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| #ifndef _FAT16_H |
| #define _FAT16_H |
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| //________________________________________________________________________________________________________________________________________ |
| // |
| // 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); |
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| #endif //_FAT16_H |
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