Book Image

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By : Alex Gonzalez
Book Image

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By: Alex Gonzalez

Overview of this book

The Yocto Project has become the de facto distribution build framework for reliable and robust embedded systems with a reduced time to market.You'll get started by working on a build system where you set up Yocto, create a build directory, and learn how to debug it. Then, you'll explore everything about the BSP layer, from creating a custom layer to debugging device tree issues. In addition to this, you’ll learn how to add a new software layer, packages, data, scripts, and configuration files to your system. You will then cover topics based on application development, such as using the Software Development Kit and how to use the Yocto project in various development environments. Toward the end, you will learn how to debug, trace, and profile a running system. This second edition has been updated to include new content based on the latest Yocto release.
Table of Contents (13 chapters)
Title Page
Packt Upsell

Working with the Linux framebuffer

The Linux kernel provides an abstraction for the graphical hardware in the form of framebuffer devices. These allow applications to access graphics hardware through a well-defined API. The framebuffer is also used to provide a graphical console to the Linux kernel, so that it can, for example, display colors and a logo. In this recipe, we will explore how applications can use the Linux framebuffer to display graphics and video.

Getting ready

Some applications, especially in embedded devices, are able to access the framebuffer by mapping memory and accessing it directly. For example, the gstreamer framework is able to work directly over the framebuffer, as is the Qt graphical framework. Some applications, like the Qt framework, also include support for hardware acceleration-not only video but also 2D and 3D graphical acceleration provided through the OpenGL and OpenVG APIs.

How to do it...

The FSL community BSP layer provides a fsl-image-multimedia target image...