I noticed that on my BBB running the RCN demo image from August
(debian-7.6-console-armhf-2014-08-13) on a microSD card the uEnv.txt file
is actually in /boot/uboot, not in /boot. Also there was a warning in
uEnv.txt ##Note: On the BeagleBone Black, there is also an uEnv.txt in the
eMMC, so
I'm trying to do this on my BBB with Debian but I'm getting a compile error:
debian@bbblack:~/dtb-rebuilder$ make
DTC src/arm/am335x-base0033.dtb
/bin/sh: 1: dtc: not found
make[1]: *** [src/arm/am335x-base0033.dtb] Error 127
make: *** [all_arm] Error 2
debian@bbblack:~/dtb-rebuilder$
I
Hi Steve
You need to install device tree compiler. I suggest you compile it from
source yourself, as there is a patch you need to apply. Here's my
instructions from a manual I wrote a while ago:
BBB git clone git://git.kernel.org/pub/scm/utils/dtc/dtc.git
BBB cd dtc
BBB git reset --hard
Thanks that got me a lot further along.
The problem I have now is the serial ports I believe I enabled didn't
appear in the /dev directory.
What I did was uncomment the lines like the following in
am335x-boneblack.dts, recompiled and installed:
#include am335x-bone-ttyO1.dtsi
I have
On Fri, Nov 28, 2014 at 4:22 PM, Steve G stevege...@gmail.com wrote:
Thanks that got me a lot further along.
The problem I have now is the serial ports I believe I enabled didn't appear
in the /dev directory.
What I did was uncomment the lines like the following in
am335x-boneblack.dts,
Which kernel are you using? I'm on 3.14.23-ti-r32 and all serial ports are
available under /dev/ right after a fresh flash. But I still needed to
rebuild DTBs to get them working.
Btw, have you tried
this: http://beaglebone.cameon.net/home/serial-ports-uart
On Saturday, November 29, 2014
What user is the script running as ?
On Mon, Nov 24, 2014 at 9:02 PM, John Mladenik john5...@sbcglobal.net
wrote:
Ok Sorry, I am trying to send characters out the UART2 on a BBB Rev C
using HTML Javascript SEE program below: This worked before and stopped
working, not sure why. Be patient
Thanks for the response but I got it to work right after I posted this and
I tried to delete it to not bother you with the explanation. The thing
worked the whole time I had my logic analyzer on the wrong pins. When I
tried it on my 2nd BBB, that had never been powered until then, it worked
Ok Sorry, I am trying to send characters out the UART2 on a BBB Rev C using
HTML Javascript SEE program below: This worked before and stopped working,
not sure why. Be patient with my I am a newbie a month or so into
learning HTML. Javascript, linux, beaglebone, but only working on it part
Robert,
I am having the same problem with UART2 (the only UART I need to work) but
mine worked in the past. It even worked through re-power until the BBB sat
overnight unpowered. I went through all of the steps I found in links to
make it work, but none of the steps were anything like
John, detailed description is required. Dont work is pretty vague and
leaves a lot of room for guessing.
On Sat, Nov 22, 2014 at 8:41 PM, John Mladenik john5...@sbcglobal.net
wrote:
Robert,
I am having the same problem with UART2 (the only UART I need to work)
but mine worked in the past.
I've been playing around with my BBB for about a month now and got
everything up and running. Today I spent the whole day to get UART loopback
to work on Debian. It simply doesn't work! Tried with Qt (cross-compiled
and all samples are working), QSerialPortInfo::availablePorts().count()
http://elinux.org/Beagleboard:Capes_3.8_to_3.14#Custom_dtb
The pins aren't mixed to the peripheral.
Example enable this
https://github.com/RobertCNelson/dtb-rebuilder/blob/3.14-ti/src/arm/am335x-boneblack.dts#L78
And run...
make ; sudo make install ; sudo reboot
On Nov 14, 2014 2:46 PM,
Hi Robert,
Many thanks. You saved my day! :-)
I did a loopback on UART2 and UART4 and they're both fine. However UART1 TX
doesn't work! RX is fine. I had a look at the dtb sources and pins are
correct. Do you have any idea what's wrong?
Just for the reference, it wasn't really smooth and
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