Book Image

Rapid BeagleBoard Prototyping with MATLAB and Simulink

Book Image

Rapid BeagleBoard Prototyping with MATLAB and Simulink

Overview of this book

As an open source embedded single-board computer with many standard interfaces, Beagleboard is ideal for building embedded audio/video systems to realize your practical ideas. The challenge is how to design and implement a good digital processing algorithm on Beagleboard quickly and easily without intensive low-level coding. Rapid BeagleBoard Prototyping with MATLAB and Simulink is a practical, hands-on guide providing you with a number of clear, step-by-step exercises which will help you take advantage of the power of Beagleboard and give you a good grounding in rapid prototyping techniques for your audio/video applications. Rapid BeagleBoard Prototyping with MATLAB and Simulink looks at rapid prototyping and how to apply these techniques to your audio/video applications with Beagleboard quickly and painlessly without intensive manual low-level coding. It will take you through a number of clear, practical recipes that will help you to take advantage of both the Beagleboard hardware platform and Matlab/Simulink signal processing. We will also take a look at building S-function blocks that work as hardware drivers and interfaces for Matlab/Simulink. This gives you more freedom to explore the full range of advantages provided by Beagleboard. By the end of this book, you will have a clear idea about Beagleboard and Matlab/Simulink rapid prototyping as well as how to develop voice recognition systems, motion detection systems with I/O access, and serial communication for your own applications such as a smart home.
Table of Contents (15 chapters)
Rapid BeagleBoard Prototyping with MATLAB and Simulink
About the Authors
About the Reviewers

Chapter 5. Digital I/O and Serial Communication

In this chapter we will introduce how to utilize digital I/O and serial communication ports to drive external sensors, for example, an infrared (IR) sensor for motion detection in smart home applications. Driving sensors to collect data is an essential task in prototyping development. In this chapter's demo, an IR sensor is employed as the data acquisition input, driven by code that enables the system making use of the sensor data.

The following topics are discussed in detail:

  • Voltage shifting: Voltage conversion between the BeagleBoard and external devices

  • Digital I/O: Interfacing a device via the BeagleBoard's digital I/O

  • Serial communication: Interfacing a device via the BeagleBoard's serial port

  • Integration with data processing and control algorithms, and integrating a filtering algorithm when a motion is detected

Accordingly, we will demonstrate two different methods for driving sensors and acquiring data: using digital I/O in Simulink and writing...