Re: [beagleboard] P9-17，18 no output.

[Robert Nelson]

On Sun, Sep 4, 2016 at 6:17 PM, yinke65 via BeagleBoard
 wrote:
> I connected P9_17, 18 (i2c-0's SCL, SDA) to an oscilloscope. When I launch
> command "i2cdump -f -y 0 0x70", I could get response correctly. But I can't
> see the waveform on the oscilloscope. Can any expert give me a hint?
> Thanks.

P9_17/P9_18 are i2c1_scl/sda...

sudo sh -c "echo 'BB-I2C1' > /sys/devices/platform/bone_capemgr/slots"

then:

i2cdump -f -y 1 0x70

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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[beagleboard] P9-17，18 no output.

[yinke65 via BeagleBoard]

I connected P9_17, 18 (i2c-0's SCL, SDA) to an oscilloscope. When I launch 
command "i2cdump -f -y 0 0x70", I could get response correctly. But I can't 
see the waveform on the oscilloscope. Can any expert give me a hint?
Thanks.

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[beagleboard] Re: Welcome the Fall 2014 Beagle Class to the group

[Austin Yates]

Really looking forward to this class, Dr. Yoder.

And Hi to the rest of the community!

On Tuesday, August 30, 2016 at 9:57:14 AM UTC-4, Mark A. Yoder wrote:
>
> The purpose of this posting is to announce that I'm once again teaching 
> an Embedded Linux class based on the BeagleBone Black [1].  I'm 
> teaching as open-source as I can and have have posted many of course 
> materials on eLinux.org [2] and github[3].
>
> I'm always open to ideas on what topics to include in the class and 
> suggestions for interesting course projects.  For example we are starting
> BoneScript today and hope to be writing simple kernel module 5 weeks from 
> now.
>
> Class, please respond to this posting.  Others, please welcome my class.
>
> --Mark 
>
> --Prof. Mark A. Yoder 
>   Rose-Hulman Institute of Technology [4] 
>
> [1] http://elinux.org/Embedded_Linux,_Rose-Hulman 
> [2] http://elinux.org/index.php?title=Category:ECE497 
> [3] https://github.com/MarkAYoder/BeagleBoard-exercises 
> [4]  http://www.rose-hulman.edu 
>

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Re: [beagleboard] Re: chipsee beaglebone lcd/dvi expansion kernel support

['martin elton' via BeagleBoard]

I just got back around to the beaglebone black.  I have ubuntu 12.04 
working with desktop and touch.  Just have to get the Chipsee 7" lcd's 
speaker working.


On Thursday, March 26, 2015 at 10:36:45 AM UTC-4, pmh...@gmail.com wrote:
>
> Martin, 
> Did you get it working? I am interested in loading debian on it just as 
> you.  I am new to the linux community and have benging my head against the 
> wall for over a week with this.  I partitioned a blank sd card to an 
> acceptable beaglebone format, otherwise the sd is automatically labled 
> /dev/mmcblkXXX  When I attempt to run the mksdcard.sh and reference the 
> appropriately partitioned SD card, the mksdcard script runs, (displays 
> warning box) but fails immediately.  If you can assist in any way or send a 
> link to your dropbox that would be greatly appreciated!
> -Patrick
>
>

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Re: [beagleboard] Re: chipsee beaglebone lcd/dvi expansion kernel support

['martin elton' via BeagleBoard]

I just got back around to the beagle bone black, been playing with a Pi3. 
 Anyways, I have ubuntu 12.04 up and running with ubuntu desktop and touch 
screen.  The next step is getting the Chipsee 7" lcd speaker working.

On Thursday, March 26, 2015 at 11:32:49 AM UTC-4, Mahammad Mostafa wrote:
>
> Hi Martin, I had it working more than a year ago with the LCD and touch 
> drivers I extracted from the 2013 DVD.  I cocked a customized image because 
> there was no debian at that time. I did not check the latest DVD but I know 
> it got debian and several other flavors. If your DVD dose not have it then 
> I think chipsee customers support should be able to share it with you I 
> think. They are very friendly.
>
> Regarding the mkcard scripts.. I doubt the partition is auto mounted. And 
> device writing apps cant go with mounted partitions. 
>
> On Thu, Mar 26, 2015 at 4:23 PM,  wrote:
>
>> Martin, 
>> Did you get it working? I am interested in loading debian on it just as 
>> you.  I am new to the linux community and have benging my head against the 
>> wall for over a week with this.  I partitioned a blank sd card to an 
>> acceptable beaglebone format, otherwise the sd is automatically labled 
>> /dev/mmcblkXXX  When I attempt to run the mksdcard.sh and reference the 
>> appropriately partitioned SD card, the mksdcard script runs, (displays 
>> warning box) but fails immediately.  If you can assist in any way or send a 
>> link to your dropbox that would be greatly appreciated!
>> -Patrick
>>
>>
>> On Monday, December 8, 2014 at 10:30:23 PM UTC-5, martin elton wrote:
>>>
>>> Bill,
>>> I tried your advice and the .sh file doesn't fun.  I am using Debian and 
>>> the cpu monitor usage runs at 100% when I do this.  But it fails to write 
>>> anything to the sd card.  After some back and forth with chipsee customer 
>>> support, I received a message to update a line from 
>>> --device) shift; device=$1; shift; ;;
>>>  to 
>>> --device) shift; device=$1p; shift; ;;
>>>
>>> I am not that familiar with linux as one can tell, but it seems the 
>>> change just "appends" a p to what ever I type for the device.  I can upload 
>>> a copy of the zip to dropbox or something if anyone wants to look at it.
>>>
>>>
>>>
>>> On Monday, December 8, 2014 10:35:29 AM UTC-5, William Pretty Security 
>>> wrote:

 Hi;

  

 If I understand you correctly, you need to use either “su” or “sudo” 
 but not both.

  

 If you enter:  

 sudo . /mksdcard.sh /dev/sdX

  

 It will prompt you for a password. 

 Just use the password that you used to login.

  

 Bill

  

  

 "No one could make a greater mistake than he who did nothing because he 
 could do only a little."

 "All that is necessary for the triumph of evil is that good men do 
 nothing" Edmond Burke *(1729 - 1797)*

 http://www.packtpub.com/building-a-home-security-
 system-with-beaglebone/book

  

 *From:* beagl...@googlegroups.com [mailto:beagl...@googlegroups.com] 
 *Sent:* Sunday, December 07, 2014 4:00 PM
 *To:* beagl...@googlegroups.com
 *Cc:* xris@googlemail.com
 *Subject:* [beagleboard] Re: chipsee beaglebone lcd/dvi expansion 
 kernel support

  

 Hello all,

 I am new to Beaglebone Black (making the jump from the arduino/chipkit 
 world) and am having some difficulty with this Chipsee 7" capacitive cape. 
  
 I feel I am banging my head against the wall over something simple, but 
 could some one provide a walk through for just getting started with the 
 display.  I have the BBB working to an external display via HDMI, but am 
 not able to get the lcd to work unless I use an existing .img.  I am 
 trying 
 to use one of Chipsee's provided prebuilt images, but am having trouble.

 Chipsee's directions state to use:
 sudo su ./mksdcard.sh /dev/sdX   (X in this instance is a after 
 checking with fdisk -l)

 But I keep getting either no passwd for ./mksdcard.sh.  If I drop the 
 sudo su I get permission denied.  Any help would be very much appreciated.

 Thank you

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[beagleboard] Can't enable service using systemctl: Bad message

[Duncan8410]

Folks

I've written a service (wd.service) which I want to start at boot on my BBB 
(running 3.8.13-bone70).  I can use systemctl to start and stop it using 
the commands

systemctl start wd.service

systemctl stop wd.service

and everything works exactly as planned.  However, when I try and get it to 
load at boot using the command

systemctl enable wd.service

I get the response

'Failed to issue method call: Bad message'

I've scouted asround on the internet for similar error messages and there 
are plenty of examples of 'Failed to issue method call: No such file' 
(which all seem to boil down to overwriting the symlinks used by systemd), 
but nothing referring to 'Bad message'.  It seems as though, for some 
reason, systemctl doesn't understand (or won't accept) 'enable' as a valid 
command, even though it seems that this absoltuely the standard way to get 
services to load at boot.  I've tried all the simple tricks I can think of, 
like renaming it, putting in the explicit path to the unit file, rebooting 
etc but all to no avail.  (Incidentally, I get exactly the same response 
using the 'disable' command).  And there are only so many times you can 
check 'enable' to see if it's spelt correctly.

So now I'm stumped. Anyone have any ideas as to what could be causing this?

Any suggestions welcome,

Thanks

Duncan




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[beagleboard] Re: Build Qt5.5.1 for BBB

[sasak]

It is not working.
it is not usable in roberts debian ubuntu console images (kernel 4.1 with 
sgx driver installed), even installed all nessery lib files.
right now (for simple quick2 program ) I am getting

error while loading shared libraries: libEGLSv2.so.1: cannot open shared 
object file: No such file or directory
try to link 
ln -s libEGLSv2.so libEGLSv2.so.1
but i am right now stuck with 

 error while loading shared libraries: libpng16.so.16: cannot open shared 
object file: No such file or directory

Could someone help me how to solve this please...

Is there builded binaries of Qt for roberts debian minimal images


This is driving me crazy!


Best regards

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[beagleboard] How to troubleshoot crash?

[Jim S]

Running 3.14 ubuntu with  asterisk image latest from 
http://beaglebone-asterisk.raspbx.org/ but support seems to be going away.  
Have added some simple scripts to talking to an Arduino board but think the 
problem is more basic.  Latest image ran ok for about a month but now is 
crashing almost daily.  This is headless and when it crashes I can't access 
it although it may still be running - I'm not sure...  Hardly any 
experience looking at logs, etc.  How do I figure out what is going on and 
how to fix - i.e. where to start?

If the fix is too involved I may just abandon asterisk for now and go with 
a maintained version of ubuntu (which one?) if that's what's needed for a 
stable system.  The other scripts are more important now and I could run 
asterisk on a real PC box.


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Re: [beagleboard] meaning of BeagleBone build names from RCN

[Nuno Gonçalves]

On Wednesday, August 10, 2016 at 7:34:30 PM UTC+1, RobertCNelson wrote:
>
> > barefs (bare file system?) 
> > minifs  (mini file system?) 
> > blank (?) 
>
> Flasher can modify the board eeprom... 
>

Hi Robert,

Could you please explain in more one line why can it modify the board 
eeprom?

Thanks 

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