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GNU/Linux Rapid Embedded Programming

You're reading from GNU/Linux Rapid Embedded Programming

Product type Book

Published in Mar 2017

Publisher Packt

ISBN-13 9781786461803

Pages 732 pages

Edition 1st Edition

Languages

Concepts

System Programming

Author (1):

Rodolfo Giometti

Table of Contents (26) Chapters

GNU/Linux Rapid Embedded Programming

Credits

About the Author

About the Reviewer

www.PacktPub.com

Customer Feedback

Preface

Installing the Developing System

Managing the System Console

C Compiler, Device Drivers, and Useful Developing Techniques

Quick Programming with Scripts and System Daemons

Setting Up an Embedded OS

General Purposes Input Output signals – GPIO

Serial Ports and TTY Devices - TTY

Universal Serial Bus - USB

Inter-Integrated Circuits - I2C

Serial Peripheral Interface - SPI

1-Wire - W1

Ethernet Network Device - ETH

Wireless Network Device - WLAN

Controller Area Network - CAN

Sound Devices - SND

Video devices - V4L

Analog-to-Digital Converters - ADC

Pulse-Width Modulation - PWM

Miscellaneous Devices

The root filesystem (rootfs)

The root filesystem (rootfs) is the main filesystem for an UNIX-like operative system. It contains the very critical files needed for the whole system to work (for instance, the init process), so if the root filesystem gets corrupted, the system will not work at all!

The root filesystem is the first filesystem the kernel mounts at boot, and it is never unmounted.

A rootfs can be used on several different types of storage devices (disks, flashes, and so on). A filesystem can stay in the RAM or even over the network, and according to the storage device where it's placed on, it can have different formats. This is because it has to take into account some special feature of the underlying storage media. In a typical GNU/Linux system, a rootfs type can be (mostly) EXT3/EXT4 or JFFS2/UBIFS. The first two formats are the standard Linux filesystems used into hard disks, USB storage devices, microSDs, and other block devices, while the JFFS2 and UBIFS are filesystems used...

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Authors (1)

Rodolfo Giometti

Rodolfo Giometti is an engineer, IT specialist, GNU/Linux expert and software libre evangelist. He is the author of the books BeagleBone Essentials, BeagleBone Home Automation Blueprints and GNU/Linux Rapid Embedded Programming by Packt Publishing and maintainer of the LinuxPPS projects. He still actively contributes to the Linux source code with several patches and new device drivers for industrial applications devices. During his 20+ years of experience, he has worked on the x86, ARM, MIPS, and PowerPC-based platforms. Now, he is the co-chief at HCE Engineering S.r.l., where he designs new hardware and software systems for the quick prototyping in industry environment, control automation, and remote monitoring.

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