Latest revision as of 21:46, 1 December 2015

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Setup

Change Hostname

sudo vi /etc/hostname

sudo vi /etc/hosts

Add public key

cat ~/.ssh/id_rsa.pub | ssh debian@beaglebone1.local "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys"

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

• install rmate on beaglebonei:

gem install rmate

• setup ssh tunneling

ssh -R 52698:localhost:52698 pi@192.168.2.144

Disable default services

systemctl disable bone101 
systemctl disable cloud9         
systemctl disable gateone

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

• unmount the drive:

diskutil unmountDisk /dev/disk2s1

• copy image to drive:

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

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

• 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

sudo ifup wlan0

if it works...

sudo ifup wlan0
ioctl[SIOCSIWAP]: Operation not permitted
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument
Internet Systems Consortium DHCP Client 4.2.2
Copyright 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:23:52
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
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.

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

• iwconfig
  

What Kernel am I running

• uname -a

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:

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

TTL Cable

• Install USB drivers
  • for os x - http://sourceforge.net/projects/osx-pl2303/
• Connect pins like so:

(RED IS NOT CONNECTED)

• From Terminal, start session:
  • screen /dev/cu.usbserial 115200
• 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

potrace

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

gphoto2

• install libusb-1.0-dev

opkg install libusb-1.0-dev

• 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

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)

• 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

• 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

convert to mpg4

raw2mpg4

or

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

formats

v4l2-ctl --list-formats-ext

• set resolution:

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

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:
  • wget https://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg#md5=fe1f997bc722265116870bc7919059ea
• install setuptools:
  • sudo sh setuptools-0.6c11-py2.7.egg
• install pyserial:
  • sudo easy_install pyserial

Angstrom

• update opkg:
  • opkg update
• install pyserial:
  • opkg install python-pyserial

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):
  • opkg install alsa-dev
• Get sphinxbase and pocketsphinx, preferrably putting them in a code directory:
  • wget http://sourceforge.net/projects/cmusphinx/files/sphinxbase/0.8/sphinxbase-0.8.tar.gz
  • wget http://sourceforge.net/projects/cmusphinx/files/pocketsphinx/0.8/pocketsphinx-0.8.tar.gz
• Unzip:
  • tar -xzf sphinxbase-0.8.tar.gz
  • tar -xzf pocketsphinx-0.8.tar.gz
• Generate configuration files. Configure without python. In the sphinxbase-0.8 directory:
  • ./autogen.sh --without-python

Supercollider

• http://supercollider.github.io/development/building-beagleboneblack.html

Audio

• purchase usb sound card.
• connect stereo microphone.
• record audio with arecord:
  • arecord -D sysdefault -t wav -c 2 -r 44100 -f S16_LE -v binaural2.wav
• play audio:
  • aplay binaural2.wav
• use the ALSA mixer to set recording levels, output levels, etc.:
  • alsamixer

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:
  • sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe restricted multiverse"
• list disks:
  • diskutil list

Curses

• install python-curses:
  • opkg install python-curses

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:

echo "I didn't realize it could be so fast" > /dev/usb/lp0

• print to lp from python:

lp = open("/dev/lp0","w")
lp.write("Hello World!\n")
lp.close()

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

CUPS on beaglebone

• Install CUPS:

opkg install cups

• List available printers:

lpinfo -v

• Add ML320 as new printer:

lpadmin -p ML320 -E -v usb://OKI%20DATA%20CORP/ML320/1TURBO

• Enable ML320:

cupsenable ML320

• 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

make the scrip user executable

chmod u+x

Make a Service

make a service file:

vi /lib/systemd/system/cvxmirror.service

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

make links:

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

make system take notice:

systemctl daemon-reload

start service manually:

systemctl start cvxmirror.service

stop service manually:

systemctl stop cvxmirror.service

enable on startup:

systemctl enable cvxmirror.service

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'

Run service on network boot

After=syslog.target network-online.target

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