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neochrome32
Joined: 09 Jun 2013
Posts: 153
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| gofat.c |
 Posted: Mon Jun 10, 2013 9:01 pm |
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Now TOMI deserves recognition as this is really HIS code, i just modded to work with the CCS C mmcsd engine.
(im sorry this is pretty RAM chunky and i haven't got around to shrinking it)
| Code: |
#include "gofat.h"
char IsSelfDir(char *be){
if (be[0] == '.' && be[1] == '.') return 0xFF;
else return 0;
}
int16 GetCurrentDOSDate(){
int16 retval;
retval = myrec.tm_year - 1980;
retval <<= 9;
retval |= ((int16)myrec.tm_mon << 5);
retval |= (int16)myrec.tm_mday;
return retval;
}
int16 GetCurrentDOSTime(){
int16 retval;
retval = myrec.tm_hour;
retval <<= 11;
retval |= ((int16)myrec.tm_min << 5);
retval |= (int16)myrec.tm_sec >> 1;
return retval;
}
void ReadSector(int32 Sector, char *buffer){
gFAT32Vars.MMCAddress <<= 1;
mmcsd_read_block(Sector * 512, 512, buffer);
}
void WriteSector(int32 Sector, char *buffer){
gFAT32Vars.MMCAddress <<= 1;
mmcsd_write_block(Sector * 512, 512, buffer);
}
int32 InitFAT(){
int32 actsector;
char i;
gFirstEmptyCluster = 0;
gFAT32Vars.gStartSector = 0;
ReadSector(gFAT32Vars.gStartSector,gFiles[MAXFILES-1].IOpuffer);
if (gFiles[MAXFILES-1].IOpuffer[0] != 0xEB) {
gStartSectorL = gFiles[MAXFILES-1].IOpuffer[0x1C6];
gStartSectorH = gFiles[MAXFILES-1].IOpuffer[0x1C7];
gStartSectorHL = gFiles[MAXFILES-1].IOpuffer[0x1C8];
ReadSector(gFAT32Vars.gStartSector,gFiles[MAXFILES-1].IOpuffer);
}
memcpy(&DiskInfo,gFiles[MAXFILES-1].IOpuffer,sizeof(DiskInfo));
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1;
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = 0;
gFAT32Vars.gFirstDataSector = gFAT32Vars.gStartSector + DiskInfo.FATCopies*DiskInfo.hSectorsPerFat+DiskInfo.Reserved1 -2;
printf("FAT32 START: %Lu\n", gFAT32Vars.gFirstDataSector);
for (i=0;i<MAXFILES;i++)
gFiles[i].Free = TRUE;
return gFAT32Vars.gFirstDataSector;
}
int32 GetNextCluster(int32 curcluster)
{
int32 actsector;
int32 clpage;
char clpos;
clpage = curcluster >> 7;
clpos = curcluster & 0x7F;
if (clpage != gFAT32Vars.FATstartidx) { // read in the requested page
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + clpage;
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = clpage;
}
return (FATTable[clpos]);
}
void SetClusterEntry(int32 curcluster,int32 value)
{
int32 actsector;
int32 clpage;
char clpos;
clpage = curcluster >> 7;
clpos = curcluster & 0x7F;
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + clpage;
if (clpage != gFAT32Vars.FATstartidx) {
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = clpage;
}
FATTable[clpos] = value;
WriteSector(actsector,FATTable);
actsector += DiskInfo.hSectorsPerFat;
WriteSector(actsector,FATTable);
}
void ClearClusterEntry(int32 curcluster)
{
int32 actsector;
int32 clpage;
char clpos;
clpage = curcluster >> 7;
clpos = curcluster & 0x7F;
if (clpage != gFAT32Vars.FATstartidx) {
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + gFAT32Vars.FATstartidx;
WriteSector(actsector,FATTable);
actsector += DiskInfo.hSectorsPerFat;
WriteSector(actsector,FATTable);
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + clpage;
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = clpage;
}
FATTable[clpos] = 0;
}
int32 FindFirstFreeCluster()
{
int32 i,st,actsector,retval;
char j;
st = gFirstEmptyCluster;
for (i=st;i<DiskInfo.hSectorsPerFat;i++) {
if (i != gFAT32Vars.FATstartidx) {
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + i;
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = gFirstEmptyCluster = i;
}
for (j=0;j<128;j++)
if (FATTable[j] == 0) {
retval = i;
retval <<= 7;
retval |= j;
return retval;
}
}
return 0x0FFFFFFF;
}
void ConvertFilename(DIR *beDir,char *name)
{
char i,j,c;
j = 0;
name[0] = 0;
for (i=0;i<8;i++) {
c = beDir->sName[i];
if (c == ' ') break;
name[j++] = c;
}
for (i=0;i<3;i++) {
c = beDir->spam[i];
if (c == ' ' || c == 0) break;
if (!i) name[j++] = '.';
name[j++] = c;
}
name[j++] = 0;
}
void GetDOSName(DIR *pDir, char *fname)
{
char i,j,leng,c,toext;
toext = FALSE;
j = 0;
leng = strlen(fname);
for (i=0;i<8;i++)
pDir->sName[i] = ' ';
for (i=0;i<3;i++)
pDir->spam[i] = ' ';
for (i=0;i<leng;i++) {
c = fname[i];
c = toupper(c);
if (c == '.') {
toext = TRUE;
continue;
}
if (toext) pDir->spam[j++] = c;
else pDir->sName[i] = c;
}
}
void ReadRootDirectory(char fil){
int32 actsector;
if (fil > (MAXFILES-1)) return;
actsector = gFAT32Vars.gStartSector + DiskInfo.FATCopies*DiskInfo.hSectorsPerFat+DiskInfo.Reserved1;
ReadSector(actsector,gFiles[fil].IOpuffer);
gFAT32Vars.gDirEntrySector = actsector;
gFiles[fil].dirSector = actsector;
gFiles[fil].dirIdx = 0;
memcpy(&(gFiles[fil].DirEntry),gFiles[fil].IOpuffer,32);
gFiles[fil].CurrentCluster = DiskInfo.hRootStartCluster;
}
char FindDirEntry(char *fname,char f)
{
DIR *pDir;
int16 i;
char filename[16];
int32 nextcluster,actsector;
if (f > (MAXFILES-1)) return FALSE;
gFAT32Vars.gFirstEmptyDirEntry = 0xFFFF;
gFAT32Vars.gFirstDirEntryCluster = 0x0FFFFFFF;
do {
pDir = (DIR*)(gFiles[f].IOpuffer);
for (i=0;i<16;i++) {
if ((pDir->sName[0] == 0xE5 || pDir->sName[0] == 0) && gFAT32Vars.gFirstEmptyDirEntry == 0xFFFF) { // store first free
gFAT32Vars.gFirstEmptyDirEntry = i;
gFAT32Vars.gFirstDirEntryCluster = gFiles[f].CurrentCluster;
}
if (pDir->sName[0] == 0) return FALSE;
ConvertFilename(pDir,filename);
if (!strcmp(filename,fname)) {
memcpy(&(gFiles[f].DirEntry),pDir,32);
gFiles[f].dirIdx = i;
gFAT32Vars.gDirEntryIdx = i;
return TRUE;
}
pDir++;
}
nextcluster = GetNextCluster(gFiles[f].CurrentCluster);
if (nextcluster != 0x0FFFFFFF && nextcluster != 0) {
actsector = nextcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFAT32Vars.gDirEntrySector = actsector;
gFiles[f].dirSector = actsector;
gFiles[f].CurrentCluster = nextcluster;
}
} while (nextcluster != 0x0FFFFFFF && nextcluster != 0);
return FALSE;
}
// file I/O routines
char* TryFile(char *fname, char *f)
{
char i,leng;
char *filename;
*f = 0xFF;
for (i=0;i<MAXFILES;i++) {
if (gFiles[i].Free) {
*f = i;
break;
}
}
if (*f == 0xFF) return 0;
ReadRootDirectory(*f);
filename = fname;
leng = strlen(fname);
for (i=0;i<leng;i++) {
if (fname[i] == '/') {
fname[i] = 0;
if (!cwd(filename,*f)) {
gFiles[*f].Free = TRUE;
return 0;
}
filename = fname+i+1;
}
}
return filename;
}
char fcreate(char f,char *fname)
{
DIR *pDir;
int32 actsector,actcl;
int16 i;
if (f > (MAXFILES-1)) return FALSE;
if (gFAT32Vars.gFirstDirEntryCluster == 0x0FFFFFFF) {
// extend the directory file !!!
gFAT32Vars.gFirstDirEntryCluster = FindFirstFreeCluster();
gFAT32Vars.gFirstEmptyDirEntry = 0;
SetClusterEntry(gFiles[f].CurrentCluster,gFAT32Vars.gFirstDirEntryCluster);
SetClusterEntry(gFAT32Vars.gFirstDirEntryCluster,0x0FFFFFFF);
actsector = gFAT32Vars.gFirstDirEntryCluster + gFAT32Vars.gFirstDataSector;
for (i=0;i<512;i++)
gFiles[f].IOpuffer[i] = 0;
WriteSector(actsector,gFiles[f].IOpuffer);
}
actsector = gFAT32Vars.gFirstDirEntryCluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*gFAT32Vars.gFirstEmptyDirEntry]));
gFiles[f].dirSector = actsector;
gFiles[f].dirIdx = gFAT32Vars.gFirstEmptyDirEntry;
GetDOSName(pDir,fname);
pDir->bAttr = 0;
actcl = FindFirstFreeCluster();
pDir->hCluster = actcl & 0xFFFF;
pDir->hClusterH = actcl >> 16;
SetClusterEntry(actcl,0x0FFFFFFF);
pDir->wSize = 0;
gFiles[f].position = 0;
pDir->hDate = GetCurrentDOSDate();
pDir->hTime = GetCurrentDOSTime();
WriteSector(actsector,gFiles[f].IOpuffer);
memcpy(&(gFiles[f].DirEntry),pDir,32);
return TRUE;
}
int32 ComposeCluster(char f){
int32 retval;
retval = gFiles[f].DirEntry.hClusterH;
retval <<= 16;
retval |= gFiles[f].DirEntry.hCluster;
return retval;
}
char cwd(char *fname, char f){
int32 actsector;
if (f > (MAXFILES-1)) return FALSE; // just in case of overaddressing
if (IsSelfDir(fname)) return TRUE; // already in Root dir
if (!FindDirEntry(fname,f)) return FALSE; // not found
actsector = ComposeCluster(f);
actsector += gFAT32Vars.gFirstDataSector; // read current dir
ReadSector(actsector,gFiles[f].IOpuffer);
gFAT32Vars.gDirEntrySector = actsector;
gFiles[f].dirSector = actsector;
gFiles[f].CurrentCluster = ComposeCluster(f);
return TRUE;
}
char fopen(char *fname, char mode){
char found;
char f;
int32 actsector,actcluster,nextcluster;
char *filename;
//if (input(CardInserted)) return 0xFF;
//output_high(YELLOWLED);
filename = TryFile(fname,&f);
if (filename == 0) return 0xFF;
found = FALSE;
found = FindDirEntry(filename,f);
if (!found) {
if (mode == 'r') {
gFiles[f].Free = TRUE;
return 0xFF;
} else {
if (!fcreate(f,filename)) return 0xFF;
found = TRUE;
}
}
if (found) {
gFiles[f].Free = FALSE;
gFiles[f].mode = mode;
if (mode == 'a') {
gFiles[f].position = gFiles[f].DirEntry.wSize;
actcluster = ComposeCluster(f);
while (actcluster != 0x0FFFFFFF && nextcluster != 0) {
nextcluster = GetNextCluster(actcluster);
if (nextcluster == 0x0FFFFFFF || nextcluster == 0) break;
actcluster = nextcluster;
}
actsector = actcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].CurrentCluster = actcluster;
gFiles[f].posinsector = gFiles[f].position & 0x01FF;
if (gFiles[f].posinsector == 0 && gFiles[f].position != 0) gFiles[f].posinsector = 512;
} else {
gFiles[f].position = 0;
actsector = ComposeCluster(f);
actsector += gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].CurrentCluster = ComposeCluster(f);
gFiles[f].posinsector = 0;
}
}
return f;
}
void fclose(char f)
{
//output_low(YELLOWLED);
if (f > (MAXFILES-1)) return;
if ((gFiles[f].mode == 'a') || (gFiles[f].mode == 'w')) fflush(f);
gFiles[f].Free = TRUE;
}
void fflush(char f){
int32 actsector;
DIR *pDir;
if (f > (MAXFILES-1)) return;
actsector = gFiles[f].CurrentCluster + gFAT32Vars.gFirstDataSector;
WriteSector(actsector,gFiles[f].IOpuffer);
ReadSector(gFiles[f].dirSector,gFiles[f].IOpuffer);
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*gFiles[f].dirIdx]));
if (gFiles[f].DirEntry.bAttr & 0x10) pDir->wSize = 0; // if it is a directory
else pDir->wSize = gFiles[f].position;
pDir->hDate = GetCurrentDOSDate();
pDir->hTime = GetCurrentDOSTime();
WriteSector(gFiles[f].dirSector,gFiles[f].IOpuffer);
ReadSector(actsector,gFiles[f].IOpuffer);
}
void fputch(char be, char f)
{
int32 nextcluster,actsector;
if (f > (MAXFILES-1)) return;
if (gFiles[f].posinsector == 512) {
actsector = gFiles[f].CurrentCluster + gFAT32Vars.gFirstDataSector;
WriteSector(actsector,gFiles[f].IOpuffer);
nextcluster = FindFirstFreeCluster();
if (nextcluster != 0x0FFFFFFF && nextcluster != 0) {
SetClusterEntry(gFiles[f].CurrentCluster,nextcluster);
SetClusterEntry(nextcluster,0x0FFFFFFF);
actsector = nextcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].CurrentCluster = nextcluster;
gFiles[f].posinsector = 0;
}
}
gFiles[f].IOpuffer[gFiles[f].posinsector] = be;
gFiles[f].posinsector++;
gFiles[f].position++;
}
void fputstring(char *be, char f)
{
int16 leng,i;
if (f > (MAXFILES-1)) return;
leng = strlen(be);
for (i=0;i<leng;i++)
fputch(be[i],f);
}
int16 fread(char *buffer, int16 leng, char f){
int16 i,retv;
char c,v;
if (f > (MAXFILES-1)) return 0;
retv = 0;
for (i=0;i<leng;i++) {
v = fgetch(&c,f);
if (v) {
buffer[i] = c;
retv++;
}
else break;
}
return retv;
}
void fwrite(char *buffer, int16 leng, char f)
{
int16 i;
if (f > (MAXFILES-1)) return;
for (i=0;i<leng;i++)
fputch(buffer[i],f);
}
char fgetch(char *ki,char f)
{
int32 nextcluster,actsector;
if (f > (MAXFILES-1)) return FALSE;
if (gFiles[f].position >= gFiles[f].DirEntry.wSize) return FALSE;
*ki = gFiles[f].IOpuffer[gFiles[f].posinsector];
gFiles[f].posinsector++;
gFiles[f].position++;
if (gFiles[f].posinsector == 512) {
nextcluster = GetNextCluster(gFiles[f].CurrentCluster);
if (nextcluster != 0x0FFFFFFF && nextcluster != 0) {
actsector = nextcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].CurrentCluster = nextcluster;
gFiles[f].posinsector = 0;
}
}
return TRUE;
}
char remove(char *fname)
{
char i,found;
char f;
DIR *pDir;
int32 nextcluster,currentcluster;
char *filename;
filename = TryFile(fname,&f);
if (filename == 0) return FALSE;
found = FindDirEntry(filename,f);
if (!found) {
gFiles[f].Free = TRUE;
return FALSE;
}
//output_high(YELLOWLED);
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*gFAT32Vars.gDirEntryIdx]));
pDir->sName[0] = 0xE5;
for (i=1;i<8;i++)
pDir->sName[i] = ' ';
for (i=0;i<3;i++)
pDir->spam[i] = ' ';
WriteSector(gFAT32Vars.gDirEntrySector,gFiles[f].IOpuffer);
currentcluster = ComposeCluster(f);
while (currentcluster != 0x0FFFFFFF && nextcluster != 0) {
nextcluster = GetNextCluster(currentcluster);
ClearClusterEntry(currentcluster);
currentcluster = nextcluster;
}
ClearClusterEntry(currentcluster);
SetClusterEntry(currentcluster,0);
currentcluster = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + gFAT32Vars.FATstartidx;
WriteSector(currentcluster,FATTable);
currentcluster += DiskInfo.hSectorsPerFat;
WriteSector(currentcluster,FATTable);
gFiles[f].Free = TRUE;
//output_low(YELLOWLED);
return TRUE;
}
char getfsize(char *fname, int32 *fsiz)
{
char found;
char f;
DIR *pDir;
char *filename;
filename = TryFile(fname,&f);
if (filename == 0) return FALSE;
found = FindDirEntry(filename,f);
if (!found) {
gFiles[f].Free = TRUE;
return FALSE;
}
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*gFAT32Vars.gDirEntryIdx]));
gFiles[f].Free = TRUE;
*fsiz = pDir->wSize;
return TRUE;
}
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neochrome32
Joined: 09 Jun 2013
Posts: 153
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| gofat.h |
| Posted: Mon Jun 10, 2013 9:02 pm |
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some more of Tomi's code, but in a seperate .h file
| Code: |
#define MAXFILES 1
typedef struct _diskinforec{
char hJumpCode[3];
char OEMName[8];
int16 hBytesPerSector;
char bSectorsPerCluster;
int16 Reserved1;
char FATCopies;
int16 hMaxRootEntries;
int16 hSectors;
char Descriptor;
int16 holdSectorsPerFat;
int16 hSectorsPerTrack;
int16 hNumberofHeads;
int32 hNumberofHidden;
int32 hNumberofSectors;
int32 hSectorsPerFat;
int16 hFlags;
int16 hFAT32Version;
int32 hRootStartCluster;
} diskinforec;
typedef struct {
int32 MMCAddress;
int32 FATstartidx;
int32 gStartSector;
int32 gFirstDataSector;
int16 gDirEntryIdx;
int32 gDirEntrySector;
int16 gFirstEmptyDirEntry;
int32 gFirstDirEntryCluster;
} FAT32Vars;
typedef struct _direntry{
char sName[8];
char spam[3];
char bAttr;
char bReserved[8];
int16 hClusterH;
int16 hTime;
int16 hDate;
int16 hCluster;
int32 wSize;
} DIR;
typedef struct {
char IOpuffer[512];
DIR DirEntry;
int32 CurrentCluster;
int16 posinsector;
int32 position;
int32 dirSector;
int16 dirIdx;
char mode;
char Free;
} FILE;
typedef struct {
unsigned long tm_year;
char tm_mon;
char tm_day;
char tm_mday;
char tm_hour;
char tm_min;
char tm_sec;
} TimeRecord;
TimeRecord myrec; // this variable is updated in regular intervals in DoIdle()
int32 FATTable[128];
int32 gFirstEmptyCluster;
FAT32Vars gFAT32Vars;
FILE gFiles[MAXFILES];
diskinforec DiskInfo;
#byte gStartSectorL = gFAT32Vars+8
#byte gStartSectorH = gFAT32Vars+9
#byte gStartSectorHL = gFAT32Vars+10
/* ----------------------- */
#define CardInserted 0
/* ----------------------- */
char MMCInit();
void ReadSector(int32 sector, char *hova);
void WriteSector(int32 sector, char *honnan);
//int32 InitFAT();
char FindDirEntry(char *fname, char f);
char fopen(char *fname, char mode);
void fclose(char f);
void fflush(char f);
char cwd(char *fname, char f);
void fputch(char be, char f);
char fgetch(char *ki, char f);
void fputstring(char *be, char f); // fputs is reserved in CCS C
int16 fread(char *buffer, int16 leng, char f);
void fwrite(char *buffer, int16 leng, char f);
char remove(char *fname);
char getfsize(char *fname, int32 *fsiz);
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demon52
Joined: 17 Jun 2013
Posts: 3
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| help me, plz |
| Posted: Mon Jun 17, 2013 3:53 pm |
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hi all,
I'm a newbie and my english is bad...
I used your lib and built a project with sdcard, but it can't write a text to text file. Please check my code:
| Code: |
void write_sdcard()
{
char file,filename[5];
strcpy(filename,"test.txt");
file = fopen(filename,'w'); //open test.txt for write ////
//fs=fopen(filename, 'a');
printf("Start writing... \r\n");
strcpy(buffer, "i want to make sure this works ok. \r\n");
fwrite(buffer, strlen(buffer),file);
//fputstring(buffer,file);
fclose(file);
printf("Write complete... \r\n");
/*
if (file & MMC_ERROR) ////
{
DEVICE_ON(LED_BLUE); ////
printf("Couldn't open file!\r\n"); ////
if(file == MMC_NO_CARD_INSERTED) ////
printf("Please, insert MMC!"); ////
else if(file == MMC_MAX_FILES_REACHED) ////
printf("ops.. =)"); ////
} ////
else ////
{
//#ZERO_RAM
DEVICE_ON(LED_RED);
DELAY_MS(1000);
//printf("Start writing...\r\n");
//fwrite(frame,13,file);
strcpy(buffer,"System started\r\n"); ////
//fputstring(buffer,file);
delay_ms(10);
fclose(file);
delay_ms(100);
//printf("Write complete...");
}
*/
delay_ms(100);
}
|
and lib.c
| Code: |
////////////////////////////////////////////////////////////////////////
/////////////////// FAT32 DRIVER FOR MMC OVER SPI //////////////////////
////////////////////////////////////////////////////////////////////////
//// Original code by Tamas Bodorics (Tomi), ////
//// http://www.ccsinfo.com/forum/viewtopic.php?t=23969 ////
//// Modified by Mattias "miniman" Eriksson, Sweden ////
//// Disclaimer: ////
//// This code is provided for you "AS IS", this means I can NOT be ////
//// held responsible for any damage or harm it may couse. ////
////////////////////////////////////////////////////////////////////////
//// Hardware: ////
//// This is the hardware I use. My pic is running at 5v, the MMC ////
//// at 3.3V, so I need voltage level conversion. That is what ////
//// the resistors and zener diodes are for. First a 820 ohm ////
//// resistor from is connected to the pic, then a 3.3V ////
//// zenerdiode is connected with its anode to ground and its ////
//// cathode to the resistor. This resistor-zenerdiode connection ////
//// leaves about 3V on the DATA/CS/CLOCK lines which is enough. ////
//// A 100K pull-up resistor from Data out(Do) of the MMC is ////
//// required. Note: this "picture" do not have the right pin ////
//// assignments. Hope you can see what I'm trying to paint.. ////
//// ////
//// __ __ 3x820 ohm ______________ ////
//// | U |--\/\/\----------- o---DATA->---|=2 | ////
//// | PIC |--\/\/\-------o----+---CS--->---|=1 | ////
//// | |--\/\/\--o----+----+---CLOCK>---|=5 MMC | ////
//// | | _|_, _|_, _|_, o--|=7 | ////
//// | | '/_\ '/_\ '/_\ | \_____________| ////
//// | | GND_|____|____|_GND | 100k ohm ////
//// |_____|-----------<-DATA-<----------o--\/\/\---<3.3V ////
//// ////
//// Notes: ////
//// - The card that is going to be used by this code has to be ////
//// pre-formated with FAT32, 512byte/sector. To do this, run cmd ////
//// and type the following command: ////
//// format X: /A:512 /V:LABEL /FS:FAT32 ////
//// where X is the diverletter of your card and LABEL is the ////
//// volyme name. This can also be done in the diskmanager ////
//// - Use '/' as directory separator, example: "MYDIR/ELEMENT.WND" ////
//// "MYDIR/SUBDIR/OTHER.TXT" etc. ////
//// ////
//// Functions: ////
//// MMCInit() ////
//// Initializes the MMC, this function must be called before ////
//// any other MMC functions, and at the top of the program. ////
//// Returns a MMCResponse. ////
//// InitFAT() ////
//// Initializes the FAT filesystem, this function must be ////
//// called before any other MMC functions and after MMCInit, ////
//// only if the later one returned MMC_OK. ////
//// Returns a MMCResponse. ////
//// InitList(char *path) ////
//// Initializes file and directory listing in the any ////
//// directory that is specified by path. To list files and ////
//// directorys in root directory path should be a empty ////
//// string(""). Ottherwise path should end with a "/" e.g: ////
//// "DIR/SUBDIR/". Returns a filehandle. ////
//// Listfiles(char f) ////
//// List files and directorys in any directory that have been ////
//// openes by InitList(). Access the list through FileList ////
//// array. See examples. There can only be one file handle ////
//// open for file listing at the same time. Returns the ////
//// number of files and directorys that where listed. ////
//// NextPage(char f) ////
//// To be able to handle many files in a dir, file listing ////
//// is parted up in pages. To list next page, call NextPage ////
//// and then ListFiles again. ListFiles must be called ////
//// before a NextPage function, otherwise the function will ////
//// not have any effect. Returns a MMCResponse. ////
//// SetPage(char f) ////
//// Set the page that you want to list, see above function ////
//// to get better understanding. Note: no need to call ////
//// ListFiles before this function. Returns a MMCResponse. ////
//// CloseList(char f) ////
//// Closes filelisting, in other words, the there are an ////
//// extra free file handle to use. Returns a MMCResponse ////
//// FreeList() ////
//// Frees all the strings in FileList array. This function ////
//// is called before any new files are listed in ListFiles ////
//// but not in CloseList. THis means you can access the last ////
//// listed files even though you already have closed the ////
//// list. But to free the mem that are used by FileList call ////
//// this function. ////
//// fopen(char *fname, char mode) ////
//// Opens a file specified by fname in the desired mode. ////
//// Valid modes are: 'r' = read, 'w' = write and 'a' = append ////
//// No long filenames can be used. To open a file with long ////
//// filename, listed by ListFiles(), use the shortName field ////
//// in the FileList, FileList[i].shortName. Note: ListFiles ////
//// do only filename, not the path.. ////
//// Returns a filehandle if succeed, else a errorcode ////
//// fclose(char f) ////
//// Closes a file that previously have been opened by fopen. ////
//// Returns a MMCResponse ////
//// fputch(char be, char f) ////
//// Puts a char, be, in file f that previously have been ////
//// opened by fopen. Returns a MMCResponse ////
//// fgetch(char *ki, char f) ////
//// get a char from file f that previously have been opened ////
//// by fopen, and puts it at the position specified by ki ////
//// Returns a MMCSresponse ////
//// fputstring(char *be, char f) ////
//// puts a entire string to file f that previously have been ////
//// opened by fopen. Returns MMCResponse ////
//// fread(char *buffer, int16 leng, char f) ////
//// Reads a block of data with length leng from file f that ////
//// previously have been opened by fopen. ////
//// Returns the number of bytes that were read. ////
//// fwrite(char *buffer, int16 leng, char f) ////
//// Writes a block of data with length leng to a file f that ////
//// previously have been opened by fopen. ////
//// Returns a MMCResponse ////
//// getfsize(char *fname, int32 *fsiz) ////
//// Reads the size of a file with a filename specified by ////
//// fname. Returns a MMCResponse. ////
//// ////
//// Examples: ////
//// // This example open a file for append, and writes "System ////
//// // started". It also shows small error handling ////
//// char f,gfilename[12]; ////
//// strcpy(gfilename,"EVENTS.LOG"); ////
//// f = fopen(gfilename,'a'); // open EVENTS.LOG for append ////
//// if (f & MMC_ERROR) ////
//// { ////
//// printf("Couldn't open file!\r\n"); ////
//// if(f == MMC_NO_CARD_INSERTED) ////
//// printf("Please, insert MMC!"); ////
//// else if(f == MMC_MAX_FILES_REACHED) ////
//// printf("ops.. =)"); ////
//// } ////
//// else ////
//// { ////
//// strcpy(msg,"System started\r\n"); ////
//// fputstring(msg,f); ////
//// fclose(f); ////
//// } ////
//// ////
//// // Here is a exampel that covers almost everything... ////
//// // It first lists all files and dirs in DIR/ and then open ////
//// // The first and prints the file with printf, take a look: ////
//// #include <MMC_SPI_FAT32.h> // As usual you also need to ////
//// #include <MMC_SPI_FAT32.c> // include your device .h file... ////
//// void main(void) ////
//// { ////
//// char f,filename[20],res,i,c; ////
//// while(TRUE) ////
//// { ////
//// if(MMCInit() == MMC_OK) ////
//// { ////
//// printf("MMC initialized\r\n"); ////
//// InitFAT(); ////
//// strcpy(filename,"DIR/"); ////
//// f = InitList(filename); ////
//// if(f & MMC_ERROR) ////
//// printf("Error"); ////
//// else ////
//// { ////
//// do ////
//// { ////
//// res = ListFiles(f); ////
//// for(i=0;i<res;i++) ////
//// { ////
//// printf(FileList[i].name); ////
//// if(FileList[i].isDir) ////
//// printf("\\\r\n");//a "\" with row break ////
//// else ////
//// printf("\r\n"); ////
//// } ////
//// } while(NextPage(f) == MMC_OK); ////
//// CloseList(f); // frees the file, but the list is ////
//// } // still there... ////
//// strcpy(filename,FileList[0].shortName); ////
//// f = open(filename,'r'); // open file for reading ////
//// if((f & MMC_ERROR) == 0) // No error, same as ////
//// { // if(f < MAXFILES) ////
//// while(fgetch(&c,f) == MMC_OK) ////
//// printf(c); ////
//// fclose(f); ////
//// } ////
//// else if(f == MMC_NOT_FOUND) ////
//// printf("1st file in list was probebly a dir"); ////
//// else ////
//// printf("Other error\r\n"); ////
//// while(TRUE) ////
//// ; // Loop forever, program is finished ////
//// } ////
//// else ////
//// printf("MMC init failed!\r\n"); ////
//// delay_ms(1000); ////
//// printf("Trying once more..\r\n"); ////
//// } ////
//// } ////
//// ////
////////////////////////////////////////////////////////////////////////
//// Changelog: ////
//// YYYY-MM-DD VER LOG ////
//// 2007-08-15 0.9 Fixed a hardware SPI error in writesector. ////
//// Thanks to wielen who found the bug. ////
//// 2007-07-25 0.8 This, and almost all other text is written ////
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
// If you want to use software SPI keep this line uncommented
// If you want to use hardware SPI comment this line..
// Software SPI are slower, but you can use any clock and data
// pins that you want..
#define MMC_SPI_SOFTWARE
// Change the port to whatever port you are going to use
#use FAST_IO(B)
// Change this to set the right tris for your pins
#define SET_MMC_TRIS() set_tris_b(0x10) // 0b0001000 1=input,0=output
// Change these pins to whatever pins you are using
#define ChipSel pin_C2 // Chip-Select pin
#define ChipClk pin_C5 // SPI-Clock pin
#define ChipDout pin_C4 // SPI-Data out pin
#define ChipDin pin_C3 // SPI-Data in pin
#ifdef MMC_SPI_SOFTWARE
// You can also specify a baud-rate in the line below, if not the fastest possible speed will be used.
// For me that was 800kHz on a 18F4550 with 48MHz external clock
#USE SPI(MASTER, SAMPLE_RISE, MSB_FIRST, IDLE=1, DI=ChipDin, DO=ChipDout, CLK=ChipClk, BITS=8, STREAM=MMC_SPI)
#define MMC_Xfer(a) SPI_Xfer(MMC_SPI,a)
#else
// If MMC_SPI_SOFTWARE isn't defined (se above) these variables are used, you should check if they
// matches your target device, but for most pic's they should do
#byte SSPBUF = 0xFC9
#byte SSPSTAT = 0xFC7
#byte SSPCON1 = 0xFC6
#bit BF = SSPSTAT.0
#endif
#ifdef ENABLE_FILELISTNG
#include <STDLIBM.H> // used for malloc and free functions
#endif
int32 FATTable[128];
int32 gFirstEmptyCluster;
FAT32Vars gFAT32Vars;
diskinforec DiskInfo;
FILE gFiles[MAXFILES];
// Time stores the date and time, this is used when writing and/or creating files
TimeRecord Time;
#ifdef ENABLE_FILELISTNG
// Set the maximum number of files/dirs to be listed by Listfile()
#define MAX_FILE_LIST 10
// Variables used by InitList(), ListFiles(), NextPage() and SetPage()
ListPos StartList;
ListPos CurrentList;
BOOLEAN changeList; // Do not use this; it is only used by SetPage() and ListFiles() and Initialized by InitFAT()
// The result of ListFiles() function..
LongFileName FileList[MAX_FILE_LIST];
#endif
#byte MMCAddressL = gFAT32Vars
#byte MMCAddressH = gFAT32Vars+1
#byte MMCAddressHL = gFAT32Vars+2
#byte MMCAddressHH = gFAT32Vars+3
#byte gStartSectorL = gFAT32Vars+8
#byte gStartSectorH = gFAT32Vars+9
#byte gStartSectorHL = gFAT32Vars+10
// You should check that these values matches your pic device
// but for most devices they should be correct
#define FSR0L *0xFE9
#define POSTINC0 *0xFEE
// A bunch of error codes
#define MMC_OK 0
#define MMC_ERROR 0x80
#define MMC_INVALID_FILE 0x88
#define MMC_MAX_FILES_REACHED 0x90
#define MMC_NO_CARD_INSERTED 0x98
#define MMC_TIME_OUT 0xA0
#define MMC_INVALID_RESPONSE 0xA8
#define MMC_NOT_FOUND 0xB0
#define MMC_INVALID_CLUSTER 0xB8
#define MMC_END_OF_DIR 0xC0
#define MMC_INVALID_POSITION 0xC8
// I don't like having constants in the code... yeah, I do have some anyway ;)
#define END_OF_DIR 17
#define DIRENTRYS_PER_SECTOR 16
#define CHARACTERS_IN_LONG_FILENAMES 13
// If you want to have a cardinserted sens-pin, define CardInserted to a input, like:
// #define CardInserted !input(PIN_XX)
// MMC Card have two GND pins, pull one up with a resistor (10K or somwthing like that) to Vcc
// and connect to desired pin
#define CardInserted() 1
// Looks a bit nicer in the code
#define MMC_Select() output_low(ChipSel)
#define MMC_Deselect() output_high(ChipSel)
// Below this, there should be no need to change anything
char IsSelfDir(char *be)
{
if (be[0] == '.' && be[1] == '.')
return 0xFF;
else
return 0;
}
void MMCOut(char indata)
{
#ifdef MMC_SPI_SOFTWARE
MMC_Xfer(indata);
#else
char i;
SSPBUF=indata;
while (!BF);
i = SSPBUF;
#endif
}
void MMC8Clock()
{
#ifdef MMC_SPI_SOFTWARE
MMC_Xfer(0xFF);
#else
char i;
SSPBUF=0xFF;
while (!BF);
i = SSPBUF;
#endif
}
char MMCIn()
{
#ifdef MMC_SPI_SOFTWARE
return MMC_Xfer(0xFF);
#else
char i;
SSPBUF=0xFF;
while (!BF);
i = SSPBUF;
return i;
#endif
}
MMCResponse MMCInit()
{
char response,iii,errcnt;
if (!CardInserted())
return MMC_NO_CARD_INSERTED;
SET_MMC_TRIS(); // Set input/output
restart_wdt();
MMC_Deselect();
#ifndef MMC_SPI_SOFTWARE
bit_clear(SSPCON1,5); // Disables serial port and configures these pins as I/O port pins
SSPCON1 = 0x30; // modify this number to change SPI clock rate
// Enables serial port and configures SCK, SDO, SDI and SS as serial port pins
// Idle state for clock is a high level
// 0000 = SPI Master mode, clock = FOSC/4
SSPSTAT = 0; // Only bit 6,7 are writable
// 0 = Input data sampled at middle of data output time
// 0 = Transmit occurs on transition from Idle to active clock state
#endif
iii = 10;
errcnt = 100;
do
{
MMCOut(0xFF);
} while (--iii);
delay_us(1000);
MMC_Select(); // if the /CS line of the MMC is low during CMD0,(below), the card enters SPI-mode
MMCOut(0x40); // CMD0
MMCOut(0x00);
MMCOut(0x00);
MMCOut(0x00);
MMCOut(0x00);
MMCOut(0x95); // CRC
MMC8Clock();
response = MMCIn();
MMC_Deselect();
do
{
delay_us(1000);
//output_low(ChipClk);
MMC_Select();
MMCOut(0x41); // CMD1
MMCOut(0x00);
MMCOut(0x00);
MMCOut(0x00);
MMCOut(0x00);
MMCOut(0x01);
MMC8Clock();
response = MMCIn();
MMC_Deselect();
MMC8Clock();
errcnt--;
} while (response && errcnt);
if(response == 0)
return MMC_OK;
else
return MMC_TIME_OUT;
}
// "Packed" Date:
// +-------+------------+-------+-----+
// | BITS | 15:9 | 8:5 | 4:0 |
// | VALUE |Year – 1980 | Month | Day |
// +-------+------------+-------+-----+
int16 GetCurrentDOSDate()
{
int16 retval;
retval = Time.Year - 1980;
retval <<= 9;
retval |= ((int16)Time.Month << 5);
retval |= (int16)Time.Day;
return retval;
}
// "Packed" Time:
// +-------+-------+--------+----------+
// | BITS | 15:11 | 10:5 | 4:0 |
// | VALUE | Hour | Minute | Second/2 |
// +-------+-------+--------+----------+
int16 GetCurrentDOSTime()
{
int16 retval;
retval = Time.Hour;
retval <<= 11;
retval |= ((int16)Time.Minute << 5);
retval |= (int16)Time.Second >> 1;
return retval;
}
// Function: Reads a sector from MMC
MMCResponse ReadSector(int32 sector, char *hova)
{
char errs,response;
char cnt2,cnt3;
#byte sectorL = sector
#byte sectorH = sector+1
#byte sectorHL = sector+2
if (!CardInserted())
return MMC_NO_CARD_INSERTED;
Disable_interrupts(GLOBAL);
Restart_wdt();
MMCAddressL = 0;
MMCAddressH = sectorL;
MMCAddressHL = sectorH;
MMCAddressHH = sectorHL;
gFAT32Vars.MMCAddress <<= 1;
MMC_Select();
MMCOut(0x51);
MMCOut(MMCAddressHH);
MMCOut(MMCAddressHL);
MMCOut(MMCAddressH & 0xFE);
MMCOut(0);
MMCOut(0x01);
errs = 8;
do
{
response = MMCIn();
} while (--errs && response==0xFF);
errs = 50;
do
{
response = MMCIn();
if (response == 0xFE)
break;
delay_ms(1);
} while (--errs);
FSR0L = (int16)hova; // *0xFE9
cnt3 = 2;
cnt2 = 0;
do
{
do
{
#ifdef MMC_SPI_SOFTWARE
POSTINC0 = MMC_Xfer(0xFF); // *0xFEE
#else
SSPBUF=0xFF; // Writes 0xFF on SPI
while(!BF); // Wait until Transmitted/Received
POSTINC0 = SSPBUF; // Read the received byte and place it in adress oxFEE
#endif
} while (--cnt2);
} while (--cnt3);
response = MMCIn();
response = MMCIn();
MMC_Deselect();
Enable_interrupts(GLOBAL);
return MMC_OK;
}
// Writes a sector to MMC
MMCResponse WriteSector(int32 sector, char *honnan)
{
char errs,response;
char cnt2,cnt3;
#byte sectorL = sector
#byte sectorH = sector+1
#byte sectorHL = sector+2
if (!CardInserted())
return MMC_NO_CARD_INSERTED;
Disable_interrupts(GLOBAL);
Restart_wdt();
MMCAddressL = 0;
MMCAddressH = sectorL;
MMCAddressHL = sectorH;
MMCAddressHH = sectorHL;
gFAT32Vars.MMCAddress <<= 1;
response = 0;
//output_low(ChipClk);
MMC_Select();
MMCOut(0x58);
MMCOut(MMCAddressHH);
MMCOut(MMCAddressHL);
MMCOut(MMCAddressH & 0xFE);
MMCOut(0);
MMCOut(0x01);
MMC8Clock();
errs = 8;
do
{
response = MMCIn();
} while (--errs && response==0xFF);
if (response)
{
MMC_Deselect();
//output_high(ChipClk);
MMC8Clock();
Enable_interrupts(GLOBAL);
return MMC_INVALID_RESPONSE;
}
MMC8Clock();
MMCOut(0xFE);
FSR0L = (int16)honnan; // *0xFE9
cnt3 = 2;
cnt2 = 0;
do
{
do
{ /*
*/
#ifdef MMC_SPI_SOFTWARE
MMC_Xfer(POSTINC0); // *0xFEE
#else
SSPBUF=POSTINC0; // Write the byte on address oxFEE to SPI
while (!BF);
response = SSPBUF; // thanks to wielen
#endif
} while (--cnt2);
} while (--cnt3);
MMCOut(0x00);
MMCOut(0x01);
response = MMCIn();
response ^= 0xE5; // Bitwise exclusive or assignment operator, x^=y, is the same as x=x^y
if (response)
{
goto endwr3;
}
do
{
response = MMCIn();
} while (response == 0);
response = 0;
endwr3:
MMC_Deselect();
//output_high(ChipClk);
MMC8Clock();
Enable_interrupts(GLOBAL);
return MMC_OK;
}
// Function: Initializes the FAT system
void InitFAT()
{
int32 actsector;
char i;
gFirstEmptyCluster = 0;
gFAT32Vars.gStartSector = 0;
ReadSector(gFAT32Vars.gStartSector,gFiles[MAXFILES-1].IOpuffer);
if (gFiles[MAXFILES-1].IOpuffer[0] != 0xEB)
{
gStartSectorL = gFiles[MAXFILES-1].IOpuffer[0x1C6];
gStartSectorH = gFiles[MAXFILES-1].IOpuffer[0x1C7];
gStartSectorHL = gFiles[MAXFILES-1].IOpuffer[0x1C8];
ReadSector(gFAT32Vars.gStartSector,gFiles[MAXFILES-1].IOpuffer);
}
memcpy(&DiskInfo,gFiles[MAXFILES-1].IOpuffer,sizeof(DiskInfo));
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1;
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = 0;
gFAT32Vars.gFirstDataSector = gFAT32Vars.gStartSector + DiskInfo.FATCopies*DiskInfo.hSectorsPerFat+DiskInfo.Reserved1 - 2;
for (i=0;i<MAXFILES;i++)
{
gFiles[i].Free = TRUE;
}
#ifdef ENABLE_FILELISTNG
// Code for initializing file-listing
for(i=0;i<MAX_FILE_LIST;i++)
FileList[i].name = NULL;
changeList = TRUE;
#endif
// MMC_Debug("-FATInit ");
}
int32 GetNextCluster(int32 curcluster)
{
int32 actsector;
int32 clpage;
char clpos;
clpage = curcluster >> 7;
clpos = curcluster & 0x7F;
if (clpage != gFAT32Vars.FATstartidx) // read in the requested page
{
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + clpage;
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = clpage;
}
return (FATTable[clpos]);
}
void SetClusterEntry(int32 curcluster,int32 value)
{
int32 actsector;
int32 clpage;
char clpos;
clpage = curcluster >> 7;
clpos = curcluster & 0x7F;
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + clpage;
if (clpage != gFAT32Vars.FATstartidx)
{
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = clpage;
}
FATTable[clpos] = value;
WriteSector(actsector,FATTable);
actsector += DiskInfo.hSectorsPerFat;
WriteSector(actsector,FATTable);
}
void ClearClusterEntry(int32 curcluster)
{
int32 actsector;
int32 clpage;
char clpos;
clpage = curcluster >> 7;
clpos = curcluster & 0x7F;
if (clpage != gFAT32Vars.FATstartidx)
{
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + gFAT32Vars.FATstartidx;
WriteSector(actsector,FATTable);
actsector += DiskInfo.hSectorsPerFat;
WriteSector(actsector,FATTable);
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + clpage;
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = clpage;
}
FATTable[clpos] = 0;
}
int32 FindFirstFreeCluster()
{
int32 i,st,actsector,retval;
char j;
st = gFirstEmptyCluster;
for (i=st;i<DiskInfo.hSectorsPerFat;i++)
{
if (i != gFAT32Vars.FATstartidx)
{
actsector = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + i;
ReadSector(actsector,FATTable);
gFAT32Vars.FATstartidx = gFirstEmptyCluster = i;
}
for (j=0;j<128;j++)
{
if (FATTable[j] == 0)
{
retval = i;
retval <<= 7;
retval |= j;
return retval;
}
}
}
return 0x0FFFFFFF;
}
// Function: Converts a dir-entry to a 8.3 filename
void ConvertFilename(DIR *beDir,char *name)
{
char i,j,c;
j = 0;
name[0] = 0;
for (i=0;i<8;i++)
{
c = beDir->sName[i];
if (c == ' ')
break;
name[j++] = c;
}
for (i=0;i<3;i++)
{
c = beDir->spam[i];
if (c == ' ' || c == 0)
break;
if (!i)
name[j++] = '.';
name[j++] = c;
}
name[j++] = 0;
}
// Function: Converts a dir-entry to a (part of a) long filename.
// One dir-entry can hold 13 unicode characters
void ConvertLongFilename(DIR *beDir,char *name)
{
char i,j,c;
j = 0;
name[0] = 0;
for (i=1;i<11;i+=2)
{
c = (char)(*(((char*)beDir)+i));
if (c == 0x00 || c == 0xFF)
break;
name[j++] = c;
}
if(c!=0x00 && c!= 0xFF)
{
for (i=14;i<26;i+=2)
{
c = (char)(*(((char*)beDir)+i));;
if (c == 0 || c == 0xFF)
break;
name[j++] = c;
}
if(c!=0x00 && c != 0xFF)
{
for (i=28;i<31;i+=2)
{
c = (char)(*(((char*)beDir)+i));
if (c == 0 || c == 0xFF)
break;
name[j++] = c;
}
}
}
name[j++] = 0;
}
void GetDOSName(DIR *pDir, char *fname)
{
char i,j,leng,c,toext;
toext = FALSE;
j = 0;
leng = strlen(fname);
for (i=0;i<8;i++)
pDir->sName[i] = ' ';
for (i=0;i<3;i++)
pDir->spam[i] = ' ';
for (i=0;i<leng;i++)
{
c = fname[i];
c = toupper(c);
if (c == '.')
{
toext = TRUE;
continue;
}
if (toext)
pDir->spam[j++] = c;
else
pDir->sName[i] = c;
}
}
// Function: Sets the file f to root dir
MMCResponse ReadRootDirectory(char fil)
{
int32 actsector;
if (fil > (MAXFILES-1))
return MMC_INVALID_FILE;
actsector = gFAT32Vars.gStartSector + DiskInfo.FATCopies*DiskInfo.hSectorsPerFat+DiskInfo.Reserved1;
ReadSector(actsector,gFiles[fil].IOpuffer);
gFAT32Vars.gDirEntrySector = actsector;
gFiles[fil].dirSector = actsector;
gFiles[fil].dirIdx = 0;
memcpy(&(gFiles[fil].DirEntry),gFiles[fil].IOpuffer,32);
gFiles[fil].CurrentCluster = DiskInfo.hRootStartCluster;
return MMC_OK;
}
// Funciton: Finds a file
char FindDirEntry(char *fname,char f)
{
DIR *pDir;
int16 i;
char filename[16];
int32 nextcluster,actsector;
if (f > (MAXFILES-1))
{
return FALSE;
}
gFAT32Vars.gFirstEmptyDirEntry = 0xFF;
gFAT32Vars.gFirstDirEntryCluster = 0x0FFFFFFF;
do
{
pDir = (DIR*)(gFiles[f].IOpuffer);
for (i=0;i<DIRENTRYS_PER_SECTOR;i++)
{
if ((pDir->sName[0] == 0xE5 || pDir->sName[0] == 0) && gFAT32Vars.gFirstEmptyDirEntry == 0xFF) // store first free
{
gFAT32Vars.gFirstEmptyDirEntry = i;
gFAT32Vars.gFirstDirEntryCluster = gFiles[f].CurrentCluster;
}
if (pDir->sName[0] == 0)
{
return FALSE;
}
ConvertFilename(pDir,filename);
if (!strcmp(filename,fname))
{
memcpy(&(gFiles[f].DirEntry),pDir,32);
gFiles[f].dirIdx = i;
gFAT32Vars.gDirEntryIdx = i;
return TRUE;
}
pDir++;
}
nextcluster = GetNextCluster(gFiles[f].CurrentCluster);
if (nextcluster != 0x0FFFFFFF && nextcluster != 0)
{
actsector = nextcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFAT32Vars.gDirEntrySector = actsector;
gFiles[f].dirSector = actsector;
gFiles[f].CurrentCluster = nextcluster;
}
} while (nextcluster != 0x0FFFFFFF && nextcluster != 0);
return FALSE;
}
// Function: Assign a filenumber(f) and open the directory
// where the file are and return the filename.
char* TryFile(char *fname, char *f)
{
char i,leng;
char *filename;
*f = 0xFF;
for (i=0;i<MAXFILES;i++)
{
if (gFiles[i].Free)
{
*f = i;
break;
}
}
if (*f == 0xFF)
{
return 0;
}
ReadRootDirectory(*f);
filename = fname;
leng = strlen(fname);
for (i=0;i<leng;i++)
{
if (fname[i] == '/')
{
fname[i] = 0;
if (!cwd(filename,*f))
{
gFiles[*f].Free = TRUE;
return 0;
}
filename = fname+i+1;
}
}
return filename;
}
void strfill(char *dest,char *source,int position)
{
char *d;
for(d=dest+position; *source!=0; d++, source++)
{
*d = *source;
}
}
// Parameters: path, the path to the directory you
// want to view
// Function : Initializes file/dir listing
// Examples:
// strcpy(path,""); // the "path" to the root directory
// f = InitList(path);
// ...
// strcpy(path,"DIR3/DIR32/");
// f = InitList(path);
// if(InitList == MMC_OK)
// {
// res = Listfiles(f);
// CloseList(f);
// }
#ifdef ENABLE_FILELISTNG
MMCResponse InitList(char *path)
{
char f;
if(TryFile(path,&f) == 0)
{
return MMC_NOT_FOUND;
}
gFiles[f].Free = FALSE;
StartList.dirSector = gFiles[f].dirSector;
StartList.CurrentCluster = gFiles[f].CurrentCluster;
StartList.dirIdx = 0;
CurrentList.dirSector = gFiles[f].dirSector;
CurrentList.CurrentCluster = gFiles[f].CurrentCluster;
CurrentList.dirIdx = 0;
return f;
}
// Function: Lists a part (aka page) of the files in the directory
// specified by InitList()
// Returns : The number of files/dirs that were listed
int8 ListFiles(char f)
{
DIR *pDir;
char filename[(CHARACTERS_IN_LONG_FILENAMES+1)]; // should be enough with 13+1
char i,u,fni,len;
BOOLEAN isLongFileName = FALSE;
int32 nextcluster,actsector;
if (f > (MAXFILES-1))
return 0;
if(changeList)
{
FreeList();
}
if((gFiles[f].CurrentCluster != CurrentList.CurrentCluster) || (gFiles[f].dirSector != CurrentList.dirSector))
{
gFiles[f].dirSector = CurrentList.dirSector;
gFiles[f].CurrentCluster = CurrentList.CurrentCluster;
ReadSector(gFiles[f].dirSector,gFiles[f].IOpuffer);
}
gFiles[f].dirIdx = CurrentList.dirIdx;
u=0;
do
{
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*(int16)gFiles[f].dirIdx]));
for (i=gFiles[f].dirIdx;i<DIRENTRYS_PER_SECTOR;i++) // loop throu all direntrys in the sector
{
if ((pDir->sName[0] != 0xE5 && pDir->sName[0] != 0)) // if file/dir isn't deleted and isn't the end of the directory
{
if(pDir->bAttr != 0x0F) // Normal filename (8.3)
{
if(isLongFilename) // If this is the short version of the long filename, just save the number
{
if(changeList)
{
FileList[u].shortName = malloc(13); // 8.3 = 8chars + '.' + 3chars + 0x00
FileList[u].isLong = TRUE;
ConvertFilename(pDir,filename);
strcpy(FileList[u].shortName,filename); // copy the 8.3 name of the file
}
u++;
isLongFilename = FALSE;
if(u == MAX_FILE_LIST)
{
gFiles[f].dirIdx = i+1;
return u;
}
}
else // normal 8.3 filename
{
if(changeList)
{
ConvertFilename(pDir,filename);
FileList[u].name = malloc(strlen(filename)+1); // +1 for char 0x00
strcpy(FileList[u].name,filename);
FileList[u].shortName = FileList[u].name; // point to same string
FileList[u].isLong = FALSE;
if(pDir->bAttr & 0x10) // is directory
FileList[u].isDir = TRUE;
else
FileList[u].isDir = FALSE;
}
u++;
if(u == MAX_FILE_LIST)
{
gFiles[f].dirIdx = i+1;
return u;
}
}
}
else if((pDir->bAttr & 0x0F) == 0x0F) // If it is a long filename entry
{
fni = (pDir->sName[0] & 0x3F); // Filename Index
if((pDir->sName[0] & 0x40)) // First LongFilename entry, the last characters of a long filename
{
if(changeList)
{
ConvertLongFilename(pDir,filename);
len = strlen(filename)+CHARACTERS_IN_LONG_FILENAMES*(fni-1); // Length of the long filename
FileList[u].name = malloc(len+1);// number of chars in this strinng + 13 in each other long filname entry
FileList[u].name[len] = 0x00; // set last char to 0
strfill(FileList[u].name,filename,(fni-1)*CHARACTERS_IN_LONG_FILENAMES); //Fills the name from position (fni-1)*13
if(pDir->bAttr & 0x10) // is directory
FileList[u].isDir = TRUE;
else
FileList[u].isDir = FALSE;
}
isLongFilename = TRUE;
}
else if((pDir->sName[0] & 0x80) == 0) // If it is a long filname, but not deleted
{
if(isLongfilename && changeList)
{
ConvertLongFilename(pDir,filename);
strfill(FileList[u].name,filename,(fni-1)*CHARACTERS_IN_LONG_FILENAMES); //Fills the name from position (fni-1)*13
}
else ;
//printf(glcd_putc,"NoLongFileName!");
}
}
}
if (pDir->sName[0] == 0)
{
gFiles[f].dirIdx = END_OF_DIR;
return u;
}
pDir++;
}
nextcluster = GetNextCluster(gFiles[f].CurrentCluster);
if (nextcluster != 0x0FFFFFFF && nextcluster != 0)
{
actsector = nextcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].dirSector = actsector;
gFiles[f].CurrentCluster = nextcluster;
gFiles[f].dirIdx = 0;
}
} while (nextcluster != 0x0FFFFFFF && nextcluster != 0);
gFiles[f].dirIdx = END_OF_DIR;
return u;
}
// Function: Go to next page in the file/dir list
// Returns : MMCResponse
MMCResponse NextPage(char f)
{
int32 nextcluster,actsector;
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
CurrentList.dirSector = gFiles[f].dirSector;
CurrentList.CurrentCluster = gFiles[f].CurrentCluster;
if(gFiles[f].dirIdx == DIRENTRYS_PER_SECTOR)
{
nextcluster = GetNextCluster(gFiles[f].CurrentCluster);
if (nextcluster != 0x0FFFFFFF && nextcluster != 0)
{
actsector = nextcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
CurrentList.dirSector = actsector;
CurrentList.CurrentCluster = nextcluster;
CurrentList.dirIdx = 0;
return MMC_OK;
}
return MMC_INVALID_CLUSTER;
}
else if(gFiles[f].dirIdx == END_OF_DIR)
{
return MMC_END_OF_DIR; // Last file/dir have already been listed by ListFiles
}
else
{
CurrentList.dirIdx = gFiles[f].dirIdx;
}
return MMC_OK;
}
// Note: 0 = first page
MMCResponse SetPage(char f, int32 page)
{
int32 i;
MMCResponse res;
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
CurrentList.dirSector = StartList.dirSector;
CurrentList.CurrentCluster = StartList.CurrentCluster;
CurrentList.dirIdx = StartList.dirIdx; // should always be 0
changeList = FALSE; // this tells the ListFiles function to not change the list, just loop through files
for(i=0;i<page;i++)
{
ListFiles(f);
res = NextPage(f);
if(res != MMC_OK)
{
changeList = TRUE;
return res;
}
}
changeList = TRUE;
return MMC_OK;
}
MMCResponse CloseList(char f)
{
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
gFiles[f].Free = TRUE;
return MMC_OK;
}
void FreeList()
{
int i;
for(i=0;i<MAX_FILE_LIST;i++)
{
if(FileList[i].isLong) // If it is a long filename, name and short name are different string
free(FileList[i].shortName); // then free both
else
FileList[i].shortName = NULL;
free(FileList[i].name); // else free ONLY name(they point to same string..)
}
}
#endif// ENABLE_FILELISTNG
// Function: Creates a file
MMCResponse fcreate(char f,char *fname)
{
DIR *pDir;
int32 actsector,actcl;
int16 i;
if (f > (MAXFILES-1))
{
return MMC_INVALID_FILE;
}
if (gFAT32Vars.gFirstDirEntryCluster == 0x0FFFFFFF)
{
// extend the directory file !!!
gFAT32Vars.gFirstDirEntryCluster = FindFirstFreeCluster();
gFAT32Vars.gFirstEmptyDirEntry = 0;
SetClusterEntry(gFiles[f].CurrentCluster,gFAT32Vars.gFirstDirEntryCluster);
SetClusterEntry(gFAT32Vars.gFirstDirEntryCluster,0x0FFFFFFF);
actsector = gFAT32Vars.gFirstDirEntryCluster + gFAT32Vars.gFirstDataSector;
for (i=0;i<512;i++)
gFiles[f].IOpuffer[i] = 0;
WriteSector(actsector,gFiles[f].IOpuffer);
}
actsector = gFAT32Vars.gFirstDirEntryCluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*(int16)gFAT32Vars.gFirstEmptyDirEntry]));
gFiles[f].dirSector = actsector;
gFiles[f].dirIdx = gFAT32Vars.gFirstEmptyDirEntry;
GetDOSName(pDir,fname);
pDir->bAttr = 0;
actcl = FindFirstFreeCluster();
pDir->hCluster = actcl & 0xFFFF;
pDir->hClusterH = actcl >> 16;
SetClusterEntry(actcl,0x0FFFFFFF);
pDir->wSize = 0;
gFiles[f].position = 0;
pDir->hDate = GetCurrentDOSDate();
pDir->hTime = GetCurrentDOSTime();
WriteSector(actsector,gFiles[f].IOpuffer);
memcpy(&(gFiles[f].DirEntry),pDir,32);
return MMC_OK;
}
int32 ComposeCluster(char f)
{
int32 retval;
retval = gFiles[f].DirEntry.hClusterH;
retval <<= 16;
retval |= gFiles[f].DirEntry.hCluster;
return retval;
}
// Function: Opens a file with the specified mode
// Returns : A file handle or error code
MMCResponse fopen(char *fname, char mode)
{
char found;
char f;
int32 actsector,actcluster,nextcluster;
char *filename;
if (!CardInserted())
return MMC_NO_CARD_INSERTED;
filename = TryFile(fname,&f);
if (filename == 0)
{
return MMC_NOT_FOUND; // probebly invalid directory
}
found = FALSE;
found = FindDirEntry(filename,f);
if (!found)
{
if (mode == 'r')
{
gFiles[f].Free = TRUE;
return MMC_NOT_FOUND;
}
else
{
if (fcreate(f,filename) != MMC_OK)
return MMC_NOT_FOUND;
found = TRUE;
}
}
if (found)
{
gFiles[f].Free = FALSE;
gFiles[f].mode = mode;
if (mode == 'a')
{
gFiles[f].position = gFiles[f].DirEntry.wSize;
actcluster = ComposeCluster(f);
while (actcluster != 0x0FFFFFFF && nextcluster != 0)
{
nextcluster = GetNextCluster(actcluster);
if (nextcluster == 0x0FFFFFFF || nextcluster == 0)
break;
actcluster = nextcluster;
}
actsector = actcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].CurrentCluster = actcluster;
gFiles[f].posinsector = gFiles[f].position & 0x01FF;
if (gFiles[f].posinsector == 0 && gFiles[f].position != 0)
gFiles[f].posinsector = 512;
}
else
{
gFiles[f].position = 0;
actsector = ComposeCluster(f);
actsector += gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].CurrentCluster = ComposeCluster(f);
gFiles[f].posinsector = 0;
}
}
return f;
}
// Function: closes a open file and makes it avavible for a new file
MMCResponse fclose(char f)
{
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
if ((gFiles[f].mode == 'a') || (gFiles[f].mode == 'w'))
fflush(f);
gFiles[f].Free = TRUE;
return MMC_OK;
}
// Function: writes the chach to the MMC
MMCResponse fflush(char f)
{
int32 actsector;
DIR *pDir;
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
actsector = gFiles[f].CurrentCluster + gFAT32Vars.gFirstDataSector;
WriteSector(actsector,gFiles[f].IOpuffer);
ReadSector(gFiles[f].dirSector,gFiles[f].IOpuffer);
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*gFiles[f].dirIdx]));
if (gFiles[f].DirEntry.bAttr & 0x10) // if it is a directory
pDir->wSize = 0;
else
pDir->wSize = gFiles[f].position;
pDir->hDate = GetCurrentDOSDate();
pDir->hTime = GetCurrentDOSTime();
WriteSector(gFiles[f].dirSector,gFiles[f].IOpuffer);
ReadSector(actsector,gFiles[f].IOpuffer);
return MMC_OK;
}
// Function: Enter a specified directory
char cwd(char *fname, char f)
{
int32 actsector;
if (f > (MAXFILES-1))
{
return FALSE; // just in case of overaddressing
}
if (IsSelfDir(fname))
{
return TRUE; // already in Root dir
}
if (!FindDirEntry(fname,f))
{
return FALSE; // not found
}
actsector = ComposeCluster(f);
actsector += gFAT32Vars.gFirstDataSector; // read current dir
ReadSector(actsector,gFiles[f].IOpuffer);
gFAT32Vars.gDirEntrySector = actsector;
gFiles[f].dirSector = actsector;
gFiles[f].CurrentCluster = ComposeCluster(f);
return TRUE;
}
// Function: Put a char to the open file
MMCResponse fputch(char be, char f)
{
int32 nextcluster,actsector;
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
if (gFiles[f].posinsector == 512)
{
actsector = gFiles[f].CurrentCluster + gFAT32Vars.gFirstDataSector;
WriteSector(actsector,gFiles[f].IOpuffer);
nextcluster = FindFirstFreeCluster();
if (nextcluster != 0x0FFFFFFF && nextcluster != 0)
{
SetClusterEntry(gFiles[f].CurrentCluster,nextcluster);
SetClusterEntry(nextcluster,0x0FFFFFFF);
actsector = nextcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].CurrentCluster = nextcluster;
gFiles[f].posinsector = 0;
}
}
gFiles[f].IOpuffer[gFiles[f].posinsector] = be;
gFiles[f].posinsector++;
gFiles[f].position++;
return MMC_OK;
}
// Function: Puts a string to the open file
MMCResponse fputstring(char *be, char f)
{
int16 leng,i;
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
leng = strlen(be);
for (i=0;i<leng;i++)
fputch(be[i],f);
return MMC_OK;
}
// Function: Read a buffer from the open file
int16 fread(char *buffer, int16 leng, char f)
{
int16 i,retv;
char c,v;
if (f > (MAXFILES-1))
return 0;
retv = 0;
for (i=0;i<leng;i++)
{
v = fgetch(&c,f);
if (v == MMC_OK)
{
buffer[i] = c;
retv++;
}
else
break;
}
return retv;
}
// Function: Write a buffer to the open file
MMCResponse fwrite(char *buffer, int16 leng, char f)
{
int16 i;
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
for (i=0;i<leng;i++)
fputch(buffer[i],f);
return MMC_OK;
}
// Function: Read a char from the open file
MMCResponse fgetch(char *ki,char f)
{
int32 nextcluster,actsector;
if (f > (MAXFILES-1))
return MMC_INVALID_FILE;
if (gFiles[f].position >= gFiles[f].DirEntry.wSize)
return MMC_INVALID_POSITION;
*ki = gFiles[f].IOpuffer[gFiles[f].posinsector];
gFiles[f].posinsector++;
gFiles[f].position++;
if (gFiles[f].posinsector == 512)
{
nextcluster = GetNextCluster(gFiles[f].CurrentCluster);
if (nextcluster != 0x0FFFFFFF && nextcluster != 0)
{
actsector = nextcluster + gFAT32Vars.gFirstDataSector;
ReadSector(actsector,gFiles[f].IOpuffer);
gFiles[f].CurrentCluster = nextcluster;
gFiles[f].posinsector = 0;
}
}
return MMC_OK;
}
// Function: Removes a file
MMCResponse remove(char *fname)
{
char i,found;
char f;
DIR *pDir;
int32 nextcluster,currentcluster;
char *filename;
filename = TryFile(fname,&f);
if (filename == 0)
return MMC_NOT_FOUND;
found = FindDirEntry(filename,f);
if (!found)
{
gFiles[f].Free = TRUE;
return MMC_NOT_FOUND;
}
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*(int16)gFAT32Vars.gDirEntryIdx]));
pDir->sName[0] = 0xE5;
for (i=1;i<8;i++)
pDir->sName[i] = ' ';
for (i=0;i<3;i++)
pDir->spam[i] = ' ';
WriteSector(gFAT32Vars.gDirEntrySector,gFiles[f].IOpuffer);
currentcluster = ComposeCluster(f);
while (currentcluster != 0x0FFFFFFF && nextcluster != 0)
{
nextcluster = GetNextCluster(currentcluster);
ClearClusterEntry(currentcluster);
currentcluster = nextcluster;
}
ClearClusterEntry(currentcluster);
SetClusterEntry(currentcluster,0);
currentcluster = gFAT32Vars.gStartSector+DiskInfo.Reserved1 + gFAT32Vars.FATstartidx;
WriteSector(currentcluster,FATTable);
currentcluster += DiskInfo.hSectorsPerFat;
WriteSector(currentcluster,FATTable);
gFiles[f].Free = TRUE;
return MMC_OK;
}
// Function: Gets the size of a file
MMCResponse getfsize(char *fname, int32 *fsiz)
{
char found;
char f;
DIR *pDir;
char *filename;
filename = TryFile(fname,&f);
if (filename == 0)
return MMC_NOT_FOUND;
found = FindDirEntry(filename,f);
if (!found)
{
gFiles[f].Free = TRUE;
return MMC_NOT_FOUND;
}
pDir = (DIR*)(&(gFiles[f].IOpuffer[32*(Int16)gFAT32Vars.gDirEntryIdx]));
gFiles[f].Free = TRUE;
*fsiz = pDir->wSize;
return MMC_OK;
}
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demon52
Joined: 17 Jun 2013
Posts: 3
|
|
| Posted: Mon Jun 17, 2013 4:51 pm |
|
|
and lib.h
| Code: |
#define MAXFILES 1 // This define specifies the maximum number
// of simultaneously open files, more files
// requires more ram. The maximun number of
// this define is 8, this is because of my
// error handlig.. but that should be more
// then enough..
// This enable functions and variables needed for filelisting
// If you aren't going to use it, comment this line out to
// save some RAM
#define ENABLE_FILELISTNG
typedef struct _diskinforec
{
char hJumpCode[3];
char OEMName[8];
int16 hBytesPerSector;
char bSectorsPerCluster;
int16 Reserved1;
char FATCopies;
int16 hMaxRootEntries;
int16 hSectors;
char Descriptor;
int16 holdSectorsPerFat;
int16 hSectorsPerTrack;
int16 hNumberofHeads;
int32 hNumberofHidden;
int32 hNumberofSectors;
int32 hSectorsPerFat;
int16 hFlags;
int16 hFAT32Version;
int32 hRootStartCluster;
} diskinforec;
typedef struct _direntry
{
char sName[8];
char spam[3];
char bAttr;
char bReserved[8];
int16 hClusterH;
int16 hTime;
int16 hDate;
int16 hCluster;
int32 wSize;
} DIR;
typedef struct
{
char IOpuffer[512];
DIR DirEntry;
int32 CurrentCluster;
int16 posinsector;
int32 position;
int32 dirSector;
int8 dirIdx;
char mode;
BOOLEAN Free;
} FILE;
typedef struct
{
int32 MMCAddress;
int32 FATstartidx;
int32 gStartSector;
int32 gFirstDataSector;
int8 gDirEntryIdx;
int32 gDirEntrySector;
int8 gFirstEmptyDirEntry;
int32 gFirstDirEntryCluster;
} FAT32Vars;
typedef struct
{
unsigned long Year;
char Month;
char Day;
char Hour;
char Minute;
char Second;
} TimeRecord;
typedef struct
{
int32 dirSector;
int32 CurrentCluster;
int dirIdx;
} ListPos;
typedef struct
{
char *name;
char *shortName;
BOOLEAN isDir;
BOOLEAN isLong;
} LongFileName;
typedef char MMCResponse;
MMCResponse MMCInit();
MMCResponse ReadSector(int32 sector, char *hova);
MMCResponse WriteSector(int32 sector, char *honnan);
void InitFAT();
char FindDirEntry(char *fname, char f);
#ifdef ENABLE_FILELISTNG
MMCResponse InitList(char *path);
int8 ListFiles(char f);
MMCResponse NextPage(char f);
MMCResponse SetPage(char f, int32 page);
MMCResponse CloseList(char f);
void FreeList();
#endif
MMCResponse fopen(char *fname, char mode);
MMCResponse fclose(char f);
MMCResponse fflush(char f);
char cwd(char *fname, char f);
MMCResponse fputch(char be, char f);
MMCResponse fgetch(char *ki, char f);
MMCResponse fputstring(char *be, char f); // fputs is reserved in CCS C
int16 fread(char *buffer, int16 leng, char f);
MMCResponse fwrite(char *buffer, int16 leng, char f);
MMCResponse remove(char *fname);
MMCResponse getfsize(char *fname, int32 *fsiz);
|
My hardward is ok, init MMC, init FAT is OK...
Thank so much
Regards |
|
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neochrome32
Joined: 09 Jun 2013
Posts: 153
|
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| Posted: Tue Jun 25, 2013 7:36 pm |
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It looks like your missing an opcode;
| Code: |
fwrite(buffer, strlen(buffer),file);
|
you need to use
since your writing to the fat, the buffer is a pointer reference, so you need to type it like....
| Code: |
fwrite(&buffer, strlen(buffer),file);
|
also, sorry for the late reply.
what PIC are you using? |
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demon52
Joined: 17 Jun 2013
Posts: 3
|
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| Posted: Tue Jun 25, 2013 10:35 pm |
|
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Hi neochrome32,
Thanks for your help,
In my project, i have tried add a opcode
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fwrite(buffer, strlen(buffer),file);
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and
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fputstring(char *be, char f);
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but not complete...
I use pic 18F4620. |
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zamzam23
Joined: 25 Aug 2010
Posts: 47
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| Posted: Tue Nov 13, 2018 12:15 am |
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| is this library work with SD cards? |
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