This was a long chapter with lots of theory and examples about buses on BeagleBone. We learned first that a bus is an interconnection of lines with software logic for data transfer. Different sensors/devices follow different set of rules for connection called bus protocols. The BeagleBone processor has support for UART devices and I2C, SPI buses. All these are serial protocols. We learned that UART is one-to-one connection carrying out asynchronous data transfer. Then we learned about the I2C and SPI bus. We wrote programs to read/write from UART, read from the ADXl345 sensor via I2C and displayed text on the Nokia LCD via SPI. We covered major buses supported by BeagleBone. Now, we will move to writing IoT programs in Python in the next chapter.
Programming the BeagleBone
By :
Programming the BeagleBone
By:
Overview of this book
The whole world is moving from desktop computers to smartphones and embedded systems. We are moving towards utilizing Internet of Things (IoT). An exponential rise in the demand for embedded systems and programming in the last few years is driving programmers to use embedded development boards such as Beaglebone.
BeagleBone is an ultra-small, cost-effective computer that comes with a powerful hardware. It runs a full-fledged Debian Linux OS and provides numerous electronics solutions. BeagleBone is open source and comes with an Ethernet port, which allows you to deploy IoT projects without any additions to the board. It provides plenty of GPIO, Anlaog pins, and UART, I2C, SPI pins which makes it the right choice to perform electronics projects. This gives you all the benefits of Linux kernel such as multitasking, multiusers, and extensive device driver support. This allows you to do programming in many languages including high-level languages such as JavaScript and Python.
This book aims to exploit the hardware and software capabilities of BeagleBone to create real-life electronics and IoT applications quickly. It is divided into two parts. The first part covers JavaScript programs. The second part provides electronics projects and IoT applications in Python.
First, you will learn to use BeagleBone as tool to write useful applications on embedded systems. Starting with the basics needed to set up BeagleBone and the Cloud9 IDE, this book covers interfacing with various electronics components via simple programs. The electronics theory related to these components is then explained in depth before you use them in a program. Finally, the book helps you create some real-life IoT applications.
Table of Contents (21 chapters)
Programming the BeagleBone
Credits
About the Author
Acknowledgment
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Cloud9 IDE
Blinking Onboard LEDs
Blinking External LEDs
Controlling LED Using a Push Button
Reading from Analog Sensors
PWM – Writing Analog Information
Internet of Things with BeagleBone
Physical Computing in Python
UART, I2C, and SPI Programming
Internet of Things using Python
GPIO Control in Bash
BeagleBone Capes
Pinmux and the Device Tree
Index
Customer Reviews