1 | /*---------------------------------------------------------------------------/
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2 | / FatFs - FAT file system module include file R0.07a (C)ChaN, 2009
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3 | /----------------------------------------------------------------------------/
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4 | / FatFs module is an open source software to implement FAT file system to
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5 | / small embedded systems. This is a free software and is opened for education,
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6 | / research and commercial developments under license policy of following trems.
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7 | /
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8 | / Copyright (C) 2009, ChaN, all right reserved.
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9 | /
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10 | / * The FatFs module is a free software and there is NO WARRANTY.
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11 | / * No restriction on use. You can use, modify and redistribute it for
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12 | / personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
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13 | / * Redistributions of source code must retain the above copyright notice.
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14 | /----------------------------------------------------------------------------*/
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15 |
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16 | #include "integer.h"
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17 |
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18 | /*---------------------------------------------------------------------------/
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19 | / FatFs Configuration Options
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20 | /
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21 | / CAUTION! Do not forget to make clean the project after any changes to
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22 | / the configuration options.
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23 | /
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24 | /----------------------------------------------------------------------------*/
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25 | #ifndef _FATFS
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26 | #define _FATFS
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27 |
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28 | #define _WORD_ACCESS 0
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29 | /* The _WORD_ACCESS option defines which access method is used to the word
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30 | / data in the FAT structure.
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31 | /
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32 | / 0: Byte-by-byte access. Always compatible with all platforms.
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33 | / 1: Word access. Do not choose this unless following condition is met.
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34 | /
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35 | / When the byte order on the memory is big-endian or address miss-aligned
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36 | / word access results incorrect behavior, the _WORD_ACCESS must be set to 0.
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37 | / If it is not the case, the value can also be set to 1 to improve the
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38 | / performance and code efficiency. */
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39 |
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40 |
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41 | #define _FS_READONLY 0
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42 | /* Setting _FS_READONLY to 1 defines read only configuration. This removes
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43 | / writing functions, f_write, f_sync, f_unlink, f_mkdir, f_chmod, f_rename,
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44 | / f_truncate and useless f_getfree. */
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45 |
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46 |
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47 | #define _FS_MINIMIZE 0
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48 | /* The _FS_MINIMIZE option defines minimization level to remove some functions.
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49 | /
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50 | / 0: Full function.
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51 | / 1: f_stat, f_getfree, f_unlink, f_mkdir, f_chmod, f_truncate and f_rename
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52 | / are removed.
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53 | / 2: f_opendir and f_readdir are removed in addition to level 1.
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54 | / 3: f_lseek is removed in addition to level 2. */
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55 |
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56 |
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57 | #define _FS_TINY 0
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58 | /* When _FS_TINY is set to 1, FatFs uses the sector buffer in the file system
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59 | / object instead of the sector buffer in the individual file object for file
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60 | / data transfer. This reduces memory consumption 512 bytes each file object. */
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61 |
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62 |
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63 | #define _USE_STRFUNC 0
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64 | /* To enable string functions, set _USE_STRFUNC to 1 or 2. */
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65 |
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66 |
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67 | #define _USE_MKFS 1
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68 | /* To enable f_mkfs function, set _USE_MKFS to 1 and set _FS_READONLY to 0 */
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69 |
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70 |
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71 | #define _USE_FORWARD 0
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72 | /* To enable f_forward function, set _USE_FORWARD to 1 and set _FS_TINY to 1. */
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73 |
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74 |
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75 | #ifndef _DRIVES
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76 | #define _DRIVES 1
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77 | #endif
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78 | /* Number of volumes (logical drives) to be used. */
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79 |
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80 |
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81 | #define _MAX_SS 512
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82 | /* Maximum sector size to be handled. (512/1024/2048/4096) */
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83 | /* 512 for memroy card and hard disk, 1024 for floppy disk, 2048 for MO disk */
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84 |
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85 |
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86 | #define _MULTI_PARTITION 0
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87 | /* When _MULTI_PARTITION is set to 0, each volume is bound to the same physical
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88 | / drive number and can mount only first primaly partition. When it is set to 1,
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89 | / each volume is tied to the partitions listed in Drives[]. */
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90 |
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91 |
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92 | #define _CODE_PAGE 932
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93 | /* The _CODE_PAGE specifies the OEM code page to be used on the target system.
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94 | / When it is non LFN configuration, there is no difference between SBCS code
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95 | / pages. When LFN is enabled, the code page must always be set correctly.
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96 | / 437 - U.S.
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97 | / 720 - Arabic
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98 | / 737 - Greek
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99 | / 775 - Baltic
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100 | / 850 - Multilingual Latin 1
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101 | / 852 - Latin 2
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102 | / 855 - Cyrillic
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103 | / 857 - Turkish
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104 | / 858 - Multilingual Latin 1 + Euro
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105 | / 862 - Hebrew
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106 | / 866 - Russian
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107 | / 874 - Thai
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108 | / 932 - Japanese Shift-JIS (DBCS)
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109 | / 936 - Simplified Chinese GBK (DBCS)
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110 | / 949 - Korean (DBCS)
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111 | / 950 - Traditional Chinese Big5 (DBCS)
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112 | / 1258 - Vietnam
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113 | */
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114 |
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115 |
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116 | #define _USE_LFN 2
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117 | #define _MAX_LFN 255 /* Maximum LFN length to handle (max:255) */
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118 | /* The _USE_LFN option switches the LFN support.
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119 | /
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120 | / 0: Disable LFN.
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121 | / 1: Enable LFN with static working buffer on the bss. NOT REENTRANT.
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122 | / 2: Enable LFN with dynamic working buffer on the caller's STACK.
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123 | /
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124 | / The working buffer occupies (_MAX_LFN + 1) * 2 bytes. When enable LFN,
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125 | / a Unicode - OEM code conversion function ff_convert() must be added to
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126 | / the project. */
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127 |
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128 |
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129 | #define _FS_REENTRANT 1
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130 | #define _TIMEOUT 1000 /* Timeout period in unit of time ticks */
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131 | #define _SYNC_t int /* Type of sync object used on the OS. */
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132 | /* e.g. HANDLE, OS_EVENT*, ID and etc.. */
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133 | /* To make the FatFs module re-entrant, set _FS_REENTRANT to 1 and add user
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134 | / provided synchronization handlers, ff_req_grant, ff_rel_grant,
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135 | / ff_del_syncobj and ff_cre_syncobj function to the project. */
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136 |
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137 |
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138 |
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139 |
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140 | /* End of configuration options. Do not change followings without care. */
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141 | /*--------------------------------------------------------------------------*/
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142 |
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143 |
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144 |
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145 | /* Definitions corresponds to multiple sector size */
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146 |
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147 | #if _MAX_SS == 512
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148 | #define SS(fs) 512
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149 | #else
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150 | #if _MAX_SS == 1024 || _MAX_SS == 2048 || _MAX_SS == 4096
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151 | #define SS(fs) ((fs)->s_size)
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152 | #else
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153 | #error Sector size must be 512, 1024, 2048 or 4096.
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154 | #endif
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155 | #endif
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156 |
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157 |
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158 |
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159 | /* File system object structure */
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160 |
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161 | typedef struct _FATFS {
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162 | BYTE fs_type; /* FAT sub type */
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163 | BYTE drive; /* Physical drive number */
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164 | BYTE csize; /* Number of sectors per cluster */
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165 | BYTE n_fats; /* Number of FAT copies */
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166 | BYTE wflag; /* win[] dirty flag (1:must be written back) */
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167 | BYTE pad1;
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168 | WORD id; /* File system mount ID */
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169 | WORD n_rootdir; /* Number of root directory entries (0 on FAT32) */
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170 | #if _FS_REENTRANT
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171 | _SYNC_t sobj; /* Identifier of sync object */
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172 | #endif
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173 | #if _MAX_SS != 512U
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174 | WORD s_size; /* Sector size */
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175 | #endif
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176 | #if !_FS_READONLY
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177 | BYTE fsi_flag; /* fsinfo dirty flag (1:must be written back) */
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178 | BYTE pad2;
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179 | DWORD last_clust; /* Last allocated cluster */
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180 | DWORD free_clust; /* Number of free clusters */
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181 | DWORD fsi_sector; /* fsinfo sector */
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182 | #endif
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183 | DWORD sects_fat; /* Sectors per fat */
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184 | DWORD max_clust; /* Maximum cluster# + 1. Number of clusters is max_clust - 2 */
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185 | DWORD fatbase; /* FAT start sector */
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186 | DWORD dirbase; /* Root directory start sector (Cluster# on FAT32) */
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187 | DWORD database; /* Data start sector */
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188 | DWORD winsect; /* Current sector appearing in the win[] */
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189 | #if 1 /* ROI DEBUG */
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190 | DWORD dummy[2]; /* cache aline */
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191 | #endif /* ROI DEBUG */
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192 | BYTE win[_MAX_SS];/* Disk access window for Directory/FAT */
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193 | } FATFS;
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194 |
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195 |
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196 |
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197 | /* Directory object structure */
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198 |
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199 | typedef struct _DIR {
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200 | WORD id; /* Owner file system mount ID */
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201 | WORD index; /* Current index number */
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202 | FATFS* fs; /* Pointer to the owner file system object */
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203 | DWORD sclust; /* Table start cluster (0:Static table) */
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204 | DWORD clust; /* Current cluster */
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205 | DWORD sect; /* Current sector */
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206 | BYTE* dir; /* Pointer to the current SFN entry in the win[] */
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207 | BYTE* fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
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208 | #if _USE_LFN
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209 | WCHAR* lfn; /* Pointer to the LFN working buffer */
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210 | WORD lfn_idx; /* Last matched LFN index (0xFFFF:No LFN) */
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211 | #endif
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212 | } DIR;
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213 |
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214 |
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215 |
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216 | /* File object structure */
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217 |
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218 | typedef struct _FIL {
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219 | FATFS* fs; /* Pointer to the owner file system object */
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220 | WORD id; /* Owner file system mount ID */
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221 | BYTE flag; /* File status flags */
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222 | BYTE csect; /* Sector address in the cluster */
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223 | DWORD fptr; /* File R/W pointer */
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224 | DWORD fsize; /* File size */
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225 | DWORD org_clust; /* File start cluster */
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226 | DWORD curr_clust; /* Current cluster */
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227 | DWORD dsect; /* Current data sector */
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228 | #if !_FS_READONLY
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229 | DWORD dir_sect; /* Sector containing the directory entry */
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230 | BYTE* dir_ptr; /* Ponter to the directory entry in the window */
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231 | #endif
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232 | #if !_FS_TINY
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233 | BYTE buf[_MAX_SS];/* File R/W buffer */
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234 | #endif
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235 | } FIL;
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236 |
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237 |
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238 |
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239 | /* File status structure */
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240 |
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241 | typedef struct _FILINFO {
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242 | DWORD fsize; /* File size */
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243 | WORD fdate; /* Last modified date */
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244 | WORD ftime; /* Last modified time */
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245 | BYTE fattrib; /* Attribute */
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246 | char fname[13]; /* Short file name (8.3 format) */
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247 | #if _USE_LFN
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248 | char *lfname; /* Pointer to the LFN buffer */
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249 | int lfsize; /* Size of LFN buffer [bytes] */
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250 | #endif
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251 | } FILINFO;
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252 |
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253 |
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254 |
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255 | /* DBCS code ranges */
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256 |
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257 | #if _CODE_PAGE == 932 /* CP932 (Japanese Shift-JIS) */
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258 | #define _DF1S 0x81 /* DBC 1st byte range 1 start */
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259 | #define _DF1E 0x9F /* DBC 1st byte range 1 end */
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260 | #define _DF2S 0xE0 /* DBC 1st byte range 2 start */
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261 | #define _DF2E 0xFC /* DBC 1st byte range 2 end */
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262 | #define _DS1S 0x40 /* DBC 2nd byte range 1 start */
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263 | #define _DS1E 0x7E /* DBC 2nd byte range 1 end */
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264 | #define _DS2S 0x80 /* DBC 2nd byte range 2 start */
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265 | #define _DS2E 0xFC /* DBC 2nd byte range 2 end */
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266 |
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267 | #elif _CODE_PAGE == 936 /* CP936 (Simplified Chinese GBK) */
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268 | #define _DF1S 0x81
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269 | #define _DF1E 0xFE
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270 | #define _DS1S 0x40
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271 | #define _DS1E 0x7E
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272 | #define _DS2S 0x80
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273 | #define _DS2E 0xFE
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274 |
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275 | #elif _CODE_PAGE == 949 /* CP949 (Korean) */
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276 | #define _DF1S 0x81
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277 | #define _DF1E 0xFE
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278 | #define _DS1S 0x41
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279 | #define _DS1E 0x5A
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280 | #define _DS2S 0x61
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281 | #define _DS2E 0x7A
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282 | #define _DS3S 0x81
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283 | #define _DS3E 0xFE
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284 |
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285 | #elif _CODE_PAGE == 950 /* CP950 (Traditional Chinese Big5) */
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286 | #define _DF1S 0x81
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287 | #define _DF1E 0xFE
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288 | #define _DS1S 0x40
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289 | #define _DS1E 0x7E
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290 | #define _DS2S 0xA1
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291 | #define _DS2E 0xFE
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292 |
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293 | #else /* SBCS code pages */
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294 | #define _DF1S 0
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295 |
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296 | #endif
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297 |
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298 |
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299 |
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300 | /* Character code support macros */
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301 |
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302 | #define IsUpper(c) (((c)>='A')&&((c)<='Z'))
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303 | #define IsLower(c) (((c)>='a')&&((c)<='z'))
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304 | #define IsDigit(c) (((c)>='0')&&((c)<='9'))
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305 |
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306 | #if _DF1S /* DBCS configuration */
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307 |
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308 | #if _DF2S /* Two 1st byte areas */
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309 | #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
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310 | #else /* One 1st byte area */
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311 | #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
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312 | #endif
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313 |
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314 | #if _DS3S /* Three 2nd byte areas */
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315 | #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
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316 | #else /* Two 2nd byte areas */
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317 | #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
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318 | #endif
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319 |
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320 | #else /* SBCS configuration */
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321 |
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322 | #define IsDBCS1(c) 0
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323 | #define IsDBCS2(c) 0
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324 |
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325 | #endif /* _DF1S */
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326 |
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327 |
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328 |
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329 | /* Definitions corresponds to multi partition */
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330 |
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331 | #if _MULTI_PARTITION /* Multiple partition configuration */
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332 |
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333 | typedef struct _PARTITION {
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334 | BYTE pd; /* Physical drive# */
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335 | BYTE pt; /* Partition # (0-3) */
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336 | } PARTITION;
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337 |
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338 | extern
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339 | const PARTITION Drives[]; /* Logical drive# to physical location conversion table */
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340 | #define LD2PD(drv) (Drives[drv].pd) /* Get physical drive# */
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341 | #define LD2PT(drv) (Drives[drv].pt) /* Get partition# */
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342 |
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343 | #else /* Single partition configuration */
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344 |
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345 | #define LD2PD(drv) (drv) /* Physical drive# is equal to the logical drive# */
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346 | #define LD2PT(drv) 0 /* Always mounts the 1st partition */
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347 |
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348 | #endif
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349 |
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350 |
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351 |
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352 | /* File function return code (FRESULT) */
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353 |
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354 | typedef enum {
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355 | FR_OK = 0, /* 0 */
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356 | FR_DISK_ERR, /* 1 */
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357 | FR_INT_ERR, /* 2 */
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358 | FR_NOT_READY, /* 3 */
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359 | FR_NO_FILE, /* 4 */
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360 | FR_NO_PATH, /* 5 */
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361 | FR_INVALID_NAME, /* 6 */
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362 | FR_DENIED, /* 7 */
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363 | FR_EXIST, /* 8 */
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364 | FR_INVALID_OBJECT, /* 9 */
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365 | FR_WRITE_PROTECTED, /* 10 */
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366 | FR_INVALID_DRIVE, /* 11 */
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367 | FR_NOT_ENABLED, /* 12 */
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368 | FR_NO_FILESYSTEM, /* 13 */
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369 | FR_MKFS_ABORTED, /* 14 */
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370 | FR_TIMEOUT /* 15 */
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371 | } FRESULT;
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372 |
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373 |
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374 |
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375 | /*--------------------------------------------------------------*/
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376 | /* FatFs module application interface */
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377 |
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378 | FRESULT f_mount (BYTE, FATFS*); /* Mount/Unmount a logical drive */
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379 | FRESULT f_open (FIL*, const char*, BYTE); /* Open or create a file */
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380 | FRESULT f_read (FIL*, void*, UINT, UINT*); /* Read data from a file */
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381 | FRESULT f_write (FIL*, const void*, UINT, UINT*); /* Write data to a file */
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382 | FRESULT f_lseek (FIL*, DWORD); /* Move file pointer of a file object */
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383 | FRESULT f_close (FIL*); /* Close an open file object */
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384 | FRESULT f_opendir (DIR*, const char*); /* Open an existing directory */
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385 | FRESULT f_readdir (DIR*, FILINFO*); /* Read a directory item */
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386 | FRESULT f_stat (const char*, FILINFO*); /* Get file status */
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387 | FRESULT f_getfree (const char*, DWORD*, FATFS**); /* Get number of free clusters on the drive */
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388 | FRESULT f_truncate (FIL*); /* Truncate file */
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389 | FRESULT f_sync (FIL*); /* Flush cached data of a writing file */
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390 | FRESULT f_unlink (const char*); /* Delete an existing file or directory */
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391 | FRESULT f_mkdir (const char*); /* Create a new directory */
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392 | FRESULT f_chmod (const char*, BYTE, BYTE); /* Change attriburte of the file/dir */
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393 | FRESULT f_utime (const char*, const FILINFO*); /* Change timestamp of the file/dir */
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394 | FRESULT f_rename (const char*, const char*); /* Rename/Move a file or directory */
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395 | FRESULT f_forward (FIL*, UINT(*)(const BYTE*,UINT), UINT, UINT*); /* Forward data to the stream */
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396 | FRESULT f_mkfs (BYTE, BYTE, WORD); /* Create a file system on the drive */
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397 |
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398 | #if _USE_STRFUNC
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399 | int f_putc (int, FIL*); /* Put a character to the file */
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400 | int f_puts (const char*, FIL*); /* Put a string to the file */
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401 | int f_printf (FIL*, const char*, ...); /* Put a formatted string to the file */
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402 | char* f_gets (char*, int, FIL*); /* Get a string from the file */
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403 | #define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0)
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404 | #define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0)
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405 | #ifndef EOF
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406 | #define EOF -1
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407 | #endif
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408 | #endif
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409 |
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410 |
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411 |
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412 | /*--------------------------------------------------------------*/
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413 | /* User defined functions */
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414 |
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415 | /* Real time clock */
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416 | #if !_FS_READONLY
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417 | DWORD get_fattime (void); /* 31-25: Year(0-127 org.1980), 24-21: Month(1-12), 20-16: Day(1-31) */
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418 | /* 15-11: Hour(0-23), 10-5: Minute(0-59), 4-0: Second(0-29 *2) */
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419 | #endif
|
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420 |
|
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421 | /* Unicode - OEM code conversion */
|
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422 | #if _USE_LFN
|
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423 | WCHAR ff_convert (WCHAR, UINT);
|
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424 | #endif
|
---|
425 |
|
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426 | /* Sync functions */
|
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427 | #if _FS_REENTRANT
|
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428 | BOOL ff_cre_syncobj(BYTE, _SYNC_t*);
|
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429 | BOOL ff_del_syncobj(_SYNC_t);
|
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430 | BOOL ff_req_grant(_SYNC_t);
|
---|
431 | void ff_rel_grant(_SYNC_t);
|
---|
432 | #endif
|
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433 |
|
---|
434 |
|
---|
435 |
|
---|
436 | /*--------------------------------------------------------------*/
|
---|
437 | /* Flags and offset address */
|
---|
438 |
|
---|
439 |
|
---|
440 | /* File access control and file status flags (FIL.flag) */
|
---|
441 |
|
---|
442 | #define FA_READ 0x01
|
---|
443 | #define FA_OPEN_EXISTING 0x00
|
---|
444 | #if _FS_READONLY == 0
|
---|
445 | #define FA_WRITE 0x02
|
---|
446 | #define FA_CREATE_NEW 0x04
|
---|
447 | #define FA_CREATE_ALWAYS 0x08
|
---|
448 | #define FA_OPEN_ALWAYS 0x10
|
---|
449 | #define FA__WRITTEN 0x20
|
---|
450 | #define FA__DIRTY 0x40
|
---|
451 | #endif
|
---|
452 | #define FA__ERROR 0x80
|
---|
453 |
|
---|
454 |
|
---|
455 | /* FAT sub type (FATFS.fs_type) */
|
---|
456 |
|
---|
457 | #define FS_FAT12 1
|
---|
458 | #define FS_FAT16 2
|
---|
459 | #define FS_FAT32 3
|
---|
460 |
|
---|
461 |
|
---|
462 | /* File attribute bits for directory entry */
|
---|
463 |
|
---|
464 | #define AM_RDO 0x01 /* Read only */
|
---|
465 | #define AM_HID 0x02 /* Hidden */
|
---|
466 | #define AM_SYS 0x04 /* System */
|
---|
467 | #define AM_VOL 0x08 /* Volume label */
|
---|
468 | #define AM_LFN 0x0F /* LFN entry */
|
---|
469 | #define AM_DIR 0x10 /* Directory */
|
---|
470 | #define AM_ARC 0x20 /* Archive */
|
---|
471 | #define AM_MASK 0x3F /* Mask of defined bits */
|
---|
472 |
|
---|
473 |
|
---|
474 | /* FatFs refers the members in the FAT structures with byte offset instead
|
---|
475 | / of structure member because there are incompatibility of the packing option
|
---|
476 | / between various compilers. */
|
---|
477 |
|
---|
478 | #define BS_jmpBoot 0
|
---|
479 | #define BS_OEMName 3
|
---|
480 | #define BPB_BytsPerSec 11
|
---|
481 | #define BPB_SecPerClus 13
|
---|
482 | #define BPB_RsvdSecCnt 14
|
---|
483 | #define BPB_NumFATs 16
|
---|
484 | #define BPB_RootEntCnt 17
|
---|
485 | #define BPB_TotSec16 19
|
---|
486 | #define BPB_Media 21
|
---|
487 | #define BPB_FATSz16 22
|
---|
488 | #define BPB_SecPerTrk 24
|
---|
489 | #define BPB_NumHeads 26
|
---|
490 | #define BPB_HiddSec 28
|
---|
491 | #define BPB_TotSec32 32
|
---|
492 | #define BS_55AA 510
|
---|
493 |
|
---|
494 | #define BS_DrvNum 36
|
---|
495 | #define BS_BootSig 38
|
---|
496 | #define BS_VolID 39
|
---|
497 | #define BS_VolLab 43
|
---|
498 | #define BS_FilSysType 54
|
---|
499 |
|
---|
500 | #define BPB_FATSz32 36
|
---|
501 | #define BPB_ExtFlags 40
|
---|
502 | #define BPB_FSVer 42
|
---|
503 | #define BPB_RootClus 44
|
---|
504 | #define BPB_FSInfo 48
|
---|
505 | #define BPB_BkBootSec 50
|
---|
506 | #define BS_DrvNum32 64
|
---|
507 | #define BS_BootSig32 66
|
---|
508 | #define BS_VolID32 67
|
---|
509 | #define BS_VolLab32 71
|
---|
510 | #define BS_FilSysType32 82
|
---|
511 |
|
---|
512 | #define FSI_LeadSig 0
|
---|
513 | #define FSI_StrucSig 484
|
---|
514 | #define FSI_Free_Count 488
|
---|
515 | #define FSI_Nxt_Free 492
|
---|
516 |
|
---|
517 | #define MBR_Table 446
|
---|
518 |
|
---|
519 | #define DIR_Name 0
|
---|
520 | #define DIR_Attr 11
|
---|
521 | #define DIR_NTres 12
|
---|
522 | #define DIR_CrtTime 14
|
---|
523 | #define DIR_CrtDate 16
|
---|
524 | #define DIR_FstClusHI 20
|
---|
525 | #define DIR_WrtTime 22
|
---|
526 | #define DIR_WrtDate 24
|
---|
527 | #define DIR_FstClusLO 26
|
---|
528 | #define DIR_FileSize 28
|
---|
529 | #define LDIR_Ord 0
|
---|
530 | #define LDIR_Attr 11
|
---|
531 | #define LDIR_Type 12
|
---|
532 | #define LDIR_Chksum 13
|
---|
533 | #define LDIR_FstClusLO 26
|
---|
534 |
|
---|
535 |
|
---|
536 |
|
---|
537 | /*--------------------------------*/
|
---|
538 | /* Multi-byte word access macros */
|
---|
539 |
|
---|
540 | #if _WORD_ACCESS == 1 /* Enable word access to the FAT structure */
|
---|
541 | #define LD_WORD(ptr) (WORD)(*(WORD*)(BYTE*)(ptr))
|
---|
542 | #define LD_DWORD(ptr) (DWORD)(*(DWORD*)(BYTE*)(ptr))
|
---|
543 | #define ST_WORD(ptr,val) *(WORD*)(BYTE*)(ptr)=(WORD)(val)
|
---|
544 | #define ST_DWORD(ptr,val) *(DWORD*)(BYTE*)(ptr)=(DWORD)(val)
|
---|
545 | #else /* Use byte-by-byte access to the FAT structure */
|
---|
546 | #define LD_WORD(ptr) (WORD)(((WORD)*(BYTE*)((ptr)+1)<<8)|(WORD)*(BYTE*)(ptr))
|
---|
547 | #define LD_DWORD(ptr) (DWORD)(((DWORD)*(BYTE*)((ptr)+3)<<24)|((DWORD)*(BYTE*)((ptr)+2)<<16)|((WORD)*(BYTE*)((ptr)+1)<<8)|*(BYTE*)(ptr))
|
---|
548 | #define ST_WORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8)
|
---|
549 | #define ST_DWORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8); *(BYTE*)((ptr)+2)=(BYTE)((DWORD)(val)>>16); *(BYTE*)((ptr)+3)=(BYTE)((DWORD)(val)>>24)
|
---|
550 | #endif
|
---|
551 |
|
---|
552 |
|
---|
553 | #endif /* _FATFS */
|
---|