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

Monitoring Qt applications

In addition to debugging code, it is also useful to monitor the code to look for opportunities to improve performance or cases where memory usage can be reduced.

We will start by looking at Qt's logging capabilities.

Logging the Qt way

We have already met and discussed qDebug(), but there are other methods available for logging:

  • qDebug(): To log a debug message
  • qWarning(): To log a warning
  • qInfo(): To log an informational message
  • qCritical(): To log a critical message
  • qFatal(): To log a fatal message and exit

Controlling the logging format