Getting your Raspberry Pi ready for openFrameworks

Install Raspbian "wheezy"

  1. Install the latest Raspbian (Debian Wheezy) image from the Raspberry Pi downloads page
  2. Follow the instructions at Raspberry Pi Preparing Your SD Card to get Raspbian installed onto your SD Card

Configure the Raspberry Pi

This guide assumes you are starting from a fresh Raspian install and that you are able to connect to the Raspberry Pi to give it commands.

Options to give commands are:

  1. SSH into the Pi from a different computer
  2. Attach a keyboard and monitor to the Pi.
    • If the Pi boots to the command prompt you are ready to go
    • If the Pi boots the X11 window system, open up LXTerminal from the shortcut on the Raspberry Pi Desktop

With a fresh install the Raspberry Pi configuration is presented at the first boot. Otherwise, you can re-configure with the command sudo raspi-config We need to make sure the CPU has 192MB of RAM in order to compile openFrameworks. Once you have compiled openFrameworks you may want to repeat this step with 128 0. Select 1 Expand Filesystem and hit Enter 0. Select 8 Advanced Options and hit Enter * Select A3 Memory Split and hit Enter * Type 64 and Hit <ok>

  1. Reboot when prompted or type sudo reboot
  2. Assuming you have internet access run these commands to update the software to the latest packages.
    • sudo apt-get clean
    • sudo apt-get update
    • sudo apt-get upgrade
    • Note: The above steps may take a little while.

Download openFrameworks

You now can download the Linux armv6 version of openFrameworks and uncompress it into a folder. Using a Shell, The following commands will download openFrameworks and uncompress it into the folder /home/pi/openFrameworks

  1. cd
  2. curl -O
  3. mkdir openFrameworks
  4. tar vxfz of_v0.8.4_linuxarmv6l_release.tar.gz -C openFrameworks --strip-components 1

Compile openFrameworks:

This step will take approximately 1 hour when compiling on the Raspberry Pi, Make sure you didn't skip the Memory Split step in the above section Configure the Raspberry Pi or it will eventually fail.

Assuming openFrameworks is located at /home/pi/openFrameworks run the following commands to install the necessary packages and compile openFrameworks.

  1. cd /home/pi/openFrameworks/scripts/linux/debian_armv6l
  2. sudo ./

You are now ready to compile openFrameworks!

  1. make Release -C /home/pi/openFrameworks/libs/openFrameworksCompiled/project

Speeding up compiling

Compiling natively on the Raspberry Pi takes a long time. openFrameworks applications typically take much less time than the core library. Taking the time to set up a cross-compiling solution will save you enormous amounts of time.

Raspberry Pi DISTCC Guide
Raspberry Pi Cross Compiling Guide

Compile your first app

Like on other platforms, openFrameworks ships with a bunch of examples located in the openFrameworks/examples folder. Inside examples the projects are sorted by the categories:

  • 3d
  • addons
  • communication
  • empty
  • events
  • gl
  • gles
  • graphics
  • gui
  • math
  • sound
  • utils
  • video

Inside each category folder are a few examples of each. To run them you need to go into the folder, build and run.

For example, here is how you build and run the polygonExample:

  • cd /home/pi/openFrameworks/examples/graphics/polygonExample
  • make
  • make run

To create your own project from scratch, copy examples/empty/emptyExample into apps/myApps/yourProjectName folder and start from there

For example:

  • cp -R /home/pi/openFrameworks/examples/empty/emptyExample /home/pi/openFrameworks/apps/myApps/myRpiApp
  • cd /home/pi/openFrameworks/apps/myApps/myRpiApp
  • make
  • make run

It is critical to keep your application directory 3 levels below the openFrameworks directory.

Have fun! :)