The successfully/clean compiled binary named LM is located at
/home/debian/bin
*root@BBB3:/home/debian/bin# ./LM./LM: /lib/arm-linux-gnueabihf/libc.so.6:
version `GLIBC_2.15' not found (required by
./LM)root@BBB3:/home/debian/bin#*
Upon a command to run it, the error message above is
, 2014 at 9:57 AM, Robert Nelson robertcnel...@gmail.com
wrote:
On Fri, Oct 24, 2014 at 9:47 AM, Graham Haddock gra...@flexradio.com
wrote:
The successfully/clean compiled binary named LM is located at
/home/debian/bin
root@BBB3:/home/debian/bin# ./LM
./LM: /lib/arm-linux-gnueabihf
Robert:
On a fresh install of
BBB-eMMC-flasher-debian-jessie-lxqt-armhf-2014-10-22-2gb.img
Boots clean.
I applied the install linux-image-3.8.13-bone67 and
I start getting
[FAILED] Failed to start Load Kernel Modules.
systemctl status systemd-modules-load.service sheds no light.
Tried
, Oct 27, 2014 at 9:49 PM, Robert Nelson robertcnel...@gmail.com
wrote:
On Mon, Oct 27, 2014 at 9:21 PM, Graham Haddock gra...@flexradio.com
wrote:
Robert:
On a fresh install of
BBB-eMMC-flasher-debian-jessie-lxqt-armhf-2014-10-22-2gb.img
Boots clean.
I applied the install linux-image
Robert:
Removing /etc/modules-load.d/mt7601.conf cured the problem.
Thanks for the quick response.
--- Graham
==
On Tue, Oct 28, 2014 at 12:30 PM, Robert Nelson robertcnel...@gmail.com
wrote:
On Tue, Oct 28, 2014 at 12:13 PM, Graham Haddock gra...@flexradio.com
wrote:
Robert
Gerald:
Thanks. Let us know when you know.
As a comment, I could not find any on-die temperature sensor.
In dealing with FPGA's and other high power chips, having a way to
directly read die temperature has helped us solve all kinds of problems.
Please pass on to TI marketing, if you get a chance.
All:
Excellent. I was not searching for the right terms.
That will prove to be most helpful.
Thanks,
--- Graham
On Mon, Nov 10, 2014 at 4:31 PM, Robert Nelson robertcnel...@gmail.com
wrote:
On Mon, Nov 10, 2014 at 4:29 PM, Thaddeus Woskowiak
tswoskow...@gmail.com wrote:
Graham,
I had a
Gerald:
Well, in the case of the BK 1550, set to 5.0 Volts, and any reasonable
current limit, if the power supply output is turned on,
and the power supply cap in the Beaglebone Black is fully discharged,
then the BBB never starts. Just one blink of the power LED then nothing.
On the
AnBer:
I realize that it is in writing on the Internet, therefore it must be true.
But, the board as documented by SweedJesus is a non-standard
and unusual construction for PC boards, therefore there is a slight
chance that the information is wrong.
I would suggest that you use the dimensions
And one additional thing:
3a.) While you are inside Gparted, expanding the partition size, make sure
that the 'boot' bit is set for the partition, otherwise the BBB can not
automatically
boot from the card.
--- Graham
On Thu, Nov 27, 2014 at 10:13 AM, Graham gra...@flex-radio.com wrote:
Jan:
Jan:
SSH secure copy is part of the core Linux toolbox, and should be part of
any of
the Debian distributions for the BBB. And it will work in both directions,
so you can also push an .img (or any file) from the remote Linux computer
back to the BBB.
Telnet access to the command line via SSH is
This report is for Jessie Snapshot, not the Debian 7.7
--- Graham
==
On Fri, Dec 12, 2014 at 5:44 PM, Graham gra...@flex-radio.com wrote:
Robert:
Thanks for the new release.
I installed on a BBB Rev-C and get the follow boot failure involving the
Hostname service.
Is there something I
Robert:
Thanks for the update.
Looking forward to a clean 'jessie' release.
Thanks for all your work.
--- Graham
==
On Thu, Dec 18, 2014 at 5:59 PM, Robert Nelson robertcnel...@gmail.com
wrote:
On Fri, Dec 12, 2014 at 5:52 PM, Robert Nelson robertcnel...@gmail.com
wrote:
On Fri, Dec 12,
You can implement the IEEE-1588 protocol in an all software system.
I doubt that you will be able to achieve the sub-microsecond time
synchronization performance, easily.
They are looking for sub microsecond time stamping of the packets.
All of the practical systems, I read about depend on
If it is the six wire version for the BBB, FTDI TTL-232R.
CTS is pin 2 is BROWN wire, RTS is pin 6 is the GREEN wire.
--- Graham
==
On Fri, Feb 6, 2015 at 5:41 PM, William Pretty Security
bill.pre...@xplornet.com wrote:
Unfortunately it is an FTDI USB adapter L
*From:*
is easy, how
would you mount the eMMC filesystem on an OS running
on a uSD card, so that you could directly get at the eMMC's
files?
Thanks,
--- Graham
Thanks,
--- Graham
On Sun, Jan 18, 2015 at 10:01 PM, Robert Nelson robertcnel...@gmail.com
wrote:
On Sun, Jan 18, 2015 at 9:44 PM, Graham
Further information...
If I follow the dtb-rebuilder instructions for building a custom .dtb file,
and
I just make and install am335x-boneblack.dts unchanged, that is, none of
my changes have been made or added to the example .dts file, I get the
same spewing forever Client can't run the TX
Did you set the boot bit on the 8gb flash card?
The later versions of the OS can not see or boot from the uSD card unless
the boot bit is set.
The CC string means that the BBB can not see the card, and is trying
to boot from
the serial port.
--- Graham
==
On Tue, Jan 20, 2015 at 8:07 AM,
Several Possibilities:
1.) When you write something to the file system, either a new file or
modify a file, you need to
type 'sync' on the command line to flush the buffers to the file system,
otherwise you can
loose the changes at unmount/shutdown.
2.) On the earlier Debian distributions, like
Most of the Debian distributions will totally fill the 2 GB eMMC. I
suspect that is your problem.
You will either need to find a distribution that can load and run in 2 GB,
or get a FAST uSD card
that is larger than 2 GB and load the Debian distribution and run from the
card instead.
--- Graham
Just after I figured out how to use it ... .
:-)
I like the method better than device tree overlays.
I hope ChangeSets is better yet.
--- Graham
On Thu, Feb 19, 2015 at 10:01 AM, Robert Nelson robertcnel...@gmail.com
wrote:
On Thu, Feb 19, 2015 at 9:55 AM, Graham gra...@flex-radio.com wrote:
Well these instructions are for the later single partition Debian
distributions.
The 7.5, distribution has the uEnv.txt file in a separate FAT partition,
so
the mounting instructions are slightly different, if you need to get at the
file in a different partition.
--- Graham
==
On Mon, Feb 9,
Robert:
Thank you.
--- Graham
==
On Sun, Mar 22, 2015 at 12:35 PM, Robert Nelson robertcnel...@gmail.com
wrote:
http://elinux.org/Beagleboard:Capes_3.8_to_3.14#Chipsee_bbb-exp-c
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are
There are two manufacturers of the BBB assembled boards.
Circuitco http://www.circuitco.com in Richardson, TX is the original and
primary manufacturer. They are a full-service CM.
Element14 (Newark/Farnell) is also now manufacturing them in China. Don't
know which CM.
--- Graham
==
On Fri,
I agree with Robert.
Debian 8, including the jessie snapshots come with glibc 2.19 installed.
The library used by the current GCC compiler is 2.19.
--- Graham
On Wed, Mar 11, 2015 at 11:29 AM, Robert Nelson robertcnel...@gmail.com
wrote:
On Wed, Mar 11, 2015 at 11:25 AM, Karl Anderson
With a specially tweaked file system, (read only root..) and correctly
using tmpfs on ram for your application, you can remove most of the
failures from even the crappiest SD cards. Along with extending the
life of the system, where power is not 100% stable.
Regards, Robert
Robert:
Could
If all that you want different from the default configuration is ttyO4
working, then Winston's advice is good.
If there are other/additional changes, then you will need to make
additional edits or changes to the .dts or .dti files.
--- Graham
==
On Thu, Mar 12, 2015 at 12:21 PM,
Brian:
Thanks for the pointers.
I will go read up on it.
Thanks,
--- Graham
==
On Fri, Mar 27, 2015 at 7:06 PM, Brian Anderson b...@nwlink.com wrote:
Since you are using Jessie images, have you tried using ConnMan to manage
the WiFi connection rather than resorting to all of this systemd
To get a reliable start of the WiFi service with jessie, I did the
following:
1.) do NOT uncomment the wireless enable/start lines in
/etc/network/interfaces.
This would try to start up the WiFi before USB is up and running and stable.
Apparently, once wpa_supplicant gets the error, it will not
, Nathaniel Johnson
gruyere.emmenta...@gmail.com wrote:
Graham, did you try Fredrik's solution? It works fine for me though left
the auto wlan0 line in the interfaces file.
-Nathaniel
On Thu, Mar 26, 2015 at 11:54 AM, Graham Haddock gra...@flexradio.com
wrote:
To get a reliable start
Rodney:
I highly recommend this book. The answers to all your questions with
examples are either
answered in this book, or Derek Molloy's website.
Exploring BeagleBone: Tools and Techniques for Building with Embedded Linux
Paperback - December 31, 2014
by Derek Molloy (Author)
ISBN-13:
BeagleBone Black SRM Version C.1
Section 6.7 Boot Configuration Design, Page 67.
See Page 68, Figure 38.
Yes, DNI means Do Not Insert.
Or some time the term NP , meaning No Pop or do not populate is used.
Section 6.8 Default Boot Options, Page 68.
It is covered again on page 106, Section
You don't have to short anything out for what he is describing to happen.
The BBB-Sitara uses a field of 100K resistors, which are either pull-ups or
pull-downs
on 15 different lines, pinned out from P8-31 through P8-46, which instructs
it how to boot.
Any load on any of these pins, of lower
I thought that it would work on USB, and not on external power supply.
If the situation is that you get the one blink and no boot, is the same for
both USB power and external power, then there is a hard failure of the
Beaglebone. Either a damaged power supply chip, or a short circuit
downstream
The signal on the bus is the same.
Just the name is different.
So to talk to the part using Linux, use the address in 7-bit format,
which for your part is 0x21.
If you are writing in C, you will use i2c-dev and ioctl
If you are writing in Python 2.7, you will use SMbus and something like the
Well, some suggestions and thoughts.
1.) In kernel 3.8, I think I2C Pins P9.19 and P9.20 report as I2C-1, so you
should see the part on that bus.
2.) Make sure you have not swapped the SCL and SDA lines. Make sure that
you are really connected to P9.19 and P9.20.
You should see activity on both
Hi Frederic:
You could make the 74HC541 work, since it has a CMOS input and should not
load the BBB during boot, provided that it has power supplied the entire
time the BBB is booting.
I was thinking more of something like the 74CBTLV3126 bus switch which
would disconnect your existing circuits
Agreed. But at the same time, the same hardware, right or wrong, works
fine under 3.14 and prior. So there has been some software change since
3.14 in the way that the hardware is managed.
--- Graham
==
On Tue, Jul 28, 2015 at 5:47 PM, Dennis Cote denn...@harding.ca wrote:
On Monday, July
I will add anecdotal comment in support of Guenter's comment about a serial
port problem.
Three times, I have had the ttyS0 port hardware serial console port stop
working in advance
of the reboot, while I could still sign in on SSH via Ethernet, and the BBB
seemed to be
otherwise still working.
It is not a flakey DC jack. But yes the symptoms do mimic that kind of
failure.
Same hardware works fine with Debian 8.1/kernel 3.14 and prior.
It happens under all loading /activity, but easy to reproduce with the
board idling, minimum console software load.
It does not happen with the board
:41 AM, Graham Haddock gra...@flexradio.com
wrote:
OK.
I took my Rev.C unit (1c:ba:8c:d9:5e:dd) and loaded
bone-debian-8.1-lxqt-4gb-armhf-2015-07-05-4gb.img onto a
16 GB uSD card. Unit, power supply and card are trusted.
Absolutely no changes to the image, just install, boot, run. No updates
OK.
I took my Rev.C unit (1c:ba:8c:d9:5e:dd) and loaded
bone-debian-8.1-lxqt-4gb-armhf-2015-07-05-4gb.img onto a
16 GB uSD card. Unit, power supply and card are trusted.
Absolutely no changes to the image, just install, boot, run. No updates,
additions or modifications.
No cape, only connections
What version Debian, and which version kernel is your friend running?
On Sat, Jul 18, 2015 at 7:46 PM, evilwulfie evilwul...@gmail.com wrote:
My friend powers his from USB and all is fine.
sounds like its related to the Vusb line issue posted here recently
On 7/18/2015 5:34 PM, Nuno
I power off the 5Volt power connector.
The only other connection to the unit is Ethernet cable.
--- Graham
==
On Sat, Jul 18, 2015 at 7:21 PM, evilwulfie evilwul...@gmail.com wrote:
powered how
On 7/18/2015 5:14 PM, Graham wrote:
For what it is worth...
I loaded the console version
.
Easy enough to test anyway . . .
On Sun, Jul 19, 2015 at 9:00 AM, Graham Haddock gra...@flexradio.com
wrote:
My advice to Erik is that, if he has something important to do, to go
back to an official release. He should use a Beta release only if he can
afford the additional problems it might
Hi William:
Doing nothing with the board. It is just sitting on the side connected to
+5V power and Ethernet.
So, for example, late last night (Central US time) I loaded
bone-debian-8.1-lxqt-4gb-armhf-2015-07-05-4gb.img
onto a trusted uSD card expanded the memory using gparted to the full 16GB,
William:
OK. I plan to let it run for at least two days, perhaps three.
--- Graham
On Mon, Jul 20, 2015 at 11:34 AM, William Hermans yyrk...@gmail.com wrote:
*William/Wulfman: So far, running on USB Power module (no USB
communications) the BBB is staying up. It has been 18 hours or so now.
William/Wulfman: So far, running on USB Power module (no USB
communications) the BBB is staying up. It has been 18 hours or so now.
Running the same software that rebooted twice in 24 hours on +5V barrel
connector input. I have seen the 'bad' configuration run as long as 36
hours between reboots,
Do you have the option to lock it in the basic ASCII 7 bit character set?
That would likely solve the problem.
The problem with Teraterm is that the BBB will sometimes put out some
gibberish or perhaps some non-printing control characters at the start of
the console output (don't know why) and it
I will try it by reloading a totally untouched
bone-debian-8.1-lxqt-4gb-armhf-2015-07-05-4gb.img,
and report back. No cape, trusted Rev.C hardware and power supply. All
communications via
Ethernet.
By my saying that 3.14 is rock solid, this includes up to
>
> What is the minimum voltage I should have on the GPIO input so it is read
> as 1 logic?
>
>
> For most CMOS the minimum input voltage guaranteed to be read as a one is
0.7 times Vcc.
But not always. Read the spec sheet for the part in use. For instance, the
transmission gate you found was
I think the VDD_3V3B rail is deliberately held off until the unit has
started booting,
and has already read the boot instructions. It is not a rise time issue.
I suspect it was done deliberately to help with the "don't drive the rest
of the pins" issue.
A little 5V to 3.3V regulator to power
Well, by definition, the boot programming pins are going to have the
pull-ups / pull-downs, so you know what they are going to be doing, until
over-ridden.
Most processors start up with the programmable pins as inputs, then move to
the configured state.
Anything else can be dangerous to the pins.
I found another one:
http://www.nextwarehouse.com/item/?2221755_g10e
Claims they have one in stock.
I am sure they will say they have just sold it to someone else if you order
it, and your waiting time for the next delivery is 8 weeks.
Except that they will keep forgetting to take that one
Bill:
I don't think the PRU clocks are externally available.
I don't know what your interface looks like, but if there was a clock line
involved in the data transfer, or marking when data is valid, I would look
at inverting or adding some delay in that line going to the receiving PRU.
If your
Do you have a terminal plugged into the command line serial port?
What does it say is happening?
--- Graham
On Sun, Feb 28, 2016 at 3:14 PM, Graham wrote:
>
> Alex:
>
> You are probably trying to draw too much power through the USB port from
> the BBB.
> I would try the
I have installed right angle connectors on most of my BBB, so that the
serial console connector comes out the bottom of the board.
Works fine. You do need to know how to solder to do this, without hurting
the board. It will no longer fit in a case when you bring
the right angle serial console
So, tell me again what the market is for a $250 "embedded" processor card.
I understand that TI is using it for an eval board for the AM572x.
OK, I get that. And they add an LCD and double the price. (?!?)
A pair of DSPs brings a lot of crunch power to the party.
OK, cool. RF transceivers,
Yes.
sudo chmod 755 myprogram
or
sudo chmod 755 myprogram.o
--- Graham
On Fri, Mar 25, 2016 at 9:50 AM, Seppo Nikkilä <
seppo.nikk...@innovativeideas.fi> wrote:
> myprogram.o
>
> On Fri, Mar 25, 2016 at 3:27 PM, Graham wrote:
>
>> And after you create the file for the
To Richard Cook:
My personal recommendation is Derek Molloy's:
Exploring BeagleBone: Tools and Techniques for Building with Embedded Linux
by Derek Molloy for John Wiley & Sons, 2014 -- ISBN 9781118935125
Book WebSite: includes errata, discussion
http://exploringbeaglebone.com/
Source Code:
PCB rework skills are very useful, and not explicitly taught in college.
Good luck with your project.
--- Graham
==
On Wed, Mar 23, 2016 at 3:13 AM, Christopher Earley
wrote:
> That bit about only being able to mux a specific mode's signal (e.g.
> I2C2_SDA or I2C2_SCL) to
William:
That would work.
The only "edge case" I might see as a problem would be if your ping target
went off line. Then the BBB would reboot itself every ten minutes even
though nothing was wrong with the BBB. I guess you could ping several
different targets in rotation and only reboot if
Well, in an emergency, you can make your own out of breakaway stock.
Or, if you are in the US and looking for manufacturing volumes,
then call your local Samtec rep. They can turn this kind of stuff in days.
They normally don't use stocking reps. Factory direct. Very fast response.
Hm.
Both "Major League Electronics" and Samtec are located in New Albany,
Indiana.
What are the chances ?
Sounds like there is a back-story there, somewhere.
--- Graham
On Wed, May 4, 2016 at 4:51 PM, evilwulfie wrote:
> I know about breakaway headers and
The problem is, that if it is not perfectly airtight, then the next time
you open it, you find the little silica gel packets floating in a puddle of
water. :-)
If it is not perfectly airtight, then every time it rains, or a cold front
passes, the box cools and it sucks in a little wet air (or
David:
The whole button press thing is old information.
Even then, you needed to have either a "flasher" or a uSD card resident
package.
The software installation process has evolved a lot. (for the better.)
The good news is that the Beaglebone and embedded Linux are rapidly
evolving.
The bad
that are on the uSD card?
> Thanks...Arnie
>
> On Fri, Jul 8, 2016 at 1:19 PM, Graham Haddock <gra...@flexradio.com>
> wrote:
>
>> Arnie:
>>
>> Simple answer: No.
>>
>> Although it is possible to have the OS running on the eMMC and an
>> app
It should automatically boot from the card without having to push the boot
button.
On Debian 8 and later, this usually means that you do not have the "boot
bit" set on the card.
If you created the card by installing the resident version of Debian, then
expanding the partition, the "boot bit"
t;> *On Debian 8 and later, this usually means that you do not have the
>>>> "boot bit" set on the card.*
>>>>
>>>
>>> No . ..as I said. It means there is an older bootloader on the emmc. If
>>> you remove the bootloader, said problem goes
The PMIC in the BeagleBone will go into shutdown, if the DC supply voltage
goes below 4.5 Volts, or above 5.5 Volts, even for a few milliseconds.
In use it should be held between 4.75 and 5.25, so you have some margin.
If the "lights flickered" then the power supply for the BBB did not have to
My personal favorite C/C++ IDE is Eclipse, with the C/C++ Development and
Remote System Explorer (RSE) environment packages. I use the GCC cross
compiler.
A reference on how to set this up, although needing some updating, due to
newer current versions of Debian and Eclipse, is Derek Molloy's
Hi David:
I am glad to hear that you got it fixed.
I am posting your reply back to the Beaglebone reflector, so others can
benefit from the discussion.
If you are talking about RAM in the PRU, perhaps some PRU expert can answer
your question. (I am not a PRU expert.)
If you are talking about
On Mon, Jan 30, 2017 at 12:24 PM, 'woody stanford' via BeagleBoard <
beagleboard@googlegroups.com> wrote:
> You are obviously knowledgeable, Graham, so we'll pose these questions to
> you then.
>
> (1) Is serial (ie. UART) communication on a BBBW (Rev C) Angstrom "distro"
> (ie. stock) done with
Hi William:
For an expert, you are totally correct.
For a newbie, the Raspberry Pi images seem to be designed to limit how much
tinkering you can do with Linux itself.
The tools and examples for modifying Linux itself are much better supported
on the Beaglebone.
Both are good for blinking LEDs
The ADC can be set up to run audio format TDM. You have two MCASP, which
are high speed multi-channel TDM engines to play with.
(Although I think they only did a real good job of pinning out MCASP0, need
to investigate, but one might be enough.)
Each are relatively independent bi-directional.
If you want the latest "release" version, use the 11-06 version, as
referenced on
https://beagleboard.org/latest-images
I told you where the "console version" corresponding to that "release"
version was.
==
If you are comfortable using a "testing" version, then I would only use the
ones that
Luther:
I have no explanation for that.
Only the most universal, uSD resident version is posted for the 'release'
versions.
I personally find the console version is the most useful for building much
smaller custom applications.
--- Graham
==
On Sun, Mar 19, 2017 at 7:38 AM, 'Luther Goh Lu
I am glad it is running now.
It is not a chip I have used, so you will have to sort it out, now that you
are communicating with it.
If you do need to remote it in the future, you should use shielded cable
with a good ground, increase the size of the bypass / filter cap at the IC,
from the 0.1 uF
Under Debian 8, the external I2C bus is now I2C-2.
I2C-1 is internal only, and used for talking to the PMIC and things like
that.
Don't use it, unless you really understand what you are doing.
--- Graham
==
On Fri, Mar 10, 2017 at 8:08 AM, christ christ
wrote:
> Hi
Robert:
Looks like exactly what I want. I'll implement that.
William:
Thanks for your comments.
--- Graham
==
On Mon, Apr 17, 2017 at 5:03 PM, Robert Nelson
wrote:
> On Mon, Apr 17, 2017 at 1:42 PM, Graham wrote:
> > I would like to build a
If you start with a "microSD/standalone" image, then you are ready to boot
and run from the card.
If you start with a "flasher" image, then you will need to edit the
/boot/uEnv.txt file to keep it from flashing your eMMC.
The other thing to know is that you may need to expand the partitions on
What OS/kernel is ithinu running?
"shutdown -P now" works on all my BBB/BBG boards.
But, I run from external +5V, without anything on the battery connections.
--- Graham
==
> I usually tell everyone to use:
>
> sudo systemctl poweroff
>
> as systemd knows how to tell the external tps65217 to
Justin:
>From your questions, you seemed to have an over-simplified view as to how
the clocks are generated in the Sitara.
It is not your grandfather's PIC.
It is a very modern, sophisticated, clock system, with many of the clock
subsystems being variable rate.
A "Clock Tree" is the generic
compliant/conforming, although you could still screw up the response time
servicing it slowly internally.
If they are "bit-banging" the I2C interface, then anything can happen,
depending on the quality of the programmer.
--- Graham
On Mon, May 15, 2017 at 11:33 AM, Graham Ha
What part number PIC?
--- Graham
==
On Mon, May 15, 2017 at 9:36 AM, 'Torsten K.' via BeagleBoard <
beagleboard@googlegroups.com> wrote:
> Hi Graham,
>
> just for reference: The guys who built the motor controller confirmed that
> they are having trouble with newer kernels on the Raspberry PI,
It looks like the MPU9250 has a non standard (to my way of thinking) I2C
read sequence that requires you to resend the register address as part of a
consolidated write/read sequence. The default tool i2cget does not deal
with this, and only deals with simple (standard to my way of thinking) read
I take back what I said about a non standard read sequence. I re-read the
data sheet, and they describe a standard concatenated write/read sequence
for a single byte read. But I do note that they do not describe a simple
read only sequence, where the part would start reading from the last
Let's start with a few clues.
What board and revision level are you using? (example: BeagleBone Black,
Rev C.)
What OS, version, release date and kernel are you using?
What other changes, if any, have you made to the system software?
What hardware / I-O do you have plugged into the accessory
William:
Great. Derek did update his video, although he still refers to the
original one on his website.
--- Graham
==
On Tue, May 23, 2017 at 5:16 PM, William Hermans wrote:
> https://www.youtube.com/watch?v=T9yFyWsyyGk
>
> . . .
>
> On Tue, May 23, 2017 at 3:11 PM, Graham
Torsten:
Great job.
--- Graham
==
On Mon, May 29, 2017 at 9:32 AM, 'Torsten K.' via BeagleBoard <
beagleboard@googlegroups.com> wrote:
> FYI: It's working now. The PIC code that came with the motor controller
> was not I²C re-start aware.
>
> I re-implemented the ISR to accept both stop/start
Sebastián:
Is your Arduino 3.3V or 5.0 V I/O?
What clock speed are you running the I2C bus in the Beaglebone?
With the time distortion in the level translator, I would not go above 100
kHz until proven good at higher speeds.
I note that your schematic shows VDDP connected to 5V.
This should be
Sounds like you can move ahead, and learn a little python.
--- Graham
==
On Fri, Jun 16, 2017 at 4:01 PM, wrote:
> now I can read :)
>
> this script works
>
> import smbus
>
> # General i2c device class so that other devices can be added easily
> class i2c_device:
> def
So, the COM port on Windows is talking to a virtual serial port in the BBB
USB widget.
There is no hardware UART involved, and no hardware clocks anywhere to
throttle or pace anything.
Then, you push this for transfer rate, while running it under a non
realtime OS.
I guess I am not surprised that
And they are a cool Blue, rather than industrial Black.
--- Graham
--
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The possible bus frequencies are integer divisors of 48 MHz, so only option
above 24 MHz is 48 MHz.
Spec on the W5500 chip says it will run up to 80 MHz.
So, I will recompile the ".dtbo' for 48 and report.
--- Graham
==
On Sat, Oct 7, 2017 at 6:02 PM, Robert Nelson
I am just reporting what "speedtest-cli" says.
I note that watching "htop" at the same time, on the USB-2 to Ethernet
tests, the CPU is maxing out at 100 percent, so the speed is not
necessarily constrained by the network interface, but the CPU's ability to
feed it, through the USB stack.
I
Will the same Ethernet overlay work for both the ETH Click and the ETH-WIZ
Click?
Since the 10/100 Mb Ethernet (ETH WIZ) Click board is $19, and the 10 Mb
only ETH Click board is $24, I bought the 10/100 ETH WIZ click board.
--- Graham
==
On Wed, Sep 27, 2017 at 1:56 PM, Robert Nelson
You use the "USB-tether-gadget", which, when your USB cable is connected to
a Windows host computer, allows you to bridge and share the Ethernet port
on the Windows host.
I have it working on Windows 10.
See
> On Mon, Oct 2, 2017 at 8:20 AM, Alex Bagehot <ceea...@gmail.com> wrote:
>
>>
>>
>> On Fri, Sep 29, 2017 at 1:55 PM, Graham Haddock <gra...@flexradio.com>
>> wrote:
>>
>>> You use the "USB-tether-gadget", which, when your USB cable is connec
Yes, try some other power supplies. and if they stay between 4.75 and 5.25
under all the different load conditions a BBB can create, it will work fine.
USB power is highly variable from computer to computer. Sometimes it works
fine, sometimes it does not.
USB-1 was 0.5 Amps max, not enough to
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