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1115 lines
42 KiB
1115 lines
42 KiB
/*----------------------------------------------------------------------------/
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/ Petit FatFs - FAT file system module R0.02a (C)ChaN, 2010
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/-----------------------------------------------------------------------------/
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/ Petit FatFs module is an open source software to implement FAT file system to
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/ small embedded systems. This is a free software and is opened for education,
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/ research and commercial developments under license policy of following trems.
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/
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/ Copyright (C) 2010, ChaN, all right reserved.
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/
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/ * The Petit FatFs module is a free software and there is NO WARRANTY.
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/ * No restriction on use. You can use, modify and redistribute it for
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/ personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
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/ * Redistributions of source code must retain the above copyright notice.
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/
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/-----------------------------------------------------------------------------/
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/ Jun 15,'09 R0.01a First release. (Branched from FatFs R0.07b.)
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/
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/ Dec 14,'09 R0.02 Added multiple code page support.
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/ Added write funciton.
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/ Changed stream read mode interface.
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/ Dec 07,'10 R0.02a Added some configuration options.
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/ Fixed fails to open objects with DBCS character.
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/----------------------------------------------------------------------------*/
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#include "pff.h" /* Petit FatFs configurations and declarations */
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#include "diskio.h" /* Declarations of low level disk I/O functions */
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/*--------------------------------------------------------------------------
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Module Private Definitions
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---------------------------------------------------------------------------*/
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#if _FS_FAT32
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#define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO))
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#else
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#define LD_CLUST(dir) LD_WORD(dir+DIR_FstClusLO)
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#endif
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/*--------------------------------------------------------*/
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/* DBCS code ranges and SBCS extend char conversion table */
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#if _CODE_PAGE == 932 /* Japanese Shift-JIS */
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#define _DF1S 0x81 /* DBC 1st byte range 1 start */
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#define _DF1E 0x9F /* DBC 1st byte range 1 end */
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#define _DF2S 0xE0 /* DBC 1st byte range 2 start */
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#define _DF2E 0xFC /* DBC 1st byte range 2 end */
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#define _DS1S 0x40 /* DBC 2nd byte range 1 start */
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#define _DS1E 0x7E /* DBC 2nd byte range 1 end */
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#define _DS2S 0x80 /* DBC 2nd byte range 2 start */
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#define _DS2E 0xFC /* DBC 2nd byte range 2 end */
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#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
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#define _DF1S 0x81
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#define _DF1E 0xFE
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#define _DS1S 0x40
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#define _DS1E 0x7E
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#define _DS2S 0x80
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#define _DS2E 0xFE
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#elif _CODE_PAGE == 949 /* Korean */
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#define _DF1S 0x81
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#define _DF1E 0xFE
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#define _DS1S 0x41
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#define _DS1E 0x5A
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#define _DS2S 0x61
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#define _DS2E 0x7A
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#define _DS3S 0x81
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#define _DS3E 0xFE
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#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
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#define _DF1S 0x81
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#define _DF1E 0xFE
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#define _DS1S 0x40
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#define _DS1E 0x7E
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#define _DS2S 0xA1
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#define _DS2E 0xFE
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#elif _CODE_PAGE == 437 /* U.S. (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#elif _CODE_PAGE == 720 /* Arabic (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#elif _CODE_PAGE == 737 /* Greek (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#elif _CODE_PAGE == 775 /* Baltic (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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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}
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#elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
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#elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
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#elif _CODE_PAGE == 857 /* Turkish (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#elif _CODE_PAGE == 862 /* Hebrew (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
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#elif _CODE_PAGE == 866 /* Russian (OEM) */
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#define _DF1S 0
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#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, \
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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, \
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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, \
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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}
|
|
|
|
#elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
|
|
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
|
|
|
|
#elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
|
|
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
|
|
|
|
#elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
|
|
0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF}
|
|
|
|
#elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \
|
|
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
|
|
|
|
#elif _CODE_PAGE == 1253 /* Greek (Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
|
|
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \
|
|
0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF}
|
|
|
|
#elif _CODE_PAGE == 1254 /* Turkish (Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \
|
|
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
|
|
|
|
#elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
|
|
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
|
|
|
|
#elif _CODE_PAGE == 1256 /* Arabic (Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \
|
|
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF}
|
|
|
|
#elif _CODE_PAGE == 1257 /* Baltic (Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
|
|
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
|
|
|
|
#elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
|
|
#define _DF1S 0
|
|
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \
|
|
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
|
|
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F}
|
|
|
|
#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
|
|
#define _DF1S 0
|
|
|
|
#else
|
|
#error Unknown code page
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Character code support macros */
|
|
|
|
#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
|
|
#define IsLower(c) (((c)>='a')&&((c)<='z'))
|
|
|
|
#if _DF1S /* DBCS configuration */
|
|
|
|
#ifdef _DF2S /* Two 1st byte areas */
|
|
#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
|
|
#else /* One 1st byte area */
|
|
#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
|
|
#endif
|
|
|
|
#ifdef _DS3S /* Three 2nd byte areas */
|
|
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
|
|
#else /* Two 2nd byte areas */
|
|
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
|
|
#endif
|
|
|
|
#else /* SBCS configuration */
|
|
|
|
#define IsDBCS1(c) 0
|
|
#define IsDBCS2(c) 0
|
|
|
|
#endif /* _DF1S */
|
|
|
|
|
|
/* FatFs refers the members in the FAT structures with byte offset instead
|
|
/ of structure member because there are incompatibility of the packing option
|
|
/ between various compilers. */
|
|
|
|
#define BS_jmpBoot 0
|
|
#define BS_OEMName 3
|
|
#define BPB_BytsPerSec 11
|
|
#define BPB_SecPerClus 13
|
|
#define BPB_RsvdSecCnt 14
|
|
#define BPB_NumFATs 16
|
|
#define BPB_RootEntCnt 17
|
|
#define BPB_TotSec16 19
|
|
#define BPB_Media 21
|
|
#define BPB_FATSz16 22
|
|
#define BPB_SecPerTrk 24
|
|
#define BPB_NumHeads 26
|
|
#define BPB_HiddSec 28
|
|
#define BPB_TotSec32 32
|
|
#define BS_55AA 510
|
|
|
|
#define BS_DrvNum 36
|
|
#define BS_BootSig 38
|
|
#define BS_VolID 39
|
|
#define BS_VolLab 43
|
|
#define BS_FilSysType 54
|
|
|
|
#define BPB_FATSz32 36
|
|
#define BPB_ExtFlags 40
|
|
#define BPB_FSVer 42
|
|
#define BPB_RootClus 44
|
|
#define BPB_FSInfo 48
|
|
#define BPB_BkBootSec 50
|
|
#define BS_DrvNum32 64
|
|
#define BS_BootSig32 66
|
|
#define BS_VolID32 67
|
|
#define BS_VolLab32 71
|
|
#define BS_FilSysType32 82
|
|
|
|
#define MBR_Table 446
|
|
|
|
#define DIR_Name 0
|
|
#define DIR_Attr 11
|
|
#define DIR_NTres 12
|
|
#define DIR_CrtTime 14
|
|
#define DIR_CrtDate 16
|
|
#define DIR_FstClusHI 20
|
|
#define DIR_WrtTime 22
|
|
#define DIR_WrtDate 24
|
|
#define DIR_FstClusLO 26
|
|
#define DIR_FileSize 28
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------------------
|
|
|
|
Private Functions
|
|
|
|
---------------------------------------------------------------------------*/
|
|
|
|
|
|
static
|
|
FATFS *FatFs; /* Pointer to the file system object (logical drive) */
|
|
|
|
|
|
/* Fill memory */
|
|
static
|
|
void mem_set (void* dst, int val, int cnt) {
|
|
char *d = (char*)dst;
|
|
while (cnt--) *d++ = (char)val;
|
|
}
|
|
|
|
/* Compare memory to memory */
|
|
static
|
|
int mem_cmp (const void* dst, const void* src, int cnt) {
|
|
const char *d = (const char *)dst, *s = (const char *)src;
|
|
int r = 0;
|
|
while (cnt-- && (r = *d++ - *s++) == 0) ;
|
|
return r;
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* FAT access - Read value of a FAT entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
CLUST get_fat ( /* 1:IO error, Else:Cluster status */
|
|
CLUST clst /* Cluster# to get the link information */
|
|
)
|
|
{
|
|
WORD wc, bc, ofs;
|
|
BYTE buf[4];
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
if (clst < 2 || clst >= fs->n_fatent) /* Range check */
|
|
return 1;
|
|
|
|
switch (fs->fs_type) {
|
|
#if _FS_FAT12
|
|
case FS_FAT12 :
|
|
bc = (WORD)clst; bc += bc / 2;
|
|
ofs = bc % 512; bc /= 512;
|
|
if (ofs != 511) {
|
|
if (disk_readp(buf, fs->fatbase + bc, ofs, 2)) break;
|
|
} else {
|
|
if (disk_readp(buf, fs->fatbase + bc, 511, 1)) break;
|
|
if (disk_readp(buf+1, fs->fatbase + bc + 1, 0, 1)) break;
|
|
}
|
|
wc = LD_WORD(buf);
|
|
return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
|
|
#endif
|
|
case FS_FAT16 :
|
|
if (disk_readp(buf, fs->fatbase + clst / 256, (WORD)(((WORD)clst % 256) * 2), 2)) break;
|
|
return LD_WORD(buf);
|
|
#if _FS_FAT32
|
|
case FS_FAT32 :
|
|
if (disk_readp(buf, fs->fatbase + clst / 128, (WORD)(((WORD)clst % 128) * 4), 4)) break;
|
|
return LD_DWORD(buf) & 0x0FFFFFFF;
|
|
#endif
|
|
}
|
|
|
|
return 1; /* An error occured at the disk I/O layer */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get sector# from cluster# */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
|
|
CLUST clst /* Cluster# to be converted */
|
|
)
|
|
{
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
clst -= 2;
|
|
if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */
|
|
return (DWORD)clst * fs->csize + fs->database;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Rewind directory index */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_rewind (
|
|
DIR *dj /* Pointer to directory object */
|
|
)
|
|
{
|
|
CLUST clst;
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
dj->index = 0;
|
|
clst = dj->sclust;
|
|
if (clst == 1 || clst >= fs->n_fatent) /* Check start cluster range */
|
|
return FR_DISK_ERR;
|
|
if (_FS_FAT32 && !clst && fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
|
|
clst = (CLUST)fs->dirbase;
|
|
dj->clust = clst; /* Current cluster */
|
|
dj->sect = clst ? clust2sect(clst) : fs->dirbase; /* Current sector */
|
|
|
|
return FR_OK; /* Seek succeeded */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Move directory index next */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table */
|
|
DIR *dj /* Pointer to directory object */
|
|
)
|
|
{
|
|
CLUST clst;
|
|
WORD i;
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
i = dj->index + 1;
|
|
if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
|
|
return FR_NO_FILE;
|
|
|
|
if (!(i % 16)) { /* Sector changed? */
|
|
dj->sect++; /* Next sector */
|
|
|
|
if (dj->clust == 0) { /* Static table */
|
|
if (i >= fs->n_rootdir) /* Report EOT when end of table */
|
|
return FR_NO_FILE;
|
|
}
|
|
else { /* Dynamic table */
|
|
if (((i / 16) & (fs->csize-1)) == 0) { /* Cluster changed? */
|
|
clst = get_fat(dj->clust); /* Get next cluster */
|
|
if (clst <= 1) return FR_DISK_ERR;
|
|
if (clst >= fs->n_fatent) /* When it reached end of dynamic table */
|
|
return FR_NO_FILE; /* Report EOT */
|
|
dj->clust = clst; /* Initialize data for new cluster */
|
|
dj->sect = clust2sect(clst);
|
|
}
|
|
}
|
|
}
|
|
|
|
dj->index = i;
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Directory handling - Find an object in the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT dir_find (
|
|
DIR *dj, /* Pointer to the directory object linked to the file name */
|
|
BYTE *dir /* 32-byte working buffer */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE c;
|
|
|
|
|
|
res = dir_rewind(dj); /* Rewind directory object */
|
|
if (res != FR_OK) return res;
|
|
|
|
do {
|
|
res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */
|
|
? FR_DISK_ERR : FR_OK;
|
|
if (res != FR_OK) break;
|
|
c = dir[DIR_Name]; /* First character */
|
|
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
|
|
if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
|
|
break;
|
|
res = dir_next(dj); /* Next entry */
|
|
} while (res == FR_OK);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read an object from the directory */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_DIR
|
|
static
|
|
FRESULT dir_read (
|
|
DIR *dj, /* Pointer to the directory object to store read object name */
|
|
BYTE *dir /* 32-byte working buffer */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE a, c;
|
|
|
|
|
|
res = FR_NO_FILE;
|
|
while (dj->sect) {
|
|
res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */
|
|
? FR_DISK_ERR : FR_OK;
|
|
if (res != FR_OK) break;
|
|
c = dir[DIR_Name];
|
|
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
|
|
a = dir[DIR_Attr] & AM_MASK;
|
|
if (c != 0xE5 && c != '.' && !(a & AM_VOL)) /* Is it a valid entry? */
|
|
break;
|
|
res = dir_next(dj); /* Next entry */
|
|
if (res != FR_OK) break;
|
|
}
|
|
|
|
if (res != FR_OK) dj->sect = 0;
|
|
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Pick a segment and create the object name in directory form */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
#ifdef _EXCVT
|
|
static const BYTE cvt[] = _EXCVT;
|
|
#endif
|
|
|
|
static
|
|
FRESULT create_name (
|
|
DIR *dj, /* Pointer to the directory object */
|
|
const char **path /* Pointer to pointer to the segment in the path string */
|
|
)
|
|
{
|
|
BYTE c, d, ni, si, i, *sfn;
|
|
const char *p;
|
|
|
|
/* Create file name in directory form */
|
|
sfn = dj->fn;
|
|
mem_set(sfn, ' ', 11);
|
|
si = i = 0; ni = 8;
|
|
p = *path;
|
|
for (;;) {
|
|
c = p[si++];
|
|
if (c <= ' ' || c == '/') break; /* Break on end of segment */
|
|
if (c == '.' || i >= ni) {
|
|
if (ni != 8 || c != '.') break;
|
|
i = 8; ni = 11;
|
|
continue;
|
|
}
|
|
#ifdef _EXCVT
|
|
if (c >= 0x80) /* To upper extended char (SBCS) */
|
|
c = cvt[c - 0x80];
|
|
#endif
|
|
if (IsDBCS1(c) && i < ni - 1) { /* DBC 1st byte? */
|
|
d = p[si++]; /* Get 2nd byte */
|
|
sfn[i++] = c;
|
|
sfn[i++] = d;
|
|
} else { /* Single byte code */
|
|
if (IsLower(c)) c -= 0x20; /* toupper */
|
|
sfn[i++] = c;
|
|
}
|
|
}
|
|
*path = &p[si]; /* Rerurn pointer to the next segment */
|
|
|
|
sfn[11] = (c <= ' ') ? 1 : 0; /* Set last segment flag if end of path */
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Get file information from directory entry */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_DIR
|
|
static
|
|
void get_fileinfo ( /* No return code */
|
|
DIR *dj, /* Pointer to the directory object */
|
|
BYTE *dir, /* 32-byte working buffer */
|
|
FILINFO *fno /* Pointer to store the file information */
|
|
)
|
|
{
|
|
BYTE i, c;
|
|
char *p;
|
|
|
|
|
|
p = fno->fname;
|
|
if (dj->sect) {
|
|
for (i = 0; i < 8; i++) { /* Copy file name body */
|
|
c = dir[i];
|
|
if (c == ' ') break;
|
|
if (c == 0x05) c = 0xE5;
|
|
*p++ = c;
|
|
}
|
|
if (dir[8] != ' ') { /* Copy file name extension */
|
|
*p++ = '.';
|
|
for (i = 8; i < 11; i++) {
|
|
c = dir[i];
|
|
if (c == ' ') break;
|
|
*p++ = c;
|
|
}
|
|
}
|
|
fno->fattrib = dir[DIR_Attr]; /* Attribute */
|
|
fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
|
|
fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
|
|
fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
|
|
}
|
|
*p = 0;
|
|
}
|
|
#endif /* _USE_DIR */
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Follow a file path */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
|
|
DIR *dj, /* Directory object to return last directory and found object */
|
|
BYTE *dir, /* 32-byte working buffer */
|
|
const char *path /* Full-path string to find a file or directory */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
|
|
|
|
while (*path == ' ') path++; /* Skip leading spaces */
|
|
if (*path == '/') path++; /* Strip heading separator */
|
|
dj->sclust = 0; /* Set start directory (always root dir) */
|
|
|
|
if ((BYTE)*path <= ' ') { /* Null path means the root directory */
|
|
res = dir_rewind(dj);
|
|
dir[0] = 0;
|
|
|
|
} else { /* Follow path */
|
|
for (;;) {
|
|
res = create_name(dj, &path); /* Get a segment */
|
|
if (res != FR_OK) break;
|
|
res = dir_find(dj, dir); /* Find it */
|
|
if (res != FR_OK) { /* Could not find the object */
|
|
if (res == FR_NO_FILE && !*(dj->fn+11))
|
|
res = FR_NO_PATH;
|
|
break;
|
|
}
|
|
if (*(dj->fn+11)) break; /* Last segment match. Function completed. */
|
|
if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
|
|
res = FR_NO_PATH; break;
|
|
}
|
|
dj->sclust = LD_CLUST(dir);
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Check a sector if it is an FAT boot record */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */
|
|
BYTE *buf, /* Working buffer */
|
|
DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
|
|
)
|
|
{
|
|
if (disk_readp(buf, sect, 510, 2)) /* Read the boot sector */
|
|
return 3;
|
|
if (LD_WORD(buf) != 0xAA55) /* Check record signature */
|
|
return 2;
|
|
|
|
if (!disk_readp(buf, sect, BS_FilSysType, 2) && LD_WORD(buf) == 0x4146) /* Check FAT12/16 */
|
|
return 0;
|
|
if (_FS_FAT32 && !disk_readp(buf, sect, BS_FilSysType32, 2) && LD_WORD(buf) == 0x4146) /* Check FAT32 */
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------------------
|
|
|
|
Public Functions
|
|
|
|
--------------------------------------------------------------------------*/
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Mount/Unmount a Locical Drive */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT pf_mount (
|
|
FATFS *fs /* Pointer to new file system object (NULL: Unmount) */
|
|
)
|
|
{
|
|
BYTE fmt, buf[36];
|
|
DWORD bsect, fsize, tsect, mclst;
|
|
|
|
|
|
FatFs = 0;
|
|
if (!fs) return FR_OK; /* Unregister fs object */
|
|
|
|
if (disk_initialize() & STA_NOINIT) /* Check if the drive is ready or not */
|
|
return FR_NOT_READY;
|
|
|
|
/* Search FAT partition on the drive */
|
|
bsect = 0;
|
|
fmt = check_fs(buf, bsect); /* Check sector 0 as an SFD format */
|
|
if (fmt == 1) { /* Not an FAT boot record, it may be FDISK format */
|
|
/* Check a partition listed in top of the partition table */
|
|
if (disk_readp(buf, bsect, MBR_Table, 16)) { /* 1st partition entry */
|
|
fmt = 3;
|
|
} else {
|
|
if (buf[4]) { /* Is the partition existing? */
|
|
bsect = LD_DWORD(&buf[8]); /* Partition offset in LBA */
|
|
fmt = check_fs(buf, bsect); /* Check the partition */
|
|
}
|
|
}
|
|
}
|
|
if (fmt == 3) return FR_DISK_ERR;
|
|
if (fmt) return FR_NO_FILESYSTEM; /* No valid FAT patition is found */
|
|
|
|
/* Initialize the file system object */
|
|
if (disk_readp(buf, bsect, 13, sizeof(buf))) return FR_DISK_ERR;
|
|
|
|
fsize = LD_WORD(buf+BPB_FATSz16-13); /* Number of sectors per FAT */
|
|
if (!fsize) fsize = LD_DWORD(buf+BPB_FATSz32-13);
|
|
|
|
fsize *= buf[BPB_NumFATs-13]; /* Number of sectors in FAT area */
|
|
fs->fatbase = bsect + LD_WORD(buf+BPB_RsvdSecCnt-13); /* FAT start sector (lba) */
|
|
fs->csize = buf[BPB_SecPerClus-13]; /* Number of sectors per cluster */
|
|
fs->n_rootdir = LD_WORD(buf+BPB_RootEntCnt-13); /* Nmuber of root directory entries */
|
|
tsect = LD_WORD(buf+BPB_TotSec16-13); /* Number of sectors on the file system */
|
|
if (!tsect) tsect = LD_DWORD(buf+BPB_TotSec32-13);
|
|
mclst = (tsect /* Last cluster# + 1 */
|
|
- LD_WORD(buf+BPB_RsvdSecCnt-13) - fsize - fs->n_rootdir / 16
|
|
) / fs->csize + 2;
|
|
fs->n_fatent = (CLUST)mclst;
|
|
|
|
fmt = FS_FAT16; /* Determine the FAT sub type */
|
|
if (mclst < 0xFF7) /* Number of clusters < 0xFF5 */
|
|
#if _FS_FAT12
|
|
fmt = FS_FAT12;
|
|
#else
|
|
return FR_NO_FILESYSTEM;
|
|
#endif
|
|
if (mclst >= 0xFFF7) /* Number of clusters >= 0xFFF5 */
|
|
#if _FS_FAT32
|
|
fmt = FS_FAT32;
|
|
#else
|
|
return FR_NO_FILESYSTEM;
|
|
#endif
|
|
|
|
fs->fs_type = fmt; /* FAT sub-type */
|
|
if (_FS_FAT32 && fmt == FS_FAT32)
|
|
fs->dirbase = LD_DWORD(buf+(BPB_RootClus-13)); /* Root directory start cluster */
|
|
else
|
|
fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */
|
|
fs->database = fs->fatbase + fsize + fs->n_rootdir / 16; /* Data start sector (lba) */
|
|
|
|
fs->flag = 0;
|
|
FatFs = fs;
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Open or Create a File */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT pf_open (
|
|
const char *path /* Pointer to the file name */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
DIR dj;
|
|
BYTE sp[12], dir[32];
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
if (!fs) /* Check file system */
|
|
return FR_NOT_ENABLED;
|
|
|
|
fs->flag = 0;
|
|
dj.fn = sp;
|
|
res = follow_path(&dj, dir, path); /* Follow the file path */
|
|
if (res != FR_OK) return res; /* Follow failed */
|
|
if (!dir[0] || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */
|
|
return FR_NO_FILE;
|
|
|
|
fs->org_clust = LD_CLUST(dir); /* File start cluster */
|
|
fs->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
|
|
fs->fptr = 0; /* File pointer */
|
|
fs->flag = FA_OPENED;
|
|
|
|
return FR_OK;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read File */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_READ
|
|
|
|
FRESULT pf_read (
|
|
void* buff, /* Pointer to the read buffer (NULL:Forward data to the stream)*/
|
|
WORD btr, /* Number of bytes to read */
|
|
WORD* br /* Pointer to number of bytes read */
|
|
)
|
|
{
|
|
DRESULT dr;
|
|
CLUST clst;
|
|
DWORD sect, remain;
|
|
WORD rcnt;
|
|
BYTE cs, *rbuff = buff;
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
*br = 0;
|
|
if (!fs) return FR_NOT_ENABLED; /* Check file system */
|
|
if (!(fs->flag & FA_OPENED)) /* Check if opened */
|
|
return FR_NOT_OPENED;
|
|
|
|
remain = fs->fsize - fs->fptr;
|
|
if (btr > remain) btr = (WORD)remain; /* Truncate btr by remaining bytes */
|
|
|
|
while (btr) { /* Repeat until all data transferred */
|
|
if ((fs->fptr % 512) == 0) { /* On the sector boundary? */
|
|
cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */
|
|
if (!cs) { /* On the cluster boundary? */
|
|
clst = (fs->fptr == 0) ? /* On the top of the file? */
|
|
fs->org_clust : get_fat(fs->curr_clust);
|
|
if (clst <= 1) goto fr_abort;
|
|
fs->curr_clust = clst; /* Update current cluster */
|
|
}
|
|
sect = clust2sect(fs->curr_clust); /* Get current sector */
|
|
if (!sect) goto fr_abort;
|
|
fs->dsect = sect + cs;
|
|
}
|
|
rcnt = (WORD)(512 - (fs->fptr % 512)); /* Get partial sector data from sector buffer */
|
|
if (rcnt > btr) rcnt = btr;
|
|
dr = disk_readp(!buff ? 0 : rbuff, fs->dsect, (WORD)(fs->fptr % 512), rcnt);
|
|
if (dr) goto fr_abort;
|
|
fs->fptr += rcnt; rbuff += rcnt; /* Update pointers and counters */
|
|
btr -= rcnt; *br += rcnt;
|
|
}
|
|
|
|
return FR_OK;
|
|
|
|
fr_abort:
|
|
fs->flag = 0;
|
|
return FR_DISK_ERR;
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Write File */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_WRITE
|
|
|
|
FRESULT pf_write (
|
|
const void* buff, /* Pointer to the data to be written */
|
|
WORD btw, /* Number of bytes to write (0:Finalize the current write operation) */
|
|
WORD* bw /* Pointer to number of bytes written */
|
|
)
|
|
{
|
|
CLUST clst;
|
|
DWORD sect, remain;
|
|
const BYTE *p = buff;
|
|
BYTE cs;
|
|
WORD wcnt;
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
*bw = 0;
|
|
if (!fs) return FR_NOT_ENABLED; /* Check file system */
|
|
if (!(fs->flag & FA_OPENED)) /* Check if opened */
|
|
return FR_NOT_OPENED;
|
|
|
|
if (!btw) { /* Finalize request */
|
|
if ((fs->flag & FA__WIP) && disk_writep(0, 0)) goto fw_abort;
|
|
fs->flag &= ~FA__WIP;
|
|
return FR_OK;
|
|
} else { /* Write data request */
|
|
if (!(fs->flag & FA__WIP)) /* Round-down fptr to the sector boundary */
|
|
fs->fptr &= 0xFFFFFE00;
|
|
}
|
|
remain = fs->fsize - fs->fptr;
|
|
if (btw > remain) btw = (WORD)remain; /* Truncate btw by remaining bytes */
|
|
|
|
while (btw) { /* Repeat until all data transferred */
|
|
if (((WORD)fs->fptr % 512) == 0) { /* On the sector boundary? */
|
|
cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */
|
|
if (!cs) { /* On the cluster boundary? */
|
|
clst = (fs->fptr == 0) ? /* On the top of the file? */
|
|
fs->org_clust : get_fat(fs->curr_clust);
|
|
if (clst <= 1) goto fw_abort;
|
|
fs->curr_clust = clst; /* Update current cluster */
|
|
}
|
|
sect = clust2sect(fs->curr_clust); /* Get current sector */
|
|
if (!sect) goto fw_abort;
|
|
fs->dsect = sect + cs;
|
|
if (disk_writep(0, fs->dsect)) goto fw_abort; /* Initiate a sector write operation */
|
|
fs->flag |= FA__WIP;
|
|
}
|
|
wcnt = 512 - ((WORD)fs->fptr % 512); /* Number of bytes to write to the sector */
|
|
if (wcnt > btw) wcnt = btw;
|
|
if (disk_writep(p, wcnt)) goto fw_abort; /* Send data to the sector */
|
|
fs->fptr += wcnt; p += wcnt; /* Update pointers and counters */
|
|
btw -= wcnt; *bw += wcnt;
|
|
if (((WORD)fs->fptr % 512) == 0) {
|
|
if (disk_writep(0, 0)) goto fw_abort; /* Finalize the currtent secter write operation */
|
|
fs->flag &= ~FA__WIP;
|
|
}
|
|
}
|
|
|
|
return FR_OK;
|
|
|
|
fw_abort:
|
|
fs->flag = 0;
|
|
return FR_DISK_ERR;
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Seek File R/W Pointer */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_LSEEK
|
|
|
|
FRESULT pf_lseek (
|
|
DWORD ofs /* File pointer from top of file */
|
|
)
|
|
{
|
|
CLUST clst;
|
|
DWORD bcs, sect, ifptr;
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
if (!fs) return FR_NOT_ENABLED; /* Check file system */
|
|
if (!(fs->flag & FA_OPENED)) /* Check if opened */
|
|
return FR_NOT_OPENED;
|
|
|
|
if (ofs > fs->fsize) ofs = fs->fsize; /* Clip offset with the file size */
|
|
ifptr = fs->fptr;
|
|
fs->fptr = 0;
|
|
if (ofs > 0) {
|
|
bcs = (DWORD)fs->csize * 512; /* Cluster size (byte) */
|
|
if (ifptr > 0 &&
|
|
(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
|
|
fs->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
|
|
ofs -= fs->fptr;
|
|
clst = fs->curr_clust;
|
|
} else { /* When seek to back cluster, */
|
|
clst = fs->org_clust; /* start from the first cluster */
|
|
fs->curr_clust = clst;
|
|
}
|
|
while (ofs > bcs) { /* Cluster following loop */
|
|
clst = get_fat(clst); /* Follow cluster chain */
|
|
if (clst <= 1 || clst >= fs->n_fatent) goto fe_abort;
|
|
fs->curr_clust = clst;
|
|
fs->fptr += bcs;
|
|
ofs -= bcs;
|
|
}
|
|
fs->fptr += ofs;
|
|
sect = clust2sect(clst); /* Current sector */
|
|
if (!sect) goto fe_abort;
|
|
fs->dsect = sect + (fs->fptr / 512 & (fs->csize - 1));
|
|
}
|
|
|
|
return FR_OK;
|
|
|
|
fe_abort:
|
|
fs->flag = 0;
|
|
return FR_DISK_ERR;
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Create a Directroy Object */
|
|
/*-----------------------------------------------------------------------*/
|
|
#if _USE_DIR
|
|
|
|
FRESULT pf_opendir (
|
|
DIR *dj, /* Pointer to directory object to create */
|
|
const char *path /* Pointer to the directory path */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE sp[12], dir[32];
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
if (!fs) { /* Check file system */
|
|
res = FR_NOT_ENABLED;
|
|
} else {
|
|
dj->fn = sp;
|
|
res = follow_path(dj, dir, path); /* Follow the path to the directory */
|
|
if (res == FR_OK) { /* Follow completed */
|
|
if (dir[0]) { /* It is not the root dir */
|
|
if (dir[DIR_Attr] & AM_DIR) /* The object is a directory */
|
|
dj->sclust = LD_CLUST(dir);
|
|
else /* The object is not a directory */
|
|
res = FR_NO_PATH;
|
|
}
|
|
if (res == FR_OK)
|
|
res = dir_rewind(dj); /* Rewind dir */
|
|
}
|
|
if (res == FR_NO_FILE) res = FR_NO_PATH;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Read Directory Entry in Sequense */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
FRESULT pf_readdir (
|
|
DIR *dj, /* Pointer to the open directory object */
|
|
FILINFO *fno /* Pointer to file information to return */
|
|
)
|
|
{
|
|
FRESULT res;
|
|
BYTE sp[12], dir[32];
|
|
FATFS *fs = FatFs;
|
|
|
|
|
|
if (!fs) { /* Check file system */
|
|
res = FR_NOT_ENABLED;
|
|
} else {
|
|
dj->fn = sp;
|
|
if (!fno) {
|
|
res = dir_rewind(dj);
|
|
} else {
|
|
res = dir_read(dj, dir);
|
|
if (res == FR_NO_FILE) {
|
|
dj->sect = 0;
|
|
res = FR_OK;
|
|
}
|
|
if (res == FR_OK) { /* A valid entry is found */
|
|
get_fileinfo(dj, dir, fno); /* Get the object information */
|
|
res = dir_next(dj); /* Increment index for next */
|
|
if (res == FR_NO_FILE) {
|
|
dj->sect = 0;
|
|
res = FR_OK;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
#endif /* _USE_DIR */
|
|
|