SD Card

[nechi]

Posted on March 30, 2017 at 18:49

Hi, 

I'm using the cubeF4 to work on FATFS application and i'm searching for a function in FATFS library that can return the content of the SD Card: number of files and their names.  

Thank you.

[Tesla DeLorean]

Posted on March 30, 2017 at 19:12

You'll have to write such code, the FATFS library provides functions like f_opendir, f_readdir, you'd use these to process and count files in the current directory, and you'd need recurse and descend into the directories you encounter at each level.

[nechi]

Posted on March 31, 2017 at 10:11

Thank you, i'll understand more FATFS functions 

[Imen.D]

Posted on March 30, 2017 at 19:21

Hi,

There is FatFs_uSD example on STM32CubeF4 firmware package that can help you to use most of the features offered by FatFs and to configure a microSD drive.

You can get help from the User manual UM1721'Developing Applications on STM32Cube with FatFs'

Imen

[nechi]

Posted on March 31, 2017 at 10:13

Thank you Imen, i'm already working with the 

FatFs_uSD example, i'll see this manual.

[john doe]

Posted on April 01, 2017 at 03:15

http://elm-chan.org/fsw/ff/en/readdir.html

the code example doesn't print the count, but it does walk the directory tree and print the contents

[nechi]

Posted on April 03, 2017 at 15:25

Thank you all, all your suggestions were helpful 

I saved files in a directory created in the SD Card and i just used the function '

f_readdir' 

into a loop to count files in my directory

f_opendir (&dir,'mydirectory');

while (1)

{

   res_dir = f_readdir(&dir, &fno);

   if((res_dir==FR_OK)&&(fno.fname[0]!= 0))

   {

      nb_file_dir++;

   }

}

[Tesla DeLorean]

Posted on April 03, 2017 at 16:31

That will also count sub-directories, you should also check the attributes.

[nechi]

Posted on April 11, 2017 at 18:02

My SDcard is 8GB with one directory where i save files from the F4 discovery and it works well. Now i faced some problems, i added an other directory (2.6Gbyte) in the sd card and it's not related to the first one. when i save new files in the first directory i notice that the old ones are overwritten with 'UUUUUU...'. Did you know this issue please? I can't understand why they are modified even though i didn't opened any of them with the stm32 i just count the number of the existing files in the directory and then i create new ones