Revision as of 11:44, 30 November 2013

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Setup

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.
• move the MLO file from /media/BEAGLEBONE/ to a safe place:

mkdir backup
mv /media/BEAGLEBONE/MLO backup

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

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

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

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

C920

capture

• https://github.com/derekmolloy/boneCV/

streaming

• 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

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

Run a Script on Login (Start a Service)

Make a Shell Script

launch_mirror.sh - launches a 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

1. make a service file:

   vi /lib/systemd/system/cvxmirror.service
   

2. 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
   

3. make links:

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

4. make system take notice:

   systemctl daemon-reload
   

5. start service manually:

   systemctl start cvxmirror.service
   

6. enable on startup:

   systemctl enable cvxmirror.service
   

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