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
Section 1: Getting Started with Embedded Qt
Section 2: Working with Embedded Qt
Section 3: Deep Dive into Embedded Qt
Section 4: Advanced Techniques and Best Practices
Appendix A: BigProject Requirements

Mocking the hardware

So far, everything we need to do can be done on both the host and target without any changes, but what if we need a special sensor, say a temperature sensor, that was only available on the target and not on the host? How could we check our code on the host?

The answer is mocking. You may have heard of a Mockingbird, or Mockingjay. They are birds that repeat what they hear. They mock, or pretend to be something else. We can do the same thing in software. If we can specify the interface (what inputs and outputs it uses), we can create something that acts just like the real thing for a controlled set of inputs.

Once we have a mock, we can test the rest of our system against the mock and verify whether the rest of the system sends the expected signals and handles the responses correctly. We could even generate error or fault responses without having to create...