VAR-SOM-MX6 Yocto GS eclipse

From Variscite Wiki
Programming with Eclipse and Yocto

Variscite added the required packages to the build images fsl-image-test and fsl-image-gui to enable Eclipse based Yocto development. This guide will describe how to install and use Eclipse/Yocto to develop application to run on VAR-SOM-MX6.
Detail information can be found:
http://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#application-development-workflow
We tried to make this wiki as simple as possible.

Host tools

Build

make sure you are your build directory and environment are set correctly.

$ . ./setup-environment build_mx6q/

Build the tools:

$ bitbake meta-ide-support
$ bitbake meta-toolchain adt-installer

The result are a tools installer

$ ls tmp/deploy/sdk/

The results should be:
adt_installer.tar.bz2 poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.1.sh

Install

$ tmp/deploy/sdk/poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.1.sh

When system prompt "Enter target directory for SDK (default: /opt/poky/1.5.1):" hit enter.

When system prompt "You are about to install the SDK to "/opt/poky/1.5.1". Proceed[Y/n]?" hit Y and enter.

An install log should look like:

 tmp/deploy/sdk/poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.5.1.sh
 Enter target directory for SDK (default: /opt/poky/1.5.1):
 You are about to install the SDK to "/opt/poky/1.5.1". Proceed[Y/n]?Y
 Extracting SDK...done
 Setting it up...done
 SDK has been successfully set up and is ready to be used.

Eclipse installation

The following steps will guide you how to download and install Eclipse Keler CDT SR1.

Download and install

Download from:

http://www.eclipse.org/downloads/download.php?file=/technology/epp/downloads/release/kepler/SR1/eclipse-cpp-kepler-SR1-linux-gtk-x86_64.tar.gz

$ cd ~/
$ tar xvf ../Downloads/eclipse-cpp-kepler-SR1-linux-gtk-x86_64.tar.gz

Run Eclipse:

$ eclipse/eclipse &

Set your workspace:
Eclipse ws.jpg
You can select any folder you like.
Close the "welcome window".
You should be at:
Eclipse main.jpg

Eclipse install additional packages

Based on: http://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#application-development-workflow

  1. Start the Eclipse IDE.
  2. Make sure you are in your Workbench and select "Install New Software" from the "Help" pull-down menu.
  3. Select Kepler - http://download.eclipse.org/releases/kepler from the "Work with:" pull-down menu.
  4. Expand the box next to "Linux Tools" and select the LTTng - Linux Tracing Toolkit boxes.
  5. Expand the box next to "Mobile and Device Development" and select the following boxes:
    1. C/C++ Remote Launch
    2. Remote System Explorer End-user Runtime
    3. Remote System Explorer User Actions
    4. Target Management Terminal
    5. TCF Remote System Explorer add-in
    6. TCF Target Explorer
  6. Expand the box next to "Programming Languages" and select the Autotools Support for CDT and C/C++ Development Tools boxes.
  7. Complete the installation and restart the Eclipse IDE.
Comment:
Some of the packages may be already installed.

An install window example:
Eclipse install add.jpg

Yocto plug-in

There are more then one option to get the plug-in. We selected to use: Pre-built Plug-in from the Yocto Project Eclipse Update Site

To install the Eclipse Yocto Plug-in from the update site, follow these steps:

  1. Start up the Eclipse IDE.
  2. In Eclipse, select "Install New Software" from the "Help" menu.
  3. Click "Add..." in the "Work with:" area.
  4. Enter http://downloads.yoctoproject.org/releases/eclipse-plugin/1.5/kepler in the URL field and provide a meaningful name in the "Name" field.
  5. Click "OK" to have the entry added to the "Work with:" drop-down list.
  6. Select the entry for the plug-in from the "Work with:" drop-down list.
  7. Check the boxes next to Yocto Project ADT Plug-in, Yocto Project Bitbake Commander Plug-in, and Yocto Project Documentation plug-in.
  8. Complete the remaining software installation steps and then restart the Eclipse IDE to finish the installation of the plug-in.

Eclipse install yoctop1.jpg

Configuring the Eclipse Yocto Plug-in

Configuring the Eclipse Yocto Plug-in involves setting the Cross Compiler options and the Target options. The configurations you choose become the default settings for all projects. You do have opportunities to change them later when you configure the project (see the following section). To start, you need to do the following from within the Eclipse IDE:

  • Choose "Preferences" from the "Windows" menu to display the Preferences Dialog.
  • Click "Yocto Project ADT".

Configuring the Cross-Compiler Options

To configure the Cross Compiler Options, you must select the type of toolchain, point to the toolchain, specify the sysroot location, and select the target architecture.

  • Selecting the Toolchain Type:

If you build your target based on Variscite WIKI your Toolchanin path will be /home/<uname>/var-som-mx6-dora-v3/build_mx6q. Otherwise point to your build folder.

  • Specify the Sysroot Location:

If you build your target based on Variscite WIKI your Toolchanin path will be /home/<uname>/var-som-mx6-dora-v3/build_mx6q/tmp/sysroots/varsommx6q. Otherwise point to your build folder.

This location is where the root filesystem for the target hardware resides.

  • Select the Target Architecture: The target architecture will be selected automatically based on your build.

Eclipse adt conf.jpg

Create and run simple application

Create the Project

You can create two types of projects: Autotools-based, or Makefile-based. This section describes how to create Autotools-based projects from within the Eclipse IDE. To create a project based on a Yocto template and then display the source code, follow these steps:

  • File->New->C Project
  • Click Yocto Project ADT Project.
  • Select Hello World ANSI C Autotools Project. This is an Autotools-based project based on a Yocto template.

Prj1.jpg

  • Put a name in the Project name: field. Do not use hyphens as part of the name.
  • Click "Next".
  • Add information in the Author and Copyright notice fields.
  • Be sure the License field is correct.

Prj2.jpg

  • Click "Finish".
  • If the "open perspective" prompt appears, click "Yes" so that you in the C/C++ perspective.
  • The left-hand navigation pane shows your project. You can display your source by double clicking the project's source file.
  • "hit Ctrl B" It will build your project.

Prj3.jpg

Create communication link

Using the console to your target set a password with "passwd" command. choose a simple one saying "root". The target should be connected to the network via Ethernet or WIFI. Use the "ifconfig" command to get the target ip address. From Eclipse

  • Window->Open Perspective->Other
  • Double click on Remote System Explorer

Tcf1.jpg

  • In the left bar right click and New->Connection
  • Choose TCF and Next

Tcf2.jpg

  • Set the Host name to the target IP

Tcf3.jpg

  • Hit Finish
  • On the left bar right click on the taget IP and select connect
  • Set "User ID:" to root, "Password:" to root and check the "Save password"

Tcf4.jpg

  • enter the root password again in the next poop up.

Once connected you can browse target file system, browse target process and lunch a terminal to the target.

Remote debug

Remote Run