B4R Question SOLVED SD. How to create a directory tree.

[tigrot]

Hi everybody,
since there is no directory handling in rSD library, how can I create my directory tree?
I have seen that sd library included in Arduino environment includes mkdir() and rmdir() and is referenced by rSD.

Regards
Mauro Zanin

 

[Erel]

Please try the attached library. Make sure to copy it to the internal libraries folder.

 

[tigrot]

Hi Erel, I updated the SD library in Arduino environment and substituted the rSD library. I can write and read files(in root) but mkdir seems not to work.
This is my code:

Main.sd.MKDir("/logmetalim")
Main.sd.MKDir("/logmetalim/segnala")

I have read that the second mkdir could suffice, since the whole tree is created at once, differently from other enviromnents.
I have also tried to call mkdir from inline code and got no result. But my code could be wrong...

 

[Erel]

MKDir returns a boolean. Check its value.

Try it with:

Log(Main.sd.MKDir("logmetalim")) 'without the slash (https://www.arduino.cc/en/Reference/SDmkdir)

 

[tigrot]

This is code fixed:

Log("mkdir:",Main.sd.MKDir("logmetalim"))
Log("mkdir2:",Main.sd.MKDir("logmetalim/segnala"))

This is log

mkdir:0
mkdir2:0

Let me check about FAT in SD, maybe it's an unsupported type?

 

[tigrot]

Checked, the SD is now FAT32 for sure. The files are created and appended. Directories are not created.

 

[Erel]

The SD file system should be FAT. Preferably FAT16.

I tested it here with FAT32 and it worked properly.

    Log(sd.MKDir("test"))
   Log(sd.RMDIR("test"))

Logs:
1
1

The folder was created.

 

[tigrot]

I have prepared a simple one statement sketch, to test library. It does create the directory. Dunno why but in my app the statement is not executed correctly.
Let me investigate my environment.

 

[tigrot]

I moved the directories' creation in AppStart. No way to create directories. In my test sketch everything is good. I upload my whole project for your reference.
Thank you for help

 

[Erel]

Probably a conflict with another library.

See how the SD is enabled and disabled in this example: https://www.b4x.com/android/forum/threads/arduino-pc-file-transfer.67682/#content

 

[tigrot]

No conflict... I reintroduced the Windows names(10 bytes long) for directory. 8.3 is the max for Fat16/32. reducing the directory's name length to 8 is working.
The strange that directory creation seems to work only at the very first beginning, but it's a wise solution, because it's were it should be.
Thank you for support.
Mauro