Arduino

Arduino is an open source development platform using atmel microprocessors. This document describes how to use Arduino boards on Gentoo.

Prepare the kernel for USB connection
The arduino boards will be connected via USB to the computer. With this connection it is possible to write binaries to the atmega microprocessor and get debug messages from the board during run mode. Different boards have different USB interface chips. In case you prefer to use ICSP programming with an external adapter you don't need this for programming any more but eventually for debugging.
 * Arduino NG -> FTDI
 * Arduino MEGA and most of the others (8U2, 16U2, 32U4) -> CDC ACM


 * Arduino NANO use CH341 serial converter chip

After booting with the new kernel this can be tested after connecting the board to the computers USB port:

Every user who are privileged to connect to the board should be added to the uucp group.

Prepare the toolchain
Because we need to compile code into binaries for another target platform (Atmel AVR microprocessors) we have to install a cross development toolchain.

Recommended: Install the toolchain using crossdev
If you haven't already, check out the section on Creating a cross-compiler from the Embedded Handbook. This will give you a good introduction to crossdev and how it works.

Installing crossdev
Install crossdev if you don't have it. Should you have any issues, try upgrading to a more recent masked or unstable version.

Creating the local overlay
Before building the toolchain, you need to create a local overlay called crossdev.

Then instruct portage and crossdev to use this overlay:

Build and install the toolchain
OK, now you're all set. Build and install the AVR toolchain with this command:

In the event you have problems with the gcc stages, try:

Troubleshooting
You may also need a workaround so that the linking works as expected (see bug 147155).

For amd64:

Or x86:

Discouraged: Install non-Gentoo toolchain
Using the original Atmel AVR toolchain seems to be possible but not tested.

Using the Debian precompiled toolchain is described over here.

Using arduino IDE
The arduino IDE can be installed with:

After the start of arduino IDE (a link should be found in the application/development section of your start menu) the sketchbook location should be configured.

This is possible via the menu File/Preferences/Sketchbook location/.

Using eclipse IDE
After installing eclipse IDE you can choose between two eclipse plugins. Plugins can be installed via provided update sites. Simply add the given site via eclipse menu/help/software-updates/add-site.

Arduino Eclipse Extension
Arduino Eclipse Extension is a free eclipse plugin for arduino projects developed by Jantje. It depends on the installation of arduino IDE.

Use the update site "http://www.baeyens.it/eclipse/update" for the installation of a plugin version which is compatible with arduino 1.0.4 and eclipse helios and indigo.

Use the update site "http://www.baeyens.it/eclipse/V2" for installation of a plugin version which is compatible with arduino 1.5.x and eclipse juno.

AVR Eclipse Plugin
AVR Eclipse Plugin is a free eclipse plugin for developing boards with avr atmel microprocessors. It is not especially make for the arduino boards, but it can used for that. It is not necessary to install arduino IDE for using that plugin. More informations can be found on the wiki site.

Use the update site "http://avr-eclipse.sourceforge.net/updatesite/" for installation of the plugin which is known to work with eclipse helios.

udev rule for Arduino NG
This rule can be used to make an symlink, especially usefull in case of more than one arduino boards. For example create an file and add the line below:

udev rule for Arduino MEGA
This rule can be used to make an symlink, especially usefull in case of more than one arduino boards.

For example create an file and add the line below:

Problem with deprecated items in avr-libc v1.8.0 and above (and Mega 2560)
If you can see the messages below you have found this compatibility issue (arduino forum).

To fix this manipulate your at the third line:

External resources

 * Embedded Handbook - More information about embedded systems, cross compiling, and other related topics.
 * Guide for Gentoo on arduino main page (a bit outdated).
 * Arduino eclipse extension main site.
 * AVR section on old crossdev wiki page