Mounting/Accessing SD-Card on BBB

Nils Hölscher nilhoel1 at gmail.com
Tue Aug 13 15:46:38 UTC 2019 

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> 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>
> 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>> 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
> > > http://lists.rtems.org/mailman/listinfo/users
> > >
> > _______________________________________________
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> > http://lists.rtems.org/mailman/listinfo/users
>
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