Thank you.
That explains what happened. Fascinating.
John Dammeyer
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
Behalf Of John Allwine
Sent: June-07-21 8:55 AM
To: Beagle Board
Subject: Re: [beagleboard] MachineKit
Hi John,
I'm not a maintainer of MachineKit
>
> For the BBB, they originally used the Xenomai kernel patchset, then
> eventually started working on utilizing the RT Linux stuff.. Then they
> discovered FGPA hardware, shortly after their forum really became
> quiet..
>
> It's just an application that utilized Xenomai and RT kernel
I read
that.
Thanks
John
> -Original Message-
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Robert Nelson
> Sent: June-04-21 2:51 PM
> To: Beagle Board
> Subject: Re: [beagleboard] MachineKit
>
> On Fri, Jun 4, 2021
What's the status with MachineKit for the BBB? Will it ever be resurrected and
brought up to date? My understanding is MachineKit used a different approach
to the RTOS part of real time Linux compared to LinuxCNC running on say the Pi4.
John
--
For more options, visit
eagleboard@googlegroups.com
Subject: Re: [beagleboard] Re: BeagleBone Black (C) USB based touch not working
It was the Beaglebone USB connector.
Touch is currently not calibrated.
But on my WIN10 PC it works fine. Can recommend the display.
John Dammeyer schrieb am Do., 3. Juni 2021, 22:27:
So it was t
So it was the display USB that had the issue. Not the BBB.
How do you like the touch response on that display?
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
Behalf Of Peter Lange
Sent: June-03-21 12:28 PM
To: beagleboard@googlegroups.com
Subject: Re: [beagleboard]
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Dennis Lee Bieber
> On Tue, 25 May 2021 19:44:55 -0700, in gmane.comp.hardware.beagleboard.user
> "John Dammeyer" wrote:
>
>
> >
> >OK. Hadn't noticed unt
Hi Dennis,
I will investigate that further. Wanted to get the SPI bus Type K Thermocouple
module working first. Baby steps.
The code is slightly different from the Pi but not radically so. I used
'/dev/spi/0.0' since there is no '/dev/spidev0.0' on my Beagle.
>
> My concern was that
And yet more progress using the pxl library and Lazarus with the rewritten code
from the pxl Blinky.pas example and adafruit_max31855.py. SPI bus operation.
Source code attached.
debian@ebb:~/lazarus/TC$ ./TC
Reading temperature, press any key to exit...
Temperature: 21.25C 70.25F
> Because this example program uses the high speed gpio the fault happens much
> sooner on the Pi without the sudo.
>
> pi@raspberrypi:~/projects/lazarus/TC $ ./TC
> An unhandled exception occurred at $00084EE4:
> ERPiOpenFile: Cannot not open
> file
Hi Dennis,
I tried on the groups site to edit this post and change what I wrote.
I meant to say both systems _do_not_ place local variables on the heap. In
fact I'm not sure that static are placed on the heap since that could cause all
sorts of fragmentation issues.
The advantage of static is
ps.com] On
> Behalf Of Dennis Lee Bieber
> Sent: May-25-21 10:39 AM
> To: Beagleboard
> Subject: [beagleboard] Re: ioctl messages to Beagle SPI port.
>
> On Tue, 25 May 2021 09:45:39 -0700, in gmane.comp.hardware.beagleboard.user
> "John Dammeyer" < <mailto:jo
May 2021 15:36:54 -0700, in gmane.comp.hardware.beagleboard.user
> "John Dammeyer" wrote:
>
>
> >I will state that waiting over two minutes for a Beagle to boot into Linux
> >desktop mouse/keyboard/screen is unacceptable. Windows
> with a 640K 8088 or a Pentium-33MHz could c
So I've solved the problem with the
ESysfsSPITransfer: Cannot transfer <1> data byte(s) through SPI bus.
The C versions with the spi_ioc_transfer structure declared inside the
transfer() function work on both the Beagle and Pi3.
Here's the BBB version from and you can see the code is
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Dennis Lee Bieber
> wrote:
>
> >
> >For a screen based turnkey app, you can only display a splash screen for a
> >few seconds, before the user thinks it is broken, a bit longer for an
> >animated splash
107872968?pid=InProduct=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers_wl=ym_sub1=Internal_sub2=Global_YGrowth_sub3=EmailSignature>
On Mon, May 24, 2021 at 12:32 PM, John Dammeyer
wrote:
Just a totally irrelevant side note here.
I finally found out why my Panasonic DMP-BD30 is so incredibly annoying on
power up. I can press the po
Just a totally irrelevant side note here.
I finally found out why my Panasonic DMP-BD30 is so incredibly annoying on
power up. I can press the power button and the display lights up and a 'HELLO'
message shows up instantly. Then noises come from inside. The 'HELLO'
brightens and then
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Dennis Lee Bieber
> On Fri, 21 May 2021 09:39:34 -0700, in gmane.comp.hardware.beagleboard.user
> "John Dammeyer" wrote:
>
> >static const char *device = "/dev/spidev1.
age-
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of John Dammeyer
> Sent: May-21-21 9:40 AM
> To: beagleboard@googlegroups.com
> Subject: RE: [beagleboard] Re: ioctl messages to Beagle SPI port.
>
> Thanks Dennis,
>
>
> >
Thanks Dennis,
> -Original Message-
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Dennis Lee Bieber
> "John Dammeyer" wrote:
>
>
> >The sad thing is that Derek Molloy's book, only in passing refers to
>
[mailto:beagleboard@googlegroups.com] On
Behalf Of John Dammeyer
Sent: May-20-21 5:43 PM
To: beagleboard@googlegroups.com
Subject: RE: [beagleboard] ioctl messages to Beagle SPI port.
The latest version of Buster does this when I look for SPI bus ports. The
older Stretch version doesn't have the 0.0 and 0.1
The latest version of Buster does this when I look for SPI bus ports. The
older Stretch version doesn't have the 0.0 and 0.1 and everything is scaled up
by 1.
On either system the scope doesn't show any activity on the SPI0 pins. No CS,
no CLK no Data Out.
The test program from
Thanks. Yes. It does.
John
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
Behalf Of Amit Goradia
Sent: May-20-21 2:42 AM
To: BeagleBoard
Subject: Re: [beagleboard] Reducing Boottime in Beaglebone Black
On Wednesday, 19 May, 2021 at 10:07:53 pm UTC+5:30
ub3=EmailSignature>
On Wed, May 19, 2021 at 11:10 PM, John Dammeyer
wrote:
So to add this so the research I did isn't repeated.
The control message breaks down as follows:
Top two bits are the direction. The 'k' (0x6B) identifies the SPI type. The
number of bytes is placed into the 32 bi
YPEBITS)
#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
Behalf Of John Dammeyer
Sent: May-19-21 8:44 PM
To: beagleboard@googlegroups.com
Subject: [beagleboard] ioctl messages to Beagle SPI port.
The spidev_test.
The spidev_test.c program from the Exploring BeagleBone by Derek Molloy (chp08)
tests the SPI port by setting the SPI parameters and then writing out a test
block. The text diagnostics I've added show what the macro was that is sent as
part of the ioctl call. Trying to break down the macro
Hi Amit,
Interesting. 4.19.94 is a only a little bit faster than 4.14.108. Is there a
document somewhere that explains what to do to even just speed up both start up
and shut down?
What did you do to get it to 50 seconds?
John
debian@ebb:~$ uname -a
Linux ebb 4.14.108-ti-r136 #1stretch
> -Original Message-
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of John Dammeyer
> Sent: May-18-21 10:40 AM
> To: beagleboard@googlegroups.com
> Subject: RE: [beagleboard] Re: Using GPIOs without Using sudo
>
> Hi
Hi Dennis,
> Suggest
>
> if (not (IsPinBitSet(Pin, ExportedBitmask)
> or IsPinBitSet(Pin, ExportDefinedBitmask)) then begin
>
> That way you don't waste time with the TryReadCharFromFile() if you already
> know it was externally exported.
The
-
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Dennis Lee Bieber
> Sent: May-12-21 9:24 AM
> To: Beagleboard
> Subject: [beagleboard] Re: Using GPIOs without Using sudo
>
> On Tue, 11 May 2021 18:51:22 -0700, in gmane.comp.
the same issue. The Raspberry Pi Click Shield lists that
pin as an Rx but of course the Pi doesn't have a CAN device so who cares…
John
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
Behalf Of John Dammeyer
Sent: May-17-21 1:22 PM
To: beagleboard
> -Original Message-
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of John Dammeyer
> Sent: May-16-21 8:25 PM
> To: beagleboard@googlegroups.com; 'Robert Nelson'
> Subject: RE: [beagleboard] Configure CAN0 with buildroot
>
is active.
John
> -Original Message-
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of John Dammeyer
> Sent: May-16-21 8:15 PM
> To: 'Robert Nelson'
> Cc: 'Beagle Board'
> Subject: RE: [beagleboard] Configure CAN0 with buildr
With a 2A 5V supply. No capes installed. Only Ethernet connected and the 4
port USB 2.0 hub is also powered with a 2A supply
John
> -Original Message-
> From: Robert Nelson [mailto:robertcnel...@gmail.com]
> Sent: May-16-21 7:05 PM
> To: John Dammeyer
> Cc: Beagle Boar
eboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of John Dammeyer
> Sent: May-16-21 6:47 PM
> To: 'Beagle Board'
> Subject: RE: [beagleboard] Configure CAN0 with buildroot
>
>
>
> > -Original Message-
> > From: Robert Nelson [mailto:robertcnel.
> -Original Message-
> From: Robert Nelson [mailto:robertcnel...@gmail.com]
> > I moved the MicroSD card over to the other Beagle. Booted and USB mouse
> > and keyboard (Logitech wireless) work. The Logitech
> wireless was not discovered on the other Beagle.
> >
> > I think it may be
the lsscsi and lsblk commands to see what the system thinks that
device is?
On Sun, May 16, 2021, 12:49 PM John Dammeyer wrote:
If it's like the Beaglebone Black, when you apply power, you have to hold the
boot button down for quite a while.That's what tells the system to boot
from the sd
If it's like the Beaglebone Black, when you apply power, you have to hold the
boot button down for quite a while.That's what tells the system to boot
from the sd card.
It won't matter if you form the card as Balena etcher will write the image in
the format required for the Beagle.
John
With the Cape plugged into the console version it gets to a certain point and
then shuts off.
U-Boot SPL 2019.04-g10968f0 (Feb 19 2021 - 21:40:51 +)
Trying to boot from MMC2
Loading Environment from EXT4... ** File not found /boot/uboot.env **
** Unable to read "/boot/uboot.env" from
the cape back.
>From the descriptions on https://beagleboard.org/latest-images I can't figure
>out what the latest graphical desktop image is for the BBB.
Thanks
John
From: Robert Nelson [mailto:robertcnel...@gmail.com]
Sent: May-14-21 6:45 PM
To: John Dammeyer
Cc: Beagle Board
Subje
I've only used CAN1 since the I2C for Cape ID isn't something I wanted to lose.
The Beagle that was running with the CAN cape had its SD card die so I lost the
configuration information. But this site here does a pretty good job of
explaining what is needed.
Hi Dennis,
I've been playing with that yesterday.
I think the library needs to be changed in a couple of places. As you pointed
out, it doesn't really know if the GPIO pin was already exported until it tries
to do it and then flags that it's exported in the flags variable.
The problem is if
ssage-
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Dennis Lee Bieber
> Sent: May-12-21 9:24 AM
> To: Beagleboard
> Subject: [beagleboard] Re: Using GPIOs without Using sudo
>
> On Tue, 11 May 2021 18:51:22 -0700, in gmane.comp.hardware.bea
Followed what this user reported step by step.
https://stackoverflow.com/questions/41586162/access-gpio-on-beaglebone-as-non-root-user
No matter. ./Blinky still requires sudo as explained in the comments at the
start of the program.
So after creating the
80-gpio-permissions.rules
And creating
May-11-21 5:30 PM
> To: Beagleboard
> Subject: [beagleboard] Re: Using GPIOs without Using sudo
>
> On Tue, 11 May 2021 09:43:49 -0700, in gmane.comp.hardware.beagleboard.user
> "John Dammeyer" wrote:
>
>
> >To try this program do sudo apt install lazarus.
>
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Dennis Lee Bieber
> "John Dammeyer" wrote:
> >The SPI bus ADAfruit application for a 320x240 display written in Python
> >runs properly rendering LENNA.JPG onto the
First of all thank you for responding. Comments below.
> From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
> Behalf Of Dennis Lee Bieber
> On Mon, 10 May 2021 10:09:14 -0700, in gmane.comp.hardware.beagleboard.user
> "John Dammeyer" wrote:
That's the section heading on page 302 of Derek Molloy's second edition
"Exploring Beaglebone"
I found the section lacking in information on exactly how to do this. A web
search showed up the following pages.
https://github.com/adafruit/adafruit-beaglebone-io-python/issues/137
A number of years ago I bought the 4DCAPE-43T. I have an SD card with
Wheezy 7.11 that can display the desktop. I believe Jesse and subsequent
releases no longer supported this cape and 4D System in Australia doesn't
either.
So here's the thing. I realize that with this cape installed I
From: machine...@googlegroups.com [mailto:machine...@googlegroups.com] On
Behalf Of justin White
Sent: March-18-20 5:24 PM
To: John Dammeyer
Cc: Machinekit; beagleboard@googlegroups.com
Subject: Re: [Machinekit] Seeed to design and build Machinekit focused Cape for
BeagleBone Black/AI
Wow
it up but don't even know where to start.
Obviously there's probably more going on under the covers to deal with hard
limits. Seems like soft limits are dealt with before motion starts with the
option to not move because it will exceed machine limits.
Thanks
John Dammeyer
--
For more
, an MPG
and a display it's not something buried deep in a box behind the machine.
So based on my experience I would never again build the motor drivers onto the
cape.
John Dammeyer
Bas
--
For more options, visit http://beagleboard.org/discuss
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You received this message because you
he array and when and how.
John Dammeyer
From: machine...@googlegroups.com [mailto:machine...@googlegroups.com] On
Behalf Of John Dammeyer
Sent: March-12-20 4:59 PM
To: 'Machinekit'
Cc: beagleboard@googlegroups.com
Subject: RE: [Machinekit] Seeed to design and build Machinekit focused Cape
. The
amount of time the 8th pair is ON and OFF is dependent on the PWM frequency and
PWM pulse period within that frequency. It's a simple matter of keeping the
queues with this information full and default values when they aren't.
John Dammeyer
From: machine...@googlegroups.com
first CAN working.
Thx, Tracy
On Nov 1, 2017, at 10:33 AM, John Dammeyer <jo...@autoartisans.com> wrote:
CAN1 and CAN2 are available when you aren’t using any other cape and I think
eiher HDMI or perhaps it’s the LCD interface. It’s been a while. There is no
relationship between
a good idea to have auto line feed set in putty so that each received
message is on a new line.
John Dammeyer
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On
Behalf Of Tracy Smith
Sent: October-31-17 3:42 PM
To: BeagleBoard
Subject: [beagleboard] Re: BBB- DCAN1
Almost a month later. Anyone tried this and duplicated the results?
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One more screen capture that shows a small app developed on and run
headless using WIN-7 and VNCserver. No text problems.
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To
On Friday, December 23, 2016 at 9:57:23 AM UTC-8, William Hermans wrote:
>
>
> On Fri, Dec 23, 2016 at 10:36 AM, John Dammeyer <jo...@autoartisans.com
> > wrote:
>
>> My apologies Robert,
>> I realize now after seeing your answer (sarcastic?) that the lack
On Thursday, December 22, 2016 at 7:21:04 AM UTC-8, RobertCNelson wrote:
>
> On Thu, Dec 22, 2016 at 2:20 AM, John Dammeyer <jo...@autoartisans.com
> > wrote:
> > I realize this isn't the correct thread to discuss the
> > problem of slow response on the Jesse
I'm a little bit afraid of updating and have moved backwards. I've had
nothing but troubles with Jesse 8.6. Using a Rev B Beaglebone Black I have
MicroSD cards with 7.8, 8.6 and the original Angstrom in the on board 2GB.
IMHO LXQt sucks. I realize this isn't the correct thread to discuss
The web page http://elinux.org/BeagleBoardUbuntu is a link to putting
Ubuntu on the Beagle. What it doesn't say is why? Why not stay with
Debian Jesse? I like the lxqt interface far less than lxde. And to be
truthful I like the Raspberry Pi XWindows installation the best. Does
Ubuntu add
CAN requires at least two devices on the bus running the same bit rate.
That's because the sender of a message expects all receivers to assert a
dominant bit in the ACK slot at the end of the message. Without receivers
the protocol resends the message continuously.
Your easiest solution is
I've not really had a lot of trouble getting my One Wire temperature sensor
to function. But there have been lots of stumbles and I'm still confused
in a lot of places. Let's start with what I'm running on a BBB RevB with
the OS on a 16GB MicroSD card.
uname -a for all shows:
Linux
Debian 7.8 and the LXDE desktop work with tightvncserver, although a bit
fuzzy compared to a Raspberry Pi3. From 8.1 to 8.6 and the lxqt desktop
the keyboard doesn't work. The fix for GNOME doesn't have any effect.
--
For more options, visit http://beagleboard.org/discuss
---
You received
I'm a little late on this discussion but since I have lots of CAN
experience and I'm also working on getting CAN working on my Beagle so I
thought I'd jump in.
I bought the Logic Supply CBB_Serial with the on board CAN driver.
I followed the instructions on page 14 of their Serial Cape Manual
may be happening. If that does not work, then maybe you can
use *strace* to debug candump.
http://www.cyberciti.biz/tips/linux-strace-command-examples.html
On Sat, Apr 11, 2015 at 11:07 AM, John Dammeyer jo...@autoartisans.com
javascript: wrote:
I'm a little late on this discussion
Problem solved. My ViewSonic Monitor didn't wake up properly to the HDMI
signals so it appeared like the BBB wasn't running the graphic interface.
Logging in with PuTTY did work after entering a null password the first
time. Then it accepted the machinekit password and gave the illusion it
I've created the MachineKit SD card image. Verified as non-corrupted.
I've held down the Boot button and powered up the Beaglebone Black. I use
PuTTY on WIN7 to connect. I log in as machinekit. Enter the same as
password. And the system hangs there doing nothing else. Clearly it runs
to
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