Difference between revisions of "BeagleBone"
From Robert-Depot
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==Make a Service== | ==Make a Service== | ||
| − | + | make a service file: | |
| + | <syntaxhighlight lang="bash"> | ||
vi /lib/systemd/system/cvxmirror.service | vi /lib/systemd/system/cvxmirror.service | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | '''cvxmirror.service''': | |
| + | <syntaxhighlight lang="bash"> | ||
[Unit] | [Unit] | ||
Description=Runs looping convex mirror code | Description=Runs looping convex mirror code | ||
| Line 173: | Line 175: | ||
WantedBy=multi-user.target | WantedBy=multi-user.target | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | make links: | |
| + | <syntaxhighlight lang="bash"> | ||
cd /etc/systemd/system/ | cd /etc/systemd/system/ | ||
ln /lib/systemd/cvxmirror.service cvxmirror.service | ln /lib/systemd/cvxmirror.service cvxmirror.service | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | make system take notice: | |
| + | <syntaxhighlight lang="bash"> | ||
systemctl daemon-reload | systemctl daemon-reload | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | start service manually: | |
| + | <syntaxhighlight lang="bash"> | ||
systemctl start cvxmirror.service | systemctl start cvxmirror.service | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | stop service manually: | |
| + | <syntaxhighlight lang="bash"> | ||
| + | systemctl stop cvxmirror.service | ||
| + | </syntaxhighlight> | ||
| + | enable on startup: | ||
| + | <syntaxhighlight lang="bash"> | ||
systemctl enable cvxmirror.service | systemctl enable cvxmirror.service | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Revision as of 11:45, 30 November 2013
Contents
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
want to allow processes to keep running?
OpenCV
python-opencv
- install python opencv bindings:
opkg install python-opencv
potrace
gphoto2
- install libusb-1.0-dev
opkg install libusb-1.0-dev
- download libgphoto2
- download gphoto2
- build and install libusb, libgphoto2, then gphoto2:
./configure
make
make install
GPIO
PyBBIO
other
gpio - http://beaglebone.cameon.net/home/using-the-gpios
Hardware
C920
capture
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:
- 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:
- Unzip:
tar -xzf sphinxbase-0.8.tar.gztar -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
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:
- 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
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/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
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
