vtoycli/fat_io_lib/include/fat_defs.h

   1 #ifndef __FAT_DEFS_H__
   2 #define __FAT_DEFS_H__
   3
   4 #include "fat_opts.h"
   5 #include "fat_types.h"
   6
   7 //-----------------------------------------------------------------------------
   8 //            FAT32 Offsets
   9 //        Name                Offset
  10 //-----------------------------------------------------------------------------
  11
  12 // Boot Sector
  13 #define BS_JMPBOOT              0    // Length = 3
  14 #define BS_OEMNAME              3    // Length = 8
  15 #define BPB_BYTSPERSEC          11    // Length = 2
  16 #define BPB_SECPERCLUS          13    // Length = 1
  17 #define BPB_RSVDSECCNT          14    // Length = 2
  18 #define BPB_NUMFATS             16    // Length = 1
  19 #define BPB_ROOTENTCNT          17    // Length = 2
  20 #define BPB_TOTSEC16            19    // Length = 2
  21 #define BPB_MEDIA               21    // Length = 1
  22 #define    BPB_FATSZ16          22    // Length = 2
  23 #define BPB_SECPERTRK           24    // Length = 2
  24 #define BPB_NUMHEADS            26    // Length = 2
  25 #define BPB_HIDDSEC             28    // Length = 4
  26 #define BPB_TOTSEC32            32    // Length = 4
  27
  28 // FAT 12/16
  29 #define BS_FAT_DRVNUM           36    // Length = 1
  30 #define BS_FAT_BOOTSIG          38    // Length = 1
  31 #define BS_FAT_VOLID            39    // Length = 4
  32 #define BS_FAT_VOLLAB           43    // Length = 11
  33 #define BS_FAT_FILSYSTYPE       54    // Length = 8
  34
  35 // FAT 32
  36 #define BPB_FAT32_FATSZ32       36    // Length = 4
  37 #define BPB_FAT32_EXTFLAGS      40    // Length = 2
  38 #define BPB_FAT32_FSVER         42    // Length = 2
  39 #define BPB_FAT32_ROOTCLUS      44    // Length = 4
  40 #define BPB_FAT32_FSINFO        48    // Length = 2
  41 #define BPB_FAT32_BKBOOTSEC     50    // Length = 2
  42 #define BS_FAT32_DRVNUM         64    // Length = 1
  43 #define BS_FAT32_BOOTSIG        66    // Length = 1
  44 #define BS_FAT32_VOLID          67    // Length = 4
  45 #define BS_FAT32_VOLLAB         71    // Length = 11
  46 #define BS_FAT32_FILSYSTYPE     82    // Length = 8
  47
  48 //-----------------------------------------------------------------------------
  49 // FAT Types
  50 //-----------------------------------------------------------------------------
  51 #define FAT_TYPE_FAT12          1
  52 #define FAT_TYPE_FAT16          2
  53 #define FAT_TYPE_FAT32          3
  54
  55 //-----------------------------------------------------------------------------
  56 // FAT32 Specific Statics
  57 //-----------------------------------------------------------------------------
  58 #define SIGNATURE_POSITION              510
  59 #define SIGNATURE_VALUE                 0xAA55
  60 #define PARTITION1_TYPECODE_LOCATION    450
  61 #define FAT32_TYPECODE1                 0x0B
  62 #define FAT32_TYPECODE2                 0x0C
  63 #define PARTITION1_LBA_BEGIN_LOCATION   454
  64 #define PARTITION1_SIZE_LOCATION        458
  65
  66 #define FAT_DIR_ENTRY_SIZE              32
  67 #define FAT_SFN_SIZE_FULL               11
  68 #define FAT_SFN_SIZE_PARTIAL            8
  69
  70 //-----------------------------------------------------------------------------
  71 // FAT32 File Attributes and Types
  72 //-----------------------------------------------------------------------------
  73 #define FILE_ATTR_READ_ONLY             0x01
  74 #define FILE_ATTR_HIDDEN                0x02
  75 #define FILE_ATTR_SYSTEM                0x04
  76 #define FILE_ATTR_SYSHID                0x06
  77 #define FILE_ATTR_VOLUME_ID             0x08
  78 #define FILE_ATTR_DIRECTORY             0x10
  79 #define FILE_ATTR_ARCHIVE               0x20
  80 #define FILE_ATTR_LFN_TEXT              0x0F
  81 #define FILE_HEADER_BLANK               0x00
  82 #define FILE_HEADER_DELETED             0xE5
  83 #define FILE_TYPE_DIR                   0x10
  84 #define FILE_TYPE_FILE                  0x20
  85
  86 //-----------------------------------------------------------------------------
  87 // Time / Date details
  88 //-----------------------------------------------------------------------------
  89 #define FAT_TIME_HOURS_SHIFT            11
  90 #define FAT_TIME_HOURS_MASK             0x1F
  91 #define FAT_TIME_MINUTES_SHIFT          5
  92 #define FAT_TIME_MINUTES_MASK           0x3F
  93 #define FAT_TIME_SECONDS_SHIFT          0
  94 #define FAT_TIME_SECONDS_MASK           0x1F
  95 #define FAT_TIME_SECONDS_SCALE          2
  96 #define FAT_DATE_YEAR_SHIFT             9
  97 #define FAT_DATE_YEAR_MASK              0x7F
  98 #define FAT_DATE_MONTH_SHIFT            5
  99 #define FAT_DATE_MONTH_MASK             0xF
 100 #define FAT_DATE_DAY_SHIFT              0
 101 #define FAT_DATE_DAY_MASK               0x1F
 102 #define FAT_DATE_YEAR_OFFSET            1980
 103
 104 //-----------------------------------------------------------------------------
 105 // Other Defines
 106 //-----------------------------------------------------------------------------
 107 #define FAT32_LAST_CLUSTER              0xFFFFFFFF
 108 #define FAT32_INVALID_CLUSTER           0xFFFFFFFF
 109
 110 STRUCT_PACK_BEGIN
 111 struct fat_dir_entry STRUCT_PACK
 112 {
 113     uint8 Name[11];
 114     uint8 Attr;
 115     uint8 NTRes;
 116     uint8 CrtTimeTenth;
 117     uint8 CrtTime[2];
 118     uint8 CrtDate[2];
 119     uint8 LstAccDate[2];
 120     uint16 FstClusHI;
 121     uint8 WrtTime[2];
 122     uint8 WrtDate[2];
 123     uint16 FstClusLO;
 124     uint32 FileSize;
 125 } STRUCT_PACKED;
 126 STRUCT_PACK_END
 127
 128 #endif