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Embedded Linux: Hardware, Software, and Interfacing (Sams White Books)

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Excerpt

This is an exciting time. The proliferation of Internet technology has transformed our concept of information. 24 hours per day, people rely on network devices for business and personal use. Over time, this dependence will grow further. Today's network devices, such as servers, routers, and desktop computers, form the Internet's infrastructure. Tomorrow's devices will control your home's temperature, maintain inventory levels at your business, and monitor automobile traffic patterns. Only a handful of the billions of processors produced each year go into desktop or server computers. The remaining processors monitor and control other facets of the world.

Individuals and businesses want smart, network-connected, devices to improve their lives, their efficiency, and their bottom dollar. These devices must be simple to operate, reliable, and inexpensive. This is where Linux comes in. Advances in technology accompanied by competitive pricing allow Linux to move from the desktop and server environment to embedded devices. Linux offers reliability, features, open-source code, and a proven track record; these features make it perfectly suited for embedded system designs. In this book, you will find information to create an embedded Linux foundation. You can then extend this foundation in your own designs.

Benefits of This Book

When I first started researching material for this book, I assumed that online embedded Linux information was like other Linux information--plentiful and well documented. I quickly discovered that my assumption was wrong. I found embedded Linux documentation to be sparse, scattered, incomplete, and sometimes dated. This was discouraging and invigorating at the same time. Although I worried about being able to find adequate information, I was further convinced of the need for this book. People are designing embedded products with Linux, so the information and knowledge are out there; it just hasn't all been in one place until now.

As an instructor, I have determined that students best understand and retain theoretical concepts and ideas when accompanied by examples. When students see a concept in action--whether it is a robotic arm movement, a voltmeter reading, or an oscilloscope waveform--they're most likely to later apply that concept to solve their own problems. That's why this book is full of step-by-step examples. You will learn through the example and be able to apply that knowledge to your own designs.

What This Book Covers

This book includes a complete series of real-world interfacing examples designed to introduce embedded Linux from hardware and software perspectives. After you create an embedded Linux development environment, you will step through hardware and software interfacing examples, using asynchronous serial communication, the PC parallel port, USB, memory I/O, synchronous serial communication, and interrupts. All interfacing examples are then tied together using system integration. All this material is presented by using a winter resort automation project called Project Trailblazer. You can find the book's source code and scripts at www.embeddedlinuxinterfacing.com.

The following text briefly summarizes each chapter.

Chapter 1, "Introducing Embedded Linux," describes the brief history of Linux as an embedded operating system and the implications of using open-source software in product design.

Chapter 2, "System Architecture," introduces a winter resort automation project called Project Trailblazer and develops a series of project requirements. Project Trailblazer and its requirements form the basis for the book's interfacing examples.

Chapter 3, "Selecting a Platform and Installing Tool Sets," describes the process of platform selection. Four target boards--which use x86, StrongARM, and PowerPC processors--are selected for Project Trailblazer. This chapter then describes the creation of an embedded Linux development workstation called tbdev1. All the development tools are either installed or compiled, including the cross-compiled tool chain for the StrongARM and PowerPC processors.

Chapter 4, "Booting Linux," describes the Linux boot process, from power-on to the bash prompt. Using a minimum root filesystem, each target board is booted using Linux version 2.4.

Chapter 5, "Debugging," configures gdb and gdbserver for target board debugging over the Ethernet network. A cross-compiled version of helloworld is remotely executed and debugged.

Chapter 6, "Asynchronous Serial Communication Interfacing," describes the Linux serial port device driver for control of port signals and buffers. An RFID tag reader, an LCD display, and control circuitry are interfaced to the Linux serial port.

Chapter 7, "Parallel Port Interfacing," describes interfacing AC circuits to an x86 target board's parallel printer port. A custom device driver called helloworld_proc_module that uses a /proc directory entry is introduced.

Chapter 8, "USB Interfacing," describes connecting a camera and speakers for visual input and audio output to a target board's USB port.

Chapter 9, "Memory I/O Interfacing," describes interfacing AC circuits to the StrongARM and PowerPC target boards' CPU buses.

Chapter 10, "Synchronous Serial Communication Interfacing," describes SPI and I2C connections and communications. A low-cost SPI temperature sensor and I2C LED display driver are interfaced to the target boards.

Chapter 11, "Using Interrupts for Timing," describes Linux timing sources and the measurement of each target board's average interrupt latency. An event timer with 1ms accuracy is developed to measure race times.

Chapter 12, "System Integration," describes the creation of the Project Trailblazer database. Target and server bash scripts are developed, using this database for collection and distribution of temperature, image, and authentication data.

Chapter 13, "Final Thoughts," summarizes the interfacing projects and discusses embedded Linux topics that are not addressed elsewhere in the book.

Who This Book Is For

If you are a hardware engineer, software developer, system integrator, or product manager who's begun exploring embedded Linux for interfacing applications, then this book is for you. The book's comprehensive interfacing examples are simple, requiring only a basic understanding of digital logic design, C and bash programming, and Linux system administration.

Conventions Used in This Book

This book uses several common conventions to help teach embedded Linux.

The typographical conventions used in this book include the following:

  • Commands and computer output appear in a monospaced computer font.
  • Commands you type appear in a boldfaced computer font.
  • Italics are used to introduce you to new terms.

In addition to typographical conventions, this book includes tips, which look like this: TIP


Information that offers shortcuts and solutions to common problems is highlighted as a tip.

0672322269P03282002

Product Details

ISBN:
9780672322266
Author:
Hollabaugh, Craig
Author:
Hollabaugh, Dr Craig
Author:
Hollabaugh, Craig Ph.D.
Author:
Craig Hollabaugh Ph.D.
Publisher:
Addison-Wesley Professional
Location:
Boston
Subject:
Networking - General
Subject:
Operating Systems - UNIX
Subject:
Operating Systems - General
Subject:
Operating systems (computers)
Subject:
Operating Systems - LINUX
Subject:
Operating systems
Subject:
Embedded computer systems
Subject:
Linux
Copyright:
Edition Description:
Trade paper
Series:
Sams White Books
Series Volume:
2675
Publication Date:
March 2002
Binding:
TRADE PAPER
Grade Level:
Professional and scholarly
Language:
English
Illustrations:
Yes
Pages:
432
Dimensions:
9.06 x 7.36 x 0.9 in 694 gr

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Related Subjects

Computers and Internet » Computer Architecture » Microcontrolllers
Computers and Internet » Networking » General
Computers and Internet » Operating Systems » General
Computers and Internet » Operating Systems » Linux
Computers and Internet » Operating Systems » Unix » Unix Administration
Computers and Internet » Operating Systems » Unix » Unix and Linux Programming

Embedded Linux: Hardware, Software, and Interfacing (Sams White Books) Used Trade Paper
0 stars - 0 reviews
$62.95 In Stock
Product details 432 pages Addison-Wesley Professional - English 9780672322266 Reviews:
"Synopsis" by , A guide to using Linux on embedded platforms for interfacing to the real world. "Embedded Linux" is one of the first books available that teaches readers development and implementation of interfacing applications on an Embedded Linux platform.
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