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Mastering Embedded Linux Programming

Mastering Embedded Linux Programming

By : Frank Vasquez, Chris Simmonds
4.6 (23)
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Mastering Embedded Linux Programming

Mastering Embedded Linux Programming

4.6 (23)
By: Frank Vasquez, Chris Simmonds

Overview of this book

If you’re looking for a book that will demystify embedded Linux, then you’ve come to the right place. Mastering Embedded Linux Programming is a fully comprehensive guide that can serve both as means to learn new things or as a handy reference. The first few chapters of this book will break down the fundamental elements that underpin all embedded Linux projects: the toolchain, the bootloader, the kernel, and the root filesystem. After that, you will learn how to create each of these elements from scratch and automate the process using Buildroot and the Yocto Project. As you progress, the book will show you how to implement an effective storage strategy for flash memory chips and install updates to a device remotely once it’s deployed. You’ll also learn about the key aspects of writing code for embedded Linux, such as how to access hardware from apps, the implications of writing multi-threaded code, and techniques to manage memory in an efficient way. The final chapters demonstrate how to debug your code, whether it resides in apps or in the Linux kernel itself. You’ll also cover 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 Linux book, you’ll be able to create efficient and secure embedded devices using Linux.
Table of Contents (27 chapters)
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1
Section 1: Elements of Embedded Linux
10
Section 2: System Architecture and Design Decisions
18
Section 3: Writing Embedded Applications
22
Section 4: Debugging and Optimizing Performance

Probing SPI signals with a logic analyzer

Even if you succeeded in receiving NMEA from your GPS module, you should attach a logic analyzer such as the Saleae Logic 8 if you have one. Probing the SPI signals helps us understand how the SPI protocol works and acts as a powerful debugging aid when things go wrong. In this section, we will use a Saleae Logic 8 to sample the SPI signals between the BeagleBone Black and ZOE-M8Q. If something is noticeably off with any of the four SPI signals, then a logic analyzer should make that mistake readily apparent.

The Saleae Logic 8 requires a laptop or desktop computer with a USB 2.0 port. The Saleae Logic 1 software is available for Linux, Mac OS X, and Windows. There is an installdriver.sh script that comes with the Linux version of Logic that grants the software permission to access the device. Find that script in the Logic installation's Drivers directory and run it from the command line so that you do not need to launch Logic with...

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