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Yocto for Raspberry Pi

Yocto for Raspberry Pi

By : Pierre-Jean, Mabäcker
2 (4)
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Yocto for Raspberry Pi

Yocto for Raspberry Pi

2 (4)
By: Pierre-Jean, 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 (13 chapters)
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3
3. Mastering Baking with Hob and Toaster

Yocto Project - workflow

The following diagram represents the Yocto Project development environment at a high level in order to present the cross-compilation framework:

Yocto Project - workflow

Let's look at what the components in the diagram stand for:

  • * User Configuration: This is metadata you can use to control the build process.
  • * Metadata layers: These are various layers that provide software, machine, and distribution metadata.
  • * Source files: These contain upstream releases, local projects, and source control management (Git, SVN, and so on).
  • * Build system: These are processes under the control of BitBake. This block expands on how BitBake fetches source files, applies patches, completes compilation, analyzes output for package generation, creates and tests packages, generates images, and generates cross-development tools.
  • * Package feeds: These are directories containing output packages (RPM, DEB, or IPK), which are subsequently used in the construction of an image or SDK produced by the build system. These feeds can also be copied and shared using a web server or other means to facilitate extending or updating existing images on devices at runtime if runtime package management is enabled.
  • * Images: These are images produced by the development process (the pieces that compose the operating system, such as the kernel image, bootloader, and rootfs).
  • * Application development SDK: These are cross-development tools that are produced along with an image or separately with BitBake.
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