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Embedded Linux Development with Yocto Project

By : Otavio Salvador

3.9 (20)

Embedded Linux Development with Yocto Project

3.9 (20)

By: Otavio Salvador

Overview of this book

A practical tutorial guide which introduces you to the basics of Yocto Project, and also helps you with its real hardware use to boost your Embedded Linux-based project. If you are an embedded systems enthusiast and willing to learn about compelling features offered by the Yocto Project, then this book is for you. With prior experience in the embedded Linux domain, you can make the most of this book to efficiently create custom Linux-based systems.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Meeting the Yocto Project

1. Meeting the Yocto Project

What is the Yocto Project?

Delineating the Yocto Project

Understanding Poky

The alliance of OpenEmbedded Project and Yocto Project

Summary

2. Baking Our Poky-based System

2. Baking Our Poky-based System

Configuring a host system

Downloading the Poky source code

Preparing the build environment

Knowing the local.conf file

Building a target image

Running images in QEMU

Summary

3. Using Hob to Bake an Image

3. Using Hob to Bake an Image

Building an image using Hob

Customizing an image with Hob

Summary

4. Grasping the BitBake Tool

4. Grasping the BitBake Tool

Understanding the BitBake tool

Exploring metadata

Parsing metadata

Dependencies

Preferring and providing recipes

Fetching the source code

Understanding BitBake's tasks

Generating a root filesystem image

Summary

5. Detailing the Temporary Build Directory

5. Detailing the Temporary Build Directory

Detailing the build directory

Constructing the build directory

Exploring the temporary build directory

Understanding the work directory

Understanding the sysroot directories

Summary

6. Assimilating Packaging Support

6. Assimilating Packaging Support

Using supported package formats

Understanding shared state cache

Explaining package versioning

Package feeds

Summary

7. Diving into BitBake Metadata

7. Diving into BitBake Metadata

Using metadata

Working with metadata

Summary

8. Developing with the Yocto Project

8. Developing with the Yocto Project

Deciphering the software development kit

Working with the Poky SDK

Developing applications on the target

Integrating with Eclipse

Summary

9. Debugging with the Yocto Project

9. Debugging with the Yocto Project

Differentiating metadata and application debugging

Tracking image, package, and SDK contents

Debugging packaging

Logging information during task execution

Utilizing a development shell

Using the GNU Project Debugger for debugging

Summary

10. Exploring External Layers

10. Exploring External Layers

Powering flexibility with layers

Detailing the layer's source code

Adding meta layers

Summary

11. Creating Custom Layers

11. Creating Custom Layers

Making a new layer

Adding metadata to the layer

Creating an image

Adding a package recipe

Writing a machine definition

Using a custom distribution

Machine features versus distro features

Understanding the variables scope

Summary

12. Customizing Existing Recipes

12. Customizing Existing Recipes

Common use cases

Adding extra options to recipes based on Autoconf

Applying a patch

Adding extra files to the existing packages

Changing recipe feature configuration

Customizing BusyBox

Customizing the linux-yocto framework

Summary

13. Achieving GPL Compliance

13. Achieving GPL Compliance

Understanding copyleft

Managing software licensing with Poky

Using Poky to achieve copyleft compliance

Summary

14. Booting Our Custom Embedded Linux

14. Booting Our Custom Embedded Linux

Exploring the Wandboard

Discovering Freescale ARM BSP

Using Wandboard with the Yocto Project

Building an image for Wandboard

Booting Wandboard from the SD card

Summary

A. References

A. References

Index

Index

Customer Reviews

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What is the Yocto Project?

The Yocto Project is a Linux Foundation workgroup defined as:

"The Yocto Project provides open source, high-quality infrastructure and tools to help developers create their own custom Linux distributions for any hardware architecture, across multiple market segments. The Yocto Project is intended to provide a helpful starting point for developers."

The Yocto Project is an open source collaboration project that provides templates, tools, and methods to help us create custom Linux-based systems for embedded products regardless of the hardware architecture. Being managed by a Linux Foundation fellow, the project remains independent of its member organizations that participate in various ways and provide resources to the project.

It was founded in 2010 as a collaboration of many hardware manufacturers, open source operating systems, vendors, and electronics companies in an effort to reduce their work duplication, providing resources and information catering to both new and experienced users.

Among these resources is OpenEmbedded-Core, the core system component, provided by the OpenEmbedded project.

The Yocto Project is, therefore, a community open source project that aggregates several companies, communities, projects, and tools, gathering people with the same purpose to build a Linux-based embedded product; all these components are in the same boat, being driven by its community needs to work together.

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