Book Image

Hands-On Embedded Programming with Qt

By : John Werner
Book Image

Hands-On Embedded Programming with Qt

By: John Werner

Overview of this book

Qt is an open source toolkit suitable for cross-platform and embedded application development. This book uses inductive teaching to help you learn how to create applications for embedded and Internet of Things (IoT) devices with Qt 5. You’ll start by learning to develop your very first application with Qt. Next, you’ll build on the first application by understanding new concepts through hands-on projects and written text. Each project will introduce new features that will help you transform your basic first project into a connected IoT application running on embedded hardware. In addition to gaining practical experience in developing an embedded Qt project, you will also gain valuable insights into best practices for Qt development and explore advanced techniques for testing, debugging, and monitoring the performance of Qt applications. The examples and projects covered throughout the book can be run both locally and on an embedded platform. By the end of this book, you will have the skills you need to use Qt 5 to confidently develop modern embedded applications.
Table of Contents (22 chapters)
Free Chapter
1
Section 1: Getting Started with Embedded Qt
5
Section 2: Working with Embedded Qt
10
Section 3: Deep Dive into Embedded Qt
14
Section 4: Advanced Techniques and Best Practices
Appendix A: BigProject Requirements

Communicating using D-Bus

D-Bus is an interprocess communication system (IPC bus) that allows multiple processes to seamlessly communicate with each other. D-Bus is often used to allow daemons (lightweight service providers) and applications wishing to use them to communicate without knowing more than what service they need. In essence, it provides another level of abstraction. A typical setup might be to have a power monitor daemon that can notify when power is failing. Applications and other services that want to do something when power starts failing can find that daemon and use it without knowing how the daemon works. This allows the application to use different hardware as long as a power monitoring daemon is provided for it.

In the typical desktop environment, there are two D-Bus buses defined: the session and system buses. Since a bus is really just an instance of a D-Bus...