Bela

h1.  Compiling BeagleRT projects in Eclipse

This document contains information on how to compile the BeagleRT software and upload it onto the BeagleBone Black.

h2. Required tools

This document assumes you have the following tools installed:

h3. On Linux

* Working Linux system, either running natively or on a virtual machine

* Mercurial version control system (http://mercurial.selenic.com). Available as a package in most Linux distributions.

* arm-gcc hardfp compiler toolchain (i.e. @arm-linux-gnueabihf-gcc@ and similar. On Ubuntu, these can be installed from packages:

<pre>

sudo apt-get install gcc-arm-linux-gnueabihf

sudo apt-get install g++-arm-linux-gnueabihf

</pre>

* Eclipse IDE (http://www.eclipse.org), including the C/C++ development tools

* Xenomai libraries compiled for ARM hardfp _(details to come)_ ( you can probably do something similar to what described below for MacOS, make sure you use the appropriate paths, which might differ from the ones below)

h3. On a 64bit MacOS X

*You can get the arm cross-compiler toolchain from here http://www.welzels.de/blog/projekte/arm-cross-toolchain/, which will place the binaries into your /usr/local/linaro/arm-linux-gnueabihf/bin/ folder

*xenomai  libraries and include files are already on the BBB's SD card. You can copy them over to your machine as follows:

<pre>

cd ~

ssh root@192.168.7.2 "cd /usr/; tar -zcvf ~/xenomai.tar.gz xenomai"

rsync -avz --remove-source-files bbb:xenomai.tar.gz .

cd  /usr/local/linaro/arm-linux-gnueabihf/include/

sudo tar -xvf ~/xenomai.tar.gz

sudo rm xenomai.tar.gz

</pre>

*Make sure that the following line is in your Eclipse project's includes

<pre>/usr/arm-linux-gnueabihf/include/xenomai/include</pre>

and the following line is in your Eclipse project's libraries search path

<pre>/usr/local/linaro/arm-linux-gnueabihf/include/xenomai/lib/</pre>

h3. Other operating systems

Find your own way and share it here or use the VirtualBox image provided [ask for link].

h2. Getting started

# Clone the BeagleRT files from the repository:

<pre>

hg clone https://code.soundsoftware.ac.uk/hg/beaglert

</pre>

# Launch Eclipse and select a workspace (creating one if necessary).

# In the Eclipse menu bar, choose _File -> Import..._. Within the dialog box that appears, choose _General -> Existing Projects into Workspace_. Click _Next_.

# Click the button _Select root directory_ and choose the path to the BeagleRT repository you just cloned.

# Make sure the @BeagleRT@ project is selected, and under Options, untick _Copy projects into workspace_. Click _Finish_ to complete the project import.

h2. Compiling the BeagleRT project

# In Eclipse, right-click on the @BeagleRT@ project folder in the left-hand column, and choose _Build Project_. (If you don't see the list of projects, make sure the C/C++ Perspective is active in Eclipse, and choose _Window -> Show View -> Project Explorer_.)

# The project should compile without errors, and the results should be visible in the Console tab (typically in the bottom pane of the window)

# If any errors arise, check that you have all the dependencies installed, both header files and libraries.

h2. Copying BeagleRT projects to the BeagleBone Black

# Once the project has compiled, open a terminal window and @cd@ to the directory where the binary was compiled. For example, if you installed BeagleRT in your home directory: @cd ~/BeagleRT/Release@

# Copy the BeagleRT executable to the BeagleBone Black using @scp@ (entering your BeagleBone Black password when prompted; you may need to create the @beaglert@ directory first):

<pre>

scp BeagleRT root@192.168.7.2:~/beaglert/

</pre>

# The first time you install BeagleRT, you also need to copy the @pru_rtaudio.bin@ file to the BeagleBone Black. This can be found at the top level of the BeagleRT repository, and it should be copied to the same directory on the BeagleBone where the BeagleRT executable is located:

<pre>

scp pru_rtaudio.bin root@192.168.7.2:~/beaglert/

</pre>

h2. Selecting different BeagleRT examples within the Eclipse project

The Eclipse project contains several examples within the @projects@ directory. Follow these steps to choose which one to compile:

# Only one of the folders within @projects@ should be enabled at a time. This one will be in solid black text; the remainder will be grey.

# Right-click on the folder which is currently enabled (solid black). Choose _Resource Configurations -> Exclude from Build..._

# Click _Select All_ to disable the code in this folder. Click _OK_.

# Now right-click on the folder which you want to enable. Choose _Resource Configurations -> Exclude from Build..._

# Click _Deselect All_ to enable the code in this folder. Click _OK_.

h2. Creating a new executable within the BeagleRT project

Duplicate one of the existing project folders using the following steps:

# Right-click the project folder you want to duplicate and select _Copy_.

# Right-click on the @projects@ folder and select _Paste_. It will ask you to type in a new name.

# Follow the steps above (_Resource Configurations_) to enable compiling this new project rather than any of the others.