[En-Nut-Discussion] Problems with PHAT on MMC with ethernut 3, NutOS 4.4.0

[Harald Kipp]

Ole Reinhardt schrieb:
> 
> mmc_volume = _open("MMC0:1/PHAT0", _O_RDWR | _O_BINARY);
> 
> later closed with:
> 
> _close(mmc_volume);

Any reason for not leaving it open? I'm not sure about closing volumes.

> Reading the root directory seem to work, reading a just created
> directory only shows:
> 
> Mounting mmc volume0, partition0 as PHAT filesystem... ok.
> Filename: .
> Filename: ..
> Entry == NULL
> 
> Which meens that I only get the . and .. entry even if the directory is
> full with files.

You mean full of files
1. created by Nut/OS
or
2. created on another computer?

In case 1 the card may have been removed without flushing the buffer 
contents. In case 2 there might be a format incompatibility (although I 
never saw any MMC with FAT not readable by Nut/OS).


> Trying to create a new directory corrupts the filesystem. Here is my code:
> 
>     if (mkdir(dirname, 0755) != 0) {
>         ERROR("Could not create directory %s : error %d\r\n", dirname, errno);
>     }

I'm sure it won't. Did you try the ftpserv sample?

Even this sample is quite complex and not really usable for bug 
approval. Can you please send a stripped down sample via private email? 
I'll also send a small test application directly to you.

> I found the following just closed bug in the tracker:
> 
> https://sourceforge.net/tracker/?func=detail&aid=1714704&group_id=34079&atid=410687

This had been automatically closed, after I asked for a simpler example 
and there had been no response within 14 days.

> Complete test code can be provided!

See above. But please keep it as simple as possible.

Harald