160 lines
4.9 KiB
C
160 lines
4.9 KiB
C
/*---------------------------------------------------------------------------/
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/ Petit FatFs - FAT file system module include file R0.03 (C)ChaN, 2014
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/----------------------------------------------------------------------------/
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/ Petit 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) 2014, ChaN, all right reserved.
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/
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/ * The Petit 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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/----------------------------------------------------------------------------*/
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#ifndef _PFATFS
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#define _PFATFS 4004 /* Revision ID */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "integer.h"
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#include "pffconf.h"
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#if _PFATFS != _PFFCONF
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#error Wrong configuration file (pffconf.h).
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#endif
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#if _FS_FAT32
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#define CLUST DWORD
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#else
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#define CLUST WORD
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#endif
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/* File system object structure */
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typedef struct {
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BYTE fs_type; /* FAT sub type */
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BYTE flag; /* File status flags */
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BYTE csize; /* Number of sectors per cluster */
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BYTE pad1;
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WORD n_rootdir; /* Number of root directory entries (0 on FAT32) */
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CLUST n_fatent; /* Number of FAT entries (= number of clusters + 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 fptr; /* File R/W pointer */
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DWORD fsize; /* File size */
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CLUST org_clust; /* File start cluster */
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CLUST curr_clust; /* File current cluster */
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DWORD dsect; /* File current data sector */
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} FATFS;
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/* Directory object structure */
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typedef struct {
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WORD index; /* Current read/write index number */
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BYTE* fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
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CLUST sclust; /* Table start cluster (0:Static table) */
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CLUST clust; /* Current cluster */
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DWORD sect; /* Current sector */
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} DIR;
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/* File status structure */
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typedef struct {
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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]; /* File name */
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} FILINFO;
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/* File function return code (FRESULT) */
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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_NOT_READY, /* 2 */
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FR_NO_FILE, /* 3 */
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FR_NOT_OPENED, /* 4 */
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FR_NOT_ENABLED, /* 5 */
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FR_NO_FILESYSTEM /* 6 */
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} FRESULT;
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/*--------------------------------------------------------------*/
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/* Petit FatFs module application interface */
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FRESULT pf_mount (FATFS* fs); /* Mount/Unmount a logical drive */
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FRESULT pf_open (const char* path); /* Open a file */
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FRESULT pf_read (void* buff, UINT btr, UINT* br); /* Read data from the open file */
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FRESULT pf_write (const void* buff, UINT btw, UINT* bw); /* Write data to the open file */
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FRESULT pf_lseek (DWORD ofs); /* Move file pointer of the open file */
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FRESULT pf_opendir (DIR* dj, const char* path); /* Open a directory */
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FRESULT pf_readdir (DIR* dj, FILINFO* fno); /* Read a directory item from the open directory */
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/*--------------------------------------------------------------*/
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/* Flags and offset address */
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/* File status flag (FATFS.flag) */
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#define FA_OPENED 0x01
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#define FA_WPRT 0x02
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#define FA__WIP 0x40
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/* FAT sub type (FATFS.fs_type) */
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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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/* 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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#define AM_MASK 0x3F /* Mask of defined bits */
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/*--------------------------------*/
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/* Multi-byte word access macros */
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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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#ifdef __cplusplus
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}
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#endif
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#endif /* _PFATFS */
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