Current sector */
  158. BYTE* dir; /* Pointer to the current SFN entry in the win[] */
  159. BYTE* fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
  160. #if _USE_LFN
  161. WCHAR* lfn; /* Pointer to the LFN working buffer */
  162. WORD lfn_idx; /* Last matched LFN index (0xFFFF:No LFN) */
  163. #endif
  164. } DIR;
  165. /* File object structure */
  166. typedef struct _FIL {
  167. FATFS* fs; /* Pointer to the owner file system object */
  168. WORD id; /* Owner file system mount ID */
  169. BYTE flag; /* File status flags */
  170. BYTE csect; /* Sector address in the cluster */
  171. DWORD fptr; /* File R/W pointer */
  172. DWORD fsize; /* File size */
  173. DWORD org_clust; /* File start cluster */
  174. DWORD curr_clust; /* Current cluster */
  175. DWORD dsect; /* Current data sector */
  176. #if !_FS_READONLY
  177. DWORD dir_sect; /* Sector containing the directory entry */
  178. BYTE* dir_ptr; /* Ponter to the directory entry in the window */
  179. #endif
  180. #if !_FS_TINY
  181. BYTE buf[_MAX_SS];/* File R/W buffer */
  182. #endif
  183. } FIL;
  184. /* File status structure */
  185. typedef struct _FILINFO {
  186. DWORD fsize; /* File size */
  187. WORD fdate; /* Last modified date */
  188. WORD ftime; /* Last modified time */
  189. BYTE fattrib; /* Attribute */
  190. char fname[13]; /* Short file name (8.3 format) */
  191. #if _USE_LFN
  192. char *lfname; /* Pointer to the LFN buffer */
  193. int lfsize; /* Size of LFN buffer [bytes] */
  194. #endif
  195. } FILINFO;
  196. /* DBCS code ranges */
  197. #if _CODE_PAGE == 932 /* CP932 (Japanese Shift-JIS) */
  198. #define _DF1S 0x81 /* DBC 1st byte range 1 start */
  199. #define _DF1E 0x9F /* DBC 1st byte range 1 end */
  200. #define _DF2S 0xE0 /* DBC 1st byte range 2 start */
  201. #define _DF2E 0xFC /* DBC 1st byte range 2 end */
  202. #define _DS1S 0x40 /* DBC 2nd byte range 1 start */
  203. #define _DS1E 0x7E /* DBC 2nd byte range 1 end */
  204. #define _DS2S 0x80 /* DBC 2nd byte range 2 start */
  205. #define _DS2E 0xFC /* DBC 2nd byte range 2 end */
  206. #elif _CODE_PAGE == 936 /* CP936 (Simplified Chinese GBK) */
  207. #define _DF1S 0x81
  208. #define _DF1E 0xFE
  209. #define _DS1S 0x40
  210. #define _DS1E 0x7E
  211. #define _DS2S 0x80
  212. #define _DS2E 0xFE
  213. #elif _CODE_PAGE == 949 /* CP949 (Korean) */
  214. #define _DF1S 0x81
  215. #define _DF1E 0xFE
  216. #define _DS1S 0x41
  217. #define _DS1E 0x5A
  218. #define _DS2S 0x61
  219. #define _DS2E 0x7A
  220. #define _DS3S 0x81
  221. #define _DS3E 0xFE
  222. #elif _CODE_PAGE == 950 /* CP950 (Traditional Chinese Big5) */
  223. #define _DF1S 0x81
  224. #define _DF1E 0xFE
  225. #define _DS1S 0x40
  226. #define _DS1E 0x7E
  227. #define _DS2S 0xA1
  228. #define _DS2E 0xFE
  229. #else /* SBCS code pages */
  230. #define _DF1S 0
  231. #endif
  232. /* Character code support macros */
  233. #define IsUpper(c) (((c)>='A')&&((c)<='Z'))
  234. #define IsLower(c) (((c)>='a')&&((c)<='z'))
  235. #define IsDigit(c) (((c)>='0')&&((c)<='9'))
  236. #if _DF1S /* DBCS configuration */
  237. #if _DF2S /* Two 1st byte areas */
  238. #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
  239. #else /* One 1st byte area */
  240. #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
  241. #endif
  242. #if _DS3S /* Three 2nd byte areas */
  243. #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
  244. #else /* Two 2nd byte areas */
  245. #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
  246. #endif
  247. #else /* SBCS configuration */
  248. #define IsDBCS1(c) 0
  249. #define IsDBCS2(c) 0
  250. #endif /* _DF1S */
  251. /* Definitions corresponds to multi partition */
  252. #if _MULTI_PARTITION /* Multiple partition configuration */
  253. typedef struct _PARTITION {
  254. BYTE pd; /* Physical drive# */
  255. BYTE pt; /* Partition # (0-3) */
  256. } PARTITION;
  257. extern
  258. const PARTITION Drives[]; /* Logical drive# to physical location conversion table */
  259. #define LD2PD(drv) (Drives[drv].pd) /* Get physical drive# */
  260. #define LD2PT(drv) (Drives[drv].pt) /* Get partition# */
  261. #else /* Single partition configuration */
  262. #define LD2PD(drv) (drv) /* Physical drive# is equal to the logical drive# */
  263. #define LD2PT(drv) 0 /* Always mounts the 1st partition */
  264. #endif
  265. /* File function return code (FRESULT) */
  266. typedef enum {
  267. FR_OK = 0, /* 0 */
  268. FR_DISK_ERR, /* 1 */
  269. FR_INT_ERR, /* 2 */
  270. FR_NOT_READY, /* 3 */
  271. FR_NO_FILE, /* 4 */
  272. FR_NO_PATH, /* 5 */
  273. FR_INVALID_NAME, /* 6 */
  274. FR_DENIED, /* 7 */
  275. FR_EXIST, /* 8 */
  276. FR_INVALID_OBJECT, /* 9 */
  277. FR_WRITE_PROTECTED, /* 10 */
  278. FR_INVALID_DRIVE, /* 11 */
  279. FR_NOT_ENABLED, /* 12 */
  280. FR_NO_FILESYSTEM, /* 13 */
  281. FR_MKFS_ABORTED, /* 14 */
  282. FR_TIMEOUT /* 15 */
  283. } FRESULT;
  284. /*--------------------------------------------------------------*/
  285. /* FatFs module application interface */
  286. FRESULT f_mount (BYTE, FATFS*); /* Mount/Unmount a logical drive */
  287. FRESULT f_open (FIL*, const char*, BYTE); /* Open or create a file */
  288. FRESULT f_read (FIL*, void*, UINT, UINT*); /* Read data from a file */
  289. FRESULT f_write (FIL*, const void*, UINT, UINT*); /* Write data to a file */
  290. FRESULT f_lseek (FIL*, DWORD); /* Move file pointer of a file object */
  291. FRESULT f_close (FIL*); /* Close an open file object */
  292. FRESULT f_opendir (DIR*, const char*); /* Open an existing directory */
  293. FRESULT f_readdir (DIR*, FILINFO*); /* Read a directory item */
  294. FRESULT f_stat (const char*, FILINFO*); /* Get file status */
  295. FRESULT f_getfree (const char*, DWORD*, FATFS**); /* Get number of free clusters on the drive */
  296. FRESULT f_truncate (FIL*); /* Truncate file */
  297. FRESULT f_sync (FIL*); /* Flush cached data of a writing file */
  298. FRESULT f_unlink (const char*); /* Delete an existing file or directory */
  299. FRESULT f_mkdir (const char*); /* Create a new directory */
  300. FRESULT f_chmod (const char*, BYTE, BYTE); /* Change attriburte of the file/dir */
  301. FRESULT f_utime (const char*, const FILINFO*); /* Change timestamp of the file/dir */
  302. FRESULT f_rename (const char*, const char*); /* Rename/Move a file or directory */
  303. FRESULT f_forward (FIL*, UINT(*)(const BYTE*,UINT), UINT, UINT*); /* Forward data to the stream */
  304. FRESULT f_mkfs (BYTE, BYTE, WORD); /* Create a file system on the drive */
  305. #if _USE_STRFUNC
  306. int f_putc (int, FIL*); /* Put a character to the file */
  307. int f_puts (const char*, FIL*); /* Put a string to the file */
  308. int f_printf (FIL*, const char*, ...); /* Put a formatted string to the file */
  309. char* f_gets (char*, int, FIL*); /* Get a string from the file */
  310. #define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0)
  311. #define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0)
  312. #ifndef EOF
  313. #define EOF -1
  314. #endif
  315. #endif
  316. /*--------------------------------------------------------------*/
  317. /* User defined functions */
  318. /* Real time clock */
  319. #if !_FS_READONLY
  320. DWORD get_fattime (void); /* 31-25: Year(0-127 org.1980), 24-21: Month(1-12), 20-16: Day(1-31) */
  321. /* 15-11: Hour(0-23), 10-5: Minute(0-59), 4-0: Second(0-29 *2) */
  322. #endif
  323. /* Unicode - OEM code conversion */
  324. #if _USE_LFN
  325. WCHAR ff_convert (WCHAR, UINT);
  326. #endif
  327. /* Sync functions */
  328. #if _FS_REENTRANT
  329. BOOL ff_cre_syncobj(BYTE, _SYNC_t*);
  330. BOOL ff_del_syncobj(_SYNC_t);
  331. BOOL ff_req_grant(_SYNC_t);
  332. void ff_rel_grant(_SYNC_t);
  333. #endif
  334. /*--------------------------------------------------------------*/
  335. /* Flags and offset address */
  336. /* File access control and file status flags (FIL.flag) */
  337. #define FA_READ 0x01
  338. #define FA_OPEN_EXISTING 0x00
  339. #if _FS_READONLY == 0
  340. #define FA_WRITE 0x02
  341. #define FA_CREATE_NEW 0x04
  342. #define FA_CREATE_ALWAYS 0x08
  343. #define FA_OPEN_ALWAYS 0x10
  344. #define FA__WRITTEN 0x20
  345. #define FA__DIRTY 0x40
  346. #endif
  347. #define FA__ERROR 0x80
  348. /* FAT sub type (FATFS.fs_type) */
  349. #define FS_FAT12 1
  350. #define FS_FAT16 2
  351. #define FS_FAT32 3
  352. /* File attribute bits for directory entry */
  353. #define AM_RDO 0x01 /* Read only */
  354. #define AM_HID 0x02 /* Hidden */
  355. #define AM_SYS 0x04 /* System */
  356. #define AM_VOL 0x08 /* Volume label */
  357. #define AM_LFN 0x0F /* LFN entry */
  358. #define AM_DIR 0x10 /* Directory */
  359. #define AM_ARC 0x20 /* Archive */
  360. #define AM_MASK 0x3F /* Mask of defined bits */
  361. /* FatFs refers the members in the FAT structures with byte offset instead
  362. / of structure member because there are incompatibility of the packing option
  363. / between various compilers. */
  364. #define BS_jmpBoot 0
  365. #define BS_OEMName 3
  366. #define BPB_BytsPerSec 11
  367. #define BPB_SecPerClus 13
  368. #define BPB_RsvdSecCnt 14
  369. #define BPB_NumFATs 16
  370. #define BPB_RootEntCnt 17
  371. #define BPB_TotSec16 19
  372. #define BPB_Media 21
  373. #define BPB_FATSz16 22
  374. #define BPB_SecPerTrk 24
  375. #define BPB_NumHeads 26
  376. #define BPB_HiddSec 28
  377. #define BPB_TotSec32 32
  378. #define BS_55AA 510
  379. #define BS_DrvNum 36
  380. #define BS_BootSig 38
  381. #define BS_VolID 39
  382. #define BS_VolLab 43
  383. #define BS_FilSysType 54
  384. #define BPB_FATSz32 36
  385. #define BPB_ExtFlags 40
  386. #define BPB_FSVer 42
  387. #define BPB_RootClus 44
  388. #define BPB_FSInfo 48
  389. #define BPB_BkBootSec 50
  390. #define BS_DrvNum32 64
  391. #define BS_BootSig32 66
  392. #define BS_VolID32 67
  393. #define BS_VolLab32 71
  394. #define BS_FilSysType32 82
  395. #define FSI_LeadSig 0
  396. #define FSI_StrucSig 484
  397. #define FSI_Free_Count 488
  398. #define FSI_Nxt_Free 492
  399. #define MBR_Table 446
  400. #define DIR_Name 0
  401. #define DIR_Attr 11
  402. #define DIR_NTres 12
  403. #define DIR_CrtTime 14
  404. #define DIR_CrtDate 16
  405. #define DIR_FstClusHI 20
  406. #define DIR_WrtTime 22
  407. #define DIR_WrtDate 24
  408. #define DIR_FstClusLO 26
  409. #define DIR_FileSize 28
  410. #define LDIR_Ord 0
  411. #define LDIR_Attr 11
  412. #define LDIR_Type 12
  413. #define LDIR_Chksum 13
  414. #define LDIR_FstClusLO 26
  415. /*--------------------------------*/
  416. /* Multi-byte word access macros */
  417. #if _WORD_ACCESS == 1 /* Enable word access to the FAT structure */
  418. #define LD_WORD(ptr) (WORD)(*(WORD*)(BYTE*)(ptr))
  419. #define LD_DWORD(ptr) (DWORD)(*(DWORD*)(BYTE*)(ptr))
  420. #define ST_WORD(ptr,val) *(WORD*)(BYTE*)(ptr)=(WORD)(val)
  421. #define ST_DWORD(ptr,val) *(DWORD*)(BYTE*)(ptr)=(DWORD)(val)
  422. #else /* Use byte-by-byte access to the FAT structure */
  423. #define LD_WORD(ptr) (WORD)(((WORD)*(BYTE*)((ptr)+1)<<8)|(WORD)*(BYTE*)(ptr))
  424. #define LD_DWORD(ptr) (DWORD)(((DWORD)*(BYTE*)((ptr)+3)<<24)|((DWORD)*(BYTE*)((ptr)+2)<<16)|((WORD)*(BYTE*)((ptr)+1)<<8)|*(BYTE*)(ptr))
  425. #define ST_WORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8)
  426. #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)
  427. #endif
  428. #endif /* _FATFS */