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#ifndef _FAT16_H
#define _FAT16_H
 
 
//________________________________________________________________________________________________________________________________________
// 
// Definitions
//                              
//________________________________________________________________________________________________________________________________________
 
#define FILE_MAX_OPEN   4                               // The number of files that can accessed simultaneously. 
#define SEEK_SET        0
#define SEEK_CUR        1
#define SEEK_END        2
#define EOF     (-1) 
#define BYTES_PER_SECTOR        512
/*
________________________________________________________________________________________________________________________________________
 
        Structure of a filepointer
________________________________________________________________________________________________________________________________________
*/
typedef struct
{
        u32 FirstSectorOfFirstCluster;  // First sector of the first cluster of the file.
        u32 FirstSectorOfCurrCluster;   // First sector of the cluster which is edited at the moment.
        u32 FirstSectorOfLastCluster;   // First sector of the last cluster of the file
        u8      SectorOfCurrCluster;            // The sector within the current cluster.
        u16 ByteOfCurrSector;                   // The byte location within the current sector.
        u8      Mode;                                           // Mode of fileoperation (read,write)
        u32 Size;                                               // The size of the opend file in bytes.
        u32 Position;                                   // Pointer to a character within the file 0 < fileposition < filesize
        u32 DirectorySector;                    // the sectorposition where the directoryentry has been made.
        u16     DirectoryIndex;                         // The index to the directoryentry within the specified sector.
        u8      Attribute;                                      // The attribute of the file opened.
        u8  Cache[BYTES_PER_SECTOR];    // Cache for read and write operation from or to the sd-card.
        u32 SectorInCache;                              // The last sector read, which is still in the sector cache.
        u8      State;                                          // State of the filepointer (used/unused/...) 
} File_t;
 
// attribute definitions          
#define ATTR_NONE               0x00    // normal file
#define ATTR_READONLY           0x01    // file is readonly
#define ATTR_HIDDEN                     0x02    // file is hidden
#define ATTR_SYSTEM                     0x04    // file is a system file
#define ATTR_VOLUMELABEL        0x08    // entry is a volume label
#define ATTR_LONG_FILENAME      0x0F    // this is a long filename entry
#define ATTR_SUBDIRECTORY       0x10    // entry is a directory name
#define ATTR_ARCHIVE            0x20    // file is new or modified
#define ATTR_ANY_FILE           0x3F    // all files
 
 
 
//________________________________________________________________________________________________________________________________________
//
//      Structure of an item used by functions findfirst and findnext
//________________________________________________________________________________________________________________________________________
 
typedef struct
{
        File_t  fp;                                             // filepointer used to get access to the filesystemstructure
        s8              searchstring[12];               // findfirst and findnext will only return elements within the specified directory matching this searchstring (8+3 + Terminator).
        s8              name[13];                               // the name of the element found within the specified directory
        u8              active;                                 // if the attribute active is set the name and the attributes of an element found within DirectoryEntryExist will be entered into the structure 
        u8              attribfilter;                  
        u8              attribmask;
} __attribute__((packed)) Find_t;
 
 
 
typedef struct
{
        u8      IsValid;                                // 0 means invalid, else valid
        u8      SectorsPerCluster;              // how many sectors does a cluster contain?
        u8      FatCopies;                              // Numbers of copies of the FAT
        u16     MaxRootEntries;                 // Possible number of entries in the root directory.
        u16     SectorsPerFat;                  // how many sectors does a fat16 contain?
        u32 FirstFatSector;                     // sector of the start of the fat
        u32 FirstRootDirSector;         // sector of the rootdirectory
        u32 FirstDataSector;            // sector of the first cluster containing data (cluster2).
        u32 LastDataSector;                     // the last data sector of the partition
        u8  VolumeLabel[12];        // the volume label
        u32     CurrentWorkingDirectory;// A pointer to the directory we are actual using
        s8      PathToCwd[256];                 // a string containing the complete path to the current working directory
}   __attribute__((packed)) Partition_t;
 
extern Partition_t      Partition;              // Structure holds partition information
 
//________________________________________________________________________________________________________________________________________
// 
// API to the FAT16 filesystem
//                              
//________________________________________________________________________________________________________________________________________
 
// File System Funtions
u8              Fat16_Init(void);
u8              Fat16_Deinit(void);
u8              Fat16_IsValid(void);
s8*             FAT16_GetVolumeLabel(void);
 
// File Function        
File_t *fopen_(s8* const filename, const s8 mode);
s16     fclose_(File_t * const file);
u8              fexist_(s8* const filename);
s16             fflush_(File_t * const file);
s16     fseek_(File_t * const file, s32 offset, s16 origin);
s16             fgetc_(File_t * const file);
s16             fputc_(s8 c, File_t * const file);
u32     fread_(void *buffer, u32 size, u32 count, File_t * const file);
u32     fwrite_(void *buffer, u32 size, u32 count, File_t * const file);
s16             fputs_(s8 * const string, File_t * const file);
s8 *    fgets_(s8 * const string, s16 length, File_t * const file);
u8              feof_(File_t * const file);
u8              fdelete_(s8* const filepath);
 
// Directory Functions
s8              *getcwd_(void);
u8              findfirst_(const s8* name, u8 attribmask, Find_t *);
u8              findnext_(Find_t *);
u8              chdir_(s8* const dirpath);
u8              mkdir_(s8* const dirpath);
u8              rmdir_(s8* const dirpath);
 
 
 
 
#endif //_FAT16_H
 
 
 
 
 

Rev 427	Rev 433
1	#ifndef _FAT16_H	1	#ifndef _FAT16_H
2	#define _FAT16_H	2	#define _FAT16_H
3		3
4		4
5	//________________________________________________________________________________________________________________________________________	5	//________________________________________________________________________________________________________________________________________
6	//	6	//
7	// Definitions	7	// Definitions
8	//	8	//
9	//________________________________________________________________________________________________________________________________________	9	//________________________________________________________________________________________________________________________________________
10		10
11	#define FILE_MAX_OPEN 4 // The number of files that can accessed simultaneously.	11	#define FILE_MAX_OPEN 4 // The number of files that can accessed simultaneously.
12	#define SEEK_SET 0	12	#define SEEK_SET 0
13	#define SEEK_CUR 1	13	#define SEEK_CUR 1
14	#define SEEK_END 2	14	#define SEEK_END 2
15	#define EOF (-1)	15	#define EOF (-1)
16	#define BYTES_PER_SECTOR 512	16	#define BYTES_PER_SECTOR 512
17	/*	17	/*
18	________________________________________________________________________________________________________________________________________	18	________________________________________________________________________________________________________________________________________
19		19
20	Structure of a filepointer	20	Structure of a filepointer
21	________________________________________________________________________________________________________________________________________	21	________________________________________________________________________________________________________________________________________
22	*/	22	*/
23	typedef struct	23	typedef struct
24	{	24	{
25	u32 FirstSectorOfFirstCluster; // First sector of the first cluster of the file.	25	u32 FirstSectorOfFirstCluster; // First sector of the first cluster of the file.
26	u32 FirstSectorOfCurrCluster; // First sector of the cluster which is edited at the moment.	26	u32 FirstSectorOfCurrCluster; // First sector of the cluster which is edited at the moment.
27	u32 FirstSectorOfLastCluster; // First sector of the last cluster of the file	27	u32 FirstSectorOfLastCluster; // First sector of the last cluster of the file
28	u8 SectorOfCurrCluster; // The sector within the current cluster.	28	u8 SectorOfCurrCluster; // The sector within the current cluster.
29	u16 ByteOfCurrSector; // The byte location within the current sector.	29	u16 ByteOfCurrSector; // The byte location within the current sector.
30	u8 Mode; // Mode of fileoperation (read,write)	30	u8 Mode; // Mode of fileoperation (read,write)
31	u32 Size; // The size of the opend file in bytes.	31	u32 Size; // The size of the opend file in bytes.
32	u32 Position; // Pointer to a character within the file 0 < fileposition < filesize	32	u32 Position; // Pointer to a character within the file 0 < fileposition < filesize
33	u32 DirectorySector; // the sectorposition where the directoryentry has been made.	33	u32 DirectorySector; // the sectorposition where the directoryentry has been made.
34	u16 DirectoryIndex; // The index to the directoryentry within the specified sector.	34	u16 DirectoryIndex; // The index to the directoryentry within the specified sector.
35	u8 Attribute; // The attribute of the file opened.	35	u8 Attribute; // The attribute of the file opened.
36	u8 Cache[BYTES_PER_SECTOR]; // Cache for read and write operation from or to the sd-card.	36	u8 Cache[BYTES_PER_SECTOR]; // Cache for read and write operation from or to the sd-card.
37	u32 SectorInCache; // The last sector read, which is still in the sector cache.	37	u32 SectorInCache; // The last sector read, which is still in the sector cache.
38	u8 State; // State of the filepointer (used/unused/...)	38	u8 State; // State of the filepointer (used/unused/...)
39	} File_t;	39	} File_t;
40		40
41	// attribute definitions	41	// attribute definitions
42	#define ATTR_NONE 0x00 // normal file	42	#define ATTR_NONE 0x00 // normal file
43	#define ATTR_READONLY 0x01 // file is readonly	43	#define ATTR_READONLY 0x01 // file is readonly
44	#define ATTR_HIDDEN 0x02 // file is hidden	44	#define ATTR_HIDDEN 0x02 // file is hidden
45	#define ATTR_SYSTEM 0x04 // file is a system file	45	#define ATTR_SYSTEM 0x04 // file is a system file
46	#define ATTR_VOLUMELABEL 0x08 // entry is a volume label	46	#define ATTR_VOLUMELABEL 0x08 // entry is a volume label
47	#define ATTR_LONG_FILENAME 0x0F // this is a long filename entry	47	#define ATTR_LONG_FILENAME 0x0F // this is a long filename entry
48	#define ATTR_SUBDIRECTORY 0x10 // entry is a directory name	48	#define ATTR_SUBDIRECTORY 0x10 // entry is a directory name
49	#define ATTR_ARCHIVE 0x20 // file is new or modified	49	#define ATTR_ARCHIVE 0x20 // file is new or modified
50	#define ATTR_ANY_FILE 0x3F // all files	50	#define ATTR_ANY_FILE 0x3F // all files
51		51
52		52
53		53
54	//________________________________________________________________________________________________________________________________________	54	//________________________________________________________________________________________________________________________________________
55	//	55	//
56	// Structure of an item used by functions findfirst and findnext	56	// Structure of an item used by functions findfirst and findnext
57	//________________________________________________________________________________________________________________________________________	57	//________________________________________________________________________________________________________________________________________
58		58
59	typedef struct	59	typedef struct
60	{	60	{
61	File_t fp; // filepointer used to get access to the filesystemstructure	61	File_t fp; // filepointer used to get access to the filesystemstructure
62	s8 searchstring[12]; // findfirst and findnext will only return elements within the specified directory matching this searchstring (8+3 + Terminator).	62	s8 searchstring[12]; // findfirst and findnext will only return elements within the specified directory matching this searchstring (8+3 + Terminator).
63	s8 name[13]; // the name of the element found within the specified directory	63	s8 name[13]; // the name of the element found within the specified directory
64	u8 active; // if the attribute active is set the name and the attributes of an element found within DirectoryEntryExist will be entered into the structure	64	u8 active; // if the attribute active is set the name and the attributes of an element found within DirectoryEntryExist will be entered into the structure
65	u8 attribfilter;	65	u8 attribfilter;
66	u8 attribmask;	66	u8 attribmask;
67	} __attribute__((packed)) Find_t;	67	} __attribute__((packed)) Find_t;
-		68
-		69
-		70
-		71	typedef struct
-		72	{
-		73	u8 IsValid; // 0 means invalid, else valid
-		74	u8 SectorsPerCluster; // how many sectors does a cluster contain?
-		75	u8 FatCopies; // Numbers of copies of the FAT
-		76	u16 MaxRootEntries; // Possible number of entries in the root directory.
-		77	u16 SectorsPerFat; // how many sectors does a fat16 contain?
-		78	u32 FirstFatSector; // sector of the start of the fat
-		79	u32 FirstRootDirSector; // sector of the rootdirectory
-		80	u32 FirstDataSector; // sector of the first cluster containing data (cluster2).
-		81	u32 LastDataSector; // the last data sector of the partition
-		82	u8 VolumeLabel[12]; // the volume label
-		83	u32 CurrentWorkingDirectory;// A pointer to the directory we are actual using
-		84	s8 PathToCwd[256]; // a string containing the complete path to the current working directory
-		85	} __attribute__((packed)) Partition_t;
-		86
-		87	extern Partition_t Partition; // Structure holds partition information
68		88
69	//________________________________________________________________________________________________________________________________________	89	//________________________________________________________________________________________________________________________________________
70	//	90	//
71	// API to the FAT16 filesystem	91	// API to the FAT16 filesystem
72	//	92	//
73	//________________________________________________________________________________________________________________________________________	93	//________________________________________________________________________________________________________________________________________
74		94
75	// File System Funtions	95	// File System Funtions
76	u8 Fat16_Init(void);	96	u8 Fat16_Init(void);
77	u8 Fat16_Deinit(void);	97	u8 Fat16_Deinit(void);
78	u8 Fat16_IsValid(void);	98	u8 Fat16_IsValid(void);
79	s8* FAT16_GetVolumeLabel(void);	99	s8* FAT16_GetVolumeLabel(void);
80		100
81	// File Function	101	// File Function
82	File_t fopen_(s8 const filename, const s8 mode);	102	File_t fopen_(s8 const filename, const s8 mode);
83	s16 fclose_(File_t * const file);	103	s16 fclose_(File_t * const file);
84	u8 fexist_(s8* const filename);	104	u8 fexist_(s8* const filename);
85	s16 fflush_(File_t * const file);	105	s16 fflush_(File_t * const file);
86	s16 fseek_(File_t * const file, s32 offset, s16 origin);	106	s16 fseek_(File_t * const file, s32 offset, s16 origin);
87	s16 fgetc_(File_t * const file);	107	s16 fgetc_(File_t * const file);
88	s16 fputc_(s8 c, File_t * const file);	108	s16 fputc_(s8 c, File_t * const file);
89	u32 fread_(void buffer, u32 size, u32 count, File_t const file);	109	u32 fread_(void buffer, u32 size, u32 count, File_t const file);
90	u32 fwrite_(void buffer, u32 size, u32 count, File_t const file);	110	u32 fwrite_(void buffer, u32 size, u32 count, File_t const file);
91	s16 fputs_(s8 * const string, File_t * const file);	111	s16 fputs_(s8 * const string, File_t * const file);
92	s8 * fgets_(s8 * const string, s16 length, File_t * const file);	112	s8 * fgets_(s8 * const string, s16 length, File_t * const file);
93	u8 feof_(File_t * const file);	113	u8 feof_(File_t * const file);
94	u8 fdelete_(s8* const filepath);	114	u8 fdelete_(s8* const filepath);
95		115
96	// Directory Functions	116	// Directory Functions
97	s8 *getcwd_(void);	117	s8 *getcwd_(void);
98	u8 findfirst_(const s8* name, u8 attribmask, Find_t *);	118	u8 findfirst_(const s8* name, u8 attribmask, Find_t *);
99	u8 findnext_(Find_t *);	119	u8 findnext_(Find_t *);
100	u8 chdir_(s8* const dirpath);	120	u8 chdir_(s8* const dirpath);
101	u8 mkdir_(s8* const dirpath);	121	u8 mkdir_(s8* const dirpath);
102	u8 rmdir_(s8* const dirpath);	122	u8 rmdir_(s8* const dirpath);
103		123
104		124
105		125
106		126
107	#endif //_FAT16_H	127	#endif //_FAT16_H
108		128
109		129
110		130
111		131
112		132

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