Mounting/Accessing SD-Card on BBB

Nils Hölscher nilhoel1 at gmail.com
Fri Aug 16 10:08:48 UTC 2019


Ok.
But back to the bug.
The behaviour I described should be reproducible by removing SD-Card after
it was mounted.
And then the System should freeze when open is called on some file on
SD-Card.
System freezes can't be wanted behaviour.

Best,
Nils

On Fri, 16 Aug 2019 at 11:40, Christian Mauderer <list at c-mauderer.de> wrote:

> PS: If neither the SD nor the eMMC has a bootable image your BBB falls
> back to serial and then USB boot anyway. So no need to change any boot
> pins.
>
> On 16/08/2019 11:38, Christian Mauderer wrote:
> > Hello Nils,
> >
> > if the U-Boot doesn't start from eMMC any more it won't be easy.
> > Theoretically it is possible to boot via serial. See for example
> >
> >
> http://linuxkernel51.blogspot.com/2015/08/booting-beagle-bone-black-over-uart.html
> >
> > With that you could load an U-Boot (via X-Modem) that could start a
> > system from USB (image from Beagle home page maybe could work if it can
> > boot from USB) that could re-write the eMMC. Most likely it would need a
> > few hours to a day to figure out the details. So you should definitively
> > order a replacement as a backup solution.
> >
> > Best regards
> >
> > Christian
> >
> > On 16/08/2019 11:13, Nils Hölscher wrote:
> >> Hi Christin,
> >>
> >> Thanks for the hint.
> >> But how can I alter the U- Boot on eMMC?
> >> Problem is I have a Linux version with an U-Boot that disables emmc on
> >> the emmc...
> >> And I guess I cant flash emmc without SD.
> >>
> >> Best,
> >> Nils
> >>
> >> On Fri, 16 Aug 2019 at 11:03, Christian Mauderer <list at c-mauderer.de
> >> <mailto:list at c-mauderer.de>> wrote:
> >>
> >>     On 16/08/2019 10:55, Nils Hölscher wrote:
> >>     > Hi,
> >>     >
> >>     > It seems the problem was hardware related.
> >>     > My SD-Card connector just died.
> >>     > I hope I can get a new BBB oin a timely manner.
> >>     >
> >>     > Best,
> >>     > Nils
> >>
> >>     Hello Nils,
> >>
> >>     thanks for the information. That's annoying. Good luck finding a
> >>     replacement.
> >>
> >>     For a quick workaround: I haven't tried that yet but if your
> on-board
> >>     eMMC is still intact, you might can use that U-Boot to boot from
> USB.
> >>
> >>     Best regards
> >>
> >>     Christian
> >>
> >>     >
> >>     > On Fri, 16 Aug 2019 at 10:48, Christian Mauderer
> >>     <list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>> wrote:
> >>     >
> >>     >     Hello Nils,
> >>     >
> >>     >     thanks for the file list. I can't reproduce your problem with
> it.
> >>     >
> >>     >     On 16/08/2019 10:01, Nils Hölscher wrote:
> >>     >     > Hi,
> >>     >     >
> >>     >     > Short update.
> >>     >     >
> >>     >     > It seems the device only hangs while I am connected with the
> >>     debugger.
> >>     >
> >>     >     Is that true for the original file system tree? You are
> >>     debugging via
> >>     >     Ethernet, right? In that case I would lean more toward a
> >>     problem with
> >>     >     the debugger support than the file system. Do you have enough
> file
> >>     >     descriptors configured?
> >>     >
> >>     >     Best regards
> >>     >
> >>     >     Christian
> >>     >
> >>     >     > looks like a Heisenberg bug.
> >>     >     >
> >>     >     > Best,
> >>     >     > Nils
> >>     >     >
> >>     >     > On Fri, 16 Aug 2019 at 09:50, Nils Hölscher
> >>     <nilhoel1 at gmail.com <mailto:nilhoel1 at gmail.com>
> >>     >     <mailto:nilhoel1 at gmail.com <mailto:nilhoel1 at gmail.com>>
> >>     >     > <mailto:nilhoel1 at gmail.com <mailto:nilhoel1 at gmail.com>
> >>     <mailto:nilhoel1 at gmail.com <mailto:nilhoel1 at gmail.com>>>> wrote:
> >>     >     >
> >>     >     >
> >>     >     >     On Thu, 15 Aug 2019 at 19:51, Christian Mauderer
> >>     >     <list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     >     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>> wrote:
> >>     >     >
> >>     >     >         Hello Nils,
> >>     >     >
> >>     >     >         maybe another bug in our FAT file system...
> >>     >     >
> >>     >     >         Please do three things:
> >>     >     >
> >>     >     >         1. Create an image of your current card (with dd or
> >>     a similar
> >>     >     >         tool). FAT
> >>     >     >         bugs are sometimes hard to reproduce but it's really
> >>     >     urgent that
> >>     >     >         we fix
> >>     >     >         them. So maybe I'll ask for that image later.
> >>     >     >
> >>     >     >     I did that.
> >>     >     >     Let me know if you need the image.
> >>     >     >
> >>     >     >         2. Create a complete list of the files on your card
> (for
> >>     >     example the
> >>     >     >         Linux `tree -h` command), post it here and tell me
> >>     what you
> >>     >     >         tried to open.
> >>     >     >
> >>     >     >      .
> >>     >     >     ├── [ 50K]  am335x-boneblack.dtb
> >>     >     >     ├── [ 49K]  am335x-boneblack+pruss.dtb
> >>     >     >     ├── [ 883]  AM335X-PRU-UIO-00A0.dtbo
> >>     >     >     ├── [ 649]  AM335X-PRU-UIO-BSD-00A0.dtbo
> >>     >     >     ├── [162K]  Linux-with-UIO.dtb
> >>     >     >     ├── [  44]  loob.bin
> >>     >     >     ├── [108K]  MLO
> >>     >     >     ├── [2.1M]  pru.exe.img
> >>     >     >     ├── [  12]  test.bin
> >>     >     >     ├── [471K]  u-boot.img
> >>     >     >     ├── [ 390]  uEnvLinuxfdt.txt
> >>     >     >     └── [ 560]  uEnv.txt
> >>     >     >
> >>     >     >          3. Try another name / folder for the file you
> wanted to
> >>     >     open.\
> >>     >     >
> >>     >     >     I moved the file in another folder and renamed it.
> >>     >     >     It now works but I got en error, I am currently
> >>     investigating if
> >>     >     >     this is on the pru driver side or not.
> >>     >     >     The tree while doing this was:
> >>     >     >     .
> >>     >     >     ├── [ 50K]  am335x-boneblack.dtb
> >>     >     >     ├── [ 49K]  am335x-boneblack+pruss.dtb
> >>     >     >     ├── [ 883]  AM335X-PRU-UIO-00A0.dtbo
> >>     >     >     ├── [ 649]  AM335X-PRU-UIO-BSD-00A0.dtbo
> >>     >     >     ├── [162K]  Linux-with-UIO.dtb
> >>     >     >     ├── [  44]  loob.bin
> >>     >     >     ├── [108K]  MLO
> >>     >     >     ├── [2.1M]  pru.exe.img
> >>     >     >     ├── [2.0K]  test
> >>     >     >     │   └── [  12]  test2.bin
> >>     >     >     ├── [  12]  test2.bin
> >>     >     >     ├── [471K]  u-boot.img
> >>     >     >     ├── [ 390]  uEnvLinuxfdt.txt
> >>     >     >     └── [ 560]  uEnv.txt
> >>     >     >
> >>     >     >
> >>     >     >     Thanks,
> >>     >     >     Nils
> >>     >     >
> >>     >     >         Best regards
> >>     >     >
> >>     >     >         Christian
> >>     >     >
> >>     >     >         On 15/08/2019 19:32, Nils Hölscher wrote:
> >>     >     >         > Hi Christian,
> >>     >     >         >
> >>     >     >         > The commands ls and cat work.
> >>     >     >         > I just tested them, this seems kinda awkward.
> >>     >     >         >
> >>     >     >         > Best,
> >>     >     >         > Nils
> >>     >     >         >
> >>     >     >         > On Thu, 15 Aug 2019 at 19:27, Christian Mauderer
> >>     >     >         <list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> >>     >     >         > <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>> wrote:
> >>     >     >         >
> >>     >     >         >     Hello Nils,
> >>     >     >         >
> >>     >     >         >     does some other access to the file system
> >>     work? Like
> >>     >     a ls
> >>     >     >         on the console
> >>     >     >         >     or creating a file. Can you do a `cat` on some
> >>     text file
> >>     >     >         on the file
> >>     >     >         >     system? If not: Does it work for a file in the
> >>     root file
> >>     >     >         system (should
> >>     >     >         >     be a IMFS)?
> >>     >     >         >
> >>     >     >         >     Best regards
> >>     >     >         >
> >>     >     >         >     Christian
> >>     >     >         >
> >>     >     >         >     On 15/08/2019 15:54, Nils Hölscher wrote:
> >>     >     >         >     > Hi,
> >>     >     >         >     >
> >>     >     >         >     > I when my app wants to open a file on the SD
> >>     card
> >>     >     >         dev=mmcsd-0-0 rtems
> >>     >     >         >     > freezes.
> >>     >     >         >     > Exact call is:
> >>     >     >         >     > fd = open(file, O_RDONLY);
> >>     >     >         >     > With file being the pru binary I want to
> upload.
> >>     >     >         >     >
> >>     >     >         >     > Thanks,
> >>     >     >         >     > Nils
> >>     >     >         >     >
> >>     >     >         >     > On Tue, 13 Aug 2019 at 17:56, Christian
> Mauderer
> >>     >     >         >     > <christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>
> >>     >     >         <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>>
> >>     >     >         >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>
> >>     >     >         <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>>>
> >>     >     >         >     >
> >>     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>
> >>     >     >         <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>>
> >>     >     >         >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>
> >>     >     >         <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>>>>> wrote:
> >>     >     >         >     >
> >>     >     >         >     >     Hello Nils,
> >>     >     >         >     >
> >>     >     >         >     >     a third possibility: You could start a
> >>     FTP server
> >>     >     >         and push the
> >>     >     >         >     file
> >>     >     >         >     >     via network.
> >>     >     >         >     >
> >>     >     >         >     >     Best regards
> >>     >     >         >     >
> >>     >     >         >     >     Christian
> >>     >     >         >     >
> >>     >     >         >     >     Am Dienstag, 13. August 2019 schrieb
> Nils
> >>     >     Hölscher:
> >>     >     >         >     >     > Hi,
> >>     >     >         >     >     >
> >>     >     >         >     >     >
> >>     >     >         >     >     > Thanks for the input I will try the SD
> >>     card
> >>     >     first.
> >>     >     >         >     >     > That way I won't have to alter the
> >>     code when I
> >>     >     >         want to run other
> >>     >     >         >     >     stuff on the pru.
> >>     >     >         >     >     >
> >>     >     >         >     >     >
> >>     >     >         >     >     > Best,
> >>     >     >         >     >     > Nils
> >>     >     >         >     >     >
> >>     >     >         >     >     >
> >>     >     >         >     >     > On Tue, 13 Aug 2019 at 17:32, Gedare
> Bloom
> >>     >     >         <gedare at rtems.org <mailto:gedare at rtems.org>
> >>     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>>
> >>     >     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>
> >>     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>>>
> >>     >     >         >     <mailto:gedare at rtems.org
> >>     <mailto:gedare at rtems.org> <mailto:gedare at rtems.org
> >>     <mailto:gedare at rtems.org>>
> >>     >     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>
> >>     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>>>>
> >>     >     >         >     >     <mailto:gedare at rtems.org
> >>     <mailto:gedare at rtems.org>
> >>     >     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>>
> >>     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>
> >>     >     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>>>
> >>     >     >         <mailto:gedare at rtems.org <mailto:gedare at rtems.org>
> >>     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>>
> >>     >     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>
> >>     <mailto:gedare at rtems.org <mailto:gedare at rtems.org>>>>>> wrote:
> >>     >     >         >     >     >
> >>     >     >         >     >     > You can also build the PRU image into
> >>     the RTEMS
> >>     >     >         binary. See
> >>     >     >         >     >     > examples-v2.git/file_io/crc/init.c
> >>     >     >         >     >     >
> >>     >     >         >     >     > On Tue, Aug 13, 2019 at 8:46 AM
> Christian
> >>     >     Mauderer
> >>     >     >         >     >     <list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> >>     >     >         <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>
> >>     >     >         >     <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> >>     >     >         <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>>> wrote:
> >>     >     >         >     >     > >
> >>     >     >         >     >     > > Hello Nils,
> >>     >     >         >     >     > >
> >>     >     >         >     >     > > that's a bit odd. I attached an
> expected
> >>     >     output
> >>     >     >         below.
> >>     >     >         >     Some guesses:
> >>     >     >         >     >     > >
> >>     >     >         >     >     > > - Did you add FAT file system to
> your
> >>     >     application?
> >>     >     >         >     >     > > - Is there some odd formatting on
> >>     the SD?
> >>     >     >         Normally at
> >>     >     >         >     least the FAT
> >>     >     >         >     >     > > partition used by U-Boot should be
> >>     visible.
> >>     >     >         >     >     > > - Is your BDBUF configuration OK?
> >>     >     >         >     >     > > - Do you have enough file
> descriptors?
> >>     >     >         >     >     > >
> >>     >     >         >     >     > > Beneath that: If you only need
> >>     something where
> >>     >     >         you can put
> >>     >     >         >     some
> >>     >     >         >     >     files,
> >>     >     >         >     >     > > you can try to connect a USB stick
> >>     instead.
> >>     >     >         Maybe that
> >>     >     >         >     works better.
> >>     >     >         >     >     > >
> >>     >     >         >     >     > > Best regards
> >>     >     >         >     >     > >
> >>     >     >         >     >     > > Christian
> >>     >     >         >     >     > >
> >>     >     >         >     >     > >
> >>     >     >         >     >     > > media listener: event = DISK ATTACH,
> >>     state =
> >>     >     >         INQUIRY, src
> >>     >     >         >     = mmcsd
> >>     >     >         >     >     > > media listener: event = DISK ATTACH,
> >>     state =
> >>     >     >         SUCCESS, src =
> >>     >     >         >     >     mmcsd, dest
> >>     >     >         >     >     > > = /dev/mmcsd-0
> >>     >     >         >     >     > > media listener: event = MOUNT,
> state =
> >>     >     INQUIRY,
> >>     >     >         src =
> >>     >     >         >     /dev/mmcsd-0
> >>     >     >         >     >     > > mmcsd0: 4GB <SDHC TO 15.15 SN
> >>     000002F6 MFG
> >>     >     >         02/2017 by 25
> >>     >     >         >     DY> at mmc0
> >>     >     >         >     >     > > 24.0MHz/4bit/65535-block
> >>     >     >         >     >     > > media listener: event = MOUNT,
> state =
> >>     >     FAILED, src =
> >>     >     >         >     /dev/mmcsd-0
> >>     >     >         >     >     > > media listener: event = PARTITION
> >>     INQUIRY,
> >>     >     state =
> >>     >     >         >     INQUIRY, src =
> >>     >     >         >     >     > > /dev/mmcsd-0
> >>     >     >         >     >     > > media listener: event = PARTITION
> >>     INQUIRY,
> >>     >     state =
> >>     >     >         >     SUCCESS, src =
> >>     >     >         >     >     > > /dev/mmcsd-0
> >>     >     >         >     >     > > media listener: event = PARTITION
> >>     ATTACH,
> >>     >     state
> >>     >     >         = INQUIRY,
> >>     >     >         >     src =
> >>     >     >         >     >     > > /dev/mmcsd-0
> >>     >     >         >     >     > > media listener: event = PARTITION
> >>     ATTACH,
> >>     >     state
> >>     >     >         = SUCCESS,
> >>     >     >         >     src =
> >>     >     >         >     >     > > /dev/mmcsd-0, dest = /dev/mmcsd-0-0
> >>     >     >         >     >     > > media listener: event = MOUNT,
> state =
> >>     >     INQUIRY,
> >>     >     >         src =
> >>     >     >         >     /dev/mmcsd-0-0
> >>     >     >         >     >     > > media listener: event = MOUNT,
> state =
> >>     >     SUCCESS,
> >>     >     >         src =
> >>     >     >         >     >     /dev/mmcsd-0-0,
> >>     >     >         >     >     > > dest = /media/mmcsd-0-0
> >>     >     >         >     >     > > media listener: event = DISK ATTACH,
> >>     state =
> >>     >     >         INQUIRY, src
> >>     >     >         >     = mmcsd
> >>     >     >         >     >     > > media listener: event = DISK ATTACH,
> >>     state =
> >>     >     >         SUCCESS, src =
> >>     >     >         >     >     mmcsd, dest
> >>     >     >         >     >     > > = /dev/mmcsd-1
> >>     >     >         >     >     > > media listener: event = MOUNT,
> state =
> >>     >     INQUIRY,
> >>     >     >         src =
> >>     >     >         >     /dev/mmcsd-1
> >>     >     >         >     >     > > mmcsd1: 4GB <MMCHC MMC04G 5.8 SN
> >>     160D224B MFG
> >>     >     >         09/2014 by 112
> >>     >     >         >     >     0x0000> at
> >>     >     >         >     >     > > mmc1 48.0MHz/8bit/65535-block
> >>     >     >         >     >     > > media listener: event = MOUNT,
> state =
> >>     >     FAILED, src =
> >>     >     >         >     /dev/mmcsd-1
> >>     >     >         >     >     > > media listener: event = PARTITION
> >>     INQUIRY,
> >>     >     state =
> >>     >     >         >     INQUIRY, src =
> >>     >     >         >     >     > > /dev/mmcsd-1
> >>     >     >         >     >     > > media listener: event = PARTITION
> >>     INQUIRY,
> >>     >     state
> >>     >     >         = FAILED,
> >>     >     >         >     src =
> >>     >     >         >     >     > > /dev/mmcsd-1
> >>     >     >         >     >     > > media listener: event = DISK ATTACH,
> >>     state =
> >>     >     >         INQUIRY, src =
> >>     >     >         >     >     mmcsd1boot
> >>     >     >         >     >     > > mmcsd1boot0: 2MB partion 1 at mmcsd1
> >>     >     >         >     >     > > mmcsd1boot1: 2MB partion 2 at mmcsd1
> >>     >     >         >     >     > > mmcsd1rpmb: 131kB partion 3 at
> mmcsd1
> >>     >     >         >     >     > >
> >>     >     >         >     >     > >
> >>     >     >         >     >     > > On 13/08/2019 13:30, Nils Hölscher
> >>     wrote:
> >>     >     >         >     >     > > > Hi,
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > > Thanks for the help.
> >>     >     >         >     >     > > > I tried to use your code, but I
> >>     always get
> >>     >     >         "ERROR: SD
> >>     >     >         >     could not be
> >>     >     >         >     >     > > > mounted after timeout".
> >>     >     >         >     >     > > > Even after raising the waiting
> time.
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > > The sources I use start here:
> >>     >     >         >     >     > > >
> >>     >     >         >
> >>     >     >
> >>     >
> >>
> https://github.com/nilhoel1/rtems-pru/blob/pruss-shell/main.c#L110
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > > And my uart output is:
> >>     >     >         >     >     > > > ""
> >>     >     >         >     >     > > > waiting for SD...
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > > usbus0: 480Mbps High Speed USB
> v2.0
> >>     >     >         >     >     > > > usbus1: 480Mbps High Speed USB
> v2.0
> >>     >     >         >     >     > > > media listener: event = DISK
> >>     ATTACH, state =
> >>     >     >         INQUIRY,
> >>     >     >         >     src = mmcsd
> >>     >     >         >     >     > > > media listener: event = DISK
> >>     ATTACH, state =
> >>     >     >         SUCCESS, src =
> >>     >     >         >     >     mmcsd, dest
> >>     >     >         >     >     > > > = /dev/mmcsd-0
> >>     >     >         >     >     > > > media listener: event = MOUNT,
> state =
> >>     >     >         INQUIRY, src =
> >>     >     >         >     /dev/mmcsd-0
> >>     >     >         >     >     > > > ugen0.1: <Mentor Graphics OTG Root
> >>     HUB>
> >>     >     at usbus0
> >>     >     >         >     >     > > > ugen1.1: <Mentor Graphics OTG Root
> >>     HUB>
> >>     >     at usbus1
> >>     >     >         >     >     > > > uhub0: <Mentor Graphics OTG Root
> >>     HUB, class
> >>     >     >         9/0, rev
> >>     >     >         >     >     2.00/1.00, addr 1>
> >>     >     >         >     >     > > > on usbus0
> >>     >     >         >     >     > > > uhub1: <Mentor Graphics OTG Root
> >>     HUB, class
> >>     >     >         9/0, rev
> >>     >     >         >     >     2.00/1.00, addr 1>
> >>     >     >         >     >     > > > on usbus1
> >>     >     >         >     >     > > > media listener: event = MOUNT,
> state =
> >>     >     FAILED,
> >>     >     >         src =
> >>     >     >         >     /dev/mmcsd-0
> >>     >     >         >     >     > > > media listener: event = PARTITION
> >>     >     INQUIRY, state =
> >>     >     >         >     INQUIRY, src =
> >>     >     >         >     >     > > > /dev/mmcsd-0
> >>     >     >         >     >     > > > media listener: event = PARTITION
> >>     >     INQUIRY, state =
> >>     >     >         >     SUCCESS, src =
> >>     >     >         >     >     > > > /dev/mmcsd-0
> >>     >     >         >     >     > > > media listener: event = PARTITION
> >>     >     ATTACH, state =
> >>     >     >         >     INQUIRY, src =
> >>     >     >         >     >     > > > /dev/mmcsd-0
> >>     >     >         >     >     > > > media listener: event = PARTITION
> >>     >     ATTACH, state =
> >>     >     >         >     SUCCESS, src =
> >>     >     >         >     >     > > > /dev/mmcsd-0, dest =
> /dev/mmcsd-0-0
> >>     >     >         >     >     > > > media listener: event = MOUNT,
> state =
> >>     >     >         INQUIRY, src =
> >>     >     >         >     >     /dev/mmcsd-0-0
> >>     >     >         >     >     > > > media listener: event = MOUNT,
> state =
> >>     >     FAILED,
> >>     >     >         src =
> >>     >     >         >     >     /dev/mmcsd-0-0
> >>     >     >         >     >     > > > media listener: event = DISK
> >>     ATTACH, state =
> >>     >     >         INQUIRY,
> >>     >     >         >     src = mmcsd
> >>     >     >         >     >     > > > media listener: event = DISK
> >>     ATTACH, state =
> >>     >     >         SUCCESS, src =
> >>     >     >         >     >     mmcsd, dest
> >>     >     >         >     >     > > > = /dev/mmcsd-1
> >>     >     >         >     >     > > > media listener: event = MOUNT,
> state =
> >>     >     >         INQUIRY, src =
> >>     >     >         >     /dev/mmcsd-1
> >>     >     >         >     >     > > > media listener: event = MOUNT,
> state =
> >>     >     FAILED,
> >>     >     >         src =
> >>     >     >         >     /dev/mmcsd-1
> >>     >     >         >     >     > > > media listener: event = PARTITION
> >>     >     INQUIRY, state =
> >>     >     >         >     INQUIRY, src =
> >>     >     >         >     >     > > > /dev/mmcsd-1
> >>     >     >         >     >     > > > media listener: event = PARTITION
> >>     >     INQUIRY, state =
> >>     >     >         >     SUCCESS, src =
> >>     >     >         >     >     > > > /dev/mmcsd-1
> >>     >     >         >     >     > > > media listener: event = PARTITION
> >>     >     ATTACH, state =
> >>     >     >         >     INQUIRY, src =
> >>     >     >         >     >     > > > /dev/mmcsd-1
> >>     >     >         >     >     > > > media listener: event = PARTITION
> >>     >     ATTACH, state =
> >>     >     >         >     SUCCESS, src =
> >>     >     >         >     >     > > > /dev/mmcsd-1, dest =
> /dev/mmcsd-1-0
> >>     >     >         >     >     > > > media listener: event = MOUNT,
> state =
> >>     >     >         INQUIRY, src =
> >>     >     >         >     >     /dev/mmcsd-1-0
> >>     >     >         >     >     > > > media listener: event = MOUNT,
> state =
> >>     >     FAILED,
> >>     >     >         src =
> >>     >     >         >     >     /dev/mmcsd-1-0
> >>     >     >         >     >     > > > media listener: event = DISK
> >>     ATTACH, state =
> >>     >     >         INQUIRY, src =
> >>     >     >         >     >     mmcsd1boot
> >>     >     >         >     >     > > > uhub0: 1 port with 1 removable,
> >>     self powered
> >>     >     >         >     >     > > > uhub1: 1 port with 1 removable,
> >>     self powered
> >>     >     >         >     >     > > > ERROR: SD could not be mounted
> >>     after timeout
> >>     >     >         >     >     > > > ""
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > > Thanks,
> >>     >     >         >     >     > > > Nils
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > > On Mon, 12 Aug 2019 at 18:01,
> >>     Christian
> >>     >     Mauderer
> >>     >     >         >     >     <list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> >>     >     >         <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>
> >>     >     >         >     <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> >>     >     >         <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>>
> >>     >     >         >     >     > > > <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     >     >         <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>>>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     >     >         <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>>>>
> >>     >     >         >     <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> >>     >     >         <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> >>     <mailto:list at c-mauderer.de>>
> >>     >     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> >>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>>>> wrote:
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >     On 12/08/2019 07:28, Nils
> Hölscher
> >>     >     wrote:
> >>     >     >         >     >     > > >     > Hi,
> >>     >     >         >     >     > > >     >
> >>     >     >         >     >     > > >     > Can anyone help me with
> this?
> >>     >     >         >     >     > > >     > I need to access the BBB's
> >>     SD-Card, so
> >>     >     >         that I can load
> >>     >     >         >     >     my pru
> >>     >     >         >     >     > > >     example on
> >>     >     >         >     >     > > >     > the pru.
> >>     >     >         >     >     > > >     >
> >>     >     >         >     >     > > >     > Thanks,
> >>     >     >         >     >     > > >     > Nils
> >>     >     >         >     >     > > >     >
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >     Hello Nils,
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >     take a look at the following
> >>     >     application:
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >
> >>     >     >         >     >
> >>     >     >         >
> >>     >     >
> >>     >
> >>
> https://gitlab.com/c-mauderer/rtems-bbb/blob/master/apps/wifi-sample/init.c#L64
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >
> >>     >     >         >     >
> >>     >     >         >
> >>     >     >
> >>     >
> >>
> https://gitlab.com/c-mauderer/rtems-bbb/blob/master/apps/wifi-sample/libbsdhelper.c#L122
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >     You should mainly need the
> stuff
> >>     >     from the
> >>     >     >         >     >     libbsdhelper_init_sd_card()
> >>     >     >         >     >     > > >     and
> libbsdhelper_wait_for_sd().
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >     Please note that the SD card
> >>     needs quite
> >>     >     >         some time to
> >>     >     >         >     >     initialize on BBB.
> >>     >     >         >     >     > > >     I haven't had a look at it why
> >>     that
> >>     >     is the
> >>     >     >         case.
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >     Best regards
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >     Christian
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > > >
> >>     >     _______________________________________________
> >>     >     >         >     >     > > > users mailing list
> >>     >     >         >     >     > > > users at rtems.org
> >>     <mailto:users at rtems.org> <mailto:users at rtems.org
> >>     <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>
> >>     >     >         <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>>
> >>     >     >         >     <mailto:users at rtems.org
> >>     <mailto:users at rtems.org> <mailto:users at rtems.org
> >>     <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>
> >>     >     >         <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>>>
> >>     >     >         >     >     > > >
> >>     >     http://lists.rtems.org/mailman/listinfo/users
> >>     >     >         >     >     > > >
> >>     >     >         >     >     > >
> >>     >     _______________________________________________
> >>     >     >         >     >     > > users mailing list
> >>     >     >         >     >     > > users at rtems.org
> >>     <mailto:users at rtems.org> <mailto:users at rtems.org
> >>     <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>
> >>     >     >         <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>>
> >>     >     >         >     <mailto:users at rtems.org
> >>     <mailto:users at rtems.org> <mailto:users at rtems.org
> >>     <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>
> >>     >     >         <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>>>
> >>     >     >         >     >     > >
> >>     http://lists.rtems.org/mailman/listinfo/users
> >>     >     >         >     >     >
> >>     >     >         >     >
> >>     >     >         >     >     --
> >>     >     >         >     >     --
> >>     >     >         >     >
>  --------------------------------------------
> >>     >     >         >     >     embedded brains GmbH
> >>     >     >         >     >     Herr Christian Mauderer
> >>     >     >         >     >     Dornierstr. 4
> >>     >     >         >     >     D-82178 Puchheim
> >>     >     >         >     >     Germany
> >>     >     >         >     >     email:
> >>     christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>
> >>     >     >         <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>>
> >>     >     >         >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>
> >>     >     >         <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>>>
> >>     >     >         >     >
> >>      <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>
> >>     >     >         <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>>
> >>     >     >         >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>
> >>     >     >         <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>
> >>     >     <mailto:christian.mauderer at embedded-brains.de
> >>     <mailto:christian.mauderer at embedded-brains.de>>>>>
> >>     >     >         >     >     Phone: +49-89-18 94 741 - 18
> >>     >     >         >     >     Fax:   +49-89-18 94 741 - 08
> >>     >     >         >     >     PGP: Public key available on request.
> >>     >     >         >     >
> >>     >     >         >     >     Diese Nachricht ist keine geschäftliche
> >>     Mitteilung
> >>     >     >         im Sinne
> >>     >     >         >     des EHUG.
> >>     >     >         >     >
> >>     >     >         >     >
> >>     >     >         >     >
> _______________________________________________
> >>     >     >         >     > users mailing list
> >>     >     >         >     > users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>
> >>     >     >         <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>
> >>     >     <mailto:users at rtems.org <mailto:users at rtems.org>
> >>     <mailto:users at rtems.org <mailto:users at rtems.org>>>>
> >>     >     >         >     >
> http://lists.rtems.org/mailman/listinfo/users
> >>     >     >         >     >
> >>     >     >         >
> >>     >     >
> >>     >
> >>
> > _______________________________________________
> > devel mailing list
> > devel at rtems.org
> > http://lists.rtems.org/mailman/listinfo/devel
> >
>
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