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Message |
Neo2a
Joined: 02 May 2009
Posts: 7
Location: Hungary
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| SD card problem dsPIC33FJ128GP710A |
 Posted: Tue Aug 21, 2012 3:09 am |
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Dear programmers,
I have a problem with uSD card handling.
The program is initialized a SD card well.
After it write a file ("cmc.txt")
Answer on serial line is "OK" but the card is still empty.
Please help me what's wrong in my code?
http://juropnet.hu/~ipucz/Project.zip
Thank you!
Best regards
Steve |
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ezflyr
Joined: 25 Oct 2010
Posts: 1019
Location: Tewksbury, MA
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| Posted: Tue Aug 21, 2012 7:31 am |
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Hi,
Post your code here. No one is interested to go out to a random Hungarian website to download your .zip file. Don't make helping you to solve your problem more difficult than it has to be - if you do, your plea for help will just be ignored by a majority of the forum users.
I also noticed that you asked almost exactly the same question back in May. You had one response asking for a copy of your schematic in PDF format (because your posted schematic was in a proprietary format), but you never responded to the request. Are you really serious about solving this problem?
John |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Tue Aug 21, 2012 8:37 am |
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What is the size of your SD card? The CCS library only supports standard SD cards up to 4Gb, not the High Capacity cards.
Perhaps your card has a Master Boot Record? The CCS driver often has problems in handling these. Try formatting the card in a photo camera.
Have a look at the Code Library section of this forum you will find other SD drivers there. Also a few bugfixes have been posted for the CCS library: http://www.ccsinfo.com/forum/viewtopic.php?t=43402
Before posting your answers on this forum, check the first sticky post in this forum. It gives some guidelines for posting questions here. |
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Neo2a
Joined: 02 May 2009
Posts: 7
Location: Hungary
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Neo2a
Joined: 02 May 2009
Posts: 7
Location: Hungary
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| All modification is done |
| Posted: Wed Aug 22, 2012 2:34 am |
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Modifications in mmcsd.c
Search for uint32_t g_mmcsdBufferAddress;
and add under it:
| Code: |
uint32_t g_mmcsdPartitionOffset;
|
Next, just before the "mmcsd_init" function add a new function:
| Code: |
void mmcsd_check_part(uint16_t off)
{
if (g_mmcsd_buffer[off + 0] == 0x80)
{
// active partition
uint8_t t;
t = g_mmcsd_buffer[off + 4];
if (t == 0x04 || t == 0x06 || t == 0x0B)
{
// FAT16 or FAT32 partition
g_mmcsdPartitionOffset = make32(
g_mmcsd_buffer[off + 11], g_mmcsd_buffer[off + 10],
g_mmcsd_buffer[off + 9], g_mmcsd_buffer[off + 8]) * MMCSD_MAX_BLOCK_SIZE;
}
}
}
|
In the "mmcsd_init" function, right after the line:
| Code: |
r1 = mmcsd_load_buffer();
|
Add the lines:
| Code: |
g_mmcsdPartitionOffset = 0;
mmcsd_check_part(0x1EE);
mmcsd_check_part(0x1DE);
mmcsd_check_part(0x1CE);
mmcsd_check_part(0x1BE);
|
Finally, in the function "mmcsd_move_buffer", after the line:
| Code: |
new_block = new_addr - (new_addr % MMCSD_MAX_BLOCK_SIZE);
|
Add the line:
| Code: |
new_block += g_mmcsdPartitionOffset;
|
Modifications in mmcsd.c
The CCS "fat.c" functions "get_next_addr" and "get_prev_addr" do not correctly handle cluster transitions. The following are corrected functions, so replace the function with the following code:
| Code: |
signed int get_next_addr(int32* my_addr)
{
int32 temp;
#ifdef FAT32
int32 c;
#else
int16 c;
#endif
// check to make sure that the next iteration will give us a contiguous address
temp = *my_addr + 1;
if((temp > Data_Start) && ((temp - Data_Start) % Bytes_Per_Cluster == 0))
{
// convert the current address into the address of where information about
// the address is stored in the FAT, and put this value into the current address
c = addr_to_cluster(temp - 1);
if(get_next_cluster(&c) == EOF)
return EOF;
if (c >=
#ifdef FAT32
0x0FFFFFF8
#else
0xFFF8
#endif
)
return EOF;
temp = cluster_to_addr(c);
}
*my_addr = temp;
return GOODEC;
}
|
Further, get_prev_addr() needs to be updated:
| Code: |
signed int8 get_prev_addr(int32* my_addr)
{
int32 temp;
#ifdef FAT32
int32 c;
#else
int16 c;
#endif
temp = *my_addr;
// if we're trying to go backwards one entry from the beginning of the root,
// we won't be able to...
if(temp <= Root_Dir)
return GOODEC;
// check to make sure that the next iteration will give us a contiguous address
if((temp >= Data_Start) && ((temp - Data_Start) % Bytes_Per_Cluster == 0))
{
c = addr_to_cluster(temp);
if(get_prev_cluster(&c) == EOF)
return EOF;
temp = cluster_to_addr(c) + Bytes_Per_Cluster;
}
*my_addr = temp - 1;
return GOODEC;
}
|
In fat_init() function search for the following lines
| Code: |
#ifdef FAT32
Data_Start = Bytes_Per_Cluster + Root_Dir;
#else // FAT16
|
and replace it with the following code (i.e. remove "Bytes_Per_Cluster +"):
| Code: |
#ifdef FAT32
Data_Start = Root_Dir;
#else // FAT16
|
And finally, get_short_file_name() needs to be replaced with the following code:
| Code: |
signed int get_short_file_name(int32 file_entry_addr, char sname[], int8 type)
{
int
buf,
i,
j = 0;
// one short file name has, at the most, 11 characters
for(i = 0; i < 11; ++i)
{
// read in a character
if(mmcsd_read_data(i + file_entry_addr, 1, &buf) != GOODEC)
return EOF;
// convert the character
if(buf != ' ')
{
if (i == 8 && type != 0x10) sname[j++] = '.';
sname[j++] = tolower(buf);
}
}
if (sname[j - 1] == '.') --j;
sname[j] = '\0';
return GOODEC;
} |
[/code] |
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Neo2a
Joined: 02 May 2009
Posts: 7
Location: Hungary
|
| After all modification |
| Posted: Wed Aug 22, 2012 2:36 am |
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After all modification implemented into the code
The fat.c
| Code: |
#ifndef FAT_PIC_C
#define FAT_PIC_C
|
++++++++++++++++++++++++
Code deleted.
Sorry, modified code is still CCS code. Rule #10 applies:
10. Don't post the CCS example code or drivers, or ask for such code and drivers.
A list of mods is OK, but not the complete driver file.
Forum Rules:
http://www.ccsinfo.com/forum/viewtopic.php?t=26245
- Forum Moderator
++++++++++++++++++++++++ |
|
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Neo2a
Joined: 02 May 2009
Posts: 7
Location: Hungary
|
| MMCSD content |
| Posted: Wed Aug 22, 2012 2:40 am |
|
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After modifications implemented the
mmcsd.c content is
| Code: |
#ifndef FAT_PIC_C
#define FAT_PIC_C
#include <ctype.h>
#include <string.h>
#case
//////////////////////
/// ///
/// Useful Defines ///
/// ///
//////////////////////
/// Define your FAT type here ///
#define FAT16
//#define FAT32
/// For faster single-file writing, uncomment this line below ///
//#define FAST_FAT
/// Everything else ///
#define MAX_FILE_NAME_LENGTH 0x20 // the maximum length of a file name for our FAT, including /0 terminator
#define STREAM_BUF_SIZE 0x20 // how big the FILE buffer is. 0x20 is optimal
//////////////////////////////////////////////////////////////////
#define EOF -1
#define GOODEC 0
#define fatpos_t int32
#define SEEK_CUR 0
#define SEEK_END 1
#define SEEK_SET 2
////////////////////////
/// ///
/// Global Variables ///
/// ///
////////////////////////
int16
Bytes_Per_Cluster, // number of addressable bytes per cluster
FAT_Start; // when the first FAT begins
int32
Data_Start, // when data starts
FAT_Length, // the length of one FAT
Next_Free_Clust, // where the next free cluster is
Root_Dir; // when the root directory starts
enum filetype
{
Data_File, // the stream is pointing to a binary, data file
Directory, // the stream is pointing to a directory
None // the stream isn't currently pointing to anything
};
enum ioflags
{
Closed = 0x00,
Read = 0x01,
Write = 0x02,
Append = 0x04,
Binary = 0x08,
EOF_Reached = 0x10,
Read_Error = 0x20,
Write_Error = 0x40,
File_Not_Found = 0x80
};
struct iobuf
{
fatpos_t
Bytes_Until_EOF, // how many bytes until the stream's end of file
Cur_Char, // the current byte that the stream is pointing at
Entry_Addr, // the entry address of the file that is associated with the stream
Parent_Start_Addr, // the parent's start adddress of the file that is associated with the stream
Size, // the size of the file that is associated with the stream
Start_Addr; // the beginning of the data in the file that is associated with the stream
enum filetype File_Type; // the type of file that is associated with the stream
enum ioflags Flags; // any associated input/output flag
int Buf[STREAM_BUF_SIZE]; // this is a buffer so that during fatputc() or fatgetc()
// the media won't have to be read at every character
};
typedef struct iobuf FILE;
///////////////////////////
/// ///
/// Function Prototypes ///
/// ///
///////////////////////////
/// Standard C Functions ///
signed int fatopen(char fname[], char mode[], FILE* stream);
signed int fatreopen(char fname[], char mode[], FILE* stream);
signed int fatclose(FILE* stream);
signed int fatgetc(FILE* stream);
signed int fatputc(int ch, FILE* stream);
char* fatgets(char* str, int num, FILE* stream);
signed int fatputs(char* str, FILE* stream);
signed int fatprintf(FILE* stream);
signed int fatgetpos(FILE* stream, fatpos_t* position);
signed int fatsetpos(FILE* stream, fatpos_t* position);
signed int fatseek(FILE* stream, int32 offset, int origin);
signed int fateof(FILE* stream);
signed int faterror(FILE* stream);
signed int fatread(void* buffer, int size, int32 num, FILE* stream);
signed int fatwrite(void* buffer, int size, int32 count, FILE* stream );
signed int fatflush(FILE* stream);
signed int remove(char* fname);
void clearerr(FILE* stream);
void rewind(FILE* stream);
fatpos_t fattell(FILE* stream);
/// Non-Standard C Functions ///
signed int rm_file(char fname[]);
signed int rm_dir(char dname[]);
signed int mk_file(char fname[]);
signed int mk_dir(char dname[]);
/// Functions' Utility Functions ///
signed int set_file(char fname[], int attrib, FILE* stream);
signed int get_file_name(int32 file_entry_addr, char name[]);
signed int set_file_name(int32 parent_dir_addr, int32* entry_addr, char name[]);
signed int get_short_file_name(int32 file_entry_addr, char sname[], int type);
signed int make_short_file_name(int32 parent_dir_addr, char fname[], char sname[]);
int long_name_chksum (int* pFcbName);
signed int check_invalid_char(char fname[]);
#ifdef FAT32
signed int get_next_free_cluster(int32* my_cluster);
signed int dealloc_clusters(int32 start_cluster);
signed int alloc_clusters(int32 start_cluster, int32* new_cluster_addr);
signed int clear_cluster(int32 cluster);
signed int write_fat(int32 cluster, int32 data);
#else // FAT16
signed int get_next_free_cluster(int16* my_cluster);
signed int dealloc_clusters(int16 start_cluster);
signed int alloc_clusters(int16 start_cluster, int32* new_cluster_addr);
signed int clear_cluster(int16 cluster);
signed int write_fat(int16 cluster, int16 data);
#endif // #ifdef FAT32
signed int get_next_file(FILE* stream);
signed int get_prev_file(FILE* stream);
signed int get_next_free_addr(int32* my_addr);
signed int get_next_free_entry(int32* start_addr);
signed int get_next_entry(int32* start_addr);
signed int get_prev_entry(int32* start_addr);
signed int read_buffer(FILE* stream, int* val);
signed int write_buffer(FILE* stream, int val);
void fill_entry(char the_entry[], char val, int8 start_ind);
void disp_timestamp(int16 timestamp);
void disp_datestamp(int16 datestamp);
/// Data Utility Functions ///
signed int fat_init();
#ifdef FAT32
signed int get_next_cluster(int32* my_cluster);
signed int get_prev_cluster(int32* my_cluster);
int32 cluster_to_addr(int32 cluster);
int32 addr_to_cluster(int32 addr);
#else // FAT16
signed int get_next_cluster(int16* my_cluster);
signed int get_prev_cluster(int16* my_cluster);
int32 cluster_to_addr(int16 cluster);
int16 addr_to_cluster(int32 addr);
#endif // #ifdef FAT32
signed int get_next_addr(int32* my_addr);
signed int get_prev_addr(int32* my_addr);
signed int format(int32 DskSize);
/// Debugging Utility Functions ///
signed int disp_folder_contents(char foldername[]);
signed int dump_addr(int32 from, int32 to);
signed int dump_clusters(int32 from, int32 to);
void disp_fat_stats();
signed int fatprintfinfo(FILE* stream);
////////////////////////////////
/// ///
/// Function Implementations ///
/// ///
////////////////////////////////
/// Standard C Functions ///
/*
signed int fatopen(char fname[], char mode[], FILE* stream)
Summary: This will open up a file stream for reading, writing, or appending.
Param fname: The full path of the file to open.
Param mode: The mode to open up the stream into.
"r" = Read
"w" = Write
"a" = Append
"rb", "wb", "ab" = Read, Write, or Append in Binary mode
Param stream: The stream to open up.
Returns: EOF if there was a problem, GOODEC if everything went okay.
Note: fname must be in the form of /filename.fil for a file in the root directory
/Directory/filename.fil for a file in a subdirectory of root
/Directory/Subdirectory/filename.fil and so on...
Note: Standard C will make a file in case a file isn't found,
however due to recursion this is not possible in CCSC.
*/
signed int fatopen(char fname[], char mode[], FILE* stream)
{
int fname_parse_pos = 1; // the current index of the fname character
char target_file[MAX_FILE_NAME_LENGTH]; // temporary buffer to hold names of files
FILE cur_stream; // this will be the stream that will be returned if all goes well
#ifndef FAST_FAT
int
depth = 0, // how many subdirectories deep the file is
target_file_parse_pos; // the current index of the target_file character
#endif // #ifndef FAST_FAT
// set flags
#ifdef FAST_FAT
switch(mode[0])
{
case 'w':
cur_stream.Flags = Write;
break;
case 'a':
cur_stream.Flags = Append;
break;
default:
return EOF;
}
// start looking for the file, start at root
cur_stream.Start_Addr = cur_stream.Parent_Start_Addr = Root_Dir;
while(fname[fname_parse_pos] != '\0')
{
target_file[fname_parse_pos - 1] = fname[fname_parse_pos];
fname_parse_pos += 1;
}
target_file[fname_parse_pos] = '\0';
// find the file inside of its subdirectory
if(set_file(target_file, 0x20, &cur_stream) != GOODEC)
{
cur_stream.Flags |= File_Not_Found;
*stream = cur_stream;
return EOF;
}
// at this point, we've found the file
*stream = cur_stream;
return GOODEC;
#else // NO FAST_FAT
switch(mode[0])
{
case 'r':
cur_stream.Flags = Read;
break;
case 'w':
cur_stream.Flags = Write;
break;
case 'a':
cur_stream.Flags = Append;
break;
default:
return EOF;
}
if(mode[1] == 'b')
cur_stream.Flags |= Binary;
// start looking for the file, start at root
cur_stream.Start_Addr = cur_stream.Parent_Start_Addr = Root_Dir;
// figure out how deep we have to go, count how many '/' we have in the string
while(fname[fname_parse_pos] != '\0')
{
if(fname[fname_parse_pos] == '/')
depth++;
fname_parse_pos += 1;
}
// start the fname index at 1 to skip over the '/'
fname_parse_pos = 1;
// open up to the subdirectory, if possible
while(depth > 0)
{
// find the name of our next target directory
target_file_parse_pos = 0;
while(fname[fname_parse_pos] != '/')
{
// check to make sure that we're not at the end of a poorly formatted string
if(fname[fname_parse_pos] == '\0')
return EOF;
// fill up the buffer and increment the indexes
target_file[target_file_parse_pos] = fname[fname_parse_pos];
fname_parse_pos += 1;
target_file_parse_pos += 1;
}
// increment the fname index one more because it's currently pointing at the '/'
fname_parse_pos += 1;
// tack on a \0 to the end of the target file to terminate the string
target_file[target_file_parse_pos] = '\0';
// check to see if the directory exists and open it if possible, otherwise exit because the directory doesn't exist
if(set_file(target_file, 0x10, &cur_stream) != GOODEC)
{
cur_stream.Flags |= File_Not_Found;
*stream = cur_stream;
return EOF;
}
depth -= 1;
}
// check to see if we're trying to open just a directory
if(fname[fname_parse_pos] == '\0')
{
*stream = cur_stream;
return GOODEC;
}
// now that we have the location of the subdirectory that the file is in, attempt to open the file
target_file_parse_pos = 0;
while(fname[fname_parse_pos] != '\0')
{
// fill up the buffer and increment the indexes
target_file[target_file_parse_pos] = fname[fname_parse_pos];
fname_parse_pos += 1;
target_file_parse_pos += 1;
}
// tack on a \0 to the end of the target file to terminate the string
target_file[target_file_parse_pos] = '\0';
// find the file inside of its subdirectory
if(set_file(target_file, 0x20, &cur_stream) != GOODEC)
{
cur_stream.Flags |= File_Not_Found;
*stream = cur_stream;
return EOF;
}
// at this point, we've found the file
*stream = cur_stream;
return GOODEC;
#endif // #ifdef FAST_FAT
}
/*
signed int fatreopen(char fname[], char mode[], FILE* old_stream, FILE* new_stream)
Summary: This will close a stream and then reopen it using new parameters.
Param fname: The full path of the file to open.
Param mode: The mode to open up the stream into.
"r" = Read
"w" = Write
"a" = Append
"rb", "wb", "ab" = Read, Write, or Append in Binary mode
Param stream: The stream to close and reopen.
Returns: EOF if there was a problem, GOODEC if everything went okay.
Note: fname must be in the form of /filename.fil for a file in the root directory
/Directory/filename.fil for a file in a subdirectory of root
/Directory/Subdirectory/filename.fil and so on...
Note: Standard C will make a file in case a file isn't found,
however due to recursion this is not possible in CCSC.
*/
signed int fatreopen(char fname[], char mode[], FILE* stream)
{
// close the old stream
if(fatclose(stream) == EOF)
return EOF;
// open the new stream
if(fatopen(fname, mode, stream) == EOF)
return EOF;
return GOODEC;
}
/*
signed int fatclose(FILE* stream)
Summary: Closes a stream and commits any changes done to the file.
Param: The stream to close.
Returns: EOF if there was a problem, 0 if everything went okay.
*/
signed int fatclose(FILE* stream)
{
int ec = 0;
int32 first_cluster;
// commit data back to the stream's entry, if needed
if((stream->Flags & Write) || (stream->Flags & Append))
{
// write the new size of the file
if(mmcsd_write_data(stream->Entry_Addr + 0x1C, 4, &(stream->Size)) != GOODEC)
{
stream->Flags |= Write_Error;
return EOF;
}
// check to see if the first cluster is already linked in the file
ec += mmcsd_read_data(stream->Entry_Addr + 0x14, 2, (int16*)&first_cluster + 1);
ec += mmcsd_read_data(stream->Entry_Addr + 0x1A, 2, &first_cluster);
if(ec != GOODEC)
{
stream->Flags |= Read_Error;
return EOF;
}
// write the first cluster to the entry if needed
if(first_cluster == 0)
{
// convert the start address to a cluster number
first_cluster = addr_to_cluster(stream->Start_Addr);
ec += mmcsd_write_data(stream->Entry_Addr + 0x14, 2, (int16*)&first_cluster + 1);
ec += mmcsd_write_data(stream->Entry_Addr + 0x1A, 2, &first_cluster);
if(ec != GOODEC)
{
stream->Flags |= Write_Error;
return EOF;
}
}
// dump the remaining buffer to the card
if(fatflush(stream) == EOF)
return EOF;
}
// nullify the data
stream->Cur_Char = 0;
stream->Entry_Addr = 0;
stream->Size = 0;
stream->Start_Addr = 0;
stream->Flags = 0;
return 0;
}
/*
signed int fatgetc(FILE* stream)
Summary: Gets a character from a stream.
Param: The stream to get a character from.
Returns: The character that was gotten from the stream,
EOF if the stream has reached the end of the file or doesn't have permissions to read,
*/
signed int fatgetc(FILE* stream)
{
char ch; // character read in
// check to see if the stream has proper permissions to read
if(stream->Flags & Read)
{
// when the number of bytes until eof hit zero, we know we are at the end of any file
if(stream->Bytes_Until_EOF == 0)
{
stream->Flags |= EOF_Reached;
return EOF;
}
// read in the next byte in the buffer
if(read_buffer(stream, &ch) == EOF)
return EOF;
// a 0x00 will signify the end of a non-binary file
if((ch == '\0') && !(stream->Flags & Binary))
{
stream->Flags |= EOF_Reached;
return EOF;
}
// get the next contiguous address of the stream
if(get_next_addr(&(stream->Cur_Char)) != GOODEC)
return EOF;
// we just got 1 byte closer to the end of the file
stream->Bytes_Until_EOF -= 1;
return ch;
}
// if the stream doesn't have proper permissions to read, return an EOF
else
return EOF;
}
/*
signed int fatputc(int ch, FILE* stream)
Summary: Puts a character into a stream.
Param ch: The character to put into the stream.
Param stream: The stream to put a character into.
Returns: The character that was put into the stream,
EOF if the stream doesn't have permissions to write, or if a problem happened.
*/
signed int fatputc(int ch, FILE* stream)
{
// check to see if the stream has proper permissions to write
if(((stream->Flags & Write) || (stream->Flags & Append)) && (stream->File_Type == Data_File))
{
// if there isn't any space allocated yet, allocate some
if(stream->Cur_Char < Data_Start)
{
if(get_next_free_cluster(&Next_Free_Clust) == EOF)
return EOF;
#ifdef FAT32
if(write_fat(Next_Free_Clust, 0x0FFFFFFF) == EOF)
return EOF;
#else // FAT16
if(write_fat(Next_Free_Clust, 0xFFFF) == EOF)
return EOF;
#endif // #ifdef FAT32
if(clear_cluster(Next_Free_Clust) == EOF)
return EOF;
stream->Cur_Char = stream->Start_Addr = cluster_to_addr(Next_Free_Clust);
}
// write the next character to the buffer
if(write_buffer(stream, ch) == EOF)
return EOF;
// get the next address, increment Cur_Char
if(get_next_addr(&(stream->Cur_Char)) == EOF)
{
// write the current buffer to the end of the current cluster
if(mmcsd_write_data(stream->Cur_Char - STREAM_BUF_SIZE + 1, STREAM_BUF_SIZE, stream->Buf) != GOODEC)
{
stream->Flags |= Write_Error;
return EOF;
}
// start looking for a new cluster to allocate
if(alloc_clusters(addr_to_cluster(stream->Cur_Char), &(stream->Cur_Char)) == EOF)
return EOF;
}
// our file just got bigger by 1 byte
stream->Size += 1;
return ch;
}
// if the stream doesn't have proper permissions to write, return an EOF
else
return EOF;
}
/*
char* fatgets(char* str, int num, FILE* stream)
Summary: Reads characters from a stream into a string.
Param str: A pointer to the beginning of the string to put characters into.
Param num: The number of characters to put into the string - 1.
Param stream: The stream to read from.
Returns: A pointer to the most recently added character, or NULL if there was an error.
Note: If a newline is read from the stream, then str will be terminated with a newline.
If num - 1 or EOF is reached, then str will be null terminated.
*/
char* fatgets(char* str, int num, FILE* stream)
{
int i; // counter for loops
// loop until num - 1
for(i = 0; i < num - 1; i += 1)
{
str[i] = fatgetc(stream);
if(str[i] == '\n')
return str;
if(str[i] == EOF)
break;
}
// close off str with a null terminator
str[i] = '\0';
return str;
}
/*
signed int fatputs(char* str, FILE* stream)
Summary: Writes characters from a string into a stream.
Param str: A pointer to the beginning of the string to write into the stream.
Param stream: The stream to write into.
Returns: EOF if there was a problem, GOODEC if everything went okay.
*/
signed int fatputs(char* str, FILE* stream)
{
int i = 0; // counter for loops
// fatputc every character in the stream
while(str[i] != '\0')
{
if(fatputc(str[i], stream) == EOF)
return EOF;
i += 1;
}
return GOODEC;
}
/*
signed int fatprintf(FILE* stream)
Summary: This will print off the entire contents of the stream to the console.
Param: The stream to print off.
Returns: The last character printed off to the console.
*/
signed int fatprintf(FILE* stream)
{
signed int ch; // character read in
// keep on printf any characters read in as long as we don't run into an end of file or a media error
do
{
ch = fatgetc(stream);
printf("%c", ch);
} while(ch != EOF);
return ch;
}
/*
signed int fatgetpos(FILE* stream, fatpos_t* position)
Summary: Returns the current position of where the stream is pointing to relative to the beginning of the stream.
Param stream: The stream to get the position of.
Param position: A pointer to a variable put the current position of the pointer into.
Returns: 0 on success.
*/
signed int fatgetpos(FILE* stream, fatpos_t* position)
{
*position = stream->Size - stream->Bytes_Until_EOF;
return 0;
}
/*
signed int fatsetpos(FILE* stream, fatpos_t* position)
Summary: Sets the current position of where the stream is pointing to in memory relative to the beginning of the stream.
Param stream: The stream to set the position of.
Param position: A pointer the a variable that has the value of the new position.
Returns: 0 on success, or EOF if there was error.
*/
signed int fatsetpos(FILE* stream, fatpos_t* position)
{
#ifndef FAST_FAT
#ifdef FAT32
int32 cur_cluster; // the current cluster we're pointing to
#else // FAT16
int16 cur_cluster; // the current cluster we're pointing to
#endif // #ifdef FAT32
int32 i; // pointer to memory
#endif // #ifndef FAST_FAT
// check to see if we want to just rewind the file
if(*position == 0)
{
rewind(stream);
return GOODEC;
}
// this whole process is much different and easier if we're writing or appending at a spot after EOF
// this will essentially write null characters to the file from EOF to the desired position
if(((stream->Flags & Write) || (stream->Flags & Append)) && (stream->Size < *position))
{
while(stream->Size < *position)
if(fatputc('\0', stream) == EOF)
return EOF;
return 0;
}
#ifdef FAST_FAT
stream->Cur_Char = stream->Start_Addr + *position;
#else // NO FAST_FAT
// figure out how many clusters into the file the position is to be set to
i = *position / Bytes_Per_Cluster;
cur_cluster = addr_to_cluster(stream->Start_Addr);
// head to that cluster
while(i > 0)
{
if(get_next_cluster(&cur_cluster) != GOODEC)
return EOF;
i -= 1;
}
// head to the correct cluster
stream->Cur_Char = cluster_to_addr(cur_cluster);
// now that we're in the correct cluster, tack on the remaining position
stream->Cur_Char += (*position % Bytes_Per_Cluster);
if(stream->Flags & Read)
{
// we now need to change how far it is until EOF
stream->Bytes_Until_EOF = stream->Size - *position;
// fill up the buffer
if(mmcsd_read_data(stream->Cur_Char, STREAM_BUF_SIZE, stream->Buf) != GOODEC)
{
stream->Flags |= Read_Error;
return EOF;
}
}
else
stream->Size = *position;
#endif // #ifdef FAST_FAT
return 0;
}
/*
signed int fatseek(FILE* stream, int32 offset, int origin)
Summary: This will set the position of the file stream according to the input. The EOF flag will also be cleared.
Param stream: The stream to set the position of.
Param offset: How many bytes relative of origin the file stream position will be set.
Param origin: This will be one of 3 values...
SEEK_CUR: Set position relative to the current stream position.
SEEK_END: Set position relative to the end of the stream.
SEEK_SET: Set position relative to the beginning of the stream.
Returns: 0 on success, or EOF if there was error.
*/
signed int fatseek(FILE* stream, int32 offset, int origin)
{
int32 myoffset; // since fatsetpos requires a pointer to a variable, we need this here
switch(origin)
{
case SEEK_CUR:
myoffset = stream->Cur_Char + offset;
if(fatsetpos(stream, &myoffset) != 0)
return EOF;
break;
case SEEK_END:
myoffset = stream->Size - offset;
if(fatsetpos(stream, &myoffset) != 0)
return EOF;
break;
case SEEK_SET:
myoffset = offset;
if(fatsetpos(stream, &myoffset) != 0)
return EOF;
break;
default:
return EOF;
}
// clear the EOF flag
stream->Flags &= 0xEF;
return GOODEC;
}
/*
signed int fateof(FILE* stream)
Summary: Determines whether or not the stream is at the end of the file.
Param: The stream to query for EOF.
Returns: A non-zero value if the file is at EOF,
0 if the file is not at EOF.
*/
signed int fateof(FILE* stream)
{
return stream->Flags & EOF_Reached;
}
/*
signed int fatread(void* buffer, int size, int32 num, FILE* stream)
Summary: Fills up an array with data from a stream.
Param buffer: A pointer to the beginning of an array of any type.
Param size: How many bytes each element in the array is.
Param num: How many elements to fill in the array.
Param stream: The stream to read from.
Returns: How many values were written to the array.
*/
signed int fatread(void* buffer, int size, int32 num, FILE* stream)
{
int32 i; // counter for loop
// fill up every byte
for(i = 0; i < (num * size); i += 1)
buffer[i] = fatgetc(stream);
return i;
}
/*
signed int fatwrite(void* buffer, int size, int32 count, FILE* stream )
Summary: Fills up a stream with data from an array
Param buffer: A pointer to the beginning of an array of any type.
Param size: How many bytes each element in the array is.
Param num: How many elements to write to the stream.
Param stream: The stream to write to.
Returns: How many values were written to the stream.
*/
signed int fatwrite(void* buffer, int size, int32 count, FILE* stream )
{
int32 i; // counter for loop
// write every byte
for(i = 0; i < (count * (int32)size); i += 1)
if(fatputc(buffer[i], stream) == EOF)
return EOF;
return i;
}
/*
signed int fatflush(FILE* stream)
Summary: Flushes the buffer of a given stream.
Param: The stream to flush the buffer of.
Returns: EOF if there was a problem, 0 if everything went okay
*/
signed int fatflush(FILE* stream)
{
// check to see if we have a buffer
if((stream->Flags & Write) || (stream->Flags & Append))
{
// check to see if we need to flush the buffer
if(stream->Cur_Char % STREAM_BUF_SIZE == 0)
{
// flush the buffer to the card
if(mmcsd_write_data(stream->Cur_Char - STREAM_BUF_SIZE, STREAM_BUF_SIZE, stream->Buf) != GOODEC)
{
stream->Flags |= Write_Error;
return EOF;
}
}
else
{
// flush the buffer to the card
// we need to make sure that the buffer gets flushed into the proper location, hence all this weird % math
if(mmcsd_write_data(stream->Cur_Char - (stream->Cur_Char % STREAM_BUF_SIZE), STREAM_BUF_SIZE, stream->Buf) != GOODEC)
{
stream->Flags |= Write_Error;
return EOF;
}
}
return(mmcsd_flush_buffer());
}
return 0;
}
/*
signed int remove(char* fname)
Summary: Removes a file from disk.
Param: The full path of the file to remove.
Returns: 0 on success, or EOF if there was error.
Note: This function does not work for removing directories, use rm_dir instead.
Note: fname must be in the form of /filename.fil for a file in the root directory
/Directory/filename.fil for a file in a subdirectory of root
/Directory/Subdirectory/filename.fil and so on...
*/
signed int remove(char* fname)
{
if(rm_file(fname) == EOF)
return EOF;
return 0;
}
/*
signed int faterror(FILE* stream)
Summary: Checks for an error in a given stream.
Param: The stream to check for an error in.
Returns: A non-zero value of there is an error in the stream,
0 if there is no error in the stream
*/
signed int faterror(FILE* stream)
{
return stream->Flags & 0xF0;
}
/*
void clearerr(FILE* stream)
Summary: Clears off all error in a given stream.
Param: The stream to clear off the errors in.
Returns: Nothing.
*/
void clearerr(FILE* stream)
{
stream->Flags &= 0x0F;
}
/*
void rewind(FILE* stream)
Summary: Sets the stream to point back to the beginning of a file.
Param: The stream to rewind.
Returns: Nothing.
*/
void rewind(FILE* stream)
{
// set the stream back to the beginning
stream->Cur_Char = stream->Start_Addr;
stream->Bytes_Until_EOF = stream->Size;
}
/*
fatpos_t fattell(FILE* stream)
Summary: Returns the current position of where the stream is pointing to relative to the beginning of the stream.
Param: The stream to return the position of.
Returns: The position of where the stream is pointing to relative to the beginning of the stream, or 0 if there was a problem.
*/
fatpos_t fattell(FILE* stream)
{
fatpos_t retval;
if(fatgetpos(stream, &retval) != 0)
return 0;
return retval;
}
/// Non-Standard C Functions ///
/*
signed int rm_file(char fname[])
Summary: Deletes a file.
Param: The full path of the file to delete.
Returns: GOODEC if everything went okay, EOF if there was a problem.
Note: fname must be in the form of /filename.fil for a file in the root directory
/Directory/filename.fil for a file in a subdirectory of root
/Directory/Subdirectory/filename.fil and so on...
*/
signed int rm_file(char fname[])
{
int
order,
ulinked_entry = 0xE5; // 0xE5 is put into the file's entry to indicate unlinking
int32 i;
char mode[] = "r"; // r is the safest mode to remove files with
FILE stream; // the stream that we'll be working with
// attempt to open the stream
if(fatopen(fname, mode, &stream) == EOF)
return EOF;
// we need to un-link the file's clusters from the FAT if there are clusters allocated
if(stream.Start_Addr > Root_Dir)
{
if(dealloc_clusters(addr_to_cluster(stream.Start_Addr)) == EOF)
return EOF;
}
// get rid of the first entry
i = stream.Entry_Addr;
if(mmcsd_write_data(i, 1, &ulinked_entry) == EOF)
return EOF;
// check to see if there is a long file name
get_prev_entry(&i);
if(mmcsd_read_data(i + 11, 1, &order) == EOF)
return EOF;
// get rid of all of the long file name entries if they're there
while(order == 0x0F)
{
if(mmcsd_write_data(i, 1, &ulinked_entry) == EOF)
return EOF;
if(get_prev_entry(&i) == EOF)
return EOF;
if(mmcsd_read_data(i + 11, 1, &order) == EOF)
return EOF;
}
if(fatclose(&stream) == EOF)
return EOF;
return GOODEC;
}
/*
signed int rm_dir(char dname[])
Summary: Deletes a directory.
Param: The full path of the directory to delete.
Returns: GOODEC if everything went okay, EOF if there was a problem.
Note: dname must be in the form of /Dirname/ for a directory in the root directory
/Dirname/Subdirname/ for a directory in a subdirectory of root and so on...
Note: This function cannot remove all of the files
and subdirectories of the directory. Manually remove all subdirectories
and files before calling this command.
*/
signed int rm_dir(char dname[])
{
char mode[] = "r"; // r is the safest mode to remove files with
FILE stream; // the stream that we'll be working with
// attempt to open the stream
if(fatopen(dname, mode, &stream) == EOF)
return EOF;
// jump over the . and .. entries in the directory
stream.Entry_Addr = stream.Start_Addr + 64;
// check to make sure that there isn't stuff in this directory
if(get_next_file(&stream) != EOF)
return EOF;
// since removing files is a lot like removing directories, we
// can just call rm_file
if(rm_file(dname) == EOF)
return EOF;
return GOODEC;
}
/*
signed int mk_file(char fname[])
Summary: Creates a file.
Param: The full path of the file to create.
Returns: GOODEC if everything went okay, EOF if there was a problem.
Note: This function will not create directories if parent directories don't exist.
Note: fname must be in the form of /filename.fil for a file in the root directory
/Directory/filename.fil for a file in a subdirectory of root
/Directory/Subdirectory/filename.fil and so on...
*/
signed int mk_file(char fname[])
{
char
filename[MAX_FILE_NAME_LENGTH], // the file name we're trying to make
mode[] = "r"; // reading is the safest mode to work in
int
buf, // buffer to hold values
entire_entry[0x20],// entire first entry
filename_pos = 0, // the current parse position of the file name we're trying to create
fname_pos; // the current parse position of the input the the function
int32 i; // pointer to memory
FILE stream; // the stream that we'll be working with
// attempt to open up to the directory
if(fatopen(fname, mode, &stream) == GOODEC)
return EOF; // we shouldn't get an GOODEC back from fatopen()
// check to see if the file is already there.
if(!(stream.Flags & File_Not_Found))
return EOF;
// make a file name
fname_pos = strrchr(fname, '/') - fname + 1;
while((fname[fname_pos] != '\0') && (filename_pos < MAX_FILE_NAME_LENGTH))
{
filename[filename_pos] = fname[fname_pos];
fname_pos += 1;
filename_pos += 1;
}
filename[filename_pos] = '\0';
// write the name
if(set_file_name(stream.Start_Addr, &i, filename) == EOF)
return EOF;
// throw in some values in the file's first entry
for(buf = 0; buf < 0x20; buf += 1)
entire_entry[buf] = 0;
// this is a file
entire_entry[0x0B] = 0x20;
// read what set_file_name gave us for the short name
if(mmcsd_read_data(i, 11, entire_entry) != GOODEC)
return EOF;
// write the entry
if(mmcsd_write_data(i, 0x20, entire_entry) != GOODEC)
return EOF;
return GOODEC;
}
/*
signed int mk_dir(char dname[])
Summary: Creates a directory.
Param: The full path of the directory to create.
Returns: GOODEC if everything went okay, EOF if there was a problem.
Note: This function will not create directories if parent directories don't exist.
Note: dname must be in the form of /Dirname/ for a directory in the root directory
/Dirname/Subdirname/ for a directory in a subdirectory of root and so on...
*/
signed int mk_dir(char dname[])
{
char
dirname[MAX_FILE_NAME_LENGTH], // the directory name we're trying to make
entire_entry[0x20], // used to hold the link entries (. and ..) to the directory and its parent
mode[] = "r"; // reading is the safest mode to work in
int
dirname_pos = 0, // the current parse position of the directory name we're trying to create
dname_pos, // the current parse position of the input the the function
j; // counter for loops
int32 i; // pointer to memory
FILE stream; // the stream that we'll be working with
// attempt to open up to the directory
if(fatopen(dname, mode, &stream) == GOODEC)
return EOF; // we shouldn't get an GOODEC back from fatopen()
// check to see if the directory is already there.
if(!(stream.Flags & File_Not_Found))
return EOF;
// make the directory name
dname_pos = strrchr(dname, '/') - dname;
dname[dname_pos] = '\0';
dname_pos = strrchr(dname, '/') - dname + 1;
while((dname[dname_pos] != '\0') && (dirname_pos < MAX_FILE_NAME_LENGTH))
{
dirname[dirname_pos] = dname[dname_pos];
dname_pos += 1;
dirname_pos += 1;
}
dirname[dirname_pos] = '\0';
dname[dname_pos] = '/';
// write the file's name
if(set_file_name(stream.Start_Addr, &i, dirname) == EOF)
return EOF;
// find and allocate an open cluster
if(get_next_free_cluster(&Next_Free_Clust) == EOF)
return EOF;
if(clear_cluster(Next_Free_Clust) == EOF)
return EOF;
#ifdef FAT32
if(write_fat(Next_Free_Clust, 0x0FFFFFFF) == EOF)
return EOF;
#else // FAT16
if(write_fat(Next_Free_Clust, 0xFFFF) == EOF)
return EOF;
#endif // #ifdef FAT32
// throw in some values in the file's first entry
for(j = 0; j < 0x20; j += 1)
entire_entry[j] = 0;
// this is a directory
entire_entry[0x0B] = 0x10;
entire_entry[0x1A] = make8(Next_Free_Clust, 0);
entire_entry[0x1B] = make8(Next_Free_Clust, 1);
#ifdef FAT32
entire_entry[0x14] = make8(Next_Free_Clust, 2);
entire_entry[0x15] = make8(Next_Free_Clust, 3);
#endif // #ifdef FAT32
if(mmcsd_read_data(i, 11, entire_entry) != GOODEC)
return EOF;
// write the file's first entry
if(mmcsd_write_data(i, 0x20, entire_entry) != GOODEC)
return EOF;
// make the two links that point to the directory and the directory's parent
i = cluster_to_addr(Next_Free_Clust);
// put in the first link that points to the directory itself
for(j = 0; j < 0x20; j += 1)
{
if(j < 0x01)
entire_entry[j] = '.';
else if(j < 0x0B)
entire_entry[j] = 0x20;
else if(j == 0x0B)
entire_entry[j] = 0x10;
else
entire_entry[j] = 0x00;
}
entire_entry[0x1A] = make8(Next_Free_Clust, 0);
entire_entry[0x1B] = make8(Next_Free_Clust, 1);
#ifdef FAT32
entire_entry[0x14] = make8(Next_Free_Clust, 2);
entire_entry[0x15] = make8(Next_Free_Clust, 3);
#endif // #ifdef FAT32
if(mmcsd_write_data(i, 0x20, entire_entry) != GOODEC)
return EOF;
for(j = 0; j < 0x0C; j += 1)
{
if(j < 0x02)
entire_entry[j] = '.';
else if(j < 0x0B)
entire_entry[j] = 0x20;
else
entire_entry[j] = 0x10;
}
if(stream.Parent_Start_Addr == Root_Dir)
{
entire_entry[0x14] = 0x00;
entire_entry[0x15] = 0x00;
entire_entry[0x1A] = 0x00;
entire_entry[0x1B] = 0x00;
}
else
{
entire_entry[0x1A] = make8(addr_to_cluster(stream.Parent_Start_Addr), 0);
entire_entry[0x1B] = make8(addr_to_cluster(stream.Parent_Start_Addr), 1);
#ifdef FAT32
entire_entry[0x14] = make8(addr_to_cluster(stream.Parent_Start_Addr), 2);
entire_entry[0x15] = make8(addr_to_cluster(stream.Parent_Start_Addr), 3);
#endif // #ifdef FAT32
}
if(mmcsd_write_data(i + 0x20, 0x20, entire_entry) != GOODEC)
return EOF;
return GOODEC;
}
/// Functions' Utility Functions ///
/// NOTE: A library user should not need to use any of the functions in this section ///
/*
signed int set_file(char fname[], int attrib, FILE* stream)
Summary: This will set the stream to point to the specified file.
Param fname: The file name to search for.
Param attrib: The file attributes to search for. 0x10 is a directory, 0x20 is a file.
Param stream: The stream to set.
Returns: EOF if there was a problem, GOODEC if everything went okay.
Note: The stream has to be pointing to the parent directory's start address when coming in to this function.
*/
signed int set_file(char fname[], int attrib, FILE* stream)
{
int
cur_attrib, // the attribute of the most recently read entry
cur_state, // the state of the most recently read entry
ec = 0; // error checking byte
int32 i; // pointer to memory
#ifndef FAST_FAT
char name_buffer[MAX_FILE_NAME_LENGTH]; // buffer to hold in the most recently read in name
#endif // #ifndef FAST_FAT
// set the memory pointer to the parent start address
i = stream->Start_Addr;
// search for the name of our target file inside of the parent directory
do
{
// read the state and the attribute of the current entry
ec += mmcsd_read_data(i, 1, &cur_state);
ec += mmcsd_read_data(i + 0x0B, 1, &cur_attrib);
if(ec != GOODEC)
{
stream->Flags |= Read_Error;
return EOF;
}
// check to make sure that this entry exists and the entry is the type we're looking for
if((cur_state != 0xE5) && (cur_attrib == attrib))
{
#ifndef FAST_FAT
// get the long file name of the current entry
if(get_file_name(i, name_buffer) == EOF)
return EOF;
// if the target entry and the long file name are equal, strcmp will return a zero
if(strcmp(fname, name_buffer) == 0)
#endif // #ifndef FAST_FAT
{
// we have found our target entry, set the current entry and break out of this function
// set stream's parent address
stream->Parent_Start_Addr = stream->Start_Addr;
ec += mmcsd_read_data(i + 0x1C, 4, &(stream->Size));
// stream->Start_Addr is going to temporarily have a cluster number
ec += mmcsd_read_data(i + 0x14, 2, (int16*)&stream->Start_Addr + 1);
ec += mmcsd_read_data(i + 0x1A, 2, &stream->Start_Addr);
if(ec != GOODEC)
{
stream->Flags |= Read_Error;
return EOF;
}
// convert stream->Start_Addr to an address
stream->Start_Addr = cluster_to_addr(stream->Start_Addr);
stream->Entry_Addr = i;
stream->Bytes_Until_EOF = stream->Size;
// set up some permission-specific parameters if we're at a file
if(attrib == 0x20)
{
stream->File_Type = Data_File;
if(stream->Flags & Write)
{
// delete all previous data in the file
stream->Bytes_Until_EOF = stream->Size = 0;
// if there is already space allocated, get rid of it
if(stream->Start_Addr >= Data_Start)
if(dealloc_clusters(addr_to_cluster(stream->Start_Addr)) == EOF)
return EOF;
stream->Cur_Char = 0;
}
if((stream->Flags & Append) && (stream->Size != 0))
{
// set the position to the end of the file and fill the buffer with the contents of the end of the file
ec = fatsetpos(stream, &(stream->Size));
if(stream->Cur_Char % STREAM_BUF_SIZE == 0)
ec += mmcsd_read_data(stream->Cur_Char - STREAM_BUF_SIZE, STREAM_BUF_SIZE, stream->Buf);
else
ec += mmcsd_read_data(stream->Cur_Char - (stream->Cur_Char % STREAM_BUF_SIZE), STREAM_BUF_SIZE, stream->Buf);
}
#ifndef FAST_FAT
if(stream->Flags & Read)
{
stream->Cur_Char = stream->Start_Addr;
// fill up the read buffer for reading
ec = mmcsd_read_data(stream->Cur_Char, STREAM_BUF_SIZE, stream->Buf);
}
#endif // #ifndef FAST_FAT
if(ec != GOODEC)
{
stream->Flags |= Read_Error;
return EOF;
}
}
else
stream->File_Type = Directory;
return GOODEC;
}
}
// check to make sure that the next iteration will give us a contiguous cluster
if(get_next_entry(&i) == EOF)
return EOF;
} while(cur_state != 0x00);
// if we reach this point, we know that the file won't be found
stream->Flags |= File_Not_Found;
return EOF;
}
/*
signed int get_file_name(int32 file_entry_addr, char name[])
Summary: This will get a name of a file.
Param file_entry_addr: The position in memory that the file's entry is.
Param name[]: The place to put the name of the file into.
Returns: EOF if there was a problem, GOODEC if everything went okay.
*/
signed int get_file_name(int32 file_entry_addr, char name[])
{
int
j, // counter for loops
k = 0, // current character in array
order, // byte to hold the current long file name order
type; // the type of entry that was just read in
int32 i; // pointer for memory
// the long file name isn't fragmented across clusters
i = file_entry_addr;
// check to make sure that this file has a long file name
if(mmcsd_read_data(i - 0x15, 1, &type) != GOODEC)
return EOF;
if(type != 0x0F)
{
// this file doesn't have a long file name
if(get_short_file_name(i, name, type) == EOF)
return EOF;
return GOODEC;
}
do
{
// head to the previous entry
if(get_prev_entry(&i) == EOF)
return EOF;
for(j = 1; j < 0x20; j += 2, k += 1)
{
if(j == 11)
j = 14;
else if(j == 26)
j = 28;
if(mmcsd_read_data(j + i, 1, &(name[k])) != GOODEC)
return EOF;
}
// now that that's done with, get the entry's order
if(mmcsd_read_data(i, 1, &order) != GOODEC)
return EOF;
} while(!(order & 0x40)); // the last entry will be 0b01xxxxxx
// end the name[] buffer with a \0
name[k] = '\0';
return GOODEC;
}
/*
signed int set_file_name(int32 parent_dir_addr, int32 entry_addr, char name[])
Summary: Creates both a short and long file name at the first free entry in a directory.
Param parent_dir_addr: The address of the parent directory to create the short file name in.
Param entry_addr: The address the function put the short file name entry.
Param name: The full file name.
Returns: EOF if there was a problem, GOODEC if everything went okay.
*/
signed int set_file_name(int32 parent_dir_addr, int32* entry_addr, char name[])
{
char sname[12]; // place to hold the short file name
signed int name_pos = 0; // the current parse position of name[]
int
chksum, // the long file name checksum
entire_entry[0x20], // the entire entry to put write onto the media
entry_pos, // the current position inside of entire_entry
long_entry = 1; // the current long entry number we're on
int32 i; // pointer to memory
// check for invalid characters
if(check_invalid_char(name) == EOF)
return EOF;
// make a short file name of this
if(make_short_file_name(parent_dir_addr, name, sname) == EOF)
return EOF;
// get a checksum for the long file name entries
chksum = long_name_chksum(sname);
// start writing the long file name
// zero out entry[]
for(entry_pos = 0; entry_pos < 0x20; entry_pos += 1)
entire_entry[entry_pos] = 0;
i = parent_dir_addr;
if(get_next_free_entry(&i) == EOF)
return EOF;
// 0x0F signifies an file entry
entire_entry[11] = 0x0F;
// since we're working in reverse, write the final long name entry
name_pos = strlen(name);
name_pos %= 13;
if(name_pos != 0)
{
// add 1 to account for the \0 terminator
name_pos += 1;
fill_entry(entire_entry, 0xFF, name_pos);
}
// start writing the long file name entries
name_pos = strlen(name);
// figure out how many entries this name will take up
long_entry = (name_pos / 13) + 1;
if(name_pos % 13 == 0)
long_entry -= 1;
// set the bit to signify this is the final entry
long_entry |= 0x40;
while(name_pos >= 0)
{
entry_pos = name_pos % 13;
if(entry_pos < 5)
entire_entry[(entry_pos << 1) + 1] = name[name_pos];
else if(entry_pos < 11)
entire_entry[(entry_pos << 1) + 4] = name[name_pos];
else
entire_entry[(entry_pos << 1) + 6] = name[name_pos];
if((entry_pos == 0)
&& (name_pos != strlen (name)))
{
entire_entry[0] = long_entry;
// clear off the bits at positions 6 and 7 if the most recent entry was the final one.
if(name_pos != 0)
long_entry &= 0x3F;
long_entry -= 1;
entire_entry[13] = chksum;
if(mmcsd_write_data(i, 0x20, entire_entry) != GOODEC)
return EOF;
if(get_next_free_entry(&i) == EOF)
return EOF;
fill_entry(entire_entry, 0x00, 0);
}
name_pos -= 1;
}
// write the short file name to the entry
if(mmcsd_write_data(i, 11, sname) != GOODEC)
return EOF;
// set the new entry addr
*entry_addr = i;
return GOODEC;
}
/*
signed int get_short_file_name(int32 file_entry_addr, char sname[], int type)
Summary: Reads a file's short file name, puts all the characters into lower case, and puts it into a buffer.
Param file_entry_addr: Where the file's entry address is located.
Param sname: The buffer to put the short file name.
Returns: EOF if there was a problem, GOODEC if everything went okay.
signed int get_short_file_name(int32 file_entry_addr, char sname[], int type)
{
int
buf,
i,
j = 0;
// one short file name has, at the most, 11 characters
for(i = 0; i < 11; i += 1)
{
// read in a character
if(mmcsd_read_data(i + file_entry_addr, 1, &buf) != GOODEC)
return EOF;
// convert the character
if(buf != ' ')
{
sname[j] = tolower(buf);
j += 1;
}
}
// tack on a null terminator
sname[j] = '\0';
//printf("\r\n%s, %u\r\n",sname, strlen(sname));
if(type != 0x10 && strlen(sname) > 3)
{
j = strlen(sname);
for(i=j; i > j-3; --i)
sname[i] = sname[i-1];
sname[i] = '.';
}
sname[j+1] = '\0';
return GOODEC;
}
*/
signed int get_short_file_name(int32 file_entry_addr, char sname[], int type)
{
int
buf,
i,
j = 0;
// one short file name has, at the most, 11 characters
for(i = 0; i < 11; ++i)
{
// read in a character
if(mmcsd_read_data(i + file_entry_addr, 1, &buf) != GOODEC)
return EOF;
// convert the character
if(buf != ' ')
{
if (i == 8 && type != 0x10) sname[j++] = '.';
sname[j++] = tolower(buf);
}
}
if (sname[j - 1] == '.') --j;
sname[j] = '\0';
return GOODEC;
}
/*
signed int make_short_file_name(int32 parent_dir_addr, char fname[], char sname[])
Summary: Creates a unique short file name in a directory.
Param parent_dir_addr: The address of the parent directory to create the short file name in.
Param fname: The full file name.
Param sname: Character array that will hold the short file name upon function completion.
Returns: EOF if there was a problem, GOODEC if everything went okay.
*/
signed int make_short_file_name(int32 parent_dir_addr, char fname[], char sname[])
{
char
val[12] = " ",
cur_fname[12] = " ",
cur_fnum[7] = " ";
int
buf,
ext_pos,
fname_parse_pos = 0,
val_parse_pos = 0;
int32
fnum = 0,
i;
// figure out where the extension position is
ext_pos = strchr(fname, '.');
// check to see if this file has an extension
if(ext_pos == 0)
{
while((val_parse_pos < 8) && (fname[fname_parse_pos] != '\0'))
{
val[val_parse_pos] = toupper(fname[fname_parse_pos]);
val_parse_pos += 1;
fname_parse_pos += 1;
// we can't have a '.' or ' ' in the short name
while((fname[fname_parse_pos] == '.') || (fname[fname_parse_pos] == ' '))
fname_parse_pos += 1;
}
}
else
{
ext_pos -= fname - 1;
while((val_parse_pos < 11) && (fname[fname_parse_pos] != '\0'))
{
val[val_parse_pos] = toupper(fname[fname_parse_pos]);
val_parse_pos += 1;
fname_parse_pos += 1;
// we can't have a '.' or ' ' in the short name
while((fname[fname_parse_pos] == '.') || (fname[fname_parse_pos] == ' '))
fname_parse_pos += 1;
// check to see if it's time to skip val_parse_pos ahead to the file extension
if(fname_parse_pos == ext_pos)
val_parse_pos = 8;
// check to see if it's time to skip name_parse_pos ahead to the file extension
else if(val_parse_pos == 8)
fname_parse_pos = ext_pos;
}
}
// now that we've got the short file name, we need to make it unique
i = parent_dir_addr;
if(mmcsd_read_data(i + 0x0B, 1, &buf) != GOODEC)
return EOF;
// keep reading until we hit empty space
while(buf != 0x00)
{
// check to see if this is a short file name entry
if((buf == 0x20) || (buf == 0x10))
{
// read in the short file name that we're currently pointing at
if(mmcsd_read_data(i, 11, cur_fname) != GOODEC)
return EOF;
cur_fname[11] = '\0';
// strcmp will return a 0 if the file name we're currently pointing at and the file name that we created above are the same
if(strcmp(cur_fname, val) == 0)
{
// we now need to create a unique file name
// increment the unique file number by one
fnum += 1;
// convert the unique file number to a string
sprintf(cur_fnum, "%u", fnum);
// put the unique file number, along with a '~' into our short file name
fname_parse_pos = 0;
// find out the last posiiton of a space
val_parse_pos = strchr(val, ' ');
if(val_parse_pos == 0)
// if there isn't a space, then we're going to have to put the ~x at the end of the short name
val_parse_pos = 7 - strlen(cur_fnum);
else
// if there is a space, then put the ~x there
val_parse_pos -= val + 2;
// make some room for extra digits
buf = 10;
while(fnum >= buf)
{
val_parse_pos -= 1;
buf *= 10;
}
// write in the ~
val[val_parse_pos] = '~';
// write in the number
val_parse_pos += 1;
while(cur_fnum[fname_parse_pos] != '\0')
{
val[val_parse_pos] = cur_fnum[fname_parse_pos];
val_parse_pos += 1;
fname_parse_pos += 1;
}
// start the search over again to see if that unique file name/number combination is still taken up
i = parent_dir_addr;
}
}
// head to the next entry
if(get_next_entry(&i) == EOF)
{
// we're going to have to allocate another cluster
if(alloc_clusters(addr_to_cluster(i), &i) == EOF)
return EOF;
}
if(mmcsd_read_data(i + 0x0B, 1, &buf) != GOODEC)
return EOF;
}
// copy the short name into the input buffer
for(i = 0; i < 12; i += 1)
sname[i] = val[i];
return GOODEC;
}
/*
int long_name_chksum (int* FcbName)
Summary: Returns an unsigned byte checksum computed on an unsigned byte
array. The array must be 11 bytes long and is assumed to contain
a name stored in the format of a MS-DOS directory entry.
Param: Pointer to an unsigned byte array assumed to be 11 bytes long.
Returns: Sum An 8-bit unsigned checksum of the array pointed to by pFcbName.
*/
int long_name_chksum (int* pFcbName)
{
int
FcbNameLen,
Sum = 0;
for(FcbNameLen = 11; FcbNameLen != 0; FcbNameLen -= 1)
// The operation is an unsigned char rotate right
Sum = ((Sum & 1) ? 0x80 : 0) + (Sum >> 1) + *pFcbName++;
return Sum;
}
/*
signed int check_invalid_char(char fname[])
Summary: Checks the filename for any invalid characters.
Param: The name of the file to check.
Returns: EOF if an invalid character was found, GOODEC otherwise.
*/
signed int check_invalid_char(char fname[])
{
int fname_pos;
for(fname_pos = 0; (fname[fname_pos] != '\0') && (fname_pos < MAX_FILE_NAME_LENGTH); fname_pos += 1)
if(isamoung(fname[fname_pos], "\\/:*?\"<>|"))
return EOF;
return GOODEC;
}
|
|
|
|
Neo2a
Joined: 02 May 2009
Posts: 7
Location: Hungary
|
| Main code |
| Posted: Wed Aug 22, 2012 2:49 am |
|
|
The main code is this
based on the example in ccsc
| Code: |
#include <fat16 proba.h>
//#use rs232(UART1,baud=9600,parity=N,bits=8,stream=RS232)
#byte PLLDIV = 0x746 // bits 8--0 = Pll div = 0x1e
#byte CLKDIV = 0x744 // bits 7--6 = Pll post = 0 // bits 4--0 = Pll Pre = 0
#byte SPI2CON1 = 0x262
#include "\mmcsd.c"
#include "\fat.c"
//////////////////////////////////////
#include <stdlib.h> // for atoi32
//////////////////////
/// ///
/// Useful Defines ///
/// ///
//////////////////////
#define COMMAND_SIZE 10
#define NUM_COMMANDS 11
////////////////////////
/// ///
/// Global Variables ///
/// ///
////////////////////////
char g_CWD[200] = "/"; //current working directory
char commands[NUM_COMMANDS][COMMAND_SIZE]=
{
"del", //option1=filename. delete file.
"make", //option1=filename. create an empty file, give error if file already exists
"append", //option1=filename, option2=string. append string to end of file
"cd", //option1=new cwd. change working directory. / is root.
"dir", //show files in directory
"cat", //option1=filename. display full contents in ascii
"tail", //option1=filename. display the last 20 lines of file.
"mkdir", //option1=dir. create directory. see 'cd' for rules on dir
"rmdir", //option1=dir. remove directory. see 'cd' for rules on dir.
"format", // option1=media size in bytes. formats the media.
"help" // help!
};
////////////////////////////////
/// ///
/// Function Implementations ///
/// ///
////////////////////////////////
/*
Summary: Finds a command from the global list of commands.
Param: A pointer to the command string.
Returns: The command number if the command is found in the command list.
0xFF if the command isn't found
*/
int FindCommand(char *cmd)
{
char buf[COMMAND_SIZE];
int i;
for (i=0; i<NUM_COMMANDS; i++)
{
strcpy(buf, &commands[i][0]);
if (stricmp(buf, cmd)==0)
return(i);
}
return(0xFF);
}
/*
Summary: Displays the current working directory.
Param: None.
Returns: None.
*/
void DisplayPrompt(void)
{
printf("\r\n\n%s> ", g_CWD);
}
/*
Summary: Deletes a file.
Param: The full path of the file to delete.
Returns: None.
*/
void DeleteFile(char *fileName)
{
printf("\r\nDeleting '%s': ", fileName);
if(rm_file(fileName) != GOODEC)
{
printf("Error deleting file");
return;
}
printf("OK");
}
/*
Summary: Creates a file.
Param: The full path of the file to create.
Returns: None.
Example Usage: \> make "Log.txt"
*/
void MakeFile(char *fileName)
{
printf("\r\nMaking file '%s': ", fileName);
if(mk_file(fileName) != GOODEC)
{
printf("Error creating file");
return;
}
printf("OK");
}
/*
Summary: Append a string to a file.
Param: The full path of the file to append to.
Param: A pointer to a string to append to the file.
Returns: None.
Example Usage: \> append "Log.txt" "This will be appended to the end of Log.txt"
Note: A "\r\n" will be appended after the appendString.
*/
void AppendFile(char *fileName, char *appendString)
{
FILE stream;
printf("\r\nAppending '%s' to '%s': ", appendString, fileName);
if(fatopen(fileName, "a", &stream) != GOODEC)
{
printf("Error opening file");
return;
}
fatputs(appendString, &stream);
fatputs("\r\n", &stream);
if(fatclose(&stream) != GOODEC)
{
printf("Error closing file");
return;
}
printf("OK");
}
/*
Summary: Change the working directory.
Param: The new working directory to switch to.
Returns: None.
Example Usage: \> cd ftp/ -> /ftp/
\ftp\> cd files/ -> /ftp/files/
\ftp\files> cd.. -> /ftp/
\ftp\> cd .. -> /
\> cd /ftp/files/ -> /ftp/files/
Note: Changing the directory to .. will go up a directory.
*/
void ChangeDirectory(char *newCWD)
{
FILE stream;
//append a / to the end of the filename if it doesn't exist
//making an assumption here that newCWD can hold 1 more character
if (newCWD[strlen(newCWD)-1] != '/')
strcat(newCWD, "/");
if((strstr(newCWD, "../") != 0) && (strcmp(g_CWD, "/") != 0))
{
g_CWD[strlen(g_CWD) - 1] = '\0';
g_CWD[strrchr(g_CWD, '/') - g_CWD + 1] = '\0';
}
else
{
if(fatopen(newCWD, "r", &stream) != GOODEC)
{
printf("\r\nError changing directory");
return;
}
strcpy(g_CWD, newCWD);
}
}
/*
Summary: Display the contents of the working directory.
Param: The full path of the directory contents to display.
Returns: None.
Example Usage: /> dir
*/
void DisplayDirectory(char *dir)
{
disp_folder_contents(dir);
}
/*
Summary: Create a directory.
Param: The full path of the directory to create.
Returns: None.
Example Usage: /> mkdir "Backlog"
*/
void MakeDirectory(char *dir)
{
//append a / to the end of the filename if it doesn't exist
//making an assumption here that newCWD can hold 1 more character
if (dir[strlen(dir)-1] != '/')
strcat(dir, "/");
printf("\r\nMaking directory '%s': ", dir);
if(mk_dir(dir) != GOODEC)
{
printf("Error creating directory");
return;
}
printf("OK");
}
/*
Summary: Remove a directory.
Param: The full path of the directory to remove.
Returns: None.
Example Usage: /> rmdir "Backlog"
Note: The directory needs to be empty in order for this command to work.
*/
void RemoveDirectory(char *dir)
{
printf("\r\nRemoving directory '%s': ", dir);
//append a / to the end of the filename if it doesn't exist
//making an assumption here that newCWD can hold 1 more character
if (dir[strlen(dir)-1] != '/')
strcat(dir, "/");
if(rm_dir(dir) != GOODEC)
{
printf("Error removing directory");
return;
}
printf("OK");
}
#define CAT_FROM_START FALSE
#define CAT_FROM_END TRUE
/*
Summary: Prints either all of or the last 80 characters in a file.
Param: The full path of the file to print off.
Param: If true, this function will print off the last 80 characters in the file.
If false, this funciton will print off the entire file.
Returns: None.
Example Usage: /> cat "Logs.txt" (this will display the entire file)
Example Usage: /> tail "Logs.txt" (this will display the last 80 characters in the file)
*/
void PrintFile(char *fileName, int1 startFromEnd)
{
FILE stream;
if(fatopen(fileName, "r", &stream) != GOODEC)
{
printf("\r\nError opening file");
return;
}
printf("\r\n");
if(startFromEnd)
fatseek(&stream, 80, SEEK_END);
fatprintf(&stream);
fatclose(&stream);
}
/*
Summary: Formats the media to a specified size.
Param: The size of the media, in kB, in string form.
Returns: None.
Example Usage: /> format 524288 (format a 512MB card)
*/
void FormatMedia(char *mediaSize)
{
int32 size;
size = atoi32(mediaSize);
printf("\r\nFormatting media (size=%LU): ", size);
if(format(size) != GOODEC)
{
printf("Error formatting media");
return;
}
printf("OK");
}
/*
Summary: Shows a help prompt.
Param: None.
Returns: None.
Example Usage: /> help
*/
void ShowHelp()
{
printf("\r\nFAT Shell Help");
printf("\r\n del filename --- Deletes the file");
printf("\r\n make filename --- Creates an empty file");
printf("\r\n append filename string --- Appends string to the end of the file");
printf("\r\n cd dir --- Change the working directory");
printf("\r\n dir --- Shows the contents of the directory");
printf("\r\n cat filename --- Displays content of file");
printf("\r\n tail filename --- Displays the last 80 characters of file");
printf("\r\n mkdir dir --- Create a directory");
printf("\r\n rmdir dir --- Deletes the directory");
printf("\r\n format size --- Format card. (Example: 'format 5524288' formats a 512MB card)");
printf("\r\n help\tYou are here");
printf("\r\n\n Put a parameter in quotes if it has spaces");
}
char * GetCMD(char *in)
{
char tokens[]=" \r\n";
return(strtok(in,tokens));
}
char * GetOption(char *in)
{
char tokensSpace[]=" \r\n";
char tokensQuote[]="\"\r\n";
//trim leading spaces
while (*in==' ')
in++;
//if first char is a quote, then end token on a quote. ELSE end token on a space
if (*in == '\"')
return(strtok(in,tokensQuote));
else
return(strtok(in,tokensSpace));
}
/////////////////////////////////////
void main(void)
{
//PLL setting for 32M and SPI CLK settings for hardware SPI2
PLLDIV=30;
CLKDIV=128;
SPI2CON1=60;
set_tris_g (80);
output_high(PIN_C4); // Disable Serial Flash module
output_high(PIN_G12); // Disable MP3 module
output_low(PIN_D7); // LCD backlight off
setup_spi( FALSE ); //Kill hardware SPI
setup_spi2( FALSE ); //Kill hardware SPI2
printf("Program Started!");
delay_ms(2000);
char buffer[255];
char opt_buffer[255];
char *cmd, *option1, *option2;
int i; // pointer to the buffer
// initialize the FAT
// keep in mind that this will automagically initialize the media
i = fat_init();
if (i)
printf("\r\n\nERROR INITIALIZING FAT\r\n\n");
// main loop
while(TRUE)
{
i = 0;
DisplayPrompt();
do
{
buffer[i] = getch();
// check for a backspace
if(buffer[i] != 8)
{
printf("%c", buffer[i]);
i++;
}
else if(i > 0)
{
// delete the last character
i--;
putc(8);
putc(' ');
putc(8);
}
buffer[i] = '\0';
} while(buffer[i - 1] != '\r');
// parse the command and options
cmd = GetCMD(buffer);
option1 = GetOption(cmd + strlen(cmd) + 1);
option2 = GetOption(option1 + strlen(option1) + 1);
//if option1 starts with a '/', that means the file in the option includes
//the full path to the file. if the file doesn't start with a '/', the
//current working directory must be added.
if (option1 && (option1[0]=='/'))
{
//option1 is a full path
strcpy(opt_buffer, option1);
}
else if (option1)
{
// tack on the current working directory to option1
strcpy(opt_buffer, g_CWD);
strcat(opt_buffer, option1);
}
if (cmd)
{
switch(FindCommand(cmd))
{
case 0: //del
DeleteFile(opt_buffer);
break;
case 1: //make
MakeFile(opt_buffer);
break;
case 2: //append
AppendFile(opt_buffer, option2);
break;
case 3: //change directory
ChangeDirectory(opt_buffer);
break;
case 4: //show directory contents
DisplayDirectory(g_CWD);
break;
case 5: //cat, display file
PrintFile(opt_buffer, CAT_FROM_START);
break;
case 6: //tail, display last 80 charachters
PrintFile(opt_buffer, CAT_FROM_END);
break;
case 7: //mkdir, make a directory
MakeDirectory(opt_buffer);
break;
case 8: //rmdir, make a directory
RemoveDirectory(opt_buffer);
break;
case 9: //format, format the card
FormatMedia(option1);
break;
case 10: //help, display help
ShowHelp();
break;
default:
printf("\r\nUnkown Command '%s'", cmd);
break;
}
}
}
}
|
The header file in the fat16 proba.h
| Code: |
#include <33FJ256GP710A.h>
#device ICD=TRUE
#device PASS_STRINGS = IN_RAM
#device ADC=12
#FUSES WDT //Watch Dog Timer
#FUSES NOWRTB //Boot block not write protected
#FUSES NOBSS //No boot segment
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOWRT //Program memory not write protected
#FUSES NOOSCIO //OSC2 is general purpose output
#FUSES PR_PLL //Pimary oscillator
#FUSES XT
#FUSES WPRES128 //Watch Dog Timer PreScalar 1:128
#FUSES WPOSTS16 //Watch Dog Timer PostScalar 1:32768
#FUSES PUT128 //Power On Reset Timer value 128ms
#FUSES NOIESO //Internal External Switch Over mode disabled
#FUSES NORSS //No secure segment RAM
#FUSES NOSSS //No secure segment
#FUSES NOWRTSS //Secure segment not write protected
#FUSES NORBS //No Boot RAM defined
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOJTAG //JTAG disabled
#use delay(clock=32000000)
#use fixed_IO(E_outputs = PIN_E0,PIN_E0,PIN_E1,PIN_E1,PIN_E2,PIN_E2)
#use rs232(baud=9600,xmit=PIN_F5,rcv=PIN_F4,parity=N,bits=8,stream=USB,errors) |
I hope somebody will help me.
Thax
Steve |
|
|
|
|
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