I'm sorry to hear the frustration Karl, but actually I'm on the other arc:
Pi to BeagleBone. The Pi has a lot going for it, but I get the feeling
it's trying to craft an Arduion-like experience. That's great for messing
around, but my experience was that as soon as you leave the well worn path,
y
Ok, I posted the full source code here:
https://github.com/davidgood1/ledmsgchar
I'm not sure that userspace has much to do with what I'm seeing right now.
I'm using a kthread that runs until a flag is set indicating that there is
a new buffer of data ready from user space and my task (update_row)
OK so yes, seeing your code would help us understand what you're bottleneck
but I've a pretty good idea why you're LCD matrix refresh is so slow. It
has to do with userspace communicating with kernel space, and you're either
invoking some system API calls ( which are notoriously slow ), or you're
c
Show us some code.
On Sun, Mar 20, 2016 at 6:28 PM, David Good wrote:
> Hi All,
>
> I've been experimenting with embedded linux and matrixed LED displays. I
> started on a Raspberry pi user space program, but could see visual
> artifacts on the display due to inconsistent timing of my sleep com
Reading this made me laugh.
On 3/20/2016 3:49 PM, William Hermans wrote:
>
> /Trying to update the flash to Debian 8.3 and initially I get the
> back and forth Knight Rider pattern. Then, after a bit I get just
> 4 double blink leds every half second or so. Looks like a few
> oth
Hi All,
I've been experimenting with embedded linux and matrixed LED displays. I
started on a Raspberry pi user space program, but could see visual
artifacts on the display due to inconsistent timing of my sleep command.
So, I figured that moving the basic row scanning into the kernel would help
>
> *Trying to update the flash to Debian 8.3 and initially I get the back and
> forth Knight Rider pattern. Then, after a bit I get just 4 double blink
> leds every half second or so. Looks like a few others have seen this, but
> no conversation around the issue or possible solutions.*
>
> *My ras
On 21 Mar 2016 06:28, "Karl Easterly" wrote:
> Mine are going in the trash
Seriously?
Don't trash em. Send em to me. Email me your details and I'll pay for
shipping if you like.
PO Box 195
Lindisfarne
Tasmania
AUSTRALIA 7015
P.
--
For more options, visit http://beagleboard.org/discuss
---
Quoting Robert Nelson :
On Mar 20, 2016 2:28 PM, "Karl Easterly" wrote:
It's clear that the BBB is a dead product. There is no meaningful
resources for issues, and when the system simply won't 'reset from a new
image from their site'... that's the last straw.
Mine are going in the trash a
On Mar 20, 2016 2:28 PM, "Karl Easterly" wrote:
>
> Trying to update the flash to Debian 8.3 and initially I get the back and
forth Knight Rider pattern. Then, after a bit I get just 4 double blink
leds every half second or so. Looks like a few others have seen this, but
no conversation around the
Trying to update the flash to Debian 8.3 and initially I get the back and
forth Knight Rider pattern. Then, after a bit I get just 4 double blink
leds every half second or so. Looks like a few others have seen this, but
no conversation around the issue or possible solutions.
My raspberry pi's w
Hello,
We have a custom, BBB based board, which, when all relevant patches and
PMIC settings have been applied, will power-cycle when poweroff is issued
(remains off for a couple of seconds, and powers on again. The strange
thing is that if we have the UART0 Tx pin connected to a PC, when power
https://www.google.com/search?q=how+to+debug+linux+kernel+modules
Just like you would on any platform.
On Thu, Mar 17, 2016 at 8:46 PM, John Syne wrote:
> To debug kernel modules with JTAG, you have to have a debugger which is
> kernel aware like Lauterbach. If you don’t want to use JTAG, then
Hey guys,
I'm currently designing a greenhouse automation control unit utilizing the
BBB as the brain. In order to create industrial strength wiring I'd like
to use terminal block connections to each connector on the P8 and P9
headers.
To give you a visual of what I'd like to do check out a p
Have you tried to boot it fro ma system that is located on external
microSD-card? E.g. a Ubuntu-version?
Am Freitag, 11. März 2016 17:25:57 UTC+1 schrieb Anh Le Tuan:
>
> It is a BeagleBone Black which was successfully flashed. I tried to
> upgrade the kernel. However failed. I reboot the device
What is your kernel version?
Regards,
John
> On Mar 18, 2016, at 1:22 PM, Audrey wrote:
>
> It says:
> root@beaglebone:/# echo 1 >
> /sys/bus/iio/devices/iio:device0/scan_element/in_voltage0_en
> -bash: /sys/bus/iio/devices/iio:device0/scan_element/in_voltage0_en: No such
> file or directo
I've successfully ran Robert Nelson's scripts
(https://eewiki.net/display/linuxonarm/BeagleBone) which compile a kernel
image, u-boot, installed root file system etc. and installed on microSD
card.
It boots perfectly, I can use the serial device or SSH into a Beagleboard
Green and all looks goo
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