Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[Brandon I]

> A cap big enough should be able to handle that.

Not sure if I did my math right, but for 2 seconds at 2W (beaglebone will
be booting), and assuming his 24V to 5V regulator can regulate with an
input voltage all the way down to 12V, that's around 20mF. I guess that's
doable with $$$.

It wouldn't be as simple as connecting the cap to the accessories line,
since this would absolutely destroy your relay contacts from the inrush in
charging this gigantic cap from 0V. And, you would have to throw a diode in
so you didn't power *all* of your accessories with this cap.


On Tue, Nov 5, 2013 at 9:15 PM, Wilfredo Nieves wrote:

> Not necessarily , my car is a 95 3kgt and it starts within 1-2 seconds of
> turning it over. A cap big enough should be able to handle that. As for the
> 24v idk how I didn't catch that, but then again who knows it is possible.
>
> -Wil
> On Nov 5, 2013 9:30 PM, "Brandon I"  wrote:
>
>>  > I've connected beagleboneblack to my car power supply with 24V to 5V
>> step down.
>>
>> 24V "power supply" in a car? If this means you're this from the
>> accessories circuit, you're doomed. Accessories are turned off while the
>> car is being started, and a cap won't be enough to power the beaglebone,
>> since they stay off as long as you're turning the engine. Another problem
>> is, you'll corrupt the filesystem with an out-of-the-box beaglebone. You'll
>> *have to* use a read only file system.
>>
>> You could tie the beaglebone directly to the battery (with a fuse of
>> course) and use some circuit to monitor when to turn it on and off.
>>
>> On Tuesday, November 5, 2013 9:24:49 AM UTC-8, Wilfredo Nieves wrote:
>>>
>>> I think you should be fine as long as you don't use a value that is too
>>> high or too low. Too high may cause problems with rise time and too low may
>>> not keep enough power supplied for the board to stay powered up. Also  caps
>>> aren't like batteries, the charge almost instantaneously where as batteries
>>> need time to fully charge so as long as you can get the cap charged fast
>>> enough the board should power up without any problems.
>>>
>>> -Wil
>>> On Nov 5, 2013 8:27 AM, "satya gowtham kudupudi" 
>>> wrote:
>>>
 Thank you. I will give a try. As per the post here
 https://groups.google.com/forum/#!msg/beagleboard/
 aXv6An1xfqI/mURD3LfQ5dMJ? the power source should have proper rise
 time. I'm afraid a capacitor will increase the rise time. Any way I'll give
 a try.

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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[Wilfredo Nieves]

Not necessarily , my car is a 95 3kgt and it starts within 1-2 seconds of
turning it over. A cap big enough should be able to handle that. As for the
24v idk how I didn't catch that, but then again who knows it is possible.

-Wil
On Nov 5, 2013 9:30 PM, "Brandon I"  wrote:

> > I've connected beagleboneblack to my car power supply with 24V to 5V
> step down.
>
> 24V "power supply" in a car? If this means you're this from the
> accessories circuit, you're doomed. Accessories are turned off while the
> car is being started, and a cap won't be enough to power the beaglebone,
> since they stay off as long as you're turning the engine. Another problem
> is, you'll corrupt the filesystem with an out-of-the-box beaglebone. You'll
> *have to* use a read only file system.
>
> You could tie the beaglebone directly to the battery (with a fuse of
> course) and use some circuit to monitor when to turn it on and off.
>
> On Tuesday, November 5, 2013 9:24:49 AM UTC-8, Wilfredo Nieves wrote:
>>
>> I think you should be fine as long as you don't use a value that is too
>> high or too low. Too high may cause problems with rise time and too low may
>> not keep enough power supplied for the board to stay powered up. Also  caps
>> aren't like batteries, the charge almost instantaneously where as batteries
>> need time to fully charge so as long as you can get the cap charged fast
>> enough the board should power up without any problems.
>>
>> -Wil
>> On Nov 5, 2013 8:27 AM, "satya gowtham kudupudi" 
>> wrote:
>>
>>> Thank you. I will give a try. As per the post here
>>> https://groups.google.com/forum/#!msg/beagleboard/
>>> aXv6An1xfqI/mURD3LfQ5dMJ? the power source should have proper rise
>>> time. I'm afraid a capacitor will increase the rise time. Any way I'll give
>>> a try.
>>>
>>>  --
>>> For more options, visit http://beagleboard.org/discuss
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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[Brandon I]

> I've connected beagleboneblack to my car power supply with 24V to 5V step 
down.

24V "power supply" in a car? If this means you're this from the accessories 
circuit, you're doomed. Accessories are turned off while the car is being 
started, and a cap won't be enough to power the beaglebone, since they stay 
off as long as you're turning the engine. Another problem is, you'll 
corrupt the filesystem with an out-of-the-box beaglebone. You'll *have to* 
use a read only file system.

You could tie the beaglebone directly to the battery (with a fuse of 
course) and use some circuit to monitor when to turn it on and off.

On Tuesday, November 5, 2013 9:24:49 AM UTC-8, Wilfredo Nieves wrote:
>
> I think you should be fine as long as you don't use a value that is too 
> high or too low. Too high may cause problems with rise time and too low may 
> not keep enough power supplied for the board to stay powered up. Also  caps 
> aren't like batteries, the charge almost instantaneously where as batteries 
> need time to fully charge so as long as you can get the cap charged fast 
> enough the board should power up without any problems.
>
> -Wil
> On Nov 5, 2013 8:27 AM, "satya gowtham kudupudi" 
> > 
> wrote:
>
>> Thank you. I will give a try. As per the post here 
>> https://groups.google.com/forum/#!msg/beagleboard/aXv6An1xfqI/mURD3LfQ5dMJ? 
>> the power source should have proper rise time. I'm afraid a capacitor will 
>> increase the rise time. Any way I'll give a try.
>>
>>  -- 
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[beagleboard] Stache Cam with BeagleBone 3.1MP Camera

[Walter Schilling]

Good afternoon.  

I recently downloaded the stache cam code from the web.  I have a Beaglbone 
black and 3.1 MP Camera Cape.  I've managed to get the code to compile (I 
wanted to cross compile from my Linux environment, but that is a future 
project), but when I run the compiled stache cam code, this is what I get:

VIDIOC_REQBUFS: Cannot allocate memory
munmap: Invalid argument
munmap: Invalid argument
munmap: Invalid argument
munmap: Invalid argument
Unable to stop the stream.: Bad File Descriptor
munmap: Invalid argument
munmap: Invalid argument
munmap: Invalid argument
munmap: Invalid argument
Floating Point Exception

I don't see in the stache cam code where there is a link to a specific 
device for the camera.  If I try running the code passing in a 0 or 1 
(which I assume represents the camera in the system), I receive the error 
message "Could not load 0" or "Could not load 1"

I'm thinking there is something very simple I have wrong, either with the 
driver for the camera or the stache cam code.  Any suggestions?

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Re: [beagleboard] Re: Newbie - Difference in Ti-sdk and Angstorm

[barnett6723]

export QWS_MOUSE_PROTO=linuxinput:/dev/input/event1 --->solve mouse issue

barne...@gmail.com於 2013年11月5日星期二UTC+8下午5時48分17秒寫道：
>
> Hi Jody,
>
> I also used Beaglebone Black without LCD/touchscreen module, just with 
> HDMI out to my Monitor.
> You can try to execute "systemctl disable gdm.service" and 
> "./myQtHelloWorld -qws"
>
> But in my BBB, I can see the window display to my Monitor but the mouse 
> hanged(can not be moved).
>
>
> Jody Baudoin於 2013年9月1日星期日UTC+8上午5時03分21秒寫道：
>>
>>  I only get console debug messages that I put in main.  cout << or 
>> printf(), not sure which I used.
>> I was not sure it was even running, so I put the messages in.
>>
>> It would have been nice if QT could have printed out some error messages 
>> instead of running silently.
>>
>> QT acts like it is happy - I just do not see any graphics.
>>
>> Thanks,
>> Jody
>>
>>
>> On 8/31/2013 00:20, Nilesh Pardesi wrote:
>>  
>>  hi jody,
>>>
>>  
>>
>>>  can you please provide details what console debug massages you are 
>>> getting ? 
>>>
>>>   -- 
>> For more options, visit http://beagleboard.org/discuss
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>>
>> 

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Re: [beagleboard] Re: BeagleBone Black QT GUI Application

[barnett6723]

Thanks lisarden.

I fixed this issue by the following commands.
export QWS_MOUSE_PROTO=linuxinput:/dev/input/event1 


lisarden於 2013年11月5日星期二UTC+8下午10時44分08秒寫道：
>
>
> http://harmattan-dev.nokia.com/docs/library/html/qt4/qt-embedded-pointer.html
>
> you can also use google sometimes ;)
>
>
> 2013/11/5 >
>
>> I used Beaglebone Black without LCD/touchscreen module, just with HDMI 
>> out to my Monitor.
>> When I execute "systemctl disable gdm.service" and "./myQtHelloWorld 
>> -qws",
>> I can see the window display to my Monitor but the mouse hanged(can not 
>> be moved).
>> Can you give me some suggestions for this issue?
>>
>>
>> lisarden於 2013年10月13日星期日UTC+8上午10時46分45秒寫道：
>>>
>>> Disable gdm at all
>>> 11.10.2013 20:39 пользователь "MCU Solution"  написал:
>>>
  when i use the command "pkill gdm" then run my application , its 
 running. but Mouse operation nill. how can i run the button like graphic 
 application without using the command pkill gdm

 any idea ??

 On Friday, October 11, 2013 9:05:31 PM UTC+5:30, MCU Solution wrote:
>
> Yes i have it.
>
> On Friday, October 11, 2013 10:10:23 AM UTC+5:30, MCU Solution wrote:
>>
>> is it possible to run QT GUI Application on Beaglebone Black with 
>> HDMI Output?
>>
>> i try the QT GUI Example ,No Output in the Monitor .but i try hello 
>> world in the terminal  its show hello world but i try GUI application 
>> example like Buttons ,not shown any Output.
>>
>> Any Help?
>>
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>
>
>
> -- 
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[beagleboard] Re: QT runs BUT no graphics output (text output to command windows only)

[barnett6723]

export QWS_MOUSE_PROTO=linuxinput:/dev/input/event1
-->My mouse can be worked.

barne...@gmail.com於 2013年11月5日星期二UTC+8下午5時56分26秒寫道：
>
> I used Beaglebone Black without LCD/touchscreen module, just with HDMI out 
> to my Monitor.
> You can try to execute 
> "systemctl disable gdm.service" 
> and 
> "./myQtHelloWorld -qws", 
> I can see the window display to my Monitor
> but the mouse hanged(can not be moved).
>
>
> Jody Baudoin於 2013年8月21日星期三UTC+8下午9時53分48秒寫道：
>>
>>  Greetings everyone.
>>
>> The program runs, but produces no graphical output.
>> The program does produce "cout" output.
>> The program does not return from the app.exec() call.
>> The build steps & the main.cpp file are included below.
>>
>>
>> I built a QT application using this sequence on Linux Mint:
>>
>> . /usr/local/angstrom/arm/environment-setup
>> qmake qte-example.pro
>> make
>>
>> Used sftp to copy the file to the beagleBone Black desktop.
>>
>>
>> Beaglebone Black "Terminal".  Angstron, with a GUI running on HDMI 
>> monitor, keyboard & moust.
>> //Installation of qt on the beagleBone was as follows:
>> //  opkg update
>> //  opkg install qt4-embedded --force-depends
>> // REM - I am concerned about the need for --force-depends as I do not 
>> understand why it would not work without it.
>>
>> ./qte-example -qws
>>   hello world
>>   right before return
>>
>>
>> main.cpp file:
>>
>> int main(int argc, char** argv) 
>> {
>> cout << "hello world" << endl;
>>
>> QApplication app(argc, argv);
>> QPushButton helloButton("Hello World");
>> helloButton.resize(80, 20);
>> helloButton.show();
>>
>> cout << "right before return" << endl;
>>
>> return app.exec();
>>
>> cout << "right after return" << endl;
>> }
>>
>>
>>
>>
>> Can someone give me a hint or link to a check list?
>> My guess is that the application cannot access the graphics output.
>> Or, maybe the libraries on Mint & BeagleBone do not match.
>>
>> Thanks,
>> Jody
>>  
>

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[beagleboard] Re: Beaglebone Black and Chipsee 7" LCD running Android

[Tony Pitman]

No I did not. I get to the same point and get an error about CC1 not being 
found. 

I am now trying the Freescale iMX6 build and it is working so far.

I wish there was some place to get support on this.

On Tuesday, November 5, 2013 2:11:43 PM UTC-7, bra...@gmail.com wrote:
>
> Did you ever get this working?
>
> On Friday, September 27, 2013 5:21:27 PM UTC-4, Tony Pitman wrote:
>>
>> I am going to purchase a Beaglebone Black and the Chipsee 7" LCD that is 
>> shown running Android. I have see a lot of downloads for different Android 
>> images that will run on the different Beaglebone boards. I would like to 
>> make sure i get the right image and source code. Can someone point me to 
>> the best place to get an image that will just come up in that config and 
>> then also the source so I can build it myself?
>>
>> Thanks...
>>
>

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[beagleboard] Re: OpenWrt on BeagleBone Black

[marc . angles]

https://github.com/artekw/openwrt-bbb


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[beagleboard] Re: BeagleBone userspace SPI interface (spidev) patch

[jhgorse]

Jack,

Can I read your post to mean that the defaults are:

MOSI <-> SPIx_D0

MISO <-> SPIx_D1 


in BBB lingo?

The BBB RM is somewhat devoid of SPI information. The TI 3358 reference 
manual (SPRUH73I rev I, August 2013) shows the opposite on pages 4543 to 
4544, figure 24-1 and table 24-4.

It appears that D0/D1 are configurable. I do not care to configure it. I 
want it to just work the way I wire it, so I want the default. Is D0 MISO 
or MOSI by default?

Cheers,
Joe

On Wednesday, March 21, 2012 5:09:39 AM UTC-4, Jack Mitchell wrote:
>
> Pins 18 and 21 are MISO (Master Input, Slave Output) and MOSI (Master 
> Output, Slave Input), what tying them together does it send the out from 
> your program, to the input of your program, hence you create a loop just 
> reading what you are writing!
>
> Hope that helps clear things up!
>
> Cheers,
>
> --
> Jack Mitchell
> Embedded Systems Engineer
> http://www.embed.me.uk
>
> On Wednesday, 21 March 2012 02:04:49 UTC, emb wrote:
>>
>> ah, thanks mr mitchell 
>>
>> the step i was missing was tying pins 18 and 21 on P9... i'm still not 
>> sure (from reading BONE_SR.pdf) why this is needed...? 
>>
>> anyways thanks again 
>> eb
>
>

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[beagleboard] Re: BeagleBone Black ethernet - no lights

[Felicia James]

Update: I've flashed back to Angstrom and tried again. At least the 
Ethernet lights light up, but they won't stay on. When I go to network 
connections I only see the "ethernet" option for a few seconds at a time. 
And, I tried "pressing down firmly" as well as using different cables and 
ethernet sources. No luck so far. Perhaps I do have broken pins, however, 
its not quite obvious to me. Where do I look for the pins?

On Tuesday, October 29, 2013 2:48:15 PM UTC-4, Michael Mullin wrote:
>
> Look into the ethernet connector and check the actual pins.  It should be 
> obvious.  My first beagleboard black had a broken pin.
>
> On Monday, October 28, 2013 12:26:35 PM UTC-4, Felicia James wrote:
>>
>> Greetings,
>>
>> I'm a proud new owner of a BBB and still in the Newbie category when it 
>> comes to terminal commands. I've been able to successfully boot my BBB 
>> using Angstrom, I've even been able to connect to the internet (at first) 
>> using an Ethernet cable. I have not been able to get the wifi to work - I 
>> have the recommended Edimax wifi dongle (and know it works), but "opkg 
>> update" is not successful. I tried switching to Ubuntu instead (which I am 
>> more familiar and which I know how to connect to the internet...at least 
>> with the desktop version). But, sudo apt-get update doesn't work, so I 
>> can't install ubuntu-desktop either :(
>>
>> That's not the reason for this particular post though. 
>>
>> About the third time I tried using the Ethernet, the connection kept 
>> connecting and unconnecting. That's when I noticed that the green and 
>> yellow network lights were not staying lit. Now, I cannot get them to light 
>> at all. So, before I can address the problem with updating, I need a 
>> network connection.
>>
>> Could there be something wrong with my board? Or, have I possibly messed 
>> up a setting that "turned off" the Ethernet connector?
>>
>> I would appreciate some troubleshooting advice...currently, I have Ubuntu 
>> flashed to the on board memory. If it helps, I'll switch back to Angstrom.
>>
>> Thanks in advance for your assistance,
>>
>> Felicia
>>
>

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[beagleboard] Re: 3.12-rc4: kernel testing time...

[Stoyan Iliev]

Capes don't work any more with DT sources from 3.8.

[7.758602] of_resolve: Could not find symbol 'ocp'
[7.763885] bone-capemgr bone_capemgr.6: slot #3: Failed to resolve tree

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Re: [beagleboard] Re: Beaglebone Black and Chipsee 7" LCD running Android

[Bill Mar]

Special Computing is now offering Chipsee Capacitive Touch 7" LCD as a
complete kit that includes BeagleBoneBlack board with microSD card that
boots a demo image of your choice (Android 4.1, LinuxSDK, WinCE6, WCE7),
along with support DVD containing open source files and documentation.

http://specialcomp.com/beaglebone/#22702


On Fri, Oct 18, 2013 at 12:37 PM, Tony Pitman  wrote:

> When I got the board I received a CD with the images and sources on it. I
> set up an Ubuntu VM to build on and followed the instructions that came on
> the CD to build. I ran into some errors building. In the end I found the
> answer and wanted to post here in case someone else has the same problem.
>
> The instructions give the following command for getting all the required
> packages:
>
> $ sudo apt-get install git-core gnupg flex bison gperf build-essential
> \
> zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs \
> x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev \
> libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown \
> libxml2-utils xsltproc minicom tftpd uboot-mkimage expect
>
> I found that this was missing 2 packages: libc6-dev-i386 and lib32z1-dev
> so I added them. This is the final command:
>
> $ sudo apt-get install git-core gnupg flex bison gperf build-essential
> \
> zip curl zlib1g-dev libc6-dev libc6-dev-i386 lib32ncurses5-dev
> ia32-libs \
> x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev lib32z1-dev
> \
> libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown \
> libxml2-utils xsltproc minicom tftpd uboot-mkimage expect
>
> I hope this helps someone else avoid the 2 days it took me to finally
> track this down. Now that I know to look for this kind of thing I hope it
> won't take me as long to figure out stuff like this.
>
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[beagleboard] Re: Beaglebone Black and Chipsee 7" LCD running Android

[bradmin]

Did you ever get this working?

On Friday, September 27, 2013 5:21:27 PM UTC-4, Tony Pitman wrote:
>
> I am going to purchase a Beaglebone Black and the Chipsee 7" LCD that is 
> shown running Android. I have see a lot of downloads for different Android 
> images that will run on the different Beaglebone boards. I would like to 
> make sure i get the right image and source code. Can someone point me to 
> the best place to get an image that will just come up in that config and 
> then also the source so I can build it myself?
>
> Thanks...
>

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Re: [beagleboard] Re: Read from LV-Maxsonar-EZ0 using uart2

[Gustavo Oliveira]

Thank you Matthew, you confirmed what I didn't want to xD

I switched to analog for now.


On 5 November 2013 16:16, Matthew Witherwax  wrote:

> Gustavo,
>
> I posted a link to my blog below.  I experienced this problem a couple
> years ago when I first started with MaxBotix sonars.  The datasheet isn't
> 100% clear, but the serial signal is inverted.  That is what the person in
> the RPi forum meant about the meaning of the 1s and 0s.  You cannot simply
> flip the received data because the whole stream is inverted (to include
> start bits, etc.).  You need to invert everything.  In my post you will
> find a simple circuit made of 2 resistors and a transistor that will invert
> the signal for you.  If you prefer, you can purchase a hex inverter to
> accomplish the same thing.
>
> I hope it helps you.  To save you from finding my other posts, here is the
> link http://blog.lemoneerlabs.com/post/Hearing-aids
>
> On Monday, November 4, 2013 11:57:41 AM UTC-6, Gustavo Oliveira wrote:
>>
>> Hello,
>> I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface.
>>
>> I have connected the wires correctly and I have placed an overlay in
>> uart2.
>> The problem is the data I'm reading from the sensor. I can only get
>> garbage, but its not completely wrong because the data changes according to
>> the distance to obstacle.
>>
>> The datasheet for the sensor can be found here: 
>> datasheet
>> .
>>
>> I searched google for a day and couldn't find anything...
>> Someone posted in a raspberry pi forum that the problem is the meaning of
>> 1s and 0s, but I changed active_low to 1 and I got the same.
>>
>> I'm not very proficient with electronics, so I might take some time
>> following instructions.
>> Nonetheless all the help will be welcome.
>>
>>  --
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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[Wilfredo Nieves]

I think you should be fine as long as you don't use a value that is too
high or too low. Too high may cause problems with rise time and too low may
not keep enough power supplied for the board to stay powered up. Also  caps
aren't like batteries, the charge almost instantaneously where as batteries
need time to fully charge so as long as you can get the cap charged fast
enough the board should power up without any problems.

-Wil
On Nov 5, 2013 8:27 AM, "satya gowtham kudupudi" 
wrote:

> Thank you. I will give a try. As per the post here
> https://groups.google.com/forum/#!msg/beagleboard/aXv6An1xfqI/mURD3LfQ5dMJ?
> the power source should have proper rise time. I'm afraid a capacitor will
> increase the rise time. Any way I'll give a try.
>
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[beagleboard] Install VLC in Angstrom on BBB

[vinayak aghor]

Hello,
I want to install VLC on angstrom so that I can use data streaming  on 
network. I tried to use command "opkg install vlc". I got response as  
unknown package.
Is thare vlc package on in angstrom? Kindly post on above query.

Regards,
Vinayak 

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[beagleboard] Re: BBB GPIO on P8/P9 Headers

[mike]

Scratch that. Mode 7 is my friend ;-)

On Tuesday, November 5, 2013 9:42:40 AM UTC-7, mi...@gehlvail.net wrote:
>
> With a Beaglebone Black, I want to use the MMC, USB and occasionally an 
> LCD cape. The I/O for peripherals will be entirely SPI based, so I want to 
> use some GPIO pins as chip selects. 
>
> Looking at the P8/P9 header mappings, it looks like P8 is almost entirely 
> used up with MMC and LCD signals, which leaves me P9 for GPIO. What pins 
> are other group members using for GPIO and why?
>

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Re: [beagleboard] BBB GPIO on P8/P9 Headers

[William Hermans]

First do you plan on using HDMI, or an LCD via SPI ? Most of those pins
used by HDMI can be easily recovered. Ive also been told you can reclaim a
few from the eMMC too, but have not tried it personally.

Secondly, you need to do a bit of reading / understanding of what you're
working with. No different from anyone else who has been working with these
boards a while. Read the SRM , and TRM( technical reference manual of the
AM335x processors ).

Then use google, and the search feature of these forums. There is a lot of
useful information out there. You just have to look for it.


On Tue, Nov 5, 2013 at 9:42 AM,  wrote:

> With a Beaglebone Black, I want to use the MMC, USB and occasionally an
> LCD cape. The I/O for peripherals will be entirely SPI based, so I want to
> use some GPIO pins as chip selects.
>
> Looking at the P8/P9 header mappings, it looks like P8 is almost entirely
> used up with MMC and LCD signals, which leaves me P9 for GPIO. What pins
> are other group members using for GPIO and why?
>
> --
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Re: [beagleboard] laptop doesn't recognize bbb as a storage device

[evilwulfie]

come on you guys  keep the attachments down to 2-3 k



On 11/5/2013 5:17 AM, Erdem YILMAZ wrote:
>
> Hello,
>
> I am a newbie so i'm sorry if this problem is very easy. but i
> couldn't solve it by myself.
> i got a beaglebone black A5C  a week ago from Farnell 
>
> when i connect the bbb to laptop the process is like below
>
> 1. power led is on
> 2. four seconds later usr0 is on
> 3. after that usr1 and usr2 are on
> 4. all the usr leds are on
> 5. usr0 is heartbeating
>
> enclosed you can find a file which shows led status when connected.
>
> I installed the bone_drv.exe program.
>
> i left the bbb connected to laptop more than 30 minutes but laptop
> didn't recognize it. I've tried a win7 laptop, winxp laptop, winxp
> desktop pc, win7 64bit desktop pc but none of them recognize it.
>
> so i have used several different usb cables and the result is
> unfortunately same.
>
> I have checked the usb cables by avometer. the cables are ok.
>
> I have downloaded usbview program and connected the bbb and i see the
> program doesnt recognize it.
>
> but beaglebone black's leds are blinking so it seems like running but
> usb connection.
> -- 
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[beagleboard] BBB GPIO on P8/P9 Headers

[mike]

With a Beaglebone Black, I want to use the MMC, USB and occasionally an LCD 
cape. The I/O for peripherals will be entirely SPI based, so I want to use 
some GPIO pins as chip selects. 

Looking at the P8/P9 header mappings, it looks like P8 is almost entirely 
used up with MMC and LCD signals, which leaves me P9 for GPIO. What pins 
are other group members using for GPIO and why?

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Re: [beagleboard] kernel bug cpsw.c in linux arm 3.8.13-bone28

[Robert Nelson]

On Tue, Nov 5, 2013 at 9:52 AM,   wrote:
> I encountered a bug while using the latest transmission-bt in a A5B version
> of BBB. Could you please point me to the bug tracker you are using or have a
> look and let me know what bug tracker I could use for the following bug:
>
> http://pastebin.com/raw.php?i=reDRxxvE
>
> This is the first time I tried to use a BBB for such task. Running 'stress'
> for couple of hours on the BBB did not reproduced the kernel trace.
>
> Also if I am setting the cpufreq governor to performance the bug is not
> happening. I suspect there is something wrong with cpsw.c and i2c while
> encountering a cpu frequency transition.
>
> The effect of the bug is that the eth0 capacity fails completely and pinging
> the bbb produces a ttl expired in transition. The usb0 is not affected.
>
> Running debian 7.1 and the latest kernel from
> http://rcn-ee.net/deb/wheezy-armhf/v3.8.13-bone28/

Can you confirm the bug still exists on v3.12?

wget http://rcn-ee.net/deb/wheezy-armhf/v3.12.0-rc7-bone8/install-me.sh
sudo /bin/bash install-me.sh

(little behind, as i haven't pushed v3.12.x final yet..)

Note, this does not support external capes yet..

Regards,

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

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[beagleboard] kernel bug cpsw.c in linux arm 3.8.13-bone28

[iustinian]

I encountered a bug while using the latest transmission-bt in a A5B version 
of BBB. Could you please point me to the bug tracker you are using or have 
a look and let me know what bug tracker I could use for the following bug:

http://pastebin.com/raw.php?i=reDRxxvE

This is the first time I tried to use a BBB for such task. Running 'stress' 
for couple of hours on the BBB did not reproduced the kernel trace.

Also if I am setting the cpufreq governor to performance the bug is not 
happening. I suspect there is something wrong with cpsw.c and i2c while 
encountering a cpu frequency transition.

The effect of the bug is that the eth0 capacity fails completely and 
pinging the bbb produces a ttl expired in transition. The usb0 is not 
affected.

Running debian 7.1 and the latest kernel from 
http://rcn-ee.net/deb/wheezy-armhf/v3.8.13-bone28/

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Re: [beagleboard] Re: UBIFS/U-Boot and UBIFS/Linux not compatible

[matti . kaasinen]

Hi Tom!
I don't seem to find proper order using below patch sets. 

tiistai, 5. marraskuuta 2013 10.35.25 UTC+2 matti kaasinen kirjoitti:
>
> Hi Tom,
> I'm terribly sorry annoying you for once more time with this issue. I have 
> tried to figure out what patch sets you are suggesting below.
> 2013/11/2 
>
>> I think that at least part of the answer is that you need to enable 
>> CONFIG_SYS_NAND_ONFI_**DETECTION.  You may also need to apply some of 
>> Pekon's patches from http://patchwork.ozlabs.org/**
>> project/uboot/list/?submitter=**17320&state=*(there
>>  are 3 series there as of this writing, 2 v2's and a v8, you should 
>> apply all 3 series, and in the right order, saving each series to an mbox, 
>> and using git am -3 / git am --abort when they fail should help get the 
>> right order sorted out quickly).
>>
>
> So, to make it clear as crystal even for me, let's list what I found 
> matching with your message:
> 2013-08-14
> [U-Boot,v2,1/4] mtd: nand: omap: enable BCH ECC scheme using ELM for 
> generic platform
> [U-Boot,v2,2/4] mtd: nand: omap: optimize chip->ecc.hwctl() for H/W ECC 
> schemes
> [U-Boot,v2,3/4] mtd: nand: omap: optimize chip->ecc.calculate() for H/W 
> ECC schemes
> [U-Boot,v2,4/4] mtd: nand: omap: optimized chip->ecc.correct() for H/W ECC 
> schemes
>
> 2013-09-06
>
2013-09-10 

> [U-Boot,v2,1/3] am33xx: elm: add support for BCH16_ECC - ELM driver updates
> [U-Boot,v2,2/3] mtd: nand: omap: add support for BCH16_ECC - NAND driver 
> updates
> [U-Boot,v2,3/3] am335x: update README for BCH16
>
> 2013-09-30
> [U-Boot,v2,1/4] mtd: nand: add NAND_BUSWIDTH_AUTO to autodetect bus width
> [U-Boot,v2,2/4] am33xx: add CONFIG_SYS_NAND_DEVICE_WIDTH to determine NAND 
> device bus-width
> [U-Boot,v2,3/4] am335x: fix GPMC config for NAND and NOR SPL boot
> [U-Boot,v2,4/4] am33xx: add support for beaglebone x16 NAND cape
>
> 2013-10-10
> [U-Boot,v8,1/5] mtd: nand: omap: enable BCH ECC scheme using ELM for 
> generic platform
> [U-Boot,v8,2/5] mtd: nand: omap: optimize chip->ecc.hwctl() for H/W ECC 
> schemes
> [U-Boot,v8,3/5] mtd: nand: omap: optimize chip->ecc.calculate() for H/W 
> ECC schemes
> [U-Boot,v8,4/5] mtd: nand: omap: optimized chip->ecc.correct() for H/W ECC 
> schemes
> [U-Boot,v8,5/5] board/ti/am335x/README: update for NAND boot
>
> It seems to me that 2013-08-14 and 2013-10-10 are providing (more or less) 
> same patch set 
> => My choice is 2013-10-10
> 2013-09-06 and 2013-09-30 seem different to me 
> => these are the 2v2's your mentioned above
>
> My guess for patching order would be:
> 1) 2013-10-10
> 2) 2013-09-06
>
2) 2013-09-10 

> 3) 2013-09-30
>

Patch sets  1) 2013-10-10 and 3) 2013-09-30 work fine if 1) is executed 
first. However, 2) 2013-09-10 fails in every position. In particular:
"[U-Boot,v2,2/3] mtd: nand: omap: add support for BCH16_ECC - NAND driver 
updates"
fails in several places. Firs one takes place when appending 

arch/arm/include/asm/arch-am33xx/omap_gpmc.h.
It tries to make following replacement:
-   OMAP_ECC_BCH8_CODE_HW+  OMAP_ECC_BCH8_CODE_HW,

even though that comma was already provided by:
"[U-Boot,v8,1/5] mtd: nand: omap: enable BCH ECC scheme using ELM for generic 
platform"
while creating the stuct including that line.
So, somehow it seems that some more patches are required in order to get these 
patches run.

Best regards,
Matti

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[beagleboard] Re: dmesg messages

[craig . markwardt]

I've found that in more recent releases the BEAGLEBONE partition is not 
mounted by default.  

In case it's not, you should mount it first,
   mount /dev/mmcblk0p1 /media/BEAGLEBONE
before trying to edit the uEnv.txt file.

On Monday, November 4, 2013 9:59:49 PM UTC-5, daen...@yahoo.com wrote:
>
> Not doing it for me. Tried both on a fresh install of 2013-09-04 image.
>
> Hate to think of it as eating up the limited amount of flash storage.
>
>
> On Saturday, July 20, 2013 4:01:55 PM UTC-4, craig.m...@gmail.com wrote:
>>
>> Edit
>>   /media/BEAGLEBONE/uEnv.txt
>> and change
>>   drm.debug=7
>> to either of these two,
>>   drm.debug=3
>>   drm.debug=11
>> This is a bit mask.  The "4" value produces the plentiful HDM connector 
>> messages, so by subtracting 7-4=3 you remove the offending messages.
>>
>> Craig
>>
>> On Wednesday, June 5, 2013 2:30:03 AM UTC-4, tvv...@gmail.com wrote:
>>>
>>> Hi
>>> I have BBB with Angstrom 2013-05-27. After dmesg I get:
>>>
>>> [ 72.936416] gen_ndis_query_resp: RNDIS_OID_GEN_RCV_NO_BUFFER
>>> [ 72.940091] gadget: rndis reqa1.01 v i l4096
>>> [ 72.940361] gadget: rndis req21.00 v i l36
>>> [ 72.944095] gadget: rndis reqa1.01 v i l4096
>>> [ 72.944390] gadget: rndis req21.00 v i l36
>>> [ 72.948090] gadget: rndis reqa1.01 v i l4096
>>> [ 72.948374] gadget: rndis req21.00 v i l36
>>> [ 72.948412] gen_ndis_query_resp: RNDIS_OID_GEN_RCV_NO_BUFFER
>>> [ 72.952062] gadget: rndis reqa1.01 v i l4096
>>> [ 72.952189] gadget: rndis req21.00 v i l36
>>> [ 72.956092] gadget: rndis reqa1.01 v i l4096
>>> [ 80.906804] [drm:output_poll_execute], [CONNECTOR:5:HDMI-A-1] status 
>>> updated from 2 to 2
>>>
>>> Every 10 sec  [drm:output_poll_execute], [CONNECTOR:5:HDMI-A-1] status 
>>> updated from 2 to 2.
>>> Is it notmal?
>>>
>>

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[beagleboard] Re: Read from LV-Maxsonar-EZ0 using uart2

[Matthew Witherwax]

Gustavo,

I posted a link to my blog below.  I experienced this problem a couple 
years ago when I first started with MaxBotix sonars.  The datasheet isn't 
100% clear, but the serial signal is inverted.  That is what the person in 
the RPi forum meant about the meaning of the 1s and 0s.  You cannot simply 
flip the received data because the whole stream is inverted (to include 
start bits, etc.).  You need to invert everything.  In my post you will 
find a simple circuit made of 2 resistors and a transistor that will invert 
the signal for you.  If you prefer, you can purchase a hex inverter to 
accomplish the same thing.

I hope it helps you.  To save you from finding my other posts, here is the 
link http://blog.lemoneerlabs.com/post/Hearing-aids

On Monday, November 4, 2013 11:57:41 AM UTC-6, Gustavo Oliveira wrote:
>
> Hello,
> I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface.
>
> I have connected the wires correctly and I have placed an overlay in uart2.
> The problem is the data I'm reading from the sensor. I can only get 
> garbage, but its not completely wrong because the data changes according to 
> the distance to obstacle.
>
> The datasheet for the sensor can be found here: 
> datasheet
> .
>
> I searched google for a day and couldn't find anything...
> Someone posted in a raspberry pi forum that the problem is the meaning of 
> 1s and 0s, but I changed active_low to 1 and I got the same.
>
> I'm not very proficient with electronics, so I might take some time 
> following instructions.
> Nonetheless all the help will be welcome.
>
>

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Re: [beagleboard] Read from LV-Maxsonar-EZ0 using uart2

[Matthew Witherwax]

If you contact MaxBotix or check the specs on the Pololu page
http://www.pololu.com/product/723/ you can see it has the following outputs

   - Three interfaces (all are active simultaneously):
  - Serial output: asynchronous, logic-level, *inverted*, 9600 bps 8N1
  - Analog output: (Vcc/512) / inch (10 mV/inch when input voltage Vcc
  = 5 V)
  - Pulse width output: 147 μs/inch



On Tue, Nov 5, 2013 at 9:37 AM, Mike Bremford  wrote:

> At risk of asking the obvious, have you double checked you're putting out
> serial data? Your datasheet requires the BW pin to be floating or low to
> output out serial data, otherwise it puts out pulse data on the same pin.
>
> Before you try the inverter approach, maybe just put a multimeter on the
> Tx pin on the device - it should be high (ie 3.3V) most of the time. If
> it's transmitting once per second, NMEA0183-style, even then the voltage
> should be closer to 3.3V than GND. If it's closer to GND, then you'll need
> to invert it.
>
> I'm working with a whole stack of NMEA0183 devices and assuming they're
> properly functioning, the only thing you can really get wrong are baud
> rate, inverted signal, wrong pin (tx instead of rx, in which case you hear
> nothing) or software config error. For software, I just use screen -
> "screen /dev/ttyO2 9600" - rather than minicom or any of the other scripts.
> Much easier.
>
>
> On 5 November 2013 09:52, Gustavo Oliveira wrote:
>
>> I guess I did some mistake answering back there =P
>> It is in UART_RX.
>>
>> I search the internet and found that maybe I'm getting the inverted
>> messages, all the 1s as 0s and the 0s as 1s.
>>
>>
>> On 5 November 2013 09:50, Gustavo Oliveira wrote:
>>
>>> 1) I'm using the 3.3V pin, so the voltage is acceptable in p9_22.
>>>
>>> 2) What do you mean by setttings, the fields when I export the pin? Or
>>> the pin mode? I think mine are ok, what should they be?
>>>
>>> 3) I tried many applications, python scripts, c scripts, minicom...
>>>
>>>
>>> On 5 November 2013 05:26, Maxim Podbereznyy  wrote:
>>>
 1) I would place a voltage translator or a simple voltage divider based
 on two resistors to reduce 5 volts to the acceptable 3.3V.

 2) check the pinmux settings for that pin

 3) what terminal application do you use to read data? Check the serial
 port parameters and don't forget to disable the hardware flow control if 
 any
 05 нояб. 2013 г. 3:55 пользователь "Gustavo Oliveira" <
 gustavo.pinho...@gmail.com> написал:

> Hi, thank you for quick reply,
> I'm using a BeagleBone and Ubuntu 12.04.
>
> I have the TX connected to p9_22, which is uart2 RX.
>
> On Monday, November 4, 2013 7:38:06 PM UTC, lisarden wrote:
>>
>> hi!
>>
>> what board do you use and what OS?
>>
>> your datasheet says that VCC is +5V and the TX pin also work in 0-VCC
>> range. If you use beaglebone it accepts only 3.3V, however there can be
>> options
>>
>>
>> 2013/11/4 Gustavo Oliveira 
>>
>>> Hello,
>>> I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface.
>>>
>>> I have connected the wires correctly and I have placed an overlay in
>>> uart2.
>>> The problem is the data I'm reading from the sensor. I can only get
>>> garbage, but its not completely wrong because the data changes 
>>> according to
>>> the distance to obstacle.
>>>
>>> The datasheet for the sensor can be found here: 
>>> datasheet
>>> .
>>>
>>> I searched google for a day and couldn't find anything...
>>> Someone posted in a raspberry pi forum that the problem is the
>>> meaning of 1s and 0s, but I changed active_low to 1 and I got the same.
>>>
>>> I'm not very proficient with electronics, so I might take some time
>>> following instructions.
>>> Nonetheless all the help will be welcome.
>>>
>>>  --
>>> For more options, visit http://beagleboard.org/discuss
>>> ---
>>> You received this message because you are subscribed to the Google
>>> Groups "BeagleBoard" group.
>>> To unsubscribe from this group and stop receiving emails from it,
>>> send an email to beagleboard...@googlegroups.com.
>>> For more options, visit https://groups.google.com/groups/opt_out.
>>>
>>
>>
>>
>> --
>> LinkedIn - http://www.linkedin.com/in/maximpodbereznyy
>> Company - http://www.linkedin.com/company/mentorel
>> Facebook - https://www.facebook.com/mentorel.company
>>
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Re: [beagleboard] Read from LV-Maxsonar-EZ0 using uart2

[Mike Bremford]

At risk of asking the obvious, have you double checked you're putting out
serial data? Your datasheet requires the BW pin to be floating or low to
output out serial data, otherwise it puts out pulse data on the same pin.

Before you try the inverter approach, maybe just put a multimeter on the Tx
pin on the device - it should be high (ie 3.3V) most of the time. If it's
transmitting once per second, NMEA0183-style, even then the voltage should
be closer to 3.3V than GND. If it's closer to GND, then you'll need to
invert it.

I'm working with a whole stack of NMEA0183 devices and assuming they're
properly functioning, the only thing you can really get wrong are baud
rate, inverted signal, wrong pin (tx instead of rx, in which case you hear
nothing) or software config error. For software, I just use screen -
"screen /dev/ttyO2 9600" - rather than minicom or any of the other scripts.
Much easier.


On 5 November 2013 09:52, Gustavo Oliveira wrote:

> I guess I did some mistake answering back there =P
> It is in UART_RX.
>
> I search the internet and found that maybe I'm getting the inverted
> messages, all the 1s as 0s and the 0s as 1s.
>
>
> On 5 November 2013 09:50, Gustavo Oliveira wrote:
>
>> 1) I'm using the 3.3V pin, so the voltage is acceptable in p9_22.
>>
>> 2) What do you mean by setttings, the fields when I export the pin? Or
>> the pin mode? I think mine are ok, what should they be?
>>
>> 3) I tried many applications, python scripts, c scripts, minicom...
>>
>>
>> On 5 November 2013 05:26, Maxim Podbereznyy  wrote:
>>
>>> 1) I would place a voltage translator or a simple voltage divider based
>>> on two resistors to reduce 5 volts to the acceptable 3.3V.
>>>
>>> 2) check the pinmux settings for that pin
>>>
>>> 3) what terminal application do you use to read data? Check the serial
>>> port parameters and don't forget to disable the hardware flow control if any
>>> 05 нояб. 2013 г. 3:55 пользователь "Gustavo Oliveira" <
>>> gustavo.pinho...@gmail.com> написал:
>>>
 Hi, thank you for quick reply,
 I'm using a BeagleBone and Ubuntu 12.04.

 I have the TX connected to p9_22, which is uart2 RX.

 On Monday, November 4, 2013 7:38:06 PM UTC, lisarden wrote:
>
> hi!
>
> what board do you use and what OS?
>
> your datasheet says that VCC is +5V and the TX pin also work in 0-VCC
> range. If you use beaglebone it accepts only 3.3V, however there can be
> options
>
>
> 2013/11/4 Gustavo Oliveira 
>
>> Hello,
>> I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface.
>>
>> I have connected the wires correctly and I have placed an overlay in
>> uart2.
>> The problem is the data I'm reading from the sensor. I can only get
>> garbage, but its not completely wrong because the data changes according 
>> to
>> the distance to obstacle.
>>
>> The datasheet for the sensor can be found here: 
>> datasheet
>> .
>>
>> I searched google for a day and couldn't find anything...
>> Someone posted in a raspberry pi forum that the problem is the
>> meaning of 1s and 0s, but I changed active_low to 1 and I got the same.
>>
>> I'm not very proficient with electronics, so I might take some time
>> following instructions.
>> Nonetheless all the help will be welcome.
>>
>>  --
>> For more options, visit http://beagleboard.org/discuss
>> ---
>> You received this message because you are subscribed to the Google
>> Groups "BeagleBoard" group.
>> To unsubscribe from this group and stop receiving emails from it,
>> send an email to beagleboard...@googlegroups.com.
>> For more options, visit https://groups.google.com/groups/opt_out.
>>
>
>
>
> --
> LinkedIn - http://www.linkedin.com/in/maximpodbereznyy
> Company - http://www.linkedin.com/company/mentorel
> Facebook - https://www.facebook.com/mentorel.company
>
  --
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 ---
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>>> ---
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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[satya gowtham kudupudi]

Thank you. I will give a try. As per the post here
https://groups.google.com/forum/#!msg/beagleboard/aXv6An1xfqI/mURD3LfQ5dMJ?
the power source should have proper rise time. I'm afraid a capacitor will
increase the rise time. Any way I'll give a try.

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Re: [beagleboard] Read from LV-Maxsonar-EZ0 using uart2

[Matthew Witherwax]

As an addendum, the circuit in my post would work at 3.3 V as well.

On Tuesday, November 5, 2013 9:12:14 AM UTC-6, Matthew Witherwax wrote:
>
> I believe my blog post http://blog.lemoneerlabs.com/post/Hearing-aidswill 
> solve your issue.  You need to build an actual inverter (or buy an IC 
> to do it for you).
>
> On Tuesday, November 5, 2013 3:52:54 AM UTC-6, Gustavo Oliveira wrote:
>>
>> I guess I did some mistake answering back there =P
>> It is in UART_RX.
>>
>> I search the internet and found that maybe I'm getting the inverted 
>> messages, all the 1s as 0s and the 0s as 1s.
>>
>>
>> On 5 November 2013 09:50, Gustavo Oliveira  wrote:
>>
>>> 1) I'm using the 3.3V pin, so the voltage is acceptable in p9_22.
>>>
>>> 2) What do you mean by setttings, the fields when I export the pin? Or 
>>> the pin mode? I think mine are ok, what should they be?
>>>
>>> 3) I tried many applications, python scripts, c scripts, minicom...
>>>
>>>
>>> On 5 November 2013 05:26, Maxim Podbereznyy  wrote:
>>>
 1) I would place a voltage translator or a simple voltage divider based 
 on two resistors to reduce 5 volts to the acceptable 3.3V.

 2) check the pinmux settings for that pin

 3) what terminal application do you use to read data? Check the serial 
 port parameters and don't forget to disable the hardware flow control if 
 any
 05 нояб. 2013 г. 3:55 пользователь "Gustavo Oliveira" <
 gustavo@gmail.com> написал:

> Hi, thank you for quick reply,
> I'm using a BeagleBone and Ubuntu 12.04.
>
> I have the TX connected to p9_22, which is uart2 RX.
>
> On Monday, November 4, 2013 7:38:06 PM UTC, lisarden wrote:
>>
>> hi!
>>
>> what board do you use and what OS?
>>
>> your datasheet says that VCC is +5V and the TX pin also work in 0-VCC 
>> range. If you use beaglebone it accepts only 3.3V, however there can be 
>> options
>>
>>
>> 2013/11/4 Gustavo Oliveira 
>>
>>> Hello,
>>> I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface.
>>>
>>> I have connected the wires correctly and I have placed an overlay in 
>>> uart2.
>>> The problem is the data I'm reading from the sensor. I can only get 
>>> garbage, but its not completely wrong because the data changes 
>>> according to 
>>> the distance to obstacle.
>>>
>>> The datasheet for the sensor can be found here: 
>>> datasheet
>>> .
>>>
>>> I searched google for a day and couldn't find anything...
>>> Someone posted in a raspberry pi forum that the problem is the 
>>> meaning of 1s and 0s, but I changed active_low to 1 and I got the same.
>>>
>>> I'm not very proficient with electronics, so I might take some time 
>>> following instructions.
>>> Nonetheless all the help will be welcome.
>>>
>>>  -- 
>>> For more options, visit http://beagleboard.org/discuss
>>> --- 
>>> You received this message because you are subscribed to the Google 
>>> Groups "BeagleBoard" group.
>>> To unsubscribe from this group and stop receiving emails from it, 
>>> send an email to beagleboard...@**googlegroups.com.
>>> For more options, visit 
>>> https://groups.google.com/**groups/opt_out
>>> .
>>>
>>
>>
>>
>> -- 
>> LinkedIn - 
>> http://www.linkedin.com/in/**maximpodbereznyy
>> Company - 
>> http://www.linkedin.com/**company/mentorel
>> Facebook - 
>> https://www.facebook.com/**mentorel.company
>>  
>  -- 
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>>>
>>>
>>

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Re: [beagleboard] Read from LV-Maxsonar-EZ0 using uart2

[Matthew Witherwax]

I believe my blog post http://blog.lemoneerlabs.com/post/Hearing-aids will 
solve your issue.  You need to build an actual inverter (or buy an IC to do 
it for you).

On Tuesday, November 5, 2013 3:52:54 AM UTC-6, Gustavo Oliveira wrote:
>
> I guess I did some mistake answering back there =P
> It is in UART_RX.
>
> I search the internet and found that maybe I'm getting the inverted 
> messages, all the 1s as 0s and the 0s as 1s.
>
>
> On 5 November 2013 09:50, Gustavo Oliveira 
> > wrote:
>
>> 1) I'm using the 3.3V pin, so the voltage is acceptable in p9_22.
>>
>> 2) What do you mean by setttings, the fields when I export the pin? Or 
>> the pin mode? I think mine are ok, what should they be?
>>
>> 3) I tried many applications, python scripts, c scripts, minicom...
>>
>>
>> On 5 November 2013 05:26, Maxim Podbereznyy 
>> > wrote:
>>
>>> 1) I would place a voltage translator or a simple voltage divider based 
>>> on two resistors to reduce 5 volts to the acceptable 3.3V.
>>>
>>> 2) check the pinmux settings for that pin
>>>
>>> 3) what terminal application do you use to read data? Check the serial 
>>> port parameters and don't forget to disable the hardware flow control if any
>>> 05 нояб. 2013 г. 3:55 пользователь "Gustavo Oliveira" <
>>> gustavo@gmail.com > написал:
>>>
 Hi, thank you for quick reply,
 I'm using a BeagleBone and Ubuntu 12.04.

 I have the TX connected to p9_22, which is uart2 RX.

 On Monday, November 4, 2013 7:38:06 PM UTC, lisarden wrote:
>
> hi!
>
> what board do you use and what OS?
>
> your datasheet says that VCC is +5V and the TX pin also work in 0-VCC 
> range. If you use beaglebone it accepts only 3.3V, however there can be 
> options
>
>
> 2013/11/4 Gustavo Oliveira 
>
>> Hello,
>> I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface.
>>
>> I have connected the wires correctly and I have placed an overlay in 
>> uart2.
>> The problem is the data I'm reading from the sensor. I can only get 
>> garbage, but its not completely wrong because the data changes according 
>> to 
>> the distance to obstacle.
>>
>> The datasheet for the sensor can be found here: 
>> datasheet
>> .
>>
>> I searched google for a day and couldn't find anything...
>> Someone posted in a raspberry pi forum that the problem is the 
>> meaning of 1s and 0s, but I changed active_low to 1 and I got the same.
>>
>> I'm not very proficient with electronics, so I might take some time 
>> following instructions.
>> Nonetheless all the help will be welcome.
>>
>>  -- 
>> For more options, visit http://beagleboard.org/discuss
>> --- 
>> You received this message because you are subscribed to the Google 
>> Groups "BeagleBoard" group.
>> To unsubscribe from this group and stop receiving emails from it, 
>> send an email to beagleboard...@**googlegroups.com.
>> For more options, visit 
>> https://groups.google.com/**groups/opt_out
>> .
>>
>
>
>
> -- 
> LinkedIn - 
> http://www.linkedin.com/in/**maximpodbereznyy
> Company - 
> http://www.linkedin.com/**company/mentorel
> Facebook - 
> https://www.facebook.com/**mentorel.company
>  
  -- 
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>>
>>
>

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Re: [beagleboard] laptop doesn't recognize bbb as a storage device

[Robert P. J. Day]

On Tue, 5 Nov 2013, Erdem YILMAZ wrote:

> Hello,
>
> I am a newbie so i'm sorry if this problem is very easy. but i couldn't solve 
> it by myself.
> i got a beaglebone black A5C  a week ago from Farnell 
> when i connect the bbb to laptop the process is like below
>
> 1. power led is on
> 2. four seconds later usr0 is on
> 3. after that usr1 and usr2 are on
> 4. all the usr leds are on
> 5. usr0 is heartbeating
>
> enclosed you can find a file which shows led status when connected.

  with all due respect, are you on crack? posting an 8M file to a
mailing list not once but three times? grow up and and learn some
simple mailing list etiquette.

rday

-- 


Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca

Twitter:   http://twitter.com/rpjday
LinkedIn:   http://ca.linkedin.com/in/rpjday


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[beagleboard] Re: USB transmission speed

[Juanjo]

It seems 3.12 has DMA support enabled for USB (3.8 isn't) so it should be a 
bit better or at least not choke the CPU on interrupts.

Anyway it seems USB isn't the brilliant part of the BBB :(

Maybe the BBW with 3.2 runs faster on USB.

On Saturday, November 2, 2013 12:22:45 PM UTC-3, thoma...@gmail.com wrote:
>
> I'm trying to use the BBB as a (very) lightweight NAS. Unfortunately, I'm 
> a bit disappointed with the transfer speed I can achieve over the USB port. 
> I've now tried different kernels such as Robert C Nelsons 3.8.13-bone28 and 
> 3.12.0-rc5-bone6, different USB storage devices (such as a USB 2.0 flash 
> drive and a USB 3.0 hard disk), and tried both directly attaching the flash 
> drive to the BBB as well as using a powered USB hub. The HD of course only 
> works on the hub. The BBB is running on a 5V external power supply.
>
> Using different tools (hdparm and dd) the USB read speed always maxes out 
> at about 9MB/s which is far less than the same devices deliver on other 
> systems (e.g. about 25MB/s on my Raspberry Pi).
>
> Does anyone have an idea why this is the case or how this can be improved?
>

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[beagleboard] Re: BeagleBone Black PRU IEP timer

[Juanjo]

I think is related to a bug (double interrupt) on the PRUSS userspace 
library provided. Patch was sent many months ago but the maintainer 
(jadonk) hasn't applied. Weird since the repository has movement 4 months 
ago but just cosmetics:

Repository:

https://github.com/beagleboard/am335x_pru_package

Bug report on same repository with patch:

https://github.com/beagleboard/am335x_pru_package/issues/3

On Monday, November 4, 2013 3:10:54 AM UTC-3, dthph...@gmail.com wrote:
>
> Hi everyone, I started using IEP timer a few days ago and I faced with one 
> problem which could not be solved up to now.
> There are parts of my code C and code assembly for PRU.
> The C code:
>  while(1)
> {
>   char filename[100];
>   strcpy(filename, "frame_");
>   sprintf(filename,"%d",number);
>   cout << "Capture" << filename << endl;
> prussdrv_pru_wait_event (PRU_EVTOUT_1);
>   prussdrv_pru_clear_event (PRU1_ARM_INTERRUPT);
>   number++;
> }
>
>  And the assembly code for PRU
>
> #include "PRU_memAccess_DDR_PRUsharedRAM.hp"
> #define CONST_IEP C26
>
> MEMACCESS_DDR_PRUSHAREDRAM:
>
> // Enable OCP master port
> LBCO  r0, CONST_PRUCFG, 4, 4
> CLR r0, r0, 4 // Clear SYSCFG[STANDBY_INIT] to enable OCP 
> master port
> SBCO  r0, CONST_PRUCFG, 4, 4
>
> // *
> // *   Timer Configuration *
> // *
>
> // spruhf8 AM335x PRU-ICSS Reference Guide 10.x
> LBCOr6, CONST_IEP, 0x40, 40 // Read all 10 32-bit 
> CMP registers into r6-r15
> OR  r6, r6, 0x03// Set count reset and 
> enable compare 0 event
>
> // Set loop period to 1S
> MOV r8, 10
>
> SBCOr6, CONST_IEP, 0x40, 40 // Save 10 32-bit CMP 
> registers
>
> MOV r2, 0x0551  // Enable counter, 
> configured to count nS 
>(increments by 5 each clock)
> SBCOr2, CONST_IEP, 0x00, 4  // Save IEP GLOBAL_CFG 
> register
>
> // *
> // *Waiting for timer  *
> // *
>
> WAIT:
> LBCOr2, CONST_IEP, 0x44, 4  // Load CMP_STATUS register
> QBBCWAIT, r2, 0 // Wait until counter times out
> SBCOr2, CONST_IEP, 0x44, 4  // Clear counter timeout bit
>
> // Send notification to Host for program completion
> MOV   r31.b0, PRU1_ARM_INTERRUPT+16
>
> JMP WAIT
> // Halt the processor
> HALT
> The function of this program is to display (Capture+"number") on the 
> screen after 1s. The number is increasing. When I ran this code, the result 
> was: Capture 0  (delay) Capture 1 Capture 2 (delay) Capture 3 Capture 4 
> (delay) ... It means the number is increase by 2 each 1s (I want it to 
> increase by 1). 
> I have tried many different ways but I could not find the solution. I 
> thought that the instruction prussdrv_pru_clear_event 
> (PRU1_ARM_INTERRUPT); in code C need a period of time to clear the 
> interrupt. I tested this idea by adding 1 more  prussdrv_pru_wait_event 
> (PRU_EVTOUT_1); after this. The code was changed to:
> while(1)
> {
>   char filename[100];
>   strcpy(filename, "frame_");
>   sprintf(filename,"%d",number);
>   cout << "Capture" << filename << endl;
> prussdrv_pru_wait_event (PRU_EVTOUT_1);
>   prussdrv_pru_clear_event (PRU1_ARM_INTERRUPT);
>prussdrv_pru_wait_event (PRU_EVTOUT_1);   //Additional 
> instruction
>   number++;
> }
>
> Fotunately, the problem is solved. I don't know how to explain for this. I 
> think that PRU sends another interrupt to main processor when the timer is 
> matched. Can anyone help me to explain this?
>
> Best regards,
> Phong
>

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Re: [beagleboard] Re: BeagleBone Black QT GUI Application

[Maxim Podbereznyy]

http://harmattan-dev.nokia.com/docs/library/html/qt4/qt-embedded-pointer.html

you can also use google sometimes ;)


2013/11/5 

> I used Beaglebone Black without LCD/touchscreen module, just with HDMI out
> to my Monitor.
> When I execute "systemctl disable gdm.service" and "./myQtHelloWorld -qws",
> I can see the window display to my Monitor but the mouse hanged(can not be
> moved).
> Can you give me some suggestions for this issue?
>
>
> lisarden於 2013年10月13日星期日UTC+8上午10時46分45秒寫道：
>>
>> Disable gdm at all
>> 11.10.2013 20:39 пользователь "MCU Solution"  написал:
>>
>>> when i use the command "pkill gdm" then run my application , its
>>> running. but Mouse operation nill. how can i run the button like graphic
>>> application without using the command pkill gdm
>>>
>>> any idea ??
>>>
>>> On Friday, October 11, 2013 9:05:31 PM UTC+5:30, MCU Solution wrote:

 Yes i have it.

 On Friday, October 11, 2013 10:10:23 AM UTC+5:30, MCU Solution wrote:
>
> is it possible to run QT GUI Application on Beaglebone Black with HDMI
> Output?
>
> i try the QT GUI Example ,No Output in the Monitor .but i try hello
> world in the terminal  its show hello world but i try GUI application
> example like Buttons ,not shown any Output.
>
> Any Help?
>
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[beagleboard] Re: CAUTION: musb: Babble Interrupt Occurred

[Juanjo]

In my case I have a cape that connects via USB (besides the usual headers). 
And I have a TP on VBUS, sometimes just inserting a tester on the test 
point generates a Babble Interrupt.

Mine isn't properly grounded.

You can always check the governor and cpu frequency with:

juanjo@balin:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
ondemand
juanjo@balin:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
30

On Monday, November 4, 2013 12:12:53 PM UTC-3, Philippe Laurent wrote:
>
> A few more updates. I've read in a number of other locations that this 
> might be due to a grounding issue or a power draw issue. Starting with 
> tackling the power draw issue, it appears that the system bus outputs 
> different power to the USB device depending on its CPU throttling status. 
> The lower the CPU speed, the (slightly) lower the USB output.
>
> Still using Ubuntu 13.04, I've removed both the S99ondemand startup script 
> from the rc2.d folder, as well as placed the line "
>
> echo 'on' | tee /sys/bus/usb/devices/usb1/power/control" in the 
> /etc/rc.local script (no quotes) to try and mitigate the issue. The former, 
> from what I understand, keeps the CPU running at full speed, and does not 
> let it slow down based on demand, the latter works to keep USB power on to 
> the port at all times, rather than letting the BBB decide whether to power 
> it off/on.
>
> At this point, the BBB has not thrown any more Babble errors through 
> multiple power off/on events, nor through any extensive scanning or quiet 
> time.
>
> Of note, there may also be some merit in the grounding issue, as walking 
> across the floor and then touching the BBB case will occasionally cause the 
> Babble issue to appear and the Symbol device to power off. The device is 
> connected to a DC power supply, but there is no grounding plug with the 
> brick, so it stands to reason that the device is not grounded.
>
> Hope this helps someone... although I'm sure that at this point I have no 
> concrete solutions to the problem.
>
> On Saturday, November 2, 2013 12:32:03 PM UTC-4, Philippe Laurent wrote:
>>
>> Crap. On third reboot (full power off/on), the device is experiencing 
>> the same musb: Babble Interrupt error as before.
>>
>> So... this is a hardware issue? The BBB is powered by a separate adapter 
>> (not USB), so power shouldn't be the problem.
>>
>> On Friday, November 1, 2013 1:13:09 PM UTC-4, Philippe Laurent wrote:
>>>
>>> I resolved my issue by installing and using Ubuntu 13.04 on the BBB. 
>>> It's been up and running the python scanning script for over 24 hours, 
>>> which is roughly 23 hours longer than it has before. I used the 
>>> instructions at 
>>> http://shrkey.com/setting-up-beaglebone-black-to-boot-off-the-microsd-card/to
>>>  get the installation squared away.
>>>
>>> On Wednesday, October 30, 2013 9:51:30 AM UTC-4, Bekir Bahadir wrote:

 Same problem here. Im also willing to pay for a solution

 Am Samstag, 31. August 2013 17:42:09 UTC+2 schrieb jez...@gmail.com:
>
> I'm using my Beaglebone Black with a USB temperature sensor. It works 
> very well, however I noticed monitoring stopped last night after roughly 
> 35 
> days uptime. This morning I looked more closely into the log file and 
> noticed:
>
> kernel: [2892926.929555] CAUTION: musb: Babble Interrupt Occurred
>
> I wasn't able to successfully reset the USB device and before I was 
> able to restart the BBB stopped responding. I power-cycled it and it was 
> back to normal again. Any ideas what caused this kernel message?
>


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Re: [beagleboard] Need support in compiling ubuntu for BBB

[Robert Nelson]

On Mon, Nov 4, 2013 at 10:39 PM, vinayak aghor  wrote:
> Hello,
> I want to compile OS ubuntu for BBB.
>
> I am referring http://eewiki.net/display/linuxonarm/BeagleBone+Black
>
> In downloaded linux-dev-am33x-v3.12 in home directory. Then ran script
> ./build_kernel.sh
>
> It initially downloaded cross-compiler toolchain (around 48MB) and did set
> the CC, which is expected.
> debug:
> CC=/home/vinayak/linux-dev-am33x-v3.12/dl/gcc-linaro-arm-linux-gnueabihf-4.8-2013.09_linux/bin/arm-linux-gnueabihf-
>
> Then it tried to download linux directory
>
> scripts/git: LINUX_GIT not defined in system.sh
> cloning git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> into default location: /home/vinayak/linux-dev-am33x-v3.12/ignore/linux-src
> Cloning into '/home/vinayak/linux-dev-am33x-v3.12/ignore/linux-src'...
> remote: Counting objects: 3239961, done.
> remote: Compressing objects: 100% (486062/486062), done.
> ^Cceiving objects:   0% (1535/3239961), 836.00 KiB | 50 KiB/s
>
> After downloading complete (around 650MB), got message as - Resolving deltas
>
> Now internet connection lost. Again ran script ./build_kernel.sh

Did the "clone" finish before the network was lost?

>
> Now script again downloading 650MB data, which is not expected. In the
> previous run, it has downloaded the same data & again downloading. There
> should be some catch in this.

the bash logic is as follows...
https://github.com/RobertCNelson/stable-kernel/blob/master/scripts/git.sh#L62


>
> How to permanently fix this? How to download LINUX_GIT permanently. so,again
> will not download same file

You could always "clone"
"git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git"
anywhere in your system, just set the LINUX_GIT variable to the
directory to where you cloned it.. If you mess up the logic, will just
re-clone it to the 'ignore/linux-src' directory...

Regards,

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

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Re: [beagleboard] Re: BeagleBone Black QT GUI Application

[barnett6723]

I used Beaglebone Black without LCD/touchscreen module, just with HDMI out 
to my Monitor.
When I execute "systemctl disable gdm.service" and "./myQtHelloWorld -qws",
I can see the window display to my Monitor but the mouse hanged(can not be 
moved).
Can you give me some suggestions for this issue?


lisarden於 2013年10月13日星期日UTC+8上午10時46分45秒寫道：
>
> Disable gdm at all
> 11.10.2013 20:39 пользователь "MCU Solution" > 
> написал:
>
>> when i use the command "pkill gdm" then run my application , its running. 
>> but Mouse operation nill. how can i run the button like graphic application 
>> without using the command pkill gdm
>>
>> any idea ??
>>
>> On Friday, October 11, 2013 9:05:31 PM UTC+5:30, MCU Solution wrote:
>>>
>>> Yes i have it.
>>>
>>> On Friday, October 11, 2013 10:10:23 AM UTC+5:30, MCU Solution wrote:

 is it possible to run QT GUI Application on Beaglebone Black with HDMI 
 Output?

 i try the QT GUI Example ,No Output in the Monitor .but i try hello 
 world in the terminal  its show hello world but i try GUI application 
 example like Buttons ,not shown any Output.

 Any Help?

>>>  -- 
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>

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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[Wilfredo Nieves]

Cap = capacitor. Just make sure that it is the right size for where you put
it in your circuit. If it is too small i can explode and possibly start a
fire. In your original post you stated that you have a 24V to 5V step down,
so if you place it before the step down make sure it is at least rated for
24V or if you place it after it has to be at least 5V. You may also
consider a voltage monitor circuit to safely power down your BBB to avoid
corrupting the file system.

-Wil


On Nov 5, 2013 6:49 AM, "neckTwi"  wrote:

> cap? is it some electronic circuitry? I donno much abt electronic circuits
> but i can solder few resistors, capacitors and diods on a board. Any help
> is a gr8 favour..
> Thank you.
>
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Re: [beagleboard] Re: cloud9 bonescript interrupt problems

[grehuku]

Hi!!! I have updated my board with the latest bonescript but I'm still 
having the same problem. The attachInterrupt only fires once and that's it, 
I'm running the code using Cloud9.
How ever when I use the attachInterrupt demo; 

http://192.168.7.2/Support/BoneScript/attachInterrupt/ 

It works. Is it still an issue with bonescript or with Cloud9.

Urgently need help with this issue...

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[beagleboard] Re: Where i can purchase beagleboard in india?

[sales . sumeet]

Hi All, 
Beaglebone Black is available in India at SUMEET ESHOP 
http://shop.sumeetinstruments.com/
Authorized distributor for Beagleboard in India.

You will also find here other brands as well - Arduino, Digilent, Hitec, 
Parallax, Sparkfun, Raspberry etc
Single source for all your project needs.

Regards,


On Monday, 14 June 2010 10:23:38 UTC+5:30, beable0920 m wrote:
>
> Hi all,
>   IDA systems has no stock of boards. From anywhere else can i try?
>
> Regards,
> sunny.
>

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Re: [beagleboard] Re: Newbie - Difference in Ti-sdk and Angstorm

[barnett6723]

Hi Jody,

I also used Beaglebone Black without LCD/touchscreen module, just with HDMI 
out to my Monitor.
You can try to execute "systemctl disable gdm.service" and 
"./myQtHelloWorld -qws"

But in my BBB, I can see the window display to my Monitor but the mouse 
hanged(can not be moved).


Jody Baudoin於 2013年9月1日星期日UTC+8上午5時03分21秒寫道：
>
>  I only get console debug messages that I put in main.  cout << or 
> printf(), not sure which I used.
> I was not sure it was even running, so I put the messages in.
>
> It would have been nice if QT could have printed out some error messages 
> instead of running silently.
>
> QT acts like it is happy - I just do not see any graphics.
>
> Thanks,
> Jody
>
>
> On 8/31/2013 00:20, Nilesh Pardesi wrote:
>  
>  hi jody,
>>
>  
>
>>  can you please provide details what console debug massages you are 
>> getting ? 
>>
>>   -- 
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>
>
> 

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[beagleboard] Re: QT runs BUT no graphics output (text output to command windows only)

[barnett6723]

I used Beaglebone Black without LCD/touchscreen module, just with HDMI out 
to my Monitor.
You can try to execute 
"systemctl disable gdm.service" 
and 
"./myQtHelloWorld -qws", 
I can see the window display to my Monitor
but the mouse hanged(can not be moved).


Jody Baudoin於 2013年8月21日星期三UTC+8下午9時53分48秒寫道：
>
>  Greetings everyone.
>
> The program runs, but produces no graphical output.
> The program does produce "cout" output.
> The program does not return from the app.exec() call.
> The build steps & the main.cpp file are included below.
>
>
> I built a QT application using this sequence on Linux Mint:
>
> . /usr/local/angstrom/arm/environment-setup
> qmake qte-example.pro
> make
>
> Used sftp to copy the file to the beagleBone Black desktop.
>
>
> Beaglebone Black "Terminal".  Angstron, with a GUI running on HDMI 
> monitor, keyboard & moust.
> //Installation of qt on the beagleBone was as follows:
> //  opkg update
> //  opkg install qt4-embedded --force-depends
> // REM - I am concerned about the need for --force-depends as I do not 
> understand why it would not work without it.
>
> ./qte-example -qws
>   hello world
>   right before return
>
>
> main.cpp file:
>
> int main(int argc, char** argv) 
> {
> cout << "hello world" << endl;
>
> QApplication app(argc, argv);
> QPushButton helloButton("Hello World");
> helloButton.resize(80, 20);
> helloButton.show();
>
> cout << "right before return" << endl;
>
> return app.exec();
>
> cout << "right after return" << endl;
> }
>
>
>
>
> Can someone give me a hint or link to a check list?
> My guess is that the application cannot access the graphics output.
> Or, maybe the libraries on Mint & BeagleBone do not match.
>
> Thanks,
> Jody
>  

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[beagleboard] Re: Sleep Mode / Power Saving Mode of BeagleBone Black

[mtariquesaleem]

Have you tried "*echo mem* *>* */sys/power/state" *to enter into 'mem' 
state?

On Thursday, 31 October 2013 10:26:03 UTC+5, rameez...@wavetec.co wrote:
>
> Hi,
>
> I have a BeagleBone Black with Ubuntu Precise 12.04.2 LTS running on it 
> from a micro-SD card. I want to put my BeagleBone Black in sleep mode (or 
> power saving mode). When I press the "power button" (for a small duration) 
> nothing happens, but when I press the power button for more than 8sec, the 
> board completely shuts down. 
>
> Is there any way to put the beaglebone black on power saving mode, (maybe 
> using a power button or using some command from command line). The 
> beaglebone consumes around 0.24A on normal running (I am not using HDMI 
> output, just using SSH). I want to put the board in sleep/power saving 
> mode, so that the current consumption become less than 10mA. Is it possible?
>
> Regards,
> Rameez Qasim.
>

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Re: [beagleboard] Re: BeagleBone Black QT GUI Application

[Help]

I have the same issue as "MCU Solution" in My BBB (just HDMI-out to 
Monitor, no LCD/touchseen).
I used "systemctl disable gdm.service" and execute "./myQt -qws".
And then I can see my Qt but mouse can't be worked/moved.
Anybody can help me ?

lisarden於 2013年10月13日星期日UTC+8上午10時46分45秒寫道：
>
> Disable gdm at all
> 11.10.2013 20:39 пользователь "MCU Solution" > 
> написал:
>
>> when i use the command "pkill gdm" then run my application , its running. 
>> but Mouse operation nill. how can i run the button like graphic application 
>> without using the command pkill gdm
>>
>> any idea ??
>>
>> On Friday, October 11, 2013 9:05:31 PM UTC+5:30, MCU Solution wrote:
>>>
>>> Yes i have it.
>>>
>>> On Friday, October 11, 2013 10:10:23 AM UTC+5:30, MCU Solution wrote:

 is it possible to run QT GUI Application on Beaglebone Black with HDMI 
 Output?

 i try the QT GUI Example ,No Output in the Monitor .but i try hello 
 world in the terminal  its show hello world but i try GUI application 
 example like Buttons ,not shown any Output.

 Any Help?

>>>  -- 
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>>
>

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[beagleboard] Re: Sleep Mode / Power Saving Mode of BeagleBone Black

[naveedhd]

In my humble opinion, the power button generates an interrupt in software 
and you can write few lines of code to put the bbb in sleep mode as well as 
other peripherals you may want to shut off before going to sleep.

Hope that helps

On Thursday, 31 October 2013 10:26:03 UTC+5, rameez...@wavetec.co wrote:
>
> Hi,
>
> I have a BeagleBone Black with Ubuntu Precise 12.04.2 LTS running on it 
> from a micro-SD card. I want to put my BeagleBone Black in sleep mode (or 
> power saving mode). When I press the "power button" (for a small duration) 
> nothing happens, but when I press the power button for more than 8sec, the 
> board completely shuts down. 
>
> Is there any way to put the beaglebone black on power saving mode, (maybe 
> using a power button or using some command from command line). The 
> beaglebone consumes around 0.24A on normal running (I am not using HDMI 
> output, just using SSH). I want to put the board in sleep/power saving 
> mode, so that the current consumption become less than 10mA. Is it possible?
>
> Regards,
> Rameez Qasim.
>

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[beagleboard] Enable ADC via uEnv.txt not make *AIN* and not sure via cpp

[terra ÜÝÜ]

Dear People,

I have a beagle-bone black, on a default angstrom distribution 
(BBB-eMMC-flasher-2013.09.04).
I have modified uEnv.txt to reflect the disabling of HDMI and enabling the 
ADC (this is on 1 line)

optargs=quiet drm.debug=7 quiet 
capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN 
capemgr.enable_partno=BB-ADC

output of 
find /sys -name AIN\* not find any analog inputs, but a cat of 

cat /sys/devices/bone_capemgr.*/slots

shows that HDMI is disabled and ADC is enabled. 
 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
 5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
 6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN
 7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-ADC

via c++, I am not sure how to enable the command,
system("echo BB-ADC > /sys/devices/bone_capemgr.\"*\"/slots");

however a type specific loading does work, but my understanding the number 
can change based on loading order.
system("echo BB-ADC > /sys/devices/bone_capemgr.8/slots");

Help would be greatly appreciated, as I need this to be a standalone system 
with self boot configuration.

Warm Regards,
R3L4X5.

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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[neckTwi]

cap? is it some electronic circuitry? I donno much abt electronic circuits 
but i can solder few resistors, capacitors and diods on a board. Any help 
is a gr8 favour..
Thank you.

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Re: [beagleboard] Need support in compiling ubuntu for BBB

[Nuno Sucena Almeida]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 11/04/2013 11:39 PM, vinayak aghor wrote:
> How to download LINUX_GIT permanently. 

As per the doc kindly provided by Robert, you can git clone Linus kernel
repository manually and set LINUX_GIT to that location. If kernel.org is
too slow and aborts, you might want to use the google provided mirror:

https://kernel.googlesource.com/

https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git

regards,
Nuno

- -- 
http://aeminium.org/nuno/
-BEGIN PGP SIGNATURE-
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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[Wilfredo Nieves]

Ok so why not add a cap to the circuit to keep it powered while you start
the car.
On Nov 5, 2013 6:34 AM, "neckTwi"  wrote:

> Ya I got that! But I am looking for some aiding reactive circuits or some
> magical software fix!
>
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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[neckTwi]

Ya I got that! But I am looking for some aiding reactive circuits or some 
magical software fix!

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Re: [beagleboard] beagleboneblack don't restart after power fluctuation.

[Wilfredo Nieves]

The reason it powers off is because your ignition switch is not providing
constant power when you turn the key to start. I would try to find a power
source that has power when key is set to on and start.
On Nov 5, 2013 6:21 AM, "neckTwi"  wrote:

> I've connected beagleboneblack to my car power supply with 24V to 5V step
> down. when I power on my car the BBB starts but when I ignite the engine
> BBB stops running and don reboot though the power led is on. Can I fix it
> with software change mentioned at
> https://groups.google.com/forum/#!msg/beagleboard/aXv6An1xfqI/mURD3LfQ5dMJ
> ?
>
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[beagleboard] beagleboneblack don't restart after power fluctuation.

[neckTwi]

I've connected beagleboneblack to my car power supply with 24V to 5V step 
down. when I power on my car the BBB starts but when I ignite the engine 
BBB stops running and don reboot though the power led is on. Can I fix it 
with software change mentioned at 
https://groups.google.com/forum/#!msg/beagleboard/aXv6An1xfqI/mURD3LfQ5dMJ?

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Re: [beagleboard] Read from LV-Maxsonar-EZ0 using uart2

[Gustavo Oliveira]

I guess I did some mistake answering back there =P
It is in UART_RX.

I search the internet and found that maybe I'm getting the inverted
messages, all the 1s as 0s and the 0s as 1s.


On 5 November 2013 09:50, Gustavo Oliveira wrote:

> 1) I'm using the 3.3V pin, so the voltage is acceptable in p9_22.
>
> 2) What do you mean by setttings, the fields when I export the pin? Or the
> pin mode? I think mine are ok, what should they be?
>
> 3) I tried many applications, python scripts, c scripts, minicom...
>
>
> On 5 November 2013 05:26, Maxim Podbereznyy  wrote:
>
>> 1) I would place a voltage translator or a simple voltage divider based
>> on two resistors to reduce 5 volts to the acceptable 3.3V.
>>
>> 2) check the pinmux settings for that pin
>>
>> 3) what terminal application do you use to read data? Check the serial
>> port parameters and don't forget to disable the hardware flow control if any
>> 05 нояб. 2013 г. 3:55 пользователь "Gustavo Oliveira" <
>> gustavo.pinho...@gmail.com> написал:
>>
>>> Hi, thank you for quick reply,
>>> I'm using a BeagleBone and Ubuntu 12.04.
>>>
>>> I have the TX connected to p9_22, which is uart2 RX.
>>>
>>> On Monday, November 4, 2013 7:38:06 PM UTC, lisarden wrote:

 hi!

 what board do you use and what OS?

 your datasheet says that VCC is +5V and the TX pin also work in 0-VCC
 range. If you use beaglebone it accepts only 3.3V, however there can be
 options


 2013/11/4 Gustavo Oliveira 

> Hello,
> I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface.
>
> I have connected the wires correctly and I have placed an overlay in
> uart2.
> The problem is the data I'm reading from the sensor. I can only get
> garbage, but its not completely wrong because the data changes according 
> to
> the distance to obstacle.
>
> The datasheet for the sensor can be found here: 
> datasheet
> .
>
> I searched google for a day and couldn't find anything...
> Someone posted in a raspberry pi forum that the problem is the meaning
> of 1s and 0s, but I changed active_low to 1 and I got the same.
>
> I'm not very proficient with electronics, so I might take some time
> following instructions.
> Nonetheless all the help will be welcome.
>
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 --
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 Company - http://www.linkedin.com/company/mentorel
 Facebook - https://www.facebook.com/mentorel.company

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Re: [beagleboard] Read from LV-Maxsonar-EZ0 using uart2

[Gustavo Oliveira]

1) I'm using the 3.3V pin, so the voltage is acceptable in p9_22.

2) What do you mean by setttings, the fields when I export the pin? Or the
pin mode? I think mine are ok, what should they be?

3) I tried many applications, python scripts, c scripts, minicom...


On 5 November 2013 05:26, Maxim Podbereznyy  wrote:

> 1) I would place a voltage translator or a simple voltage divider based on
> two resistors to reduce 5 volts to the acceptable 3.3V.
>
> 2) check the pinmux settings for that pin
>
> 3) what terminal application do you use to read data? Check the serial
> port parameters and don't forget to disable the hardware flow control if any
> 05 нояб. 2013 г. 3:55 пользователь "Gustavo Oliveira" <
> gustavo.pinho...@gmail.com> написал:
>
>> Hi, thank you for quick reply,
>> I'm using a BeagleBone and Ubuntu 12.04.
>>
>> I have the TX connected to p9_22, which is uart2 RX.
>>
>> On Monday, November 4, 2013 7:38:06 PM UTC, lisarden wrote:
>>>
>>> hi!
>>>
>>> what board do you use and what OS?
>>>
>>> your datasheet says that VCC is +5V and the TX pin also work in 0-VCC
>>> range. If you use beaglebone it accepts only 3.3V, however there can be
>>> options
>>>
>>>
>>> 2013/11/4 Gustavo Oliveira 
>>>
 Hello,
 I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface.

 I have connected the wires correctly and I have placed an overlay in
 uart2.
 The problem is the data I'm reading from the sensor. I can only get
 garbage, but its not completely wrong because the data changes according to
 the distance to obstacle.

 The datasheet for the sensor can be found here: 
 datasheet
 .

 I searched google for a day and couldn't find anything...
 Someone posted in a raspberry pi forum that the problem is the meaning
 of 1s and 0s, but I changed active_low to 1 and I got the same.

 I'm not very proficient with electronics, so I might take some time
 following instructions.
 Nonetheless all the help will be welcome.

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>>>
>>>
>>>
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>>> Company - http://www.linkedin.com/company/mentorel
>>> Facebook - https://www.facebook.com/mentorel.company
>>>
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[beagleboard] Help executing bitbkae Error

[서재필]

I'm using beagleboardXM on angstrom. And i'm trying to run servodrive 
following this site.
 
https://github.com/tallakt/servodrive
 
So, I finished to install bitbake. But when I run bitbake I got some these 
error
 
ERROR: Unable to determine endianness for architecture 'armv7l'
ERROR: Error in executing: 
/home/root/OEBASE/openembedded/recipes/htmldoc/htmldoc_1.8.27.bb
ERROR: Exception: Message:1
ERROR: Printing the environment of the function
 
I couldn't fix these error.
 
what am I wrong?
 
I edited local.conf file like
 
DL_DIR = "/home/root/OEBASE/sources"
BBFILES :="/home/root/OEBASE/openembedded/recipes/*/*.bb"
MACHINE = "beagleboard"
DISTRO = "angstrom-2008.1"
 
And nothing I changed. 
 
Please help me and give me some advices.
 
I'm trying to solving these error for a day but I couldn't
 
Thanks.

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Re: [beagleboard] Re: UBIFS/U-Boot and UBIFS/Linux not compatible

[matti kaasinen]

Wrong date: should be 2013-09-10 instead of 2013-09-06.
-Matti
2013/11/5 matti kaasinen 

> Hi Tom,
> I'm terribly sorry annoying you for once more time with this issue. I have
> tried to figure out what patch sets you are suggesting below.
> 2013/11/2 
>
> I think that at least part of the answer is that you need to enable
>> CONFIG_SYS_NAND_ONFI_DETECTION.  You may also need to apply some of
>> Pekon's patches from http://patchwork.ozlabs.org/
>> project/uboot/list/?submitter=17320&state=* (there are 3 series there as
>> of this writing, 2 v2's and a v8, you should apply all 3 series, and in the
>> right order, saving each series to an mbox, and using git am -3 / git am
>> --abort when they fail should help get the right order sorted out quickly).
>>
>
> So, to make it clear as crystal even for me, let's list what I found
> matching with your message:
> 2013-08-14
> [U-Boot,v2,1/4] mtd: nand: omap: enable BCH ECC scheme using ELM for
> generic platform
> [U-Boot,v2,2/4] mtd: nand: omap: optimize chip->ecc.hwctl() for H/W ECC
> schemes
> [U-Boot,v2,3/4] mtd: nand: omap: optimize chip->ecc.calculate() for H/W
> ECC schemes
> [U-Boot,v2,4/4] mtd: nand: omap: optimized chip->ecc.correct() for H/W ECC
> schemes
>
> 2013-09-06
> [U-Boot,v2,1/3] am33xx: elm: add support for BCH16_ECC - ELM driver updates
> [U-Boot,v2,2/3] mtd: nand: omap: add support for BCH16_ECC - NAND driver
> updates
> [U-Boot,v2,3/3] am335x: update README for BCH16
>
> 2013-09-30
> [U-Boot,v2,1/4] mtd: nand: add NAND_BUSWIDTH_AUTO to autodetect bus width
> [U-Boot,v2,2/4] am33xx: add CONFIG_SYS_NAND_DEVICE_WIDTH to determine NAND
> device bus-width
> [U-Boot,v2,3/4] am335x: fix GPMC config for NAND and NOR SPL boot
> [U-Boot,v2,4/4] am33xx: add support for beaglebone x16 NAND cape
>
> 2013-10-10
> [U-Boot,v8,1/5] mtd: nand: omap: enable BCH ECC scheme using ELM for
> generic platform
> [U-Boot,v8,2/5] mtd: nand: omap: optimize chip->ecc.hwctl() for H/W ECC
> schemes
> [U-Boot,v8,3/5] mtd: nand: omap: optimize chip->ecc.calculate() for H/W
> ECC schemes
> [U-Boot,v8,4/5] mtd: nand: omap: optimized chip->ecc.correct() for H/W ECC
> schemes
> [U-Boot,v8,5/5] board/ti/am335x/README: update for NAND boot
>
> It seems to me that 2013-08-14 and 2013-10-10 are providing (more or less)
> same patch set
> => My choice is 2013-10-10
> 2013-09-06 and 2013-09-30 seem different to me
> => these are the 2v2's your mentioned above
>
> My guess for patching order would be:
> 1) 2013-10-10
> 2) 2013-09-06
> 3) 2013-09-30
>

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Re: [beagleboard] Re: UBIFS/U-Boot and UBIFS/Linux not compatible

[matti kaasinen]

Hi Tom,
I'm terribly sorry annoying you for once more time with this issue. I have
tried to figure out what patch sets you are suggesting below.
2013/11/2 

> I think that at least part of the answer is that you need to enable
> CONFIG_SYS_NAND_ONFI_DETECTION.  You may also need to apply some of
> Pekon's patches from http://patchwork.ozlabs.org/
> project/uboot/list/?submitter=17320&state=* (there are 3 series there as
> of this writing, 2 v2's and a v8, you should apply all 3 series, and in the
> right order, saving each series to an mbox, and using git am -3 / git am
> --abort when they fail should help get the right order sorted out quickly).
>

So, to make it clear as crystal even for me, let's list what I found
matching with your message:
2013-08-14
[U-Boot,v2,1/4] mtd: nand: omap: enable BCH ECC scheme using ELM for
generic platform
[U-Boot,v2,2/4] mtd: nand: omap: optimize chip->ecc.hwctl() for H/W ECC
schemes
[U-Boot,v2,3/4] mtd: nand: omap: optimize chip->ecc.calculate() for H/W ECC
schemes
[U-Boot,v2,4/4] mtd: nand: omap: optimized chip->ecc.correct() for H/W ECC
schemes

2013-09-06
[U-Boot,v2,1/3] am33xx: elm: add support for BCH16_ECC - ELM driver updates
[U-Boot,v2,2/3] mtd: nand: omap: add support for BCH16_ECC - NAND driver
updates
[U-Boot,v2,3/3] am335x: update README for BCH16

2013-09-30
[U-Boot,v2,1/4] mtd: nand: add NAND_BUSWIDTH_AUTO to autodetect bus width
[U-Boot,v2,2/4] am33xx: add CONFIG_SYS_NAND_DEVICE_WIDTH to determine NAND
device bus-width
[U-Boot,v2,3/4] am335x: fix GPMC config for NAND and NOR SPL boot
[U-Boot,v2,4/4] am33xx: add support for beaglebone x16 NAND cape

2013-10-10
[U-Boot,v8,1/5] mtd: nand: omap: enable BCH ECC scheme using ELM for
generic platform
[U-Boot,v8,2/5] mtd: nand: omap: optimize chip->ecc.hwctl() for H/W ECC
schemes
[U-Boot,v8,3/5] mtd: nand: omap: optimize chip->ecc.calculate() for H/W ECC
schemes
[U-Boot,v8,4/5] mtd: nand: omap: optimized chip->ecc.correct() for H/W ECC
schemes
[U-Boot,v8,5/5] board/ti/am335x/README: update for NAND boot

It seems to me that 2013-08-14 and 2013-10-10 are providing (more or less)
same patch set
=> My choice is 2013-10-10
2013-09-06 and 2013-09-30 seem different to me
=> these are the 2v2's your mentioned above

My guess for patching order would be:
1) 2013-10-10
2) 2013-09-06
3) 2013-09-30
-Matti

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