Book Image

Yocto for Raspberry Pi

By : TEXIER Pierre-Jean, Petter Mabäcker
Book Image

Yocto for Raspberry Pi

By: TEXIER Pierre-Jean, Petter Mabäcker

Overview of this book

The Yocto Project is a Linux Foundation workgroup, which produces tools (SDK) and processes (configuration, compilation, installation) that will enable the creation of Linux distributions for embedded software, independent of the architecture of embedded software (Raspberry Pi, i.MX6, and so on). It is a powerful build system that allows you to master your personal or professional development. This book presents you with the configuration of the Yocto Framework for the Raspberry Pi, allowing you to create amazing and innovative projects using the Yocto/ OpenEmbedded eco-system. It starts with the basic introduction of Yocto's build system, and takes you through the setup and deployment steps for Yocto. It then helps you to develop an understanding of Bitbake (the task scheduler), and learn how to create a basic recipe through a GPIO application example. You can then explore the different types of Yocto recipe elements (LICENSE, FILES, SRC_URI, and so on). Next, you will learn how to customize existing recipes in Yocto/OE layers and add layers to your custom environment (qt5 for example).
Table of Contents (18 chapters)
Yocto for Raspberry Pi
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
3
Mastering Baking with Hob and Toaster

Hob


In order to explore Hob, we will, through this section, sweep through the different essential steps for its proper functioning.

Preparing the environment for Hob

As in Chapter 2 , Building our First Poky Image for the Raspberry Pi, the first step is to initialize the environment. Recall this command:

$ source oe-init-build-env rpi-build

Once the command is launched, the terminal will be redirected to the rpi-build directory.

Running Hob

Now that we have initialized all the variables required to build, we can start the Hob interface with this command:

$ hob

Once you run this command, Hob will try to parse the configuration files (local.conf and bblayers.conf) in order to find the metadata available to create the image. After this step, you will see the interface launch screen, as shown here:

Now, we can choose the desired machine from the list offered by Hob. Select the raspberrypi machine.

Note

The machine option you choose corresponds to the MACHINE variable in the local.conf file.

You will...