[beagleboard] Re: Systemd configuring /dev/gps0 for ntpd

[David M.]

OK, there are several points I can bring up.  The Before and After clauses 
in a systemd unit file only affect the ordering of unit files and not the 
dependency.  For a dependency, you will want either *wants* or *requires* to 
specify a dependency.  The requires clause is a hard dependency (the unit 
file or device must exist and must run), while the wants clause does not 
require the unit file or device, but will bring it in if it exists.  This 
is my main ntpd.service file:

[Unit]
Description=Network Time Service daemon
After=init-gps.service
After=dev-gps0.device
Requires=dev-gps0.device
Wants=init-gps.service

[Service]
Type=simple
ExecStart=/usr/local/bin/ntpd -Nng
[Install]
WantedBy=multi-user.target

You can see that it has a hard dependency on dev-gps0.device.  No 
device, and NTPd will not run. 

On my device, init-gps.service is just a wrapper to a shell script that 
sends commands to the GPS serial port;  I'm not using it at the moment, so 
it is just listed as a want--not a hard dependency.

The other part is in /etc/udev/rules.d/10-gps.rules and is probably similar 
to your rule except for one item:

SUBSYSTEM=="tty", KERNEL=="ttyO1", NAME="ttyO1", SYMLINK="gps0",
*TAG="systemd"*

The TAG specification is very important and indicates that systemd needs to 
know about your device.  

When implemented properly, your NTPd unit file will wait on the device 
until the symlink is created.  Then NTP will be started.  I recommend not 
forking NTPd -- the startup options I have listed, -Nng (don't fork, 
highest priority, no limits on initial time skew), appear to be the most 
optimal.  I don't presently use ntpdate to "presync" the device.  

With a standby battery on my device (powering an RTC and the GPS), I can 
attain a reboot cycle of less than a minute from U-boot startup until NTPd 
starts and acquires the GPS.  I haven't yet optimized it, but I am very 
happy with my results so far.

(BTW, this has nothing whatsoever to do with the GPS constellation, etc.  
It should be a use-case that my (our) NTP device should be able to come up 
from a cold start with no fix and start talking with NTPd, whereas it will 
wait for a fix and choose other peers while it is doing so.)

This is my finished clock, known as BB-NTPd. 

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Re: [beagleboard] Systemd configuring /dev/gps0 for ntpd

[David M.]

On Monday, February 3, 2014 1:57:17 PM UTC-5, john3909 wrote:
>
>
>
>
>
> Is it possible GPS has to acquire satellites before /dev/gps0 is created?
>

No.  The /dev/gps0 is just a plain alias to /dev/ttyO1 (or O2, etc.)  NTPd 
can and does access the serial interface irregardless of the state of the 
GPS.



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[beagleboard] Re: BBB and HDMI to VGA adapter: the monitor goes in standby after few seconds.

[doog]

I was incorrect in stating that the "video=" option of optargs in xInit.txt 
would effect runtime video resolution. It will only effect the boot time 
resolution and that seems ok since you see the initial boot logo.

I would still check the /var/log/Xorg.0.log file for what the current 
resolution is and if that is beyond what your display can handle. 
You might also want to look at this:
http://elinux.org/Beagleboard:BeagleBoneBlack_HDMI#Forcing_A_Resolution

Doug

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[beagleboard] Re: I can't make BBB rev A5C & LCD7 Cape rev 3 work together :-(

[Brian Yee]

Manuel,

I ran into the same problem with my A5A's.  I finally ordered some BBB 
boards from Arrow and received A6A versions, those worked fine,
except the touch screen was jittery and overly sensitive.  Plugging in a 
USB mouse solved the jittery cursor at the expense of
the loss of the touch screen.  The 7" displays worked, but the 4.3" did not.

Brian


On Saturday, February 1, 2014 10:28:41 AM UTC-8, DoctorP wrote:
>
> Hi,
> i'm the newest newbie of all, and I'm having a problem that I can't fix. I 
> will try to be as specific as I can: 
>
> I have to confess that I don't know a word of linux, apart from ls, cd and 
> these kind of commands...  
>
> I've bought 4 BBB's recently, that are marked as Rev A5C, and 4 LCD7 
> capes, being rev A3. reading the documentation of the LCD cape, it says 
> that i need to update the software of the board. After many tries and 
> falls, i'v managed to change the firmware in the eMMc to "Cloud9 GNOME 
> Image 2013.09.04", available on http://beagleboard.org/latest-images. The 
> board is working properly, as far as I can say: it boots, and I can access 
> thru ssh and see the contents of the flash or execute the 
> Cloud9 environment. 
> But I haven't been able to connect successfully the lcd cape. Somentimes, 
> it seems to boot, and even shows the calibration screen, but then it 
> freezes, most of the times with a blinking cursor on the top of the screen. 
> Another awkward behavior is that sometimes (can't remember with which 
> software version was) it had booted properly and showed the Desktop, and i 
> have run applications in graphic mode.
>
> Attending to http://www.elinux.org/BeagleBone_Black_Capes , there 
> shouldn't be compatibility issues between these two boards, so I'm totally 
> depressed.
>
> Reading the posts on this group, all of you seem to be experts on 
> compiling, installing and doing awesome things with BBB's.  
>
> So I'm begging any help. No one have had this problem? Could anyone show 
> me some light? I might remember that i have a deep unknowing of linux, 
> kernels, makes and so on. Also, I don't have the ftdi serial cable 
> (although i could build one).  
>
> Thanks in advance,
> Manuel P.
>
>
>

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[beagleboard] LWJGL

[Joey Carlini]

Still chasing that white whale of running Minecraft on an BBB, I eventually 
came to the conclusion that the major issue was twofold. First, Minecraft 
has a dependency on the Lightweight Java Games Library, or LWJGL, and it 
does not have an ARM version to reference when it's downloading the run 
environment. Second, Minecraft's launcher doesn't allow you to reference 
specific jars in the boot up process, meaning that any version of LWJGL and 
it's accessories that could be ported to ARM would also have to pass the 
sha checks. Granted, those could be fudged, but I'm at a bit of a loss on 
how to proceed since I seem to be in uncharted territory. Anyone have any 
pieces of advice or suggestions on where to go from here? 

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[beagleboard] Slave USB Port of BBB

[vsingh . usa]

Need tp create custom USB driver for ARM Slave USB port. So when i connect 
to PC it should be mapped as composite device which is mass storage +  
custom device.

How can i modify USB descriptor of BBB device. Please help. Consider my 
knowledge of USB intermediate. In past Developed USB firmware/USB Driver/PC 
App (using USB) for Linux and Windows.


Have created custom USB firmware but never faced a situation where i had to 
to in Linux kernel to modify slave device.

Appreciate you for reading this post and will be thankful for help.

Thanks

Vijay

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Re: [beagleboard] Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches

[Charles Steinkuehler]

On 2/3/2014 11:30 AM, David Lewin wrote:
> *You can use the Xenomai kernel with any of the Debian images from RCN,just
> install to the eMMC then update the kernel*
> Whereas I m quite ok with the use of Xenomai, I'm not really at ease with
> the way to build it, the
> Readme
> is
> clear but some steps are missings for me.

There's not much to building the user-space Xenomai tools from scratch,
either follow along with the Xenomai instructions, or you can refer to
the scripts that get run when I build my images:

https://github.com/cdsteinkuehler/omap-image-builder/blob/MachineKit/machinekit/scripts/003.make-xenomai.shu

https://github.com/cdsteinkuehler/omap-image-builder/blob/MachineKit/machinekit/scripts/004.make-xenomai.shr

The *.shu script is run as a normal user (linuxcnc), and the *.shr
script is run as root.

You can do this on your preferred version of Debian/Ubuntu running out
of the eMMC (just grab one of RCN's eMMC flasher images).  That and
swapping out the kernel gets you a working Xenomai system.  Anything
else you need you should be able to pull in with a simple "aptitude
install whatever".

-- 
Charles Steinkuehler
char...@steinkuehler.net

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Re: [beagleboard] I can't make BBB rev A5C & LCD7 Cape rev 3 work together :-(

[Hieu Duong]

Manuel,

It sounds like your LCD7 Cape may have issue with the signal integrity when
booting with BBB: http://elinux.org/CircuitCo:BeagleBone_LCD7#Known_Issues

Have you tried booting up your LCD7 + BBB setup from a bootable SD card?
The process of creating this type of SD is similar; however, instead of
flashing the eMMC on BBB, it will allow you to boot directly from the BBB's
micro SD card slot:
http://elinux.org/Beagleboard:Updating_The_Software#Image_For_Booting_From_microSD


~Hieu



On Sat, Feb 1, 2014 at 12:28 PM, DoctorP  wrote:

> Hi,
> i'm the newest newbie of all, and I'm having a problem that I can't fix. I
> will try to be as specific as I can:
>
> I have to confess that I don't know a word of linux, apart from ls, cd and
> these kind of commands...
>
> I've bought 4 BBB's recently, that are marked as Rev A5C, and 4 LCD7
> capes, being rev A3. reading the documentation of the LCD cape, it says
> that i need to update the software of the board. After many tries and
> falls, i'v managed to change the firmware in the eMMc to "Cloud9 GNOME
> Image 2013.09.04", available on http://beagleboard.org/latest-images. The
> board is working properly, as far as I can say: it boots, and I can access
> thru ssh and see the contents of the flash or execute the
> Cloud9 environment.
> But I haven't been able to connect successfully the lcd cape. Somentimes,
> it seems to boot, and even shows the calibration screen, but then it
> freezes, most of the times with a blinking cursor on the top of the screen.
> Another awkward behavior is that sometimes (can't remember with which
> software version was) it had booted properly and showed the Desktop, and i
> have run applications in graphic mode.
>
> Attending to http://www.elinux.org/BeagleBone_Black_Capes , there
> shouldn't be compatibility issues between these two boards, so I'm totally
> depressed.
>
> Reading the posts on this group, all of you seem to be experts on
> compiling, installing and doing awesome things with BBB's.
>
> So I'm begging any help. No one have had this problem? Could anyone show
> me some light? I might remember that i have a deep unknowing of linux,
> kernels, makes and so on. Also, I don't have the ftdi serial cable
> (although i could build one).
>
> Thanks in advance,
> Manuel P.
>
>
>  --
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>

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[beagleboard] Re: BBB and HDMI to VGA adapter: the monitor goes in standby after few seconds.

[doog]

have you ssh'ed into the BBB and check the X.log.0 file to determine what 
resolution it might be running at?
Just a guess but maybe there's a mismatch between what the BBB is driving 
and what the VGA display can show. If that's the case, then you might try 
setting the video mode on the kernel options line in xInit.txt.

Doug

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[beagleboard] Re: Suspected HW issue with Beaglebone Black

[AndrewTaneGlen]

Try with a different software package, e.g. 
http://elinux.org/BeagleBoardUbuntu (I'd highly recommend using this over 
Angstrom in any case) If you have similar problems it might help point to a 
HW issue.

On Monday, 3 February 2014 08:04:23 UTC+13, Vladimir B wrote:
>
> Hi All,
>
> I am trying to rule out SW issues with my BBB (HW Rev A5C) running 
> Angstrom.  First I am going to give a bit of background on when the issues 
> started and then provide dumps of crashed as seen via UART.
>
>
>
>1. BBB was working fine for quite some time.  
>2. Then I tried to switch from wired ethernet to wireless by plugging 
>in UWN200 (
>http://www.logicsupply.com/components/networking/wireless/uwn200/) 
>while BBB was powered by DC adapter. 
>3. My SSH over wired Ethernet froze.  
>4. I removed the UWN200 and rebooted a device but could not longer 
>connect via SSH with wired ethernet
>5. Connecting via USB (client) I could not get network connection 
>to 192.168.7.2 either.  As I realized later I did not even have usb0 
> listed 
>when running ifconfig
>6. At this point I connected via UART
>7. I could see that the kernel was crashing with NULL pointer 
>dereference Oops
>8. Every few restarts it would get past this oops
>9. I shutdown BBB and looked to upgrade to latest Angstrom a few days 
>later, thinking maybe I am just a lucky one to hit a real bug in the kernel
>10. I downloaded the following image 
>
> https://s3.amazonaws.com/angstrom/demo/beaglebone/BBB-eMMC-flasher-2013.09.04.img.xzinto
>  SD card
>11. BBB was booted from SD by holding the boot button.
>12. Flashing process was problematic, it took a few reboots (about) 
>from SD card for eMMC flashing to complete (4 solid LEDs) without kernel 
>Oopsing
>   - One of the Oopses was odd as it was for "invalid instruction"
>
>
> To me this feels like a HW problem due to failures manifesting themselves 
> in different ways. Segfaults in the apps, NULL pointer dereferences in the 
> kernel, Soft CPU lockups.  But I would like to rule out a user error.
>
> Few observations:
>
>- I have run mtest from uboot without any errors being detected
>- Same for memtester
>- Pressing rest button does not always reboot the device. Sometimes 
>holding power button down is the only way to reboot the BBB. But sometimes 
>it works just fine.
>- For a few reboots accessing BBB via HTTP would causes kernel Oopses. 
> Trying it out just now and it worked just fine
>
>
> The below is done post flashing to the latest angstrom:
>
>- systemd once segfaulted during boot: http://pastebin.com/YFuxNs8e
>- some times system boots just fine: http://pastebin.com/7HynL8H7
>- "opkg upgrade" consistently segfaults
>- "opkg install strace" consistently segfaults
>
>
> Any suggestions on what I can do to narrow down the root cause of the 
> issue would be greatly appreciated.
>
> Thank you,
>
> Vladimir
>

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Re: [beagleboard] Systemd configuring /dev/gps0 for ntpd

[John Syn]

From:  Neil Cobbett 
Reply-To:  
Date:  Sunday, February 2, 2014 at 8:17 PM
To:  
Subject:  [beagleboard] Systemd configuring /dev/gps0 for ntpd

> Hi,
> 
> I am using BBB with a GPS to get system time into NTP using the NMEA string.
> I've done this a few times before.
> I have no network connection for ntpd.  (It works if I have a network
> connection but NOT with /dev/gps0 as the only time server)
> 
> The problem:  
> I map /dev/ttyO1 to /dev/gps0 as a rule in /etc/udev/rules.d
> 
> systemd boots as usual and when ntpdate.service executes /dev/gps0 still isn't
> ready so NTPd fails and hangs since it can't find a time server.
> I end up manually having to kill ntpd and restart the ntpdate service again
> 
> I have managed to force it to work by disabling ntpdate.service and
> ntpd.service in systemd and instead use CRON to call ntpd 30 seconds after
> boot with a 'sleep 30'.  A rubbish solution I know!
> But it does highlight the fact that NTPd should not run before /dev/gps0
> exists if NTP is to work properly.
> 
> My questions -  
> 
> 1.  How do I get ntpdate.service to only run when /dev/gps0 already exists?
> i.e. wait until /dev/gps0 is streaming NMEA data.
> 
> I have tried a number of 'Before' and 'After' commands  in
> /lib/system/systemd/ntpdate.service with no apparent change.
> 
> 
> 2.  Why is the creation of /dev/gps0 taking so long?  udev seems to be
> configuring this rule very slowly.  It's only a serial port mapping so why
> take 10's of seconds?
Is it possible GPS has to acquire satellites before /dev/gps0 is created?
> 
> Any help greatly appreciated!
> Neil 
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[beagleboard] BBB and HDMI to VGA adapter: the monitor goes in standby after few seconds.

[guerreski]

Hi all,

first I have to say that I searched long about this argument: there are 
many posts about it, but still it is confusing to me! :(

I bought an HDMI to VGA adapter that it is internally powered with micro 
USB. This is needed because the BBB cannot provide the required current.

When I power up the BBB I can see the Beaglebone logo: that means to me 
that the connection is fine, but after few seconds the image disappear and 
the monitor goes in standby. I tried with different VGA monitors and the 
behaviour is the same.

I cannot figure out how to solve this problem, someone has found a solution?

Thank you very much,

Alessandro

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Re: [beagleboard] Todays summary links are dead

[Gerald Coley]

I would say ask Google.

Gerald



On Mon, Feb 3, 2014 at 12:25 PM, Perry Chamberlain <
perry.chamberl...@gmail.com> wrote:

> Just noticed all links in summary are dead links, whats up.
>
> Canoeman
>
>
>
> On Monday, February 3, 2014,  wrote:
> >   Today's Topic Summary
> >
> > Group: http://groups.google.com/group/beagleboard/topics
> >
> > PWM Subsystem Time Base input clock frequency? [3
> > debian: test images (2014-01-22) [2 Updates]
> > How to get serial debug information in Beaglebone black [1 Update]
> > Audio Cape with Beaglebone Black [1 Update]
> > http://192.168.7.2 not connecting [1 Update]
> > Android running on BBB with Linux 3.8 [1 Update]
> > Systemd configuring /dev/gps0 for ntpd [1 Update]
> > Unable to SSH to Beagle Bone Black [1 Update]
> > Beagleboard xM - Angstrom cannot 'opkg update' ::: config files for OPKG
> are wrong [1 Update]
> > BBB kernel 3.13 & Xenomai - 2nd approach [1 Update]
> > Accessing GPIOs in userspace, kernel 3.8.13 [1 Update]
> > Suspected HW issue with Beaglebone Black [1 Update]
> > Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches [1 Update]
> > BEAGLEBONE BLACK Device tree overlay changing parameters not affecting
> [1 Update]
> > BeagleBone Black Multiple Codecs (two TLV320AIC3106) [1 Update]
> > Any library available for the BBB, to use MPU-6050 and ADXL335 ? [1
> Update]
> > I can't make BBB rev A5C & LCD7 Cape rev 3 work together :-( [1 Update]
> > Super tiny window manager for Debian [1 Update]
> > New board, sdcard holder broke [1 Update]
> > ssh [1 Update]
> > EEPROM ID layout for baseboard [1 Update]
> > Register Alsa ASOC wm8782 driver [1 Update]
> > BeagleBone Power switch problems. [1 Update]
> > No GUI on beaglebone debian? [2 Updates]
> > Not able to ping through Beaglebone Black on laptop [1 Update]
> > BBB Ubuntu Raring: FFMPEG / OpenCV [3 Updates]
> > what's your smallest flash memory card? [1 Update]
> > Can't get BeagleSNES to work on BBB [1 Update]
> > Wifi wpa2-psk configuration [2 Updates]
> > Awkward booting problem with the BBB [5 Updates]
> >
> >  PWM Subsystem Time Base input clock frequency?
> >
> > robjsstew...@gmail.com Feb 01 04:57AM -0800
> >
> > On Friday, January 31, 2014 5:57:32 PM UTC-5, Charles Steinkuehler wrote:
> >
> >> --
> >
> >> Charles Steinkuehler
> >
> >> char...@steinkuehler.net
> >
> > Thanks for the reply, Charles. That makes sense.
> > ...more
> >
> > Back to top
> >
> > robjsstew...@gmail.com Feb 02 08:34AM -0800
> >
> > CPU Friday, January 31, 2014 5:57:32 PM UTC-5, Charles Steinkuehler
> wrote:
> >
> >> --
> >
> >> Charles Steinkuehler
> >
> >> char...@steinkuehler.net
> >
> >
> >
> > On Friday, January 31, 2014 5:57:32 PM UTC-5, Charles ...more
> >
> > Back to top
> >
> > Charles Steinkuehler  Feb 03 07:49AM -0600
> >
> >> system clock" SYSCLKOUT as the source clock for the submodule. I'll
> >> use your information in my driver and test it with the hardware next
> >> week.
> >
> > Yes, it can be quite confusing.
> > ...more
> >
> > Back to top
> >
> >  debian: test images (2014-01-22)
> >
> > anithamol.be...@vvdntech.com Feb 03 02:03AM -0800
> >
> > Hi Robert,
> > Thank you very much. ' Radium Boards' are really happy
> > for your feedback on our cape.
> > We have gstreamer support for Angstrom release.We will ...more
> >
> > Back to top
> >
> > Robert Nelson  Feb 03 07:39AM -0600
> >
> >> for your feedback on our cape.
> >> We have gstreamer support for Angstrom release.We will
> >> provide you for debian also in shell script if necessary.
> >
> > A shell script would be ...more
> >
> > Back to top
> >
> >  How to get serial debug information in Beaglebone black
> >
> > kumar.ankit...@gmail.com Feb 02 08:21PM -0800
> >
> > Hello ,
> >
> > I purchased the ttl to usb convertor and connected with board but
> > it is not getting boot up .kindly suggest where i am going wrng.
> > For making kernel image ,rootfs , ...more
> >
> > Back to top
> >
> >  Audio Cape with Beaglebone Black
> >
> > r...@igong.co Feb 03 03:29AM -0800
> >
> > For anybody like me, vaguely understanding what's going on, and ending up
> > here: I built 3.8.13-bone39 from Robert Nelsons github site. A slightly
> > modified version of cody's patch above is already ...more
> >
> > Back to top
> >
> >  http://192.168.7.2 not connecting
> >
> > ravindran@gmail.com Feb 03 01:58AM -0800
> >
> > Hi,
> > we got a new beagle bone black hardware. currently i am trying to do the
> > startup work.
> >
> > I connected the BB in windows XP environment PC using the USB cable.
> After
> > booting, i can see the BB ...more
> >
> > Back to top
> >
> >  Android running on BBB with Linux 3.8
> >
> > pru.p...@gmail.com Feb 03 01:45AM -0800
> >
> > On Sunday, July 7, 2013 4:09:26 AM UTC+2, Andrew Henderson wrote:
> >
> >> [...]
> >
> > Try testing it out with a USB mouse and making sure that it looks and
> acts
> >> like what you would expect. ...more
> >
> > Back to top
> >
> >  Systemd configuring /dev/gps0 for ntpd
> >
> > Neil Cobbett  Feb 02 08:17P

[beagleboard] Todays summary links are dead

[Perry Chamberlain]

Just noticed all links in summary are dead links, whats up.

Canoeman



On Monday, February 3, 2014,  wrote:
>   Today's Topic Summary
>
> Group: http://groups.google.com/group/beagleboard/topics
>
> PWM Subsystem Time Base input clock frequency? [3
> debian: test images (2014-01-22) [2 Updates]
> How to get serial debug information in Beaglebone black [1 Update]
> Audio Cape with Beaglebone Black [1 Update]
> http://192.168.7.2 not connecting [1 Update]
> Android running on BBB with Linux 3.8 [1 Update]
> Systemd configuring /dev/gps0 for ntpd [1 Update]
> Unable to SSH to Beagle Bone Black [1 Update]
> Beagleboard xM - Angstrom cannot 'opkg update' ::: config files for OPKG
are wrong [1 Update]
> BBB kernel 3.13 & Xenomai - 2nd approach [1 Update]
> Accessing GPIOs in userspace, kernel 3.8.13 [1 Update]
> Suspected HW issue with Beaglebone Black [1 Update]
> Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches [1 Update]
> BEAGLEBONE BLACK Device tree overlay changing parameters not affecting [1
Update]
> BeagleBone Black Multiple Codecs (two TLV320AIC3106) [1 Update]
> Any library available for the BBB, to use MPU-6050 and ADXL335 ? [1
Update]
> I can't make BBB rev A5C & LCD7 Cape rev 3 work together :-( [1 Update]
> Super tiny window manager for Debian [1 Update]
> New board, sdcard holder broke [1 Update]
> ssh [1 Update]
> EEPROM ID layout for baseboard [1 Update]
> Register Alsa ASOC wm8782 driver [1 Update]
> BeagleBone Power switch problems. [1 Update]
> No GUI on beaglebone debian? [2 Updates]
> Not able to ping through Beaglebone Black on laptop [1 Update]
> BBB Ubuntu Raring: FFMPEG / OpenCV [3 Updates]
> what's your smallest flash memory card? [1 Update]
> Can't get BeagleSNES to work on BBB [1 Update]
> Wifi wpa2-psk configuration [2 Updates]
> Awkward booting problem with the BBB [5 Updates]
>
>  PWM Subsystem Time Base input clock frequency?
>
> robjsstew...@gmail.com Feb 01 04:57AM -0800
>
> On Friday, January 31, 2014 5:57:32 PM UTC-5, Charles Steinkuehler wrote:
>
>> --
>
>> Charles Steinkuehler
>
>> char...@steinkuehler.net
>
> Thanks for the reply, Charles. That makes sense.
> ...more
>
> Back to top
>
> robjsstew...@gmail.com Feb 02 08:34AM -0800
>
> CPU Friday, January 31, 2014 5:57:32 PM UTC-5, Charles Steinkuehler wrote:
>
>> --
>
>> Charles Steinkuehler
>
>> char...@steinkuehler.net
>
>
>
> On Friday, January 31, 2014 5:57:32 PM UTC-5, Charles ...more
>
> Back to top
>
> Charles Steinkuehler  Feb 03 07:49AM -0600
>
>> system clock" SYSCLKOUT as the source clock for the submodule. I'll
>> use your information in my driver and test it with the hardware next
>> week.
>
> Yes, it can be quite confusing.
> ...more
>
> Back to top
>
>  debian: test images (2014-01-22)
>
> anithamol.be...@vvdntech.com Feb 03 02:03AM -0800
>
> Hi Robert,
> Thank you very much. ' Radium Boards' are really happy
> for your feedback on our cape.
> We have gstreamer support for Angstrom release.We will ...more
>
> Back to top
>
> Robert Nelson  Feb 03 07:39AM -0600
>
>> for your feedback on our cape.
>> We have gstreamer support for Angstrom release.We will
>> provide you for debian also in shell script if necessary.
>
> A shell script would be ...more
>
> Back to top
>
>  How to get serial debug information in Beaglebone black
>
> kumar.ankit...@gmail.com Feb 02 08:21PM -0800
>
> Hello ,
>
> I purchased the ttl to usb convertor and connected with board but
> it is not getting boot up .kindly suggest where i am going wrng.
> For making kernel image ,rootfs , ...more
>
> Back to top
>
>  Audio Cape with Beaglebone Black
>
> r...@igong.co Feb 03 03:29AM -0800
>
> For anybody like me, vaguely understanding what's going on, and ending up
> here: I built 3.8.13-bone39 from Robert Nelsons github site. A slightly
> modified version of cody's patch above is already ...more
>
> Back to top
>
>  http://192.168.7.2 not connecting
>
> ravindran@gmail.com Feb 03 01:58AM -0800
>
> Hi,
> we got a new beagle bone black hardware. currently i am trying to do the
> startup work.
>
> I connected the BB in windows XP environment PC using the USB cable. After
> booting, i can see the BB ...more
>
> Back to top
>
>  Android running on BBB with Linux 3.8
>
> pru.p...@gmail.com Feb 03 01:45AM -0800
>
> On Sunday, July 7, 2013 4:09:26 AM UTC+2, Andrew Henderson wrote:
>
>> [...]
>
> Try testing it out with a USB mouse and making sure that it looks and acts
>> like what you would expect. ...more
>
> Back to top
>
>  Systemd configuring /dev/gps0 for ntpd
>
> Neil Cobbett  Feb 02 08:17PM -0800
>
> Hi,
>
> I am using BBB with a GPS to get system time into NTP using the NMEA
> string. I've done this a few times before.
> I have no network connection for ntpd. (It works if I have a network
...more
>
> Back to top
>
>  Unable to SSH to Beagle Bone Black
>
> andy.w.erick...@gmail.com Feb 02 06:33PM -0800
>
> I was having this same problem and this solved it perfectly. Thank you
> Jimmy!
>
>
>
> -Andy
>
> ...more
>
> Back to top
>
>

Re: [beagleboard] Beagleboard xM - Angstrom cannot 'opkg update' ::: config files for OPKG are wrong

[Perry Chamberlain]

If it isn't dead, it should be.
After it bricked the bbb, after doing update,upgrade, I'm working to find an 
image of a useable version of Ubuntu.
Is there a way to run directly from the sd card, so we can load the full ubuntu 
image, on a huge sd card.
And simply pull the sd card to have it revert to Angstrom.

Canoeman

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Re: [beagleboard] Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches

[David Lewin]

*You can use the Xenomai kernel with any of the Debian images from RCN,just
install to the eMMC then update the kernel*
Whereas I m quite ok with the use of Xenomai, I'm not really at ease with
the way to build it, the
Readme
is
clear but some steps are missings for me.

*You can get a much lighter-weight system running Xenomai if that's all you
are interested in*
Exactly my purpose,  I'll stay in user space (no RTDM driver)





*You'll probably still want to compile and install the Xenomai
user-spacetools (or copy the /home/linuxcnc/xenomai-2.6 folder from the
MachineKitinstall), but the build requirements are much lighter for Xenomai
thanfor LinuxCNC*

If I've understood what you said, I'd better have to copy from the built
image* /home/linuxcnc/xenomai-2.6, *but
that won't suffice to have eMMC working.




2014-02-03 Charles Steinkuehler :

> On 2/3/2014 9:38 AM, David Lewin wrote:
> > Thanks a lot Charles it helps me a lot.
> >
> > As I m somewhat surprised by these results -even if they are in user
> space-
> > I'd like to get more familiar with the build, and being able to put the
> > Machinekit or Xenomai image directly in eMMC to avoid SD accesses ,
> hoping
> > to have better latency results.
>
> You can use the Xenomai kernel with any of the Debian images from RCN,
> just install to the eMMC then update the kernel.
>
> The MachineKit images are on SD card to support LinuxCNC and it's (large
> set of) build dependencies.  You can get a much lighter-weight system
> running Xenomai if that's all you are interested in.
>
> You'll probably still want to compile and install the Xenomai user-space
> tools (or copy the /home/linuxcnc/xenomai-2.6 folder from the MachineKit
> install), but the build requirements are much lighter for Xenomai than
> for LinuxCNC.
>
> --
> Charles Steinkuehler
> char...@steinkuehler.net
>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
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Re: [beagleboard] Re: Lapack and BLAS on BBB

[Charles Steinkuehler]

I know nothing about Lapack and BLAS, but if installation was really
easy under Ubuntu, and you're apparently familiar with Ubuntu, why not
just run Ubuntu on the BeagleBone?

On 2/3/2014 11:23 AM, Jacob Stockton wrote:
> Anybody?
> 
> On Saturday, February 1, 2014 4:29:24 PM UTC-6, Jacob Stockton wrote:
>>
>> Hello,
>>
>> I need help installing LAPACK and BLAS on the BBB when using the Angstrom 
>> distro. On Ubuntu it was really easy. I just installed using sudo apt-get 
>> install liblapack-dev. But installing using just the lapack 
>> fileshas been difficult, mostly because I am 
>> not that experienced when it comes 
>> to embedded linux. It seems the primary issue may be that I don't have the 
>> gfortran package. After following the guide 
>> here,
>>  
>> I get the error 'make: gfortran: Command not found'.
>>
>> I have tried installing gfortran using the command: opkg install gfortran. 
>> However, it seems the package does not exist. Any ideas? Is there another 
>> fortran compiler out there?
>>
>> Thanks,
>>
>> Jacob Stockton

-- 
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char...@steinkuehler.net

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[beagleboard] Re: New board, sdcard holder broke

[pjkim00]

I took a roll of the dice and decided solder the thing back on-- I have 
done SMD soldering before. I was able to get the SD card reattached with 
good solder joints to the pads and mechanical connection from the metal 
case to the ground pads. It works just fine now.

Here is a picture of the board prior to repair. There is a small piece of 
paper wedged in to better show the separation.



Also, someone from CircuitCo contacted me directly to rectify my problem-- 
it seems they monitor this forum rather closely! It is nice to see a 
company respond so quickly and positively.

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[beagleboard] Re: Lapack and BLAS on BBB

[Jacob Stockton]

Anybody?

On Saturday, February 1, 2014 4:29:24 PM UTC-6, Jacob Stockton wrote:
>
> Hello,
>
> I need help installing LAPACK and BLAS on the BBB when using the Angstrom 
> distro. On Ubuntu it was really easy. I just installed using sudo apt-get 
> install liblapack-dev. But installing using just the lapack 
> fileshas been difficult, mostly because I am 
> not that experienced when it comes 
> to embedded linux. It seems the primary issue may be that I don't have the 
> gfortran package. After following the guide 
> here,
>  
> I get the error 'make: gfortran: Command not found'.
>
> I have tried installing gfortran using the command: opkg install gfortran. 
> However, it seems the package does not exist. Any ideas? Is there another 
> fortran compiler out there?
>
> Thanks,
>
> Jacob Stockton
>

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Re: [beagleboard] Nodejs program in Cloud9 autorun folder does not run properly

[Jason Kridner]

On Sat, Jan 25, 2014 at 2:53 PM,  wrote:

> Hello,
> I am trying to get a program to run at boot up by placing it in the Cloud9
> auto run folder but it does not work properly.
>  My nodes version is 0.10.24
>

Guess you aren't using the Angstrom image. Do you know if
bonescript/autorun.js is actually running? Angstrom has it started with
systemd. The systemd service to run it is in the systemd directory of the
BoneScript repository.

Also, what version of BoneScript are you running? There was a bug in older
versions of BoneScript's autorun where the lack of handling STDIO caused
programs to end immediately after starting.

Test version with:

node -pe "require('bonescript').getPlatform().bonescript"


> My Kernel version is : Linux beaglebone 3.8.13 #1 SMP Tue Jun 18 02:11:09
> EDT 2013 armv7l GNU/Linux
>
> The program runs in the cloud9 environment and from the command line
> /var/lib/cloud9/autorun node controlautorun
>
> I could create a service that is called at boot time but I really would
> like to find the problem with the auto run system.
>
> The program communicates serially with another device so I can
> see immediately if the serial data is being sent.
>
> The first thing I did was to send the console log to a file. It is not
> written-to when the controlautorun is started by autorun. I believe
> controlautorun is started and stopped before opening the serial port here
> is a log from journalctl:
>
> Jan 25 13:34:41 beaglebone bonescript-autorun[134]: info: change:
> controlautorun.js
>
> Jan 25 13:34:41 beaglebone bonescript-autorun[134]: info: start:
> controlautorun.js
>
> Jan 25 13:34:41 beaglebone bonescript-autorun[134]: info: change:
> controlautorun.js
>
> Jan 25 13:34:41 beaglebone bonescript-autorun[134]: info: stop:
> controlautorun.js
>
> Jan 25 13:34:42 beaglebone bonescript-autorun[134]: info: start:
> controlautorun.js
>

Guess that says you are running bonescript/autorun.js fine. Makes me think
you are just running the old version.


>
> also from PS the process id seems to change which is consistent with
> starting and stopping:
>
>
> root@beaglebone:~# ps -aux | grep controlautorun
>
> Warning: bad ps syntax, perhaps a bogus '-'? See
> http://procps.sf.net/faq.html
>
> root  3393  0.0  0.1   1956   576 pts/0S+   14:07   0:00 grep
> controlautorun
>
> root@beaglebone:~# ps -auxwww | grep controlautorun
>
> Warning: bad ps syntax, perhaps a bogus '-'? See
> http://procps.sf.net/faq.html
>
> root  3395  0.0  0.1   1956   576 pts/0S+   14:09   0:00 grep
> controlautorun
>
>
> Here is the first few lines of controlautorun.js:
>
>
> var app = require('http').createServer(handler);
>
> var io = require('/usr/local/lib/node_modules/
> socket.io/lib/socket.io').listen(app);
>
> var fs = require('fs');
>
> var bb = require('bonescript');
>
> var SerialPort = require("serialport").SerialPort;
>
> var serialPort = new SerialPort("/dev/ttyO1",{baudrate:115200}
>
> , false);
>
>
> // logging ===
>
> var fs = require('fs');
>
> var util = require('util');
>
> var log_file = fs.createWriteStream(__dirname + '/debug.log', {flags :
> 'a'});
>
> var log_stdout = process.stdout;
>
>
> console.log = function(d) { //
>
>   log_file.write(util.format(d) + '\n');
>
>   log_stdout.write(util.format(d) + '\n');
>
> };
>
> //  =
>
>
> app.listen(82);
>
> var companyName = 'Luminosys';
>
> var productName = 'RGY800';
>
> var productModelNo ='AB03';
>
> var productID= '100A';
>
> var macAddress = '11:23:45:C7:88:D3';
>
> var IPAddress = '192.168.7.52';
>
> var masterPsw = ' ';
>
> var user1 = ' ';
>
> var user2 = ' ';
>
> var user1Psw= ' ';
>
> var user2Psw= ' ';
>
> var accessPointName = ' ';
>
> var accessPointPsw = ' ';
>
> var state = 'on';
>
> var serialTxDataLenght = '24';
>
> var txDataHeader = 03;
>
> var colorA=3; // 0=off, 1= yellow, 2=green, 3= red,4= flashing red 5=
> flashing green
>
> var redTime=8;
>
> var greenTime=4;
>
> var yellowTime=3;
>
> var clearTime= redTime-greenTime-yellowTime;
>
> var redCountA=8;
>
> var greenCountA=0;
>
> var yellowCountA=0;
>
> var TotalCycleTime;
>
> var FlashingRed=1;
>
> var SolarPresence;
>
> var ADCValues;
>
> var solarPowerPercent;
>
> var batChargePercent;
>
> var solarCurrentPercent;
>
> var daylight;
>
> var temperature;
>
> var tA;  //
>
> var lightTimeDivide=0;
>
> var timerA=5;
>
> var timerB=4;
>
> var phaseA=3;
>
> var phaseB=3;
>
> var syncB=0;
>
> var lightTimeDivide=0;
>
> var flashingRed=0;
>
> var batVolt;
>
> var colorB=0;
>
> var redCountB=8;
>
> var greenCountB=0;
>
> var yellowCountB=0;
>
> var txABuffer = new Buffer(18);
>
> var txASerialBusy=0;
>
> var aSideWatchdog=100;  // tbd
>
>  //** serial port init**
>
>  serialPort.open(function(){
>
> console.log('Serial 1 open');
>
>   //  serialPort.write("test usart1 ", function(err, results){
>
>   //  if (err) console.log('error: ' + err);
>
>   //  console.log('Bytes written  ' + results);
>
>   //  });
>
>  });

Re: [beagleboard] Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches

[Charles Steinkuehler]

On 2/3/2014 9:38 AM, David Lewin wrote:
> Thanks a lot Charles it helps me a lot.
> 
> As I m somewhat surprised by these results -even if they are in user space-
> I'd like to get more familiar with the build, and being able to put the
> Machinekit or Xenomai image directly in eMMC to avoid SD accesses , hoping
> to have better latency results.

You can use the Xenomai kernel with any of the Debian images from RCN,
just install to the eMMC then update the kernel.

The MachineKit images are on SD card to support LinuxCNC and it's (large
set of) build dependencies.  You can get a much lighter-weight system
running Xenomai if that's all you are interested in.

You'll probably still want to compile and install the Xenomai user-space
tools (or copy the /home/linuxcnc/xenomai-2.6 folder from the MachineKit
install), but the build requirements are much lighter for Xenomai than
for LinuxCNC.

-- 
Charles Steinkuehler
char...@steinkuehler.net

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Re: [beagleboard] Beagleboard xM - Angstrom cannot 'opkg update' ::: config files for OPKG are wrong

[Maxim Podbereznyy]

Something tells me that Angstrom is dead
03 Фев 2014 г. 17:08 пользователь  написал:

> Hello All
>
> After a long 'fight' I was able to figure out that the config files for
> the Angstrom package manager are looking into a wrong URL.
>
> The wrong Angstrom images are the Cloud9 ones (and the 'demo' as well as):
>
> Angstrom-Cloud9-IDE-eglibc-ipk-v2011.11-core-beagleboard-2011.11.21.img.gz
> Angstrom-Cloud9-IDE-eglibc-ipk-v2011.11-core-beagleboard.rootfs.tar.bz2
>
> The conf files in '/etc/opkg' are set to: - src/gz base
> http://feeds.angstrom-distribution.org/feeds/*core*/ipk/eglibc/armv7a/base
> - but there is no 'armv7a' under '/core/ipk/eglibc', so it comes with a 404
> error
>
> I have downloaded and compared the conf files in all images and my guess
> is that instead of 'core' it should be 'v2012.05' - I've change all my conf
> files and voila. (conf files in '/etc/opkg').
>
> It would be good if someone from the support team could confirm that that
> is the correct repository for Cloud9-xM, but after comparing all
> possibilities I guessed that to be the one.
>
> So to fix, and start using your Beagleboard-xM using the Cloud9 image you
> need to go to '/etc/opkg' and all the files (except arch.conf) and replace
> 'core' with 'v2012.05' - and then 'opkg update' will work, hopefully, and
> you'll be able to upgrade the packages, etc, etc
>
> PS I tried to find a way to feedback the Angstrom team but I was
> unsuccessful, id=f someone knows how to contact them please tell me and
> I'll do it.
>
> Best,
>
> Joe Rosa
>
>
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Re: [beagleboard] Re: NFS server on beaglebone black

[Andrea Pola]

This is the result of cat /proc/filesystems

nodevsysfs
nodevrootfs
nodevbdev
nodevproc
nodevcgroup
nodevtmpfs
nodevdevtmpfs
nodevbinfmt_misc
nodevdebugfs
nodevsecurityfs
nodevsockfs
nodevpipefs
nodevanon_inodefs
nodevrpc_pipefs
nodevdevpts
ext3
ext2
ext4
cramfs
nodevramfs
vfat
msdos
nodevnfs
nodevnfs4
nodevjffs2
f2fs
nodevmqueue
nodevmtd_inodefs
nodevubifs
nodevautofs


Il giorno lunedì 3 febbraio 2014 16:35:45 UTC+1, David ha scritto:
>
>  Try cat /proc/filesystems. If nfs doesn't show, then that is your 
> problem. For example:
>
> ~# cat /proc/filesystems
> nodev   sysfs
> nodev   rootfs
> nodev   bdev
> nodev   proc
> nodev   cgroup
> nodev   tmpfs
> nodev   devtmpfs
> nodev   debugfs
> nodev   securityfs
> nodev   sockfs
> nodev   pipefs
> nodev   anon_inodefs
> nodev   rpc_pipefs
> nodev   devpts
> ext3
> ext2
> ext4
> nodev   ramfs
> vfat
> msdos
> nodev   nfs
> nodev   nfs4
> nodev   autofs
> fuseblk
> nodev   fuse
> nodev   fusectl
> btrfs
> f2fs
> nodev   mqueue
> nodev   mtd_inodefs
> nodev   nfsd
>
> On 02/03/2014 09:28 AM, Andrea Pola wrote:
>  
> I'm in the same situation, anyone solved?
>
> It's seems that there is no kernel-module-nfsd for BBB on Angstrom repo...
>
> Il giorno venerdì 13 dicembre 2013 18:01:08 UTC+1, cwrse...@gmail.com ha 
> scritto: 
>>
>>
>>
>> On Friday, December 13, 2013 4:21:36 AM UTC, Olive wrote: 
>>>
>>> Hello, 
>>> I managed to run a NFS server on a Beaglebone a couple of years ago by 
>>> simply installing the following module.
>>>
>>> *opkg nfs-utils install *
>>>
>>>  Revisiting the idea with the Beaglebone black I get the following 
>>> message when installing the package
>>>  *nfs-utils: unsatisfied recommendation for kernel-module-nfsd*
>>>  
>>>  
>>>  It looks as if the kernel doesn't have NFS configured; you'll have to 
>> rebuild it.  (See if there's a /sys/module/nfsd present.)
>>
>> Will
>>  
>>  
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Re: [beagleboard] Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches

[David Lewin]

Thanks a lot Charles it helps me a lot.

What I am doing is trying indeed to experiment and benchmark Xenomai with
Beablegone. Thus, I did some tests from your machinekit in SD Card

In "mesures 1" I've used a set_periodic_timer to toggle a gpio with a 2000
uS task as another process was doing  : ping -f localhost -s 65000
>/dev/null

Dans mesures 2 I did the same  + latency_test -p 100 -T 240.

Check the results here 

As I was a bit wondering I did a latency test  during 1 h but did before echo
0 > /proc/xenoami/latency (instead of 4999 ) :

*lat min|---lat avg|---lat max|-overrun|--msw|--lat best|-lat worst*
11.083| 13.874 | 24.416| 0  | 0  | 6.374 |
32.791

As I m somewhat surprised by these results -even if they are in user space-
I'd like to get more familiar with the build, and being able to put the
Machinekit or Xenomai image directly in eMMC to avoid SD accesses , hoping
to have better latency results.

David


2014-02-03 Charles Steinkuehler :

> On 2/3/2014 8:45 AM, dlewin555 wrote:
> > Is it possible to get a same instructions list for the official
> > one<
> http://git.xenomai.org/xenomai-2.6.git/tree/ksrc/arch/arm/patches/README>?
> >
> > Until now I was using your machinekit Charles, but I'd like to use my
> > own Xenomai that I could change options (to add Traces, reduces
> > latency, etc) .After getting the R. Nelson and checkout to 3.8 repo
> > I'm lost to the next things to do .
> >
> > If it bothers you here, I can create a dedicated post however.
> >
> > PS if it can helps after successfully found how to do it I could put
> > it on a doc that way nobody would ask anymore.
>
> For the MachineKit Xenomai kernels it's very easy, and identical to
> working with Robert Nelson's kernels.  You just work from my github
> repository instead of his (I've added the Xenomai patches to the
> laundry-list of BeagleBone patches his scripts apply):
>
> https://github.com/cdsteinkuehler/linux-dev
>
> You run the ./build_kernel.sh script, so the BeagleBone and Xenomai
> patches will be applied.  You can then edit the configuration as desired
> and rebuild the kernel using tools/rebuild.sh
>
> The latest configuration tweaks I have made at the suggestion of the
> Xenomai folks may be found in the 3.8.13-bone39-xenomai branch.  If you
> find any configuration changes that help with latency or performance,
> please let me know!
>
> --
> Charles Steinkuehler
> char...@steinkuehler.net
>
> --
> For more options, visit http://beagleboard.org/discuss
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Re: [beagleboard] Re: NFS server on beaglebone black

[David Lambert]

Try cat /proc/filesystems. If nfs doesn't show, then that is your 
problem. For example:


~# cat /proc/filesystems
nodev   sysfs
nodev   rootfs
nodev   bdev
nodev   proc
nodev   cgroup
nodev   tmpfs
nodev   devtmpfs
nodev   debugfs
nodev   securityfs
nodev   sockfs
nodev   pipefs
nodev   anon_inodefs
nodev   rpc_pipefs
nodev   devpts
ext3
ext2
ext4
nodev   ramfs
vfat
msdos
nodev   nfs
nodev   nfs4
nodev   autofs
fuseblk
nodev   fuse
nodev   fusectl
btrfs
f2fs
nodev   mqueue
nodev   mtd_inodefs
nodev   nfsd

On 02/03/2014 09:28 AM, Andrea Pola wrote:

I'm in the same situation, anyone solved?

It's seems that there is no kernel-module-nfsd for BBB on Angstrom repo...

Il giorno venerdì 13 dicembre 2013 18:01:08 UTC+1, cwrse...@gmail.com 
ha scritto:




On Friday, December 13, 2013 4:21:36 AM UTC, Olive wrote:

Hello,
I managed to run a NFS server on a Beaglebone a couple of
years ago by simply installing the following module.
/opkg nfs-utils install
/

Revisiting the idea with the Beaglebone black I get the
following message when installing the package
/nfs-utils: unsatisfied recommendation for kernel-module-nfsd/
/
/

It looks as if the kernel doesn't have NFS configured; you'll have
to rebuild it.  (See if there's a /sys/module/nfsd present.)

Will

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[beagleboard] Re: Running NFS server on BeagleBoard

[Andrea Pola]

I'm on BBB and i've tried to installa this modules, but only exportfs is 
present. How to proceed?

If i try to  start nfsserver  i obtain this message:

creating NFS state directory: done
starting 8 nfsd kernel threads: rpc.nfsd: Unable to access /proc/fs/nfsd 
errno 2 (No such file or directory).
Please try, as root, 'mount -t nfsd nfsd /proc/fs/nfsd' and then restart 
rpc.nfsd to correct the problem
done
starting mountd: Cannot register service: RPC: Unable to receive; errno = 
Connection refused
done
starting statd: done
exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check' 
specified for export "192.168.0.0/255.255.255.0:/home/root/nfs".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

Thanks

opkg install kernel-module-exportfs kernel-module-nfs-acl kernel- 
module-nfsd 



Il giorno lunedì 6 aprile 2009 23:08:41 UTC+2, Andy Ngo ha scritto:
>
> UPDATE:  I finally got the NFS server to run on the BB.  Frans, I 
> followed your directions and it works like a charm.  Thanks. 
>
> Regards, 
> Andy

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[beagleboard] Re: NFS server on beaglebone black

[Andrea Pola]

I'm in the same situation, anyone solved?

It's seems that there is no kernel-module-nfsd for BBB on Angstrom repo...

Il giorno venerdì 13 dicembre 2013 18:01:08 UTC+1, cwrse...@gmail.com ha 
scritto:
>
>
>
> On Friday, December 13, 2013 4:21:36 AM UTC, Olive wrote:
>>
>> Hello,
>> I managed to run a NFS server on a Beaglebone a couple of years ago by 
>> simply installing the following module.
>>
>> *opkg nfs-utils install*
>>
>> Revisiting the idea with the Beaglebone black I get the following message 
>> when installing the package
>> *nfs-utils: unsatisfied recommendation for kernel-module-nfsd*
>>
>>
>> It looks as if the kernel doesn't have NFS configured; you'll have to 
> rebuild it.  (See if there's a /sys/module/nfsd present.)
>
> Will
>  
>

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[beagleboard] Re: Not able to ping through Beaglebone Black on laptop

[cl]

Vikas arora  wrote:
> [-- text/plain, encoding 7bit, charset: UTF-8, 24 lines --]
> 
> 
> 
> I have beaglebone black and I am trying to access internet over USB from my 
> laptop. I am using putty to ssh into beaglebone But the problem is that 
> when I try to ping my laptop using:* PING 192.168.7.1*. It fails. Following 
> is the message that shows up on the screen:
> 
> PING 192.168.7.1 (192.168.7.1) 56(84) bytes of data.
> 
> After this nothing happen. It stucks here and after aborting the process 
> using ctrl+C, it show up this message:
> 
> 69 packets transmitted, 0 received, 100% packet loss, time 68019ms
> 
That is simply saying that the ping isn't working at all.


> How should I ping back to my laptop. It is running windows 8 while 
> beaglebone is running angstrom. Please help...
> 
It's not clear (to me anyway) what exactly you're trying to do.

Are you saying that your laptop is connected to the internet and you
want to connect the Beaglebone Black via the laptop to the internet?
If so then you are going to have to do considerably more than you're
doing at present.

How is the laptop connected to the internet?  The easiest approach, id
it's using a router or something, will be to get the Beaglebone Black to
connect direct to the router in some way.

... I may be completely misunderstanding what you're trying to do of
course!  :-)


-- 
Chris Green
·

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Re: [beagleboard] Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches

[Charles Steinkuehler]

On 2/3/2014 8:45 AM, dlewin555 wrote:
> Is it possible to get a same instructions list for the official
> one?
> 
> Until now I was using your machinekit Charles, but I'd like to use my
> own Xenomai that I could change options (to add Traces, reduces
> latency, etc) .After getting the R. Nelson and checkout to 3.8 repo
> I'm lost to the next things to do .
> 
> If it bothers you here, I can create a dedicated post however.
> 
> PS if it can helps after successfully found how to do it I could put
> it on a doc that way nobody would ask anymore.

For the MachineKit Xenomai kernels it's very easy, and identical to
working with Robert Nelson's kernels.  You just work from my github
repository instead of his (I've added the Xenomai patches to the
laundry-list of BeagleBone patches his scripts apply):

https://github.com/cdsteinkuehler/linux-dev

You run the ./build_kernel.sh script, so the BeagleBone and Xenomai
patches will be applied.  You can then edit the configuration as desired
and rebuild the kernel using tools/rebuild.sh

The latest configuration tweaks I have made at the suggestion of the
Xenomai folks may be found in the 3.8.13-bone39-xenomai branch.  If you
find any configuration changes that help with latency or performance,
please let me know!

-- 
Charles Steinkuehler
char...@steinkuehler.net

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Re: [beagleboard] Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches

[dlewin555]

Is it possible to get a same instructions list for the official 
one
 ?

Until now I was using your machinekit Charles, but I'd like to use my own 
Xenomai that I could 
change options (to add Traces, reduces latency, etc) .After getting the R. 
Nelson and checkout
to 3.8 repo I'm lost to the next things to do .

If it bothers you here, I can create a dedicated post however.

PS if it can helps after successfully found how to do it I could put it on 
a doc that way nobody would ask anymore.

Le lundi 3 février 2014 15:21:50 UTC+1, Charles Steinkuehler a écrit :
>
> On 2/2/2014 10:04 AM, t-szczyrba wrote: 
> > Dear sirs, 
> > 
> > I've done some work concerning porting ipipe patches to Robert Nelson 
> > 3.13-bone5 kernel. 
> > The patches & short descriptions how to apply are stored here: 
> > https://github.com/t-szczyrba/bbb-xenomai-patches 
> > 
> > Please read Robert C Nelson kernel installation documentation as well as 
> > xenomai installation documentation before playing with it, 
>
> Very exciting, thanks for sharing! 
>
> Keep us posted, I'm hoping at some point a Xenomai patched kernel with 
> SGX GPU support will be possible.  You might also want to let the folks 
> on the Xenomai list know you're working on this, there may be someone 
> else trying to do something similar. 
>
> -- 
> Charles Steinkuehler 
> cha...@steinkuehler.net  
>

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Re: [beagleboard] Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches

[Charles Steinkuehler]

On 2/2/2014 10:04 AM, t-szczyrba wrote:
> Dear sirs,
> 
> I've done some work concerning porting ipipe patches to Robert Nelson 
> 3.13-bone5 kernel.
> The patches & short descriptions how to apply are stored here: 
> https://github.com/t-szczyrba/bbb-xenomai-patches
> 
> Please read Robert C Nelson kernel installation documentation as well as 
> xenomai installation documentation before playing with it,

Very exciting, thanks for sharing!

Keep us posted, I'm hoping at some point a Xenomai patched kernel with
SGX GPU support will be possible.  You might also want to let the folks
on the Xenomai list know you're working on this, there may be someone
else trying to do something similar.

-- 
Charles Steinkuehler
char...@steinkuehler.net

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Re: [beagleboard] PWM Subsystem Time Base input clock frequency?

[Charles Steinkuehler]

On 2/2/2014 10:34 AM, robjsstew...@gmail.com wrote:
> Thank you for the reply Charles. That makes sense. The section in the
> TRM on the Time-Base submodule, 15.2.2.3, pp 2004 identifies the "CPU
> system clock" SYSCLKOUT as the source clock for the submodule. I'll
> use your information in my driver and test it with the hardware next
> week.

Yes, it can be quite confusing.

For example, note (1) on Table 15-41 states:

(1) System frequency = SYSCLKOUT, that is, CPU clock. TBCLK = SYSCLKOUT

...but you have to realize each major section of the TRM is written
somewhat independently.  These document various IP cores that mostly get
cut-and-pasted into various SoCs.  If this was a Cortex M4 part (which
this IP core was likely designed for initially), it probably _would_ be
the CPU clock, but in this context they are actually referring to the
primary clock for the module, which on the AM335x comes from the L4
interconnect, not from the CPU.

Later on, note (1) from Table 15-42 states:

(1) System clock, SYSCLKOUT and TBCLK = 100 MHz, 10 ns

...which is much more believable.

Of course pretty much all the clock frequencies can be programmed, shut
down, and otherwise messed with in complicated ways.  Unless you want to
crawl through the kernel clock tree code, testing is the easiest way to
see what frequency it's really running.  Since the maximum supported
frequency is 100 MHz, I'd suspect that's what is getting setup by default.

-- 
Charles Steinkuehler
char...@steinkuehler.net

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Re: [beagleboard] Re: debian: test images (2014-01-22)

[Robert Nelson]

On Mon, Feb 3, 2014 at 4:03 AM,   wrote:
>
>
> Hi Robert,
>   Thank you very much. ' Radium Boards' are  really happy
> for your feedback on our cape.
>   We  have gstreamer support for Angstrom release.We will
> provide you for debian also in shell script  if necessary.

A shell script would be awesome for end users, that way they can have
an easy to way to quickly test there new hardware.  With the newer
debian images, i've setup a dir/git repo that allows us to easily to
push fixes into existing debian images.

You can currently find it under /opt/scripts/ (git pull to resync it)
the repo is located here:
https://github.com/RobertCNelson/boot-scripts

I'd like to get all the cape testing scripts under:
https://github.com/RobertCNelson/boot-scripts/tree/master/device/bone/capes

Regards,

-- 
Robert Nelson
http://www.rcn-ee.com/

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[beagleboard] Xenomai master -> BBB RCNelson 3.13-bone5 kernel patches

[t-szczyrba]

Dear sirs,

I've done some work concerning porting ipipe patches to Robert Nelson 
3.13-bone5 kernel.
The patches & short descriptions how to apply are stored here: 
https://github.com/t-szczyrba/bbb-xenomai-patches

Please read Robert C Nelson kernel installation documentation as well as 
xenomai installation documentation before playing with it,

regards,

T.

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[beagleboard] Re: How to get serial debug information in Beaglebone black

[kumar . ankit008]

Hello ,

 I purchased the ttl to usb convertor and connected with board but 
it is not getting boot up .kindly suggest where i am going wrng.
 For making kernel image ,rootfs , .i followed the procedure given 
in beyondlogic site.

On Wednesday, 11 September 2013 09:40:54 UTC+5:30, cerry wang wrote:
>
>
> I'm new in beaglebone black. I know in original version beaglebone, I can 
> get serial debug information just plugging mini usb to pc. But Beaglebone 
> black can't. I search from 
> http://circuitco.com/support/index.php?title=BeagleBone_Black_Accessoriesand 
> try to use Adafruit 4 Pin Cable (PL2303) by plugging green line to 
> P9-4, white line to P9-5, black line to GND. I use putty trying to get 
> serial information but I can get only much of disorder and non-meaningful 
> characters just like setting wrong baud-rate. But I don't know why I set 
> 115200 in putty and it work in original version beaglebone. How can I get 
> right serial debug information in Beaglebone Black. Thanks.
>

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[beagleboard] Super tiny window manager for Debian

[Maxim Podbereznyy]

Hi!

I use tiny Debian images from RCN, because they fit in small flash. Now I
need the gui, ideally the e17, however I doubt that e17 can fit 256 or 512
NAND flash.

What options can you suggest?

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[beagleboard] Beagleboard xM - Angstrom cannot 'opkg update' ::: config files for OPKG are wrong

[joe]

Hello All

After a long 'fight' I was able to figure out that the config files for the 
Angstrom package manager are looking into a wrong URL.

The wrong Angstrom images are the Cloud9 ones (and the 'demo' as well as):

Angstrom-Cloud9-IDE-eglibc-ipk-v2011.11-core-beagleboard-2011.11.21.img.gz
Angstrom-Cloud9-IDE-eglibc-ipk-v2011.11-core-beagleboard.rootfs.tar.bz2 

The conf files in '/etc/opkg' are set to: - src/gz base 
http://feeds.angstrom-distribution.org/feeds/*core*/ipk/eglibc/armv7a/base 
- but there is no 'armv7a' under '/core/ipk/eglibc', so it comes with a 404 
error

I have downloaded and compared the conf files in all images and my guess is 
that instead of 'core' it should be 'v2012.05' - I've change all my conf 
files and voila. (conf files in '/etc/opkg').

It would be good if someone from the support team could confirm that that 
is the correct repository for Cloud9-xM, but after comparing all 
possibilities I guessed that to be the one.

So to fix, and start using your Beagleboard-xM using the Cloud9 image you 
need to go to '/etc/opkg' and all the files (except arch.conf) and replace 
'core' with 'v2012.05' - and then 'opkg update' will work, hopefully, and 
you'll be able to upgrade the packages, etc, etc

PS I tried to find a way to feedback the Angstrom team but I was 
unsuccessful, id=f someone knows how to contact them please tell me and 
I'll do it.

Best,

Joe Rosa


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Re: [beagleboard] Re: Android running on BBB with Linux 3.8

[pru . priv]

On Sunday, July 7, 2013 4:09:26 AM UTC+2, Andrew Henderson wrote:
>
> [...] 
>
Try testing it out with a USB mouse and making sure that it looks and acts 
> like what you would expect.  If you move the mouse and don't see the 
> cursor, then let us know.  [...]
>
> Andrew   
>
 
Hi Andrew,
I run the 3.8.13 image on BBB with LCD7 cape and I do not have a mouse 
pointer. Plugging-in mouse I can see in the log it is detected. The usb 
keyboard is working fine.
Any hints?

Thanks
Pru 

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Re: [beagleboard] PWM Subsystem Time Base input clock frequency?

[robjsstewart]

On Friday, January 31, 2014 5:57:32 PM UTC-5, Charles Steinkuehler wrote:
> On 1/31/2014 12:38 PM, robjsstew...@gmail.com wrote:
> 
> > According to the TRM, the Time Base module on each of the PWM
> 
> > subsystems is clocked directly from the cpu clock. That is, its being
> 
> > clocked at a period of 1 nsec. 
> 
> 
> 
> Where exactly are you seeing this?  Virtually nothing on the chip but
> 
> the ARM cores and directly connected caches will be running at 1 GHz.
> 
> 
> 
> I show the PWMSS to be clocked by the L4 interconnect clock (see section
> 
> 15.1.2.2) with a maximum functional clock frequency of 100 MHz (15.1.2.3).
> 
> 
> 
> The L4_PER domain the PWM units are all connected to is for "slow"
> 
> peripherals.  The L4_Fast domain used for the PRU is only 200 MHz, and
> 
> I'd be surprised if you could configure the L4_PER clock to be over 100
> 
> MHz (but I haven't crawled through all the clock routing and power
> 
> management logic to prove this).
> 
> 
> 
> > It can be prescaled down to 1/128,for
> 
> > a period of 128 nsecs. The period and the counter compare registers
> 
> > are only 16 bits wide so the minimum PWM frequency is about 120 MHz.
> 
> > Is that correct?
> 
> 
> 
> Take all your GHz numbers and divide by 10 for the actual 100 Mhz clock
> 
> frequency.
> 
> 
> 
> -- 
> 
> Charles Steinkuehler
> 
> char...@steinkuehler.net

Thanks for the reply, Charles. That makes sense.

Table 15-12 on page 2006 of the TRM refers to TBCLK being a prescaled version 
of SYSCLKOUT which is, later in that section, mentioned to be the cpu clock, or 
so I remembered.

Thanks very much.

Bob Stewart

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[beagleboard] http://192.168.7.2 not connecting

[ravindran . vrk]

Hi, 
we got a new beagle bone black hardware. currently i am trying to do the 
startup work.

I connected the BB in windows XP environment PC using the USB cable. After 
booting, i can see the BB as one of the drive and i can browse through the 
index file for startup.
When i click to http://192.168.7.2, the page is not connecting. I tried 
multiple times and the driver are installed as per the previous step. I am 
using the Firefox browser and it takes little bit of time to load the page. 
After sometime, we are getting the error"The connection was reset". ( the 
internet connection is working fine).

I referred multiple docs and i am unable to fix this problem. Can anyone 
help me on this?.

Also, when i try to download the Image Writer Project, the page is showing 
something like this - 'No download files exist for this project.' We unable 
to find the download link. what may be the problem?

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[beagleboard] Re: debian: test images (2014-01-22)

[anithamol . benny]

Hi Robert,
  Thank you very much. ' Radium Boards' are  really happy 
for your feedback on our cape.
  We  have gstreamer support for Angstrom release.We will 
provide you for debian also in shell script  if necessary.
Thanks and Regards,
 Anitha


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[beagleboard] ssh

[Praveen Ramanujam]

Dear All,

When I get connected to the beaglebone black, the board gets powered up, i 
am able to login via serial cable and also can visit the getting started 
page but when I try to do ssh , I hangs at the following :


locomotec@LAPTOP:~$ ssh - root@192.168.7.2
OpenSSH_5.9p1 Debian-5ubuntu1.1, OpenSSL 1.0.1 14 Mar 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 192.168.7.2 [192.168.7.2] port 22.
debug1: Connection established.
debug1: identity file /home/locomotec/.ssh/id_rsa type -1
debug1: identity file /home/locomotec/.ssh/id_rsa-
cert type -1
debug1: identity file /home/locomotec/.ssh/id_dsa type -1
debug1: identity file /home/locomotec/.ssh/id_dsa-cert type -1
debug1: identity file /home/locomotec/.ssh/id_ecdsa type -1
debug1: identity file /home/locomotec/.ssh/id_ecdsa-cert type -1


Can you please help me out here ?

Thanks in advance

Best Regards
Praveen

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[beagleboard] Re: Audio Cape with Beaglebone Black

[rs]

For anybody like me, vaguely understanding what's going on, and ending up 
here: I built 3.8.13-bone39 from Robert Nelsons github site. A slightly 
modified version of cody's patch above is already applied. All you need to 
do is enable the audiocape in uEnv.txt (my cape is Rev 1A), by adding this 
line (or adjusting your optargs line, of course):

optargs=capemgr.enable_partno=BB-BONE-AUDI-01

HDMI audio is automatically switched off (no need to disable HDMIN) when 
the cape is detected. The display continues to work.

Nice, and big thanks to all who made this work! 

Now I'll have to find out why ethernet doesn't work if a usb-keyboard is 
attached, why lsmod doesn't produce any output, and if I can attach a usb 
sounddevice ;)

Best
.r.

On Thursday, 2 May 2013 05:46:47 UTC+1, Robert Twomey wrote:
>
> Hi, 
>
> I'm looking for a dependable stereo audio in / out solution for the 
> Beaglebone Black. 
>
> I see in this 
> thread 
> the 
> suggestion of using a cheap USB soundcard. However, I've had little luck 
> with cheapo usb audio cards on the raspberry pi. I'm worried that it won't 
> work with this system. 
> With the rPi I've been using a C-Media chipset USB audio cards from amazon 
> (
> http://www.amazon.com/Syba-SD-CM-UAUD-Adapter-C-Media-Chipset/dp/B001MSS6CS/ref=sr_1_1?ie=UTF8&qid=1367469801
> ).
>
> I hope maybe the Audio Cape is a better option for me...
> I see the DVI-D Audio cape is listed as "incompatible": 
> http://circuitco.com/support/index.php?title=BeagleBone_Black_Accessories#Capes
> Has anyone tried the Audio Cape with the BBB? 
>
> If not, can you recommend a make or model of USB sound card that worked 
> for both input and output?
>
> Thanks very much!
>
> Robert
>
>
>
>
>

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[beagleboard] Systemd configuring /dev/gps0 for ntpd

[Neil Cobbett]

Hi,

I am using BBB with a GPS to get system time into NTP using the NMEA 
string.  I've done this a few times before.
I have no network connection for ntpd.  (It works if I have a network 
connection but NOT with /dev/gps0 as the only time server)

The problem:  
I map /dev/ttyO1 to /dev/gps0 as a rule in /etc/udev/rules.d 

systemd boots as usual and when ntpdate.service executes /dev/gps0 still 
isn't ready so NTPd fails and hangs since it can't find a time server.
I end up manually having to kill ntpd and restart the ntpdate service again

I have managed to force it to work by disabling ntpdate.service and 
ntpd.service in systemd and instead use CRON to call ntpd 30 seconds after 
boot with a 'sleep 30'.  A rubbish solution I know!  
But it does highlight the fact that NTPd should not run before /dev/gps0 
exists if NTP is to work properly.

My questions -  

1.  How do I get ntpdate.service to only run when /dev/gps0 already exists? 
 i.e. wait until /dev/gps0 is streaming NMEA data.

I have tried a number of 'Before' and 'After' commands  in 
/lib/system/systemd/ntpdate.service with no apparent change.


2.  Why is the creation of /dev/gps0 taking so long?  udev seems to be 
configuring this rule very slowly.  It's only a serial port mapping so why 
take 10's of seconds?

Any help greatly appreciated!
Neil 

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[beagleboard] Re: Unable to SSH to Beagle Bone Black

[andy . w . erickson]

I was having this same problem and this solved it perfectly.  Thank you 
Jimmy!



-Andy

On Wednesday, May 1, 2013 5:07:47 PM UTC-5, jim...@mixographer.com wrote:
>
> I don't have a BBB yet, but I imagine that your ~/.ssh/known_hosts  file 
> has an entry in it for beaglebone.local. remove that line and then you 
> should be able to ssh to the second BBB. Now when you go back to the 
> original BBB it won't match the entry in .ssh/known_hosts (it now matches 
> the second board). Delete the line again for beaglebone.local and you can 
> ssh to the first one. 
>
> Jimmy
>
> On Wednesday, May 1, 2013 2:39:49 PM UTC-7, cmicali wrote:
>>
>> Hi,
>>
>> I got two BBBs in the mail - I plugged one in and everything has been 
>> working fine.  SSHed to it, moved my s/w to it, etc.  I then powered it off 
>> and plugged the other one in and can't SSH to it.  I get a 
>> *ssh_exchange_identification: 
>> Connection closed by remote host* error.  I get this error no matter 
>> what machine I am trying to connect from.  Someone on IRC had this same 
>> problem and didn't think much of it then, but this is a board that is right 
>> out of the box and exhibiting this issue.  The LEDs appear that it has 
>> booted fine.
>>
>>
>>
>> cmicali@imac ~> ssh -vvv root@beaglebone.local
>> OpenSSH_5.9p1, OpenSSL 0.9.8r 8 Feb 2011
>> debug1: Reading configuration data /etc/ssh_config
>> debug1: /etc/ssh_config line 20: Applying options for *
>> debug1: /etc/ssh_config line 53: Applying options for *
>> debug2: ssh_connect: needpriv 0
>> debug1: Connecting to beaglebone.local [192.168.1.32] port 22.
>> *debug1**: Connection established.*
>> debug3: Incorrect RSA1 identifier
>> debug3: Could not load "/Users/cmicali/.ssh/id_rsa" as a RSA1 public key
>> debug1: identity file /Users/cmicali/.ssh/id_rsa type 1
>> debug1: identity file /Users/cmicali/.ssh/id_rsa-cert type -1
>> debug1: identity file /Users/cmicali/.ssh/id_dsa type -1
>> debug1: identity file /Users/cmicali/.ssh/id_dsa-cert type -1
>> *ssh_exchange_identification: Connection closed by*
>> * remote host*
>>
>>
>>
>> Any ideas what could be going on?
>>
>> -chris
>>
>>

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[beagleboard] BBB kernel 3.13 & Xenomai - 2nd approach

[t-szczyrba]

Hello,

I've done some porting Xenomai-2.6.3 to RCNelson's 3.13 BBB kernel.
Patches stored in git repo: 
https://github.com/t-szczyrba/bbb-xenomai-patches
Warning: most of the xenomai tests work ok, but it is not 100% stable. 
Alpha quality work for testing by the brave ones!

Also there are some problems concerning MMC read/write when using that 
version of ipipe, but don't know yet if the bug
is inside of ipipe/ xenomai patches or the interrupts latencies causes 
problems for mmc/dma driver.
Also suspect some problems with mm subsystem,

T.

Ps. I send here the message 2nd time. Hope that it will be visible this 
time.

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[beagleboard] Accessing GPIOs in userspace, kernel 3.8.13

[niclas . karlsson]

Done a litte Möre digging and got a working solution. I verified that the gpio 
was indeed working and toggled as expected. The DHT22 have very strict timing 
requirements when it comes to interpret the data sent from the sensor. It is 
best to do in kernel space. I saw that a driver is in progress for the next 
linux release so as a interim solution I tweaked the application reading the 
sensor and introduce some retries. Now it is possible to get a correct reading.

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[beagleboard] Suspected HW issue with Beaglebone Black

[Vladimir B]

Hi All,

I am trying to rule out SW issues with my BBB (HW Rev A5C) running 
Angstrom.  First I am going to give a bit of background on when the issues 
started and then provide dumps of crashed as seen via UART.



   1. BBB was working fine for quite some time.  
   2. Then I tried to switch from wired ethernet to wireless by plugging in 
   UWN200 (http://www.logicsupply.com/components/networking/wireless/uwn200/) 
   while BBB was powered by DC adapter. 
   3. My SSH over wired Ethernet froze.  
   4. I removed the UWN200 and rebooted a device but could not longer 
   connect via SSH with wired ethernet
   5. Connecting via USB (client) I could not get network connection 
   to 192.168.7.2 either.  As I realized later I did not even have usb0 listed 
   when running ifconfig
   6. At this point I connected via UART
   7. I could see that the kernel was crashing with NULL pointer 
   dereference Oops
   8. Every few restarts it would get past this oops
   9. I shutdown BBB and looked to upgrade to latest Angstrom a few days 
   later, thinking maybe I am just a lucky one to hit a real bug in the kernel
   10. I downloaded the following 
   image 
https://s3.amazonaws.com/angstrom/demo/beaglebone/BBB-eMMC-flasher-2013.09.04.img.xz
 
   into SD card
   11. BBB was booted from SD by holding the boot button.
   12. Flashing process was problematic, it took a few reboots (about) from 
   SD card for eMMC flashing to complete (4 solid LEDs) without kernel Oopsing
  - One of the Oopses was odd as it was for "invalid instruction"
   

To me this feels like a HW problem due to failures manifesting themselves 
in different ways. Segfaults in the apps, NULL pointer dereferences in the 
kernel, Soft CPU lockups.  But I would like to rule out a user error.

Few observations:

   - I have run mtest from uboot without any errors being detected
   - Same for memtester
   - Pressing rest button does not always reboot the device. Sometimes 
   holding power button down is the only way to reboot the BBB. But sometimes 
   it works just fine.
   - For a few reboots accessing BBB via HTTP would causes kernel Oopses. 
Trying it out just now and it worked just fine


The below is done post flashing to the latest angstrom:

   - systemd once segfaulted during boot: http://pastebin.com/YFuxNs8e
   - some times system boots just fine: http://pastebin.com/7HynL8H7
   - "opkg upgrade" consistently segfaults
   - "opkg install strace" consistently segfaults


Any suggestions on what I can do to narrow down the root cause of the issue 
would be greatly appreciated.

Thank you,

Vladimir

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Re: [beagleboard] PWM Subsystem Time Base input clock frequency?

[robjsstewart]

CPU Friday, January 31, 2014 5:57:32 PM UTC-5, Charles Steinkuehler wrote:
> On 1/31/2014 12:38 PM, robjsstew...@gmail.com wrote:
> 
> > According to the TRM, the Time Base module on each of the PWM
> 
> > subsystems is clocked directly from the cpu clock. That is, its being
> 
> > clocked at a period of 1 nsec. 
> 
> 
> 
> Where exactly are you seeing this?  Virtually nothing on the chip but
> 
> the ARM cores and directly connected caches will be running at 1 GHz.
> 
> 
> 
> I show the PWMSS to be clocked by the L4 interconnect clock (see section
> 
> 15.1.2.2) with a maximum functional clock frequency of 100 MHz (15.1.2.3).
> 
> 
> 
> The L4_PER domain the PWM units are all connected to is for "slow"
> 
> peripherals.  The L4_Fast domain used for the PRU is only 200 MHz, and
> 
> I'd be surprised if you could configure the L4_PER clock to be over 100
> 
> MHz (but I haven't crawled through all the clock routing and power
> 
> management logic to prove this).
> 
> 
> 
> > It can be prescaled down to 1/128,for
> 
> > a period of 128 nsecs. The period and the counter compare registers
> 
> > are only 16 bits wide so the minimum PWM frequency is about 120 MHz.
> 
> > Is that correct?
> 
> 
> 
> Take all your GHz numbers and divide by 10 for the actual 100 Mhz clock
> 
> frequency.
> 
> 
> 
> -- 
> 
> Charles Steinkuehler
> 
> char...@steinkuehler.net



On Friday, January 31, 2014 5:57:32 PM UTC-5, Charles Steinkuehler wrote:
> On 1/31/2014 12:38 PM, robjsstew...@gmail.com wrote:
> 
> > According to the TRM, the Time Base module on each of the PWM
> 
> > subsystems is clocked directly from the cpu clock. That is, its being
> 
> > clocked at a period of 1 nsec. 
> 
> 
> 
> Where exactly are you seeing this?  Virtually nothing on the chip but
> 
> the ARM cores and directly connected caches will be running at 1 GHz.
> 
> 
> 
> I show the PWMSS to be clocked by the L4 interconnect clock (see section
> 
> 15.1.2.2) with a maximum functional clock frequency of 100 MHz (15.1.2.3).
> 
> 
> 
> The L4_PER domain the PWM units are all connected to is for "slow"
> 
> peripherals.  The L4_Fast domain used for the PRU is only 200 MHz, and
> 
> I'd be surprised if you could configure the L4_PER clock to be over 100
> 
> MHz (but I haven't crawled through all the clock routing and power
> 
> management logic to prove this).
> 
> 
> 
> > It can be prescaled down to 1/128,for
> 
> > a period of 128 nsecs. The period and the counter compare registers
> 
> > are only 16 bits wide so the minimum PWM frequency is about 120 MHz.
> 
> > Is that correct?
> 
> 
> 
> Take all your GHz numbers and divide by 10 for the actual 100 Mhz clock
> 
> frequency.
> 
> 
> 
> -- 
> 
> Charles Steinkuehler
> 
> char...@steinkuehler.net

Thank you for the reply Charles. That makes sense.
The section in the TRM on the Time-Base submodule, 15.2.2.3, pp 2004 identifies 
the "CPU system clock" SYSCLKOUT as the source clock for the submodule. I'll 
use your information in my driver and test it with the hardware next week.

Again, thanks for your information.

Bob Stewart

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[beagleboard] I can't make BBB rev A5C & LCD7 Cape rev 3 work together :-(

[DoctorP]

Hi,
i'm the newest newbie of all, and I'm having a problem that I can't fix. I 
will try to be as specific as I can: 

I have to confess that I don't know a word of linux, apart from ls, cd and 
these kind of commands...  

I've bought 4 BBB's recently, that are marked as Rev A5C, and 4 LCD7 capes, 
being rev A3. reading the documentation of the LCD cape, it says that i 
need to update the software of the board. After many tries and falls, i'v 
managed to change the firmware in the eMMc to "Cloud9 GNOME Image 
2013.09.04", available on http://beagleboard.org/latest-images. The board 
is working properly, as far as I can say: it boots, and I can access thru 
ssh and see the contents of the flash or execute the Cloud9 environment. 
But I haven't been able to connect successfully the lcd cape. Somentimes, 
it seems to boot, and even shows the calibration screen, but then it 
freezes, most of the times with a blinking cursor on the top of the screen. 
Another awkward behavior is that sometimes (can't remember with which 
software version was) it had booted properly and showed the Desktop, and i 
have run applications in graphic mode.

Attending to http://www.elinux.org/BeagleBone_Black_Capes , there shouldn't 
be compatibility issues between these two boards, so I'm totally depressed.

Reading the posts on this group, all of you seem to be experts on 
compiling, installing and doing awesome things with BBB's.  

So I'm begging any help. No one have had this problem? Could anyone show me 
some light? I might remember that i have a deep unknowing of linux, 
kernels, makes and so on. Also, I don't have the ftdi serial cable 
(although i could build one).  

Thanks in advance,
Manuel P.


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[beagleboard] BEAGLEBONE BLACK Device tree overlay changing parameters not affecting

[Nizar A Rasheed]

Hello All, 

In my BBB, I have connected a custom Audio-cape(based on BBB Audio cape), 
and is working fine.I used BB-BONE-AUDI-01-00A0.dts to get my sound card 
added.

But what ever changes I am making in the BB-BONE-AUDI-01-00A0.dts is not 
affecting at all.

For eg :- the serial-dir fragment under fragment4 of 
BB-BONE-AUDI-01-00A0.dts , I made all entries as 0 as given below, and I 
recompiled and loaded. 







* serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX 
*/0 0 0 00 
0 0 00 0 0 0
0 0 0 0>;*

But still the cape is working fine.Why it is not affecting at all ?

Any helps appreciated ...

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[beagleboard] BeagleBone Black Multiple Codecs (two TLV320AIC3106)

[Nizar A Rasheed]

Hello All,

My Basic Need is to record  4 audio signals using BeagleBONE Black.So I 
started with recording two audio signals at a time using single 
TLV320AIC3106 by taking reference design of AUDIO-CAPE provided. It is 
working  fine.

After doing echo BB-BONE-AUDI-01 > /sys/devices/bone_capemgr.8/slots my 
sound card is getting detected , and arecord -l returns as follows :- 

 List of CAPTURE Hardware Devices 
card 0: EVM [DA830 EVM], device 0: AIC3X tlv320aic3x-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

My connection is --- 

P9_28  MCASP0_AXR2 ---  DOUT Pin of TLV320AIC3106
P9_25  MCASP0_AXR3 ---  DIN pin of   ""
P9_29  WCLK
P9_31  BCLK


My doubts are , when I changed the ' serial - dir ' fragment of 
BB-BONE-AUDI as follows and still its working !!!






*serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX 
*/0 0 0 00 
0 0 00 0 0 0
0 0 0 0>;*

Actually I disabled all AXR PIN and compiled again and loaded.But still its 
working fine.So what ever giving in the Overlay is not taking into 
consideration ??
Also Only PIN9_28 I am able to use for recording.If I connect to some other 
pin to DOUT (for eg :- p8_31 - MCASP0_AXR1 (Mode 3)) ,Nothing is recording.

--- So, why the direction giving in the device tree is not affecting ?
--  Is it by only device tree overlay we can change the mode and direction 
of AXR pins ?






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[beagleboard] Re: Any library available for the BBB, to use MPU-6050 and ADXL335 ?

[n_kurochkin]

You can find code for MPU-6050 and other sensors in MultiWii project 
http://code.google.com/p/multiwii/downloads/list
Look for sensors.cpp or sensors.ino in version 2_2 MPU-6050 realy works.



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[beagleboard] Re: EEPROM ID layout for baseboard

[vescovidavid]

thanks, missed it altogether!

On Friday, January 31, 2014 3:34:53 PM UTC-5, vescov...@gmail.com wrote:
>
> I see the expansion board eeprom layout explained very well in the SRM but 
> I do not see nor can I find the layout for the base beaglebone eeprom.
> It appears to be different from the expansion boards, is this true?
> Where is the info?
>

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[beagleboard] New board, sdcard holder broke

[pjkim00]

Just received a beaglebone black. The SD card holder broke as I pushed a card 
in. The solder joints on one side look like they were dry joints. I am debating 
trying to fix this myself vs sending back. I waited a month to receive this 
board and I am fairly certain I can fix it. I just don't relish waiting another 
month for a replacement.

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[beagleboard] Re: Register Alsa ASOC wm8782 driver

[eze_rg]

Thanks Vaibhav for answering,
So the files that i should edit are davinci-evm.c (platform driver?) and 
wm8782.c (codec driver), right?

I have a few questions :)

*What snd_soc_dai_link structure should i edit? *
(I choosed the da830_dai_link because that was the snd_soc_card struct 
loaded when the BB Audio cape was inserted, but which one should i edit?)
I also tried to write a new davinci-evm.c based on 
this
 file 
(from a kernel source for the raspberry pi), here is the code:
/*
 * ASoC Driver.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include 
#include 

#include 
#include 
#include 
#include 
#include 

static int evm_wm8782_init(struct snd_soc_pcm_runtime *rtd)
{
return 0;
}

static int evm_wm8782_hw_params(struct snd_pcm_substream *substream,
   struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;

/*return snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2);*/
return 0;
}

/* machine stream operations */
static struct snd_soc_ops evm_wm8782_ops = {
.hw_params = evm_wm8782_hw_params,
};

static struct snd_soc_dai_link evm_wm8782_dai[] = {
{
.name = "PCM1803 board",
.stream_name = "PCM1803 board",
.cpu_dai_name = "davinci-mcasp.0",
.codec_dai_name = "wm8782-hifi",
.platform_name = "davinci-pcm-audio",
.codec_name = "wm8782-codec.3-001b",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &evm_wm8782_ops,
.init = evm_wm8782_init,
},
};

/* audio machine driver */
static struct snd_soc_card snd_wm8782_adc = {
.name = "snd_wm8782_adc",
.dai_link = evm_wm8782_dai,
.num_links= ARRAY_SIZE(evm_wm8782_dai),
};

static int snd_wm8782_probe(struct platform_device *pdev)
{
int ret = 0;

snd_wm8782_adc.dev = &pdev->dev;
ret = snd_soc_register_card(&snd_wm8782_adc);
if (ret)
dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);

return ret;
}

static int snd_wm8782_remove(struct platform_device *pdev)
{
return snd_soc_unregister_card(&snd_wm8782_adc);
}

static struct platform_driver snd_wm8782_driver = {
.driver = {
.name   = "snd-wm8782-adc",
.owner  = THIS_MODULE,
},
.probe  = snd_wm8782_probe,
.remove = snd_wm8782_remove,
};

module_platform_driver(snd_wm8782_driver);

MODULE_AUTHOR("E.E.R");
MODULE_DESCRIPTION("ASoC Driver for pcm1803 ADC");
MODULE_LICENSE("GPL v2");

and the codec driver so far is this:


 * sound/soc/codecs/wm8782.c
 * simple, strap-pin configured 24bit 2ch ADC
 *
 * Copyright: 2011 Raumfeld GmbH
 * Author: Johannes Stezenbach 
 *
 * based on ad73311.c
 * Copyright: Analog Device Inc.
 * Author: Cliff Cai 
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

static struct snd_soc_dai_driver wm8782_dai = {
.name = "wm8782-hifi",
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
   SNDRV_PCM_FMTBIT_S24_LE,
},
};

static struct snd_soc_codec_driver soc_codec_dev_wm8782;

static int wm8782_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev,
&soc_codec_dev_wm8782, &wm8782_dai, 1);
}

static int wm8782_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}

static struct platform_driver wm8782_codec_driver = {
.driver = {
.name = "wm8782",
.owner = THIS_MODULE,
},
.probe = wm8782_probe,
.remove = wm8782_remove,
};

module_platform_driver(wm8782_codec_driver);

MODULE_DESCRIPTION("ASoC WM8782 driver");
MODULE_AUTHOR("Johannes Stezenbach ");
MODULE_LICENSE("GPL");


When you say "*You should be looking at the device tree files now*" you 
mean the .dts files?
BTW i'm running ubuntu with 3.8.13 kernel version.

Thanks again for your support!

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[beagleboard] Re: BeagleBone Power switch problems.

[nevans31]

Its a 3.7v Li-Polymer Battery

Thanks

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Re: [beagleboard] No GUI on beaglebone debian?

[Eric Fort]

There's also apt-get install lxde (or the gui desktop window manager
of your choice)

Eric

On Mon, Feb 3, 2014 at 1:33 AM, MARIA VARGHESE
 wrote:
> Hi Robert,
>
> Thank you very much for your great support.I followed your steps
> and I got the GUI on Beagleboneblack.
>
> Thanks and Regards,
> Maria
>
>
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Re: [beagleboard] No GUI on beaglebone debian?

[MARIA VARGHESE]

Hi Robert,

Thank you very much for your great support.I followed your
steps and I got the GUI on Beagleboneblack.

Thanks and Regards,
Maria

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[beagleboard] Not able to ping through Beaglebone Black on laptop

[Vikas arora]

I have beaglebone black and I am trying to access internet over USB from my 
laptop. I am using putty to ssh into beaglebone But the problem is that 
when I try to ping my laptop using:* PING 192.168.7.1*. It fails. Following 
is the message that shows up on the screen:

PING 192.168.7.1 (192.168.7.1) 56(84) bytes of data.

After this nothing happen. It stucks here and after aborting the process 
using ctrl+C, it show up this message:

69 packets transmitted, 0 received, 100% packet loss, time 68019ms

How should I ping back to my laptop. It is running windows 8 while 
beaglebone is running angstrom. Please help...

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