?? fs_variable.lst
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C51 COMPILER V7.50 FS_VARIABLE 10/20/2007 09:14:49 PAGE 1
C51 COMPILER V7.50, COMPILATION OF MODULE FS_VARIABLE
OBJECT MODULE PLACED IN fs_variable.obj
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE modules\file\fs_variable.c LARGE BROWSE DEBUG OBJECTEXTEND PRINT(.\fs_varia
-ble.lst) OBJECT(fs_variable.obj)
line level source
1 /*C**************************************************************************
2 * NAME: fs_variable.c
3 *----------------------------------------------------------------------------
4 * Copyright (c) 2003 Atmel.
5 *----------------------------------------------------------------------------
6 * RELEASE: snd1c-refd-nf-4_0_3
7 * REVISION: 1.3
8 *----------------------------------------------------------------------------
9 * PURPOSE:
10 * File system variable definition
11 *
12 * NOTES:
13 * Arrangement :
14 * FAT12/16 only
15 * FAT32 only
16 * FAT32 and ISO 9660
17 * FAT12/16 and ISO 9660 ?
18 *****************************************************************************/
19
20 /*_____ I N C L U D E S ____________________________________________________*/
21
22 #include "config.h" /* system configuration */
23 #include "..\mem\hard.h" /* low level function definition */
24 #include "file.h" /* file function definition */
25
26 // #include "fat32.h" /* fat32 file-system definition */
27 #include "fat.h"
28
29
30
31
32
33 /*_____ M A C R O S ________________________________________________________*/
34
35
36 /*_____ D E F I N I T I O N ________________________________________________*/
37
38
39
40 extern pdata Byte gl_buffer[];
41
42
43 /* shared file system variables */
44
45 /* disk management */
46 data Uint32 fat_ptr_data; /* address of the first byte
47 /* of data */
48 xdata Byte fat_buf_sector[512]; /* 512 bytes buffer */
49
50 /* directory management */
51 idata Uint16 fat_dclust_byte_count;/* byte counter in directory sector */
52 idata Uint32 fat_dir_current_sect; /* sector of selected entry in dir list */
53 xdata Uint16 fat_dir_list_index; /* index of current entry in dir list */
54 xdata Uint32 fat_dir_start_sect; /* start sector of dir list */
C51 COMPILER V7.50 FS_VARIABLE 10/20/2007 09:14:49 PAGE 2
55 xdata Uint16 fat_dir_list_last; /* index of last entry in dir list */
56 idata Uint16 fat_dchain_index; /* the number of the fragment of the dir, in fact */
57 /* the index of the table in the cluster chain */
58 idata Uint16 fat_fchain_nb_clust; /* the offset of the cluster from the first cluster */
59 /* of the file fragment */
60
61
62 /* file management */
63 data Uint16 fat_fclust_byte_count; /* byte counter in file cluster */
64 xdata Byte current_ext;
65 xdata char ext[3]; /* file extension (limited to 3 characters) */
66
67 char pdata *lfn_name = &(gl_buffer[32]); /* long filename limited to MAX_FILENAME_LEN chars */
68 Uint16 song_name[11];
69 bit bdata song_name_style;
70
71 /* Mode repeat A/B variables */
72 xdata Byte fat_fchain_index_save;
73 xdata Byte fat_fchain_nb_clust_save;
74 xdata Uint16 fat_fclust_byte_count_save;
75
76
77
78
79 /* Specific variables for fat file system */
80 //#if ((MEM_CHIP_FS == FS_FAT_32) || (MEM_CHIP_FS == FS_FAT_12_16) || (MEM_CARD_FS == FS_FAT_32) || (MEM_C
-ARD_FS == FS_FAT_12_16))
81 /* disk management */
82 data Uint32 fat_ptr_fats; /* address of the first byte of FAT */
83 data Uint32 fat_ptr_rdir;
84 data Byte fat_cluster_size; /* cluster size (sector count) */
85 idata Byte fat_cluster_mask; /* mask for end of cluster test */
86
87
88 bdata bit fat_is_fat16; /* TRUE: FAT16 - FALSE: FAT12 */
89 bdata bit fat_open_mode; /* READ or WRITE */
90 bdata bit fat_2_is_present; /* TRUE: 2 FATs - FALSE: 1 FAT */
91 bdata bit flag_end_disk_file;
92
93 xdata Uint32 fat_count_of_clusters;/* number of cluster - 2 */
94 xdata Union32 fat_file_size;
95 xdata Uint32 fat_fat_size; /* FAT size in sector count */
96
97 /* directory management */
98 xdata fat_st_clust_chain dclusters[MAX_DIR_FRAGMENT_NUMBER];
99 /* cluster chain for the current directory */
100 bdata bit dir_is_root; /* TRUE: point the root directory */
101
102 idata Byte fat_dchain_nb_clust; /* the offset of the cluster from the first cluster */
103 /* of the dir fragment */
104 xdata Byte fat_last_dclust_index;/* index of the last cluster in directory chain */
105 xdata Uint32 fat_dir_current_offs; /* entry offset from fat_dir_current_sect */
106 xdata fat_st_cache fat_cache; /* The cache structure, see the .h for more info */
107
108
109 /* file management */
110 xdata fat_st_clust_chain fclusters[MAX_FILE_FRAGMENT_NUMBER];
111 /* cluster chain for the current file */
112 idata Byte fat_last_clust_index;/* index of the last cluster in file chain */
113 idata Byte fat_fchain_index; /* the number of the fragment of the file, in fact */
114 /* the index of the table in the cluster chain */
115
C51 COMPILER V7.50 FS_VARIABLE 10/20/2007 09:14:49 PAGE 3
116 xdata Uint32 fat_current_file_size;
117 xdata Uint32 fat_rootclus_fat32; /* root cluster address */
118 bdata bit fat_last_dir_cluster_full;
119 bdata bit fat_no_entries_free;
120 xdata Uint16 fat_total_clusters;
121 xdata Uint32 last_free_cluster;
122
123 xdata Uint16 fat_root_entry; /* position in root dir */
124
125
126 idata Uint16 fat_current_end_entry_position;
127 idata Uint16 fat_current_start_entry_position;
128 xdata Uint16 fat_nb_deleted_entries;
129 xdata Uint16 fat_nb_total_entries;
130
131 bdata bit fat_is_fat32; /* TRUE: FAT32 - FALSE: FAT12/FAT16 */
132
133 xdata Uint32 fat_bpb_add;
134
135
136 //#endif
137
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = ---- ----
CONSTANT SIZE = ---- ----
XDATA SIZE = 1071 ----
PDATA SIZE = ---- ----
DATA SIZE = 15 ----
IDATA SIZE = 18 ----
BIT SIZE = 9 ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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