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Over 30 recipes to develop custom drivers for your embedded Linux applicationsKey FeaturesUse kernel facilities to develop powerful driversLearn core concepts for developing device drivers using a practical approachProgram a custom character device to get access to kernel internalsBook DescriptionLinux is a unified kernel that is widely used to develop embedded systems. As Linux has turned out to be one of the most popular operating systems worldwide, the interest in developing proprietary device drivers has also increased. Device drivers play a critical role in how the system performs and ensure that the device works in the manner intended. By exploring several examples on the development of character devices, the technique of managing a device tree, and how to use other kernel internals, such as interrupts, kernel timers, and wait queue, you’ll be able to add proper management for custom peripherals to your embedded system. You’ll begin by installing the Linux kernel and then configuring it. Once you have installed the system, you will learn to use different kernel features and character drivers. You will also cover interrupts in-depth and understand how you can manage them. Later, you will explore the kernel internals required for developing applications. As you approach the concluding chapters, you will learn to implement advanced character drivers and also discover how to write important Linux device drivers. By the end of this book, you will be equipped with the skills you need to write a custom character driver and kernel code according to your requirements. What you will learnBecome familiar with the latest kernel releases (4.19/5.x) running on the ESPRESSOBin devkit, an ARM 64-bit machineDownload, configure, modify, and build kernel sourcesAdd and remove a device driver or a module from the kernelUnderstand how to implement character drivers to manage different kinds of computer peripheralsGet well-versed with kernel helper functions and objects that can be used to build kernel applicationsGain comprehensive insights into managing custom hardware with Linux from both the kernel and user spaceWho this book is forThis book is for anyone who wants to develop their own Linux device drivers for embedded systems. Basic hands-on experience with the Linux operating system and embedded concepts is necessary.
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Master the art of developing customized device drivers for your embedded Linux systemsKey FeaturesStay up to date with the Linux PCI, ASoC, and V4L2 subsystems and write device drivers for themGet to grips with the Linux kernel power management infrastructureAdopt a practical approach to customizing your Linux environment using best practicesPurchase of the print or Kindle book includes a free eBook in the PDF formatBook DescriptionLinux is one of the fastest-growing operating systems around the world, and in the last few years, the Linux kernel has evolved significantly to support a wide variety of embedded devices with its improved subsystems and a range of new features. With this book, you’ll find out how you can enhance your skills to write custom device drivers for your Linux operating system. Mastering Linux Device Driver Development provides complete coverage of kernel topics, including video and audio frameworks, that usually go unaddressed. You’ll work with some of the most complex and impactful Linux kernel frameworks, such as PCI, ALSA for SoC, and Video4Linux2, and discover expert tips and best practices along the way. In addition to this, you’ll understand how to make the most of frameworks such as NVMEM and Watchdog. Once you’ve got to grips with Linux kernel helpers, you’ll advance to working with special device types such as Multi-Function Devices (MFD) followed by video and audio device drivers. By the end of this book, you’ll be able to write feature-rich device drivers and integrate them with some of the most complex Linux kernel frameworks, including V4L2 and ALSA for SoC.What you will learnExplore and adopt Linux kernel helpers for locking, work deferral, and interrupt managementUnderstand the Regmap subsystem to manage memory accesses and work with the IRQ subsystemGet to grips with the PCI subsystem and write reliable drivers for PCI devicesWrite full multimedia device drivers using ALSA SoC and the V4L2 frameworkBuild power-aware device drivers using the kernel power management frameworkFind out how to get the most out of miscellaneous kernel subsystems such as NVMEM and WatchdogWho this book is forThis book is for embedded developers, Linux system engineers, and system programmers who want to explore Linux kernel frameworks and subsystems. C programming skills and a basic understanding of driver development are necessary to get started with this book.
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Over 79 hands-on recipes for professional embedded Linux developers to optimize and boost their Yocto Project know-how About This Book Optimize your Yocto setup to speed up development and debug build issues Use what is quickly becoming the standard embedded Linux product builder framework—the Yocto Project Recipe-based implementation of best practices to optimize your Linux system Who This Book Is For If you are an embedded Linux developer with the basic knowledge of Yocto Project, this book is an ideal way to broaden your knowledge with recipes for embedded development. What You Will Learn Optimize your Yocto Project setup to speed up development and debug build issues Use Docker containers to build Yocto Project-based systems Take advantage of the user-friendly Toaster web interface to the Yocto Project build system Build and debug the Linux kernel and its device trees Customize your root filesystem with already-supported and new Yocto packages Optimize your production systems by reducing the size of both the Linux kernel and root filesystems Explore the mechanisms to increase the root filesystem security Understand the open source licensing requirements and how to comply with them when cohabiting with proprietary programs Create recipes, and build and run applications in C, C++, Python, Node.js, and Java In Detail 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. Style and approach This recipe-based book will guide you through all the development stages of an embedded Linux product design using the Yocto Project. Downloading the example code for this book You can download the example code files for all Packt books you have purchased from y...
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Linux is by far the most-used kernel on embedded systems. Thanks to its subsystems, the Linux kernel supports almost all of the application fields in the industrial world. This updated second edition of Linux Device Driver Development is a comprehensive introduction to the Linux kernel world and the different subsystems that it is made of, and will be useful for embedded developers from any discipline. You'll learn how to configure, tailor, and build the Linux kernel. Filled with real-world examples, the book covers each of the most-used subsystems in the embedded domains such as GPIO, direct memory access, interrupt management, and I2C/SPI device drivers. This book will show you how Linux abstracts each device from a hardware point of view and how a device is bound to its driver(s). You'll also see how interrupts are propagated in the system as the book covers the interrupt processing mechanisms in-depth and describes every kernel structure and API involved. This new edition also addresses how not to write device drivers using user space libraries for GPIO clients, I2C, and SPI drivers. By the end of this Linux book, you'll be able to write device drivers for most of the embedded devices out there.
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Unlock the full potential of Red Hat Enterprise Linux 9 with our comprehensive RHCSA course. From local installation to advanced user & package management, master essential Linux skills to excel in your certification and beyond.Key FeaturesComprehensive coverage of Red Hat Enterprise Linux 9, from installation to security.Detailed exploration of system processes, job scheduling, and package management.Practical exercises, do-it-yourself labs and review questions and answers.Book DescriptionEmbark on a journey through Red Hat Enterprise Linux 9, beginning with the basics of local installation and initial system interactions. Our course guides you through fundamental and advanced file management techniques, ensuring you can handle any file-related tasks with ease. Explore user management in-depth, from basic to advanced levels, providing you with the skills to manage users and groups effectively. Delve into the core aspects of the Linux operating system, including the Bash shell, process management, and job scheduling. Gain expertise in package management, both basic and advanced, to keep your system up-to-date and efficient. Understand the intricacies of the Linux boot process, system initialization, and system tuning to optimize performance and reliability. The course also covers essential networking concepts, including device management, connections, and hostname resolution. You'll learn to secure your system with SSH, firewall configuration, and SELinux. Additionally, explore storage management, local file systems, and swap configurations to ensure robust data handling. Finally, enhance your automation skills with shell scripting and containers, preparing you for modern DevOps environments.What you will learnInstall and configure Red Hat Enterprise Linux 9.Manage files and directories with advanced techniques.Implement user and group management effectively.Configure and manage network devices and connections.Secure your system using SSH, firewalls, and SELinux.Utilize containers for efficient application deployment.Who this book is forThis course is ideal for IT professionals aiming to solidify their expertise in Red Hat Enterprise Linux 9, including system administrators, network engineers, & IT managers seeking to enhance their skills for career advancement. It is also highly beneficial for aspiring Linux professionals preparing for the RHCSA certification, ensuring they gain the practical and theoretical knowledge required to excel. Developers looking to understand the server-side environment better, and DevOps engineers interested in mastering Linux for automation and orchestration tasks will find this course valuable.
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This book is written for students or professionals who quickly want to learn Linux Kernel programming and device driver development. Each chapter in this book is associated with code samples and code commentary so that the readers may quickly understand. It keeps driver design explanations simple and allows readers to modify them to add more features, error handling, and bug fixing.
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This book follows on from Linux Kernel Programming, helping you explore the Linux character device driver framework and enables you to write 'misc' class drivers. You'll learn how to efficiently interface with user apps, perform I/O on hardware memory, handle hardware interrupts, and leverage kernel delays, timers, kthreads, and workqueues.
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