187 lines
6.3 KiB
C
187 lines
6.3 KiB
C
/*--------------------------------------------------------------------------/
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/ Tiny-FatFs - FAT file system module include file R0.03 (C)ChaN, 2006
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/---------------------------------------------------------------------------/
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/ FatFs module is an experimenal project to implement FAT file system to
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/ cheap microcontrollers. This is a free software and is opened for education,
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/ research and development. You can use, modify and/or republish it for
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/ non-profit or profit use without any restriction under your responsibility.
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/---------------------------------------------------------------------------*/
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#ifndef _FATFS
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//#define _BYTE_ACC
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/* The _BYTE_ACC enables byte-by-byte access for multi-byte variables. This
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/ MUST be defined when multi-byte variable is stored in big-endian and/or
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/ address miss-aligned access is prohibited. */
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//#define _FS_READONLY
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/* Read only configuration. This removes writing functions, f_write, f_sync,
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/ f_unlink, f_mkdir, f_chmod, f_rename and g_getfree. */
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#define _FS_MINIMIZE 0
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/* The _FS_MINIMIZE defines minimization level to remove some functions.
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/ 0: Not minimized.
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/ 1: f_stat, f_getfree, f_unlink, f_mkdir, f_chmod and f_rename are removed.
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/ 2: f_opendir and f_readdir are removed in addition to level 1. */
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#define _USE_SJIS
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/* When _USE_SJIS is defined, Shift-JIS code transparency is enabled, otherwise
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/ only US-ASCII(7bit) code can be accepted as file/directory name. */
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#include "integer.h"
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/* Result type for fatfs application interface */
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typedef unsigned char FRESULT;
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/* File system object structure */
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typedef struct _FATFS {
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BYTE fs_type; /* FAT type */
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BYTE files; /* Number of files currently opend */
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BYTE sects_clust; /* Sectors per cluster */
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BYTE n_fats; /* Number of FAT copies */
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WORD n_rootdir; /* Number of root directory entry */
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BYTE winflag; /* win[] dirty flag (1:must be written back) */
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BYTE pad1;
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WORD sects_fat; /* Sectors per fat */
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WORD max_clust; /* Maximum cluster# + 1 */
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DWORD fatbase; /* FAT start sector */
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DWORD dirbase; /* Root directory start sector (cluster# for 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[512]; /* Disk access window for Directory/FAT/File */
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} FATFS;
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/* Directory object structure */
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typedef struct _DIR {
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WORD sclust; /* Start cluster */
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WORD clust; /* Current cluster */
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DWORD sect; /* Current sector */
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WORD index; /* Current index */
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} DIR;
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/* File object structure */
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typedef struct _FIL {
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DWORD fptr; /* File R/W pointer */
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DWORD fsize; /* File size */
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WORD org_clust; /* File start cluster */
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WORD curr_clust; /* Current cluster */
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DWORD curr_sect; /* Current sector */
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#ifndef _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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BYTE flag; /* File status flags */
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BYTE sect_clust; /* Left sectors in cluster */
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} FIL;
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/* File status structure */
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typedef struct _FILINFO {
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DWORD fsize; /* Size */
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WORD fdate; /* Date */
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WORD ftime; /* Time */
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BYTE fattrib; /* Attribute */
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char fname[8+1+3+1]; /* Name (8.3 format) */
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} FILINFO;
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/*-----------------------------------------------------*/
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/* FatFs module application interface */
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extern FATFS *FatFs; /* Pointer to active file system object */
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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*, WORD, WORD*); /* Read file */
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FRESULT f_close (FIL*); /* Close file */
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FRESULT f_lseek (FIL*, DWORD); /* Seek file pointer */
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FRESULT f_opendir (DIR*, const char*); /* Open a 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 (DWORD*); /* Get number of free clusters */
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FRESULT f_mountdrv (void); /* Force initialized the file system */
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FRESULT f_write (FIL*, const void*, WORD, WORD*); /* Write 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 a file or directory */
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FRESULT f_mkdir (const char*); /* Create a directory */
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FRESULT f_chmod (const char*, BYTE, BYTE); /* Change file attriburte */
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FRESULT f_rename (const char*, const char*); /* Rename a file or directory */
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/* User defined function to give a current time to fatfs module */
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DWORD get_fattime(void); /* 31-25: Year(0-127 +1980), 24-21: Month(1-12), 20-16: Day(1-31) */
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/* 15-11: Hour(0-23), 10-5: Minute(0-59), 4-0: Second(0-29 *2) */
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/* File function return code (FRESULT) */
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#define FR_OK 0
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#define FR_NOT_READY 1
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#define FR_NO_FILE 2
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#define FR_NO_PATH 3
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#define FR_INVALID_NAME 4
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#define FR_DENIED 5
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#define FR_DISK_FULL 6
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#define FR_RW_ERROR 7
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#define FR_INCORRECT_DISK_CHANGE 8
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#define FR_WRITE_PROTECTED 9
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#define FR_NOT_ENABLED 10
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#define FR_NO_FILESYSTEM 11
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/* File access control and file status flags (FIL.flag) */
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#define FA_READ 0x01
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#define FA_OPEN_EXISTING 0x00
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#ifndef _FS_READONLY
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#define FA_WRITE 0x02
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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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#endif
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#define FA__ERROR 0x80
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/* FAT type signature (FATFS.fs_type) */
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#define FS_FAT12 1
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#define FS_FAT16 2
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/* File attribute bits for directory entry */
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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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/* Multi-byte word access macros */
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#ifdef _BYTE_ACC
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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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#else
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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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#endif
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#define _FATFS
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#endif
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