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/*----------------------------------------------------------------------------// Petit FatFs - FAT file system module R0.02a (C)ChaN, 2010/-----------------------------------------------------------------------------// Petit FatFs module is an open source software to implement FAT file system to/ small embedded systems. This is a free software and is opened for education,/ research and commercial developments under license policy of following trems.// Copyright (C) 2010, ChaN, all right reserved.// * The Petit FatFs module is a free software and there is NO WARRANTY./ * No restriction on use. You can use, modify and redistribute it for/ personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY./ * Redistributions of source code must retain the above copyright notice.//-----------------------------------------------------------------------------// Jun 15,'09 R0.01a First release. (Branched from FatFs R0.07b.)// Dec 14,'09 R0.02 Added multiple code page support./ Added write funciton./ Changed stream read mode interface./ Dec 07,'10 R0.02a Added some configuration options./ Fixed fails to open objects with DBCS character./----------------------------------------------------------------------------*/#include "pff.h" /* Petit FatFs configurations and declarations */#include "diskio.h" /* Declarations of low level disk I/O functions *//*--------------------------------------------------------------------------Module Private Definitions---------------------------------------------------------------------------*/#if _FS_FAT32#define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO))#else#define LD_CLUST(dir) LD_WORD(dir+DIR_FstClusLO)#endif/*--------------------------------------------------------*//* DBCS code ranges and SBCS extend char conversion table */#if _CODE_PAGE == 932 /* Japanese Shift-JIS */#define _DF1S 0x81 /* DBC 1st byte range 1 start */#define _DF1E 0x9F /* DBC 1st byte range 1 end */#define _DF2S 0xE0 /* DBC 1st byte range 2 start */#define _DF2E 0xFC /* DBC 1st byte range 2 end */#define _DS1S 0x40 /* DBC 2nd byte range 1 start */#define _DS1E 0x7E /* DBC 2nd byte range 1 end */#define _DS2S 0x80 /* DBC 2nd byte range 2 start */#define _DS2E 0xFC /* DBC 2nd byte range 2 end */#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */#define _DF1S 0x81#define _DF1E 0xFE#define _DS1S 0x40#define _DS1E 0x7E#define _DS2S 0x80#define _DS2E 0xFE#elif _CODE_PAGE == 949 /* Korean */#define _DF1S 0x81#define _DF1E 0xFE#define _DS1S 0x41#define _DS1E 0x5A#define _DS2S 0x61#define _DS2E 0x7A#define _DS3S 0x81#define _DS3E 0xFE#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */#define _DF1S 0x81#define _DF1E 0xFE#define _DS1S 0x40#define _DS1E 0x7E#define _DS2S 0xA1#define _DS2E 0xFE#elif _CODE_PAGE == 437 /* U.S. (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 720 /* Arabic (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 737 /* Greek (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 775 /* Baltic (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 852 /* Latin 2 (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}#elif _CODE_PAGE == 855 /* Cyrillic (OEM) */#define _DF1S 0#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 857 /* Turkish (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 862 /* Hebrew (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#elif _CODE_PAGE == 866 /* Russian (OEM) */#define _DF1S 0#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}#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---------------------------------------------------------------------------*/staticFATFS *FatFs; /* Pointer to the file system object (logical drive) *//* Fill memory */staticvoid mem_set (void* dst, int val, int cnt) {char *d = (char*)dst;while (cnt--) *d++ = (char)val;}/* Compare memory to memory */staticint 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 *//*-----------------------------------------------------------------------*/staticCLUST 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_FAT12case 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);#endifcase FS_FAT16 :if (disk_readp(buf, fs->fatbase + clst / 256, (WORD)(((WORD)clst % 256) * 2), 2)) break;return LD_WORD(buf);#if _FS_FAT32case 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# *//*-----------------------------------------------------------------------*/staticDWORD 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 *//*-----------------------------------------------------------------------*/staticFRESULT 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 *//*-----------------------------------------------------------------------*/staticFRESULT 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 *//*-----------------------------------------------------------------------*/staticFRESULT 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_DIRstaticFRESULT 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 _EXCVTstatic const BYTE cvt[] = _EXCVT;#endifstaticFRESULT 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 _EXCVTif (c >= 0x80) /* To upper extended char (SBCS) */c = cvt[c - 0x80];#endifif (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_DIRstaticvoid 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 *//*-----------------------------------------------------------------------*/staticFRESULT 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 *//*-----------------------------------------------------------------------*/staticBYTE 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_FAT12fmt = FS_FAT12;#elsereturn FR_NO_FILESYSTEM;#endifif (mclst >= 0xFFF7) /* Number of clusters >= 0xFFF5 */#if _FS_FAT32fmt = FS_FAT32;#elsereturn FR_NO_FILESYSTEM;#endiffs->fs_type = fmt; /* FAT sub-type */if (_FS_FAT32 && fmt == FS_FAT32)fs->dirbase = LD_DWORD(buf+(BPB_RootClus-13)); /* Root directory start cluster */elsefs->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_READFRESULT 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_WRITEFRESULT 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_LSEEKFRESULT 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_DIRFRESULT 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 */