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  • Book Overview & Buying Beaglebone Essentials
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Beaglebone Essentials

Beaglebone Essentials

By : Rodolfo Giometti
5 (2)
Buy this Book
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Beaglebone Essentials

Beaglebone Essentials

5 (2)
By: Rodolfo Giometti
Buy this Book

Overview of this book

If you are a developer with some hardware or electrical engineering experience who wants to learn how to use embedded machine-learning capabilities and get access to a GNU/Linux device driver to collect data from a peripheral or to control a device, this is the book for you.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Installing the Developing System
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1. Installing the Developing System
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Embedded world terms
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A system overview
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Checking out the preloaded tools
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Setting up a developing system
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(Re)Installing Debian
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Summary
2
2. Managing the System Console
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2. Managing the System Console
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Getting access to the serial console
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Basic system management
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A quick tour of the bootloader
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Summary
3
3. Compiling versus Cross-compiling
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3. Compiling versus Cross-compiling
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Native compilation versus cross-compilation
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Compiling a user-space software package
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Compiling the kernel
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Summary
4
4. Quick Programming with Scripts
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4. Quick Programming with Scripts
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The GPIO subsystem
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Managing an LED in PHP
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Managing an LED in Python
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Managing an LED in Bash
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Summary
5
5. Device Drivers
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5. Device Drivers
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What is a device driver?
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The modutils
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Writing our own device driver
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Summary
6
6. Serial Ports and TTY Devices
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6. Serial Ports and TTY Devices
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What is a serial port?
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Implementation of serial ports
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The serial ports in Linux
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The communication parameters
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A simple serial echo
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Managing a real device
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Summary
7
7. Universal Serial Bus – USB
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7. Universal Serial Bus – USB
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What is the Universal Serial Bus?
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The electrical lines
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The USB bus in Linux
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Accessing the raw bus
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Summary
8
8. Inter-integrated Circuit – I2C
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8. Inter-integrated Circuit – I2C
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What is the I2C bus?
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The electrical lines
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The I2C bus in Linux
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Getting access to I2C devices
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Accessing the bus directly
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Summary
9
9. Serial Peripheral Interface – SPI
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9. Serial Peripheral Interface – SPI
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What is the SPI bus?
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The electrical lines
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Getting access to the SPI devices
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Accessing the raw bus
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Summary
10
10. 1-Wire Bus – W1
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10. 1-Wire Bus – W1
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What is the 1-Wire bus?
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The electrical lines
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The 1-Wire bus in Linux
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Getting access to 1-Wire devices
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Summary
11
11. Useful System Daemons
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11. Useful System Daemons
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What is a daemon?
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Useful and ready-to-use daemons
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Writing a custom daemon
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Summary
12
Index
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Index

The I2C bus in Linux

Each I2C device has a well-defined 7 bit address that the master must use in order to communicate with a device. This address is not assigned at runtime and, as for the USB devices, it's assigned by the board designer by setting chip's pins.

Tip

Typically, the chip manufacturer sets the most significant 3 or 4 bits, and the board designer can set the remaining bits in order to suit his/her needs.

Another thing to be outlined regarding the I2C bus is that for each message, the master must specify whether the message wants to read or write data from the slave. This special action is done by adding a final bit (the least significant bit) to the slave address, and the master uses 0 to write data and 1 to read data from the slave.

As for the USB bus, we still have two main actors: master and slave. So, in the kernel, we will find both the device driver types.

Regarding the I2C master device, there is nothing special to do here since the proper driver is already up and running...

CONTINUE READING
83
Tech Concepts
36
Programming languages
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Beaglebone Essentials
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