hi,
I was trying to open Jpeg files from SD card and show them on LCD. LCD works, SDMMC works, I open the File System, I can read if its FAT32, I can read free space etc. But When I want to open a file or create a file on system it fails.
* I always get FR_NO_FILE when I want to read a file.
* There is no error when I want to create a file and write something in it. But When I put the SD on PC There is no such file in it.
* Also I cannot read the label of the SDCard.
* Dcache disable & enable does not change the result.
Here is my Code sample :
** I've tried "0:" lately but it does not changed anything. What should I do ?
void process_SD_card( void )
{
FATFS FatFs; //Fatfs handle
FIL fil; //File handle
FRESULT fres; //Result after operations
char buf[100];
FRESULT res;
char buff[20];
int x=0;
do
{
//Mount the SD Card
fres = f_mount(&FatFs, "0:", 1); //1=mount now
if (fres != FR_OK)
{
printf("No SD Card found : (%i)\r\n", fres);
break;
}
printf("SD Card Mounted Successfully!!!\r\n");
//Read the SD Card Total size and Free Size
FATFS *pfs;
DWORD fre_clust;
uint32_t totalSpace, freeSpace;
f_getfree("0:", &fre_clust, &pfs);
totalSpace = (uint32_t)((pfs->n_fatent - 2) * pfs->csize * 0.5);
freeSpace = (uint32_t)(fre_clust * pfs->csize * 0.5);
printf("TotalSpace : %lu bytes, FreeSpace = %lu bytes\n", totalSpace, freeSpace);
char str[12];
f_getlabel("0:", str, 0);
strcpy(buff, "/");
res = list_dir(buff);
//Open the file
fres = f_open(&fil, "0:/emre.txt", FA_WRITE | FA_CREATE_NEW);
if(fres != FR_OK)
{
printf("File creation/open Error : (%i)\r\n", fres);
break;
}
printf("Writing data!!!\r\n");
//write the data
f_puts("Welcome to EmbeTronicX", &fil);
//close your file
f_close(&fil);
//Open the file
fres = f_open(&fil, "1.txt", FA_READ);
if(fres != FR_OK)
{
printf("File opening Error : (%i)\r\n", fres);
break;
}
//read the data
f_gets(buf, sizeof(buf), &fil);
printf("Read Data : %s\n", buf);
//close your file
f_close(&fil);
printf("Closing File!!!\r\n");
} while( x );
//We're done, so de-mount the drive
f_mount(NULL, "", 0);
printf("SD Card Unmounted Successfully!!!\r\n");
}
