Book Image

Hands-On Mobile and Embedded Development with Qt 5

By : Lorn Potter
Book Image

Hands-On Mobile and Embedded Development with Qt 5

By: Lorn Potter

Overview of this book

Qt is a world-class framework, helping you to develop rich graphical user interfaces (GUIs) and multi-platform applications that run on all major desktop platforms and most mobile or embedded platforms. The framework helps you connect the dots across platforms and between online and physical experience. This book will help you leverage the fully-featured Qt framework and its modular cross-platform library classes and intuitive APIs to develop applications for mobile, IoT, and industrial embedded systems. Considerations such as screen size, device orientation changes, and small memory will be discussed. We will focus on various core aspects of embedded and mobile systems, such as connectivity, networking, and sensors; there is no IoT without sensors. You will learn how to quickly design a flexible, fast, and responsive UI that looks great. Going further, you will implement different elements in a matter of minutes and synchronize the UI elements with the 3D assets with high precision. You will learn how to create high-performance embedded systems with 3D/2D user interfaces, and deploy and test on your target hardware. The book will explore several new features, including Qt for WebAssembly. At the end of this book, you will learn about creating a full software stack for embedded Linux systems using Yocto and Boot to Qt for Device Creation.
Table of Contents (23 chapters)
Title Page
Dedication
About Packt
Foreword
Contributors
Preface
Index

Embedded Linux


Embedded Linux devices come in many different sizes and varieties. Some may have app stores, but most don't. There are various methods to get the OS and apps on the devices.

OS deployment

The deployment of the operating system will on your device, as some embedded devices have very specific methods in which the operating system is deployed to the device. In the case of Raspberry Pi, it is easy to copy the image to an SD card and put that into the RPI and boot it up.

I have a script named writeIso that I use; it consists of two lines:

#!/bin/bash
sudo dd if=$1 of=$2 bs=4M status=progress

I run it something like this:

./writeIso /path/to/deviceImage.img /dev/sdc

 

Other devices may have a flash method, whereby the image gets copied directly onto the device. This can be as low-level as having to use JTAG, or it could be higher-level, such as using Android's adb command. Sometimes, you have to write the image to an SD card, put that into the device, and then, with some combination of...