Timóteo Mendes
Example for reading and writing SD card using SPI mode.
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Demo_NucleoF4xx_SD_Card
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不韋 呂
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ff.cpp
00001 /*----------------------------------------------------------------------------/ 00002 / FatFs - FAT file system module R0.09a (C)ChaN, 2012 00003 /-----------------------------------------------------------------------------/ 00004 / FatFs module is a generic FAT file system module for small embedded systems. 00005 / This is a free software that opened for education, research and commercial 00006 / developments under license policy of following terms. 00007 / 00008 / Copyright (C) 2012, ChaN, all right reserved. 00009 / 00010 / * The FatFs module is a free software and there is NO WARRANTY. 00011 / * No restriction on use. You can use, modify and redistribute it for 00012 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. 00013 / * Redistributions of source code must retain the above copyright notice. 00014 / 00015 /-----------------------------------------------------------------------------/ 00016 / Feb 26,'06 R0.00 Prototype. 00017 / 00018 / Apr 29,'06 R0.01 First stable version. 00019 / 00020 / Jun 01,'06 R0.02 Added FAT12 support. 00021 / Removed unbuffered mode. 00022 / Fixed a problem on small (<32M) partition. 00023 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). 00024 / 00025 / Sep 22,'06 R0.03 Added f_rename(). 00026 / Changed option _FS_MINIMUM to _FS_MINIMIZE. 00027 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast. 00028 / Fixed f_mkdir() creates incorrect directory on FAT32. 00029 / 00030 / Feb 04,'07 R0.04 Supported multiple drive system. 00031 / Changed some interfaces for multiple drive system. 00032 / Changed f_mountdrv() to f_mount(). 00033 / Added f_mkfs(). 00034 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive. 00035 / Added a capability of extending file size to f_lseek(). 00036 / Added minimization level 3. 00037 / Fixed an endian sensitive code in f_mkfs(). 00038 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. 00039 / Added FSInfo support. 00040 / Fixed DBCS name can result FR_INVALID_NAME. 00041 / Fixed short seek (<= csize) collapses the file object. 00042 / 00043 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). 00044 / Fixed f_mkfs() on FAT32 creates incorrect FSInfo. 00045 / Fixed f_mkdir() on FAT32 creates incorrect directory. 00046 / Feb 03,'08 R0.05a Added f_truncate() and f_utime(). 00047 / Fixed off by one error at FAT sub-type determination. 00048 / Fixed btr in f_read() can be mistruncated. 00049 / Fixed cached sector is not flushed when create and close without write. 00050 / 00051 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). 00052 / Improved performance of f_lseek() on moving to the same or following cluster. 00053 / 00054 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY) 00055 / Added long file name feature. 00056 / Added multiple code page feature. 00057 / Added re-entrancy for multitask operation. 00058 / Added auto cluster size selection to f_mkfs(). 00059 / Added rewind option to f_readdir(). 00060 / Changed result code of critical errors. 00061 / Renamed string functions to avoid name collision. 00062 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg. 00063 / Added multiple sector size feature. 00064 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error. 00065 / Fixed wrong cache control in f_lseek(). 00066 / Added relative path feature. 00067 / Added f_chdir() and f_chdrive(). 00068 / Added proper case conversion to extended char. 00069 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h. 00070 / Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH. 00071 / Fixed name matching error on the 13 char boundary. 00072 / Added a configuration option, _LFN_UNICODE. 00073 / Changed f_readdir() to return the SFN with always upper case on non-LFN cfg. 00074 / 00075 / May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3) 00076 / Added file lock feature. (_FS_SHARE) 00077 / Added fast seek feature. (_USE_FASTSEEK) 00078 / Changed some types on the API, XCHAR->TCHAR. 00079 / Changed fname member in the FILINFO structure on Unicode cfg. 00080 / String functions support UTF-8 encoding files on Unicode cfg. 00081 / Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2) 00082 / Added sector erase feature. (_USE_ERASE) 00083 / Moved file lock semaphore table from fs object to the bss. 00084 / Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'. 00085 / Fixed f_mkfs() creates wrong FAT32 volume. 00086 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write(). 00087 / f_lseek() reports required table size on creating CLMP. 00088 / Extended format syntax of f_printf function. 00089 / Ignores duplicated directory separators in given path name. 00090 / 00091 / Sep 06,'11 R0.09 f_mkfs() supports multiple partition to finish the multiple partition feature. 00092 / Added f_fdisk(). (_MULTI_PARTITION = 2) 00093 / Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume. 00094 / Changed f_open() and f_opendir reject null object pointer to avoid crash. 00095 / Changed option name _FS_SHARE to _FS_LOCK. 00096 /---------------------------------------------------------------------------*/ 00097 00098 #include "ff.h" /* FatFs configurations and declarations */ 00099 #include "diskio.h" /* Declarations of low level disk I/O functions */ 00100 00101 00102 /*-------------------------------------------------------------------------- 00103 00104 Module Private Definitions 00105 00106 ---------------------------------------------------------------------------*/ 00107 00108 #if _FATFS != 4004 /* Revision ID */ 00109 #error Wrong include file (ff.h). 00110 #endif 00111 00112 00113 /* Definitions on sector size */ 00114 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096 00115 #error Wrong sector size. 00116 #endif 00117 #if _MAX_SS != 512 00118 #define SS(fs) ((fs)->ssize) /* Variable sector size */ 00119 #else 00120 #define SS(fs) 512U /* Fixed sector size */ 00121 #endif 00122 00123 00124 /* Reentrancy related */ 00125 #if _FS_REENTRANT 00126 #if _USE_LFN == 1 00127 #error Static LFN work area must not be used in re-entrant configuration. 00128 #endif 00129 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } 00130 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 00131 #else 00132 #define ENTER_FF(fs) 00133 #define LEAVE_FF(fs, res) return res 00134 #endif 00135 00136 #define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); } 00137 00138 00139 /* File access control feature */ 00140 #if _FS_LOCK 00141 #if _FS_READONLY 00142 #error _FS_LOCK must be 0 on read-only cfg. 00143 #endif 00144 typedef struct { 00145 FATFS *fs; /* File ID 1, volume (NULL:blank entry) */ 00146 DWORD clu; /* File ID 2, directory */ 00147 WORD idx; /* File ID 3, directory index */ 00148 WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */ 00149 } FILESEM; 00150 #endif 00151 00152 00153 00154 /* DBCS code ranges and SBCS extend char conversion table */ 00155 00156 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ 00157 #define _DF1S 0x81 /* DBC 1st byte range 1 start */ 00158 #define _DF1E 0x9F /* DBC 1st byte range 1 end */ 00159 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ 00160 #define _DF2E 0xFC /* DBC 1st byte range 2 end */ 00161 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ 00162 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ 00163 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ 00164 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ 00165 00166 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ 00167 #define _DF1S 0x81 00168 #define _DF1E 0xFE 00169 #define _DS1S 0x40 00170 #define _DS1E 0x7E 00171 #define _DS2S 0x80 00172 #define _DS2E 0xFE 00173 00174 #elif _CODE_PAGE == 949 /* Korean */ 00175 #define _DF1S 0x81 00176 #define _DF1E 0xFE 00177 #define _DS1S 0x41 00178 #define _DS1E 0x5A 00179 #define _DS2S 0x61 00180 #define _DS2E 0x7A 00181 #define _DS3S 0x81 00182 #define _DS3E 0xFE 00183 00184 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ 00185 #define _DF1S 0x81 00186 #define _DF1E 0xFE 00187 #define _DS1S 0x40 00188 #define _DS1E 0x7E 00189 #define _DS2S 0xA1 00190 #define _DS2E 0xFE 00191 00192 #elif _CODE_PAGE == 437 /* U.S. (OEM) */ 00193 #define _DF1S 0 00194 #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, \ 00195 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, \ 00196 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, \ 00197 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} 00198 00199 #elif _CODE_PAGE == 720 /* Arabic (OEM) */ 00200 #define _DF1S 0 00201 #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, \ 00202 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, \ 00203 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, \ 00204 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} 00205 00206 #elif _CODE_PAGE == 737 /* Greek (OEM) */ 00207 #define _DF1S 0 00208 #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, \ 00209 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, \ 00210 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, \ 00211 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} 00212 00213 #elif _CODE_PAGE == 775 /* Baltic (OEM) */ 00214 #define _DF1S 0 00215 #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, \ 00216 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, \ 00217 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, \ 00218 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} 00219 00220 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */ 00221 #define _DF1S 0 00222 #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, \ 00223 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, \ 00224 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, \ 00225 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} 00226 00227 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */ 00228 #define _DF1S 0 00229 #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, \ 00230 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, \ 00231 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, \ 00232 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} 00233 00234 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */ 00235 #define _DF1S 0 00236 #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, \ 00237 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, \ 00238 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, \ 00239 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} 00240 00241 #elif _CODE_PAGE == 857 /* Turkish (OEM) */ 00242 #define _DF1S 0 00243 #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, \ 00244 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, \ 00245 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, \ 00246 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} 00247 00248 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */ 00249 #define _DF1S 0 00250 #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, \ 00251 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, \ 00252 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, \ 00253 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} 00254 00255 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */ 00256 #define _DF1S 0 00257 #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, \ 00258 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, \ 00259 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, \ 00260 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} 00261 00262 #elif _CODE_PAGE == 866 /* Russian (OEM) */ 00263 #define _DF1S 0 00264 #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, \ 00265 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, \ 00266 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, \ 00267 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} 00268 00269 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */ 00270 #define _DF1S 0 00271 #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, \ 00272 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, \ 00273 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, \ 00274 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} 00275 00276 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */ 00277 #define _DF1S 0 00278 #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, \ 00279 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, \ 00280 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, \ 00281 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} 00282 00283 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */ 00284 #define _DF1S 0 00285 #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, \ 00286 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, \ 00287 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, \ 00288 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} 00289 00290 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */ 00291 #define _DF1S 0 00292 #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, \ 00293 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, \ 00294 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, \ 00295 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} 00296 00297 #elif _CODE_PAGE == 1253 /* Greek (Windows) */ 00298 #define _DF1S 0 00299 #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, \ 00300 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, \ 00301 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, \ 00302 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} 00303 00304 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */ 00305 #define _DF1S 0 00306 #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, \ 00307 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, \ 00308 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, \ 00309 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} 00310 00311 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */ 00312 #define _DF1S 0 00313 #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, \ 00314 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, \ 00315 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, \ 00316 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} 00317 00318 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */ 00319 #define _DF1S 0 00320 #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, \ 00321 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, \ 00322 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, \ 00323 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} 00324 00325 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */ 00326 #define _DF1S 0 00327 #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, \ 00328 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, \ 00329 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, \ 00330 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} 00331 00332 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */ 00333 #define _DF1S 0 00334 #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, \ 00335 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, \ 00336 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, \ 00337 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} 00338 00339 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ 00340 #if _USE_LFN 00341 #error Cannot use LFN feature without valid code page. 00342 #endif 00343 #define _DF1S 0 00344 00345 #else 00346 #error Unknown code page 00347 00348 #endif 00349 00350 00351 /* Character code support macros */ 00352 #define IsUpper(c) (((c)>='A')&&((c)<='Z')) 00353 #define IsLower(c) (((c)>='a')&&((c)<='z')) 00354 #define IsDigit(c) (((c)>='0')&&((c)<='9')) 00355 00356 #if _DF1S /* Code page is DBCS */ 00357 00358 #ifdef _DF2S /* Two 1st byte areas */ 00359 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) 00360 #else /* One 1st byte area */ 00361 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) 00362 #endif 00363 00364 #ifdef _DS3S /* Three 2nd byte areas */ 00365 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) 00366 #else /* Two 2nd byte areas */ 00367 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) 00368 #endif 00369 00370 #else /* Code page is SBCS */ 00371 00372 #define IsDBCS1(c) 0 00373 #define IsDBCS2(c) 0 00374 00375 #endif /* _DF1S */ 00376 00377 00378 /* Name status flags */ 00379 #define NS 11 /* Index of name status byte in fn[] */ 00380 #define NS_LOSS 0x01 /* Out of 8.3 format */ 00381 #define NS_LFN 0x02 /* Force to create LFN entry */ 00382 #define NS_LAST 0x04 /* Last segment */ 00383 #define NS_BODY 0x08 /* Lower case flag (body) */ 00384 #define NS_EXT 0x10 /* Lower case flag (ext) */ 00385 #define NS_DOT 0x20 /* Dot entry */ 00386 00387 00388 /* FAT sub-type boundaries */ 00389 /* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */ 00390 #define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */ 00391 #define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */ 00392 00393 00394 /* FatFs refers the members in the FAT structures as byte array instead of 00395 / structure member because the structure is not binary compatible between 00396 / different platforms */ 00397 00398 #define BS_jmpBoot 0 /* Jump instruction (3) */ 00399 #define BS_OEMName 3 /* OEM name (8) */ 00400 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ 00401 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ 00402 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ 00403 #define BPB_NumFATs 16 /* Number of FAT copies (1) */ 00404 #define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */ 00405 #define BPB_TotSec16 19 /* Volume size [sector] (2) */ 00406 #define BPB_Media 21 /* Media descriptor (1) */ 00407 #define BPB_FATSz16 22 /* FAT size [sector] (2) */ 00408 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */ 00409 #define BPB_NumHeads 26 /* Number of heads (2) */ 00410 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ 00411 #define BPB_TotSec32 32 /* Volume size [sector] (4) */ 00412 #define BS_DrvNum 36 /* Physical drive number (2) */ 00413 #define BS_BootSig 38 /* Extended boot signature (1) */ 00414 #define BS_VolID 39 /* Volume serial number (4) */ 00415 #define BS_VolLab 43 /* Volume label (8) */ 00416 #define BS_FilSysType 54 /* File system type (1) */ 00417 #define BPB_FATSz32 36 /* FAT size [sector] (4) */ 00418 #define BPB_ExtFlags 40 /* Extended flags (2) */ 00419 #define BPB_FSVer 42 /* File system version (2) */ 00420 #define BPB_RootClus 44 /* Root dir first cluster (4) */ 00421 #define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */ 00422 #define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */ 00423 #define BS_DrvNum32 64 /* Physical drive number (2) */ 00424 #define BS_BootSig32 66 /* Extended boot signature (1) */ 00425 #define BS_VolID32 67 /* Volume serial number (4) */ 00426 #define BS_VolLab32 71 /* Volume label (8) */ 00427 #define BS_FilSysType32 82 /* File system type (1) */ 00428 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */ 00429 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */ 00430 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ 00431 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ 00432 #define MBR_Table 446 /* MBR: Partition table offset (2) */ 00433 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 00434 #define BS_55AA 510 /* Boot sector signature (2) */ 00435 00436 #define DIR_Name 0 /* Short file name (11) */ 00437 #define DIR_Attr 11 /* Attribute (1) */ 00438 #define DIR_NTres 12 /* NT flag (1) */ 00439 #define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */ 00440 #define DIR_CrtTime 14 /* Created time (2) */ 00441 #define DIR_CrtDate 16 /* Created date (2) */ 00442 #define DIR_LstAccDate 18 /* Last accessed date (2) */ 00443 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ 00444 #define DIR_WrtTime 22 /* Modified time (2) */ 00445 #define DIR_WrtDate 24 /* Modified date (2) */ 00446 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ 00447 #define DIR_FileSize 28 /* File size (4) */ 00448 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ 00449 #define LDIR_Attr 11 /* LFN attribute (1) */ 00450 #define LDIR_Type 12 /* LFN type (1) */ 00451 #define LDIR_Chksum 13 /* Sum of corresponding SFN entry */ 00452 #define LDIR_FstClusLO 26 /* Filled by zero (0) */ 00453 #define SZ_DIR 32 /* Size of a directory entry */ 00454 #define LLE 0x40 /* Last long entry flag in LDIR_Ord */ 00455 #define DDE 0xE5 /* Deleted directory entry mark in DIR_Name[0] */ 00456 #define NDDE 0x05 /* Replacement of the character collides with DDE */ 00457 00458 00459 /*------------------------------------------------------------*/ 00460 /* Module private work area */ 00461 /*------------------------------------------------------------*/ 00462 /* Note that uninitialized variables with static duration are 00463 / zeroed/nulled at start-up. If not, the compiler or start-up 00464 / routine is out of ANSI-C standard. 00465 */ 00466 00467 #if _VOLUMES 00468 static 00469 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ 00470 #else 00471 #error Number of volumes must not be 0. 00472 #endif 00473 00474 static 00475 WORD Fsid; /* File system mount ID */ 00476 00477 #if _FS_RPATH 00478 static 00479 BYTE CurrVol; /* Current drive */ 00480 #endif 00481 00482 #if _FS_LOCK 00483 static 00484 FILESEM Files[_FS_LOCK]; /* File lock semaphores */ 00485 #endif 00486 00487 #if _USE_LFN == 0 /* No LFN feature */ 00488 #define DEF_NAMEBUF BYTE sfn[12] 00489 #define INIT_BUF(dobj) (dobj).fn = sfn 00490 #define FREE_BUF() 00491 00492 #elif _USE_LFN == 1 /* LFN feature with static working buffer */ 00493 static WCHAR LfnBuf[_MAX_LFN+1]; 00494 #define DEF_NAMEBUF BYTE sfn[12] 00495 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } 00496 #define FREE_BUF() 00497 00498 #elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */ 00499 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1] 00500 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; } 00501 #define FREE_BUF() 00502 00503 #elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */ 00504 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn 00505 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \ 00506 if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \ 00507 (dobj).lfn = lfn; (dobj).fn = sfn; } 00508 #define FREE_BUF() ff_memfree(lfn) 00509 00510 #else 00511 #error Wrong LFN configuration. 00512 #endif 00513 00514 00515 00516 00517 /*-------------------------------------------------------------------------- 00518 00519 Module Private Functions 00520 00521 ---------------------------------------------------------------------------*/ 00522 00523 00524 /*-----------------------------------------------------------------------*/ 00525 /* String functions */ 00526 /*-----------------------------------------------------------------------*/ 00527 00528 /* Copy memory to memory */ 00529 static 00530 void mem_cpy (void* dst, const void* src, UINT cnt) 00531 { 00532 BYTE *d = (BYTE*)dst; 00533 const BYTE *s = (const BYTE*)src; 00534 00535 #if _WORD_ACCESS == 1 00536 while (cnt >= sizeof (int)) { 00537 *(int*)d = *(int*)s; 00538 d += sizeof (int); 00539 s += sizeof (int); 00540 cnt -= sizeof (int); 00541 } 00542 #endif 00543 while (cnt--) 00544 *d++ = *s++; 00545 } 00546 00547 /* Fill memory */ 00548 static 00549 void mem_set (void* dst, int val, UINT cnt) 00550 { 00551 BYTE *d = (BYTE*)dst; 00552 00553 while (cnt--) 00554 *d++ = (BYTE)val; 00555 } 00556 00557 /* Compare memory to memory */ 00558 static 00559 int mem_cmp (const void* dst, const void* src, UINT cnt) 00560 { 00561 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 00562 int r = 0; 00563 00564 while (cnt-- && (r = *d++ - *s++) == 0) ; 00565 return r; 00566 } 00567 00568 /* Check if chr is contained in the string */ 00569 static 00570 int chk_chr (const char* str, int chr) 00571 { 00572 while (*str && *str != chr) str++; 00573 return *str; 00574 } 00575 00576 00577 00578 /*-----------------------------------------------------------------------*/ 00579 /* Request/Release grant to access the volume */ 00580 /*-----------------------------------------------------------------------*/ 00581 #if _FS_REENTRANT 00582 00583 static 00584 int lock_fs ( 00585 FATFS *fs /* File system object */ 00586 ) 00587 { 00588 return ff_req_grant(fs->sobj); 00589 } 00590 00591 00592 static 00593 void unlock_fs ( 00594 FATFS *fs, /* File system object */ 00595 FRESULT res /* Result code to be returned */ 00596 ) 00597 { 00598 if (fs && 00599 res != FR_NOT_ENABLED && 00600 res != FR_INVALID_DRIVE && 00601 res != FR_INVALID_OBJECT && 00602 res != FR_TIMEOUT) { 00603 ff_rel_grant(fs->sobj); 00604 } 00605 } 00606 #endif 00607 00608 00609 00610 /*-----------------------------------------------------------------------*/ 00611 /* File lock control functions */ 00612 /*-----------------------------------------------------------------------*/ 00613 #if _FS_LOCK 00614 00615 static 00616 FRESULT chk_lock ( /* Check if the file can be accessed */ 00617 DIR* dj, /* Directory object pointing the file to be checked */ 00618 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 00619 ) 00620 { 00621 UINT i, be; 00622 00623 /* Search file semaphore table */ 00624 for (i = be = 0; i < _FS_LOCK; i++) { 00625 if (Files[i].fs) { /* Existing entry */ 00626 if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */ 00627 Files[i].clu == dj->sclust && 00628 Files[i].idx == dj->index) break; 00629 } else { /* Blank entry */ 00630 be++; 00631 } 00632 } 00633 if (i == _FS_LOCK) /* The file is not opened */ 00634 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */ 00635 00636 /* The file has been opened. Reject any open against writing file and all write mode open */ 00637 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 00638 } 00639 00640 00641 static 00642 int enq_lock (void) /* Check if an entry is available for a new file */ 00643 { 00644 UINT i; 00645 00646 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 00647 return (i == _FS_LOCK) ? 0 : 1; 00648 } 00649 00650 00651 static 00652 UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */ 00653 DIR* dj, /* Directory object pointing the file to register or increment */ 00654 int acc /* Desired access mode (0:Read, !0:Write) */ 00655 ) 00656 { 00657 UINT i; 00658 00659 00660 for (i = 0; i < _FS_LOCK; i++) { /* Find the file */ 00661 if (Files[i].fs == dj->fs && 00662 Files[i].clu == dj->sclust && 00663 Files[i].idx == dj->index) break; 00664 } 00665 00666 if (i == _FS_LOCK) { /* Not opened. Register it as new. */ 00667 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 00668 if (i == _FS_LOCK) return 0; /* No space to register (int err) */ 00669 Files[i].fs = dj->fs; 00670 Files[i].clu = dj->sclust; 00671 Files[i].idx = dj->index; 00672 Files[i].ctr = 0; 00673 } 00674 00675 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ 00676 00677 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 00678 00679 return i + 1; 00680 } 00681 00682 00683 static 00684 FRESULT dec_lock ( /* Decrement file open counter */ 00685 UINT i /* Semaphore index */ 00686 ) 00687 { 00688 WORD n; 00689 FRESULT res; 00690 00691 00692 if (--i < _FS_LOCK) { 00693 n = Files[i].ctr; 00694 if (n == 0x100) n = 0; 00695 if (n) n--; 00696 Files[i].ctr = n; 00697 if (!n) Files[i].fs = 0; 00698 res = FR_OK; 00699 } else { 00700 res = FR_INT_ERR; 00701 } 00702 return res; 00703 } 00704 00705 00706 static 00707 void clear_lock ( /* Clear lock entries of the volume */ 00708 FATFS *fs 00709 ) 00710 { 00711 UINT i; 00712 00713 for (i = 0; i < _FS_LOCK; i++) { 00714 if (Files[i].fs == fs) Files[i].fs = 0; 00715 } 00716 } 00717 #endif 00718 00719 00720 00721 /*-----------------------------------------------------------------------*/ 00722 /* Change window offset */ 00723 /*-----------------------------------------------------------------------*/ 00724 00725 static 00726 FRESULT move_window ( 00727 FATFS *fs, /* File system object */ 00728 DWORD sector /* Sector number to make appearance in the fs->win[] */ 00729 ) /* Move to zero only writes back dirty window */ 00730 { 00731 DWORD wsect; 00732 00733 00734 wsect = fs->winsect; 00735 if (wsect != sector) { /* Changed current window */ 00736 #if !_FS_READONLY 00737 if (fs->wflag) { /* Write back dirty window if needed */ 00738 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) 00739 return FR_DISK_ERR; 00740 fs->wflag = 0; 00741 if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */ 00742 BYTE nf; 00743 for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */ 00744 wsect += fs->fsize; 00745 disk_write(fs->drv, fs->win, wsect, 1); 00746 } 00747 } 00748 } 00749 #endif 00750 if (sector) { 00751 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) 00752 return FR_DISK_ERR; 00753 fs->winsect = sector; 00754 } 00755 } 00756 00757 return FR_OK; 00758 } 00759 00760 00761 00762 00763 /*-----------------------------------------------------------------------*/ 00764 /* Clean-up cached data */ 00765 /*-----------------------------------------------------------------------*/ 00766 #if !_FS_READONLY 00767 static 00768 FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */ 00769 FATFS *fs /* File system object */ 00770 ) 00771 { 00772 FRESULT res; 00773 00774 00775 res = move_window(fs, 0); 00776 if (res == FR_OK) { 00777 /* Update FSInfo sector if needed */ 00778 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) { 00779 fs->winsect = 0; 00780 /* Create FSInfo structure */ 00781 mem_set(fs->win, 0, 512); 00782 ST_WORD(fs->win+BS_55AA, 0xAA55); 00783 ST_DWORD(fs->win+FSI_LeadSig, 0x41615252); 00784 ST_DWORD(fs->win+FSI_StrucSig, 0x61417272); 00785 ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust); 00786 ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust); 00787 /* Write it into the FSInfo sector */ 00788 disk_write(fs->drv, fs->win, fs->fsi_sector, 1); 00789 fs->fsi_flag = 0; 00790 } 00791 /* Make sure that no pending write process in the physical drive */ 00792 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) 00793 res = FR_DISK_ERR; 00794 } 00795 00796 return res; 00797 } 00798 #endif 00799 00800 00801 00802 00803 /*-----------------------------------------------------------------------*/ 00804 /* Get sector# from cluster# */ 00805 /*-----------------------------------------------------------------------*/ 00806 00807 00808 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ 00809 FATFS *fs, /* File system object */ 00810 DWORD clst /* Cluster# to be converted */ 00811 ) 00812 { 00813 clst -= 2; 00814 if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ 00815 return clst * fs->csize + fs->database; 00816 } 00817 00818 00819 00820 00821 /*-----------------------------------------------------------------------*/ 00822 /* FAT access - Read value of a FAT entry */ 00823 /*-----------------------------------------------------------------------*/ 00824 00825 00826 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */ 00827 FATFS *fs, /* File system object */ 00828 DWORD clst /* Cluster# to get the link information */ 00829 ) 00830 { 00831 UINT wc, bc; 00832 BYTE *p; 00833 00834 00835 if (clst < 2 || clst >= fs->n_fatent) /* Check range */ 00836 return 1; 00837 00838 switch (fs->fs_type) { 00839 case FS_FAT12 : 00840 bc = (UINT)clst; 00841 bc += bc / 2; 00842 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; 00843 wc = fs->win[bc % SS(fs)]; 00844 bc++; 00845 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; 00846 wc |= fs->win[bc % SS(fs)] << 8; 00847 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); 00848 00849 case FS_FAT16 : 00850 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break; 00851 p = &fs->win[clst * 2 % SS(fs)]; 00852 return LD_WORD(p); 00853 00854 case FS_FAT32 : 00855 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break; 00856 p = &fs->win[clst * 4 % SS(fs)]; 00857 return LD_DWORD(p) & 0x0FFFFFFF; 00858 } 00859 00860 return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */ 00861 } 00862 00863 00864 00865 00866 /*-----------------------------------------------------------------------*/ 00867 /* FAT access - Change value of a FAT entry */ 00868 /*-----------------------------------------------------------------------*/ 00869 #if !_FS_READONLY 00870 00871 FRESULT put_fat ( 00872 FATFS *fs, /* File system object */ 00873 DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */ 00874 DWORD val /* New value to mark the cluster */ 00875 ) 00876 { 00877 UINT bc; 00878 BYTE *p; 00879 FRESULT res; 00880 00881 00882 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ 00883 res = FR_INT_ERR; 00884 00885 } else { 00886 switch (fs->fs_type) { 00887 case FS_FAT12 : 00888 bc = (UINT)clst; 00889 bc += bc / 2; 00890 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00891 if (res != FR_OK) break; 00892 p = &fs->win[bc % SS(fs)]; 00893 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; 00894 bc++; 00895 fs->wflag = 1; 00896 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00897 if (res != FR_OK) break; 00898 p = &fs->win[bc % SS(fs)]; 00899 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); 00900 break; 00901 00902 case FS_FAT16 : 00903 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 00904 if (res != FR_OK) break; 00905 p = &fs->win[clst * 2 % SS(fs)]; 00906 ST_WORD(p, (WORD)val); 00907 break; 00908 00909 case FS_FAT32 : 00910 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 00911 if (res != FR_OK) break; 00912 p = &fs->win[clst * 4 % SS(fs)]; 00913 val |= LD_DWORD(p) & 0xF0000000; 00914 ST_DWORD(p, val); 00915 break; 00916 00917 default : 00918 res = FR_INT_ERR; 00919 } 00920 fs->wflag = 1; 00921 } 00922 00923 return res; 00924 } 00925 #endif /* !_FS_READONLY */ 00926 00927 00928 00929 00930 /*-----------------------------------------------------------------------*/ 00931 /* FAT handling - Remove a cluster chain */ 00932 /*-----------------------------------------------------------------------*/ 00933 #if !_FS_READONLY 00934 static 00935 FRESULT remove_chain ( 00936 FATFS *fs, /* File system object */ 00937 DWORD clst /* Cluster# to remove a chain from */ 00938 ) 00939 { 00940 FRESULT res; 00941 DWORD nxt; 00942 #if _USE_ERASE 00943 DWORD scl = clst, ecl = clst, rt[2]; 00944 #endif 00945 00946 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ 00947 res = FR_INT_ERR; 00948 00949 } else { 00950 res = FR_OK; 00951 while (clst < fs->n_fatent) { /* Not a last link? */ 00952 nxt = get_fat(fs, clst); /* Get cluster status */ 00953 if (nxt == 0) break; /* Empty cluster? */ 00954 if (nxt == 1) { 00955 res = FR_INT_ERR; /* Internal error? */ 00956 break; 00957 } 00958 if (nxt == 0xFFFFFFFF) { 00959 res = FR_DISK_ERR; /* Disk error? */ 00960 break; 00961 } 00962 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ 00963 if (res != FR_OK) break; 00964 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */ 00965 fs->free_clust++; 00966 fs->fsi_flag = 1; 00967 } 00968 #if _USE_ERASE 00969 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ 00970 ecl = nxt; 00971 } else { /* End of contiguous clusters */ 00972 rt[0] = clust2sect(fs, scl); /* Start sector */ 00973 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ 00974 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt); /* Erase the block */ 00975 scl = ecl = nxt; 00976 } 00977 #endif 00978 clst = nxt; /* Next cluster */ 00979 } 00980 } 00981 00982 return res; 00983 } 00984 #endif 00985 00986 00987 00988 00989 /*-----------------------------------------------------------------------*/ 00990 /* FAT handling - Stretch or Create a cluster chain */ 00991 /*-----------------------------------------------------------------------*/ 00992 #if !_FS_READONLY 00993 static 00994 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 00995 FATFS *fs, /* File system object */ 00996 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */ 00997 ) 00998 { 00999 DWORD cs, ncl, scl; 01000 FRESULT res; 01001 01002 01003 if (clst == 0) { /* Create a new chain */ 01004 scl = fs->last_clust; /* Get suggested start point */ 01005 if (!scl || scl >= fs->n_fatent) scl = 1; 01006 } else { /* Stretch the current chain */ 01007 cs = get_fat(fs, clst); /* Check the cluster status */ 01008 if (cs < 2) return 1; /* It is an invalid cluster */ 01009 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 01010 scl = clst; 01011 } 01012 01013 ncl = scl; /* Start cluster */ 01014 for (;;) { 01015 ncl++; /* Next cluster */ 01016 if (ncl >= fs->n_fatent) { /* Wrap around */ 01017 ncl = 2; 01018 if (ncl > scl) return 0; /* No free cluster */ 01019 } 01020 cs = get_fat(fs, ncl); /* Get the cluster status */ 01021 if (cs == 0) break; /* Found a free cluster */ 01022 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ 01023 return cs; 01024 if (ncl == scl) return 0; /* No free cluster */ 01025 } 01026 01027 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ 01028 if (res == FR_OK && clst != 0) { 01029 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ 01030 } 01031 if (res == FR_OK) { 01032 fs->last_clust = ncl; /* Update FSINFO */ 01033 if (fs->free_clust != 0xFFFFFFFF) { 01034 fs->free_clust--; 01035 fs->fsi_flag = 1; 01036 } 01037 } else { 01038 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; 01039 } 01040 01041 return ncl; /* Return new cluster number or error code */ 01042 } 01043 #endif /* !_FS_READONLY */ 01044 01045 01046 01047 /*-----------------------------------------------------------------------*/ 01048 /* FAT handling - Convert offset into cluster with link map table */ 01049 /*-----------------------------------------------------------------------*/ 01050 01051 #if _USE_FASTSEEK 01052 static 01053 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 01054 FIL* fp, /* Pointer to the file object */ 01055 DWORD ofs /* File offset to be converted to cluster# */ 01056 ) 01057 { 01058 DWORD cl, ncl, *tbl; 01059 01060 01061 tbl = fp->cltbl + 1; /* Top of CLMT */ 01062 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ 01063 for (;;) { 01064 ncl = *tbl++; /* Number of cluters in the fragment */ 01065 if (!ncl) return 0; /* End of table? (error) */ 01066 if (cl < ncl) break; /* In this fragment? */ 01067 cl -= ncl; 01068 tbl++; /* Next fragment */ 01069 } 01070 return cl + *tbl; /* Return the cluster number */ 01071 } 01072 #endif /* _USE_FASTSEEK */ 01073 01074 01075 01076 /*-----------------------------------------------------------------------*/ 01077 /* Directory handling - Set directory index */ 01078 /*-----------------------------------------------------------------------*/ 01079 01080 static 01081 FRESULT dir_sdi ( 01082 FATFS_DIR *dj, /* Pointer to directory object */ 01083 WORD idx /* Index of directory table */ 01084 ) 01085 { 01086 DWORD clst; 01087 WORD ic; 01088 01089 01090 dj->index = idx; 01091 clst = dj->sclust; 01092 if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */ 01093 return FR_INT_ERR; 01094 if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ 01095 clst = dj->fs->dirbase; 01096 01097 if (clst == 0) { /* Static table (root-dir in FAT12/16) */ 01098 dj->clust = clst; 01099 if (idx >= dj->fs->n_rootdir) /* Index is out of range */ 01100 return FR_INT_ERR; 01101 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ 01102 } else { /* Dynamic table (sub-dirs or root-dir in FAT32) */ 01103 ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */ 01104 while (idx >= ic) { /* Follow cluster chain */ 01105 clst = get_fat(dj->fs, clst); /* Get next cluster */ 01106 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01107 if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */ 01108 return FR_INT_ERR; 01109 idx -= ic; 01110 } 01111 dj->clust = clst; 01112 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ 01113 } 01114 01115 dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */ 01116 01117 return FR_OK; /* Seek succeeded */ 01118 } 01119 01120 01121 01122 01123 /*-----------------------------------------------------------------------*/ 01124 /* Directory handling - Move directory table index next */ 01125 /*-----------------------------------------------------------------------*/ 01126 01127 static 01128 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */ 01129 FATFS_DIR *dj, /* Pointer to directory object */ 01130 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 01131 ) 01132 { 01133 DWORD clst; 01134 WORD i; 01135 01136 01137 stretch = stretch; /* To suppress warning on read-only cfg. */ 01138 i = dj->index + 1; 01139 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ 01140 return FR_NO_FILE; 01141 01142 if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */ 01143 dj->sect++; /* Next sector */ 01144 01145 if (dj->clust == 0) { /* Static table */ 01146 if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */ 01147 return FR_NO_FILE; 01148 } else { /* Dynamic table */ 01149 if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */ 01150 clst = get_fat(dj->fs, dj->clust); /* Get next cluster */ 01151 if (clst <= 1) return FR_INT_ERR; 01152 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01153 if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */ 01154 #if !_FS_READONLY 01155 BYTE c; 01156 if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */ 01157 clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */ 01158 if (clst == 0) return FR_DENIED; /* No free cluster */ 01159 if (clst == 1) return FR_INT_ERR; 01160 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01161 /* Clean-up stretched table */ 01162 if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */ 01163 mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */ 01164 dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */ 01165 for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */ 01166 dj->fs->wflag = 1; 01167 if (move_window(dj->fs, 0)) return FR_DISK_ERR; 01168 dj->fs->winsect++; 01169 } 01170 dj->fs->winsect -= c; /* Rewind window address */ 01171 #else 01172 return FR_NO_FILE; /* Report EOT */ 01173 #endif 01174 } 01175 dj->clust = clst; /* Initialize data for new cluster */ 01176 dj->sect = clust2sect(dj->fs, clst); 01177 } 01178 } 01179 } 01180 01181 dj->index = i; 01182 dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; 01183 01184 return FR_OK; 01185 } 01186 01187 01188 01189 01190 /*-----------------------------------------------------------------------*/ 01191 /* Directory handling - Load/Store start cluster number */ 01192 /*-----------------------------------------------------------------------*/ 01193 01194 static 01195 DWORD ld_clust ( 01196 FATFS *fs, /* Pointer to the fs object */ 01197 BYTE *dir /* Pointer to the directory entry */ 01198 ) 01199 { 01200 DWORD cl; 01201 01202 cl = LD_WORD(dir+DIR_FstClusLO); 01203 if (fs->fs_type == FS_FAT32) 01204 cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16; 01205 01206 return cl; 01207 } 01208 01209 01210 #if !_FS_READONLY 01211 static 01212 void st_clust ( 01213 BYTE *dir, /* Pointer to the directory entry */ 01214 DWORD cl /* Value to be set */ 01215 ) 01216 { 01217 ST_WORD(dir+DIR_FstClusLO, cl); 01218 ST_WORD(dir+DIR_FstClusHI, cl >> 16); 01219 } 01220 #endif 01221 01222 01223 01224 /*-----------------------------------------------------------------------*/ 01225 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ 01226 /*-----------------------------------------------------------------------*/ 01227 #if _USE_LFN 01228 static 01229 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */ 01230 01231 01232 static 01233 int cmp_lfn ( /* 1:Matched, 0:Not matched */ 01234 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */ 01235 BYTE *dir /* Pointer to the directory entry containing a part of LFN */ 01236 ) 01237 { 01238 UINT i, s; 01239 WCHAR wc, uc; 01240 01241 01242 i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */ 01243 s = 0; 01244 wc = 1; 01245 do { 01246 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 01247 if (wc) { /* Last char has not been processed */ 01248 wc = ff_wtoupper(uc); /* Convert it to upper case */ 01249 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */ 01250 return 0; /* Not matched */ 01251 } else { 01252 if (uc != 0xFFFF) return 0; /* Check filler */ 01253 } 01254 } while (++s < 13); /* Repeat until all chars in the entry are checked */ 01255 01256 if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */ 01257 return 0; 01258 01259 return 1; /* The part of LFN matched */ 01260 } 01261 01262 01263 01264 static 01265 int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */ 01266 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */ 01267 BYTE *dir /* Pointer to the directory entry */ 01268 ) 01269 { 01270 UINT i, s; 01271 WCHAR wc, uc; 01272 01273 01274 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 01275 01276 s = 0; 01277 wc = 1; 01278 do { 01279 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 01280 if (wc) { /* Last char has not been processed */ 01281 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01282 lfnbuf[i++] = wc = uc; /* Store it */ 01283 } else { 01284 if (uc != 0xFFFF) return 0; /* Check filler */ 01285 } 01286 } while (++s < 13); /* Read all character in the entry */ 01287 01288 if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */ 01289 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01290 lfnbuf[i] = 0; 01291 } 01292 01293 return 1; 01294 } 01295 01296 01297 #if !_FS_READONLY 01298 static 01299 void fit_lfn ( 01300 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */ 01301 BYTE *dir, /* Pointer to the directory entry */ 01302 BYTE ord, /* LFN order (1-20) */ 01303 BYTE sum /* SFN sum */ 01304 ) 01305 { 01306 UINT i, s; 01307 WCHAR wc; 01308 01309 01310 dir[LDIR_Chksum] = sum; /* Set check sum */ 01311 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 01312 dir[LDIR_Type] = 0; 01313 ST_WORD(dir+LDIR_FstClusLO, 0); 01314 01315 i = (ord - 1) * 13; /* Get offset in the LFN buffer */ 01316 s = wc = 0; 01317 do { 01318 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */ 01319 ST_WORD(dir+LfnOfs[s], wc); /* Put it */ 01320 if (!wc) wc = 0xFFFF; /* Padding chars following last char */ 01321 } while (++s < 13); 01322 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */ 01323 dir[LDIR_Ord] = ord; /* Set the LFN order */ 01324 } 01325 01326 #endif 01327 #endif 01328 01329 01330 01331 /*-----------------------------------------------------------------------*/ 01332 /* Create numbered name */ 01333 /*-----------------------------------------------------------------------*/ 01334 #if _USE_LFN 01335 void gen_numname ( 01336 BYTE *dst, /* Pointer to generated SFN */ 01337 const BYTE *src, /* Pointer to source SFN to be modified */ 01338 const WCHAR *lfn, /* Pointer to LFN */ 01339 WORD seq /* Sequence number */ 01340 ) 01341 { 01342 BYTE ns[8], c; 01343 UINT i, j; 01344 01345 01346 mem_cpy(dst, src, 11); 01347 01348 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ 01349 do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; 01350 while (*lfn); 01351 } 01352 01353 /* itoa (hexdecimal) */ 01354 i = 7; 01355 do { 01356 c = (seq % 16) + '0'; 01357 if (c > '9') c += 7; 01358 ns[i--] = c; 01359 seq /= 16; 01360 } while (seq); 01361 ns[i] = '~'; 01362 01363 /* Append the number */ 01364 for (j = 0; j < i && dst[j] != ' '; j++) { 01365 if (IsDBCS1(dst[j])) { 01366 if (j == i - 1) break; 01367 j++; 01368 } 01369 } 01370 do { 01371 dst[j++] = (i < 8) ? ns[i++] : ' '; 01372 } while (j < 8); 01373 } 01374 #endif 01375 01376 01377 01378 01379 /*-----------------------------------------------------------------------*/ 01380 /* Calculate sum of an SFN */ 01381 /*-----------------------------------------------------------------------*/ 01382 #if _USE_LFN 01383 static 01384 BYTE sum_sfn ( 01385 const BYTE *dir /* Ptr to directory entry */ 01386 ) 01387 { 01388 BYTE sum = 0; 01389 UINT n = 11; 01390 01391 do sum = (sum >> 1) + (sum << 7) + *dir++; 01392 while (--n); 01393 return sum; 01394 } 01395 #endif 01396 01397 01398 01399 01400 /*-----------------------------------------------------------------------*/ 01401 /* Directory handling - Find an object in the directory */ 01402 /*-----------------------------------------------------------------------*/ 01403 01404 static 01405 FRESULT dir_find ( 01406 FATFS_DIR *dj /* Pointer to the directory object linked to the file name */ 01407 ) 01408 { 01409 FRESULT res; 01410 BYTE c, *dir; 01411 #if _USE_LFN 01412 BYTE a, ord, sum; 01413 #endif 01414 01415 res = dir_sdi(dj, 0); /* Rewind directory object */ 01416 if (res != FR_OK) return res; 01417 01418 #if _USE_LFN 01419 ord = sum = 0xFF; 01420 #endif 01421 do { 01422 res = move_window(dj->fs, dj->sect); 01423 if (res != FR_OK) break; 01424 dir = dj->dir; /* Ptr to the directory entry of current index */ 01425 c = dir[DIR_Name]; 01426 if (c == 0) { 01427 res = FR_NO_FILE; /* Reached to end of table */ 01428 break; 01429 } 01430 #if _USE_LFN /* LFN configuration */ 01431 a = dir[DIR_Attr] & AM_MASK; 01432 if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 01433 ord = 0xFF; 01434 } else { 01435 if (a == AM_LFN) { /* An LFN entry is found */ 01436 if (dj->lfn) { 01437 if (c & LLE) { /* Is it start of LFN sequence? */ 01438 sum = dir[LDIR_Chksum]; 01439 c &= ~LLE; 01440 ord = c; /* LFN start order */ 01441 dj->lfn_idx = dj->index; 01442 } 01443 /* Check validity of the LFN entry and compare it with given name */ 01444 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; 01445 } 01446 } else { /* An SFN entry is found */ 01447 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ 01448 ord = 0xFF; 01449 dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 01450 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */ 01451 } 01452 } 01453 #else /* Non LFN configuration */ 01454 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ 01455 break; 01456 #endif 01457 res = dir_next(dj, 0); /* Next entry */ 01458 } while (res == FR_OK); 01459 01460 return res; 01461 } 01462 01463 01464 01465 01466 /*-----------------------------------------------------------------------*/ 01467 /* Read an object from the directory */ 01468 /*-----------------------------------------------------------------------*/ 01469 #if _FS_MINIMIZE <= 1 01470 static 01471 FRESULT dir_read ( 01472 FATFS_DIR *dj /* Pointer to the directory object that pointing the entry to be read */ 01473 ) 01474 { 01475 FRESULT res; 01476 BYTE c, *dir; 01477 #if _USE_LFN 01478 BYTE a, ord = 0xFF, sum = 0xFF; 01479 #endif 01480 01481 res = FR_NO_FILE; 01482 while (dj->sect) { 01483 res = move_window(dj->fs, dj->sect); 01484 if (res != FR_OK) break; 01485 dir = dj->dir; /* Ptr to the directory entry of current index */ 01486 c = dir[DIR_Name]; 01487 if (c == 0) { 01488 res = FR_NO_FILE; /* Reached to end of table */ 01489 break; 01490 } 01491 #if _USE_LFN /* LFN configuration */ 01492 a = dir[DIR_Attr] & AM_MASK; 01493 if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 01494 ord = 0xFF; 01495 } else { 01496 if (a == AM_LFN) { /* An LFN entry is found */ 01497 if (c & LLE) { /* Is it start of LFN sequence? */ 01498 sum = dir[LDIR_Chksum]; 01499 c &= ~LLE; 01500 ord = c; 01501 dj->lfn_idx = dj->index; 01502 } 01503 /* Check LFN validity and capture it */ 01504 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; 01505 } else { /* An SFN entry is found */ 01506 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ 01507 dj->lfn_idx = 0xFFFF; /* It has no LFN. */ 01508 break; 01509 } 01510 } 01511 #else /* Non LFN configuration */ 01512 if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */ 01513 break; 01514 #endif 01515 res = dir_next(dj, 0); /* Next entry */ 01516 if (res != FR_OK) break; 01517 } 01518 01519 if (res != FR_OK) dj->sect = 0; 01520 01521 return res; 01522 } 01523 #endif 01524 01525 01526 01527 /*-----------------------------------------------------------------------*/ 01528 /* Register an object to the directory */ 01529 /*-----------------------------------------------------------------------*/ 01530 #if !_FS_READONLY 01531 static 01532 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */ 01533 FATFS_DIR *dj /* Target directory with object name to be created */ 01534 ) 01535 { 01536 FRESULT res; 01537 BYTE c, *dir; 01538 #if _USE_LFN /* LFN configuration */ 01539 WORD n, ne, is; 01540 BYTE sn[12], *fn, sum; 01541 WCHAR *lfn; 01542 01543 01544 fn = dj->fn; 01545 lfn = dj->lfn; 01546 mem_cpy(sn, fn, 12); 01547 01548 if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */ 01549 return FR_INVALID_NAME; 01550 01551 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 01552 fn[NS] = 0; 01553 dj->lfn = 0; /* Find only SFN */ 01554 for (n = 1; n < 100; n++) { 01555 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ 01556 res = dir_find(dj); /* Check if the name collides with existing SFN */ 01557 if (res != FR_OK) break; 01558 } 01559 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 01560 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 01561 fn[NS] = sn[NS]; 01562 dj->lfn = lfn; 01563 } 01564 01565 if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */ 01566 for (ne = 0; lfn[ne]; ne++) ; 01567 ne = (ne + 25) / 13; 01568 } else { /* Otherwise reserve only an SFN entry. */ 01569 ne = 1; 01570 } 01571 01572 /* Reserve contiguous entries */ 01573 res = dir_sdi(dj, 0); 01574 if (res != FR_OK) return res; 01575 n = is = 0; 01576 do { 01577 res = move_window(dj->fs, dj->sect); 01578 if (res != FR_OK) break; 01579 c = *dj->dir; /* Check the entry status */ 01580 if (c == DDE || c == 0) { /* Is it a blank entry? */ 01581 if (n == 0) is = dj->index; /* First index of the contiguous entry */ 01582 if (++n == ne) break; /* A contiguous entry that required count is found */ 01583 } else { 01584 n = 0; /* Not a blank entry. Restart to search */ 01585 } 01586 res = dir_next(dj, 1); /* Next entry with table stretch */ 01587 } while (res == FR_OK); 01588 01589 if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */ 01590 res = dir_sdi(dj, is); 01591 if (res == FR_OK) { 01592 sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */ 01593 ne--; 01594 do { /* Store LFN entries in bottom first */ 01595 res = move_window(dj->fs, dj->sect); 01596 if (res != FR_OK) break; 01597 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum); 01598 dj->fs->wflag = 1; 01599 res = dir_next(dj, 0); /* Next entry */ 01600 } while (res == FR_OK && --ne); 01601 } 01602 } 01603 01604 #else /* Non LFN configuration */ 01605 res = dir_sdi(dj, 0); 01606 if (res == FR_OK) { 01607 do { /* Find a blank entry for the SFN */ 01608 res = move_window(dj->fs, dj->sect); 01609 if (res != FR_OK) break; 01610 c = *dj->dir; 01611 if (c == DDE || c == 0) break; /* Is it a blank entry? */ 01612 res = dir_next(dj, 1); /* Next entry with table stretch */ 01613 } while (res == FR_OK); 01614 } 01615 #endif 01616 01617 if (res == FR_OK) { /* Initialize the SFN entry */ 01618 res = move_window(dj->fs, dj->sect); 01619 if (res == FR_OK) { 01620 dir = dj->dir; 01621 mem_set(dir, 0, SZ_DIR); /* Clean the entry */ 01622 mem_cpy(dir, dj->fn, 11); /* Put SFN */ 01623 #if _USE_LFN 01624 dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */ 01625 #endif 01626 dj->fs->wflag = 1; 01627 } 01628 } 01629 01630 return res; 01631 } 01632 #endif /* !_FS_READONLY */ 01633 01634 01635 01636 01637 /*-----------------------------------------------------------------------*/ 01638 /* Remove an object from the directory */ 01639 /*-----------------------------------------------------------------------*/ 01640 #if !_FS_READONLY && !_FS_MINIMIZE 01641 static 01642 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */ 01643 FATFS_DIR *dj /* Directory object pointing the entry to be removed */ 01644 ) 01645 { 01646 FRESULT res; 01647 #if _USE_LFN /* LFN configuration */ 01648 WORD i; 01649 01650 i = dj->index; /* SFN index */ 01651 res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */ 01652 if (res == FR_OK) { 01653 do { 01654 res = move_window(dj->fs, dj->sect); 01655 if (res != FR_OK) break; 01656 *dj->dir = DDE; /* Mark the entry "deleted" */ 01657 dj->fs->wflag = 1; 01658 if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ 01659 res = dir_next(dj, 0); /* Next entry */ 01660 } while (res == FR_OK); 01661 if (res == FR_NO_FILE) res = FR_INT_ERR; 01662 } 01663 01664 #else /* Non LFN configuration */ 01665 res = dir_sdi(dj, dj->index); 01666 if (res == FR_OK) { 01667 res = move_window(dj->fs, dj->sect); 01668 if (res == FR_OK) { 01669 *dj->dir = DDE; /* Mark the entry "deleted" */ 01670 dj->fs->wflag = 1; 01671 } 01672 } 01673 #endif 01674 01675 return res; 01676 } 01677 #endif /* !_FS_READONLY */ 01678 01679 01680 01681 01682 /*-----------------------------------------------------------------------*/ 01683 /* Pick a segment and create the object name in directory form */ 01684 /*-----------------------------------------------------------------------*/ 01685 01686 static 01687 FRESULT create_name ( 01688 FATFS_DIR *dj, /* Pointer to the directory object */ 01689 const TCHAR **path /* Pointer to pointer to the segment in the path string */ 01690 ) 01691 { 01692 #ifdef _EXCVT 01693 static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */ 01694 #endif 01695 01696 #if _USE_LFN /* LFN configuration */ 01697 BYTE b, cf; 01698 WCHAR w, *lfn; 01699 UINT i, ni, si, di; 01700 const TCHAR *p; 01701 01702 /* Create LFN in Unicode */ 01703 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01704 lfn = dj->lfn; 01705 si = di = 0; 01706 for (;;) { 01707 w = p[si++]; /* Get a character */ 01708 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ 01709 if (di >= _MAX_LFN) /* Reject too long name */ 01710 return FR_INVALID_NAME; 01711 #if !_LFN_UNICODE 01712 w &= 0xFF; 01713 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01714 b = (BYTE)p[si++]; /* Get 2nd byte */ 01715 if (!IsDBCS2(b)) 01716 return FR_INVALID_NAME; /* Reject invalid sequence */ 01717 else 01718 w = (w << 8) + b; /* Create a DBC */ 01719 } 01720 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ 01721 if (!w) return FR_INVALID_NAME; /* Reject invalid code */ 01722 #endif 01723 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */ 01724 return FR_INVALID_NAME; 01725 lfn[di++] = w; /* Store the Unicode char */ 01726 } 01727 *path = &p[si]; /* Return pointer to the next segment */ 01728 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01729 #if _FS_RPATH 01730 if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */ 01731 (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) { 01732 lfn[di] = 0; 01733 for (i = 0; i < 11; i++) 01734 dj->fn[i] = (i < di) ? '.' : ' '; 01735 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */ 01736 return FR_OK; 01737 } 01738 #endif 01739 while (di) { /* Strip trailing spaces and dots */ 01740 w = lfn[di-1]; 01741 if (w != ' ' && w != '.') break; 01742 di--; 01743 } 01744 if (!di) return FR_INVALID_NAME; /* Reject nul string */ 01745 01746 lfn[di] = 0; /* LFN is created */ 01747 01748 /* Create SFN in directory form */ 01749 mem_set(dj->fn, ' ', 11); 01750 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ 01751 if (si) cf |= NS_LOSS | NS_LFN; 01752 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ 01753 01754 b = i = 0; 01755 ni = 8; 01756 for (;;) { 01757 w = lfn[si++]; /* Get an LFN char */ 01758 if (!w) break; /* Break on end of the LFN */ 01759 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ 01760 cf |= NS_LOSS | NS_LFN; 01761 continue; 01762 } 01763 01764 if (i >= ni || si == di) { /* Extension or end of SFN */ 01765 if (ni == 11) { /* Long extension */ 01766 cf |= NS_LOSS | NS_LFN; 01767 break; 01768 } 01769 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ 01770 if (si > di) break; /* No extension */ 01771 si = di; 01772 i = 8; 01773 ni = 11; /* Enter extension section */ 01774 b <<= 2; 01775 continue; 01776 } 01777 01778 if (w >= 0x80) { /* Non ASCII char */ 01779 #ifdef _EXCVT 01780 w = ff_convert(w, 0); /* Unicode -> OEM code */ 01781 if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */ 01782 #else 01783 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ 01784 #endif 01785 cf |= NS_LFN; /* Force create LFN entry */ 01786 } 01787 01788 if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */ 01789 if (i >= ni - 1) { 01790 cf |= NS_LOSS | NS_LFN; 01791 i = ni; 01792 continue; 01793 } 01794 dj->fn[i++] = (BYTE)(w >> 8); 01795 } else { /* Single byte char */ 01796 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */ 01797 w = '_'; 01798 cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 01799 } else { 01800 if (IsUpper(w)) { /* ASCII large capital */ 01801 b |= 2; 01802 } else { 01803 if (IsLower(w)) { /* ASCII small capital */ 01804 b |= 1; 01805 w -= 0x20; 01806 } 01807 } 01808 } 01809 } 01810 dj->fn[i++] = (BYTE)w; 01811 } 01812 01813 if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */ 01814 01815 if (ni == 8) b <<= 2; 01816 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ 01817 cf |= NS_LFN; 01818 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */ 01819 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ 01820 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ 01821 } 01822 01823 dj->fn[NS] = cf; /* SFN is created */ 01824 01825 return FR_OK; 01826 01827 01828 #else /* Non-LFN configuration */ 01829 BYTE b, c, d, *sfn; 01830 UINT ni, si, i; 01831 const char *p; 01832 01833 /* Create file name in directory form */ 01834 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01835 sfn = dj->fn; 01836 mem_set(sfn, ' ', 11); 01837 si = i = b = 0; 01838 ni = 8; 01839 #if _FS_RPATH 01840 if (p[si] == '.') { /* Is this a dot entry? */ 01841 for (;;) { 01842 c = (BYTE)p[si++]; 01843 if (c != '.' || si >= 3) break; 01844 sfn[i++] = c; 01845 } 01846 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 01847 *path = &p[si]; /* Return pointer to the next segment */ 01848 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ 01849 return FR_OK; 01850 } 01851 #endif 01852 for (;;) { 01853 c = (BYTE)p[si++]; 01854 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ 01855 if (c == '.' || i >= ni) { 01856 if (ni != 8 || c != '.') return FR_INVALID_NAME; 01857 i = 8; 01858 ni = 11; 01859 b <<= 2; 01860 continue; 01861 } 01862 if (c >= 0x80) { /* Extended char? */ 01863 b |= 3; /* Eliminate NT flag */ 01864 #ifdef _EXCVT 01865 c = excvt[c - 0x80]; /* Upper conversion (SBCS) */ 01866 #else 01867 #if !_DF1S /* ASCII only cfg */ 01868 return FR_INVALID_NAME; 01869 #endif 01870 #endif 01871 } 01872 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01873 d = (BYTE)p[si++]; /* Get 2nd byte */ 01874 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ 01875 return FR_INVALID_NAME; 01876 sfn[i++] = c; 01877 sfn[i++] = d; 01878 } else { /* Single byte code */ 01879 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ 01880 return FR_INVALID_NAME; 01881 if (IsUpper(c)) { /* ASCII large capital? */ 01882 b |= 2; 01883 } else { 01884 if (IsLower(c)) { /* ASCII small capital? */ 01885 b |= 1; 01886 c -= 0x20; 01887 } 01888 } 01889 sfn[i++] = c; 01890 } 01891 } 01892 *path = &p[si]; /* Return pointer to the next segment */ 01893 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01894 01895 if (!i) return FR_INVALID_NAME; /* Reject nul string */ 01896 if (sfn[0] == DDE) sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */ 01897 01898 if (ni == 8) b <<= 2; 01899 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ 01900 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ 01901 01902 sfn[NS] = c; /* Store NT flag, File name is created */ 01903 01904 return FR_OK; 01905 #endif 01906 } 01907 01908 01909 01910 01911 /*-----------------------------------------------------------------------*/ 01912 /* Get file information from directory entry */ 01913 /*-----------------------------------------------------------------------*/ 01914 #if _FS_MINIMIZE <= 1 01915 static 01916 void get_fileinfo ( /* No return code */ 01917 FATFS_DIR *dj, /* Pointer to the directory object */ 01918 FILINFO *fno /* Pointer to the file information to be filled */ 01919 ) 01920 { 01921 UINT i; 01922 BYTE nt, *dir; 01923 TCHAR *p, c; 01924 01925 01926 p = fno->fname; 01927 if (dj->sect) { 01928 dir = dj->dir; 01929 nt = dir[DIR_NTres]; /* NT flag */ 01930 for (i = 0; i < 8; i++) { /* Copy name body */ 01931 c = dir[i]; 01932 if (c == ' ') break; 01933 if (c == NDDE) c = (TCHAR)DDE; 01934 if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20; 01935 #if _LFN_UNICODE 01936 if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1])) 01937 c = (c << 8) | dir[++i]; 01938 c = ff_convert(c, 1); 01939 if (!c) c = '?'; 01940 #endif 01941 *p++ = c; 01942 } 01943 if (dir[8] != ' ') { /* Copy name extension */ 01944 *p++ = '.'; 01945 for (i = 8; i < 11; i++) { 01946 c = dir[i]; 01947 if (c == ' ') break; 01948 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20; 01949 #if _LFN_UNICODE 01950 if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1])) 01951 c = (c << 8) | dir[++i]; 01952 c = ff_convert(c, 1); 01953 if (!c) c = '?'; 01954 #endif 01955 *p++ = c; 01956 } 01957 } 01958 fno->fattrib = dir[DIR_Attr]; /* Attribute */ 01959 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ 01960 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ 01961 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ 01962 } 01963 *p = 0; /* Terminate SFN str by a \0 */ 01964 01965 #if _USE_LFN 01966 if (fno->lfname && fno->lfsize) { 01967 TCHAR *tp = fno->lfname; 01968 WCHAR w, *lfn; 01969 01970 i = 0; 01971 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */ 01972 lfn = dj->lfn; 01973 while ((w = *lfn++) != 0) { /* Get an LFN char */ 01974 #if !_LFN_UNICODE 01975 w = ff_convert(w, 0); /* Unicode -> OEM conversion */ 01976 if (!w) { 01977 i = 0; /* Could not convert, no LFN */ 01978 break; 01979 } 01980 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ 01981 tp[i++] = (TCHAR)(w >> 8); 01982 #endif 01983 if (i >= fno->lfsize - 1) { 01984 i = 0; /* Buffer overflow, no LFN */ 01985 break; 01986 } 01987 tp[i++] = (TCHAR)w; 01988 } 01989 } 01990 tp[i] = 0; /* Terminate the LFN str by a \0 */ 01991 } 01992 #endif 01993 } 01994 #endif /* _FS_MINIMIZE <= 1 */ 01995 01996 01997 01998 01999 /*-----------------------------------------------------------------------*/ 02000 /* Follow a file path */ 02001 /*-----------------------------------------------------------------------*/ 02002 02003 static 02004 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 02005 FATFS_DIR *dj, /* Directory object to return last directory and found object */ 02006 const TCHAR *path /* Full-path string to find a file or directory */ 02007 ) 02008 { 02009 FRESULT res; 02010 BYTE *dir, ns; 02011 02012 02013 #if _FS_RPATH 02014 if (*path == '/' || *path == '\\') { /* There is a heading separator */ 02015 path++; 02016 dj->sclust = 0; /* Strip it and start from the root dir */ 02017 } else { /* No heading separator */ 02018 dj->sclust = dj->fs->cdir; /* Start from the current dir */ 02019 } 02020 #else 02021 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ 02022 path++; 02023 dj->sclust = 0; /* Start from the root dir */ 02024 #endif 02025 02026 if ((UINT)*path < ' ') { /* Nul path means the start directory itself */ 02027 res = dir_sdi(dj, 0); 02028 dj->dir = 0; 02029 } else { /* Follow path */ 02030 for (;;) { 02031 res = create_name(dj, &path); /* Get a segment */ 02032 if (res != FR_OK) break; 02033 res = dir_find(dj); /* Find it */ 02034 ns = *(dj->fn+NS); 02035 if (res != FR_OK) { /* Failed to find the object */ 02036 if (res != FR_NO_FILE) break; /* Abort if any hard error occurred */ 02037 /* Object not found */ 02038 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */ 02039 dj->sclust = 0; 02040 dj->dir = 0; /* It is the root dir */ 02041 res = FR_OK; 02042 if (!(ns & NS_LAST)) continue; 02043 } else { /* Could not find the object */ 02044 if (!(ns & NS_LAST)) res = FR_NO_PATH; 02045 } 02046 break; 02047 } 02048 if (ns & NS_LAST) break; /* Last segment match. Function completed. */ 02049 dir = dj->dir; /* There is next segment. Follow the sub directory */ 02050 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ 02051 res = FR_NO_PATH; 02052 break; 02053 } 02054 dj->sclust = ld_clust(dj->fs, dir); 02055 } 02056 } 02057 02058 return res; 02059 } 02060 02061 02062 02063 02064 /*-----------------------------------------------------------------------*/ 02065 /* Load a sector and check if it is an FAT Volume Boot Record */ 02066 /*-----------------------------------------------------------------------*/ 02067 02068 static 02069 BYTE check_fs ( /* 0:FAT-VBR, 1:Any BR but not FAT, 2:Not a BR, 3:Disk error */ 02070 FATFS *fs, /* File system object */ 02071 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ 02072 ) 02073 { 02074 if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */ 02075 return 3; 02076 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */ 02077 return 2; 02078 02079 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 02080 return 0; 02081 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) 02082 return 0; 02083 02084 return 1; 02085 } 02086 02087 02088 02089 02090 /*-----------------------------------------------------------------------*/ 02091 /* Check if the file system object is valid or not */ 02092 /*-----------------------------------------------------------------------*/ 02093 02094 static 02095 FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */ 02096 const TCHAR **path, /* Pointer to pointer to the path name (drive number) */ 02097 FATFS **rfs, /* Pointer to pointer to the found file system object */ 02098 BYTE wmode /* !=0: Check write protection for write access */ 02099 ) 02100 { 02101 BYTE fmt, b, pi, *tbl; 02102 UINT vol; 02103 DSTATUS stat; 02104 DWORD bsect, fasize, tsect, sysect, nclst, szbfat; 02105 WORD nrsv; 02106 const TCHAR *p = *path; 02107 FATFS *fs; 02108 02109 02110 /* Get logical drive number from the path name */ 02111 vol = p[0] - '0'; /* Is there a drive number? */ 02112 if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */ 02113 p += 2; 02114 *path = p; /* Return pointer to the path name */ 02115 } else { /* No drive number is given */ 02116 #if _FS_RPATH 02117 vol = CurrVol; /* Use current drive */ 02118 #else 02119 vol = 0; /* Use drive 0 */ 02120 #endif 02121 } 02122 02123 /* Check if the file system object is valid or not */ 02124 *rfs = 0; 02125 if (vol >= _VOLUMES) /* Is the drive number valid? */ 02126 return FR_INVALID_DRIVE; 02127 fs = FatFs[vol]; /* Get corresponding file system object */ 02128 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ 02129 02130 ENTER_FF(fs); /* Lock file system */ 02131 02132 *rfs = fs; /* Return pointer to the corresponding file system object */ 02133 if (fs->fs_type) { /* If the volume has been mounted */ 02134 stat = disk_status(fs->drv); 02135 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */ 02136 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */ 02137 return FR_WRITE_PROTECTED; 02138 return FR_OK; /* The file system object is valid */ 02139 } 02140 } 02141 02142 /* The file system object is not valid. */ 02143 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */ 02144 02145 fs->fs_type = 0; /* Clear the file system object */ 02146 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */ 02147 stat = disk_initialize(fs->drv); /* Initialize the physical drive */ 02148 if (stat & STA_NOINIT) /* Check if the initialization succeeded */ 02149 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ 02150 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */ 02151 return FR_WRITE_PROTECTED; 02152 #if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */ 02153 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK) 02154 return FR_DISK_ERR; 02155 #endif 02156 /* Search FAT partition on the drive. Supports only generic partitions, FDISK and SFD. */ 02157 fmt = check_fs(fs, bsect = 0); /* Load sector 0 and check if it is an FAT-VBR (in SFD) */ 02158 if (LD2PT(vol) && !fmt) fmt = 1; /* Force non-SFD if the volume is forced partition */ 02159 if (fmt == 1) { /* Not an FAT-VBR, the physical drive can be partitioned */ 02160 /* Check the partition listed in the partition table */ 02161 pi = LD2PT(vol); 02162 if (pi) pi--; 02163 tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */ 02164 if (tbl[4]) { /* Is the partition existing? */ 02165 bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */ 02166 fmt = check_fs(fs, bsect); /* Check the partition */ 02167 } 02168 } 02169 if (fmt == 3) return FR_DISK_ERR; 02170 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 02171 02172 /* An FAT volume is found. Following code initializes the file system object */ 02173 02174 if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ 02175 return FR_NO_FILESYSTEM; 02176 02177 fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */ 02178 if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32); 02179 fs->fsize = fasize; 02180 02181 fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */ 02182 if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ 02183 fasize *= b; /* Number of sectors for FAT area */ 02184 02185 fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ 02186 if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ 02187 02188 fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */ 02189 if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */ 02190 02191 tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */ 02192 if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32); 02193 02194 nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */ 02195 if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */ 02196 02197 /* Determine the FAT sub type */ 02198 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */ 02199 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02200 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 02201 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02202 fmt = FS_FAT12; 02203 if (nclst >= MIN_FAT16) fmt = FS_FAT16; 02204 if (nclst >= MIN_FAT32) fmt = FS_FAT32; 02205 02206 /* Boundaries and Limits */ 02207 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 02208 fs->database = bsect + sysect; /* Data start sector */ 02209 fs->fatbase = bsect + nrsv; /* FAT start sector */ 02210 if (fmt == FS_FAT32) { 02211 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 02212 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */ 02213 szbfat = fs->n_fatent * 4; /* (Required FAT size) */ 02214 } else { 02215 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 02216 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 02217 szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */ 02218 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 02219 } 02220 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */ 02221 return FR_NO_FILESYSTEM; 02222 02223 #if !_FS_READONLY 02224 /* Initialize cluster allocation information */ 02225 fs->free_clust = 0xFFFFFFFF; 02226 fs->last_clust = 0; 02227 02228 /* Get fsinfo if available */ 02229 if (fmt == FS_FAT32) { 02230 fs->fsi_flag = 0; 02231 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo); 02232 if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK && 02233 LD_WORD(fs->win+BS_55AA) == 0xAA55 && 02234 LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 && 02235 LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) { 02236 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free); 02237 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count); 02238 } 02239 } 02240 #endif 02241 fs->fs_type = fmt; /* FAT sub-type */ 02242 fs->id = ++Fsid; /* File system mount ID */ 02243 fs->winsect = 0; /* Invalidate sector cache */ 02244 fs->wflag = 0; 02245 #if _FS_RPATH 02246 fs->cdir = 0; /* Current directory (root dir) */ 02247 #endif 02248 #if _FS_LOCK /* Clear file lock semaphores */ 02249 clear_lock(fs); 02250 #endif 02251 02252 return FR_OK; 02253 } 02254 02255 02256 02257 02258 /*-----------------------------------------------------------------------*/ 02259 /* Check if the file/dir object is valid or not */ 02260 /*-----------------------------------------------------------------------*/ 02261 02262 static 02263 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ 02264 void* obj /* Pointer to the object FIL/DIR to check validity */ 02265 ) 02266 { 02267 FIL *fil; 02268 02269 02270 fil = (FIL*)obj; /* Assuming offset of fs and id in the FIL/DIR is identical */ 02271 if (!fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id) 02272 return FR_INVALID_OBJECT; 02273 02274 ENTER_FF(fil->fs); /* Lock file system */ 02275 02276 if (disk_status(fil->fs->drv) & STA_NOINIT) 02277 return FR_NOT_READY; 02278 02279 return FR_OK; 02280 } 02281 02282 02283 02284 02285 /*-------------------------------------------------------------------------- 02286 02287 Public Functions 02288 02289 --------------------------------------------------------------------------*/ 02290 02291 02292 02293 /*-----------------------------------------------------------------------*/ 02294 /* Mount/Unmount a Logical Drive */ 02295 /*-----------------------------------------------------------------------*/ 02296 02297 FRESULT f_mount ( 02298 BYTE vol, /* Logical drive number to be mounted/unmounted */ 02299 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/ 02300 ) 02301 { 02302 FATFS *rfs; 02303 02304 02305 if (vol >= _VOLUMES) /* Check if the drive number is valid */ 02306 return FR_INVALID_DRIVE; 02307 rfs = FatFs[vol]; /* Get current fs object */ 02308 02309 if (rfs) { 02310 #if _FS_LOCK 02311 clear_lock(rfs); 02312 #endif 02313 #if _FS_REENTRANT /* Discard sync object of the current volume */ 02314 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR; 02315 #endif 02316 rfs->fs_type = 0; /* Clear old fs object */ 02317 } 02318 02319 if (fs) { 02320 fs->fs_type = 0; /* Clear new fs object */ 02321 #if _FS_REENTRANT /* Create sync object for the new volume */ 02322 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR; 02323 #endif 02324 } 02325 FatFs[vol] = fs; /* Register new fs object */ 02326 02327 return FR_OK; 02328 } 02329 02330 02331 02332 02333 /*-----------------------------------------------------------------------*/ 02334 /* Open or Create a File */ 02335 /*-----------------------------------------------------------------------*/ 02336 02337 FRESULT f_open ( 02338 FIL *fp, /* Pointer to the blank file object */ 02339 const TCHAR *path, /* Pointer to the file name */ 02340 BYTE mode /* Access mode and file open mode flags */ 02341 ) 02342 { 02343 FRESULT res; 02344 FATFS_DIR dj; 02345 BYTE *dir; 02346 DEF_NAMEBUF; 02347 02348 02349 if (!fp) return FR_INVALID_OBJECT; 02350 fp->fs = 0; /* Clear file object */ 02351 02352 #if !_FS_READONLY 02353 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; 02354 res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ)); 02355 #else 02356 mode &= FA_READ; 02357 res = chk_mounted(&path, &dj.fs, 0); 02358 #endif 02359 if (res == FR_OK) { 02360 INIT_BUF(dj); 02361 res = follow_path(&dj, path); /* Follow the file path */ 02362 dir = dj.dir; 02363 #if !_FS_READONLY /* R/W configuration */ 02364 if (res == FR_OK) { 02365 if (!dir) /* Current dir itself */ 02366 res = FR_INVALID_NAME; 02367 #if _FS_LOCK 02368 else 02369 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02370 #endif 02371 } 02372 /* Create or Open a file */ 02373 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 02374 DWORD dw, cl; 02375 02376 if (res != FR_OK) { /* No file, create new */ 02377 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ 02378 #if _FS_LOCK 02379 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 02380 #else 02381 res = dir_register(&dj); 02382 #endif 02383 mode |= FA_CREATE_ALWAYS; /* File is created */ 02384 dir = dj.dir; /* New entry */ 02385 } else { /* Any object is already existing */ 02386 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ 02387 res = FR_DENIED; 02388 } else { 02389 if (mode & FA_CREATE_NEW) /* Cannot create as new file */ 02390 res = FR_EXIST; 02391 } 02392 } 02393 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ 02394 dw = get_fattime(); /* Created time */ 02395 ST_DWORD(dir+DIR_CrtTime, dw); 02396 dir[DIR_Attr] = 0; /* Reset attribute */ 02397 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */ 02398 cl = ld_clust(dj.fs, dir); /* Get start cluster */ 02399 st_clust(dir, 0); /* cluster = 0 */ 02400 dj.fs->wflag = 1; 02401 if (cl) { /* Remove the cluster chain if exist */ 02402 dw = dj.fs->winsect; 02403 res = remove_chain(dj.fs, cl); 02404 if (res == FR_OK) { 02405 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ 02406 res = move_window(dj.fs, dw); 02407 } 02408 } 02409 } 02410 } else { /* Open an existing file */ 02411 if (res == FR_OK) { /* Follow succeeded */ 02412 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ 02413 res = FR_NO_FILE; 02414 } else { 02415 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ 02416 res = FR_DENIED; 02417 } 02418 } 02419 } 02420 if (res == FR_OK) { 02421 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ 02422 mode |= FA__WRITTEN; 02423 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ 02424 fp->dir_ptr = dir; 02425 #if _FS_LOCK 02426 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02427 if (!fp->lockid) res = FR_INT_ERR; 02428 #endif 02429 } 02430 02431 #else /* R/O configuration */ 02432 if (res == FR_OK) { /* Follow succeeded */ 02433 dir = dj.dir; 02434 if (!dir) { /* Current dir itself */ 02435 res = FR_INVALID_NAME; 02436 } else { 02437 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ 02438 res = FR_NO_FILE; 02439 } 02440 } 02441 #endif 02442 FREE_BUF(); 02443 02444 if (res == FR_OK) { 02445 fp->flag = mode; /* File access mode */ 02446 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */ 02447 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ 02448 fp->fptr = 0; /* File pointer */ 02449 fp->dsect = 0; 02450 #if _USE_FASTSEEK 02451 fp->cltbl = 0; /* Normal seek mode */ 02452 #endif 02453 fp->fs = dj.fs; 02454 fp->id = dj.fs->id; /* Validate file object */ 02455 } 02456 } 02457 02458 LEAVE_FF(dj.fs, res); 02459 } 02460 02461 02462 02463 02464 /*-----------------------------------------------------------------------*/ 02465 /* Read File */ 02466 /*-----------------------------------------------------------------------*/ 02467 02468 FRESULT f_read ( 02469 FIL *fp, /* Pointer to the file object */ 02470 void *buff, /* Pointer to data buffer */ 02471 UINT btr, /* Number of bytes to read */ 02472 UINT *br /* Pointer to number of bytes read */ 02473 ) 02474 { 02475 FRESULT res; 02476 DWORD clst, sect, remain; 02477 UINT rcnt, cc; 02478 BYTE csect, *rbuff = (BYTE *)buff; 02479 02480 02481 *br = 0; /* Clear read byte counter */ 02482 02483 res = validate(fp); /* Check validity */ 02484 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02485 if (fp->flag & FA__ERROR) /* Aborted file? */ 02486 LEAVE_FF(fp->fs, FR_INT_ERR); 02487 if (!(fp->flag & FA_READ)) /* Check access mode */ 02488 LEAVE_FF(fp->fs, FR_DENIED); 02489 remain = fp->fsize - fp->fptr; 02490 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 02491 02492 for ( ; btr; /* Repeat until all data read */ 02493 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { 02494 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02495 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02496 if (!csect) { /* On the cluster boundary? */ 02497 if (fp->fptr == 0) { /* On the top of the file? */ 02498 clst = fp->sclust; /* Follow from the origin */ 02499 } else { /* Middle or end of the file */ 02500 #if _USE_FASTSEEK 02501 if (fp->cltbl) 02502 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02503 else 02504 #endif 02505 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ 02506 } 02507 if (clst < 2) ABORT(fp->fs, FR_INT_ERR); 02508 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02509 fp->clust = clst; /* Update current cluster */ 02510 } 02511 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02512 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02513 sect += csect; 02514 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ 02515 if (cc) { /* Read maximum contiguous sectors directly */ 02516 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02517 cc = fp->fs->csize - csect; 02518 if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK) 02519 ABORT(fp->fs, FR_DISK_ERR); 02520 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 02521 #if _FS_TINY 02522 if (fp->fs->wflag && fp->fs->winsect - sect < cc) 02523 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); 02524 #else 02525 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) 02526 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); 02527 #endif 02528 #endif 02529 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02530 continue; 02531 } 02532 #if !_FS_TINY 02533 if (fp->dsect != sect) { /* Load data sector if not in cache */ 02534 #if !_FS_READONLY 02535 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02536 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02537 ABORT(fp->fs, FR_DISK_ERR); 02538 fp->flag &= ~FA__DIRTY; 02539 } 02540 #endif 02541 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ 02542 ABORT(fp->fs, FR_DISK_ERR); 02543 } 02544 #endif 02545 fp->dsect = sect; 02546 } 02547 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ 02548 if (rcnt > btr) rcnt = btr; 02549 #if _FS_TINY 02550 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 02551 ABORT(fp->fs, FR_DISK_ERR); 02552 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02553 #else 02554 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02555 #endif 02556 } 02557 02558 LEAVE_FF(fp->fs, FR_OK); 02559 } 02560 02561 02562 02563 02564 #if !_FS_READONLY 02565 /*-----------------------------------------------------------------------*/ 02566 /* Write File */ 02567 /*-----------------------------------------------------------------------*/ 02568 02569 FRESULT f_write ( 02570 FIL *fp, /* Pointer to the file object */ 02571 const void *buff, /* Pointer to the data to be written */ 02572 UINT btw, /* Number of bytes to write */ 02573 UINT *bw /* Pointer to number of bytes written */ 02574 ) 02575 { 02576 FRESULT res; 02577 DWORD clst, sect; 02578 UINT wcnt, cc; 02579 const BYTE *wbuff = (const BYTE *)buff; 02580 BYTE csect; 02581 02582 02583 *bw = 0; /* Clear write byte counter */ 02584 02585 res = validate(fp); /* Check validity */ 02586 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02587 if (fp->flag & FA__ERROR) /* Aborted file? */ 02588 LEAVE_FF(fp->fs, FR_INT_ERR); 02589 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 02590 LEAVE_FF(fp->fs, FR_DENIED); 02591 if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0; /* File size cannot reach 4GB */ 02592 02593 for ( ; btw; /* Repeat until all data written */ 02594 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { 02595 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02596 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02597 if (!csect) { /* On the cluster boundary? */ 02598 if (fp->fptr == 0) { /* On the top of the file? */ 02599 clst = fp->sclust; /* Follow from the origin */ 02600 if (clst == 0) /* When no cluster is allocated, */ 02601 fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ 02602 } else { /* Middle or end of the file */ 02603 #if _USE_FASTSEEK 02604 if (fp->cltbl) 02605 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02606 else 02607 #endif 02608 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ 02609 } 02610 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 02611 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 02612 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02613 fp->clust = clst; /* Update current cluster */ 02614 } 02615 #if _FS_TINY 02616 if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */ 02617 ABORT(fp->fs, FR_DISK_ERR); 02618 #else 02619 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ 02620 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02621 ABORT(fp->fs, FR_DISK_ERR); 02622 fp->flag &= ~FA__DIRTY; 02623 } 02624 #endif 02625 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02626 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02627 sect += csect; 02628 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ 02629 if (cc) { /* Write maximum contiguous sectors directly */ 02630 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02631 cc = fp->fs->csize - csect; 02632 if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK) 02633 ABORT(fp->fs, FR_DISK_ERR); 02634 #if _FS_TINY 02635 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02636 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); 02637 fp->fs->wflag = 0; 02638 } 02639 #else 02640 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02641 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); 02642 fp->flag &= ~FA__DIRTY; 02643 } 02644 #endif 02645 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02646 continue; 02647 } 02648 #if _FS_TINY 02649 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ 02650 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR); 02651 fp->fs->winsect = sect; 02652 } 02653 #else 02654 if (fp->dsect != sect) { /* Fill sector cache with file data */ 02655 if (fp->fptr < fp->fsize && 02656 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) 02657 ABORT(fp->fs, FR_DISK_ERR); 02658 } 02659 #endif 02660 fp->dsect = sect; 02661 } 02662 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */ 02663 if (wcnt > btw) wcnt = btw; 02664 #if _FS_TINY 02665 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 02666 ABORT(fp->fs, FR_DISK_ERR); 02667 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02668 fp->fs->wflag = 1; 02669 #else 02670 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02671 fp->flag |= FA__DIRTY; 02672 #endif 02673 } 02674 02675 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ 02676 fp->flag |= FA__WRITTEN; /* Set file change flag */ 02677 02678 LEAVE_FF(fp->fs, FR_OK); 02679 } 02680 02681 02682 02683 02684 /*-----------------------------------------------------------------------*/ 02685 /* Synchronize the File Object */ 02686 /*-----------------------------------------------------------------------*/ 02687 02688 FRESULT f_sync ( 02689 FIL *fp /* Pointer to the file object */ 02690 ) 02691 { 02692 FRESULT res; 02693 DWORD tim; 02694 BYTE *dir; 02695 02696 02697 res = validate(fp); /* Check validity of the object */ 02698 if (res == FR_OK) { 02699 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */ 02700 #if !_FS_TINY /* Write-back dirty buffer */ 02701 if (fp->flag & FA__DIRTY) { 02702 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02703 LEAVE_FF(fp->fs, FR_DISK_ERR); 02704 fp->flag &= ~FA__DIRTY; 02705 } 02706 #endif 02707 /* Update the directory entry */ 02708 res = move_window(fp->fs, fp->dir_sect); 02709 if (res == FR_OK) { 02710 dir = fp->dir_ptr; 02711 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ 02712 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */ 02713 st_clust(dir, fp->sclust); /* Update start cluster */ 02714 tim = get_fattime(); /* Update updated time */ 02715 ST_DWORD(dir+DIR_WrtTime, tim); 02716 ST_WORD(dir+DIR_LstAccDate, 0); 02717 fp->flag &= ~FA__WRITTEN; 02718 fp->fs->wflag = 1; 02719 res = sync(fp->fs); 02720 } 02721 } 02722 } 02723 02724 LEAVE_FF(fp->fs, res); 02725 } 02726 02727 #endif /* !_FS_READONLY */ 02728 02729 02730 02731 02732 /*-----------------------------------------------------------------------*/ 02733 /* Close File */ 02734 /*-----------------------------------------------------------------------*/ 02735 02736 FRESULT f_close ( 02737 FIL *fp /* Pointer to the file object to be closed */ 02738 ) 02739 { 02740 FRESULT res; 02741 02742 02743 #if _FS_READONLY 02744 res = validate(fp); 02745 { 02746 #if _FS_REENTRANT 02747 FATFS *fs = fp->fs; 02748 #endif 02749 if (res == FR_OK) fp->fs = 0; /* Discard file object */ 02750 LEAVE_FF(fs, res); 02751 } 02752 #else 02753 res = f_sync(fp); /* Flush cached data */ 02754 #if _FS_LOCK 02755 if (res == FR_OK) { /* Decrement open counter */ 02756 #if _FS_REENTRANT 02757 FATFS *fs = fp->fs;; 02758 res = validate(fp); 02759 if (res == FR_OK) { 02760 res = dec_lock(fp->lockid); 02761 unlock_fs(fs, FR_OK); 02762 } 02763 #else 02764 res = dec_lock(fp->lockid); 02765 #endif 02766 } 02767 #endif 02768 if (res == FR_OK) fp->fs = 0; /* Discard file object */ 02769 return res; 02770 #endif 02771 } 02772 02773 02774 02775 02776 /*-----------------------------------------------------------------------*/ 02777 /* Current Drive/Directory Handlings */ 02778 /*-----------------------------------------------------------------------*/ 02779 02780 #if _FS_RPATH >= 1 02781 02782 FRESULT f_chdrive ( 02783 BYTE drv /* Drive number */ 02784 ) 02785 { 02786 if (drv >= _VOLUMES) return FR_INVALID_DRIVE; 02787 02788 CurrVol = drv; 02789 02790 return FR_OK; 02791 } 02792 02793 02794 02795 FRESULT f_chdir ( 02796 const TCHAR *path /* Pointer to the directory path */ 02797 ) 02798 { 02799 FRESULT res; 02800 DIR dj; 02801 DEF_NAMEBUF; 02802 02803 02804 res = chk_mounted(&path, &dj.fs, 0); 02805 if (res == FR_OK) { 02806 INIT_BUF(dj); 02807 res = follow_path(&dj, path); /* Follow the path */ 02808 FREE_BUF(); 02809 if (res == FR_OK) { /* Follow completed */ 02810 if (!dj.dir) { 02811 dj.fs->cdir = dj.sclust; /* Start directory itself */ 02812 } else { 02813 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ 02814 dj.fs->cdir = ld_clust(dj.fs, dj.dir); 02815 else 02816 res = FR_NO_PATH; /* Reached but a file */ 02817 } 02818 } 02819 if (res == FR_NO_FILE) res = FR_NO_PATH; 02820 } 02821 02822 LEAVE_FF(dj.fs, res); 02823 } 02824 02825 02826 #if _FS_RPATH >= 2 02827 FRESULT f_getcwd ( 02828 TCHAR *path, /* Pointer to the directory path */ 02829 UINT sz_path /* Size of path */ 02830 ) 02831 { 02832 FRESULT res; 02833 DIR dj; 02834 UINT i, n; 02835 DWORD ccl; 02836 TCHAR *tp; 02837 FILINFO fno; 02838 DEF_NAMEBUF; 02839 02840 02841 *path = 0; 02842 res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */ 02843 if (res == FR_OK) { 02844 INIT_BUF(dj); 02845 i = sz_path; /* Bottom of buffer (dir stack base) */ 02846 dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */ 02847 while ((ccl = dj.sclust) != 0) { /* Repeat while current dir is a sub-dir */ 02848 res = dir_sdi(&dj, 1); /* Get parent dir */ 02849 if (res != FR_OK) break; 02850 res = dir_read(&dj); 02851 if (res != FR_OK) break; 02852 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent dir */ 02853 res = dir_sdi(&dj, 0); 02854 if (res != FR_OK) break; 02855 do { /* Find the entry links to the child dir */ 02856 res = dir_read(&dj); 02857 if (res != FR_OK) break; 02858 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */ 02859 res = dir_next(&dj, 0); 02860 } while (res == FR_OK); 02861 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 02862 if (res != FR_OK) break; 02863 #if _USE_LFN 02864 fno.lfname = path; 02865 fno.lfsize = i; 02866 #endif 02867 get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */ 02868 tp = fno.fname; 02869 if (_USE_LFN && *path) tp = path; 02870 for (n = 0; tp[n]; n++) ; 02871 if (i < n + 3) { 02872 res = FR_NOT_ENOUGH_CORE; 02873 break; 02874 } 02875 while (n) path[--i] = tp[--n]; 02876 path[--i] = '/'; 02877 } 02878 tp = path; 02879 if (res == FR_OK) { 02880 *tp++ = '0' + CurrVol; /* Put drive number */ 02881 *tp++ = ':'; 02882 if (i == sz_path) { /* Root-dir */ 02883 *tp++ = '/'; 02884 } else { /* Sub-dir */ 02885 do /* Add stacked path str */ 02886 *tp++ = path[i++]; 02887 while (i < sz_path); 02888 } 02889 } 02890 *tp = 0; 02891 FREE_BUF(); 02892 } 02893 02894 LEAVE_FF(dj.fs, res); 02895 } 02896 #endif /* _FS_RPATH >= 2 */ 02897 #endif /* _FS_RPATH >= 1 */ 02898 02899 02900 02901 #if _FS_MINIMIZE <= 2 02902 /*-----------------------------------------------------------------------*/ 02903 /* Seek File R/W Pointer */ 02904 /*-----------------------------------------------------------------------*/ 02905 02906 FRESULT f_lseek ( 02907 FIL *fp, /* Pointer to the file object */ 02908 DWORD ofs /* File pointer from top of file */ 02909 ) 02910 { 02911 FRESULT res; 02912 02913 02914 res = validate(fp); /* Check validity of the object */ 02915 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02916 if (fp->flag & FA__ERROR) /* Check abort flag */ 02917 LEAVE_FF(fp->fs, FR_INT_ERR); 02918 02919 #if _USE_FASTSEEK 02920 if (fp->cltbl) { /* Fast seek */ 02921 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 02922 02923 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 02924 tbl = fp->cltbl; 02925 tlen = *tbl++; 02926 ulen = 2; /* Given table size and required table size */ 02927 cl = fp->sclust; /* Top of the chain */ 02928 if (cl) { 02929 do { 02930 /* Get a fragment */ 02931 tcl = cl; 02932 ncl = 0; 02933 ulen += 2; /* Top, length and used items */ 02934 do { 02935 pcl = cl; 02936 ncl++; 02937 cl = get_fat(fp->fs, cl); 02938 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR); 02939 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02940 } while (cl == pcl + 1); 02941 if (ulen <= tlen) { /* Store the length and top of the fragment */ 02942 *tbl++ = ncl; 02943 *tbl++ = tcl; 02944 } 02945 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */ 02946 } 02947 *fp->cltbl = ulen; /* Number of items used */ 02948 if (ulen <= tlen) 02949 *tbl = 0; /* Terminate table */ 02950 else 02951 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 02952 02953 } else { /* Fast seek */ 02954 if (ofs > fp->fsize) /* Clip offset at the file size */ 02955 ofs = fp->fsize; 02956 fp->fptr = ofs; /* Set file pointer */ 02957 if (ofs) { 02958 fp->clust = clmt_clust(fp, ofs - 1); 02959 dsc = clust2sect(fp->fs, fp->clust); 02960 if (!dsc) ABORT(fp->fs, FR_INT_ERR); 02961 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1); 02962 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */ 02963 #if !_FS_TINY 02964 #if !_FS_READONLY 02965 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02966 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02967 ABORT(fp->fs, FR_DISK_ERR); 02968 fp->flag &= ~FA__DIRTY; 02969 } 02970 #endif 02971 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */ 02972 ABORT(fp->fs, FR_DISK_ERR); 02973 #endif 02974 fp->dsect = dsc; 02975 } 02976 } 02977 } 02978 } else 02979 #endif 02980 02981 /* Normal Seek */ 02982 { 02983 DWORD clst, bcs, nsect, ifptr; 02984 02985 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ 02986 #if !_FS_READONLY 02987 && !(fp->flag & FA_WRITE) 02988 #endif 02989 ) ofs = fp->fsize; 02990 02991 ifptr = fp->fptr; 02992 fp->fptr = nsect = 0; 02993 if (ofs) { 02994 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ 02995 if (ifptr > 0 && 02996 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 02997 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ 02998 ofs -= fp->fptr; 02999 clst = fp->clust; 03000 } else { /* When seek to back cluster, */ 03001 clst = fp->sclust; /* start from the first cluster */ 03002 #if !_FS_READONLY 03003 if (clst == 0) { /* If no cluster chain, create a new chain */ 03004 clst = create_chain(fp->fs, 0); 03005 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 03006 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03007 fp->sclust = clst; 03008 } 03009 #endif 03010 fp->clust = clst; 03011 } 03012 if (clst != 0) { 03013 while (ofs > bcs) { /* Cluster following loop */ 03014 #if !_FS_READONLY 03015 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 03016 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ 03017 if (clst == 0) { /* When disk gets full, clip file size */ 03018 ofs = bcs; 03019 break; 03020 } 03021 } else 03022 #endif 03023 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ 03024 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03025 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); 03026 fp->clust = clst; 03027 fp->fptr += bcs; 03028 ofs -= bcs; 03029 } 03030 fp->fptr += ofs; 03031 if (ofs % SS(fp->fs)) { 03032 nsect = clust2sect(fp->fs, clst); /* Current sector */ 03033 if (!nsect) ABORT(fp->fs, FR_INT_ERR); 03034 nsect += ofs / SS(fp->fs); 03035 } 03036 } 03037 } 03038 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ 03039 #if !_FS_TINY 03040 #if !_FS_READONLY 03041 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 03042 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 03043 ABORT(fp->fs, FR_DISK_ERR); 03044 fp->flag &= ~FA__DIRTY; 03045 } 03046 #endif 03047 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ 03048 ABORT(fp->fs, FR_DISK_ERR); 03049 #endif 03050 fp->dsect = nsect; 03051 } 03052 #if !_FS_READONLY 03053 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ 03054 fp->fsize = fp->fptr; 03055 fp->flag |= FA__WRITTEN; 03056 } 03057 #endif 03058 } 03059 03060 LEAVE_FF(fp->fs, res); 03061 } 03062 03063 03064 03065 #if _FS_MINIMIZE <= 1 03066 /*-----------------------------------------------------------------------*/ 03067 /* Create a Directory Object */ 03068 /*-----------------------------------------------------------------------*/ 03069 03070 FRESULT f_opendir ( 03071 FATFS_DIR *dj, /* Pointer to directory object to create */ 03072 const TCHAR *path /* Pointer to the directory path */ 03073 ) 03074 { 03075 FRESULT res; 03076 FATFS *fs; 03077 DEF_NAMEBUF; 03078 03079 03080 if (!dj) return FR_INVALID_OBJECT; 03081 03082 res = chk_mounted(&path, &dj->fs, 0); 03083 fs = dj->fs; 03084 if (res == FR_OK) { 03085 INIT_BUF(*dj); 03086 res = follow_path(dj, path); /* Follow the path to the directory */ 03087 FREE_BUF(); 03088 if (res == FR_OK) { /* Follow completed */ 03089 if (dj->dir) { /* It is not the root dir */ 03090 if (dj->dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ 03091 dj->sclust = ld_clust(fs, dj->dir); 03092 } else { /* The object is not a directory */ 03093 res = FR_NO_PATH; 03094 } 03095 } 03096 if (res == FR_OK) { 03097 dj->id = fs->id; 03098 res = dir_sdi(dj, 0); /* Rewind dir */ 03099 } 03100 } 03101 if (res == FR_NO_FILE) res = FR_NO_PATH; 03102 if (res != FR_OK) dj->fs = 0; /* Invalidate the dir object if function faild */ 03103 } else { 03104 dj->fs = 0; 03105 } 03106 03107 LEAVE_FF(fs, res); 03108 } 03109 03110 03111 03112 03113 /*-----------------------------------------------------------------------*/ 03114 /* Read Directory Entry in Sequence */ 03115 /*-----------------------------------------------------------------------*/ 03116 03117 FRESULT f_readdir ( 03118 FATFS_DIR *dj, /* Pointer to the open directory object */ 03119 FILINFO *fno /* Pointer to file information to return */ 03120 ) 03121 { 03122 FRESULT res; 03123 DEF_NAMEBUF; 03124 03125 03126 res = validate(dj); /* Check validity of the object */ 03127 if (res == FR_OK) { 03128 if (!fno) { 03129 res = dir_sdi(dj, 0); /* Rewind the directory object */ 03130 } else { 03131 INIT_BUF(*dj); 03132 res = dir_read(dj); /* Read an directory item */ 03133 if (res == FR_NO_FILE) { /* Reached end of dir */ 03134 dj->sect = 0; 03135 res = FR_OK; 03136 } 03137 if (res == FR_OK) { /* A valid entry is found */ 03138 get_fileinfo(dj, fno); /* Get the object information */ 03139 res = dir_next(dj, 0); /* Increment index for next */ 03140 if (res == FR_NO_FILE) { 03141 dj->sect = 0; 03142 res = FR_OK; 03143 } 03144 } 03145 FREE_BUF(); 03146 } 03147 } 03148 03149 LEAVE_FF(dj->fs, res); 03150 } 03151 03152 03153 03154 #if _FS_MINIMIZE == 0 03155 /*-----------------------------------------------------------------------*/ 03156 /* Get File Status */ 03157 /*-----------------------------------------------------------------------*/ 03158 03159 FRESULT f_stat ( 03160 const TCHAR *path, /* Pointer to the file path */ 03161 FILINFO *fno /* Pointer to file information to return */ 03162 ) 03163 { 03164 FRESULT res; 03165 FATFS_DIR dj; 03166 DEF_NAMEBUF; 03167 03168 03169 res = chk_mounted(&path, &dj.fs, 0); 03170 if (res == FR_OK) { 03171 INIT_BUF(dj); 03172 res = follow_path(&dj, path); /* Follow the file path */ 03173 if (res == FR_OK) { /* Follow completed */ 03174 if (dj.dir) /* Found an object */ 03175 get_fileinfo(&dj, fno); 03176 else /* It is root dir */ 03177 res = FR_INVALID_NAME; 03178 } 03179 FREE_BUF(); 03180 } 03181 03182 LEAVE_FF(dj.fs, res); 03183 } 03184 03185 03186 03187 #if !_FS_READONLY 03188 /*-----------------------------------------------------------------------*/ 03189 /* Get Number of Free Clusters */ 03190 /*-----------------------------------------------------------------------*/ 03191 03192 FRESULT f_getfree ( 03193 const TCHAR *path, /* Pointer to the logical drive number (root dir) */ 03194 DWORD *nclst, /* Pointer to the variable to return number of free clusters */ 03195 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */ 03196 ) 03197 { 03198 FRESULT res; 03199 FATFS *fs; 03200 DWORD n, clst, sect, stat; 03201 UINT i; 03202 BYTE fat, *p; 03203 03204 03205 /* Get drive number */ 03206 res = chk_mounted(&path, fatfs, 0); 03207 fs = *fatfs; 03208 if (res == FR_OK) { 03209 /* If free_clust is valid, return it without full cluster scan */ 03210 if (fs->free_clust <= fs->n_fatent - 2) { 03211 *nclst = fs->free_clust; 03212 } else { 03213 /* Get number of free clusters */ 03214 fat = fs->fs_type; 03215 n = 0; 03216 if (fat == FS_FAT12) { 03217 clst = 2; 03218 do { 03219 stat = get_fat(fs, clst); 03220 if (stat == 0xFFFFFFFF) { 03221 res = FR_DISK_ERR; 03222 break; 03223 } 03224 if (stat == 1) { 03225 res = FR_INT_ERR; 03226 break; 03227 } 03228 if (stat == 0) n++; 03229 } while (++clst < fs->n_fatent); 03230 } else { 03231 clst = fs->n_fatent; 03232 sect = fs->fatbase; 03233 i = 0; 03234 p = 0; 03235 do { 03236 if (!i) { 03237 res = move_window(fs, sect++); 03238 if (res != FR_OK) break; 03239 p = fs->win; 03240 i = SS(fs); 03241 } 03242 if (fat == FS_FAT16) { 03243 if (LD_WORD(p) == 0) n++; 03244 p += 2; 03245 i -= 2; 03246 } else { 03247 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++; 03248 p += 4; 03249 i -= 4; 03250 } 03251 } while (--clst); 03252 } 03253 fs->free_clust = n; 03254 if (fat == FS_FAT32) fs->fsi_flag = 1; 03255 *nclst = n; 03256 } 03257 } 03258 LEAVE_FF(fs, res); 03259 } 03260 03261 03262 03263 03264 /*-----------------------------------------------------------------------*/ 03265 /* Truncate File */ 03266 /*-----------------------------------------------------------------------*/ 03267 03268 FRESULT f_truncate ( 03269 FIL *fp /* Pointer to the file object */ 03270 ) 03271 { 03272 FRESULT res; 03273 DWORD ncl; 03274 03275 03276 if (!fp) return FR_INVALID_OBJECT; 03277 03278 res = validate(fp); /* Check validity of the object */ 03279 if (res == FR_OK) { 03280 if (fp->flag & FA__ERROR) { /* Check abort flag */ 03281 res = FR_INT_ERR; 03282 } else { 03283 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 03284 res = FR_DENIED; 03285 } 03286 } 03287 if (res == FR_OK) { 03288 if (fp->fsize > fp->fptr) { 03289 fp->fsize = fp->fptr; /* Set file size to current R/W point */ 03290 fp->flag |= FA__WRITTEN; 03291 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 03292 res = remove_chain(fp->fs, fp->sclust); 03293 fp->sclust = 0; 03294 } else { /* When truncate a part of the file, remove remaining clusters */ 03295 ncl = get_fat(fp->fs, fp->clust); 03296 res = FR_OK; 03297 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 03298 if (ncl == 1) res = FR_INT_ERR; 03299 if (res == FR_OK && ncl < fp->fs->n_fatent) { 03300 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); 03301 if (res == FR_OK) res = remove_chain(fp->fs, ncl); 03302 } 03303 } 03304 } 03305 if (res != FR_OK) fp->flag |= FA__ERROR; 03306 } 03307 03308 LEAVE_FF(fp->fs, res); 03309 } 03310 03311 03312 03313 03314 /*-----------------------------------------------------------------------*/ 03315 /* Delete a File or Directory */ 03316 /*-----------------------------------------------------------------------*/ 03317 03318 FRESULT f_unlink ( 03319 const TCHAR *path /* Pointer to the file or directory path */ 03320 ) 03321 { 03322 FRESULT res; 03323 FATFS_DIR dj, sdj; 03324 BYTE *dir; 03325 DWORD dclst; 03326 DEF_NAMEBUF; 03327 03328 03329 res = chk_mounted(&path, &dj.fs, 1); 03330 if (res == FR_OK) { 03331 INIT_BUF(dj); 03332 res = follow_path(&dj, path); /* Follow the file path */ 03333 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03334 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 03335 #if _FS_LOCK 03336 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */ 03337 #endif 03338 if (res == FR_OK) { /* The object is accessible */ 03339 dir = dj.dir; 03340 if (!dir) { 03341 res = FR_INVALID_NAME; /* Cannot remove the start directory */ 03342 } else { 03343 if (dir[DIR_Attr] & AM_RDO) 03344 res = FR_DENIED; /* Cannot remove R/O object */ 03345 } 03346 dclst = ld_clust(dj.fs, dir); 03347 if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */ 03348 if (dclst < 2) { 03349 res = FR_INT_ERR; 03350 } else { 03351 mem_cpy(&sdj, &dj, sizeof (FATFS_DIR)); /* Check if the sub-dir is empty or not */ 03352 sdj.sclust = dclst; 03353 res = dir_sdi(&sdj, 2); /* Exclude dot entries */ 03354 if (res == FR_OK) { 03355 res = dir_read(&sdj); 03356 if (res == FR_OK /* Not empty dir */ 03357 #if _FS_RPATH 03358 || dclst == dj.fs->cdir /* Current dir */ 03359 #endif 03360 ) res = FR_DENIED; 03361 if (res == FR_NO_FILE) res = FR_OK; /* Empty */ 03362 } 03363 } 03364 } 03365 if (res == FR_OK) { 03366 res = dir_remove(&dj); /* Remove the directory entry */ 03367 if (res == FR_OK) { 03368 if (dclst) /* Remove the cluster chain if exist */ 03369 res = remove_chain(dj.fs, dclst); 03370 if (res == FR_OK) res = sync(dj.fs); 03371 } 03372 } 03373 } 03374 FREE_BUF(); 03375 } 03376 LEAVE_FF(dj.fs, res); 03377 } 03378 03379 03380 03381 03382 /*-----------------------------------------------------------------------*/ 03383 /* Create a Directory */ 03384 /*-----------------------------------------------------------------------*/ 03385 03386 FRESULT f_mkdir ( 03387 const TCHAR *path /* Pointer to the directory path */ 03388 ) 03389 { 03390 FRESULT res; 03391 FATFS_DIR dj; 03392 BYTE *dir, n; 03393 DWORD dsc, dcl, pcl, tim = get_fattime(); 03394 DEF_NAMEBUF; 03395 03396 03397 res = chk_mounted(&path, &dj.fs, 1); 03398 if (res == FR_OK) { 03399 INIT_BUF(dj); 03400 res = follow_path(&dj, path); /* Follow the file path */ 03401 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 03402 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT)) 03403 res = FR_INVALID_NAME; 03404 if (res == FR_NO_FILE) { /* Can create a new directory */ 03405 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ 03406 res = FR_OK; 03407 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 03408 if (dcl == 1) res = FR_INT_ERR; 03409 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 03410 if (res == FR_OK) /* Flush FAT */ 03411 res = move_window(dj.fs, 0); 03412 if (res == FR_OK) { /* Initialize the new directory table */ 03413 dsc = clust2sect(dj.fs, dcl); 03414 dir = dj.fs->win; 03415 mem_set(dir, 0, SS(dj.fs)); 03416 mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */ 03417 dir[DIR_Name] = '.'; 03418 dir[DIR_Attr] = AM_DIR; 03419 ST_DWORD(dir+DIR_WrtTime, tim); 03420 st_clust(dir, dcl); 03421 mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */ 03422 dir[33] = '.'; 03423 pcl = dj.sclust; 03424 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) 03425 pcl = 0; 03426 st_clust(dir+SZ_DIR, pcl); 03427 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ 03428 dj.fs->winsect = dsc++; 03429 dj.fs->wflag = 1; 03430 res = move_window(dj.fs, 0); 03431 if (res != FR_OK) break; 03432 mem_set(dir, 0, SS(dj.fs)); 03433 } 03434 } 03435 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ 03436 if (res != FR_OK) { 03437 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ 03438 } else { 03439 dir = dj.dir; 03440 dir[DIR_Attr] = AM_DIR; /* Attribute */ 03441 ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */ 03442 st_clust(dir, dcl); /* Table start cluster */ 03443 dj.fs->wflag = 1; 03444 res = sync(dj.fs); 03445 } 03446 } 03447 FREE_BUF(); 03448 } 03449 03450 LEAVE_FF(dj.fs, res); 03451 } 03452 03453 03454 03455 03456 /*-----------------------------------------------------------------------*/ 03457 /* Change Attribute */ 03458 /*-----------------------------------------------------------------------*/ 03459 03460 FRESULT f_chmod ( 03461 const TCHAR *path, /* Pointer to the file path */ 03462 BYTE value, /* Attribute bits */ 03463 BYTE mask /* Attribute mask to change */ 03464 ) 03465 { 03466 FRESULT res; 03467 FATFS_DIR dj; 03468 BYTE *dir; 03469 DEF_NAMEBUF; 03470 03471 03472 res = chk_mounted(&path, &dj.fs, 1); 03473 if (res == FR_OK) { 03474 INIT_BUF(dj); 03475 res = follow_path(&dj, path); /* Follow the file path */ 03476 FREE_BUF(); 03477 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03478 res = FR_INVALID_NAME; 03479 if (res == FR_OK) { 03480 dir = dj.dir; 03481 if (!dir) { /* Is it a root directory? */ 03482 res = FR_INVALID_NAME; 03483 } else { /* File or sub directory */ 03484 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 03485 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 03486 dj.fs->wflag = 1; 03487 res = sync(dj.fs); 03488 } 03489 } 03490 } 03491 03492 LEAVE_FF(dj.fs, res); 03493 } 03494 03495 03496 03497 03498 /*-----------------------------------------------------------------------*/ 03499 /* Change Timestamp */ 03500 /*-----------------------------------------------------------------------*/ 03501 03502 FRESULT f_utime ( 03503 const TCHAR *path, /* Pointer to the file/directory name */ 03504 const FILINFO *fno /* Pointer to the time stamp to be set */ 03505 ) 03506 { 03507 FRESULT res; 03508 FATFS_DIR dj; 03509 BYTE *dir; 03510 DEF_NAMEBUF; 03511 03512 03513 res = chk_mounted(&path, &dj.fs, 1); 03514 if (res == FR_OK) { 03515 INIT_BUF(dj); 03516 res = follow_path(&dj, path); /* Follow the file path */ 03517 FREE_BUF(); 03518 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03519 res = FR_INVALID_NAME; 03520 if (res == FR_OK) { 03521 dir = dj.dir; 03522 if (!dir) { /* Root directory */ 03523 res = FR_INVALID_NAME; 03524 } else { /* File or sub-directory */ 03525 ST_WORD(dir+DIR_WrtTime, fno->ftime); 03526 ST_WORD(dir+DIR_WrtDate, fno->fdate); 03527 dj.fs->wflag = 1; 03528 res = sync(dj.fs); 03529 } 03530 } 03531 } 03532 03533 LEAVE_FF(dj.fs, res); 03534 } 03535 03536 03537 03538 03539 /*-----------------------------------------------------------------------*/ 03540 /* Rename File/Directory */ 03541 /*-----------------------------------------------------------------------*/ 03542 03543 FRESULT f_rename ( 03544 const TCHAR *path_old, /* Pointer to the old name */ 03545 const TCHAR *path_new /* Pointer to the new name */ 03546 ) 03547 { 03548 FRESULT res; 03549 FATFS_DIR djo, djn; 03550 BYTE buf[21], *dir; 03551 DWORD dw; 03552 DEF_NAMEBUF; 03553 03554 03555 res = chk_mounted(&path_old, &djo.fs, 1); 03556 if (res == FR_OK) { 03557 djn.fs = djo.fs; 03558 INIT_BUF(djo); 03559 res = follow_path(&djo, path_old); /* Check old object */ 03560 if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT)) 03561 res = FR_INVALID_NAME; 03562 #if _FS_LOCK 03563 if (res == FR_OK) res = chk_lock(&djo, 2); 03564 #endif 03565 if (res == FR_OK) { /* Old object is found */ 03566 if (!djo.dir) { /* Is root dir? */ 03567 res = FR_NO_FILE; 03568 } else { 03569 mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */ 03570 mem_cpy(&djn, &djo, sizeof (FATFS_DIR)); /* Check new object */ 03571 res = follow_path(&djn, path_new); 03572 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ 03573 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */ 03574 /* Start critical section that an interruption or error can cause cross-link */ 03575 res = dir_register(&djn); /* Register the new entry */ 03576 if (res == FR_OK) { 03577 dir = djn.dir; /* Copy object information except for name */ 03578 mem_cpy(dir+13, buf+2, 19); 03579 dir[DIR_Attr] = buf[0] | AM_ARC; 03580 djo.fs->wflag = 1; 03581 if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */ 03582 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir)); 03583 if (!dw) { 03584 res = FR_INT_ERR; 03585 } else { 03586 res = move_window(djo.fs, dw); 03587 dir = djo.fs->win+SZ_DIR; /* .. entry */ 03588 if (res == FR_OK && dir[1] == '.') { 03589 dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust; 03590 st_clust(dir, dw); 03591 djo.fs->wflag = 1; 03592 } 03593 } 03594 } 03595 if (res == FR_OK) { 03596 res = dir_remove(&djo); /* Remove old entry */ 03597 if (res == FR_OK) 03598 res = sync(djo.fs); 03599 } 03600 } 03601 /* End critical section */ 03602 } 03603 } 03604 } 03605 FREE_BUF(); 03606 } 03607 LEAVE_FF(djo.fs, res); 03608 } 03609 03610 #endif /* !_FS_READONLY */ 03611 #endif /* _FS_MINIMIZE == 0 */ 03612 #endif /* _FS_MINIMIZE <= 1 */ 03613 #endif /* _FS_MINIMIZE <= 2 */ 03614 03615 03616 03617 /*-----------------------------------------------------------------------*/ 03618 /* Forward data to the stream directly (available on only tiny cfg) */ 03619 /*-----------------------------------------------------------------------*/ 03620 #if _USE_FORWARD && _FS_TINY 03621 03622 FRESULT f_forward ( 03623 FIL *fp, /* Pointer to the file object */ 03624 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 03625 UINT btr, /* Number of bytes to forward */ 03626 UINT *bf /* Pointer to number of bytes forwarded */ 03627 ) 03628 { 03629 FRESULT res; 03630 DWORD remain, clst, sect; 03631 UINT rcnt; 03632 BYTE csect; 03633 03634 03635 *bf = 0; /* Clear transfer byte counter */ 03636 03637 if (!fp) return FR_INVALID_OBJECT; 03638 03639 res = validate(fp); /* Check validity of the object */ 03640 if (res != FR_OK) LEAVE_FF(fp->fs, res); 03641 if (fp->flag & FA__ERROR) /* Check error flag */ 03642 LEAVE_FF(fp->fs, FR_INT_ERR); 03643 if (!(fp->flag & FA_READ)) /* Check access mode */ 03644 LEAVE_FF(fp->fs, FR_DENIED); 03645 03646 remain = fp->fsize - fp->fptr; 03647 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 03648 03649 for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ 03650 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) { 03651 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 03652 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 03653 if (!csect) { /* On the cluster boundary? */ 03654 clst = (fp->fptr == 0) ? /* On the top of the file? */ 03655 fp->sclust : get_fat(fp->fs, fp->clust); 03656 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); 03657 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03658 fp->clust = clst; /* Update current cluster */ 03659 } 03660 } 03661 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ 03662 if (!sect) ABORT(fp->fs, FR_INT_ERR); 03663 sect += csect; 03664 if (move_window(fp->fs, sect)) /* Move sector window */ 03665 ABORT(fp->fs, FR_DISK_ERR); 03666 fp->dsect = sect; 03667 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ 03668 if (rcnt > btr) rcnt = btr; 03669 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); 03670 if (!rcnt) ABORT(fp->fs, FR_INT_ERR); 03671 } 03672 03673 LEAVE_FF(fp->fs, FR_OK); 03674 } 03675 #endif /* _USE_FORWARD */ 03676 03677 03678 03679 #if _USE_MKFS && !_FS_READONLY 03680 /*-----------------------------------------------------------------------*/ 03681 /* Create File System on the Drive */ 03682 /*-----------------------------------------------------------------------*/ 03683 #define N_ROOTDIR 512 /* Number of root dir entries for FAT12/16 */ 03684 #define N_FATS 1 /* Number of FAT copies (1 or 2) */ 03685 03686 03687 FRESULT f_mkfs ( 03688 BYTE drv, /* Logical drive number */ 03689 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ 03690 UINT au /* Allocation unit size [bytes] */ 03691 ) 03692 { 03693 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; 03694 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; 03695 BYTE fmt, md, sys, *tbl, pdrv, part; 03696 DWORD n_clst, vs, n, wsect; 03697 UINT i; 03698 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */ 03699 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ 03700 FATFS *fs; 03701 DSTATUS stat; 03702 03703 03704 /* Check mounted drive and clear work area */ 03705 if (drv >= _VOLUMES) return FR_INVALID_DRIVE; 03706 if (sfd > 1) return FR_INVALID_PARAMETER; 03707 if (au & (au - 1)) return FR_INVALID_PARAMETER; 03708 fs = FatFs[drv]; 03709 if (!fs) return FR_NOT_ENABLED; 03710 fs->fs_type = 0; 03711 pdrv = LD2PD(drv); /* Physical drive */ 03712 part = LD2PT(drv); /* Partition (0:auto detect, 1-4:get from partition table)*/ 03713 03714 /* Get disk statics */ 03715 stat = disk_initialize(pdrv); 03716 if (stat & STA_NOINIT) return FR_NOT_READY; 03717 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 03718 #if _MAX_SS != 512 /* Get disk sector size */ 03719 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS) 03720 return FR_DISK_ERR; 03721 #endif 03722 if (_MULTI_PARTITION && part) { 03723 /* Get partition information from partition table in the MBR */ 03724 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; 03725 if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; 03726 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; 03727 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */ 03728 b_vol = LD_DWORD(tbl+8); /* Volume start sector */ 03729 n_vol = LD_DWORD(tbl+12); /* Volume size */ 03730 } else { 03731 /* Create a partition in this function */ 03732 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) 03733 return FR_DISK_ERR; 03734 b_vol = (sfd) ? 0 : 63; /* Volume start sector */ 03735 n_vol -= b_vol; /* Volume size */ 03736 } 03737 03738 if (!au) { /* AU auto selection */ 03739 vs = n_vol / (2000 / (SS(fs) / 512)); 03740 for (i = 0; vs < vst[i]; i++) ; 03741 au = cst[i]; 03742 } 03743 au /= SS(fs); /* Number of sectors per cluster */ 03744 if (au == 0) au = 1; 03745 if (au > 128) au = 128; 03746 03747 /* Pre-compute number of clusters and FAT sub-type */ 03748 n_clst = n_vol / au; 03749 fmt = FS_FAT12; 03750 if (n_clst >= MIN_FAT16) fmt = FS_FAT16; 03751 if (n_clst >= MIN_FAT32) fmt = FS_FAT32; 03752 03753 /* Determine offset and size of FAT structure */ 03754 if (fmt == FS_FAT32) { 03755 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); 03756 n_rsv = 32; 03757 n_dir = 0; 03758 } else { 03759 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; 03760 n_fat = (n_fat + SS(fs) - 1) / SS(fs); 03761 n_rsv = 1; 03762 n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs); 03763 } 03764 b_fat = b_vol + n_rsv; /* FAT area start sector */ 03765 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ 03766 b_data = b_dir + n_dir; /* Data area start sector */ 03767 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ 03768 03769 /* Align data start sector to erase block boundary (for flash memory media) */ 03770 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; 03771 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ 03772 n = (n - b_data) / N_FATS; 03773 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ 03774 n_rsv += n; 03775 b_fat += n; 03776 } else { /* FAT12/16: Expand FAT size */ 03777 n_fat += n; 03778 } 03779 03780 /* Determine number of clusters and final check of validity of the FAT sub-type */ 03781 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; 03782 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) 03783 || (fmt == FS_FAT32 && n_clst < MIN_FAT32)) 03784 return FR_MKFS_ABORTED; 03785 03786 switch (fmt) { /* Determine system ID for partition table */ 03787 case FS_FAT12: 03788 sys = 0x01; 03789 break; 03790 case FS_FAT16: 03791 sys = (n_vol < 0x10000) ? 0x04 : 0x06; 03792 break; 03793 default: 03794 sys = 0x0C; 03795 } 03796 03797 if (_MULTI_PARTITION && part) { 03798 /* Update system ID in the partition table */ 03799 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; 03800 tbl[4] = sys; 03801 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; 03802 md = 0xF8; 03803 } else { 03804 if (sfd) { /* No partition table (SFD) */ 03805 md = 0xF0; 03806 } else { /* Create partition table (FDISK) */ 03807 mem_set(fs->win, 0, SS(fs)); 03808 tbl = fs->win+MBR_Table; /* Create partition table for single partition in the drive */ 03809 tbl[1] = 1; /* Partition start head */ 03810 tbl[2] = 1; /* Partition start sector */ 03811 tbl[3] = 0; /* Partition start cylinder */ 03812 tbl[4] = sys; /* System type */ 03813 tbl[5] = 254; /* Partition end head */ 03814 n = (b_vol + n_vol) / 63 / 255; 03815 tbl[6] = (BYTE)((n >> 2) | 63); /* Partition end sector */ 03816 tbl[7] = (BYTE)n; /* End cylinder */ 03817 ST_DWORD(tbl+8, 63); /* Partition start in LBA */ 03818 ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */ 03819 ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */ 03820 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR sector */ 03821 return FR_DISK_ERR; 03822 md = 0xF8; 03823 } 03824 } 03825 03826 /* Create BPB in the VBR */ 03827 tbl = fs->win; /* Clear sector */ 03828 mem_set(tbl, 0, SS(fs)); 03829 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ 03830 i = SS(fs); /* Sector size */ 03831 ST_WORD(tbl+BPB_BytsPerSec, i); 03832 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ 03833 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ 03834 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ 03835 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */ 03836 ST_WORD(tbl+BPB_RootEntCnt, i); 03837 if (n_vol < 0x10000) { /* Number of total sectors */ 03838 ST_WORD(tbl+BPB_TotSec16, n_vol); 03839 } else { 03840 ST_DWORD(tbl+BPB_TotSec32, n_vol); 03841 } 03842 tbl[BPB_Media] = md; /* Media descriptor */ 03843 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */ 03844 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */ 03845 ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */ 03846 n = get_fattime(); /* Use current time as VSN */ 03847 if (fmt == FS_FAT32) { 03848 ST_DWORD(tbl+BS_VolID32, n); /* VSN */ 03849 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */ 03850 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */ 03851 ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */ 03852 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */ 03853 tbl[BS_DrvNum32] = 0x80; /* Drive number */ 03854 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ 03855 mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 03856 } else { 03857 ST_DWORD(tbl+BS_VolID, n); /* VSN */ 03858 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */ 03859 tbl[BS_DrvNum] = 0x80; /* Drive number */ 03860 tbl[BS_BootSig] = 0x29; /* Extended boot signature */ 03861 mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 03862 } 03863 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ 03864 if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */ 03865 return FR_DISK_ERR; 03866 if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */ 03867 disk_write(pdrv, tbl, b_vol + 6, 1); 03868 03869 /* Initialize FAT area */ 03870 wsect = b_fat; 03871 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ 03872 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ 03873 n = md; /* Media descriptor byte */ 03874 if (fmt != FS_FAT32) { 03875 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; 03876 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */ 03877 } else { 03878 n |= 0xFFFFFF00; 03879 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */ 03880 ST_DWORD(tbl+4, 0xFFFFFFFF); 03881 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */ 03882 } 03883 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 03884 return FR_DISK_ERR; 03885 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ 03886 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ 03887 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 03888 return FR_DISK_ERR; 03889 } 03890 } 03891 03892 /* Initialize root directory */ 03893 i = (fmt == FS_FAT32) ? au : n_dir; 03894 do { 03895 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 03896 return FR_DISK_ERR; 03897 } while (--i); 03898 03899 #if _USE_ERASE /* Erase data area if needed */ 03900 { 03901 DWORD eb[2]; 03902 03903 eb[0] = wsect; 03904 eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; 03905 disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb); 03906 } 03907 #endif 03908 03909 /* Create FSInfo if needed */ 03910 if (fmt == FS_FAT32) { 03911 ST_DWORD(tbl+FSI_LeadSig, 0x41615252); 03912 ST_DWORD(tbl+FSI_StrucSig, 0x61417272); 03913 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 03914 ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */ 03915 ST_WORD(tbl+BS_55AA, 0xAA55); 03916 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */ 03917 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */ 03918 } 03919 03920 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; 03921 } 03922 03923 03924 #if _MULTI_PARTITION == 2 03925 /*-----------------------------------------------------------------------*/ 03926 /* Divide Physical Drive */ 03927 /*-----------------------------------------------------------------------*/ 03928 03929 FRESULT f_fdisk ( 03930 BYTE pdrv, /* Physical drive number */ 03931 const DWORD szt[], /* Pointer to the size table for each partitions */ 03932 void* work /* Pointer to the working buffer */ 03933 ) 03934 { 03935 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; 03936 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work; 03937 DSTATUS stat; 03938 DWORD sz_disk, sz_part, s_part; 03939 03940 03941 stat = disk_initialize(pdrv); 03942 if (stat & STA_NOINIT) return FR_NOT_READY; 03943 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 03944 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; 03945 03946 /* Determine CHS in the table regardless of the drive geometry */ 03947 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; 03948 if (n == 256) n--; 03949 e_hd = n - 1; 03950 sz_cyl = 63 * n; 03951 tot_cyl = sz_disk / sz_cyl; 03952 03953 /* Create partition table */ 03954 mem_set(buf, 0, _MAX_SS); 03955 p = buf + MBR_Table; 03956 b_cyl = 0; 03957 for (i = 0; i < 4; i++, p += SZ_PTE) { 03958 p_cyl = (szt[i] <= 100) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; 03959 if (!p_cyl) continue; 03960 s_part = (DWORD)sz_cyl * b_cyl; 03961 sz_part = (DWORD)sz_cyl * p_cyl; 03962 if (i == 0) { /* Exclude first track of cylinder 0 */ 03963 s_hd = 1; 03964 s_part += 63; 03965 sz_part -= 63; 03966 } else { 03967 s_hd = 0; 03968 } 03969 e_cyl = b_cyl + p_cyl - 1; 03970 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER; 03971 03972 /* Set partition table */ 03973 p[1] = s_hd; /* Start head */ 03974 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */ 03975 p[3] = (BYTE)b_cyl; /* Start cylinder */ 03976 p[4] = 0x06; /* System type (temporary setting) */ 03977 p[5] = e_hd; /* End head */ 03978 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */ 03979 p[7] = (BYTE)e_cyl; /* End cylinder */ 03980 ST_DWORD(p + 8, s_part); /* Start sector in LBA */ 03981 ST_DWORD(p + 12, sz_part); /* Partition size */ 03982 03983 /* Next partition */ 03984 b_cyl += p_cyl; 03985 } 03986 ST_WORD(p, 0xAA55); 03987 03988 /* Write it to the MBR */ 03989 return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK; 03990 } 03991 03992 03993 #endif /* _MULTI_PARTITION == 2 */ 03994 #endif /* _USE_MKFS && !_FS_READONLY */ 03995 03996 03997 03998 03999 #if _USE_STRFUNC 04000 /*-----------------------------------------------------------------------*/ 04001 /* Get a string from the file */ 04002 /*-----------------------------------------------------------------------*/ 04003 TCHAR* f_gets ( 04004 TCHAR* buff, /* Pointer to the string buffer to read */ 04005 int len, /* Size of string buffer (characters) */ 04006 FIL* fil /* Pointer to the file object */ 04007 ) 04008 { 04009 int n = 0; 04010 TCHAR c, *p = buff; 04011 BYTE s[2]; 04012 UINT rc; 04013 04014 04015 while (n < len - 1) { /* Read bytes until buffer gets filled */ 04016 f_read(fil, s, 1, &rc); 04017 if (rc != 1) break; /* Break on EOF or error */ 04018 c = s[0]; 04019 #if _LFN_UNICODE /* Read a character in UTF-8 encoding */ 04020 if (c >= 0x80) { 04021 if (c < 0xC0) continue; /* Skip stray trailer */ 04022 if (c < 0xE0) { /* Two-byte sequence */ 04023 f_read(fil, s, 1, &rc); 04024 if (rc != 1) break; 04025 c = ((c & 0x1F) << 6) | (s[0] & 0x3F); 04026 if (c < 0x80) c = '?'; 04027 } else { 04028 if (c < 0xF0) { /* Three-byte sequence */ 04029 f_read(fil, s, 2, &rc); 04030 if (rc != 2) break; 04031 c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F); 04032 if (c < 0x800) c = '?'; 04033 } else { /* Reject four-byte sequence */ 04034 c = '?'; 04035 } 04036 } 04037 } 04038 #endif 04039 #if _USE_STRFUNC >= 2 04040 if (c == '\r') continue; /* Strip '\r' */ 04041 #endif 04042 *p++ = c; 04043 n++; 04044 if (c == '\n') break; /* Break on EOL */ 04045 } 04046 *p = 0; 04047 return n ? buff : 0; /* When no data read (eof or error), return with error. */ 04048 } 04049 04050 04051 04052 #if !_FS_READONLY 04053 #include <stdarg.h> 04054 /*-----------------------------------------------------------------------*/ 04055 /* Put a character to the file */ 04056 /*-----------------------------------------------------------------------*/ 04057 int f_putc ( 04058 TCHAR c, /* A character to be output */ 04059 FIL* fil /* Pointer to the file object */ 04060 ) 04061 { 04062 UINT bw, btw; 04063 BYTE s[3]; 04064 04065 04066 #if _USE_STRFUNC >= 2 04067 if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */ 04068 #endif 04069 04070 #if _LFN_UNICODE /* Write the character in UTF-8 encoding */ 04071 if (c < 0x80) { /* 7-bit */ 04072 s[0] = (BYTE)c; 04073 btw = 1; 04074 } else { 04075 if (c < 0x800) { /* 11-bit */ 04076 s[0] = (BYTE)(0xC0 | (c >> 6)); 04077 s[1] = (BYTE)(0x80 | (c & 0x3F)); 04078 btw = 2; 04079 } else { /* 16-bit */ 04080 s[0] = (BYTE)(0xE0 | (c >> 12)); 04081 s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F)); 04082 s[2] = (BYTE)(0x80 | (c & 0x3F)); 04083 btw = 3; 04084 } 04085 } 04086 #else /* Write the character without conversion */ 04087 s[0] = (BYTE)c; 04088 btw = 1; 04089 #endif 04090 f_write(fil, s, btw, &bw); /* Write the char to the file */ 04091 return (bw == btw) ? 1 : EOF; /* Return the result */ 04092 } 04093 04094 04095 04096 04097 /*-----------------------------------------------------------------------*/ 04098 /* Put a string to the file */ 04099 /*-----------------------------------------------------------------------*/ 04100 int f_puts ( 04101 const TCHAR* str, /* Pointer to the string to be output */ 04102 FIL* fil /* Pointer to the file object */ 04103 ) 04104 { 04105 int n; 04106 04107 04108 for (n = 0; *str; str++, n++) { 04109 if (f_putc(*str, fil) == EOF) return EOF; 04110 } 04111 return n; 04112 } 04113 04114 04115 04116 04117 /*-----------------------------------------------------------------------*/ 04118 /* Put a formatted string to the file */ 04119 /*-----------------------------------------------------------------------*/ 04120 int f_printf ( 04121 FIL* fil, /* Pointer to the file object */ 04122 const TCHAR* str, /* Pointer to the format string */ 04123 ... /* Optional arguments... */ 04124 ) 04125 { 04126 va_list arp; 04127 BYTE f, r; 04128 UINT i, j, w; 04129 ULONG v; 04130 TCHAR c, d, s[16], *p; 04131 int res, chc, cc; 04132 04133 04134 va_start(arp, str); 04135 04136 for (cc = res = 0; cc != EOF; res += cc) { 04137 c = *str++; 04138 if (c == 0) break; /* End of string */ 04139 if (c != '%') { /* Non escape character */ 04140 cc = f_putc(c, fil); 04141 if (cc != EOF) cc = 1; 04142 continue; 04143 } 04144 w = f = 0; 04145 c = *str++; 04146 if (c == '0') { /* Flag: '0' padding */ 04147 f = 1; 04148 c = *str++; 04149 } else { 04150 if (c == '-') { /* Flag: left justified */ 04151 f = 2; 04152 c = *str++; 04153 } 04154 } 04155 while (IsDigit(c)) { /* Precision */ 04156 w = w * 10 + c - '0'; 04157 c = *str++; 04158 } 04159 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ 04160 f |= 4; 04161 c = *str++; 04162 } 04163 if (!c) break; 04164 d = c; 04165 if (IsLower(d)) d -= 0x20; 04166 switch (d) { /* Type is... */ 04167 case 'S' : /* String */ 04168 p = va_arg(arp, TCHAR*); 04169 for (j = 0; p[j]; j++) ; 04170 chc = 0; 04171 if (!(f & 2)) { 04172 while (j++ < w) chc += (cc = f_putc(' ', fil)); 04173 } 04174 chc += (cc = f_puts(p, fil)); 04175 while (j++ < w) chc += (cc = f_putc(' ', fil)); 04176 if (cc != EOF) cc = chc; 04177 continue; 04178 case 'C' : /* Character */ 04179 cc = f_putc((TCHAR)va_arg(arp, int), fil); 04180 continue; 04181 case 'B' : /* Binary */ 04182 r = 2; 04183 break; 04184 case 'O' : /* Octal */ 04185 r = 8; 04186 break; 04187 case 'D' : /* Signed decimal */ 04188 case 'U' : /* Unsigned decimal */ 04189 r = 10; 04190 break; 04191 case 'X' : /* Hexdecimal */ 04192 r = 16; 04193 break; 04194 default: /* Unknown type (pass-through) */ 04195 cc = f_putc(c, fil); 04196 continue; 04197 } 04198 04199 /* Get an argument and put it in numeral */ 04200 v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int)); 04201 if (d == 'D' && (v & 0x80000000)) { 04202 v = 0 - v; 04203 f |= 8; 04204 } 04205 i = 0; 04206 do { 04207 d = (TCHAR)(v % r); 04208 v /= r; 04209 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 04210 s[i++] = d + '0'; 04211 } while (v && i < sizeof s / sizeof s[0]); 04212 if (f & 8) s[i++] = '-'; 04213 j = i; 04214 d = (f & 1) ? '0' : ' '; 04215 res = 0; 04216 while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil)); 04217 do res += (cc = f_putc(s[--i], fil)); 04218 while(i); 04219 while (j++ < w) res += (cc = f_putc(' ', fil)); 04220 if (cc != EOF) cc = res; 04221 } 04222 04223 va_end(arp); 04224 return (cc == EOF) ? cc : res; 04225 } 04226 04227 #endif /* !_FS_READONLY */ 04228 #endif /* _USE_STRFUNC */
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