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Flashfsadds

Data Structures
struct	_FATINMEMORY
struct	_FILE
struct	_FILENODE
struct	_FILENODEINFS
struct	_FLASHFS
Defines
#define	TYPE_DIRECTORY   1
#define	TYPE_FILE   2
#define	TYPE_NULL   0
#define	MAX_FILE_NAME   50
#define	NUMBER_OF_FILES   50
#define	EOF   0
Typedefs
typedef _FILE	FILE
Functions
int	InitFlashFs (void)
FILE *	fileOpen (char *name, char type)
int	fileWrite (FILE *file, void *data, u_int size)
int	fileClose (FILE *file)
int	fileRead (FILE *file, void *data, u_int size)
u_long	fileSize (FILE *file)
int	fileSeek (FILE *file, u_long pos)
int	remove (char *name)
char *	ls (char *dir, char *ret, char *param)
int	format (void)

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Detailed Description

This module provides flash filesystem. Read and write files from/to flash and display filesystem information. \TODO

• c style functions

Note:

• File size is limited to 64k.
• Not handle directory.

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Define Documentation

#define EOF   0

End of file mark.

#define FIRST_FILE_PAGE

Value: (ROOT_PAGE \ + ((sizeof(FILENODEINFS)*NUMBER_OF_FILES+sizeof(FLASHFS))/PAGE_SIZE + 1) \ + MAX_PAGE_NUMBER/(PAGE_SIZE*8) + 1 \ + 1)

#define MAX_FILE_NAME   50

Number of character in filename.

#define NUMBER_OF_FILES   50

Max number of stored files in filessystem.

#define TYPE_DIRECTORY   1

Filesystem file type.

#define TYPE_FILE   2

Filesystem file type.

#define TYPE_NULL   0

Filesystem file type.

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Typedef Documentation

typedef struct _FILE FILE

File descriptor used by read and write function. Created when file is open.

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Function Documentation

int fileClose (  FILE *    file )

Closes opened file. When file was opened for write this method finish write operations and update information in flash. Parameters: file  - file descriptor.

FILE* fileOpen (  char *    name, char    type )

Opens file. File must be open before read/write operations. When file dosn't exist this method create it. Parameters: name  - file name. type  - operation type (read - r or write - w). Returns: file descriptor on succes NULL on fail.

int fileRead (  FILE *    file, void *    data, u_int    size )

Reads data from file. Parameters: file  - file descriptor obteined by fileOpen. data  - pointer to buffer where data will be stored. size  - size of data to read. Returns: number of written bytes on success -1 on fail.

int fileSeek (  FILE *    file, u_long    pos )

Moves file read or write pointer to specified position. Parameters: file  - file descriptor. pos  - pointer position. Returns: 0 on succes - 1 on fail.

u_long fileSize (  FILE *    file )

Reads file size. Parameters: file  - file descriptor. Returns: file size in bytes.

int fileWrite (  FILE *    file, void *    data, u_int    size )

Writes data to file. Parameters: file  - file descriptor obteined from fileOpen. data  - pointer to buffer with data. size  - size of data to write. Returns: number of written bytes on success -1 on fail.

int format (  void    )

Formats filesystem. This method clear all files and all pages in flashfs. Returns: 0 on succes -1 on fail.

int InitFlashFs (  void    )

Inits flash filesystem. Caled it first. Returns: -1 on fail, 0 on success.

char* ls (  char *    dir, char *    ret, char *    param )

Print content of filesystem in specified directory. Parameters: dir  - pointer to buffer containing directory path. ret  - pointer to buffer where output will be stored. param  - formating type (not implemented). Returns: pointer to buffor where output will be stored.

int remove (  char *    name )

Removes file from filesystem. Parameters: name  - file name. Returns: 0 on succes -1 on fail.

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