[[PageOutline]]

= Setup your computer =

== Fl-AIR directory ==

It is advised to put all Fl-AIR related stuffs in the same directory, for example $HOME/flair:
{{{
$ mkdir $HOME/flair
}}}

Then add an environment variable to your .bashrc with the path of this directory:
{{{
$ nano ~/.bashrc
}}}
and add
{{{
#!sh
# variable for Fl-AIR
export FLAIR_ROOT=$HOME/flair
}}}
reload the script
{{{
$ source ~/.bashrc
}}}

All Fl-AIR documentation, scripts and CMakeLists.txt will use this variable.

== Install packages ==

Install glxinfo needed to detect your graphic driver (for simulator):

{{{
sudo apt install mesa-utils
}}}

Install an optional IDE (''Integrated Development Environment''), for example:
 * !CodeLite (all Fl-AIR documentation is based on it):
   * Download the version corresponding to your OS : https://downloads.codelite.org/
   * If the downloaded file is .deb, run:
{{{
sudo opkg install filename.deb
}}}
 * or eclipse:
{{{
sudo apt-get install eclipse-cdt
}}}
 * or codeblocks (depreciated because of cmake and code completion problems, see next section if you want to use !CodeBlocks):
{{{
sudo apt-get install codeblocks codeblocks-contrib
}}}

== Codeblocks ==

=== if Codeblocks is slow or crashes ===

It seems that auto completion plugin of Codeblocks (version 12.11 and up) does not work very well with a cmake generated project. 
One solution is to deactivate this plugin, another solution is to install an older version of Codeblocks (10.05), from [http://sourceforge.net/projects/codeblocks/files/Binaries/10.05/ this page].
For example on a 64 bits computer:
{{{
$ cd
$ wget http://sourceforge.net/projects/codeblocks/files/Binaries/10.05/Linux%20%2864%20bit%29/codeblocks-10.05-1-debian-amd64.tar.bz2
$ tar -xjf codeblocks-10.05-1-debian-amd64.tar.bz2
$ cd amd64
$ sudo dpkg -i *.deb
$ cd ..
$ rm -rf amd64 codeblocks-10.05-1-debian-amd64.tar.bz2
}}}

=== environment variables===

When Codeblocks is not launched from command line, it does not read environment variables set in .bashrc.
This can make trouble when a CMakelists.txt is modified for example.

To solve this, go to ''settings/environment'' menu. Choose ''environment variables'' section on the left. Clic on ''Add'' and fill the form:
* key: FLAIR_ROOT
* value: path to the FLAIR_ROOT directory

== Use rtprio ==

In order to use FL-AIR without Xenoami, but with high priorities, you need to be root or to allow your user using the following file:
{{{
$ sudo nano /etc/security/limits.conf
}}}
And add these lines:
{{{
your_user		soft	rtprio		99
your_user               hard    rtprio          99
}}}
where ''your_user'' is your user login. Then logout and login.

== Setup bluetooth for DualShock3 controller (optional) ==

Using bluetooth for the ds3 is not conventional. Thus, you need a small modification in the linux's bleutooth service. You just have to do it once.

=== On newer distros (ubuntu >=16.4 or mint>=18) ===
{{{
$ sudo nano /etc/systemd/system/bluetooth.target.wants/bluetooth.service
}}}
And modify the ''!ExecStart'' value:
{{{
ExecStart=/usr/lib/bluetooth/bluetoothd --noplugin=input
}}}
Then restart the dameon bluetoothd:
{{{
$ sudo systemctl daemon-reload
$ sudo service bluetooth restart 
}}}
=== On older distros ===

{{{
$ sudo nano /etc/bluetooth/main.conf
}}}
and add a line to !DisablePlugins:
{{{
[General]
# List of plugins that should not be loaded on bluetoothd startup
DisablePlugins = network,input
}}}
Then restart bluetoothd:
{{{
$ sudo service bluetooth restart 
}}}

== Configure SSH hosts (optional) ==

Alias can be defined in the ''~/.ssh/config'' file: 

{{{
$ mkdir -p ~/.ssh
$ nano ~/.ssh/config
}}}
and add a line for each target
{{{
Host uav1
   HostName 192.168.147.63
   User root
   StrictHostKeyChecking no
   UserKnownHostsFile=/dev/null
}}}
change the name (uav1 in this example) and its address (192.168.147.63 in this example).

__NB__: the 2 last lines are optional, but it will help if you connect to 2 different targets with same IP. Yet, you will be exposed to the man in the middle attack (see [http://en.wikipedia.org/wiki/Man-in-the-middle_attack this page]), which should not be a big deal in our case (target as no root password...).

Using this alias you can connect to the target that way:
{{{
$ ssh uav1
}}}
which is equivalent to
{{{
$ ssh root@192.168.147.63
}}}
moreover, the command
{{{
$ scp toto uav1:
}}}
is equivalent to
{{{
$ scp toto root@192.168.147.63:
}}}