fat16.c File Reference

#include <stdio.h>
#include <avr/io.h>
#include "mmc.h"
#include "fat16.h"

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Functions
unsigned char	InitFat16 (void)
unsigned char	fopen_ (unsigned char *fname, char mode, File *file)
int	fflush_ (File *file)
void	fclose_ (File *file)
unsigned long	fread_ (void *buffer, unsigned long size, unsigned long count, File *file)
unsigned long	fwrite_ (void *buffer, unsigned long size, unsigned long count, File *file)
int	fseek_ (File *file, long offset, int origin)
int	fgetchar_ (File *file)
unsigned char	fputchar_ (File *file, char c)
unsigned char	fputs_ (File *file, char *string)
char *	fgets_ (char *string, int count, File *file)
unsigned char	fexist_ (unsigned char *fname, File *file)
unsigned int	GetNextCluster (File *file)
unsigned int	FindNextFreeCluster (File *file)
unsigned char	AppendCluster (File *file)
unsigned int	GetFatClusterOffset (File *file)
unsigned int	GetFatSectorIndex (File *file)
unsigned char	CreateDirectoryEntry (unsigned char *fname, unsigned int cluster, File *file, unsigned char attrib)
unsigned char	SeekDirectoryEntry (unsigned char *fname, File *file)
unsigned char	ScanSubDirectories (unsigned char *fname, File *file)
void	SeperateFileName (unsigned char *fname, unsigned char *name)

Variables
unsigned char	SectorsPerCluster = 0
unsigned char	FatCopies = 0
unsigned int	PossibleRootEntries = 0
unsigned int	SectorsPerFat = 0
unsigned long	ReservedSectors = 0
unsigned long	FirstPartitionSector = 0
unsigned long	FileAllocationTable = 0
unsigned long	RootDirectory = 0
unsigned long	FirstDataCluster = 0
unsigned char	FileBuffer [512]
struct DirEntry *	DirectoryEntry
struct FatEntry *	Fat

Function Documentation

unsigned char AppendCluster

(

File *

file

)

Definition at line 614 of file fat16.c.

References afile::cluster_pointer, FileAllocationTable, FileBuffer, FindNextFreeCluster(), FirstDataCluster, GetFatClusterOffset(), GetFatSectorIndex(), FatEntry::next_cluster, SDC_GetSector, SDC_PutSector, and SectorsPerCluster.

Referenced by fputchar_().

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unsigned char CreateDirectoryEntry	(	unsigned char *	fname,
		unsigned int	cluster,
		File *	file,
		unsigned char	attrib
	)

Definition at line 687 of file fat16.c.

References DirEntry::attribute, afile::directory_index, afile::directory_sector, FileBuffer, DirEntry::name, PossibleRootEntries, RootDirectory, SDC_GetSector, SDC_PutSector, DirEntry::size, and DirEntry::startcluster.

Referenced by fopen_().

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void fclose_

(

File *

file

)

Definition at line 195 of file fat16.c.

References afile::attribute, afile::byte_index, afile::cluster_pointer, afile::directory_index, afile::directory_sector, fflush_(), afile::fileposition, afile::filesize, afile::mode, afile::sector_in_buffer, afile::sector_index, and afile::start_cluster.

Referenced by fexist_(), and main().

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unsigned char fexist_	(	unsigned char *	fname,
		File *	file
	)

Definition at line 505 of file fat16.c.

References fclose_(), and fopen_().

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int fflush_

(

File *

file

)

Definition at line 159 of file fat16.c.

References afile::byte_index, afile::cluster_pointer, DirEntry::date, afile::directory_index, afile::directory_sector, FileBuffer, afile::filesize, afile::mode, SDC_GetSector, SDC_PutSector, afile::sector_index, DirEntry::size, and DirEntry::time.

Referenced by fclose_().

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int fgetchar_

(

File *

file

)

Definition at line 356 of file fat16.c.

References afile::byte_index, afile::cluster_pointer, FileBuffer, afile::filesize, GetNextCluster(), SDC_GetSector, afile::sector_in_buffer, afile::sector_index, and SectorsPerCluster.

Referenced by fgets_(), and fread_().

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char* fgets_	(	char *	string,
		int	count,
		File *	file
	)

Definition at line 463 of file fat16.c.

References fgetchar_().

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unsigned int FindNextFreeCluster

(

File *

file

)

Definition at line 574 of file fat16.c.

References FileAllocationTable, FileBuffer, FatEntry::next_cluster, SDC_GetSector, SDC_PutSector, afile::sector_in_buffer, and SectorsPerFat.

Referenced by AppendCluster(), and fopen_().

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unsigned char fopen_	(	unsigned char *	fname,
		char	mode,
		File *	file
	)

Definition at line 97 of file fat16.c.

References _FILE, afile::attribute, afile::byte_index, afile::cluster_pointer, CreateDirectoryEntry(), afile::directory_index, afile::directory_sector, afile::fileposition, afile::filesize, FindNextFreeCluster(), FirstDataCluster, fseek_(), afile::mode, ScanSubDirectories(), afile::sector_in_buffer, afile::sector_index, SectorsPerCluster, SeekDirectoryEntry(), SeperateFileName(), and afile::start_cluster.

Referenced by fexist_(), and main().

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unsigned char fputchar_	(	File *	file,
		char	c
	)

Definition at line 400 of file fat16.c.

References AppendCluster(), afile::byte_index, afile::cluster_pointer, FileBuffer, afile::fileposition, afile::filesize, SDC_PutSector, afile::sector_index, and SectorsPerCluster.

Referenced by fputs_(), and fwrite_().

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unsigned char fputs_	(	File *	file,
		char *	string
	)

Definition at line 443 of file fat16.c.

References fputchar_().

Referenced by main().

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unsigned long fread_	(	void *	buffer,
		unsigned long	size,
		unsigned long	count,
		File *	file
	)

Definition at line 221 of file fat16.c.

References fgetchar_(), and DirEntry::size.

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int fseek_	(	File *	file,
		long	offset,
		int	origin
	)

Definition at line 286 of file fat16.c.

References afile::byte_index, afile::cluster_pointer, FileBuffer, afile::fileposition, afile::filesize, GetNextCluster(), SDC_GetSector, afile::sector_index, SectorsPerCluster, and afile::start_cluster.

Referenced by fopen_().

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unsigned long fwrite_	(	void *	buffer,
		unsigned long	size,
		unsigned long	count,
		File *	file
	)

Definition at line 254 of file fat16.c.

References fputchar_(), and DirEntry::size.

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unsigned int GetFatClusterOffset

(

File *

file

)

Definition at line 646 of file fat16.c.

References afile::cluster_pointer, FirstDataCluster, and SectorsPerCluster.

Referenced by AppendCluster(), and GetFatSectorIndex().

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unsigned int GetFatSectorIndex

(

File *

file

)

Definition at line 664 of file fat16.c.

References GetFatClusterOffset().

Referenced by AppendCluster().

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unsigned int GetNextCluster

(

File *

file

)

Definition at line 526 of file fat16.c.

References afile::cluster_pointer, FileAllocationTable, FileBuffer, FirstDataCluster, RootDirectory, SDC_GetSector, afile::sector_in_buffer, and SectorsPerCluster.

Referenced by fgetchar_(), fseek_(), and SeekDirectoryEntry().

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unsigned char InitFat16

(

void

)

Definition at line 71 of file fat16.c.

References FatCopies, FileAllocationTable, FileBuffer, FirstDataCluster, FirstPartitionSector, MBR_SECTOR, PossibleRootEntries, ReservedSectors, RootDirectory, SDC_GetSector, SectorsPerCluster, and SectorsPerFat.

Referenced by main().

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unsigned char ScanSubDirectories	(	unsigned char *	fname,
		File *	file
	)

Definition at line 790 of file fat16.c.

References _DIRECTORY, _FILE, afile::attribute, afile::cluster_pointer, RootDirectory, and SeekDirectoryEntry().

Referenced by fopen_().

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unsigned char SeekDirectoryEntry	(	unsigned char *	fname,
		File *	file
	)

Definition at line 736 of file fat16.c.

References afile::attribute, DirEntry::attribute, afile::cluster_pointer, afile::directory_index, afile::directory_sector, FileBuffer, afile::filesize, FirstDataCluster, GetNextCluster(), DirEntry::name, SDC_GetSector, SectorsPerCluster, DirEntry::size, afile::start_cluster, and DirEntry::startcluster.

Referenced by fopen_(), and ScanSubDirectories().

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void SeperateFileName	(	unsigned char *	fname,
		unsigned char *	name
	)

Definition at line 854 of file fat16.c.

Referenced by fopen_().

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Variable Documentation

struct DirEntry* DirectoryEntry

Definition at line 56 of file fat16.c.

struct FatEntry* Fat

Definition at line 57 of file fat16.c.

unsigned char FatCopies = 0

Definition at line 46 of file fat16.c.

Referenced by InitFat16().

unsigned long FileAllocationTable = 0

Definition at line 51 of file fat16.c.

Referenced by AppendCluster(), FindNextFreeCluster(), GetNextCluster(), and InitFat16().

unsigned char FileBuffer[512]

Definition at line 55 of file fat16.c.

Referenced by AppendCluster(), CreateDirectoryEntry(), fflush_(), fgetchar_(), FindNextFreeCluster(), fputchar_(), fseek_(), GetNextCluster(), InitFat16(), and SeekDirectoryEntry().

unsigned long FirstDataCluster = 0

Definition at line 53 of file fat16.c.

Referenced by AppendCluster(), fopen_(), GetFatClusterOffset(), GetNextCluster(), InitFat16(), and SeekDirectoryEntry().

unsigned long FirstPartitionSector = 0

Definition at line 50 of file fat16.c.

Referenced by InitFat16().

unsigned int PossibleRootEntries = 0

Definition at line 47 of file fat16.c.

Referenced by CreateDirectoryEntry(), and InitFat16().

unsigned long ReservedSectors = 0

Definition at line 49 of file fat16.c.

Referenced by InitFat16().

unsigned long RootDirectory = 0

Definition at line 52 of file fat16.c.

Referenced by CreateDirectoryEntry(), GetNextCluster(), InitFat16(), and ScanSubDirectories().

unsigned char SectorsPerCluster = 0

Definition at line 45 of file fat16.c.

Referenced by AppendCluster(), fgetchar_(), fopen_(), fputchar_(), fseek_(), GetFatClusterOffset(), GetNextCluster(), InitFat16(), and SeekDirectoryEntry().

unsigned int SectorsPerFat = 0

Definition at line 48 of file fat16.c.

Referenced by FindNextFreeCluster(), and InitFat16().