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BeagleBone

12,169 bytes added, 05:46, 2 December 2015

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=Setup=

==Change Hostname==

<syntaxhighlight lang="bash">sudo vi /etc/hostname</syntaxhighlight>

<syntaxhighlight lang="bash">sudo vi /etc/hosts</syntaxhighlight>

==Add public key==

<syntaxhighlight lang="bash">cat ~/.ssh/id_rsa.pub | ssh debian@beaglebone1.local "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys"</syntaxhighlight>

==Debloat==

http://kacangbawang.com/beagleboneblack-revc-debloat-part-1/

==Install devmem2==

https://scivision.co/devmem2-on-the-beaglebone-black/

==Install Adafruit BBBIO==

https://github.com/adafruit/adafruit-beaglebone-io-python

==Install

==Textmate and rmate for simple remote editing==

*install textmate on os x system

*install ruby on beaglebone:

opkg install ruby

</syntaxhighlight>

*install rmate on beaglebonei:

gem install rmate

</syntaxhighlight>

*setup ssh tunneling

ssh -R 52698:localhost:52698 pi@192.168.2.144

</syntaxhighlight>

==Disable default services==

systemctl disable bone101

systemctl disable cloud9

systemctl disable gateone

</syntaxhighlight>

==Copy OS to microSD card==

*Download OS (.img.xz)

*unzip

*figure out what your card is. check df before and after inserting the card:

df -h</syntaxhighlight>

*unmount the drive:

diskutil unmountDisk /dev/disk2s1</syntaxhighlight>

*copy image to drive:

dd if=Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.12-beaglebone-2013.06.20.img of=/dev/rdisk2 bs=1m</syntaxhighlight>

==Default boot from SD card==

*boot beaglebone while holding the S2 button (by SD card reader). this boots from the sd card.

*rename the MLO file from /media/BEAGLEBONE/ :

cd /media/BEAGLEBONE

mv MLO MLO_bak

</syntaxhighlight>

*The beaglebone will now boot from microSD until you replace the MLO file.

==Edimax WiFi fix==

for debian 3.8.13-bone70

*http://www.feverlabs.org/2015/03/edimax-wifi-adapter-on-beaglebone-black/

Basically, disable HDMI output.

likely due to HDMI interference.

alternately, use a usb extension cable :)

*boot wifi

if it works...

<syntaxhighlight lang="bash">sudo ifup wlan0

ioctl[SIOCSIWAP]: Operation not permitted

ioctl[SIOCSIWENCODEEXT]: Invalid argument

Internet Systems Consortium DHCP Client 4.2.2

For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/wlan0/80:1f:02:bf:23:52

Sending on LPF/wlan0/80:1f:02:bf:23:52

Sending on Socket/fallback

DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5

DHCPREQUEST on wlan0 to 255.255.255.255 port 67

DHCPOFFER from 10.1.10.1

DHCPACK from 10.1.10.1

bound to 10.1.10.121 -- renewal in 4605 seconds.</syntaxhighlight>

*adafruit wifi reset script: https://learn.adafruit.com/setting-up-wifi-with-beaglebone-black?view=all

*<syntaxhighlight lang="bash">iwconfig</syntaxhighlight>

==What Kernel am I running==

*<code>uname -a</code>

==other==

*a lot of good setup stuff here: http://www.gigamegablog.com/2012/01/29/beaglebone-linux-101-configuring-angstrom-linux/

=Debugging=

==Find Beaglebone on Local Network==

*MAC Address: C8:A0:30:AB:71:1D (Texas Instruments)

Nmap scan report for 192.168.2.31

**Scan for BBB:

<syntaxhighlight lang="bash">sudo nmap -sP 192.168.2.* | awk '/^Nmap/{ip=$NF}/C8:A0:30/{print ip}'

</syntaxhighlight>

==TTL Cable==

*Install USB drivers

**for os x - http://sourceforge.net/projects/osx-pl2303/

*Connect pins like so:

http://www.adafruit.com/images/large/954bbb_LRG.jpg

(RED IS NOT CONNECTED)

*From Terminal, start session:

**<code>screen /dev/cu.usbserial 115200</code>

*http://learn.adafruit.com/adafruits-raspberry-pi-lesson-5-using-a-console-cable/test-and-configure

==ssh not working==

*https://groups.google.com/forum/?fromgroups#!topic/beagleboard/Ya2qE4repSY

==want to allow processes to keep running?==

*https://groups.google.com/forum/#!msg/beagleboard/-iNTsNh94HI/faELHCJn_esJ

=OpenCV=

==python-opencv==

*install python opencv bindings:

opkg install python-opencv</syntaxhighlight>

=potrace=

*http://potrace.sourceforge.net/#downloading

=gphoto2=

*install libusb-1.0-dev

opkg install libusb-1.0-dev

</syntaxhighlight>

*download libgphoto2

**http://sourceforge.net/projects/gphoto/files/libgphoto/

*download gphoto2

**http://sourceforge.net/projects/gphoto/files/gphoto/2.5.2/

*build and install libusb, libgphoto2, then gphoto2:

./configure

make

make install

</syntaxhighlight>

=Onboard LEDs=

*flashing an led by hand from terminal: http://elinux.org/EBC_Exercise_10_Flashing_an_LED

=GPIO=

==PyBBIO==

*https://github.com/alexanderhiam/PyBBIO

*https://github.com/alexanderhiam/PyBBIO/issues/18

==other==

gpio - http://beaglebone.cameon.net/home/using-the-gpios

=Hardware=

==Rechargeable LiPo==

http://www.element14.com/community/community/designcenter/single-board-computers/next-gen_beaglebone/blog/2013/08/10/bbb--rechargeable-on-board-battery-system

==Real Time Clock (RTC)==

http://www.dfrobot.com/image/cache/data/DFR0151/V1.1/IMGP9616-600x600.jpg

*TinyRTC 1.1 - http://www.dfrobot.com/index.php?route=product/product&product_id=879#.UqdVqmT6f3E

**Remove RA1 to operate at 3.3V. (This is an array of pullup resistors for pins SDA - SQ)

*http://learn.adafruit.com/adding-a-real-time-clock-to-beaglebone-black/overview

==C920==

===software===

*boneCV - https://github.com/derekmolloy/boneCV/

===capturing===

*capture 300 frames of H264 at 1920 x 1080 to output.raw:

capture -F -o -c 300 > output.raw

</syntaxhighlight>

*capture and convert with audio:

./capture -F -o -c0|avconv -re -i - -f alsa -ac 2 -i hw:1,0 -strict experimental -threads 0 -acodec aac -ab 64k -ac 2 -vcodec copy avtest.mp4

scp avtest.mp4 rtwomey@192.168.2.31:~/Movies

</syntaxhighlight> from [http://nerdlogger.com/2013/11/09/streaming-1080p-video-using-raspberry-pi-or-beaglebone-black/ here]

===convert to mpg4===

raw2mpg4

</syntaxhighlight>

or

ffmpeg -f h264 -i output.raw -vcodec copy output.mp4

</syntaxhighlight>

===formats===

v4l2-ctl --list-formats-ext

</syntaxhighlight>

*set resolution:

v4l2-ctl --set-fmt-video=width=960,height=720,pixelformat=1

</syntaxhighlight>

*

===streaming===

*http://www.oz9aec.net/index.php/beaglebone/476-turning-the-beaglebone-into-a-high-definition-ip-camera

*RTP - http://derekmolloy.ie/streaming-video-using-rtp-on-the-beaglebone-black/

*UPD - multicast - http://derekmolloy.ie/udp-video-streaming-beaglebone-black/

===dash cam===

*http://zachhuff386.github.io/dashcam/

**BeagleBone Black (16gb/1080p/30fps/Logitech C920): 9 hrs 30 mins

==Servo==

*https://groups.google.com/forum/?fromgroups#!topic/beagleboard/NBm14riUIts

*https://groups.google.com/forum/?fromgroups#!topic/beagleboard/wjbOVE6ItNg

**implementation in bonescript https://github.com/jadonk/bonescript/blob/master/node_modules/bonescript/index.js

*by hand http://www.phys-x.org/rbots/index.php?option=com_content&view=article&id=106:lesson-3-beaglebone-black-pwm&catid=46:beaglebone-black&Itemid=81

=Serial Communication=

==Ubuntu==

*use wget to fetch setup tools:

**<code>wget https://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg#md5=fe1f997bc722265116870bc7919059ea</code>

*install setuptools:

**<code>sudo sh setuptools-0.6c11-py2.7.egg</code>

*install pyserial:

**<code>sudo easy_install pyserial</code>

==Angstrom==

*update opkg:

**<code>opkg update</code>

*install pyserial:

**<code>opkg install python-pyserial</code>

=Pockesphinx=

*https://groups.google.com/forum/?fromgroups=#!topic/beagleboard/aBznzq_bNuU

*Install libasound2, alsa-dev, and alsa-lib-dev. (libasound and alsa-lib-dev were already installed on my beaglebone black):

**<code>opkg install alsa-dev</code>

*Get sphinxbase and pocketsphinx, preferrably putting them in a code directory.:

**<code>wget http://sourceforge.net/projects/cmusphinx/files/sphinxbase/0.8/sphinxbase-0.8.tar.gz</code>

**<code>wget http://sourceforge.net/projects/cmusphinx/files/pocketsphinx/0.8/pocketsphinx-0.8.tar.gz </code>*Unzip:**<code>tar -xzf sphinxbase-0.8.tar.gz</code>**<code>tar -xzf pocketsphinx-0.8.tar.gz</code>*Generate configuration files. '''Configure without python.''' In the sphinxbase-0.8 directory:**<code>./autogen.sh --without-python</code>=Supercollider=*http://supercollider.github.io/development/building-beagleboneblack.html

=Audio=

~~http~~*purchase usb sound card.*connect stereo microphone. *record audio with arecord:**<code>arecord -D sysdefault -t wav -c 2 -r 44100 -f S16_LE -v binaural2.wav</code>*play audio:**<code>aplay binaural2.wav</~~www~~code>*use the ALSA mixer to set recording levels, output levels, etc.~~tigal.com/product~~:**<code>alsamixer</~~2924~~code>

=Debian=

*http://elinux.org/BeagleBoardDebian

=Installing Ubuntu=

*The instructions below are written for linux. I installed from a Ubuntu live USB drive (Ubuntu 13) on my macbook pro (os x 10.8).

*Once you are booted in ubuntu on your non-beagleboard system, follow instructions here:

**http://elinux.org/BeagleBoardUbuntu#Method_1:_Download_a_Complete_Pre-Configured_Image

*there will probably be missing packages

*you may need to add universe to package repository to get those missing packages:

**<code>sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe restricted multiverse"</code>

*list disks:

**<code>diskutil list</code>

=Curses=

*install python-curses:

**<code>opkg install python-curses</code>

=Oki Data Microline 320/1Turbo=

*plug in Sabrent usb to parallel adapter

*should show up in device tree as: /dev/usb/lp0

*echo arbitrary text to lp0 from bash shell:

<syntaxhighlight lang="bash">echo "I didn't realize it could be so fast" > /dev/usb/lp0</syntaxhighlight>

*print to lp from python:

<syntaxhighlight lang="python">lp = open("/dev/lp0","w")

lp.write("Hello World!\n")

lp.close()</syntaxhighlight>

http://rosettacode.org/wiki/Hello_world/Line_printer#Python

==CUPS on beaglebone==

*Install CUPS:

<syntaxhighlight lang="bash">opkg install cups</syntaxhighlight>

*List available printers:

<syntaxhighlight lang="bash">lpinfo -v</syntaxhighlight>

*Add ML320 as new printer:

<syntaxhighlight lang="bash">lpadmin -p ML320 -E -v usb://OKI%20DATA%20CORP/ML320/1TURBO</syntaxhighlight>

*Enable ML320:

<syntaxhighlight lang="bash">cupsenable ML320</syntaxhighlight>

*https://groups.google.com/forum/#!topic/beagleboard/Tn-rQfOdEPg

*https://wiki.archlinux.org/index.php/CUPS_printer-specific_problems

=OSC messaging on the beaglebone=

*http://das.nasophon.de/pyliblo/

*http://liblo.sourceforge.net/

=Run a Script on Login (Start a Service)=

==Make a Shell Script==

'''launch_mirror.sh''' - launches my python script as detached screen session

#!/bin/bash

cd /home/root/convexmirror

/usr/bin/screen -dmS mirror /home/root/convexmirror/convex_mirror.py

</syntaxhighlight>

make the scrip user executable

chmod u+x

</syntaxhighlight>

==Make a Service==

make a service file:

vi /lib/systemd/system/cvxmirror.service

</syntaxhighlight>

'''cvxmirror.service''':

[Unit]

Description=Runs looping convex mirror code

After=syslog.target network.target

[Service]

Type=forking

ExecStart=/home/root/convexmirror/launch_mirror.sh

[Install]

WantedBy=multi-user.target

</syntaxhighlight>

make links:

cd /etc/systemd/system/

ln /lib/systemd/system/cvxmirror.service cvxmirror.service

</syntaxhighlight>

make system take notice:

systemctl daemon-reload

</syntaxhighlight>

start service manually:

systemctl start cvxmirror.service

</syntaxhighlight>

stop service manually:

systemctl stop cvxmirror.service

</syntaxhighlight>

enable on startup:

systemctl enable cvxmirror.service

</syntaxhighlight>

'''Run and don't exit'''

call bash afterwards. it will keep the screen process open

/usr/bin/screen -dmS printing bash -c '/home/debian/children/okidata_udp_server.py; exec bash'

</syntaxhighlight>

'''Run service on network boot'''

After=syslog.target network-online.target

</syntaxhighlight>

http://www.nunoalves.com/open_source/?p=308

http://kezhong.wordpress.com/2011/11/19/creating-my-own-systemd-service-files-on-fedora-16x86_64/

=Other=

*video on C++ programming with Beaglebone - http://www.youtube.com/watch?feature=endscreen&NR=1&v=vFv_-ykLppo

*Contest. Win 2 free beagleboards - http://elinux.org/BeagleBoard/contest

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Rtwomey

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BeagleBone

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