[beagleboard] Re: BeagleBone Black Overlay: Missing file in newer kernel

[Drew Fustini]

On Wed, Dec 6, 2017 at 12:06 PM, Shivanand Pattanshetti wrote:
> Hi,
>
> I am trying to get encoder input using eQEP on the BBB. I am running the
> Ubuntu 16.04 image downloaded from rcn-ee website.
>
> ubuntu@arm:/sys/firmware/devicetree/base/bone_capemgr$ uname -r
> 4.9.54-ti-r68
> ubuntu@arm:~$ ls -ltr /sys/devices/platform/bone_capemgr
> total 0
> -rw-r--r-- 1 root root 4096 Dec  6 17:29 uevent
> lrwxrwxrwx 1 root root0 Dec  6 17:29 subsystem -> ../../../bus/platform
> drwxr-xr-x 2 root root0 Dec  6 17:30 power
> lrwxrwxrwx 1 root root0 Dec  6 17:30 of_node ->
> ../../../firmware/devicetree/base/bone_capemgr
> -r--r--r-- 1 root root 4096 Dec  6 17:30 modalias
> -rw-r--r-- 1 root root 4096 Dec  6 17:30 driver_override
> lrwxrwxrwx 1 root root0 Dec  6 17:30 driver ->
> ../../../bus/platform/drivers/bone_capemgr
> ubuntu@arm:~$ ls -ltr /sys/firmware/devicetree/base/bone_capemgr/
> total 0
> -r--r--r-- 1 root root 16 Dec  6 17:53 compatible
> -r--r--r-- 1 root root 20 Dec  6 17:53 nvmem-cells
> -r--r--r-- 1 root root  4 Dec  6 17:53 #slots
> -r--r--r-- 1 root root  5 Dec  6 17:53 status
> drwxr-xr-x 4 root root  0 Dec  6 17:53 baseboardmaps
> -r--r--r-- 1 root root 13 Dec  6 17:53 name
> -r--r--r-- 1 root root 34 Dec  6 17:53 nvmem-cell-names
> ubuntu@arm:~$ cat /sys/firmware/devicetree/base/bone_capemgr/#slots
> �ubuntu@arm:~$
>
>
> I tried following the readme on
> https://github.com/beagleboard/bb.org-overlays, but there is no 'slots' file
> anywhere! Could you help me?
>
> Thank you!!
>
> Shivanand Pattanshetti

Hi Shivanand, sorry for the delay.  I just noticed this email from you.

I'm replying to the beagleboard.org community mailing list and bcc'ing
you as others may benefit from this discussion.

My guess is that your system has u-boot overlays enabled:
https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays

The cape manager kernel driver is incompatible with u-boot overlays so
Robert Nelson has disabled the slots file:
https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#Where_did_the_slots_file_go.3F

If you have further questions, then please post the contents of your
/boot/uEnv.txt

thanks,
drew

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Re: [beagleboard] PWM Problems with BeagleBone Black Debian 8.4 Kernel 4.4

[Stuart Longland]

On 26/12/17 10:11, maxmike wrote:
> I can't seem to do  get-apt update on this version; session ends with:
> 
> Reading package lists... Done
> W: Size of file
> /var/lib/apt/lists/deb.nodesource.com_node%5f4.x_dists_jessie_main_binary-armhf_Packages.gz
> is not what the server reported 1003 1004
> W: Size of file
> /var/lib/apt/lists/repos.rcn-ee.com_debian_dists_jessie_main_binary-armhf_Packages.gz
> is not what the server reported 680242 803616
> W: Size of file
> /var/lib/apt/lists/security.debian.org_dists_jessie_updates_main_binary-armhf_Packages.gz
> is not what the server reported 584615 596286
> W: Size of file
> /var/lib/apt/lists/httpredir.debian.org_debian_dists_jessie_main_binary-armhf_Packages.gz
> is not what the server reported 8864066 8864371

Maybe the server changed just as you were doing an `apt-get update`?
(Or maybe just as the mirror you're using updated?)  Try again tomorrow
and see if it still happens, or maybe try a different mirror.

If you're using a proxy, check that isn't caching a stale result.
-- 
Stuart Longland (aka Redhatter, VK4MSL)

I haven't lost my mind...
  ...it's backed up on a tape somewhere.

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Re: [beagleboard] PWM Problems with BeagleBone Black Debian 8.4 Kernel 4.4

[maxmike]

I can't seem to do  get-apt update on this version; session ends with:

Reading package lists... Done
W: Size of file 
/var/lib/apt/lists/deb.nodesource.com_node%5f4.x_dists_jessie_main_binary-armhf_Packages.gz
 
is not what the server reported 1003 1004
W: Size of file 
/var/lib/apt/lists/repos.rcn-ee.com_debian_dists_jessie_main_binary-armhf_Packages.gz
 
is not what the server reported 680242 803616
W: Size of file 
/var/lib/apt/lists/security.debian.org_dists_jessie_updates_main_binary-armhf_Packages.gz
 
is not what the server reported 584615 596286
W: Size of file 
/var/lib/apt/lists/httpredir.debian.org_debian_dists_jessie_main_binary-armhf_Packages.gz
 
is not what the server reported 8864066 8864371

On Monday, December 25, 2017 at 3:09:56 PM UTC-8, maxmike wrote:
>
> I'm using cape-universal.
>
> On Monday, December 25, 2017 at 3:05:59 PM UTC-8, maxmike wrote:
>>
>> Nah, that doesn't work either AFAIK:
>>
>> I have kernel:  *4.4.68-ti-r110 #1 SMP*
>> I enable pwm as:* bash -c 'echo 1 > /sys/class/pwm/pwmchip4/export'*
>> Then I set ttyO4 tx as: */usr/bin/config-pin P9_13 uart*
>>
>> and when the app runs it gives me a file not found bleat. Indeed the pwm 
>> files are not there.
>>
>> * /usr/bin/config-pin P9_11 uart* is allowed though, so I can read but 
>> not write to the tty.
>>
>>
>> On Wednesday, November 8, 2017 at 8:44:42 AM UTC-8, RobertCNelson wrote:
>>>
>>>
>>>
>>> Easy: 
>>>
>>> don't use /sys/pwm/pwmchipX, instead use the /sys/devices directory: 
>>>
>>> /sys/devices/platform/ocp/4830.epwmss/48300200.pwm/pwm/pwmchip*/ 
>>>
>>> and ignore the "X"... 
>>>
>>> https://github.com/beagleboard/pocketbeagle/wiki/Peripherals 
>>>
>>> Regards, 
>>>
>>> -- 
>>> Robert Nelson 
>>> https://rcn-ee.com/ 
>>>
>>

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Re: [beagleboard] Qt embedded on a Debian Image

[Stuart Longland]

On 26/12/17 08:45, bigguin...@gmail.com wrote:
> From what I have found, Qt5 no longer has it's own windowing system so
> it would have to be a Qt4 setup in order to have the -qws option work.
> 
> I have been able to compile Qt4 locally on a BeagleBone Black (which
> took forever) and can get the video to work on a Chipsee 4.3" LCD
> cape but I can't get the resistive touch screen to work.

Does X11 or wayland work with that LCD?  I'd expect the lxqt images to
ship a working version of Qt.

I think Qt just uses the standard input layer.  What shows up if you run
the following?

$ tail -n 1 /sys/class/input/*/name
-- 
Stuart Longland (aka Redhatter, VK4MSL)

I haven't lost my mind...
  ...it's backed up on a tape somewhere.

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[beagleboard] Qt embedded on a Debian Image

[bigguiness]

Hello all!

Has anyone been able to get a Qt embedded setup working on a Debian IoT 
image?

>From what I have found, Qt5 no longer has it's own windowing system so it 
would have to be a Qt4 setup in order to have the -qws option work.

I have been able to compile Qt4 locally on a BeagleBone Black (which took 
forever) and can get the video to work on a Chipsee 4.3" LCD cape but I 
can't get the resistive touch screen to work.

Ideally, the setup should be cross-compiled so that development and 
debugging could be done on a fast host system. I have tried to 
cross-compile Qt4 on various Debian VM's I have setup but can't get any of 
them to successfully compile the library.

The real annoying thing is, if you do a google search to find any 
information on this there is a ton of outdated info that just doesn't work.

If anyone has a system that works and can provide the information on how to 
replicate it I would appreciate the help!

Thanks,
Hartley

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[beagleboard] Re: Can´t sudo apt-get update -> error while loading shared libraries

[zenlightbulb]

I hAVE TO SAME shit


On Thursday, 25 August 2016 16:32:46 UTC+2, Jan Hügel wrote:
>
> Hi there,
>
> this is my first post in this forum.
> I started to work with beaglebone green.
> I try to get remote debugging to work with eclipse (gcc).
>
> I cant install "gdbserver".
> If i want to "sudo apt-get update" i got the following error:
>
> debian@beaglebone:~$ sudo apt-get update
> /usr/lib/apt/methods/https: error while loading shared libraries: 
> /usr/lib/arm-linux-gnueabihf/librtmp.so.1: invalid ELF header
> E: Method https has died unexpectedly!
> E: Sub-process https returned an error code (127)
> E: Method /usr/lib/apt/methods/https did not start correctly
>
> Can anybode help me? I dont know why i cant update my sources.
> I got internet connection.
>
> If I try to download "gdbserver" i got following error:
>
> debian@beaglebone:~$ sudo apt-get install gdbserver
> Reading package lists... Done
> Building dependency tree   
> Reading state information... Done
> Package gdbserver is not available, but is referred to by another package.
> This may mean that the package is missing, has been obsoleted, or
> is only available from another source
>
> E: Package 'gdbserver' has no installation candidate
>
> Maybe somebody got the same problem , or can help me with this...?
>
> Regards
> Jan
>

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[beagleboard] SGX Driver problem

[mehdi . esma67]

I installed the "bone-debian-9.1-lxqt-armhf-2017-08-31-4gb" image into SD 
Card and booting up with 4.9.45 kernel(default kernel of image).

i used 
https://elinux.org/BeagleBoardDebian#SGX_BeagleBone.2FBeagleBone_Black to 
install SGX drivers.after following all steps no any module  loaded(pvr and 
omaplfb).according to the this question : 
https://groups.google.com/forum/#!topic/beagleboard/sOhHuq_T6KQ 
i updated BBB's kernel to "4.9.69" and do all steps again, but no any 
chance to load modules!

According to the 
https://elinux.org/BeagleBoardDebian#SGX_BeagleBone.2FBeagleBone_Black i 
installed v 4.4 kernel and boot up with 4.4 kernel and do the all steps 
again.after some efforts i can load "pvrsrvkm" but omapflb not loading.when 
i run "sudo modprobe omaplfb" i got the error "modprobe: ERROR: could not 
insert 'omaplfb': Exec format error"



Any help appreciated 

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[beagleboard] SGX drivers problem

[mehdi . esma67]

I installed the "bone-debian-9.1-lxqt-armhf-2017-08-31-4gb" image into SD 
Card and booting up with 4.9.45 kernel(default kernel of image).

i used 
https://elinux.org/BeagleBoardDebian#SGX_BeagleBone.2FBeagleBone_Black to 
install SGX drivers.after following all steps no any module  loaded(pvr and 
omaplfb).according to the this question : 
https://groups.google.com/forum/#!topic/beagleboard/sOhHuq_T6KQ 
i updated BBB's kernel to "4.9.69" and do all steps again, but no any 
chance to load modules!

According to the 
https://elinux.org/BeagleBoardDebian#SGX_BeagleBone.2FBeagleBone_Black i 
installed v 4.4 kernel and boot up with 4.4 kernel and do the all steps 
again.after some efforts i can load "pvrsrvkm" but omapflb not loading.when 
i run "sudo modprobe omaplfb" i got the error "modprobe: ERROR: could not 
insert 'omaplfb': Exec format error"



Any help appreciated 

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[beagleboard] SGX Drivers problem

[mehdi . esma67]

I installed the "bone-debian-9.1-lxqt-armhf-2017-08-31-4gb" image into SD 
Card and booting up with 4.9.45 kernel(default kernel of image).

i used 
https://elinux.org/BeagleBoardDebian#SGX_BeagleBone.2FBeagleBone_Black to 
install SGX drivers.after following all steps no any module  loaded(pvr and 
omaplfb).according to the this question : 
https://groups.google.com/forum/#!topic/beagleboard/sOhHuq_T6KQ 
i updated BBB's kernel to "4.9.69" and do all steps again, but no any 
chance to load modules!

According to the 
https://elinux.org/BeagleBoardDebian#SGX_BeagleBone.2FBeagleBone_Black i 
installed v 4.4 kernel and boot up with 4.4 kernel and do the all steps 
again.after some efforts i can load "pvrsrvkm" but omapflb not loading.when 
i run "sudo modprobe omaplfb" i got the error "modprobe: ERROR: could not 
insert 'omaplfb': Exec format error"



Any help appreciated 

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Re: [beagleboard] PWM Problems with BeagleBone Black Debian 8.4 Kernel 4.4

[maxmike]

I'm using cape-universal.

On Monday, December 25, 2017 at 3:05:59 PM UTC-8, maxmike wrote:
>
> Nah, that doesn't work either AFAIK:
>
> I have kernel:  *4.4.68-ti-r110 #1 SMP*
> I enable pwm as:* bash -c 'echo 1 > /sys/class/pwm/pwmchip4/export'*
> Then I set ttyO4 tx as: */usr/bin/config-pin P9_13 uart*
>
> and when the app runs it gives me a file not found bleat. Indeed the pwm 
> files are not there.
>
> * /usr/bin/config-pin P9_11 uart* is allowed though, so I can read but 
> not write to the tty.
>
>
> On Wednesday, November 8, 2017 at 8:44:42 AM UTC-8, RobertCNelson wrote:
>>
>>
>>
>> Easy: 
>>
>> don't use /sys/pwm/pwmchipX, instead use the /sys/devices directory: 
>>
>> /sys/devices/platform/ocp/4830.epwmss/48300200.pwm/pwm/pwmchip*/ 
>>
>> and ignore the "X"... 
>>
>> https://github.com/beagleboard/pocketbeagle/wiki/Peripherals 
>>
>> Regards, 
>>
>> -- 
>> Robert Nelson 
>> https://rcn-ee.com/ 
>>
>

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Re: [beagleboard] PWM Problems with BeagleBone Black Debian 8.4 Kernel 4.4

[maxmike]

Nah, that doesn't work either AFAIK:

I have kernel:  *4.4.68-ti-r110 #1 SMP*
I enable pwm as:* bash -c 'echo 1 > /sys/class/pwm/pwmchip4/export'*
Then I set ttyO4 tx as: */usr/bin/config-pin P9_13 uart*

and when the app runs it gives me a file not found bleat. Indeed the pwm 
files are not there.

* /usr/bin/config-pin P9_11 uart* is allowed though, so I can read but not 
write to the tty.


On Wednesday, November 8, 2017 at 8:44:42 AM UTC-8, RobertCNelson wrote:
>
>
>
> Easy: 
>
> don't use /sys/pwm/pwmchipX, instead use the /sys/devices directory: 
>
> /sys/devices/platform/ocp/4830.epwmss/48300200.pwm/pwm/pwmchip*/ 
>
> and ignore the "X"... 
>
> https://github.com/beagleboard/pocketbeagle/wiki/Peripherals 
>
> Regards, 
>
> -- 
> Robert Nelson 
> https://rcn-ee.com/ 
>

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Re: [beagleboard] Threading for Beagle Bone

[John Syne]

Get this book:

Linux Device Drivers Development by John Madieu


Doesn’t use BBB, but it does cover the area you are interested in. Most 
important, it was written for Linux Kernel 4.1 and updated to 4.14

Regards,
John




> On Dec 25, 2017, at 4:34 AM, Rohit Karkala  wrote:
> 
> Hello everyone, 
> 
> I want to implement the threading function for GPIO Interrupt in C Program. 
> 
> Can anyone help with the code or reference . 
> 
> 
> 
> 
> -- 
> For more options, visit http://beagleboard.org/discuss 
> 
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>  
> .
> For more options, visit https://groups.google.com/d/optout 
> .

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Re: [beagleboard] Re: Unable to locate package linux-headers-4.4.91-ti-r133

[John Syne]

I recommend that you get this book as it will cover all the things you need:

Mastering Embedded Linux Programming - Second Edition by Chris Simmonds
Published by Packt Publishing
Released June 2017

Covers Linux Kernel 4.9 and uses the BBB hardware.


Regards,
John




> On Dec 24, 2017, at 9:58 PM, pawan sharma  wrote:
> 
> hi man,
> i m very new with beaglebone black,
> my version is BBB-eMMC-flasher-debian-7.5-2014-05-14-2gb.
> when i did 'uname -r' i got vi3.8.13-bone50 .
> i have tried sudo apt-get update and all the things.
> and i m hoping u ll help me from starting.
> and also ll send me the link of latest version too.
> 
> 
> On Monday, 25 December 2017 02:57:50 UTC+5:30, Stuart Longland wrote:
> On 24/12/17 20:35, pawan sharma wrote: 
> > sir i have same problem i did it what have u suggested but i cant get of 
> > my version.plz help my whatsapp number is +918563078782 
> 
> On 24/12/17 20:39, pawan sharma wrote: 
> > hi i have same problem please mail me or whatsApp me as soon as possible 
> > please help me my number is +918563078782.please please please please 
> 
> On 24/12/17 20:50, pawan sharma wrote: 
> > my version is vi3.8.13-bone50 
> > hi please help me i have same problem my whatsapp number is +918563078782. 
> 
> On 24/12/17 21:23, pawan sharma wrote: 
> > RoSchmi 
> > *HELP ME PLEASE 
> > * 
> 
> Jeepers!  There's asking for help… and then there's practically 
> screaming the place down as if you're being murdered! 
> 
> A few points: 
> 1. We're not all running the same timezone and schedule as you. 
> 2. We're volunteers… we're going to respond on *our* schedule, not 
> yours, *IF* we are able to help.  This is *especially* true at this time 
> of year, where many of us will be busy *away* from computers (spending 
> time with friends and family for example). 
> 3. Repeatedly asking "help me" and providing no further information on 
> what you've done to solve the problem does not inspire any of us to 
> assist, as it shows a lack of initiative in researching the problem. 
> 
> Replying to a thread can be okay if you reply with additional 
> information you have found or with different experiments you have 
> attempted… this shows you're at least trying to work the problem, and 
> may help someone else that winds up in your situation in the future. 
> 
> Now… with that underway… 
> 
> It sounds a lot like APT is picking up on the standard `linux-headers` 
> package that Debian ship; and kernel version 3.18 is rather dated now. 
> So likely you're running an out-dated image. 
> 
> That's a guess on my part though, as I am new to the Beagle Bone 
> ecosystem myself.  (I have a few years experience with Linux on RISC, 
> and about 20 with Linux itself, but bought my first BeagleBone a few 
> weeks back.) 
> 
> 1. What BeagleBone image are you running? 
> 2. Have you tried doing an `apt-get update; apt-get dist-upgrade` to get 
> everything up to date? 
> 3. What does `apt-cache policy linux-headers` display? 
> -- 
> Stuart Longland (aka Redhatter, VK4MSL) 
> 
> I haven't lost my mind... 
>   ...it's backed up on a tape somewhere. 
> 
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> For more options, visit http://beagleboard.org/discuss 
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[beagleboard] Threading for Beagle Bone

[Rohit Karkala]

Hello everyone, 

I want to implement the threading function for GPIO Interrupt in C Program. 

Can anyone help with the code or reference . 



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