we are using STM32F205 controller board, and tried to read the files in a directory in SD card.
we are able to mount the SD card successfully also we are able to create the file and read the file, however we are not able to count the number of files also the file names.
we are trying the below code
NOT WORKING CODE
FRESULT scan_files (
char* path /* Start node to be scanned (***also used as work area***) */
)
{
FRESULT res;
DIR dir;
UINT i;
static FILINFO fno;
res = f_opendir(&dir, path); /* Open the directory */
if (res == FR_OK) {
for (;;) {
res = f_readdir(&dir, &fno); /* Read a directory item */
if (res != FR_OK || fno.fname[0] == 0) break; /* Break on error or end of dir */
if (fno.fattrib & AM_DIR) { /* It is a directory */
i = strlen(path);
sprintf(&path[i], "/%s", fno.fname);
res = scan_files(path); /* Enter the directory */
if (res != FR_OK) break;
path[i] = 0;
} else { /* It is a file. */
printf("%s/%s\n", path, fno.fname); --> THIS LINE IS NOT AT ALL EXECUTING EVEN THOUGH FILES ARE EXISTING IN THE SD CARD
}
}
f_closedir(&dir);
}
return res;
}
int main (void)
{
FATFS fs;
FRESULT res;
char buff[256];
res = f_mount(&fs, "", 1);
if (res == FR_OK) {
strcpy(buff, "/");
res = scan_files(buff);
}
return res;
}
WORKING CODE
FRESULT res;
FATFS SDFatFs; /* File system object for SD disk logical drive */
FIL MyFile; /* File object */
FRESULT fr;
char str[15];
UINT br, bw; // File read/write count
/**** capacity related *****/
FATFS *pfs;
DWORD fre_clust;
uint32_t total, free_space;
#define BUFFER_SIZE 128
char buffer[BUFFER_SIZE]; // to store strings..
int i=0;
int bufsize (char *buf)
{
int i=0;
while (*buf++ != '\0') i++;
return i;
}
void clear_buffer (void)
{
for (int i=0; i<BUFFER_SIZE; i++) buffer[i] = '\0';
}
res = f_mount(&SDFatFs, (TCHAR const*)SDPath, 0);
if (res != FR_OK)
while(1);
res= f_open(&MyFile, "STM32test.TXT", FA_WRITE);
if (res != FR_OK)
while(1);
/* Writing text */
int ret;
ret = f_puts("Hello world", &MyFile);
f_close(&MyFile);
res = f_open(&MyFile, "STM32test.TXT", FA_READ);
if (res != FR_OK)
while(1);
f_gets(buffer, f_size(&MyFile), &MyFile);
