The Qt version of an embedded Linux system is tied to the Yocto version. Yocto 2.7 (Warrior) comes with Qt 5.12, Yocto 3.1 (Dunfell) with Qt 5.14, Yocto 3.2, 3.3 and 3.4 with Qt 5.15 . There is no Yocto version with Qt 6 yet. How can we build Qt 6.2 against the SDK of old Yocto versions?
Read More »Building Qt 6.2 For Old Yocto Versions
CMake uses Graphviz to generate dependency graphs between the targets of a CMake project like libraries and executables. The graphs help us get an idea of the software architecture and identify the dependency hot spots.
Read More »Visualising Module Dependencies with CMake and GraphvizI am using TDD to implement a hardware-independent mock QCanBusDevice. We can use MockCanBusDevice in unit, integration and acceptance tests – without access to a… Read More »A Mock QCanBusDevice for TDD
When I looked up the publishing date for this book, I was surprised to find out that the book is 11 years old. The content feels as if written today. The authors’ advice is as relevant as ever. I am sure that it will stay relevant at least for the next 10 years.
Read More »Book Review: “The Art of Readable Code” by Dustin Boswell and Trevor FoucherAlmost all companies I worked with over the last 25 years had an oversupply of non-technical managers and an undersupply of technical experts in leadership positions. These companies build products with less value for the users and take longer to do so. Apple shows that companies can succeed with a functional organisation, where experts lead experts.
Read More »Reading: How Apple Is Organized For InnovationAlthough Qt comes with a unit-test framework QuickTest for QML code, hardly any QML GUIs are unit-tested, let alone developed with TDD (test-driven development). One… Read More »Developing a QML Keypad with TDD
I gave a talk at Meeting Embedded 2021 on 4 November 2021. First, I introduced the hexagonal architecture (a.k.a. ports-and-adapters architecture) in general. Then, I showed a walking skeleton of the architecture for a harvester terminal.
Read More »My Talk “Hexagonal Architecture: The Standard for Qt Embedded Applications” at Meeting Embedded 2021It depends! If a C++ source file includes the header inside an extern "C" section, the header is compiled as C++. If a C source file includes the header, the header is compiled as C. Hence, the header file should be both valid C and valid C++.
Creating an architecture means answering many questions about the ecosystem, in which the Qt embedded system operates. While the questions are very similar for all Qt embedded systems, the answers and their priorities differ. So, you should be able to transfer the questions and answers from my running example, a harvester terminal, to your system.
Read More »My Talk “A Successful Architecture for Qt Embedded Systems” at Qt Day Italy 2021