Difference between revisions of "BeagleBone"

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(Hardware)
(Real Time Clock (RTC))
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=Hardware=
 
=Hardware=
 
==Real Time Clock (RTC)==
 
==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
 
*TinyRTC 1.1 - http://www.dfrobot.com/index.php?route=product/product&product_id=879#.UqdVqmT6f3E
 
**Remove RA1 to operate at 3.3V. (They are pullup resistors to 5V).  
 
**Remove RA1 to operate at 3.3V. (They are pullup resistors to 5V).  
 
*http://learn.adafruit.com/adding-a-real-time-clock-to-beaglebone-black/overview
 
*http://learn.adafruit.com/adding-a-real-time-clock-to-beaglebone-black/overview
 
  
 
==C920==
 
==C920==

Revision as of 10:57, 10 December 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.
  • 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.

What Kernel am I running

  • uname -a

other

Debugging

TTL Cable

954bbb_MED.jpg

(RED IS NOT CONNECTED)

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
./configure
make
make install

GPIO

PyBBIO

other

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

Hardware

Real Time Clock (RTC)

IMGP9616-600x600.jpg

C920

capture

streaming

dash cam

Servo

Serial Communication

Ubuntu

Angstrom

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

Pockesphinx

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

Curses

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

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/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