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Mastering Embedded Linux Development

Mastering Embedded Linux Development

By : Frank Vasquez, Mr. Chris Simmonds
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Mastering Embedded Linux Development

Mastering Embedded Linux Development

By: Frank Vasquez, Mr. Chris Simmonds

Overview of this book

Mastering Embedded Linux Development' is designed to be both a learning resource and a reference for your embedded Linux projects. The book starts by breaking down the fundamental elements that underpin all embedded Linux projects: the toolchain, the bootloader, the kernel, and the root filesystem. First, you will download and install a pre-built toolchain. After that, you will cross-compile each of the remaining three elements from scratch and learn to automate the process using Buildroot and the Yocto Project. The book progresses with coverage of over-the-air software updates and rapid prototyping with add-on boards. Two new chapters tackle modern development practices including Python packaging and deploying containerized applications. These are followed by a chapter on writing multithreaded code and another on techniques to manage memory in an efficient way. The final chapters demonstrate how to debug your code, whether it resides in user space or in the Linux kernel itself. In addition to GDB, the book also covers the different tracers and profilers that are available for Linux so that you can quickly pinpoint any performance bottlenecks in your system. By the end of this book, you will be able to create efficient and secure embedded devices with Linux that will delight your users.
Table of Contents (28 chapters)
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1
Part 1: Elements of Embedded Linux
7
Part 2: Building Embedded Linux Images
11
Part 3: System Architecture and Design Decisions
18
Part 4: Developing Applications
23
Part 5: Debugging and Optimizing Performance

Updating software with Docker

Balena uses Docker containers to deploy software updates. Devices run balenaOS, a Yocto-based Linux distribution that comes with balenaEngine, balena’s Docker-compatible container engine. OTA updates occur automatically by way of releases pushed from balenaCloud, a hosted service for managing fleets of devices. Balena can also operate in local mode so that updates originate from a server running on your local host machine rather than the cloud. We will stick to local mode for the following exercises.

Balena is written and supported by balena.io (https://balena.io). Like Mender, balenaCloud is a paid OTA update service. Your first ten devices are free, but you must adopt a monthly or yearly billing plan for anything beyond that. There is much more information about the software in the Reference section of the online docs at balena.io. We won’t dig into how balena works since our goal is to deploy and automatically update software on a...

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