[beagleboard] Re: BB boot from eMMC/SD

[ASH KR]

Thank you for help! I followed this link to get it done. :)

https://elinux.org/Beagleboard:Expanding_File_System_Partition_On_A_microSD

Thanks.
/Ash

On Friday, March 26, 2021 at 1:55:10 AM UTC+9 Dennis Bieber wrote:

> On Wed, 24 Mar 2021 19:20:26 -0700 (PDT), in
> gmane.comp.hardware.beagleboard.user ASH KR
>  wrote:
>
> >Hi,
> >Since first when I have the new BB, I successfully booted it from already 
> >flashed image in 4gb eMMC. I need to install some libraries and other 
> stuff 
> >related to Qt, so there is no space left on eMMC. I wish to use SD slot 
> for 
> >my work from now. I flashed the image to SD and plugged it into BB, power 
> >on while pressing the 'boot' button keep it booted but when i check the 
> >storage using 'df -h' it doesn't show it. Please suggest. I am new to 
> this.
>
> Any Beagle made in the last few years should not need you to hold down
> the boot select switch. The u-Boot (in eMMC) should detect that there is an
> OS on the uSD card, and will transfer to use that card for the rest of the
> boot process.
>
> >
> >What is the best way to use both eMMC and SD together OR separately ?
> >
> >Is it possible to use it like...
> >1. eMMC (boot) + SD (further install)
> >2. SD (boot + install)
>
> When using a uSD card, #2 is the normal operation mode. Option #1 will
> be problematic to set up as the card needs to be NON-Bootable; you'd have
> to mount the card after the Beagle has booted from eMMC, and then create
> mount points to overlay certain standard directories (/bin, etc.) -- which
> would need have copies of everything from the equivalent eMMC directory.
> After which, apt install should put the newly installed stuff into the uSD
> directory. However, that can lead to some confusion -- as you may still
> need to have LXQT on eMMC so the X environment is started early.
>
> My recommendation -- just get a large uSD card, burn a recent image to
> it, boot it, then run the partition expansion script to make the whole card
> available.
>
>
> -- 
> Dennis L Bieber
>
>

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[beagleboard] QT GUI for BB Board

[ASH KR]

Hi, I need to develop a GUI application on BB to control Servo (specially 
Dynamixels) and they provide DynamixelSDK to command control the Servos. So 
I am preferring to develop application on Visual Studio on windows and 
cross compile it using visualGDB and deploy to BB Board. Since I am new to 
Qt, can anybody please help any gui-test example to control the Servo from 
BB and how can I use ServoSDK in this? Please help or suggest.

Thanks,
BR /Ash

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[beagleboard] Re: GPIO from PRU via OCP on a Beaglebone Black - Timing Issues

[Daniel Kulp]

One more thing you can try with the TI kernel if your kernel build has 
issues:

The biggest problem is the CPU going in and out of idle states.   Thus, you 
can install the cpufrequtils and linux-cpupower packages and then at boot 
run:

cpufreq-set -g performance
cpupower idle-set -d 1

(and maybe cpupower idle-set -d 0 )

The first will lock the cpu freq at 1Ghz.   The second will disable the 
very costly idle states in the processor.   I believe the M3 processor in 
the L4_WAKEUP is in charge of the power management stuff which includes the 
CPU idle settings.   Flipping the CPU out of idle seems to take a long time 
and blocks the bus while it waits.   Disabling that state helped a lot.
Alternatively, you can install the "bone" kernel which doesn't have the 
idle driver (or at least didn't early last year, not sure anymore).  
 Anyway, those had a huge impact, but still wasn't 100% which is why we 
decided to compile our own kernel completely disabling everything on the 
L4-WAKEUP.


Dan


On Thursday, March 25, 2021 at 3:01:56 PM UTC-4 Remy Porter wrote:

> > Personal plug:  I'd be happy to sell capes that don't use gpio0.  
> https://kulplights.com
> Heh, we've already got all the boards for this project. Maybe we'll 
> revisit that design in future projects, though. 
>
> Your software is definitely doing a *lot* more than ours, and certainly 
> much more than we need- we just listen for RGB data on a UDP socket. We, 
> uh… don't really treat them like lights, and instead as very large pixels 
> in a screen. All the mapping/direction/orientation stuff is handled in the 
> render stack, which we build custom for pretty much every project. Last one 
> was a Unity App that was part of a kiosk connected to a gigantic 
> chandelier. Our current project is *kinda* like an architectural scale 
> video wall with a C++/OpenCV app driving the pixels.
>
> I might give the FPP image a shot though, if building my own custom kernel 
> doesn't help. Your guidance on that was *super* helpful, though your FPP 
> kernel did *not* get along with our software (LEDs just didn't work- in 
> lieu of diagnosing that, I just opted to compile my own, which is going on… 
> right now).  Thanks a bunch!
>
> On Tuesday, March 23, 2021 at 4:17:37 PM UTC-4 d...@kulp.com wrote:
>
>> The debs for the kernel are at:
>> https://github.com/FalconChristmas/fpp-linux-kernel/tree/master/debs
>> do you should be able to update to our kernel fairly easy.If you need 
>> to start building your own kernel, I'd suggest grabbing a Beaglebone AI and 
>> building on that.   It's WAY faster for kernel building.  :).You can 
>> cross-compile from a debian x86_64, but I was never able to get that to 
>> actually produce proper .deb files that could be installed cleanly on the 
>> BBB so I pretty much just use the AI for kernel builds.  (It's actually the 
>> ONLY thing I use my AI for.)
>>
>> FPP provides a complete UI frontend for configuring the pixel strings and 
>> such and we do allow the various 4 channel types. It does a lot of 
>> other things as well.   That said, most of these things are done on the ARM 
>> side and not the PRU.  Part of trying to figure out the latency issue was 
>> seeing what make sense to do on the arm side and what works best on the PRU 
>> side.If you actually wanted to try FPP and see if FPP's optimized PRU 
>> code and kernel combination would work, you could use the FPP 4.6.1 image 
>> on an SD card (see the release assets at github).   You would just need to 
>> create a small json file in /opt/fpp/capes/bbb/strings to describe the 
>> pinout of your cape (use any of them in that directory as a starting point) 
>> and it should then "just work".  You would need to configure e1.31/artnet 
>> input universes on the Channel Input tab, put FPP in "bridge" mode, and 
>> then it should work like a normal light controller and accept pixel data.  
>>  (Or use DDP protocol which doesn't require configuring the input)
>>
>> Personal plug:  I'd be happy to sell capes that don't use gpio0.  
>> https://kulplights.com [image: Screen Shot 2021-03-23 at 4.01.22 PM.png]
>>
>>
>>
>> On Tuesday, March 23, 2021 at 3:49:47 PM UTC-4 Remy Porter wrote:
>>
>>> That is *super* helpful. Thanks a bunch. The pinlayout we're using on 
>>> our boards uses a lot of GPIO0 already, so it's definitely too late to 
>>> change on this. The way we're banging things out, all the GPIOs are being 
>>> hit at the same time, so the latency does appear to hit our strings. I'll 
>>> try giving your kernel a shot, though- that'll definitely help. And maybe 
>>> I'll move the GPIO0 bits over to the other PRU. I hate to have to do that, 
>>> but if it's what needs done, it's what needs done.
>>>
>>> Also, off topic, but poking at FPP: SK6182s support the WS281x protocol, 
>>> so you mostly already support them, but if you poke around at 
>>> ThrowingBagels approach a little, it's not a big push to get 32-bit support 
>>> for RGBW LEDs (we 

Re: [beagleboard] RE: http://beagleboard.org/librobotcontrol/

[Jason Kridner]

Yes, I'm maintaining it as I have time.

Can you be more explicit in your question? What functions are you calling?

Are you using the latest version?

On Fri, Mar 19, 2021 at 2:01 PM set_  wrote:

> Hello,
>
> Is LibRobotControl still being pursued and maintained by anyone?
>
> I am asking b/c I have a BBBlue and I just wired up some motors and
> wheels. The tests all pass, i.e. except for some PRU lib.
>
> Anyway, I keep trying to use the lib. I am receiving errors.
>
> The errors are dedicated to this idea:
>
> *the function is deprecated...*
>
> Are the docs still being kept?
>
> Seth
>
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> .
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Re: [beagleboard] interfacing of buzzer with beaglebone black

[Vinicius Juvinski]

You just need to call gpio - setting 1 and 0 to control the gpio.
Just ensure the gpio is exported first.

Em qui., 25 de mar. de 2021 às 19:56, Raghav Chopra <
raghavchopra2...@gmail.com> escreveu:

> I'm using active buzzer
>
> On Thu, Mar 25, 2021 at 3:41 PM Vinicius Juvinski <
> vinicius.juvin...@gmail.com> wrote:
>
>> Are you using a passive or active buzzer ?
>>
>> Em qui., 25 de mar. de 2021 às 19:15, raghavch...@gmail.com <
>> raghavchopra2...@gmail.com> escreveu:
>>
>>> Hii,
>>> can anyone explain me how I can connect buzzer with beaglebone black and
>>> I am connected it through pin no 23 of header P9.
>>>
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Re: [beagleboard] interfacing of buzzer with beaglebone black

[evilwulfie]

use a buffer / driver  IC to drive buzzer.

On 3/26/2021 9:52 AM, Vinicius Juvinski wrote:

You just need to call gpio - setting 1 and 0 to control the gpio.
Just ensure the gpio is exported first.

Em qui., 25 de mar. de 2021 às 19:56, Raghav Chopra 
mailto:raghavchopra2...@gmail.com>> escreveu:


I'm using active buzzer

On Thu, Mar 25, 2021 at 3:41 PM Vinicius Juvinski
mailto:vinicius.juvin...@gmail.com>>
wrote:

Are you using a passive or active buzzer ?

Em qui., 25 de mar. de 2021 às 19:15, raghavch...@gmail.com
 mailto:raghavchopra2...@gmail.com>> escreveu:

Hii,
can anyone explain me how I can connect buzzer with
beaglebone black and I am connected it through pin no 23
of header P9.
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Re: [beagleboard] RE: http://beagleboard.org/librobotcontrol/

[set_]

Hello,

Yeppers. *rc_test_motors.c *is the source I think I am running while 
attempting to make two dc motors move from the motor controllers onboard 
the BBBlue.

...

I usually just run *rc_test_motors*. This is where I come across issues of 
deprecation. 

Seth

P.S. I will check my version and check if I am using the most recent 
version. I think I am running the latest but that is only b/c of my updated 
kernel and bbb.io/latest-images image. 


On Friday, March 26, 2021 at 11:41:17 AM UTC-5 Jason Kridner wrote:

> Yes, I'm maintaining it as I have time.
>
> Can you be more explicit in your question? What functions are you calling?
>
> Are you using the latest version?
>
> On Fri, Mar 19, 2021 at 2:01 PM set_  wrote:
>
>> Hello,
>>
>> Is LibRobotControl still being pursued and maintained by anyone?
>>
>> I am asking b/c I have a BBBlue and I just wired up some motors and 
>> wheels. The tests all pass, i.e. except for some PRU lib. 
>>
>> Anyway, I keep trying to use the lib. I am receiving errors.
>>
>> The errors are dedicated to this idea:
>>
>> *the function is deprecated...*
>>
>> Are the docs still being kept?
>>
>> Seth
>>
>> -- 
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>>  
>> 
>> .
>>
>

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Re: [beagleboard] QT GUI for BB Board

[Alexandre Nardelli]

Hello BR/Ash

I´d like to help you.
What do you need ?
.


Em sex., 26 de mar. de 2021 às 05:19, ASH KR  escreveu:

> Hi, I need to develop a GUI application on BB to control Servo (specially
> Dynamixels) and they provide DynamixelSDK to command control the Servos. So
> I am preferring to develop application on Visual Studio on windows and
> cross compile it using visualGDB and deploy to BB Board. Since I am new to
> Qt, can anybody please help any gui-test example to control the Servo from
> BB and how can I use ServoSDK in this? Please help or suggest.
>
> Thanks,
> BR /Ash
>
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> 
> .
>

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Re: [beagleboard] QT GUI for BB Board

[ashnote8]

Hi Alexandre, Thanks for your reply.well, I need to develop a simple GUI 
application on Beaglebone Board to control the Servo (in my case it's 
Dynamixel) parameters like speed, mode, direction..etc. The Servo provider 
provides the SDK based on API and protocol. I wish to use this SDK while 
Integrate with Qt-gui. I individually tested the SDK to control the servo, but 
how to integrated it with Qt-gui, I am new to this. Any test example or 
suggestions would be highly appreciated. Please help.Thanks,/Ash
 Original message From: Alexandre Nardelli 
 Date: 3/27/21  3:55 AM  (GMT+09:00) To: 
beagleboard@googlegroups.com Subject: Re: [beagleboard] QT GUI for BB Board 
Hello BR/AshI´d like to help you.What do you need ?.Em sex., 26 de mar. de 2021 
às 05:19, ASH KR  escreveu:Hi, I need to develop a GUI 
application on BB to control Servo (specially Dynamixels) and they provide 
DynamixelSDK to command control the Servos. So I am preferring to develop 
application on Visual Studio on windows and cross compile it using visualGDB 
and deploy to BB Board. Since I am new to Qt, can anybody please help any 
gui-test example to control the Servo from BB and how can I use ServoSDK in 
this? Please help or suggest.Thanks,BR /Ash



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[beagleboard] Re: QT GUI for BB Board

[Dennis Lee Bieber]

On Sat, 27 Mar 2021 07:16:26 +0900, in gmane.comp.hardware.beagleboard.user
ashnote8  wrote:

>Hi Alexandre, Thanks for your reply.well, I need to develop a simple GUI 
>application on Beaglebone Board to control the Servo (in my case it's 
>Dynamixel) parameters like speed, mode, direction..etc. The Servo provider 
>provides the SDK based on API and protocol. I wish to use this SDK while 
>Integrate with Qt-gui. I individually tested the SDK to control the servo, but 
>how to integrated it with Qt-gui, I am new to this. Any test example or 
>suggestions would be highly appreciated. Please help.Thanks,/Ash

You've basically just repeated your original message, which doesn't
really help anyone in offering assistance.

You are unlikely to get any "test example" as that requires someone
else to have similar hardware (servo).

The particular GUI toolkit is likely irrelevant. You need to define
what operations of the servo you want to expose to the user of the GUI
application, you need to decide what type of controls the GUI toolkit
provides best map to each operation, and you then need to create call-back
functions (most GUI toolkits these days rely upon call-backs to implement
operations -- whereas the ancient Amiga required one to code the
"main-loop" which received event messages and had to dispatch to the
appropriate function; hmmm, looks like PyGame also uses user-defined
main-loop). Call-back functions need to be short and fast, as the GUI will
be "hung" while a call-back is processing.

Have you written code for ANY GUI system? Is the servo library
available from Python (may need to study the ctypes module to access the
servo library). I ask as there are lots of Python-based frameworks for the
various low-level GUI back-ends, which may be easier to code for. Any code
for a call-back event handling system? Have you studied any tutorials for
the GUI framework you intend to use?
https://towardsdatascience.com/top-10-python-gui-frameworks-for-developers-adca32fbe6fc
Consider looking at the docs for PySimpleGUI -- since the above linked
article implies that one can select from Qt, WxPython, Tkinter, and some
other for the actual back-end.
https://pysimplegui.readthedocs.io/en/latest/
(separate pip install for each backend -- pysimpleguiqt vs pysimpleguiwx,
etc.)

Current Qt for Python appears to be pyside2, so that documentation may
be relevant.

If doing "native" GUI you may be impacted by the API being either C or
C++ compatible.




-- 
Dennis L Bieber

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Re: [beagleboard] QT GUI for BB Board

[jonnymo]

Personally, I would suggest you learn Qt first and then try to
implement with what you are trying to do.

However, there is this GitHub Repo that might be of interest to you.
https://github.com/amin-amani/QT-Dynamixel


Or have a look at  SmartServoGui in the following link:
https://github.com/emericg/SmartServoFramework

Cheers,

Jon


On Fri, Mar 26, 2021 at 3:16 PM ashnote8  wrote:

> Hi Alexandre, Thanks for your reply.
>
> well, I need to develop a simple GUI application on Beaglebone Board to
> control the Servo (in my case it's Dynamixel) parameters like speed, mode,
> direction..etc. The Servo provider provides the SDK based on API and
> protocol. I wish to use this SDK while Integrate with Qt-gui. I
> individually tested the SDK to control the servo, but how to integrated it
> with Qt-gui, I am new to this. Any test example or suggestions would be
> highly appreciated. Please help.
>
> Thanks,
> /Ash
>
>  Original message 
> From: Alexandre Nardelli 
> Date: 3/27/21 3:55 AM (GMT+09:00)
> To: beagleboard@googlegroups.com
> Subject: Re: [beagleboard] QT GUI for BB Board
>
> Hello BR/Ash
>
> I´d like to help you.
> What do you need ?
> .
>
>
> Em sex., 26 de mar. de 2021 às 05:19, ASH KR 
> escreveu:
>
>> Hi, I need to develop a GUI application on BB to control Servo (specially
>> Dynamixels) and they provide DynamixelSDK to command control the Servos. So
>> I am preferring to develop application on Visual Studio on windows and
>> cross compile it using visualGDB and deploy to BB Board. Since I am new to
>> Qt, can anybody please help any gui-test example to control the Servo from
>> BB and how can I use ServoSDK in this? Please help or suggest.
>>
>> Thanks,
>> BR /Ash
>>
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>>
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