Software Development on Raspberry Pi
The project provides a flexible set of tools and a space where embedded developers worldwide can share technologies, software stacks, configurations, and best practices that can be used to create tailored Linux images for embedded and IOT devices, or anywhere a customized Linux OS is needed.
Qt is often used to develop graphic interfaces. Qt contains C ++ libraries for creating graphical interfaces that can be compiled on various operating systems.
Since this compilation requires a lot of computing power, it is advisable for processors with relatively little power to carry out the development and compilation on a host computer and only then to load the finished application onto the target computer.
Normally, if you create your custom linux image with Yocto for a Raspberry Pi, you also want to show a custom splash screen with a progress bar.
This is a guide for installing Raspberry Pi OS Lite on the Compute Module 4. As a work computer, I use Ubuntu 20, installed in a virtual machine.
This is a guide for cross-compiling Qt 5.15.2 for Raspberry Pi 4 and installing it on the Compute Module 4. It's an update to my blog post Qt on the Raspberry Pi 4, with the difference that this time I'm using Raspberry Pi OS Lite.
This is a guide for configuring the Qt-Creator to use cross-compiled Qt libraries for the Raspberry Pi 4 and to create applications for the Raspberry.
Recently I had to develop an application (kiosk system) for/on a Raspberry Pi 4. The special thing about it was that 2 touch monitors were to be connected via HDMI, which had to be rotated 90 degrees to the right. So portrait formats, 2 monitors on top of each other.
Rotating the screen and arranging it on top of each other did not cause any problems, as this is easily possible via the user interface - a "Raspbian Buster with desktop and recommended software" was installed.
Due to the frequent writing or overwriting of data, the lifespan of an SD card is affected.
For example, it is recommended to write temporary data (e.g. sensor values for comparative calculations) to a RAM disk for applications that often contain temporary data (e.g. sensor values for comparative calculations) that are no longer needed after a restart.
You can also use the USB-C interface of the Raspberry Pi 4, which is normally used for power supply, as a normal USB interface.
In this case, however, the Raspberry should supply power via the GPIO pins.
