Book Image

Embedded Linux Development Using Yocto Project - Third Edition

By : Otavio Salvador, Daiane Angolini
Book Image

Embedded Linux Development Using Yocto Project - Third Edition

By: Otavio Salvador, Daiane Angolini

Overview of this book

The Yocto Project is the industry standard for developing dependable embedded Linux projects. It stands out from other frameworks by offering time-efficient development with enhanced reliability and robustness. With Embedded Linux Development Using Yocto Project, you’ll acquire an understanding of Yocto Project tools, helping you perform different Linux-based tasks. You’ll gain a deep understanding of Poky and BitBake, explore practical use cases for building a Linux subsystem project, employ Yocto Project tools available for embedded Linux, and uncover the secrets of SDK, recipe tool, and others. This new edition is aligned with the latest long-term support release of the aforementioned technologies and introduces two new chapters, covering optimal emulation in QEMU for faster product development and best practices. By the end of this book, you’ll be well-equipped to generate and run an image for real hardware boards. You’ll gain hands-on experience in building efficient Linux systems using the Yocto Project.
Table of Contents (20 chapters)

Using runqemu capabilities

QEMU is deeply integrated into the Yocto Project, and it is crucial to learn how to take advantage of this integration so we can plan the testing of our projects. The runqemu usage lists the variety of options available, which you can see in the following figure:

Figure 16.1 – The runqemu usage

Figure 16.1 – The runqemu usage

There are a few use cases of QEMU that are important to highlight:

  • Allows choosing different kernel images for testing
  • Allows choosing different rootfs for booting
  • The capability to pass boot arguments for the kernel
  • Supports the use of a graphical environment with OpenGL or OpenGL ES options
  • It can pass extra QEMU command-line parameters
  • Allows the use of serial console-only for rapid image testing
  • Testing the audio stack support
  • Testing different init systems (e.g., systemd)

In the following few sections, we use the qemux86-64 machine as a reference to cover some common use cases, illustrating...