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

Creating the raspberry-packt-image.bb image


Through out this chapter, our aim was to create a layer that can be reused in any environment. We'll see how to create our own image to be more dependent on images provided by the meta-raspberrypi BSP layer. There's no need to worry, because to create an image, we just need to make a recipe file.

Creating the environment

To separate the recipes of our layer, we will position our image recipe in a layer called recipe-core, where we will create our raspberry-packt-image.bb recipe file.  Here are the results of our layer after creating it:

$ tree meta-packt_rpi/
meta-packt_rpi/
├── conf
│   └── layer.conf
├── COPYING.MIT
├── README
├── recipes-core
│   └── images
│       ├── raspberry-packt-image.bb
├── recipes-custom
   └── gpio-packt
│       ├── gpio-packt
│       │   ├── fix.patch
│       │   └── gpio-example.c
│       └── gpio-packt.bb
├── recipes-example
│   └── example
│       ├── example-packt-0.1
│       │ ...