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Raspberry PI scripts

These are different things I've developed playing with my raspberry pi. I bought a piglow and learned how to use it with a library.

piglow-daemon.py

This script is a simple daemon that starts up when my raspberry pi boots. It is a low distraction pulse. I wrote this before I found piglowd. I'll have to check out piglowd and see if I can get that working as well.

Prerequisites

Ensure that /etc/modules contains the following two lines.

i2c-dev
snd-bcm2835

Ensure that none of those modules is in /etc/modprobe.d/raspi-blacklist.conf. If they are then comment them out. Install required system packages.

sudo apt-get install python-smbus

Install the PyGlow python library into the system.

git clone https://github.com/benleb/PyGlow.git
cd PyGlow
sudo python setup.py install

Autostart the daemon on boot

Add daemon to system.

sudo ln -s /home/pi/git/home/raspi/piglow-daemon.py /etc/init.d/

Generate appropriate startup and shutdown links.

sudo update-rc.d piglow-daemon.py start

force-update-date.sh

Raspbian does a pretty poor job at time synchronization at startup. It does the best it can however it leaves much to be desired. I wrote this script to force update the date and time with us.pool.ntp.org.

Autostart time sync on boot

Add daemon to system.

sudo ln -s /home/pi/git/home/raspi/force-update-date.sh /etc/init.d/

Generate appropriate startup and shutdown links.

sudo update-rc.d force-update-date.sh start

Build Star Control 2

These instructions outline how to build the game Star Control 2 on a raspberry pi running Raspian.

#clone
cd ~/git
git clone http://git.code.sf.net/p/sc2/uqm sc2-uqm
cd sc2-uqm/sc2/
#install dependencies
sudo apt-get install -y gcc libsdl1.2-dev libsdl-image1.2-dev libogg-dev libvorbis-dev zlib1g-dev libmikmod-dev mikmod
#configure the build and install
LDFLAGS="-lm" ./build.sh uqm config
#build and install the game
./build.sh uqm install
#start the game
./uqm

Now enjoy the great Star Control 2 game! When building the game I chose the following options:

  1. Use optimized build instead of debug build.
  2. Install to the prefix /home/pi/usr instead of /usr/local/games because I am using an alternate disk with more space mounted on /home.

Star Control runs best with:

  • Raspberry Pi 2 or better.
  • 640x480 resolution using SDL framebuffer instead of OpenGL.

Autostart Kodi Media Center

Kodi (formerly XBMC) is a great way to use a Raspberry Pi. It turns your Pi into a complete media center PC. I have some special enhancements made just for Kodi.

I add delay-start-kodi.sh to .bashrc. This script will automatically start kodi after 5 seconds. However, in order for the script to work you must:

  • Use raspi-config to disable booting to GUI (I recommend autologin).

This script depends on building the getkey command because you're able to stop kodi from starting by holding the SHIFT key. If you're using setup.sh then it should set up your .bashrc as well as build getkey.

Kodi is best run without the GUI so that you can dedicate maximum resources to Kodi and video decoding rather than taking up memory with a GUI.

My favorite Pi programs

Besides my normal favorites such as vim I like keeping a list of very lightweight programs to use.

  • mirage - A simple graphics editor and viewer that is less than 100Kb.