Changes

BeagleBone

7,762 bytes added, 05:46, 2 December 2015

→‎Hardware

=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:<syntaxhighlight lang="bash">opkg install ruby</syntaxhighlight>*install rmate on beaglebonei:<syntaxhighlight lang="bash">gem install rmate</syntaxhighlight>*setup ssh tunneling<syntaxhighlight lang="bash">ssh -R 52698:localhost:52698 pi@192.168.2.144</syntaxhighlight> ==Disable default services==<syntaxhighlight lang="bash">systemctl disable bone101 systemctl disable cloud9 systemctl disable gateone</syntaxhighlight> ==Copy OS to ~~Micro SD~~ microSD card==

*Download OS (.img.xz)

*unzip

*figure out what your card is. check df before and after inserting the card:**<~~code~~syntaxhighlight lang="bash">df -h</~~code~~syntaxhighlight>*unmount the drive:**<~~code~~syntaxhighlight lang="bash">diskutil unmountDisk /dev/disk2s1</~~code~~syntaxhighlight>

*copy image to drive:

**<~~code~~syntaxhighlight lang="bash">dd if=Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.12-beaglebone-2013.06.20.img of=/dev/rdisk2 bs=1m</~~code~~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/ :<syntaxhighlight lang="bash">cd /media/BEAGLEBONEmv 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<syntaxhighlight lang="bash">sudo ifup wlan0</syntaxhighlight>if it works...<syntaxhighlight lang="bash">sudo ifup wlan0ioctl[SIOCSIWAP]: Operation not permittedioctl[SIOCSIWENCODEEXT]: Invalid argumentioctl[SIOCSIWENCODEEXT]: Invalid argumentInternet Systems Consortium DHCP Client 4.2.2Copyright 2004-2011 Internet Systems Consortium.All rights reserved.For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/wlan0/80:1f:02:bf:23:52Sending on LPF/wlan0/80:1f:02:bf:23:52Sending on Socket/fallbackDHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5DHCPREQUEST on wlan0 to 255.255.255.255 port 67DHCPOFFER from 10.1.10.1DHCPACK from 10.1.10.1bound 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>

=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/~~medium~~large/~~954bbb_MED~~954bbb_LRG.jpg

(RED IS NOT CONNECTED)

**<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

=OpenCV=

==python-opencv==

*install python opencv bindings:**<~~code~~syntaxhighlight lang="bash">opkg install python-opencv</~~code~~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 install

</syntaxhighlight>

=Onboard LEDs=

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

=GPIO=

==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==

===~~capture~~software===*boneCV - https://github.com/derekmolloy/boneCV/===capturing===*capture 300 frames of H264 at 1920 x 1080 to output.raw:<syntaxhighlight lang="bash">capture -F -o -c 300 > output.raw</syntaxhighlight>*capture and convert with audio:<syntaxhighlight lang="bash">./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.mp4scp 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===<syntaxhighlight lang="bash">raw2mpg4</syntaxhighlight>or<syntaxhighlight lang="bash">ffmpeg -f h264 -i output.raw -vcodec copy output.mp4</syntaxhighlight> ===formats===<syntaxhighlight lang="bash">v4l2-ctl --list-formats-ext</syntaxhighlight>*set resolution:<syntaxhighlight lang="bash">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/

*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=

*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

Robert-Depot