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Rev 242 → Rev 243
/src/common/fatfs/ff.h
0,0 → 1,337
/*---------------------------------------------------------------------------/ |
/ FatFs - FAT file system module include file R0.09a (C)ChaN, 2012 |
/----------------------------------------------------------------------------/ |
/ FatFs module is a generic FAT file system module for small embedded systems. |
/ This is a free software that opened for education, research and commercial |
/ developments under license policy of following terms. |
/ |
/ Copyright (C) 2012, ChaN, all right reserved. |
/ |
/ * The FatFs module is a free software and there is NO WARRANTY. |
/ * No restriction on use. You can use, modify and redistribute it for |
/ personal, non-profit or commercial product UNDER YOUR RESPONSIBILITY. |
/ * Redistributions of source code must retain the above copyright notice. |
/ |
/----------------------------------------------------------------------------*/ |
|
#ifndef _FATFS |
#define _FATFS 4004 /* Revision ID */ |
|
#ifdef __cplusplus |
extern "C" { |
#endif |
|
#include "integer.h" /* Basic integer types */ |
#include "ffconf.h" /* FatFs configuration options */ |
|
#if _FATFS != _FFCONF |
#error Wrong configuration file (ffconf.h). |
#endif |
|
|
|
/* Definitions of volume management */ |
|
#if _MULTI_PARTITION /* Multiple partition configuration */ |
typedef struct { |
BYTE pd; /* Physical drive number */ |
BYTE pt; /* Partition: 0:Auto detect, 1-4:Forced partition) */ |
} PARTITION; |
extern PARTITION VolToPart[]; /* Volume - Partition resolution table */ |
#define LD2PD(vol) (VolToPart[vol].pd) /* Get physical drive number */ |
#define LD2PT(vol) (VolToPart[vol].pt) /* Get partition index */ |
|
#else /* Single partition configuration */ |
#define LD2PD(vol) (BYTE)(vol) /* Each logical drive is bound to the same physical drive number */ |
#define LD2PT(vol) 0 /* Always mounts the 1st partition or in SFD */ |
|
#endif |
|
|
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/* Type of path name strings on FatFs API */ |
|
#if _LFN_UNICODE /* Unicode string */ |
#if !_USE_LFN |
#error _LFN_UNICODE must be 0 in non-LFN cfg. |
#endif |
#ifndef _INC_TCHAR |
typedef WCHAR TCHAR; |
#define _T(x) L ## x |
#define _TEXT(x) L ## x |
#endif |
|
#else /* ANSI/OEM string */ |
#ifndef _INC_TCHAR |
typedef char TCHAR; |
#define _T(x) x |
#define _TEXT(x) x |
#endif |
|
#endif |
|
|
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/* 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; |
|
|
|
/* File object structure (FIL) */ |
|
typedef struct { |
FATFS* fs; /* Pointer to the related file system object */ |
WORD id; /* File system mount ID of the related file system object */ |
BYTE flag; /* File status flags */ |
BYTE pad1; |
DWORD fptr; /* File read/write pointer (0ed on file open) */ |
DWORD fsize; /* File size */ |
DWORD sclust; /* File data start cluster (0:no data cluster, always 0 when fsize is 0) */ |
DWORD clust; /* Current cluster of fpter */ |
DWORD dsect; /* Current data sector of fpter */ |
#if !_FS_READONLY |
DWORD dir_sect; /* Sector containing the directory entry */ |
BYTE* dir_ptr; /* Pointer to the directory entry in the window */ |
#endif |
#if _USE_FASTSEEK |
DWORD* cltbl; /* Pointer to the cluster link map table (null on file open) */ |
#endif |
#if _FS_LOCK |
UINT lockid; /* File lock ID (index of file semaphore table Files[]) */ |
#endif |
#if !_FS_TINY |
BYTE buf[_MAX_SS]; /* File data read/write buffer */ |
#endif |
} FIL; |
|
|
|
/* Directory object structure (DIR) */ |
|
typedef struct { |
FATFS* fs; /* Pointer to the owner file system object */ |
WORD id; /* Owner file system mount ID */ |
WORD index; /* Current read/write index number */ |
DWORD sclust; /* Table start cluster (0:Root dir) */ |
DWORD clust; /* Current cluster */ |
DWORD sect; /* Current sector */ |
BYTE* dir; /* Pointer to the current SFN entry in the win[] */ |
BYTE* fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */ |
#if _USE_LFN |
WCHAR* lfn; /* Pointer to the LFN working buffer */ |
WORD lfn_idx; /* Last matched LFN index number (0xFFFF:No LFN) */ |
#endif |
} DIR; |
|
|
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/* File status structure (FILINFO) */ |
|
typedef struct { |
DWORD fsize; /* File size */ |
WORD fdate; /* Last modified date */ |
WORD ftime; /* Last modified time */ |
BYTE fattrib; /* Attribute */ |
TCHAR fname[13]; /* Short file name (8.3 format) */ |
#if _USE_LFN |
TCHAR* lfname; /* Pointer to the LFN buffer */ |
UINT lfsize; /* Size of LFN buffer in TCHAR */ |
#endif |
} FILINFO; |
|
|
|
/* File function return code (FRESULT) */ |
|
typedef enum { |
FR_OK = 0, /* (0) Succeeded */ |
FR_DISK_ERR, /* (1) A hard error occurred in the low level disk I/O layer */ |
FR_INT_ERR, /* (2) Assertion failed */ |
FR_NOT_READY, /* (3) The physical drive cannot work */ |
FR_NO_FILE, /* (4) Could not find the file */ |
FR_NO_PATH, /* (5) Could not find the path */ |
FR_INVALID_NAME, /* (6) The path name format is invalid */ |
FR_DENIED, /* (7) Access denied due to prohibited access or directory full */ |
FR_EXIST, /* (8) Access denied due to prohibited access */ |
FR_INVALID_OBJECT, /* (9) The file/directory object is invalid */ |
FR_WRITE_PROTECTED, /* (10) The physical drive is write protected */ |
FR_INVALID_DRIVE, /* (11) The logical drive number is invalid */ |
FR_NOT_ENABLED, /* (12) The volume has no work area */ |
FR_NO_FILESYSTEM, /* (13) There is no valid FAT volume */ |
FR_MKFS_ABORTED, /* (14) The f_mkfs() aborted due to any parameter error */ |
FR_TIMEOUT, /* (15) Could not get a grant to access the volume within defined period */ |
FR_LOCKED, /* (16) The operation is rejected according to the file sharing policy */ |
FR_NOT_ENOUGH_CORE, /* (17) LFN working buffer could not be allocated */ |
FR_TOO_MANY_OPEN_FILES, /* (18) Number of open files > _FS_SHARE */ |
FR_INVALID_PARAMETER /* (19) Given parameter is invalid */ |
} FRESULT; |
|
|
|
/*--------------------------------------------------------------*/ |
/* FatFs module application interface */ |
|
FRESULT f_mount (BYTE, FATFS*); /* Mount/Unmount a logical drive */ |
FRESULT f_open (FIL*, const TCHAR*, BYTE); /* Open or create a file */ |
FRESULT f_read (FIL*, void*, UINT, UINT*); /* Read data from a file */ |
FRESULT f_lseek (FIL*, DWORD); /* Move file pointer of a file object */ |
FRESULT f_close (FIL*); /* Close an open file object */ |
FRESULT f_opendir (DIR*, const TCHAR*); /* Open an existing directory */ |
FRESULT f_readdir (DIR*, FILINFO*); /* Read a directory item */ |
FRESULT f_stat (const TCHAR*, FILINFO*); /* Get file status */ |
FRESULT f_write (FIL*, const void*, UINT, UINT*); /* Write data to a file */ |
FRESULT f_getfree (const TCHAR*, DWORD*, FATFS**); /* Get number of free clusters on the drive */ |
FRESULT f_truncate (FIL*); /* Truncate file */ |
FRESULT f_sync (FIL*); /* Flush cached data of a writing file */ |
FRESULT f_unlink (const TCHAR*); /* Delete an existing file or directory */ |
FRESULT f_mkdir (const TCHAR*); /* Create a new directory */ |
FRESULT f_chmod (const TCHAR*, BYTE, BYTE); /* Change attribute of the file/dir */ |
FRESULT f_utime (const TCHAR*, const FILINFO*); /* Change times-tamp of the file/dir */ |
FRESULT f_rename (const TCHAR*, const TCHAR*); /* Rename/Move a file or directory */ |
FRESULT f_chdrive (BYTE); /* Change current drive */ |
FRESULT f_chdir (const TCHAR*); /* Change current directory */ |
FRESULT f_getcwd (TCHAR*, UINT); /* Get current directory */ |
FRESULT f_forward (FIL*, UINT(*)(const BYTE*,UINT), UINT, UINT*); /* Forward data to the stream */ |
FRESULT f_mkfs (BYTE, BYTE, UINT); /* Create a file system on the drive */ |
FRESULT f_fdisk (BYTE, const DWORD[], void*); /* Divide a physical drive into some partitions */ |
int f_putc (TCHAR, FIL*); /* Put a character to the file */ |
int f_puts (const TCHAR*, FIL*); /* Put a string to the file */ |
int f_printf (FIL*, const TCHAR*, ...); /* Put a formatted string to the file */ |
TCHAR* f_gets (TCHAR*, int, FIL*); /* Get a string from the file */ |
|
#define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0) |
#define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0) |
#define f_tell(fp) ((fp)->fptr) |
#define f_size(fp) ((fp)->fsize) |
|
#ifndef EOF |
#define EOF (-1) |
#endif |
|
|
|
|
/*--------------------------------------------------------------*/ |
/* Additional user defined functions */ |
|
/* RTC function */ |
#if !_FS_READONLY |
DWORD get_fattime (void); |
#endif |
|
/* Unicode support functions */ |
#if _USE_LFN /* Unicode - OEM code conversion */ |
WCHAR ff_convert (WCHAR, UINT); /* OEM-Unicode bidirectional conversion */ |
WCHAR ff_wtoupper (WCHAR); /* Unicode upper-case conversion */ |
#if _USE_LFN == 3 /* Memory functions */ |
void* ff_memalloc (UINT); /* Allocate memory block */ |
void ff_memfree (void*); /* Free memory block */ |
#endif |
#endif |
|
/* Sync functions */ |
#if _FS_REENTRANT |
int ff_cre_syncobj (BYTE, _SYNC_t*);/* Create a sync object */ |
int ff_req_grant (_SYNC_t); /* Lock sync object */ |
void ff_rel_grant (_SYNC_t); /* Unlock sync object */ |
int ff_del_syncobj (_SYNC_t); /* Delete a sync object */ |
#endif |
|
|
|
|
/*--------------------------------------------------------------*/ |
/* Flags and offset address */ |
|
|
/* File access control and file status flags (FIL.flag) */ |
|
#define FA_READ 0x01 |
#define FA_OPEN_EXISTING 0x00 |
#define FA__ERROR 0x80 |
|
#if !_FS_READONLY |
#define FA_WRITE 0x02 |
#define FA_CREATE_NEW 0x04 |
#define FA_CREATE_ALWAYS 0x08 |
#define FA_OPEN_ALWAYS 0x10 |
#define FA__WRITTEN 0x20 |
#define FA__DIRTY 0x40 |
#endif |
|
|
/* FAT sub type (FATFS.fs_type) */ |
|
#define FS_FAT12 1 |
#define FS_FAT16 2 |
#define FS_FAT32 3 |
|
|
/* File attribute bits for directory entry */ |
|
#define AM_RDO 0x01 /* Read only */ |
#define AM_HID 0x02 /* Hidden */ |
#define AM_SYS 0x04 /* System */ |
#define AM_VOL 0x08 /* Volume label */ |
#define AM_LFN 0x0F /* LFN entry */ |
#define AM_DIR 0x10 /* Directory */ |
#define AM_ARC 0x20 /* Archive */ |
#define AM_MASK 0x3F /* Mask of defined bits */ |
|
|
/* Fast seek feature */ |
#define CREATE_LINKMAP 0xFFFFFFFF |
|
|
|
/*--------------------------------*/ |
/* Multi-byte word access macros */ |
|
#if _WORD_ACCESS == 1 /* Enable word access to the FAT structure */ |
#define LD_WORD(ptr) (WORD)(*(WORD*)(BYTE*)(ptr)) |
#define LD_DWORD(ptr) (DWORD)(*(DWORD*)(BYTE*)(ptr)) |
#define ST_WORD(ptr,val) *(WORD*)(BYTE*)(ptr)=(WORD)(val) |
#define ST_DWORD(ptr,val) *(DWORD*)(BYTE*)(ptr)=(DWORD)(val) |
#else /* Use byte-by-byte access to the FAT structure */ |
#define LD_WORD(ptr) (WORD)(((WORD)*((BYTE*)(ptr)+1)<<8)|(WORD)*(BYTE*)(ptr)) |
#define LD_DWORD(ptr) (DWORD)(((DWORD)*((BYTE*)(ptr)+3)<<24)|((DWORD)*((BYTE*)(ptr)+2)<<16)|((WORD)*((BYTE*)(ptr)+1)<<8)|*(BYTE*)(ptr)) |
#define ST_WORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *((BYTE*)(ptr)+1)=(BYTE)((WORD)(val)>>8) |
#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) |
#endif |
|
#ifdef __cplusplus |
} |
#endif |
|
#endif /* _FATFS */ |
/src/common/fatfs/mmcbb.c
0,0 → 1,577
/*------------------------------------------------------------------------/ |
/ Bitbanging MMCv3/SDv1/SDv2 (in SPI mode) control module |
/-------------------------------------------------------------------------/ |
/ |
/ Copyright (C) 2012, ChaN, all right reserved. |
/ |
/ * This software is a free software and there is NO WARRANTY. |
/ * No restriction on use. You can use, modify and redistribute it for |
/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. |
/ * Redistributions of source code must retain the above copyright notice. |
/ |
/--------------------------------------------------------------------------/ |
Features and Limitations: |
|
* Very Easy to Port |
It uses only 4 bit of GPIO port. No interrupt, no SPI port is used. |
|
* Platform Independent |
You need to modify only a few macros to control GPIO ports. |
|
* Low Speed |
The data transfer rate will be several times slower than hardware SPI. |
|
/-------------------------------------------------------------------------*/ |
|
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#include "diskio.h" /* Common include file for FatFs and disk I/O layer */ |
|
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/*-------------------------------------------------------------------------*/ |
/* Platform dependent macros and functions needed to be modified */ |
/*-------------------------------------------------------------------------*/ |
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void dly_us(unsigned n); |
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#include "../libsoc/src/hw.h" |
|
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#define SDPO *((volatile unsigned int *)GPIO_P0) |
#define SDPI *((volatile unsigned int *)GPIO_P1) |
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/* Initialize MMC control port (CS=H, CLK=L, DI=H, DO=in) */ |
#define INIT_PORT() SDPO = 0x05 |
#define DLY_US(n) dly_us(n) /* Delay n microseconds */ |
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|
#define CS_H() SDPO |= 0x00000001 /* Set MMC CS "high" */ |
#define CS_L() SDPO &= 0xFFFFFFFE /* Set MMC CS "low" */ |
#define CK_H() SDPO |= 0x00000002 /* Set MMC SCLK "high" */ |
#define CK_L() SDPO &= 0xFFFFFFFD /* Set MMC SCLK "low" */ |
#define DI_H() SDPO |= 0x00000004 /* Set MMC DI "high" */ |
#define DI_L() SDPO &= 0xFFFFFFFB /* Set MMC DI "low" */ |
#define DO (SDPI & 0x00000001) /* Test for MMC DO ('H':true) */ |
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|
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/*-------------------------------------------------------------------------- |
|
Module Private Functions |
|
---------------------------------------------------------------------------*/ |
|
/* MMC/SD command (SPI mode) */ |
#define CMD0 (0) /* GO_IDLE_STATE */ |
#define CMD1 (1) /* SEND_OP_COND */ |
#define ACMD41 (0x80+41) /* SEND_OP_COND (SDC) */ |
#define CMD8 (8) /* SEND_IF_COND */ |
#define CMD9 (9) /* SEND_CSD */ |
#define CMD10 (10) /* SEND_CID */ |
#define CMD12 (12) /* STOP_TRANSMISSION */ |
#define CMD13 (13) /* SEND_STATUS */ |
#define ACMD13 (0x80+13) /* SD_STATUS (SDC) */ |
#define CMD16 (16) /* SET_BLOCKLEN */ |
#define CMD17 (17) /* READ_SINGLE_BLOCK */ |
#define CMD18 (18) /* READ_MULTIPLE_BLOCK */ |
#define CMD23 (23) /* SET_BLOCK_COUNT */ |
#define ACMD23 (0x80+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */ |
#define CMD24 (24) /* WRITE_BLOCK */ |
#define CMD25 (25) /* WRITE_MULTIPLE_BLOCK */ |
#define CMD41 (41) /* SEND_OP_COND (ACMD) */ |
#define CMD55 (55) /* APP_CMD */ |
#define CMD58 (58) /* READ_OCR */ |
|
/* Card type flags (CardType) */ |
#define CT_MMC 0x01 /* MMC ver 3 */ |
#define CT_SD1 0x02 /* SD ver 1 */ |
#define CT_SD2 0x04 /* SD ver 2 */ |
#define CT_SDC 0x06 /* SD */ |
#define CT_BLOCK 0x08 /* Block addressing */ |
|
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static |
DSTATUS Stat = STA_NOINIT; /* Disk status */ |
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static |
BYTE CardType; /* b0:MMC, b1:SDv1, b2:SDv2, b3:Block addressing */ |
|
|
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/*-----------------------------------------------------------------------*/ |
/* Transmit bytes to the card (bitbanging) */ |
/*-----------------------------------------------------------------------*/ |
|
static |
void xmit_mmc ( |
const BYTE* buff, /* Data to be sent */ |
UINT bc /* Number of bytes to send */ |
) |
{ |
BYTE d; |
|
|
do { |
d = *buff++; /* Get a byte to be sent */ |
if (d & 0x80) DI_H(); else DI_L(); /* bit7 */ |
CK_H(); CK_L(); |
if (d & 0x40) DI_H(); else DI_L(); /* bit6 */ |
CK_H(); CK_L(); |
if (d & 0x20) DI_H(); else DI_L(); /* bit5 */ |
CK_H(); CK_L(); |
if (d & 0x10) DI_H(); else DI_L(); /* bit4 */ |
CK_H(); CK_L(); |
if (d & 0x08) DI_H(); else DI_L(); /* bit3 */ |
CK_H(); CK_L(); |
if (d & 0x04) DI_H(); else DI_L(); /* bit2 */ |
CK_H(); CK_L(); |
if (d & 0x02) DI_H(); else DI_L(); /* bit1 */ |
CK_H(); CK_L(); |
if (d & 0x01) DI_H(); else DI_L(); /* bit0 */ |
CK_H(); CK_L(); |
} while (--bc); |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Receive bytes from the card (bitbanging) */ |
/*-----------------------------------------------------------------------*/ |
|
static |
void rcvr_mmc ( |
BYTE *buff, /* Pointer to read buffer */ |
UINT bc /* Number of bytes to receive */ |
) |
{ |
BYTE r; |
|
|
DI_H(); /* Send 0xFF */ |
|
do { |
r = 0; if (DO) r++; /* bit7 */ |
CK_H(); CK_L(); |
r <<= 1; if (DO) r++; /* bit6 */ |
CK_H(); CK_L(); |
r <<= 1; if (DO) r++; /* bit5 */ |
CK_H(); CK_L(); |
r <<= 1; if (DO) r++; /* bit4 */ |
CK_H(); CK_L(); |
r <<= 1; if (DO) r++; /* bit3 */ |
CK_H(); CK_L(); |
r <<= 1; if (DO) r++; /* bit2 */ |
CK_H(); CK_L(); |
r <<= 1; if (DO) r++; /* bit1 */ |
CK_H(); CK_L(); |
r <<= 1; if (DO) r++; /* bit0 */ |
CK_H(); CK_L(); |
*buff++ = r; /* Store a received byte */ |
} while (--bc); |
} |
|
|
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/*-----------------------------------------------------------------------*/ |
/* Wait for card ready */ |
/*-----------------------------------------------------------------------*/ |
|
static |
int wait_ready (void) /* 1:OK, 0:Timeout */ |
{ |
BYTE d; |
UINT tmr; |
|
|
for (tmr = 5000; tmr; tmr--) { /* Wait for ready in timeout of 500ms */ |
rcvr_mmc(&d, 1); |
if (d == 0xFF) break; |
DLY_US(100); |
} |
|
return tmr ? 1 : 0; |
} |
|
|
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/*-----------------------------------------------------------------------*/ |
/* Deselect the card and release SPI bus */ |
/*-----------------------------------------------------------------------*/ |
|
static |
void deselect (void) |
{ |
BYTE d; |
|
CS_H(); |
rcvr_mmc(&d, 1); /* Dummy clock (force DO hi-z for multiple slave SPI) */ |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Select the card and wait for ready */ |
/*-----------------------------------------------------------------------*/ |
|
static |
int select (void) /* 1:OK, 0:Timeout */ |
{ |
BYTE d; |
|
CS_L(); |
rcvr_mmc(&d, 1); /* Dummy clock (force DO enabled) */ |
|
if (wait_ready()) return 1; /* OK */ |
deselect(); |
return 0; /* Failed */ |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Receive a data packet from the card */ |
/*-----------------------------------------------------------------------*/ |
|
static |
int rcvr_datablock ( /* 1:OK, 0:Failed */ |
BYTE *buff, /* Data buffer to store received data */ |
UINT btr /* Byte count */ |
) |
{ |
BYTE d[2]; |
UINT tmr; |
|
|
for (tmr = 1000; tmr; tmr--) { /* Wait for data packet in timeout of 100ms */ |
rcvr_mmc(d, 1); |
if (d[0] != 0xFF) break; |
DLY_US(100); |
} |
if (d[0] != 0xFE) return 0; /* If not valid data token, return with error */ |
|
rcvr_mmc(buff, btr); /* Receive the data block into buffer */ |
rcvr_mmc(d, 2); /* Discard CRC */ |
|
return 1; /* Return with success */ |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Send a data packet to the card */ |
/*-----------------------------------------------------------------------*/ |
|
static |
int xmit_datablock ( /* 1:OK, 0:Failed */ |
const BYTE *buff, /* 512 byte data block to be transmitted */ |
BYTE token /* Data/Stop token */ |
) |
{ |
BYTE d[2]; |
|
|
if (!wait_ready()) return 0; |
|
d[0] = token; |
xmit_mmc(d, 1); /* Xmit a token */ |
if (token != 0xFD) { /* Is it data token? */ |
xmit_mmc(buff, 512); /* Xmit the 512 byte data block to MMC */ |
rcvr_mmc(d, 2); /* Xmit dummy CRC (0xFF,0xFF) */ |
rcvr_mmc(d, 1); /* Receive data response */ |
if ((d[0] & 0x1F) != 0x05) /* If not accepted, return with error */ |
return 0; |
} |
|
return 1; |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Send a command packet to the card */ |
/*-----------------------------------------------------------------------*/ |
|
static |
BYTE send_cmd ( /* Returns command response (bit7==1:Send failed)*/ |
BYTE cmd, /* Command byte */ |
DWORD arg /* Argument */ |
) |
{ |
BYTE n, d, buf[6]; |
|
|
if (cmd & 0x80) { /* ACMD<n> is the command sequense of CMD55-CMD<n> */ |
cmd &= 0x7F; |
n = send_cmd(CMD55, 0); |
if (n > 1) return n; |
} |
|
/* Select the card and wait for ready */ |
deselect(); |
if (!select()) return 0xFF; |
|
/* Send a command packet */ |
buf[0] = 0x40 | cmd; /* Start + Command index */ |
buf[1] = (BYTE)(arg >> 24); /* Argument[31..24] */ |
buf[2] = (BYTE)(arg >> 16); /* Argument[23..16] */ |
buf[3] = (BYTE)(arg >> 8); /* Argument[15..8] */ |
buf[4] = (BYTE)arg; /* Argument[7..0] */ |
n = 0x01; /* Dummy CRC + Stop */ |
if (cmd == CMD0) n = 0x95; /* (valid CRC for CMD0(0)) */ |
if (cmd == CMD8) n = 0x87; /* (valid CRC for CMD8(0x1AA)) */ |
buf[5] = n; |
xmit_mmc(buf, 6); |
|
/* Receive command response */ |
if (cmd == CMD12) rcvr_mmc(&d, 1); /* Skip a stuff byte when stop reading */ |
n = 10; /* Wait for a valid response in timeout of 10 attempts */ |
do |
rcvr_mmc(&d, 1); |
while ((d & 0x80) && --n); |
|
return d; /* Return with the response value */ |
} |
|
|
|
/*-------------------------------------------------------------------------- |
|
Public Functions |
|
---------------------------------------------------------------------------*/ |
|
|
/*-----------------------------------------------------------------------*/ |
/* Get Disk Status */ |
/*-----------------------------------------------------------------------*/ |
|
DSTATUS disk_status ( |
BYTE drv /* Drive number (always 0) */ |
) |
{ |
DSTATUS s; |
BYTE d; |
|
|
if (drv) return STA_NOINIT; |
|
/* Check if the card is kept initialized */ |
s = Stat; |
if (!(s & STA_NOINIT)) { |
if (send_cmd(CMD13, 0)) /* Read card status */ |
s = STA_NOINIT; |
rcvr_mmc(&d, 1); /* Receive following half of R2 */ |
deselect(); |
} |
Stat = s; |
|
return s; |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Initialize Disk Drive */ |
/*-----------------------------------------------------------------------*/ |
|
DSTATUS disk_initialize ( |
BYTE drv /* Physical drive nmuber (0) */ |
) |
{ |
BYTE n, ty, cmd, buf[4]; |
UINT tmr; |
DSTATUS s; |
|
|
if (drv) return RES_NOTRDY; |
|
INIT_PORT(); /* Initialize control port */ |
for (n = 10; n; n--) rcvr_mmc(buf, 1); /* 80 dummy clocks */ |
|
ty = 0; |
if (send_cmd(CMD0, 0) == 1) { /* Enter Idle state */ |
if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2? */ |
rcvr_mmc(buf, 4); /* Get trailing return value of R7 resp */ |
if (buf[2] == 0x01 && buf[3] == 0xAA) { /* The card can work at vdd range of 2.7-3.6V */ |
for (tmr = 1000; tmr; tmr--) { /* Wait for leaving idle state (ACMD41 with HCS bit) */ |
if (send_cmd(ACMD41, 1UL << 30) == 0) break; |
DLY_US(1000); |
} |
if (tmr && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */ |
rcvr_mmc(buf, 4); |
ty = (buf[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* SDv2 */ |
} |
} |
} else { /* SDv1 or MMCv3 */ |
if (send_cmd(ACMD41, 0) <= 1) { |
ty = CT_SD1; cmd = ACMD41; /* SDv1 */ |
} else { |
ty = CT_MMC; cmd = CMD1; /* MMCv3 */ |
} |
for (tmr = 1000; tmr; tmr--) { /* Wait for leaving idle state */ |
if (send_cmd(cmd, 0) == 0) break; |
DLY_US(1000); |
} |
if (!tmr || send_cmd(CMD16, 512) != 0) /* Set R/W block length to 512 */ |
ty = 0; |
} |
} |
CardType = ty; |
s = ty ? 0 : STA_NOINIT; |
Stat = s; |
|
deselect(); |
|
return s; |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Read Sector(s) */ |
/*-----------------------------------------------------------------------*/ |
|
DRESULT disk_read ( |
BYTE drv, /* Physical drive nmuber (0) */ |
BYTE *buff, /* Pointer to the data buffer to store read data */ |
DWORD sector, /* Start sector number (LBA) */ |
BYTE count /* Sector count (1..128) */ |
) |
{ |
if (disk_status(drv) & STA_NOINIT) return RES_NOTRDY; |
if (!count) return RES_PARERR; |
if (!(CardType & CT_BLOCK)) sector *= 512; /* Convert LBA to byte address if needed */ |
|
if (count == 1) { /* Single block read */ |
if ((send_cmd(CMD17, sector) == 0) /* READ_SINGLE_BLOCK */ |
&& rcvr_datablock(buff, 512)) |
count = 0; |
} |
else { /* Multiple block read */ |
if (send_cmd(CMD18, sector) == 0) { /* READ_MULTIPLE_BLOCK */ |
do { |
if (!rcvr_datablock(buff, 512)) break; |
buff += 512; |
} while (--count); |
send_cmd(CMD12, 0); /* STOP_TRANSMISSION */ |
} |
} |
deselect(); |
|
return count ? RES_ERROR : RES_OK; |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Write Sector(s) */ |
/*-----------------------------------------------------------------------*/ |
|
DRESULT disk_write ( |
BYTE drv, /* Physical drive nmuber (0) */ |
const BYTE *buff, /* Pointer to the data to be written */ |
DWORD sector, /* Start sector number (LBA) */ |
BYTE count /* Sector count (1..128) */ |
) |
{ |
if (disk_status(drv) & STA_NOINIT) return RES_NOTRDY; |
if (!count) return RES_PARERR; |
if (!(CardType & CT_BLOCK)) sector *= 512; /* Convert LBA to byte address if needed */ |
|
if (count == 1) { /* Single block write */ |
if ((send_cmd(CMD24, sector) == 0) /* WRITE_BLOCK */ |
&& xmit_datablock(buff, 0xFE)) |
count = 0; |
} |
else { /* Multiple block write */ |
if (CardType & CT_SDC) send_cmd(ACMD23, count); |
if (send_cmd(CMD25, sector) == 0) { /* WRITE_MULTIPLE_BLOCK */ |
do { |
if (!xmit_datablock(buff, 0xFC)) break; |
buff += 512; |
} while (--count); |
if (!xmit_datablock(0, 0xFD)) /* STOP_TRAN token */ |
count = 1; |
} |
} |
deselect(); |
|
return count ? RES_ERROR : RES_OK; |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Miscellaneous Functions */ |
/*-----------------------------------------------------------------------*/ |
|
DRESULT disk_ioctl ( |
BYTE drv, /* Physical drive nmuber (0) */ |
BYTE ctrl, /* Control code */ |
void *buff /* Buffer to send/receive control data */ |
) |
{ |
DRESULT res; |
BYTE n, csd[16]; |
DWORD cs; |
|
|
if (disk_status(drv) & STA_NOINIT) return RES_NOTRDY; /* Check if card is in the socket */ |
|
res = RES_ERROR; |
switch (ctrl) { |
case CTRL_SYNC : /* Make sure that no pending write process */ |
if (select()) { |
deselect(); |
res = RES_OK; |
} |
break; |
|
case GET_SECTOR_COUNT : /* Get number of sectors on the disk (DWORD) */ |
if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) { |
if ((csd[0] >> 6) == 1) { /* SDC ver 2.00 */ |
cs = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 8) + 1; |
*(DWORD*)buff = cs << 10; |
} else { /* SDC ver 1.XX or MMC */ |
n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2; |
cs = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1; |
*(DWORD*)buff = cs << (n - 9); |
} |
res = RES_OK; |
} |
break; |
|
case GET_BLOCK_SIZE : /* Get erase block size in unit of sector (DWORD) */ |
*(DWORD*)buff = 128; |
res = RES_OK; |
break; |
|
default: |
res = RES_PARERR; |
} |
|
deselect(); |
|
return res; |
} |
|
|
|
void dly_us(unsigned n){ |
volatile unsigned i; |
volatile static unsigned j = 0; |
|
for(i=0;i<40*n;i++){ |
j = i + 7; |
} |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* This function is defined for only project compatibility */ |
|
void disk_timerproc (void) |
{ |
/* Nothing to do */ |
} |
|
/src/common/fatfs/integer.h
0,0 → 1,37
/*-------------------------------------------*/ |
/* Integer type definitions for FatFs module */ |
/*-------------------------------------------*/ |
|
#ifndef _INTEGER |
#define _INTEGER |
|
#ifdef _WIN32 /* FatFs development platform */ |
|
#include <windows.h> |
#include <tchar.h> |
|
#else /* Embedded platform */ |
|
/* These types must be 16-bit, 32-bit or larger integer */ |
typedef int INT; |
typedef unsigned int UINT; |
|
/* These types must be 8-bit integer */ |
typedef char CHAR; |
typedef unsigned char UCHAR; |
typedef unsigned char BYTE; |
|
/* These types must be 16-bit integer */ |
typedef short SHORT; |
typedef unsigned short USHORT; |
typedef unsigned short WORD; |
typedef unsigned short WCHAR; |
|
/* These types must be 32-bit integer */ |
typedef long LONG; |
typedef unsigned long ULONG; |
typedef unsigned long DWORD; |
|
#endif |
|
#endif |
/src/common/fatfs/ffconf.h
0,0 → 1,190
/*---------------------------------------------------------------------------/ |
/ FatFs - FAT file system module configuration file R0.09a (C)ChaN, 2012 |
/----------------------------------------------------------------------------/ |
/ |
/ CAUTION! Do not forget to make clean the project after any changes to |
/ the configuration options. |
/ |
/----------------------------------------------------------------------------*/ |
#ifndef _FFCONF |
#define _FFCONF 4004 /* Revision ID */ |
|
|
/*---------------------------------------------------------------------------/ |
/ Functions and Buffer Configurations |
/----------------------------------------------------------------------------*/ |
|
#define _FS_TINY 0 /* 0:Normal or 1:Tiny */ |
/* 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 object for file |
/ data transfer. This reduces memory consumption 512 bytes each file object. */ |
|
|
#define _FS_READONLY 1 /* 0:Read/Write or 1:Read only */ |
/* Setting _FS_READONLY to 1 defines read only configuration. This removes |
/ writing functions, f_write, f_sync, f_unlink, f_mkdir, f_chmod, f_rename, |
/ f_truncate and useless f_getfree. */ |
|
|
#define _FS_MINIMIZE 1 /* 0 to 3 */ |
/* The _FS_MINIMIZE option defines minimization level to remove some functions. |
/ |
/ 0: Full function. |
/ 1: f_stat, f_getfree, f_unlink, f_mkdir, f_chmod, f_truncate and f_rename |
/ are removed. |
/ 2: f_opendir and f_readdir are removed in addition to 1. |
/ 3: f_lseek is removed in addition to 2. */ |
|
|
#define _USE_STRFUNC 0 /* 0:Disable or 1-2:Enable */ |
/* To enable string functions, set _USE_STRFUNC to 1 or 2. */ |
|
|
#define _USE_MKFS 0 /* 0:Disable or 1:Enable */ |
/* To enable f_mkfs function, set _USE_MKFS to 1 and set _FS_READONLY to 0 */ |
|
|
#define _USE_FORWARD 0 /* 0:Disable or 1:Enable */ |
/* To enable f_forward function, set _USE_FORWARD to 1 and set _FS_TINY to 1. */ |
|
|
#define _USE_FASTSEEK 0 /* 0:Disable or 1:Enable */ |
/* To enable fast seek feature, set _USE_FASTSEEK to 1. */ |
|
|
|
/*---------------------------------------------------------------------------/ |
/ Locale and Namespace Configurations |
/----------------------------------------------------------------------------*/ |
|
#define _CODE_PAGE 932 |
/* The _CODE_PAGE specifies the OEM code page to be used on the target system. |
/ Incorrect setting of the code page can cause a file open failure. |
/ |
/ 932 - Japanese Shift-JIS (DBCS, OEM, Windows) |
/ 936 - Simplified Chinese GBK (DBCS, OEM, Windows) |
/ 949 - Korean (DBCS, OEM, Windows) |
/ 950 - Traditional Chinese Big5 (DBCS, OEM, Windows) |
/ 1250 - Central Europe (Windows) |
/ 1251 - Cyrillic (Windows) |
/ 1252 - Latin 1 (Windows) |
/ 1253 - Greek (Windows) |
/ 1254 - Turkish (Windows) |
/ 1255 - Hebrew (Windows) |
/ 1256 - Arabic (Windows) |
/ 1257 - Baltic (Windows) |
/ 1258 - Vietnam (OEM, Windows) |
/ 437 - U.S. (OEM) |
/ 720 - Arabic (OEM) |
/ 737 - Greek (OEM) |
/ 775 - Baltic (OEM) |
/ 850 - Multilingual Latin 1 (OEM) |
/ 858 - Multilingual Latin 1 + Euro (OEM) |
/ 852 - Latin 2 (OEM) |
/ 855 - Cyrillic (OEM) |
/ 866 - Russian (OEM) |
/ 857 - Turkish (OEM) |
/ 862 - Hebrew (OEM) |
/ 874 - Thai (OEM, Windows) |
/ 1 - ASCII only (Valid for non LFN cfg.) |
*/ |
|
|
#define _USE_LFN 0 /* 0 to 3 */ |
#define _MAX_LFN 255 /* Maximum LFN length to handle (12 to 255) */ |
/* The _USE_LFN option switches the LFN support. |
/ |
/ 0: Disable LFN feature. _MAX_LFN and _LFN_UNICODE have no effect. |
/ 1: Enable LFN with static working buffer on the BSS. Always NOT reentrant. |
/ 2: Enable LFN with dynamic working buffer on the STACK. |
/ 3: Enable LFN with dynamic working buffer on the HEAP. |
/ |
/ The LFN working buffer occupies (_MAX_LFN + 1) * 2 bytes. To enable LFN, |
/ Unicode handling functions ff_convert() and ff_wtoupper() must be added |
/ to the project. When enable to use heap, memory control functions |
/ ff_memalloc() and ff_memfree() must be added to the project. */ |
|
|
#define _LFN_UNICODE 0 /* 0:ANSI/OEM or 1:Unicode */ |
/* To switch the character code set on FatFs API to Unicode, |
/ enable LFN feature and set _LFN_UNICODE to 1. */ |
|
|
#define _FS_RPATH 0 /* 0 to 2 */ |
/* The _FS_RPATH option configures relative path feature. |
/ |
/ 0: Disable relative path feature and remove related functions. |
/ 1: Enable relative path. f_chdrive() and f_chdir() are available. |
/ 2: f_getcwd() is available in addition to 1. |
/ |
/ Note that output of the f_readdir fnction is affected by this option. */ |
|
|
|
/*---------------------------------------------------------------------------/ |
/ Physical Drive Configurations |
/----------------------------------------------------------------------------*/ |
|
#define _VOLUMES 1 |
/* Number of volumes (logical drives) to be used. */ |
|
|
#define _MAX_SS 512 /* 512, 1024, 2048 or 4096 */ |
/* Maximum sector size to be handled. |
/ Always set 512 for memory card and hard disk but a larger value may be |
/ required for on-board flash memory, floppy disk and optical disk. |
/ When _MAX_SS is larger than 512, it configures FatFs to variable sector size |
/ and GET_SECTOR_SIZE command must be implememted to the disk_ioctl function. */ |
|
|
#define _MULTI_PARTITION 0 /* 0:Single partition, 1/2:Enable multiple partition */ |
/* When set to 0, each volume is bound to the same physical drive number and |
/ it can mount only first primaly partition. When it is set to 1, each volume |
/ is tied to the partitions listed in VolToPart[]. */ |
|
|
#define _USE_ERASE 0 /* 0:Disable or 1:Enable */ |
/* To enable sector erase feature, set _USE_ERASE to 1. CTRL_ERASE_SECTOR command |
/ should be added to the disk_ioctl functio. */ |
|
|
|
/*---------------------------------------------------------------------------/ |
/ System Configurations |
/----------------------------------------------------------------------------*/ |
|
#define _WORD_ACCESS 0 /* 0 or 1 */ |
/* Set 0 first and it is always compatible with all platforms. The _WORD_ACCESS |
/ option defines which access method is used to the word data on the FAT volume. |
/ |
/ 0: Byte-by-byte access. |
/ 1: Word access. Do not choose this unless following condition is met. |
/ |
/ When the byte order on the 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 the case, the value can also be set to 1 to improve the |
/ performance and code size. |
*/ |
|
|
/* A header file that defines sync object types on the O/S, such as |
/ windows.h, ucos_ii.h and semphr.h, must be included prior to ff.h. */ |
|
#define _FS_REENTRANT 0 /* 0:Disable or 1:Enable */ |
#define _FS_TIMEOUT 1000 /* Timeout period in unit of time ticks */ |
#define _SYNC_t HANDLE /* O/S dependent type of sync object. e.g. HANDLE, OS_EVENT*, ID and etc.. */ |
|
/* The _FS_REENTRANT option switches the reentrancy (thread safe) of the FatFs module. |
/ |
/ 0: Disable reentrancy. _SYNC_t and _FS_TIMEOUT have no effect. |
/ 1: Enable reentrancy. Also user provided synchronization handlers, |
/ ff_req_grant, ff_rel_grant, ff_del_syncobj and ff_cre_syncobj |
/ function must be added to the project. */ |
|
|
#define _FS_LOCK 0 /* 0:Disable or >=1:Enable */ |
/* To enable file lock control feature, set _FS_LOCK to 1 or greater. |
The value defines how many files can be opened simultaneously. */ |
|
|
#endif /* _FFCONFIG */ |
/src/common/fatfs/diskio.h
0,0 → 1,51
/*----------------------------------------------------------------------- |
/ Low level disk interface modlue include file (C)ChaN, 2009 |
/-----------------------------------------------------------------------*/ |
|
#ifndef _DISKIO |
#define _DISKIO |
|
#include "integer.h" |
|
|
/* Status of Disk Functions */ |
typedef BYTE DSTATUS; |
|
/* Results of Disk Functions */ |
typedef enum { |
RES_OK = 0, /* 0: Successful */ |
RES_ERROR, /* 1: R/W Error */ |
RES_WRPRT, /* 2: Write Protected */ |
RES_NOTRDY, /* 3: Not Ready */ |
RES_PARERR /* 4: Invalid Parameter */ |
} DRESULT; |
|
|
/*---------------------------------------*/ |
/* Prototypes for disk control functions */ |
|
int assign_drives (int, int); |
DSTATUS disk_initialize (BYTE); |
DSTATUS disk_status (BYTE); |
DRESULT disk_read (BYTE, BYTE*, DWORD, BYTE); |
DRESULT disk_write (BYTE, const BYTE*, DWORD, BYTE); |
DRESULT disk_ioctl (BYTE, BYTE, void*); |
|
|
|
/* Disk Status Bits (DSTATUS) */ |
|
#define STA_NOINIT 0x01 /* Drive not initialized */ |
#define STA_NODISK 0x02 /* No medium in the drive */ |
#define STA_PROTECT 0x04 /* Write protected */ |
|
|
/* Command code for disk_ioctrl fucntion */ |
|
/* Generic command (mandatory for FatFs) */ |
#define CTRL_SYNC 0 /* Flush disk cache (for write functions) */ |
#define GET_SECTOR_COUNT 1 /* Get media size (for only f_mkfs()) */ |
#define GET_SECTOR_SIZE 2 /* Get sector size (for multiple sector size (_MAX_SS >= 1024)) */ |
#define GET_BLOCK_SIZE 3 /* Get erase block size (for only f_mkfs()) */ |
|
#endif |
/src/common/fatfs/ff.c
0,0 → 1,4162
/*----------------------------------------------------------------------------/ |
/ FatFs - FAT file system module R0.09a (C)ChaN, 2012 |
/-----------------------------------------------------------------------------/ |
/ FatFs module is a generic FAT file system module for small embedded systems. |
/ This is a free software that opened for education, research and commercial |
/ developments under license policy of following terms. |
/ |
/ Copyright (C) 2012, ChaN, all right reserved. |
/ |
/ * The FatFs module is a free software and there is NO WARRANTY. |
/ * No restriction on use. You can use, modify and redistribute it for |
/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. |
/ * Redistributions of source code must retain the above copyright notice. |
/ |
/-----------------------------------------------------------------------------/ |
/ Feb 26,'06 R0.00 Prototype. |
/ |
/ Apr 29,'06 R0.01 First stable version. |
/ |
/ Jun 01,'06 R0.02 Added FAT12 support. |
/ Removed unbuffered mode. |
/ Fixed a problem on small (<32M) partition. |
/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). |
/ |
/ Sep 22,'06 R0.03 Added f_rename(). |
/ Changed option _FS_MINIMUM to _FS_MINIMIZE. |
/ Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast. |
/ Fixed f_mkdir() creates incorrect directory on FAT32. |
/ |
/ Feb 04,'07 R0.04 Supported multiple drive system. |
/ Changed some interfaces for multiple drive system. |
/ Changed f_mountdrv() to f_mount(). |
/ Added f_mkfs(). |
/ Apr 01,'07 R0.04a Supported multiple partitions on a physical drive. |
/ Added a capability of extending file size to f_lseek(). |
/ Added minimization level 3. |
/ Fixed an endian sensitive code in f_mkfs(). |
/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. |
/ Added FSInfo support. |
/ Fixed DBCS name can result FR_INVALID_NAME. |
/ Fixed short seek (<= csize) collapses the file object. |
/ |
/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). |
/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo. |
/ Fixed f_mkdir() on FAT32 creates incorrect directory. |
/ Feb 03,'08 R0.05a Added f_truncate() and f_utime(). |
/ Fixed off by one error at FAT sub-type determination. |
/ Fixed btr in f_read() can be mistruncated. |
/ Fixed cached sector is not flushed when create and close without write. |
/ |
/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). |
/ Improved performance of f_lseek() on moving to the same or following cluster. |
/ |
/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY) |
/ Added long file name feature. |
/ Added multiple code page feature. |
/ Added re-entrancy for multitask operation. |
/ Added auto cluster size selection to f_mkfs(). |
/ Added rewind option to f_readdir(). |
/ Changed result code of critical errors. |
/ Renamed string functions to avoid name collision. |
/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg. |
/ Added multiple sector size feature. |
/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error. |
/ Fixed wrong cache control in f_lseek(). |
/ Added relative path feature. |
/ Added f_chdir() and f_chdrive(). |
/ Added proper case conversion to extended char. |
/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h. |
/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH. |
/ Fixed name matching error on the 13 char boundary. |
/ Added a configuration option, _LFN_UNICODE. |
/ Changed f_readdir() to return the SFN with always upper case on non-LFN cfg. |
/ |
/ May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3) |
/ Added file lock feature. (_FS_SHARE) |
/ Added fast seek feature. (_USE_FASTSEEK) |
/ Changed some types on the API, XCHAR->TCHAR. |
/ Changed fname member in the FILINFO structure on Unicode cfg. |
/ String functions support UTF-8 encoding files on Unicode cfg. |
/ Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2) |
/ Added sector erase feature. (_USE_ERASE) |
/ Moved file lock semaphore table from fs object to the bss. |
/ Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'. |
/ Fixed f_mkfs() creates wrong FAT32 volume. |
/ Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write(). |
/ f_lseek() reports required table size on creating CLMP. |
/ Extended format syntax of f_printf function. |
/ Ignores duplicated directory separators in given path name. |
/ |
/ Sep 06,'11 R0.09 f_mkfs() supports multiple partition to finish the multiple partition feature. |
/ Added f_fdisk(). (_MULTI_PARTITION = 2) |
/ Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume. |
/ Changed f_open() and f_opendir reject null object pointer to avoid crash. |
/ Changed option name _FS_SHARE to _FS_LOCK. |
/---------------------------------------------------------------------------*/ |
|
#include <stdio.h> |
#include "ff.h" /* FatFs configurations and declarations */ |
#include "diskio.h" /* Declarations of low level disk I/O functions */ |
|
|
/*-------------------------------------------------------------------------- |
|
Module Private Definitions |
|
---------------------------------------------------------------------------*/ |
|
#if _FATFS != 4004 /* Revision ID */ |
#error Wrong include file (ff.h). |
#endif |
|
|
/* Definitions on sector size */ |
#if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096 |
#error Wrong sector size. |
#endif |
#if _MAX_SS != 512 |
#define SS(fs) ((fs)->ssize) /* Variable sector size */ |
#else |
#define SS(fs) 512U /* Fixed sector size */ |
#endif |
|
|
/* Reentrancy related */ |
#if _FS_REENTRANT |
#if _USE_LFN == 1 |
#error Static LFN work area must not be used in re-entrant configuration. |
#endif |
#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } |
#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } |
#else |
#define ENTER_FF(fs) |
#define LEAVE_FF(fs, res) return res |
#endif |
|
#define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); } |
|
|
/* File access control feature */ |
#if _FS_LOCK |
#if _FS_READONLY |
#error _FS_LOCK must be 0 on read-only cfg. |
#endif |
typedef struct { |
FATFS *fs; /* File ID 1, volume (NULL:blank entry) */ |
DWORD clu; /* File ID 2, directory */ |
WORD idx; /* File ID 3, directory index */ |
WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */ |
} FILESEM; |
#endif |
|
|
|
/* DBCS code ranges and SBCS extend char conversion table */ |
|
#if _CODE_PAGE == 932 /* Japanese Shift-JIS */ |
#define _DF1S 0x81 /* DBC 1st byte range 1 start */ |
#define _DF1E 0x9F /* DBC 1st byte range 1 end */ |
#define _DF2S 0xE0 /* DBC 1st byte range 2 start */ |
#define _DF2E 0xFC /* DBC 1st byte range 2 end */ |
#define _DS1S 0x40 /* DBC 2nd byte range 1 start */ |
#define _DS1E 0x7E /* DBC 2nd byte range 1 end */ |
#define _DS2S 0x80 /* DBC 2nd byte range 2 start */ |
#define _DS2E 0xFC /* DBC 2nd byte range 2 end */ |
|
#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ |
#define _DF1S 0x81 |
#define _DF1E 0xFE |
#define _DS1S 0x40 |
#define _DS1E 0x7E |
#define _DS2S 0x80 |
#define _DS2E 0xFE |
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#elif _CODE_PAGE == 949 /* Korean */ |
#define _DF1S 0x81 |
#define _DF1E 0xFE |
#define _DS1S 0x41 |
#define _DS1E 0x5A |
#define _DS2S 0x61 |
#define _DS2E 0x7A |
#define _DS3S 0x81 |
#define _DS3E 0xFE |
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#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ |
#define _DF1S 0x81 |
#define _DF1E 0xFE |
#define _DS1S 0x40 |
#define _DS1E 0x7E |
#define _DS2S 0xA1 |
#define _DS2E 0xFE |
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#elif _CODE_PAGE == 437 /* U.S. (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ |
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
|
#elif _CODE_PAGE == 720 /* Arabic (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
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#elif _CODE_PAGE == 737 /* Greek (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ |
0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
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#elif _CODE_PAGE == 775 /* Baltic (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ |
0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
|
#elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ |
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
|
#elif _CODE_PAGE == 852 /* Latin 2 (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \ |
0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} |
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#elif _CODE_PAGE == 855 /* Cyrillic (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ |
0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ |
0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} |
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#elif _CODE_PAGE == 857 /* Turkish (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ |
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
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#elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ |
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
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#elif _CODE_PAGE == 862 /* Hebrew (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ |
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
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#elif _CODE_PAGE == 866 /* Russian (OEM) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ |
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
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#elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
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#elif _CODE_PAGE == 1250 /* Central Europe (Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \ |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF} |
|
#elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \ |
0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF} |
|
#elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \ |
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F} |
|
#elif _CODE_PAGE == 1253 /* Greek (Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \ |
0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF} |
|
#elif _CODE_PAGE == 1254 /* Turkish (Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \ |
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F} |
|
#elif _CODE_PAGE == 1255 /* Hebrew (Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ |
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} |
|
#elif _CODE_PAGE == 1256 /* Arabic (Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \ |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF} |
|
#elif _CODE_PAGE == 1257 /* Baltic (Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ |
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF} |
|
#elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */ |
#define _DF1S 0 |
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \ |
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ |
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F} |
|
#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ |
#if _USE_LFN |
#error Cannot use LFN feature without valid code page. |
#endif |
#define _DF1S 0 |
|
#else |
#error Unknown code page |
|
#endif |
|
|
/* Character code support macros */ |
#define IsUpper(c) (((c)>='A')&&((c)<='Z')) |
#define IsLower(c) (((c)>='a')&&((c)<='z')) |
#define IsDigit(c) (((c)>='0')&&((c)<='9')) |
|
#if _DF1S /* Code page is DBCS */ |
|
#ifdef _DF2S /* Two 1st byte areas */ |
#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) |
#else /* One 1st byte area */ |
#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) |
#endif |
|
#ifdef _DS3S /* Three 2nd byte areas */ |
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) |
#else /* Two 2nd byte areas */ |
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) |
#endif |
|
#else /* Code page is SBCS */ |
|
#define IsDBCS1(c) 0 |
#define IsDBCS2(c) 0 |
|
#endif /* _DF1S */ |
|
|
/* Name status flags */ |
#define NS 11 /* Index of name status byte in fn[] */ |
#define NS_LOSS 0x01 /* Out of 8.3 format */ |
#define NS_LFN 0x02 /* Force to create LFN entry */ |
#define NS_LAST 0x04 /* Last segment */ |
#define NS_BODY 0x08 /* Lower case flag (body) */ |
#define NS_EXT 0x10 /* Lower case flag (ext) */ |
#define NS_DOT 0x20 /* Dot entry */ |
|
|
/* FAT sub-type boundaries */ |
/* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */ |
#define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */ |
#define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */ |
|
|
/* FatFs refers the members in the FAT structures as byte array instead of |
/ structure member because the structure is not binary compatible between |
/ different platforms */ |
|
#define BS_jmpBoot 0 /* Jump instruction (3) */ |
#define BS_OEMName 3 /* OEM name (8) */ |
#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ |
#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ |
#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ |
#define BPB_NumFATs 16 /* Number of FAT copies (1) */ |
#define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */ |
#define BPB_TotSec16 19 /* Volume size [sector] (2) */ |
#define BPB_Media 21 /* Media descriptor (1) */ |
#define BPB_FATSz16 22 /* FAT size [sector] (2) */ |
#define BPB_SecPerTrk 24 /* Track size [sector] (2) */ |
#define BPB_NumHeads 26 /* Number of heads (2) */ |
#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ |
#define BPB_TotSec32 32 /* Volume size [sector] (4) */ |
#define BS_DrvNum 36 /* Physical drive number (2) */ |
#define BS_BootSig 38 /* Extended boot signature (1) */ |
#define BS_VolID 39 /* Volume serial number (4) */ |
#define BS_VolLab 43 /* Volume label (8) */ |
#define BS_FilSysType 54 /* File system type (1) */ |
#define BPB_FATSz32 36 /* FAT size [sector] (4) */ |
#define BPB_ExtFlags 40 /* Extended flags (2) */ |
#define BPB_FSVer 42 /* File system version (2) */ |
#define BPB_RootClus 44 /* Root dir first cluster (4) */ |
#define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */ |
#define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */ |
#define BS_DrvNum32 64 /* Physical drive number (2) */ |
#define BS_BootSig32 66 /* Extended boot signature (1) */ |
#define BS_VolID32 67 /* Volume serial number (4) */ |
#define BS_VolLab32 71 /* Volume label (8) */ |
#define BS_FilSysType32 82 /* File system type (1) */ |
#define FSI_LeadSig 0 /* FSI: Leading signature (4) */ |
#define FSI_StrucSig 484 /* FSI: Structure signature (4) */ |
#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ |
#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ |
#define MBR_Table 446 /* MBR: Partition table offset (2) */ |
#define SZ_PTE 16 /* MBR: Size of a partition table entry */ |
#define BS_55AA 510 /* Boot sector signature (2) */ |
|
#define DIR_Name 0 /* Short file name (11) */ |
#define DIR_Attr 11 /* Attribute (1) */ |
#define DIR_NTres 12 /* NT flag (1) */ |
#define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */ |
#define DIR_CrtTime 14 /* Created time (2) */ |
#define DIR_CrtDate 16 /* Created date (2) */ |
#define DIR_LstAccDate 18 /* Last accessed date (2) */ |
#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ |
#define DIR_WrtTime 22 /* Modified time (2) */ |
#define DIR_WrtDate 24 /* Modified date (2) */ |
#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ |
#define DIR_FileSize 28 /* File size (4) */ |
#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ |
#define LDIR_Attr 11 /* LFN attribute (1) */ |
#define LDIR_Type 12 /* LFN type (1) */ |
#define LDIR_Chksum 13 /* Sum of corresponding SFN entry */ |
#define LDIR_FstClusLO 26 /* Filled by zero (0) */ |
#define SZ_DIR 32 /* Size of a directory entry */ |
#define LLE 0x40 /* Last long entry flag in LDIR_Ord */ |
#define DDE 0xE5 /* Deleted directory entry mark in DIR_Name[0] */ |
#define NDDE 0x05 /* Replacement of the character collides with DDE */ |
|
|
/*------------------------------------------------------------*/ |
/* Module private work area */ |
/*------------------------------------------------------------*/ |
/* Note that uninitialized variables with static duration are |
/ zeroed/nulled at start-up. If not, the compiler or start-up |
/ routine is out of ANSI-C standard. |
*/ |
|
#if _VOLUMES |
static |
FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ |
#else |
#error Number of volumes must not be 0. |
#endif |
|
static |
WORD Fsid; /* File system mount ID */ |
|
#if _FS_RPATH |
static |
BYTE CurrVol; /* Current drive */ |
#endif |
|
#if _FS_LOCK |
static |
FILESEM Files[_FS_LOCK]; /* File lock semaphores */ |
#endif |
|
#if _USE_LFN == 0 /* No LFN feature */ |
#define DEF_NAMEBUF BYTE sfn[12] |
#define INIT_BUF(dobj) (dobj).fn = sfn |
#define FREE_BUF() |
|
#elif _USE_LFN == 1 /* LFN feature with static working buffer */ |
static WCHAR LfnBuf[_MAX_LFN+1]; |
#define DEF_NAMEBUF BYTE sfn[12] |
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } |
#define FREE_BUF() |
|
#elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */ |
#define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1] |
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; } |
#define FREE_BUF() |
|
#elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */ |
#define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn |
#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \ |
if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \ |
(dobj).lfn = lfn; (dobj).fn = sfn; } |
#define FREE_BUF() ff_memfree(lfn) |
|
#else |
#error Wrong LFN configuration. |
#endif |
|
|
|
|
/*-------------------------------------------------------------------------- |
|
Module Private Functions |
|
---------------------------------------------------------------------------*/ |
|
|
/*-----------------------------------------------------------------------*/ |
/* String functions */ |
/*-----------------------------------------------------------------------*/ |
|
/* Copy memory to memory */ |
static |
void mem_cpy (void* dst, const void* src, UINT cnt) { |
BYTE *d = (BYTE*)dst; |
const BYTE *s = (const BYTE*)src; |
|
#if _WORD_ACCESS == 1 |
while (cnt >= sizeof (int)) { |
*(int*)d = *(int*)s; |
d += sizeof (int); s += sizeof (int); |
cnt -= sizeof (int); |
} |
#endif |
while (cnt--) |
*d++ = *s++; |
} |
|
/* Fill memory */ |
static |
void mem_set (void* dst, int val, UINT cnt) { |
BYTE *d = (BYTE*)dst; |
|
while (cnt--) |
*d++ = (BYTE)val; |
} |
|
/* Compare memory to memory */ |
static |
int mem_cmp (const void* dst, const void* src, UINT cnt) { |
const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; |
int r = 0; |
|
while (cnt-- && (r = *d++ - *s++) == 0) ; |
return r; |
} |
|
/* Check if chr is contained in the string */ |
static |
int chk_chr (const char* str, int chr) { |
while (*str && *str != chr) str++; |
return *str; |
} |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Request/Release grant to access the volume */ |
/*-----------------------------------------------------------------------*/ |
#if _FS_REENTRANT |
|
static |
int lock_fs ( |
FATFS *fs /* File system object */ |
) |
{ |
return ff_req_grant(fs->sobj); |
} |
|
|
static |
void unlock_fs ( |
FATFS *fs, /* File system object */ |
FRESULT res /* Result code to be returned */ |
) |
{ |
if (fs && |
res != FR_NOT_ENABLED && |
res != FR_INVALID_DRIVE && |
res != FR_INVALID_OBJECT && |
res != FR_TIMEOUT) { |
ff_rel_grant(fs->sobj); |
} |
} |
#endif |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* File lock control functions */ |
/*-----------------------------------------------------------------------*/ |
#if _FS_LOCK |
|
static |
FRESULT chk_lock ( /* Check if the file can be accessed */ |
DIR* dj, /* Directory object pointing the file to be checked */ |
int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ |
) |
{ |
UINT i, be; |
|
/* Search file semaphore table */ |
for (i = be = 0; i < _FS_LOCK; i++) { |
if (Files[i].fs) { /* Existing entry */ |
if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */ |
Files[i].clu == dj->sclust && |
Files[i].idx == dj->index) break; |
} else { /* Blank entry */ |
be++; |
} |
} |
if (i == _FS_LOCK) /* The file is not opened */ |
return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */ |
|
/* The file has been opened. Reject any open against writing file and all write mode open */ |
return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; |
} |
|
|
static |
int enq_lock (void) /* Check if an entry is available for a new file */ |
{ |
UINT i; |
|
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; |
return (i == _FS_LOCK) ? 0 : 1; |
} |
|
|
static |
UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */ |
DIR* dj, /* Directory object pointing the file to register or increment */ |
int acc /* Desired access mode (0:Read, !0:Write) */ |
) |
{ |
UINT i; |
|
|
for (i = 0; i < _FS_LOCK; i++) { /* Find the file */ |
if (Files[i].fs == dj->fs && |
Files[i].clu == dj->sclust && |
Files[i].idx == dj->index) break; |
} |
|
if (i == _FS_LOCK) { /* Not opened. Register it as new. */ |
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; |
if (i == _FS_LOCK) return 0; /* No space to register (int err) */ |
Files[i].fs = dj->fs; |
Files[i].clu = dj->sclust; |
Files[i].idx = dj->index; |
Files[i].ctr = 0; |
} |
|
if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ |
|
Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ |
|
return i + 1; |
} |
|
|
static |
FRESULT dec_lock ( /* Decrement file open counter */ |
UINT i /* Semaphore index */ |
) |
{ |
WORD n; |
FRESULT res; |
|
|
if (--i < _FS_LOCK) { |
n = Files[i].ctr; |
if (n == 0x100) n = 0; |
if (n) n--; |
Files[i].ctr = n; |
if (!n) Files[i].fs = 0; |
res = FR_OK; |
} else { |
res = FR_INT_ERR; |
} |
return res; |
} |
|
|
static |
void clear_lock ( /* Clear lock entries of the volume */ |
FATFS *fs |
) |
{ |
UINT i; |
|
for (i = 0; i < _FS_LOCK; i++) { |
if (Files[i].fs == fs) Files[i].fs = 0; |
} |
} |
#endif |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Change window offset */ |
/*-----------------------------------------------------------------------*/ |
|
static |
FRESULT move_window ( |
FATFS *fs, /* File system object */ |
DWORD sector /* Sector number to make appearance in the fs->win[] */ |
) /* Move to zero only writes back dirty window */ |
{ |
DWORD wsect; |
|
|
wsect = fs->winsect; |
if (wsect != sector) { /* Changed current window */ |
#if !_FS_READONLY |
if (fs->wflag) { /* Write back dirty window if needed */ |
if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) |
return FR_DISK_ERR; |
fs->wflag = 0; |
if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */ |
BYTE nf; |
for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */ |
wsect += fs->fsize; |
disk_write(fs->drv, fs->win, wsect, 1); |
} |
} |
} |
#endif |
if (sector) { |
if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) |
return FR_DISK_ERR; |
fs->winsect = sector; |
} |
} |
|
return FR_OK; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Clean-up cached data */ |
/*-----------------------------------------------------------------------*/ |
#if !_FS_READONLY |
static |
FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */ |
FATFS *fs /* File system object */ |
) |
{ |
FRESULT res; |
|
|
res = move_window(fs, 0); |
if (res == FR_OK) { |
/* Update FSInfo sector if needed */ |
if (fs->fs_type == FS_FAT32 && fs->fsi_flag) { |
fs->winsect = 0; |
/* Create FSInfo structure */ |
mem_set(fs->win, 0, 512); |
ST_WORD(fs->win+BS_55AA, 0xAA55); |
ST_DWORD(fs->win+FSI_LeadSig, 0x41615252); |
ST_DWORD(fs->win+FSI_StrucSig, 0x61417272); |
ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust); |
ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust); |
/* Write it into the FSInfo sector */ |
disk_write(fs->drv, fs->win, fs->fsi_sector, 1); |
fs->fsi_flag = 0; |
} |
/* Make sure that no pending write process in the physical drive */ |
if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) |
res = FR_DISK_ERR; |
} |
|
return res; |
} |
#endif |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Get sector# from cluster# */ |
/*-----------------------------------------------------------------------*/ |
|
|
DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ |
FATFS *fs, /* File system object */ |
DWORD clst /* Cluster# to be converted */ |
) |
{ |
clst -= 2; |
if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ |
return clst * fs->csize + fs->database; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* FAT access - Read value of a FAT entry */ |
/*-----------------------------------------------------------------------*/ |
|
|
DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */ |
FATFS *fs, /* File system object */ |
DWORD clst /* Cluster# to get the link information */ |
) |
{ |
UINT wc, bc; |
BYTE *p; |
|
|
if (clst < 2 || clst >= fs->n_fatent) /* Check range */ |
return 1; |
|
switch (fs->fs_type) { |
case FS_FAT12 : |
bc = (UINT)clst; bc += bc / 2; |
if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; |
wc = fs->win[bc % SS(fs)]; bc++; |
if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; |
wc |= fs->win[bc % SS(fs)] << 8; |
return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); |
|
case FS_FAT16 : |
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break; |
p = &fs->win[clst * 2 % SS(fs)]; |
return LD_WORD(p); |
|
case FS_FAT32 : |
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break; |
p = &fs->win[clst * 4 % SS(fs)]; |
return LD_DWORD(p) & 0x0FFFFFFF; |
} |
|
return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */ |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* FAT access - Change value of a FAT entry */ |
/*-----------------------------------------------------------------------*/ |
#if !_FS_READONLY |
|
FRESULT put_fat ( |
FATFS *fs, /* File system object */ |
DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */ |
DWORD val /* New value to mark the cluster */ |
) |
{ |
UINT bc; |
BYTE *p; |
FRESULT res; |
|
|
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ |
res = FR_INT_ERR; |
|
} else { |
switch (fs->fs_type) { |
case FS_FAT12 : |
bc = (UINT)clst; bc += bc / 2; |
res = move_window(fs, fs->fatbase + (bc / SS(fs))); |
if (res != FR_OK) break; |
p = &fs->win[bc % SS(fs)]; |
*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; |
bc++; |
fs->wflag = 1; |
res = move_window(fs, fs->fatbase + (bc / SS(fs))); |
if (res != FR_OK) break; |
p = &fs->win[bc % SS(fs)]; |
*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); |
break; |
|
case FS_FAT16 : |
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); |
if (res != FR_OK) break; |
p = &fs->win[clst * 2 % SS(fs)]; |
ST_WORD(p, (WORD)val); |
break; |
|
case FS_FAT32 : |
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); |
if (res != FR_OK) break; |
p = &fs->win[clst * 4 % SS(fs)]; |
val |= LD_DWORD(p) & 0xF0000000; |
ST_DWORD(p, val); |
break; |
|
default : |
res = FR_INT_ERR; |
} |
fs->wflag = 1; |
} |
|
return res; |
} |
#endif /* !_FS_READONLY */ |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* FAT handling - Remove a cluster chain */ |
/*-----------------------------------------------------------------------*/ |
#if !_FS_READONLY |
static |
FRESULT remove_chain ( |
FATFS *fs, /* File system object */ |
DWORD clst /* Cluster# to remove a chain from */ |
) |
{ |
FRESULT res; |
DWORD nxt; |
#if _USE_ERASE |
DWORD scl = clst, ecl = clst, rt[2]; |
#endif |
|
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ |
res = FR_INT_ERR; |
|
} else { |
res = FR_OK; |
while (clst < fs->n_fatent) { /* Not a last link? */ |
nxt = get_fat(fs, clst); /* Get cluster status */ |
if (nxt == 0) break; /* Empty cluster? */ |
if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ |
if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ |
res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ |
if (res != FR_OK) break; |
if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */ |
fs->free_clust++; |
fs->fsi_flag = 1; |
} |
#if _USE_ERASE |
if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ |
ecl = nxt; |
} else { /* End of contiguous clusters */ |
rt[0] = clust2sect(fs, scl); /* Start sector */ |
rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ |
disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt); /* Erase the block */ |
scl = ecl = nxt; |
} |
#endif |
clst = nxt; /* Next cluster */ |
} |
} |
|
return res; |
} |
#endif |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* FAT handling - Stretch or Create a cluster chain */ |
/*-----------------------------------------------------------------------*/ |
#if !_FS_READONLY |
static |
DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ |
FATFS *fs, /* File system object */ |
DWORD clst /* Cluster# to stretch. 0 means create a new chain. */ |
) |
{ |
DWORD cs, ncl, scl; |
FRESULT res; |
|
|
if (clst == 0) { /* Create a new chain */ |
scl = fs->last_clust; /* Get suggested start point */ |
if (!scl || scl >= fs->n_fatent) scl = 1; |
} |
else { /* Stretch the current chain */ |
cs = get_fat(fs, clst); /* Check the cluster status */ |
if (cs < 2) return 1; /* It is an invalid cluster */ |
if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ |
scl = clst; |
} |
|
ncl = scl; /* Start cluster */ |
for (;;) { |
ncl++; /* Next cluster */ |
if (ncl >= fs->n_fatent) { /* Wrap around */ |
ncl = 2; |
if (ncl > scl) return 0; /* No free cluster */ |
} |
cs = get_fat(fs, ncl); /* Get the cluster status */ |
if (cs == 0) break; /* Found a free cluster */ |
if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ |
return cs; |
if (ncl == scl) return 0; /* No free cluster */ |
} |
|
res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ |
if (res == FR_OK && clst != 0) { |
res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ |
} |
if (res == FR_OK) { |
fs->last_clust = ncl; /* Update FSINFO */ |
if (fs->free_clust != 0xFFFFFFFF) { |
fs->free_clust--; |
fs->fsi_flag = 1; |
} |
} else { |
ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; |
} |
|
return ncl; /* Return new cluster number or error code */ |
} |
#endif /* !_FS_READONLY */ |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* FAT handling - Convert offset into cluster with link map table */ |
/*-----------------------------------------------------------------------*/ |
|
#if _USE_FASTSEEK |
static |
DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ |
FIL* fp, /* Pointer to the file object */ |
DWORD ofs /* File offset to be converted to cluster# */ |
) |
{ |
DWORD cl, ncl, *tbl; |
|
|
tbl = fp->cltbl + 1; /* Top of CLMT */ |
cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ |
for (;;) { |
ncl = *tbl++; /* Number of cluters in the fragment */ |
if (!ncl) return 0; /* End of table? (error) */ |
if (cl < ncl) break; /* In this fragment? */ |
cl -= ncl; tbl++; /* Next fragment */ |
} |
return cl + *tbl; /* Return the cluster number */ |
} |
#endif /* _USE_FASTSEEK */ |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Directory handling - Set directory index */ |
/*-----------------------------------------------------------------------*/ |
|
static |
FRESULT dir_sdi ( |
DIR *dj, /* Pointer to directory object */ |
WORD idx /* Index of directory table */ |
) |
{ |
DWORD clst; |
WORD ic; |
|
|
dj->index = idx; |
clst = dj->sclust; |
if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */ |
return FR_INT_ERR; |
if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ |
clst = dj->fs->dirbase; |
|
if (clst == 0) { /* Static table (root-dir in FAT12/16) */ |
dj->clust = clst; |
if (idx >= dj->fs->n_rootdir) /* Index is out of range */ |
return FR_INT_ERR; |
dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ |
} |
else { /* Dynamic table (sub-dirs or root-dir in FAT32) */ |
ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */ |
while (idx >= ic) { /* Follow cluster chain */ |
clst = get_fat(dj->fs, clst); /* Get next cluster */ |
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ |
if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */ |
return FR_INT_ERR; |
idx -= ic; |
} |
dj->clust = clst; |
dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ |
} |
|
dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */ |
|
return FR_OK; /* Seek succeeded */ |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Directory handling - Move directory table index next */ |
/*-----------------------------------------------------------------------*/ |
|
static |
FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */ |
DIR *dj, /* Pointer to directory object */ |
int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ |
) |
{ |
DWORD clst; |
WORD i; |
|
|
stretch = stretch; /* To suppress warning on read-only cfg. */ |
i = dj->index + 1; |
if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ |
return FR_NO_FILE; |
|
if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */ |
dj->sect++; /* Next sector */ |
|
if (dj->clust == 0) { /* Static table */ |
if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */ |
return FR_NO_FILE; |
} |
else { /* Dynamic table */ |
if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */ |
clst = get_fat(dj->fs, dj->clust); /* Get next cluster */ |
if (clst <= 1) return FR_INT_ERR; |
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; |
if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */ |
#if !_FS_READONLY |
BYTE c; |
if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */ |
clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */ |
if (clst == 0) return FR_DENIED; /* No free cluster */ |
if (clst == 1) return FR_INT_ERR; |
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; |
/* Clean-up stretched table */ |
if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */ |
mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */ |
dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */ |
for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */ |
dj->fs->wflag = 1; |
if (move_window(dj->fs, 0)) return FR_DISK_ERR; |
dj->fs->winsect++; |
} |
dj->fs->winsect -= c; /* Rewind window address */ |
#else |
return FR_NO_FILE; /* Report EOT */ |
#endif |
} |
dj->clust = clst; /* Initialize data for new cluster */ |
dj->sect = clust2sect(dj->fs, clst); |
} |
} |
} |
|
dj->index = i; |
dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; |
|
return FR_OK; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Directory handling - Load/Store start cluster number */ |
/*-----------------------------------------------------------------------*/ |
|
static |
DWORD ld_clust ( |
FATFS *fs, /* Pointer to the fs object */ |
BYTE *dir /* Pointer to the directory entry */ |
) |
{ |
DWORD cl; |
|
cl = LD_WORD(dir+DIR_FstClusLO); |
if (fs->fs_type == FS_FAT32) |
cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16; |
|
return cl; |
} |
|
|
#if !_FS_READONLY |
static |
void st_clust ( |
BYTE *dir, /* Pointer to the directory entry */ |
DWORD cl /* Value to be set */ |
) |
{ |
ST_WORD(dir+DIR_FstClusLO, cl); |
ST_WORD(dir+DIR_FstClusHI, cl >> 16); |
} |
#endif |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ |
/*-----------------------------------------------------------------------*/ |
#if _USE_LFN |
static |
const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */ |
|
|
static |
int cmp_lfn ( /* 1:Matched, 0:Not matched */ |
WCHAR *lfnbuf, /* Pointer to the LFN to be compared */ |
BYTE *dir /* Pointer to the directory entry containing a part of LFN */ |
) |
{ |
UINT i, s; |
WCHAR wc, uc; |
|
|
i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */ |
s = 0; wc = 1; |
do { |
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ |
if (wc) { /* Last char has not been processed */ |
wc = ff_wtoupper(uc); /* Convert it to upper case */ |
if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */ |
return 0; /* Not matched */ |
} else { |
if (uc != 0xFFFF) return 0; /* Check filler */ |
} |
} while (++s < 13); /* Repeat until all chars in the entry are checked */ |
|
if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */ |
return 0; |
|
return 1; /* The part of LFN matched */ |
} |
|
|
|
static |
int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */ |
WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */ |
BYTE *dir /* Pointer to the directory entry */ |
) |
{ |
UINT i, s; |
WCHAR wc, uc; |
|
|
i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ |
|
s = 0; wc = 1; |
do { |
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ |
if (wc) { /* Last char has not been processed */ |
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ |
lfnbuf[i++] = wc = uc; /* Store it */ |
} else { |
if (uc != 0xFFFF) return 0; /* Check filler */ |
} |
} while (++s < 13); /* Read all character in the entry */ |
|
if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */ |
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ |
lfnbuf[i] = 0; |
} |
|
return 1; |
} |
|
|
#if !_FS_READONLY |
static |
void fit_lfn ( |
const WCHAR *lfnbuf, /* Pointer to the LFN buffer */ |
BYTE *dir, /* Pointer to the directory entry */ |
BYTE ord, /* LFN order (1-20) */ |
BYTE sum /* SFN sum */ |
) |
{ |
UINT i, s; |
WCHAR wc; |
|
|
dir[LDIR_Chksum] = sum; /* Set check sum */ |
dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ |
dir[LDIR_Type] = 0; |
ST_WORD(dir+LDIR_FstClusLO, 0); |
|
i = (ord - 1) * 13; /* Get offset in the LFN buffer */ |
s = wc = 0; |
do { |
if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */ |
ST_WORD(dir+LfnOfs[s], wc); /* Put it */ |
if (!wc) wc = 0xFFFF; /* Padding chars following last char */ |
} while (++s < 13); |
if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */ |
dir[LDIR_Ord] = ord; /* Set the LFN order */ |
} |
|
#endif |
#endif |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Create numbered name */ |
/*-----------------------------------------------------------------------*/ |
#if _USE_LFN |
void gen_numname ( |
BYTE *dst, /* Pointer to generated SFN */ |
const BYTE *src, /* Pointer to source SFN to be modified */ |
const WCHAR *lfn, /* Pointer to LFN */ |
WORD seq /* Sequence number */ |
) |
{ |
BYTE ns[8], c; |
UINT i, j; |
|
|
mem_cpy(dst, src, 11); |
|
if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ |
do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn); |
} |
|
/* itoa (hexdecimal) */ |
i = 7; |
do { |
c = (seq % 16) + '0'; |
if (c > '9') c += 7; |
ns[i--] = c; |
seq /= 16; |
} while (seq); |
ns[i] = '~'; |
|
/* Append the number */ |
for (j = 0; j < i && dst[j] != ' '; j++) { |
if (IsDBCS1(dst[j])) { |
if (j == i - 1) break; |
j++; |
} |
} |
do { |
dst[j++] = (i < 8) ? ns[i++] : ' '; |
} while (j < 8); |
} |
#endif |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Calculate sum of an SFN */ |
/*-----------------------------------------------------------------------*/ |
#if _USE_LFN |
static |
BYTE sum_sfn ( |
const BYTE *dir /* Ptr to directory entry */ |
) |
{ |
BYTE sum = 0; |
UINT n = 11; |
|
do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); |
return sum; |
} |
#endif |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Directory handling - Find an object in the directory */ |
/*-----------------------------------------------------------------------*/ |
|
static |
FRESULT dir_find ( |
DIR *dj /* Pointer to the directory object linked to the file name */ |
) |
{ |
FRESULT res; |
BYTE c, *dir; |
#if _USE_LFN |
BYTE a, ord, sum; |
#endif |
|
res = dir_sdi(dj, 0); /* Rewind directory object */ |
if (res != FR_OK) return res; |
|
#if _USE_LFN |
ord = sum = 0xFF; |
#endif |
do { |
res = move_window(dj->fs, dj->sect); |
if (res != FR_OK) break; |
dir = dj->dir; /* Ptr to the directory entry of current index */ |
c = dir[DIR_Name]; |
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ |
#if _USE_LFN /* LFN configuration */ |
a = dir[DIR_Attr] & AM_MASK; |
if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ |
ord = 0xFF; |
} else { |
if (a == AM_LFN) { /* An LFN entry is found */ |
if (dj->lfn) { |
if (c & LLE) { /* Is it start of LFN sequence? */ |
sum = dir[LDIR_Chksum]; |
c &= ~LLE; ord = c; /* LFN start order */ |
dj->lfn_idx = dj->index; |
} |
/* Check validity of the LFN entry and compare it with given name */ |
ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; |
} |
} else { /* An SFN entry is found */ |
if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ |
ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */ |
if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */ |
} |
} |
#else /* Non LFN configuration */ |
if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ |
break; |
#endif |
res = dir_next(dj, 0); /* Next entry */ |
} while (res == FR_OK); |
|
return res; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Read an object from the directory */ |
/*-----------------------------------------------------------------------*/ |
#if _FS_MINIMIZE <= 1 |
static |
FRESULT dir_read ( |
DIR *dj /* Pointer to the directory object that pointing the entry to be read */ |
) |
{ |
FRESULT res; |
BYTE c, *dir; |
#if _USE_LFN |
BYTE a, ord = 0xFF, sum = 0xFF; |
#endif |
|
res = FR_NO_FILE; |
while (dj->sect) { |
res = move_window(dj->fs, dj->sect); |
if (res != FR_OK) break; |
dir = dj->dir; /* Ptr to the directory entry of current index */ |
c = dir[DIR_Name]; |
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ |
#if _USE_LFN /* LFN configuration */ |
a = dir[DIR_Attr] & AM_MASK; |
if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ |
ord = 0xFF; |
} else { |
if (a == AM_LFN) { /* An LFN entry is found */ |
if (c & LLE) { /* Is it start of LFN sequence? */ |
sum = dir[LDIR_Chksum]; |
c &= ~LLE; ord = c; |
dj->lfn_idx = dj->index; |
} |
/* Check LFN validity and capture it */ |
ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; |
} else { /* An SFN entry is found */ |
if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ |
dj->lfn_idx = 0xFFFF; /* It has no LFN. */ |
break; |
} |
} |
#else /* Non LFN configuration */ |
if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */ |
break; |
#endif |
res = dir_next(dj, 0); /* Next entry */ |
if (res != FR_OK) break; |
} |
|
if (res != FR_OK) dj->sect = 0; |
|
return res; |
} |
#endif |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Register an object to the directory */ |
/*-----------------------------------------------------------------------*/ |
#if !_FS_READONLY |
static |
FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */ |
DIR *dj /* Target directory with object name to be created */ |
) |
{ |
FRESULT res; |
BYTE c, *dir; |
#if _USE_LFN /* LFN configuration */ |
WORD n, ne, is; |
BYTE sn[12], *fn, sum; |
WCHAR *lfn; |
|
|
fn = dj->fn; lfn = dj->lfn; |
mem_cpy(sn, fn, 12); |
|
if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */ |
return FR_INVALID_NAME; |
|
if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ |
fn[NS] = 0; dj->lfn = 0; /* Find only SFN */ |
for (n = 1; n < 100; n++) { |
gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ |
res = dir_find(dj); /* Check if the name collides with existing SFN */ |
if (res != FR_OK) break; |
} |
if (n == 100) return FR_DENIED; /* Abort if too many collisions */ |
if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ |
fn[NS] = sn[NS]; dj->lfn = lfn; |
} |
|
if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */ |
for (ne = 0; lfn[ne]; ne++) ; |
ne = (ne + 25) / 13; |
} else { /* Otherwise reserve only an SFN entry. */ |
ne = 1; |
} |
|
/* Reserve contiguous entries */ |
res = dir_sdi(dj, 0); |
if (res != FR_OK) return res; |
n = is = 0; |
do { |
res = move_window(dj->fs, dj->sect); |
if (res != FR_OK) break; |
c = *dj->dir; /* Check the entry status */ |
if (c == DDE || c == 0) { /* Is it a blank entry? */ |
if (n == 0) is = dj->index; /* First index of the contiguous entry */ |
if (++n == ne) break; /* A contiguous entry that required count is found */ |
} else { |
n = 0; /* Not a blank entry. Restart to search */ |
} |
res = dir_next(dj, 1); /* Next entry with table stretch */ |
} while (res == FR_OK); |
|
if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */ |
res = dir_sdi(dj, is); |
if (res == FR_OK) { |
sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */ |
ne--; |
do { /* Store LFN entries in bottom first */ |
res = move_window(dj->fs, dj->sect); |
if (res != FR_OK) break; |
fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum); |
dj->fs->wflag = 1; |
res = dir_next(dj, 0); /* Next entry */ |
} while (res == FR_OK && --ne); |
} |
} |
|
#else /* Non LFN configuration */ |
res = dir_sdi(dj, 0); |
if (res == FR_OK) { |
do { /* Find a blank entry for the SFN */ |
res = move_window(dj->fs, dj->sect); |
if (res != FR_OK) break; |
c = *dj->dir; |
if (c == DDE || c == 0) break; /* Is it a blank entry? */ |
res = dir_next(dj, 1); /* Next entry with table stretch */ |
} while (res == FR_OK); |
} |
#endif |
|
if (res == FR_OK) { /* Initialize the SFN entry */ |
res = move_window(dj->fs, dj->sect); |
if (res == FR_OK) { |
dir = dj->dir; |
mem_set(dir, 0, SZ_DIR); /* Clean the entry */ |
mem_cpy(dir, dj->fn, 11); /* Put SFN */ |
#if _USE_LFN |
dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */ |
#endif |
dj->fs->wflag = 1; |
} |
} |
|
return res; |
} |
#endif /* !_FS_READONLY */ |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Remove an object from the directory */ |
/*-----------------------------------------------------------------------*/ |
#if !_FS_READONLY && !_FS_MINIMIZE |
static |
FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */ |
DIR *dj /* Directory object pointing the entry to be removed */ |
) |
{ |
FRESULT res; |
#if _USE_LFN /* LFN configuration */ |
WORD i; |
|
i = dj->index; /* SFN index */ |
res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */ |
if (res == FR_OK) { |
do { |
res = move_window(dj->fs, dj->sect); |
if (res != FR_OK) break; |
*dj->dir = DDE; /* Mark the entry "deleted" */ |
dj->fs->wflag = 1; |
if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ |
res = dir_next(dj, 0); /* Next entry */ |
} while (res == FR_OK); |
if (res == FR_NO_FILE) res = FR_INT_ERR; |
} |
|
#else /* Non LFN configuration */ |
res = dir_sdi(dj, dj->index); |
if (res == FR_OK) { |
res = move_window(dj->fs, dj->sect); |
if (res == FR_OK) { |
*dj->dir = DDE; /* Mark the entry "deleted" */ |
dj->fs->wflag = 1; |
} |
} |
#endif |
|
return res; |
} |
#endif /* !_FS_READONLY */ |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Pick a segment and create the object name in directory form */ |
/*-----------------------------------------------------------------------*/ |
|
static |
FRESULT create_name ( |
DIR *dj, /* Pointer to the directory object */ |
const TCHAR **path /* Pointer to pointer to the segment in the path string */ |
) |
{ |
#ifdef _EXCVT |
static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */ |
#endif |
|
#if _USE_LFN /* LFN configuration */ |
BYTE b, cf; |
WCHAR w, *lfn; |
UINT i, ni, si, di; |
const TCHAR *p; |
|
/* Create LFN in Unicode */ |
for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ |
lfn = dj->lfn; |
si = di = 0; |
for (;;) { |
w = p[si++]; /* Get a character */ |
if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ |
if (di >= _MAX_LFN) /* Reject too long name */ |
return FR_INVALID_NAME; |
#if !_LFN_UNICODE |
w &= 0xFF; |
if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ |
b = (BYTE)p[si++]; /* Get 2nd byte */ |
if (!IsDBCS2(b)) |
return FR_INVALID_NAME; /* Reject invalid sequence */ |
w = (w << 8) + b; /* Create a DBC */ |
} |
w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ |
if (!w) return FR_INVALID_NAME; /* Reject invalid code */ |
#endif |
if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */ |
return FR_INVALID_NAME; |
lfn[di++] = w; /* Store the Unicode char */ |
} |
*path = &p[si]; /* Return pointer to the next segment */ |
cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ |
#if _FS_RPATH |
if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */ |
(di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) { |
lfn[di] = 0; |
for (i = 0; i < 11; i++) |
dj->fn[i] = (i < di) ? '.' : ' '; |
dj->fn[i] = cf | NS_DOT; /* This is a dot entry */ |
return FR_OK; |
} |
#endif |
while (di) { /* Strip trailing spaces and dots */ |
w = lfn[di-1]; |
if (w != ' ' && w != '.') break; |
di--; |
} |
if (!di) return FR_INVALID_NAME; /* Reject nul string */ |
|
lfn[di] = 0; /* LFN is created */ |
|
/* Create SFN in directory form */ |
mem_set(dj->fn, ' ', 11); |
for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ |
if (si) cf |= NS_LOSS | NS_LFN; |
while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ |
|
b = i = 0; ni = 8; |
for (;;) { |
w = lfn[si++]; /* Get an LFN char */ |
if (!w) break; /* Break on end of the LFN */ |
if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ |
cf |= NS_LOSS | NS_LFN; continue; |
} |
|
if (i >= ni || si == di) { /* Extension or end of SFN */ |
if (ni == 11) { /* Long extension */ |
cf |= NS_LOSS | NS_LFN; break; |
} |
if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ |
if (si > di) break; /* No extension */ |
si = di; i = 8; ni = 11; /* Enter extension section */ |
b <<= 2; continue; |
} |
|
if (w >= 0x80) { /* Non ASCII char */ |
#ifdef _EXCVT |
w = ff_convert(w, 0); /* Unicode -> OEM code */ |
if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */ |
#else |
w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ |
#endif |
cf |= NS_LFN; /* Force create LFN entry */ |
} |
|
if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */ |
if (i >= ni - 1) { |
cf |= NS_LOSS | NS_LFN; i = ni; continue; |
} |
dj->fn[i++] = (BYTE)(w >> 8); |
} else { /* Single byte char */ |
if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */ |
w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ |
} else { |
if (IsUpper(w)) { /* ASCII large capital */ |
b |= 2; |
} else { |
if (IsLower(w)) { /* ASCII small capital */ |
b |= 1; w -= 0x20; |
} |
} |
} |
} |
dj->fn[i++] = (BYTE)w; |
} |
|
if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */ |
|
if (ni == 8) b <<= 2; |
if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ |
cf |= NS_LFN; |
if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */ |
if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ |
if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ |
} |
|
dj->fn[NS] = cf; /* SFN is created */ |
|
return FR_OK; |
|
|
#else /* Non-LFN configuration */ |
BYTE b, c, d, *sfn; |
UINT ni, si, i; |
const char *p; |
|
/* Create file name in directory form */ |
for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ |
sfn = dj->fn; |
mem_set(sfn, ' ', 11); |
si = i = b = 0; ni = 8; |
#if _FS_RPATH |
if (p[si] == '.') { /* Is this a dot entry? */ |
for (;;) { |
c = (BYTE)p[si++]; |
if (c != '.' || si >= 3) break; |
sfn[i++] = c; |
} |
if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; |
*path = &p[si]; /* Return pointer to the next segment */ |
sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ |
return FR_OK; |
} |
#endif |
for (;;) { |
c = (BYTE)p[si++]; |
if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ |
if (c == '.' || i >= ni) { |
if (ni != 8 || c != '.') return FR_INVALID_NAME; |
i = 8; ni = 11; |
b <<= 2; continue; |
} |
if (c >= 0x80) { /* Extended char? */ |
b |= 3; /* Eliminate NT flag */ |
#ifdef _EXCVT |
c = excvt[c - 0x80]; /* Upper conversion (SBCS) */ |
#else |
#if !_DF1S /* ASCII only cfg */ |
return FR_INVALID_NAME; |
#endif |
#endif |
} |
if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ |
d = (BYTE)p[si++]; /* Get 2nd byte */ |
if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ |
return FR_INVALID_NAME; |
sfn[i++] = c; |
sfn[i++] = d; |
} else { /* Single byte code */ |
if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ |
return FR_INVALID_NAME; |
if (IsUpper(c)) { /* ASCII large capital? */ |
b |= 2; |
} else { |
if (IsLower(c)) { /* ASCII small capital? */ |
b |= 1; c -= 0x20; |
} |
} |
sfn[i++] = c; |
} |
} |
*path = &p[si]; /* Return pointer to the next segment */ |
c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ |
|
if (!i) return FR_INVALID_NAME; /* Reject nul string */ |
if (sfn[0] == DDE) sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */ |
|
if (ni == 8) b <<= 2; |
if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ |
if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ |
|
sfn[NS] = c; /* Store NT flag, File name is created */ |
|
return FR_OK; |
#endif |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Get file information from directory entry */ |
/*-----------------------------------------------------------------------*/ |
#if _FS_MINIMIZE <= 1 |
static |
void get_fileinfo ( /* No return code */ |
DIR *dj, /* Pointer to the directory object */ |
FILINFO *fno /* Pointer to the file information to be filled */ |
) |
{ |
UINT i; |
BYTE nt, *dir; |
TCHAR *p, c; |
|
|
p = fno->fname; |
if (dj->sect) { |
dir = dj->dir; |
nt = dir[DIR_NTres]; /* NT flag */ |
for (i = 0; i < 8; i++) { /* Copy name body */ |
c = dir[i]; |
if (c == ' ') break; |
if (c == NDDE) c = (TCHAR)DDE; |
if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20; |
#if _LFN_UNICODE |
if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1])) |
c = (c << 8) | dir[++i]; |
c = ff_convert(c, 1); |
if (!c) c = '?'; |
#endif |
*p++ = c; |
} |
if (dir[8] != ' ') { /* Copy name extension */ |
*p++ = '.'; |
for (i = 8; i < 11; i++) { |
c = dir[i]; |
if (c == ' ') break; |
if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20; |
#if _LFN_UNICODE |
if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1])) |
c = (c << 8) | dir[++i]; |
c = ff_convert(c, 1); |
if (!c) c = '?'; |
#endif |
*p++ = c; |
} |
} |
fno->fattrib = dir[DIR_Attr]; /* Attribute */ |
fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ |
fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ |
fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ |
} |
*p = 0; /* Terminate SFN str by a \0 */ |
|
#if _USE_LFN |
if (fno->lfname && fno->lfsize) { |
TCHAR *tp = fno->lfname; |
WCHAR w, *lfn; |
|
i = 0; |
if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */ |
lfn = dj->lfn; |
while ((w = *lfn++) != 0) { /* Get an LFN char */ |
#if !_LFN_UNICODE |
w = ff_convert(w, 0); /* Unicode -> OEM conversion */ |
if (!w) { i = 0; break; } /* Could not convert, no LFN */ |
if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ |
tp[i++] = (TCHAR)(w >> 8); |
#endif |
if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */ |
tp[i++] = (TCHAR)w; |
} |
} |
tp[i] = 0; /* Terminate the LFN str by a \0 */ |
} |
#endif |
} |
#endif /* _FS_MINIMIZE <= 1 */ |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Follow a file path */ |
/*-----------------------------------------------------------------------*/ |
|
static |
FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ |
DIR *dj, /* Directory object to return last directory and found object */ |
const TCHAR *path /* Full-path string to find a file or directory */ |
) |
{ |
FRESULT res; |
BYTE *dir, ns; |
|
|
#if _FS_RPATH |
if (*path == '/' || *path == '\\') { /* There is a heading separator */ |
path++; dj->sclust = 0; /* Strip it and start from the root dir */ |
} else { /* No heading separator */ |
dj->sclust = dj->fs->cdir; /* Start from the current dir */ |
} |
#else |
if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ |
path++; |
dj->sclust = 0; /* Start from the root dir */ |
#endif |
|
if ((UINT)*path < ' ') { /* Nul path means the start directory itself */ |
res = dir_sdi(dj, 0); |
dj->dir = 0; |
} else { /* Follow path */ |
for (;;) { |
res = create_name(dj, &path); /* Get a segment */ |
if (res != FR_OK) break; |
res = dir_find(dj); /* Find it */ |
ns = *(dj->fn+NS); |
if (res != FR_OK) { /* Failed to find the object */ |
if (res != FR_NO_FILE) break; /* Abort if any hard error occurred */ |
/* Object not found */ |
if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */ |
dj->sclust = 0; dj->dir = 0; /* It is the root dir */ |
res = FR_OK; |
if (!(ns & NS_LAST)) continue; |
} else { /* Could not find the object */ |
if (!(ns & NS_LAST)) res = FR_NO_PATH; |
} |
break; |
} |
if (ns & NS_LAST) break; /* Last segment match. Function completed. */ |
dir = dj->dir; /* There is next segment. Follow the sub directory */ |
if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ |
res = FR_NO_PATH; break; |
} |
dj->sclust = ld_clust(dj->fs, dir); |
} |
} |
|
return res; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Load a sector and check if it is an FAT Volume Boot Record */ |
/*-----------------------------------------------------------------------*/ |
|
static |
BYTE check_fs ( /* 0:FAT-VBR, 1:Any BR but not FAT, 2:Not a BR, 3:Disk error */ |
FATFS *fs, /* File system object */ |
DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ |
) |
{ |
unsigned i; |
|
if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */ |
return 3; |
if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */ |
return 2; |
#if 0 |
printf("Boot sector read\n"); |
for(i=0;i<512;i++){ |
if((i%16)==0){ |
printf("%03u : ", i); |
} |
printf("%02x ", fs->win[i]); |
if((i%16)==7){ |
printf(" "); |
} |
else if((i%16)==15){ |
printf("\n"); |
} |
} |
#endif |
|
if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ |
return 0; |
if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) |
return 0; |
|
return 1; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Check if the file system object is valid or not */ |
/*-----------------------------------------------------------------------*/ |
|
static |
FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */ |
const TCHAR **path, /* Pointer to pointer to the path name (drive number) */ |
FATFS **rfs, /* Pointer to pointer to the found file system object */ |
BYTE wmode /* !=0: Check write protection for write access */ |
) |
{ |
BYTE fmt, b, pi, *tbl; |
UINT vol; |
DSTATUS stat; |
DWORD bsect, fasize, tsect, sysect, nclst, szbfat; |
WORD nrsv; |
const TCHAR *p = *path; |
FATFS *fs; |
|
|
/* Get logical drive number from the path name */ |
vol = p[0] - '0'; /* Is there a drive number? */ |
if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */ |
p += 2; *path = p; /* Return pointer to the path name */ |
} else { /* No drive number is given */ |
#if _FS_RPATH |
vol = CurrVol; /* Use current drive */ |
#else |
vol = 0; /* Use drive 0 */ |
#endif |
} |
|
/* Check if the file system object is valid or not */ |
*rfs = 0; |
if (vol >= _VOLUMES) /* Is the drive number valid? */ |
return FR_INVALID_DRIVE; |
fs = FatFs[vol]; /* Get corresponding file system object */ |
if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ |
|
ENTER_FF(fs); /* Lock file system */ |
|
*rfs = fs; /* Return pointer to the corresponding file system object */ |
if (fs->fs_type) { /* If the volume has been mounted */ |
stat = disk_status(fs->drv); |
if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */ |
if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */ |
return FR_WRITE_PROTECTED; |
return FR_OK; /* The file system object is valid */ |
} |
} |
|
/* The file system object is not valid. */ |
/* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */ |
|
fs->fs_type = 0; /* Clear the file system object */ |
fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */ |
stat = disk_initialize(fs->drv); /* Initialize the physical drive */ |
if (stat & STA_NOINIT) /* Check if the initialization succeeded */ |
return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ |
if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */ |
return FR_WRITE_PROTECTED; |
#if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */ |
if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK) |
return FR_DISK_ERR; |
#endif |
/* Search FAT partition on the drive. Supports only generic partitions, FDISK and SFD. */ |
fmt = check_fs(fs, bsect = 0); /* Load sector 0 and check if it is an FAT-VBR (in SFD) */ |
|
if (LD2PT(vol) && !fmt) fmt = 1; /* Force non-SFD if the volume is forced partition */ |
#if 1 |
/* FIXME explain this */ |
fmt = 1; |
#endif |
if (fmt == 1) { /* Not an FAT-VBR, the physical drive can be partitioned */ |
/* Check the partition listed in the partition table */ |
pi = LD2PT(vol); |
if (pi) pi--; |
tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */ |
if (tbl[4]) { /* Is the partition existing? */ |
bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */ |
fmt = check_fs(fs, bsect); /* Check the partition */ |
} |
} |
if (fmt == 3) return FR_DISK_ERR; |
if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ |
|
/* An FAT volume is found. Following code initializes the file system object */ |
|
if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ |
return FR_NO_FILESYSTEM; |
|
fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */ |
if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32); |
fs->fsize = fasize; |
|
fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */ |
if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ |
fasize *= b; /* Number of sectors for FAT area */ |
|
fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ |
if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ |
|
fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */ |
if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */ |
|
tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */ |
if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32); |
|
nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */ |
if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */ |
|
/* Determine the FAT sub type */ |
sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */ |
if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ |
nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ |
if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ |
fmt = FS_FAT12; |
if (nclst >= MIN_FAT16) fmt = FS_FAT16; |
if (nclst >= MIN_FAT32) fmt = FS_FAT32; |
|
|
/* Boundaries and Limits */ |
fs->n_fatent = nclst + 2; /* Number of FAT entries */ |
fs->database = bsect + sysect; /* Data start sector */ |
fs->fatbase = bsect + nrsv; /* FAT start sector */ |
if (fmt == FS_FAT32) { |
if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ |
fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */ |
szbfat = fs->n_fatent * 4; /* (Required FAT size) */ |
} else { |
if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ |
fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ |
szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */ |
fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); |
} |
if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */ |
return FR_NO_FILESYSTEM; |
|
#if !_FS_READONLY |
/* Initialize cluster allocation information */ |
fs->free_clust = 0xFFFFFFFF; |
fs->last_clust = 0; |
|
/* Get fsinfo if available */ |
if (fmt == FS_FAT32) { |
fs->fsi_flag = 0; |
fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo); |
if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK && |
LD_WORD(fs->win+BS_55AA) == 0xAA55 && |
LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 && |
LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) { |
fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free); |
fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count); |
} |
} |
#endif |
fs->fs_type = fmt; /* FAT sub-type */ |
fs->id = ++Fsid; /* File system mount ID */ |
fs->winsect = 0; /* Invalidate sector cache */ |
fs->wflag = 0; |
#if _FS_RPATH |
fs->cdir = 0; /* Current directory (root dir) */ |
#endif |
#if _FS_LOCK /* Clear file lock semaphores */ |
clear_lock(fs); |
#endif |
|
return FR_OK; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Check if the file/dir object is valid or not */ |
/*-----------------------------------------------------------------------*/ |
|
static |
FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ |
void* obj /* Pointer to the object FIL/DIR to check validity */ |
) |
{ |
FIL *fil; |
|
|
fil = (FIL*)obj; /* Assuming offset of fs and id in the FIL/DIR is identical */ |
if (!fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id) |
return FR_INVALID_OBJECT; |
|
ENTER_FF(fil->fs); /* Lock file system */ |
|
if (disk_status(fil->fs->drv) & STA_NOINIT) |
return FR_NOT_READY; |
|
return FR_OK; |
} |
|
|
|
|
/*-------------------------------------------------------------------------- |
|
Public Functions |
|
--------------------------------------------------------------------------*/ |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Mount/Unmount a Logical Drive */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_mount ( |
BYTE vol, /* Logical drive number to be mounted/unmounted */ |
FATFS *fs /* Pointer to new file system object (NULL for unmount)*/ |
) |
{ |
FATFS *rfs; |
|
|
if (vol >= _VOLUMES) /* Check if the drive number is valid */ |
return FR_INVALID_DRIVE; |
rfs = FatFs[vol]; /* Get current fs object */ |
|
if (rfs) { |
#if _FS_LOCK |
clear_lock(rfs); |
#endif |
#if _FS_REENTRANT /* Discard sync object of the current volume */ |
if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR; |
#endif |
rfs->fs_type = 0; /* Clear old fs object */ |
} |
|
if (fs) { |
fs->fs_type = 0; /* Clear new fs object */ |
#if _FS_REENTRANT /* Create sync object for the new volume */ |
if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR; |
#endif |
} |
FatFs[vol] = fs; /* Register new fs object */ |
|
return FR_OK; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Open or Create a File */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_open ( |
FIL *fp, /* Pointer to the blank file object */ |
const TCHAR *path, /* Pointer to the file name */ |
BYTE mode /* Access mode and file open mode flags */ |
) |
{ |
FRESULT res; |
DIR dj; |
BYTE *dir; |
DEF_NAMEBUF; |
|
|
if (!fp) return FR_INVALID_OBJECT; |
fp->fs = 0; /* Clear file object */ |
|
#if !_FS_READONLY |
mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; |
res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ)); |
#else |
mode &= FA_READ; |
res = chk_mounted(&path, &dj.fs, 0); |
#endif |
if (res == FR_OK) { |
INIT_BUF(dj); |
res = follow_path(&dj, path); /* Follow the file path */ |
dir = dj.dir; |
#if !_FS_READONLY /* R/W configuration */ |
if (res == FR_OK) { |
if (!dir) /* Current dir itself */ |
res = FR_INVALID_NAME; |
#if _FS_LOCK |
else |
res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); |
#endif |
} |
/* Create or Open a file */ |
if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { |
DWORD dw, cl; |
|
if (res != FR_OK) { /* No file, create new */ |
if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ |
#if _FS_LOCK |
res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; |
#else |
res = dir_register(&dj); |
#endif |
mode |= FA_CREATE_ALWAYS; /* File is created */ |
dir = dj.dir; /* New entry */ |
} |
else { /* Any object is already existing */ |
if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ |
res = FR_DENIED; |
} else { |
if (mode & FA_CREATE_NEW) /* Cannot create as new file */ |
res = FR_EXIST; |
} |
} |
if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ |
dw = get_fattime(); /* Created time */ |
ST_DWORD(dir+DIR_CrtTime, dw); |
dir[DIR_Attr] = 0; /* Reset attribute */ |
ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */ |
cl = ld_clust(dj.fs, dir); /* Get start cluster */ |
st_clust(dir, 0); /* cluster = 0 */ |
dj.fs->wflag = 1; |
if (cl) { /* Remove the cluster chain if exist */ |
dw = dj.fs->winsect; |
res = remove_chain(dj.fs, cl); |
if (res == FR_OK) { |
dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ |
res = move_window(dj.fs, dw); |
} |
} |
} |
} |
else { /* Open an existing file */ |
if (res == FR_OK) { /* Follow succeeded */ |
if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ |
res = FR_NO_FILE; |
} else { |
if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ |
res = FR_DENIED; |
} |
} |
} |
if (res == FR_OK) { |
if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ |
mode |= FA__WRITTEN; |
fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ |
fp->dir_ptr = dir; |
#if _FS_LOCK |
fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); |
if (!fp->lockid) res = FR_INT_ERR; |
#endif |
} |
|
#else /* R/O configuration */ |
if (res == FR_OK) { /* Follow succeeded */ |
dir = dj.dir; |
if (!dir) { /* Current dir itself */ |
res = FR_INVALID_NAME; |
} else { |
if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ |
res = FR_NO_FILE; |
} |
} |
#endif |
FREE_BUF(); |
|
if (res == FR_OK) { |
fp->flag = mode; /* File access mode */ |
fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */ |
fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ |
fp->fptr = 0; /* File pointer */ |
fp->dsect = 0; |
#if _USE_FASTSEEK |
fp->cltbl = 0; /* Normal seek mode */ |
#endif |
fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */ |
} |
} |
|
LEAVE_FF(dj.fs, res); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Read File */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_read ( |
FIL *fp, /* Pointer to the file object */ |
void *buff, /* Pointer to data buffer */ |
UINT btr, /* Number of bytes to read */ |
UINT *br /* Pointer to number of bytes read */ |
) |
{ |
FRESULT res; |
DWORD clst, sect, remain; |
UINT rcnt, cc; |
BYTE csect, *rbuff = buff; |
|
|
*br = 0; /* Clear read byte counter */ |
|
res = validate(fp); /* Check validity */ |
if (res != FR_OK) LEAVE_FF(fp->fs, res); |
if (fp->flag & FA__ERROR) /* Aborted file? */ |
LEAVE_FF(fp->fs, FR_INT_ERR); |
if (!(fp->flag & FA_READ)) /* Check access mode */ |
LEAVE_FF(fp->fs, FR_DENIED); |
remain = fp->fsize - fp->fptr; |
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ |
|
for ( ; btr; /* Repeat until all data read */ |
rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { |
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ |
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ |
if (!csect) { /* On the cluster boundary? */ |
if (fp->fptr == 0) { /* On the top of the file? */ |
clst = fp->sclust; /* Follow from the origin */ |
} else { /* Middle or end of the file */ |
#if _USE_FASTSEEK |
if (fp->cltbl) |
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ |
else |
#endif |
clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ |
} |
if (clst < 2) ABORT(fp->fs, FR_INT_ERR); |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); |
fp->clust = clst; /* Update current cluster */ |
} |
sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ |
if (!sect) ABORT(fp->fs, FR_INT_ERR); |
sect += csect; |
cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ |
if (cc) { /* Read maximum contiguous sectors directly */ |
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ |
cc = fp->fs->csize - csect; |
if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK) |
ABORT(fp->fs, FR_DISK_ERR); |
#if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ |
#if _FS_TINY |
if (fp->fs->wflag && fp->fs->winsect - sect < cc) |
mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); |
#else |
if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) |
mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); |
#endif |
#endif |
rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ |
continue; |
} |
#if !_FS_TINY |
if (fp->dsect != sect) { /* Load data sector if not in cache */ |
#if !_FS_READONLY |
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) |
ABORT(fp->fs, FR_DISK_ERR); |
fp->flag &= ~FA__DIRTY; |
} |
#endif |
if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ |
ABORT(fp->fs, FR_DISK_ERR); |
} |
#endif |
fp->dsect = sect; |
} |
rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ |
if (rcnt > btr) rcnt = btr; |
#if _FS_TINY |
if (move_window(fp->fs, fp->dsect)) /* Move sector window */ |
ABORT(fp->fs, FR_DISK_ERR); |
mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ |
#else |
mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ |
#endif |
} |
|
LEAVE_FF(fp->fs, FR_OK); |
} |
|
|
|
|
#if !_FS_READONLY |
/*-----------------------------------------------------------------------*/ |
/* Write File */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_write ( |
FIL *fp, /* Pointer to the file object */ |
const void *buff, /* Pointer to the data to be written */ |
UINT btw, /* Number of bytes to write */ |
UINT *bw /* Pointer to number of bytes written */ |
) |
{ |
FRESULT res; |
DWORD clst, sect; |
UINT wcnt, cc; |
const BYTE *wbuff = buff; |
BYTE csect; |
|
|
*bw = 0; /* Clear write byte counter */ |
|
res = validate(fp); /* Check validity */ |
if (res != FR_OK) LEAVE_FF(fp->fs, res); |
if (fp->flag & FA__ERROR) /* Aborted file? */ |
LEAVE_FF(fp->fs, FR_INT_ERR); |
if (!(fp->flag & FA_WRITE)) /* Check access mode */ |
LEAVE_FF(fp->fs, FR_DENIED); |
if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0; /* File size cannot reach 4GB */ |
|
for ( ; btw; /* Repeat until all data written */ |
wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { |
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ |
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ |
if (!csect) { /* On the cluster boundary? */ |
if (fp->fptr == 0) { /* On the top of the file? */ |
clst = fp->sclust; /* Follow from the origin */ |
if (clst == 0) /* When no cluster is allocated, */ |
fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ |
} else { /* Middle or end of the file */ |
#if _USE_FASTSEEK |
if (fp->cltbl) |
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ |
else |
#endif |
clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ |
} |
if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ |
if (clst == 1) ABORT(fp->fs, FR_INT_ERR); |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); |
fp->clust = clst; /* Update current cluster */ |
} |
#if _FS_TINY |
if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */ |
ABORT(fp->fs, FR_DISK_ERR); |
#else |
if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) |
ABORT(fp->fs, FR_DISK_ERR); |
fp->flag &= ~FA__DIRTY; |
} |
#endif |
sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ |
if (!sect) ABORT(fp->fs, FR_INT_ERR); |
sect += csect; |
cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ |
if (cc) { /* Write maximum contiguous sectors directly */ |
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ |
cc = fp->fs->csize - csect; |
if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK) |
ABORT(fp->fs, FR_DISK_ERR); |
#if _FS_TINY |
if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ |
mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); |
fp->fs->wflag = 0; |
} |
#else |
if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ |
mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); |
fp->flag &= ~FA__DIRTY; |
} |
#endif |
wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ |
continue; |
} |
#if _FS_TINY |
if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ |
if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR); |
fp->fs->winsect = sect; |
} |
#else |
if (fp->dsect != sect) { /* Fill sector cache with file data */ |
if (fp->fptr < fp->fsize && |
disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) |
ABORT(fp->fs, FR_DISK_ERR); |
} |
#endif |
fp->dsect = sect; |
} |
wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */ |
if (wcnt > btw) wcnt = btw; |
#if _FS_TINY |
if (move_window(fp->fs, fp->dsect)) /* Move sector window */ |
ABORT(fp->fs, FR_DISK_ERR); |
mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ |
fp->fs->wflag = 1; |
#else |
mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ |
fp->flag |= FA__DIRTY; |
#endif |
} |
|
if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ |
fp->flag |= FA__WRITTEN; /* Set file change flag */ |
|
LEAVE_FF(fp->fs, FR_OK); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Synchronize the File Object */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_sync ( |
FIL *fp /* Pointer to the file object */ |
) |
{ |
FRESULT res; |
DWORD tim; |
BYTE *dir; |
|
|
res = validate(fp); /* Check validity of the object */ |
if (res == FR_OK) { |
if (fp->flag & FA__WRITTEN) { /* Has the file been written? */ |
#if !_FS_TINY /* Write-back dirty buffer */ |
if (fp->flag & FA__DIRTY) { |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) |
LEAVE_FF(fp->fs, FR_DISK_ERR); |
fp->flag &= ~FA__DIRTY; |
} |
#endif |
/* Update the directory entry */ |
res = move_window(fp->fs, fp->dir_sect); |
if (res == FR_OK) { |
dir = fp->dir_ptr; |
dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ |
ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */ |
st_clust(dir, fp->sclust); /* Update start cluster */ |
tim = get_fattime(); /* Update updated time */ |
ST_DWORD(dir+DIR_WrtTime, tim); |
ST_WORD(dir+DIR_LstAccDate, 0); |
fp->flag &= ~FA__WRITTEN; |
fp->fs->wflag = 1; |
res = sync(fp->fs); |
} |
} |
} |
|
LEAVE_FF(fp->fs, res); |
} |
|
#endif /* !_FS_READONLY */ |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Close File */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_close ( |
FIL *fp /* Pointer to the file object to be closed */ |
) |
{ |
FRESULT res; |
|
|
#if _FS_READONLY |
res = validate(fp); |
{ |
#if _FS_REENTRANT |
FATFS *fs = fp->fs; |
#endif |
if (res == FR_OK) fp->fs = 0; /* Discard file object */ |
LEAVE_FF(fs, res); |
} |
#else |
res = f_sync(fp); /* Flush cached data */ |
#if _FS_LOCK |
if (res == FR_OK) { /* Decrement open counter */ |
#if _FS_REENTRANT |
FATFS *fs = fp->fs;; |
res = validate(fp); |
if (res == FR_OK) { |
res = dec_lock(fp->lockid); |
unlock_fs(fs, FR_OK); |
} |
#else |
res = dec_lock(fp->lockid); |
#endif |
} |
#endif |
if (res == FR_OK) fp->fs = 0; /* Discard file object */ |
return res; |
#endif |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Current Drive/Directory Handlings */ |
/*-----------------------------------------------------------------------*/ |
|
#if _FS_RPATH >= 1 |
|
FRESULT f_chdrive ( |
BYTE drv /* Drive number */ |
) |
{ |
if (drv >= _VOLUMES) return FR_INVALID_DRIVE; |
|
CurrVol = drv; |
|
return FR_OK; |
} |
|
|
|
FRESULT f_chdir ( |
const TCHAR *path /* Pointer to the directory path */ |
) |
{ |
FRESULT res; |
DIR dj; |
DEF_NAMEBUF; |
|
|
res = chk_mounted(&path, &dj.fs, 0); |
if (res == FR_OK) { |
INIT_BUF(dj); |
res = follow_path(&dj, path); /* Follow the path */ |
FREE_BUF(); |
if (res == FR_OK) { /* Follow completed */ |
if (!dj.dir) { |
dj.fs->cdir = dj.sclust; /* Start directory itself */ |
} else { |
if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ |
dj.fs->cdir = ld_clust(dj.fs, dj.dir); |
else |
res = FR_NO_PATH; /* Reached but a file */ |
} |
} |
if (res == FR_NO_FILE) res = FR_NO_PATH; |
} |
|
LEAVE_FF(dj.fs, res); |
} |
|
|
#if _FS_RPATH >= 2 |
FRESULT f_getcwd ( |
TCHAR *path, /* Pointer to the directory path */ |
UINT sz_path /* Size of path */ |
) |
{ |
FRESULT res; |
DIR dj; |
UINT i, n; |
DWORD ccl; |
TCHAR *tp; |
FILINFO fno; |
DEF_NAMEBUF; |
|
|
*path = 0; |
res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */ |
if (res == FR_OK) { |
INIT_BUF(dj); |
i = sz_path; /* Bottom of buffer (dir stack base) */ |
dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */ |
while ((ccl = dj.sclust) != 0) { /* Repeat while current dir is a sub-dir */ |
res = dir_sdi(&dj, 1); /* Get parent dir */ |
if (res != FR_OK) break; |
res = dir_read(&dj); |
if (res != FR_OK) break; |
dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent dir */ |
res = dir_sdi(&dj, 0); |
if (res != FR_OK) break; |
do { /* Find the entry links to the child dir */ |
res = dir_read(&dj); |
if (res != FR_OK) break; |
if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */ |
res = dir_next(&dj, 0); |
} while (res == FR_OK); |
if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ |
if (res != FR_OK) break; |
#if _USE_LFN |
fno.lfname = path; |
fno.lfsize = i; |
#endif |
get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */ |
tp = fno.fname; |
if (_USE_LFN && *path) tp = path; |
for (n = 0; tp[n]; n++) ; |
if (i < n + 3) { |
res = FR_NOT_ENOUGH_CORE; break; |
} |
while (n) path[--i] = tp[--n]; |
path[--i] = '/'; |
} |
tp = path; |
if (res == FR_OK) { |
*tp++ = '0' + CurrVol; /* Put drive number */ |
*tp++ = ':'; |
if (i == sz_path) { /* Root-dir */ |
*tp++ = '/'; |
} else { /* Sub-dir */ |
do /* Add stacked path str */ |
*tp++ = path[i++]; |
while (i < sz_path); |
} |
} |
*tp = 0; |
FREE_BUF(); |
} |
|
LEAVE_FF(dj.fs, res); |
} |
#endif /* _FS_RPATH >= 2 */ |
#endif /* _FS_RPATH >= 1 */ |
|
|
|
#if _FS_MINIMIZE <= 2 |
/*-----------------------------------------------------------------------*/ |
/* Seek File R/W Pointer */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_lseek ( |
FIL *fp, /* Pointer to the file object */ |
DWORD ofs /* File pointer from top of file */ |
) |
{ |
FRESULT res; |
|
|
res = validate(fp); /* Check validity of the object */ |
if (res != FR_OK) LEAVE_FF(fp->fs, res); |
if (fp->flag & FA__ERROR) /* Check abort flag */ |
LEAVE_FF(fp->fs, FR_INT_ERR); |
|
#if _USE_FASTSEEK |
if (fp->cltbl) { /* Fast seek */ |
DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; |
|
if (ofs == CREATE_LINKMAP) { /* Create CLMT */ |
tbl = fp->cltbl; |
tlen = *tbl++; ulen = 2; /* Given table size and required table size */ |
cl = fp->sclust; /* Top of the chain */ |
if (cl) { |
do { |
/* Get a fragment */ |
tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ |
do { |
pcl = cl; ncl++; |
cl = get_fat(fp->fs, cl); |
if (cl <= 1) ABORT(fp->fs, FR_INT_ERR); |
if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); |
} while (cl == pcl + 1); |
if (ulen <= tlen) { /* Store the length and top of the fragment */ |
*tbl++ = ncl; *tbl++ = tcl; |
} |
} while (cl < fp->fs->n_fatent); /* Repeat until end of chain */ |
} |
*fp->cltbl = ulen; /* Number of items used */ |
if (ulen <= tlen) |
*tbl = 0; /* Terminate table */ |
else |
res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ |
|
} else { /* Fast seek */ |
if (ofs > fp->fsize) /* Clip offset at the file size */ |
ofs = fp->fsize; |
fp->fptr = ofs; /* Set file pointer */ |
if (ofs) { |
fp->clust = clmt_clust(fp, ofs - 1); |
dsc = clust2sect(fp->fs, fp->clust); |
if (!dsc) ABORT(fp->fs, FR_INT_ERR); |
dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1); |
if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */ |
#if !_FS_TINY |
#if !_FS_READONLY |
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) |
ABORT(fp->fs, FR_DISK_ERR); |
fp->flag &= ~FA__DIRTY; |
} |
#endif |
if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */ |
ABORT(fp->fs, FR_DISK_ERR); |
#endif |
fp->dsect = dsc; |
} |
} |
} |
} else |
#endif |
|
/* Normal Seek */ |
{ |
DWORD clst, bcs, nsect, ifptr; |
|
if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ |
#if !_FS_READONLY |
&& !(fp->flag & FA_WRITE) |
#endif |
) ofs = fp->fsize; |
|
ifptr = fp->fptr; |
fp->fptr = nsect = 0; |
if (ofs) { |
bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ |
if (ifptr > 0 && |
(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ |
fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ |
ofs -= fp->fptr; |
clst = fp->clust; |
} else { /* When seek to back cluster, */ |
clst = fp->sclust; /* start from the first cluster */ |
#if !_FS_READONLY |
if (clst == 0) { /* If no cluster chain, create a new chain */ |
clst = create_chain(fp->fs, 0); |
if (clst == 1) ABORT(fp->fs, FR_INT_ERR); |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); |
fp->sclust = clst; |
} |
#endif |
fp->clust = clst; |
} |
if (clst != 0) { |
while (ofs > bcs) { /* Cluster following loop */ |
#if !_FS_READONLY |
if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ |
clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ |
if (clst == 0) { /* When disk gets full, clip file size */ |
ofs = bcs; break; |
} |
} else |
#endif |
clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); |
if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); |
fp->clust = clst; |
fp->fptr += bcs; |
ofs -= bcs; |
} |
fp->fptr += ofs; |
if (ofs % SS(fp->fs)) { |
nsect = clust2sect(fp->fs, clst); /* Current sector */ |
if (!nsect) ABORT(fp->fs, FR_INT_ERR); |
nsect += ofs / SS(fp->fs); |
} |
} |
} |
if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ |
#if !_FS_TINY |
#if !_FS_READONLY |
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ |
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) |
ABORT(fp->fs, FR_DISK_ERR); |
fp->flag &= ~FA__DIRTY; |
} |
#endif |
if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ |
ABORT(fp->fs, FR_DISK_ERR); |
#endif |
fp->dsect = nsect; |
} |
#if !_FS_READONLY |
if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ |
fp->fsize = fp->fptr; |
fp->flag |= FA__WRITTEN; |
} |
#endif |
} |
|
LEAVE_FF(fp->fs, res); |
} |
|
|
|
#if _FS_MINIMIZE <= 1 |
/*-----------------------------------------------------------------------*/ |
/* Create a Directory Object */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_opendir ( |
DIR *dj, /* Pointer to directory object to create */ |
const TCHAR *path /* Pointer to the directory path */ |
) |
{ |
FRESULT res; |
FATFS *fs; |
DEF_NAMEBUF; |
|
|
if (!dj) return FR_INVALID_OBJECT; |
|
res = chk_mounted(&path, &dj->fs, 0); |
fs = dj->fs; |
if (res == FR_OK) { |
INIT_BUF(*dj); |
res = follow_path(dj, path); /* Follow the path to the directory */ |
FREE_BUF(); |
if (res == FR_OK) { /* Follow completed */ |
if (dj->dir) { /* It is not the root dir */ |
if (dj->dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ |
dj->sclust = ld_clust(fs, dj->dir); |
} else { /* The object is not a directory */ |
res = FR_NO_PATH; |
} |
} |
if (res == FR_OK) { |
dj->id = fs->id; |
res = dir_sdi(dj, 0); /* Rewind dir */ |
} |
} |
if (res == FR_NO_FILE) res = FR_NO_PATH; |
if (res != FR_OK) dj->fs = 0; /* Invalidate the dir object if function faild */ |
} else { |
dj->fs = 0; |
} |
|
LEAVE_FF(fs, res); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Read Directory Entry in Sequence */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_readdir ( |
DIR *dj, /* Pointer to the open directory object */ |
FILINFO *fno /* Pointer to file information to return */ |
) |
{ |
FRESULT res; |
DEF_NAMEBUF; |
|
res = validate(dj); /* Check validity of the object */ |
if (res == FR_OK) { |
if (!fno) { |
res = dir_sdi(dj, 0); /* Rewind the directory object */ |
} else { |
INIT_BUF(*dj); |
res = dir_read(dj); /* Read an directory item */ |
if (res == FR_NO_FILE) { /* Reached end of dir */ |
dj->sect = 0; |
res = FR_OK; |
} |
if (res == FR_OK) { /* A valid entry is found */ |
get_fileinfo(dj, fno); /* Get the object information */ |
res = dir_next(dj, 0); /* Increment index for next */ |
if (res == FR_NO_FILE) { |
dj->sect = 0; |
res = FR_OK; |
} |
} |
FREE_BUF(); |
} |
} |
|
LEAVE_FF(dj->fs, res); |
} |
|
|
|
#if _FS_MINIMIZE == 0 |
/*-----------------------------------------------------------------------*/ |
/* Get File Status */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_stat ( |
const TCHAR *path, /* Pointer to the file path */ |
FILINFO *fno /* Pointer to file information to return */ |
) |
{ |
FRESULT res; |
DIR dj; |
DEF_NAMEBUF; |
|
|
res = chk_mounted(&path, &dj.fs, 0); |
if (res == FR_OK) { |
INIT_BUF(dj); |
res = follow_path(&dj, path); /* Follow the file path */ |
if (res == FR_OK) { /* Follow completed */ |
if (dj.dir) /* Found an object */ |
get_fileinfo(&dj, fno); |
else /* It is root dir */ |
res = FR_INVALID_NAME; |
} |
FREE_BUF(); |
} |
|
LEAVE_FF(dj.fs, res); |
} |
|
|
|
#if !_FS_READONLY |
/*-----------------------------------------------------------------------*/ |
/* Get Number of Free Clusters */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_getfree ( |
const TCHAR *path, /* Pointer to the logical drive number (root dir) */ |
DWORD *nclst, /* Pointer to the variable to return number of free clusters */ |
FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */ |
) |
{ |
FRESULT res; |
FATFS *fs; |
DWORD n, clst, sect, stat; |
UINT i; |
BYTE fat, *p; |
|
|
/* Get drive number */ |
res = chk_mounted(&path, fatfs, 0); |
fs = *fatfs; |
if (res == FR_OK) { |
/* If free_clust is valid, return it without full cluster scan */ |
if (fs->free_clust <= fs->n_fatent - 2) { |
*nclst = fs->free_clust; |
} else { |
/* Get number of free clusters */ |
fat = fs->fs_type; |
n = 0; |
if (fat == FS_FAT12) { |
clst = 2; |
do { |
stat = get_fat(fs, clst); |
if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } |
if (stat == 1) { res = FR_INT_ERR; break; } |
if (stat == 0) n++; |
} while (++clst < fs->n_fatent); |
} else { |
clst = fs->n_fatent; |
sect = fs->fatbase; |
i = 0; p = 0; |
do { |
if (!i) { |
res = move_window(fs, sect++); |
if (res != FR_OK) break; |
p = fs->win; |
i = SS(fs); |
} |
if (fat == FS_FAT16) { |
if (LD_WORD(p) == 0) n++; |
p += 2; i -= 2; |
} else { |
if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++; |
p += 4; i -= 4; |
} |
} while (--clst); |
} |
fs->free_clust = n; |
if (fat == FS_FAT32) fs->fsi_flag = 1; |
*nclst = n; |
} |
} |
LEAVE_FF(fs, res); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Truncate File */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_truncate ( |
FIL *fp /* Pointer to the file object */ |
) |
{ |
FRESULT res; |
DWORD ncl; |
|
|
if (!fp) return FR_INVALID_OBJECT; |
|
res = validate(fp); /* Check validity of the object */ |
if (res == FR_OK) { |
if (fp->flag & FA__ERROR) { /* Check abort flag */ |
res = FR_INT_ERR; |
} else { |
if (!(fp->flag & FA_WRITE)) /* Check access mode */ |
res = FR_DENIED; |
} |
} |
if (res == FR_OK) { |
if (fp->fsize > fp->fptr) { |
fp->fsize = fp->fptr; /* Set file size to current R/W point */ |
fp->flag |= FA__WRITTEN; |
if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ |
res = remove_chain(fp->fs, fp->sclust); |
fp->sclust = 0; |
} else { /* When truncate a part of the file, remove remaining clusters */ |
ncl = get_fat(fp->fs, fp->clust); |
res = FR_OK; |
if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; |
if (ncl == 1) res = FR_INT_ERR; |
if (res == FR_OK && ncl < fp->fs->n_fatent) { |
res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); |
if (res == FR_OK) res = remove_chain(fp->fs, ncl); |
} |
} |
} |
if (res != FR_OK) fp->flag |= FA__ERROR; |
} |
|
LEAVE_FF(fp->fs, res); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Delete a File or Directory */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_unlink ( |
const TCHAR *path /* Pointer to the file or directory path */ |
) |
{ |
FRESULT res; |
DIR dj, sdj; |
BYTE *dir; |
DWORD dclst; |
DEF_NAMEBUF; |
|
|
res = chk_mounted(&path, &dj.fs, 1); |
if (res == FR_OK) { |
INIT_BUF(dj); |
res = follow_path(&dj, path); /* Follow the file path */ |
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) |
res = FR_INVALID_NAME; /* Cannot remove dot entry */ |
#if _FS_LOCK |
if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */ |
#endif |
if (res == FR_OK) { /* The object is accessible */ |
dir = dj.dir; |
if (!dir) { |
res = FR_INVALID_NAME; /* Cannot remove the start directory */ |
} else { |
if (dir[DIR_Attr] & AM_RDO) |
res = FR_DENIED; /* Cannot remove R/O object */ |
} |
dclst = ld_clust(dj.fs, dir); |
if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */ |
if (dclst < 2) { |
res = FR_INT_ERR; |
} else { |
mem_cpy(&sdj, &dj, sizeof (DIR)); /* Check if the sub-dir is empty or not */ |
sdj.sclust = dclst; |
res = dir_sdi(&sdj, 2); /* Exclude dot entries */ |
if (res == FR_OK) { |
res = dir_read(&sdj); |
if (res == FR_OK /* Not empty dir */ |
#if _FS_RPATH |
|| dclst == dj.fs->cdir /* Current dir */ |
#endif |
) res = FR_DENIED; |
if (res == FR_NO_FILE) res = FR_OK; /* Empty */ |
} |
} |
} |
if (res == FR_OK) { |
res = dir_remove(&dj); /* Remove the directory entry */ |
if (res == FR_OK) { |
if (dclst) /* Remove the cluster chain if exist */ |
res = remove_chain(dj.fs, dclst); |
if (res == FR_OK) res = sync(dj.fs); |
} |
} |
} |
FREE_BUF(); |
} |
LEAVE_FF(dj.fs, res); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Create a Directory */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_mkdir ( |
const TCHAR *path /* Pointer to the directory path */ |
) |
{ |
FRESULT res; |
DIR dj; |
BYTE *dir, n; |
DWORD dsc, dcl, pcl, tim = get_fattime(); |
DEF_NAMEBUF; |
|
|
res = chk_mounted(&path, &dj.fs, 1); |
if (res == FR_OK) { |
INIT_BUF(dj); |
res = follow_path(&dj, path); /* Follow the file path */ |
if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ |
if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT)) |
res = FR_INVALID_NAME; |
if (res == FR_NO_FILE) { /* Can create a new directory */ |
dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ |
res = FR_OK; |
if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ |
if (dcl == 1) res = FR_INT_ERR; |
if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; |
if (res == FR_OK) /* Flush FAT */ |
res = move_window(dj.fs, 0); |
if (res == FR_OK) { /* Initialize the new directory table */ |
dsc = clust2sect(dj.fs, dcl); |
dir = dj.fs->win; |
mem_set(dir, 0, SS(dj.fs)); |
mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */ |
dir[DIR_Name] = '.'; |
dir[DIR_Attr] = AM_DIR; |
ST_DWORD(dir+DIR_WrtTime, tim); |
st_clust(dir, dcl); |
mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */ |
dir[33] = '.'; pcl = dj.sclust; |
if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) |
pcl = 0; |
st_clust(dir+SZ_DIR, pcl); |
for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ |
dj.fs->winsect = dsc++; |
dj.fs->wflag = 1; |
res = move_window(dj.fs, 0); |
if (res != FR_OK) break; |
mem_set(dir, 0, SS(dj.fs)); |
} |
} |
if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ |
if (res != FR_OK) { |
remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ |
} else { |
dir = dj.dir; |
dir[DIR_Attr] = AM_DIR; /* Attribute */ |
ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */ |
st_clust(dir, dcl); /* Table start cluster */ |
dj.fs->wflag = 1; |
res = sync(dj.fs); |
} |
} |
FREE_BUF(); |
} |
|
LEAVE_FF(dj.fs, res); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Change Attribute */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_chmod ( |
const TCHAR *path, /* Pointer to the file path */ |
BYTE value, /* Attribute bits */ |
BYTE mask /* Attribute mask to change */ |
) |
{ |
FRESULT res; |
DIR dj; |
BYTE *dir; |
DEF_NAMEBUF; |
|
|
res = chk_mounted(&path, &dj.fs, 1); |
if (res == FR_OK) { |
INIT_BUF(dj); |
res = follow_path(&dj, path); /* Follow the file path */ |
FREE_BUF(); |
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) |
res = FR_INVALID_NAME; |
if (res == FR_OK) { |
dir = dj.dir; |
if (!dir) { /* Is it a root directory? */ |
res = FR_INVALID_NAME; |
} else { /* File or sub directory */ |
mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ |
dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ |
dj.fs->wflag = 1; |
res = sync(dj.fs); |
} |
} |
} |
|
LEAVE_FF(dj.fs, res); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Change Timestamp */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_utime ( |
const TCHAR *path, /* Pointer to the file/directory name */ |
const FILINFO *fno /* Pointer to the time stamp to be set */ |
) |
{ |
FRESULT res; |
DIR dj; |
BYTE *dir; |
DEF_NAMEBUF; |
|
|
res = chk_mounted(&path, &dj.fs, 1); |
if (res == FR_OK) { |
INIT_BUF(dj); |
res = follow_path(&dj, path); /* Follow the file path */ |
FREE_BUF(); |
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) |
res = FR_INVALID_NAME; |
if (res == FR_OK) { |
dir = dj.dir; |
if (!dir) { /* Root directory */ |
res = FR_INVALID_NAME; |
} else { /* File or sub-directory */ |
ST_WORD(dir+DIR_WrtTime, fno->ftime); |
ST_WORD(dir+DIR_WrtDate, fno->fdate); |
dj.fs->wflag = 1; |
res = sync(dj.fs); |
} |
} |
} |
|
LEAVE_FF(dj.fs, res); |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Rename File/Directory */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_rename ( |
const TCHAR *path_old, /* Pointer to the old name */ |
const TCHAR *path_new /* Pointer to the new name */ |
) |
{ |
FRESULT res; |
DIR djo, djn; |
BYTE buf[21], *dir; |
DWORD dw; |
DEF_NAMEBUF; |
|
|
res = chk_mounted(&path_old, &djo.fs, 1); |
if (res == FR_OK) { |
djn.fs = djo.fs; |
INIT_BUF(djo); |
res = follow_path(&djo, path_old); /* Check old object */ |
if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT)) |
res = FR_INVALID_NAME; |
#if _FS_LOCK |
if (res == FR_OK) res = chk_lock(&djo, 2); |
#endif |
if (res == FR_OK) { /* Old object is found */ |
if (!djo.dir) { /* Is root dir? */ |
res = FR_NO_FILE; |
} else { |
mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */ |
mem_cpy(&djn, &djo, sizeof (DIR)); /* Check new object */ |
res = follow_path(&djn, path_new); |
if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ |
if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */ |
/* Start critical section that an interruption or error can cause cross-link */ |
res = dir_register(&djn); /* Register the new entry */ |
if (res == FR_OK) { |
dir = djn.dir; /* Copy object information except for name */ |
mem_cpy(dir+13, buf+2, 19); |
dir[DIR_Attr] = buf[0] | AM_ARC; |
djo.fs->wflag = 1; |
if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */ |
dw = clust2sect(djo.fs, ld_clust(djo.fs, dir)); |
if (!dw) { |
res = FR_INT_ERR; |
} else { |
res = move_window(djo.fs, dw); |
dir = djo.fs->win+SZ_DIR; /* .. entry */ |
if (res == FR_OK && dir[1] == '.') { |
dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust; |
st_clust(dir, dw); |
djo.fs->wflag = 1; |
} |
} |
} |
if (res == FR_OK) { |
res = dir_remove(&djo); /* Remove old entry */ |
if (res == FR_OK) |
res = sync(djo.fs); |
} |
} |
/* End critical section */ |
} |
} |
} |
FREE_BUF(); |
} |
LEAVE_FF(djo.fs, res); |
} |
|
#endif /* !_FS_READONLY */ |
#endif /* _FS_MINIMIZE == 0 */ |
#endif /* _FS_MINIMIZE <= 1 */ |
#endif /* _FS_MINIMIZE <= 2 */ |
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Forward data to the stream directly (available on only tiny cfg) */ |
/*-----------------------------------------------------------------------*/ |
#if _USE_FORWARD && _FS_TINY |
|
FRESULT f_forward ( |
FIL *fp, /* Pointer to the file object */ |
UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ |
UINT btr, /* Number of bytes to forward */ |
UINT *bf /* Pointer to number of bytes forwarded */ |
) |
{ |
FRESULT res; |
DWORD remain, clst, sect; |
UINT rcnt; |
BYTE csect; |
|
|
*bf = 0; /* Clear transfer byte counter */ |
|
if (!fp) return FR_INVALID_OBJECT; |
|
res = validate(fp); /* Check validity of the object */ |
if (res != FR_OK) LEAVE_FF(fp->fs, res); |
if (fp->flag & FA__ERROR) /* Check error flag */ |
LEAVE_FF(fp->fs, FR_INT_ERR); |
if (!(fp->flag & FA_READ)) /* Check access mode */ |
LEAVE_FF(fp->fs, FR_DENIED); |
|
remain = fp->fsize - fp->fptr; |
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ |
|
for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ |
fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) { |
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ |
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ |
if (!csect) { /* On the cluster boundary? */ |
clst = (fp->fptr == 0) ? /* On the top of the file? */ |
fp->sclust : get_fat(fp->fs, fp->clust); |
if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); |
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); |
fp->clust = clst; /* Update current cluster */ |
} |
} |
sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ |
if (!sect) ABORT(fp->fs, FR_INT_ERR); |
sect += csect; |
if (move_window(fp->fs, sect)) /* Move sector window */ |
ABORT(fp->fs, FR_DISK_ERR); |
fp->dsect = sect; |
rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ |
if (rcnt > btr) rcnt = btr; |
rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); |
if (!rcnt) ABORT(fp->fs, FR_INT_ERR); |
} |
|
LEAVE_FF(fp->fs, FR_OK); |
} |
#endif /* _USE_FORWARD */ |
|
|
|
#if _USE_MKFS && !_FS_READONLY |
/*-----------------------------------------------------------------------*/ |
/* Create File System on the Drive */ |
/*-----------------------------------------------------------------------*/ |
#define N_ROOTDIR 512 /* Number of root dir entries for FAT12/16 */ |
#define N_FATS 1 /* Number of FAT copies (1 or 2) */ |
|
|
FRESULT f_mkfs ( |
BYTE drv, /* Logical drive number */ |
BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ |
UINT au /* Allocation unit size [bytes] */ |
) |
{ |
static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; |
static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; |
BYTE fmt, md, sys, *tbl, pdrv, part; |
DWORD n_clst, vs, n, wsect; |
UINT i; |
DWORD b_vol, b_fat, b_dir, b_data; /* LBA */ |
DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ |
FATFS *fs; |
DSTATUS stat; |
|
|
/* Check mounted drive and clear work area */ |
if (drv >= _VOLUMES) return FR_INVALID_DRIVE; |
if (sfd > 1) return FR_INVALID_PARAMETER; |
if (au & (au - 1)) return FR_INVALID_PARAMETER; |
fs = FatFs[drv]; |
if (!fs) return FR_NOT_ENABLED; |
fs->fs_type = 0; |
pdrv = LD2PD(drv); /* Physical drive */ |
part = LD2PT(drv); /* Partition (0:auto detect, 1-4:get from partition table)*/ |
|
/* Get disk statics */ |
stat = disk_initialize(pdrv); |
if (stat & STA_NOINIT) return FR_NOT_READY; |
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; |
#if _MAX_SS != 512 /* Get disk sector size */ |
if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS) |
return FR_DISK_ERR; |
#endif |
if (_MULTI_PARTITION && part) { |
/* Get partition information from partition table in the MBR */ |
if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; |
if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; |
tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; |
if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */ |
b_vol = LD_DWORD(tbl+8); /* Volume start sector */ |
n_vol = LD_DWORD(tbl+12); /* Volume size */ |
} else { |
/* Create a partition in this function */ |
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) |
return FR_DISK_ERR; |
b_vol = (sfd) ? 0 : 63; /* Volume start sector */ |
n_vol -= b_vol; /* Volume size */ |
} |
|
if (!au) { /* AU auto selection */ |
vs = n_vol / (2000 / (SS(fs) / 512)); |
for (i = 0; vs < vst[i]; i++) ; |
au = cst[i]; |
} |
au /= SS(fs); /* Number of sectors per cluster */ |
if (au == 0) au = 1; |
if (au > 128) au = 128; |
|
/* Pre-compute number of clusters and FAT sub-type */ |
n_clst = n_vol / au; |
fmt = FS_FAT12; |
if (n_clst >= MIN_FAT16) fmt = FS_FAT16; |
if (n_clst >= MIN_FAT32) fmt = FS_FAT32; |
|
/* Determine offset and size of FAT structure */ |
if (fmt == FS_FAT32) { |
n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); |
n_rsv = 32; |
n_dir = 0; |
} else { |
n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; |
n_fat = (n_fat + SS(fs) - 1) / SS(fs); |
n_rsv = 1; |
n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs); |
} |
b_fat = b_vol + n_rsv; /* FAT area start sector */ |
b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ |
b_data = b_dir + n_dir; /* Data area start sector */ |
if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ |
|
/* Align data start sector to erase block boundary (for flash memory media) */ |
if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; |
n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ |
n = (n - b_data) / N_FATS; |
if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ |
n_rsv += n; |
b_fat += n; |
} else { /* FAT12/16: Expand FAT size */ |
n_fat += n; |
} |
|
/* Determine number of clusters and final check of validity of the FAT sub-type */ |
n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; |
if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) |
|| (fmt == FS_FAT32 && n_clst < MIN_FAT32)) |
return FR_MKFS_ABORTED; |
|
switch (fmt) { /* Determine system ID for partition table */ |
case FS_FAT12: sys = 0x01; break; |
case FS_FAT16: sys = (n_vol < 0x10000) ? 0x04 : 0x06; break; |
default: sys = 0x0C; |
} |
|
if (_MULTI_PARTITION && part) { |
/* Update system ID in the partition table */ |
tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; |
tbl[4] = sys; |
if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; |
md = 0xF8; |
} else { |
if (sfd) { /* No partition table (SFD) */ |
md = 0xF0; |
} else { /* Create partition table (FDISK) */ |
mem_set(fs->win, 0, SS(fs)); |
tbl = fs->win+MBR_Table; /* Create partition table for single partition in the drive */ |
tbl[1] = 1; /* Partition start head */ |
tbl[2] = 1; /* Partition start sector */ |
tbl[3] = 0; /* Partition start cylinder */ |
tbl[4] = sys; /* System type */ |
tbl[5] = 254; /* Partition end head */ |
n = (b_vol + n_vol) / 63 / 255; |
tbl[6] = (BYTE)((n >> 2) | 63); /* Partition end sector */ |
tbl[7] = (BYTE)n; /* End cylinder */ |
ST_DWORD(tbl+8, 63); /* Partition start in LBA */ |
ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */ |
ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */ |
if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR sector */ |
return FR_DISK_ERR; |
md = 0xF8; |
} |
} |
|
/* Create BPB in the VBR */ |
tbl = fs->win; /* Clear sector */ |
mem_set(tbl, 0, SS(fs)); |
mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ |
i = SS(fs); /* Sector size */ |
ST_WORD(tbl+BPB_BytsPerSec, i); |
tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ |
ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ |
tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ |
i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */ |
ST_WORD(tbl+BPB_RootEntCnt, i); |
if (n_vol < 0x10000) { /* Number of total sectors */ |
ST_WORD(tbl+BPB_TotSec16, n_vol); |
} else { |
ST_DWORD(tbl+BPB_TotSec32, n_vol); |
} |
tbl[BPB_Media] = md; /* Media descriptor */ |
ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */ |
ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */ |
ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */ |
n = get_fattime(); /* Use current time as VSN */ |
if (fmt == FS_FAT32) { |
ST_DWORD(tbl+BS_VolID32, n); /* VSN */ |
ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */ |
ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */ |
ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */ |
ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */ |
tbl[BS_DrvNum32] = 0x80; /* Drive number */ |
tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ |
mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ |
} else { |
ST_DWORD(tbl+BS_VolID, n); /* VSN */ |
ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */ |
tbl[BS_DrvNum] = 0x80; /* Drive number */ |
tbl[BS_BootSig] = 0x29; /* Extended boot signature */ |
mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ |
} |
ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ |
if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */ |
return FR_DISK_ERR; |
if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */ |
disk_write(pdrv, tbl, b_vol + 6, 1); |
|
/* Initialize FAT area */ |
wsect = b_fat; |
for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ |
mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ |
n = md; /* Media descriptor byte */ |
if (fmt != FS_FAT32) { |
n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; |
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */ |
} else { |
n |= 0xFFFFFF00; |
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */ |
ST_DWORD(tbl+4, 0xFFFFFFFF); |
ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */ |
} |
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) |
return FR_DISK_ERR; |
mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ |
for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ |
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) |
return FR_DISK_ERR; |
} |
} |
|
/* Initialize root directory */ |
i = (fmt == FS_FAT32) ? au : n_dir; |
do { |
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) |
return FR_DISK_ERR; |
} while (--i); |
|
#if _USE_ERASE /* Erase data area if needed */ |
{ |
DWORD eb[2]; |
|
eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; |
disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb); |
} |
#endif |
|
/* Create FSInfo if needed */ |
if (fmt == FS_FAT32) { |
ST_DWORD(tbl+FSI_LeadSig, 0x41615252); |
ST_DWORD(tbl+FSI_StrucSig, 0x61417272); |
ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */ |
ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */ |
ST_WORD(tbl+BS_55AA, 0xAA55); |
disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */ |
disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */ |
} |
|
return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; |
} |
|
|
#if _MULTI_PARTITION == 2 |
/*-----------------------------------------------------------------------*/ |
/* Divide Physical Drive */ |
/*-----------------------------------------------------------------------*/ |
|
FRESULT f_fdisk ( |
BYTE pdrv, /* Physical drive number */ |
const DWORD szt[], /* Pointer to the size table for each partitions */ |
void* work /* Pointer to the working buffer */ |
) |
{ |
UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; |
BYTE s_hd, e_hd, *p, *buf = (BYTE*)work; |
DSTATUS stat; |
DWORD sz_disk, sz_part, s_part; |
|
|
stat = disk_initialize(pdrv); |
if (stat & STA_NOINIT) return FR_NOT_READY; |
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; |
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; |
|
/* Determine CHS in the table regardless of the drive geometry */ |
for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; |
if (n == 256) n--; |
e_hd = n - 1; |
sz_cyl = 63 * n; |
tot_cyl = sz_disk / sz_cyl; |
|
/* Create partition table */ |
mem_set(buf, 0, _MAX_SS); |
p = buf + MBR_Table; b_cyl = 0; |
for (i = 0; i < 4; i++, p += SZ_PTE) { |
p_cyl = (szt[i] <= 100) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; |
if (!p_cyl) continue; |
s_part = (DWORD)sz_cyl * b_cyl; |
sz_part = (DWORD)sz_cyl * p_cyl; |
if (i == 0) { /* Exclude first track of cylinder 0 */ |
s_hd = 1; |
s_part += 63; sz_part -= 63; |
} else { |
s_hd = 0; |
} |
e_cyl = b_cyl + p_cyl - 1; |
if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER; |
|
/* Set partition table */ |
p[1] = s_hd; /* Start head */ |
p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */ |
p[3] = (BYTE)b_cyl; /* Start cylinder */ |
p[4] = 0x06; /* System type (temporary setting) */ |
p[5] = e_hd; /* End head */ |
p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */ |
p[7] = (BYTE)e_cyl; /* End cylinder */ |
ST_DWORD(p + 8, s_part); /* Start sector in LBA */ |
ST_DWORD(p + 12, sz_part); /* Partition size */ |
|
/* Next partition */ |
b_cyl += p_cyl; |
} |
ST_WORD(p, 0xAA55); |
|
/* Write it to the MBR */ |
return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK; |
} |
|
|
#endif /* _MULTI_PARTITION == 2 */ |
#endif /* _USE_MKFS && !_FS_READONLY */ |
|
|
|
|
#if _USE_STRFUNC |
/*-----------------------------------------------------------------------*/ |
/* Get a string from the file */ |
/*-----------------------------------------------------------------------*/ |
TCHAR* f_gets ( |
TCHAR* buff, /* Pointer to the string buffer to read */ |
int len, /* Size of string buffer (characters) */ |
FIL* fil /* Pointer to the file object */ |
) |
{ |
int n = 0; |
TCHAR c, *p = buff; |
BYTE s[2]; |
UINT rc; |
|
|
while (n < len - 1) { /* Read bytes until buffer gets filled */ |
f_read(fil, s, 1, &rc); |
if (rc != 1) break; /* Break on EOF or error */ |
c = s[0]; |
#if _LFN_UNICODE /* Read a character in UTF-8 encoding */ |
if (c >= 0x80) { |
if (c < 0xC0) continue; /* Skip stray trailer */ |
if (c < 0xE0) { /* Two-byte sequence */ |
f_read(fil, s, 1, &rc); |
if (rc != 1) break; |
c = ((c & 0x1F) << 6) | (s[0] & 0x3F); |
if (c < 0x80) c = '?'; |
} else { |
if (c < 0xF0) { /* Three-byte sequence */ |
f_read(fil, s, 2, &rc); |
if (rc != 2) break; |
c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F); |
if (c < 0x800) c = '?'; |
} else { /* Reject four-byte sequence */ |
c = '?'; |
} |
} |
} |
#endif |
#if _USE_STRFUNC >= 2 |
if (c == '\r') continue; /* Strip '\r' */ |
#endif |
*p++ = c; |
n++; |
if (c == '\n') break; /* Break on EOL */ |
} |
*p = 0; |
return n ? buff : 0; /* When no data read (eof or error), return with error. */ |
} |
|
|
|
#if !_FS_READONLY |
#include <stdarg.h> |
/*-----------------------------------------------------------------------*/ |
/* Put a character to the file */ |
/*-----------------------------------------------------------------------*/ |
int f_putc ( |
TCHAR c, /* A character to be output */ |
FIL* fil /* Pointer to the file object */ |
) |
{ |
UINT bw, btw; |
BYTE s[3]; |
|
|
#if _USE_STRFUNC >= 2 |
if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */ |
#endif |
|
#if _LFN_UNICODE /* Write the character in UTF-8 encoding */ |
if (c < 0x80) { /* 7-bit */ |
s[0] = (BYTE)c; |
btw = 1; |
} else { |
if (c < 0x800) { /* 11-bit */ |
s[0] = (BYTE)(0xC0 | (c >> 6)); |
s[1] = (BYTE)(0x80 | (c & 0x3F)); |
btw = 2; |
} else { /* 16-bit */ |
s[0] = (BYTE)(0xE0 | (c >> 12)); |
s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F)); |
s[2] = (BYTE)(0x80 | (c & 0x3F)); |
btw = 3; |
} |
} |
#else /* Write the character without conversion */ |
s[0] = (BYTE)c; |
btw = 1; |
#endif |
f_write(fil, s, btw, &bw); /* Write the char to the file */ |
return (bw == btw) ? 1 : EOF; /* Return the result */ |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Put a string to the file */ |
/*-----------------------------------------------------------------------*/ |
int f_puts ( |
const TCHAR* str, /* Pointer to the string to be output */ |
FIL* fil /* Pointer to the file object */ |
) |
{ |
int n; |
|
|
for (n = 0; *str; str++, n++) { |
if (f_putc(*str, fil) == EOF) return EOF; |
} |
return n; |
} |
|
|
|
|
/*-----------------------------------------------------------------------*/ |
/* Put a formatted string to the file */ |
/*-----------------------------------------------------------------------*/ |
int f_printf ( |
FIL* fil, /* Pointer to the file object */ |
const TCHAR* str, /* Pointer to the format string */ |
... /* Optional arguments... */ |
) |
{ |
va_list arp; |
BYTE f, r; |
UINT i, j, w; |
ULONG v; |
TCHAR c, d, s[16], *p; |
int res, chc, cc; |
|
|
va_start(arp, str); |
|
for (cc = res = 0; cc != EOF; res += cc) { |
c = *str++; |
if (c == 0) break; /* End of string */ |
if (c != '%') { /* Non escape character */ |
cc = f_putc(c, fil); |
if (cc != EOF) cc = 1; |
continue; |
} |
w = f = 0; |
c = *str++; |
if (c == '0') { /* Flag: '0' padding */ |
f = 1; c = *str++; |
} else { |
if (c == '-') { /* Flag: left justified */ |
f = 2; c = *str++; |
} |
} |
while (IsDigit(c)) { /* Precision */ |
w = w * 10 + c - '0'; |
c = *str++; |
} |
if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ |
f |= 4; c = *str++; |
} |
if (!c) break; |
d = c; |
if (IsLower(d)) d -= 0x20; |
switch (d) { /* Type is... */ |
case 'S' : /* String */ |
p = va_arg(arp, TCHAR*); |
for (j = 0; p[j]; j++) ; |
chc = 0; |
if (!(f & 2)) { |
while (j++ < w) chc += (cc = f_putc(' ', fil)); |
} |
chc += (cc = f_puts(p, fil)); |
while (j++ < w) chc += (cc = f_putc(' ', fil)); |
if (cc != EOF) cc = chc; |
continue; |
case 'C' : /* Character */ |
cc = f_putc((TCHAR)va_arg(arp, int), fil); continue; |
case 'B' : /* Binary */ |
r = 2; break; |
case 'O' : /* Octal */ |
r = 8; break; |
case 'D' : /* Signed decimal */ |
case 'U' : /* Unsigned decimal */ |
r = 10; break; |
case 'X' : /* Hexdecimal */ |
r = 16; break; |
default: /* Unknown type (pass-through) */ |
cc = f_putc(c, fil); continue; |
} |
|
/* Get an argument and put it in numeral */ |
v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int)); |
if (d == 'D' && (v & 0x80000000)) { |
v = 0 - v; |
f |= 8; |
} |
i = 0; |
do { |
d = (TCHAR)(v % r); v /= r; |
if (d > 9) d += (c == 'x') ? 0x27 : 0x07; |
s[i++] = d + '0'; |
} while (v && i < sizeof s / sizeof s[0]); |
if (f & 8) s[i++] = '-'; |
j = i; d = (f & 1) ? '0' : ' '; |
res = 0; |
while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil)); |
do res += (cc = f_putc(s[--i], fil)); while(i); |
while (j++ < w) res += (cc = f_putc(' ', fil)); |
if (cc != EOF) cc = res; |
} |
|
va_end(arp); |
return (cc == EOF) ? cc : res; |
} |
|
#endif /* !_FS_READONLY */ |
#endif /* _USE_STRFUNC */ |