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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
Author (1):
Rodolfo Giometti Rodolfo Giometti
Profile icon Rodolfo Giometti
LinkedIn
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.
See other products by 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

A quick tour into the bootloader

As stated at the beginning of this chapter, using the serial console, we can get access to the bootloader.

Actually, all the developer kits presented in this book have two bootloaders: a pre-bootloader or Secondary Program Loader (SPL), named MLO for the BeagleBone Black, boot.bin for SAMA5D3 Xplained, and SPL for the Wandboard, which initializes the hardware components, such as the RAM and some mass storage devices, and bootloader named U-Boot for all boards, which is the real bootloader that initializes almost all the peripherals and has support for, among other things, booting over network and a scriptable shell through which basic commands can be given. Now the one million dollar question is: why should a developer be able to manage the bootloader too?

Well the answers are more than one; however, the most important ones are:

  • By passing a well-formed command line to the kernel, we can change some functionalities in the running filesystem.

  • From the bootloader...

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Authors (1)

Profile icon Rodolfo Giometti
LinkedIn
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.
Read more
See other products by Rodolfo Giometti

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