The app creation process of AsteroidOS needs a Software Development Kit generated by OpenEmbedded. You can either grab a prebuilt SDK for the nightlies here and install it on your system or you can build it yourself as follows:
Alternatively you can also build the toolchain from source. If you’ve already got an OpenEmbedded build directory via the Building AsteroidOS page, cd to that directory. Else, create one with:
git clone https://github.com/AsteroidOS/asteroid cd asteroid/
Then, build the cross compilation toolchain with:
source ./prepare-build.sh dory bitbake meta-toolchain-qt5
Assuming you already prepared a docker build environment like in: Building AsteroidOS.
sudo docker rm -f asteroidos-toolchain ; sudo docker run --name asteroidos-toolchain -it -v /etc/passwd:/etc/passwd:ro -u "$(id -u):$(id -g)" -v "$HOME/.gitconfig:/$HOME/.gitconfig:ro" -v "$(pwd):/asteroid" asteroidos-toolchain bash -c "source ./prepare-build.sh dory && bitbake meta-toolchain-qt5"
If you downloaded a prebuilt SDK, run the downloaded script. If you followed the previous steps, this will have generated the same installation script in
tmp-glibc/deploy/sdk/, you can run it as follows:
This script will install the cross-compiler and ARM libraries in
/usr/local/oecore-x86_64 by default, along with a script that needs to be sourced before every build. If you want to build a simple project via the terminal, this can be done like that:
source /usr/local/oecore-x86_64/environment-setup-armv7vehf-neon-oe-linux-gnueabi cmake -B build cmake --build build
Before running QtCreator you must run the previously mentioned script:
source /usr/local/oecore-x86_64/environment-setup-armv7vehf-neon-oe-linux-gnueabi qtcreator
This can be done automatically by prepending
source /usr/local/oecore-x86_64/environment-setup-armv7vehf-neon-oe-linux-gnueabi before
Now that you are in QtCreator go to ‘Tools->Options->Devices‘
- Add a new Generic Linux Device.
- Name it "AsteroidOS Watch".
- Choose 192.168.2.15 as IP address.
- Use root as user.
- Choose Password authentication and leave the password field empty.
Under the 'Kits' add a kit with the previously defined device:
Generic Linux Device.
- Set the
- Set the sysroot to
- In the CMake generator change the
System CMake at /usr/local/oecore-x86_64/usr/bin/cmake
- Clear the
Asteroid-helloworld can act as a cool QML demo app to make your first steps into AsteroidOS development easier. You can clone it, build it, install it and then modify it to follow your needs:
git clone https://github.com/AsteroidOS/asteroid-helloworld cd asteroid-helloworld/ source /usr/local/oecore-x86_64/environment-setup-armv7vehf-neon-oe-linux-gnueabi qtcreator CMakeLists.txt
Try to build and deploy the app. If it wasn’t already installed, a new icon should have already appeared on asteroid-launcher.
You can start by modifying occurrences of “asteroid-helloworld” to your app’s name. Then you can change the *.desktop file which describes the icon on the apps launcher. Then modify main.qml to describe your UI. To get started with QML development you can read the official tutorial.
Open the project as described in the previous sections.
- Click on the
Projectsbutton on the left sidebar.
- Under the
Build & Runsection click on the
Runconfiguration. This opens all run settings.
- Scroll down to the
Change the following 'Run' settings:
- Set the
Custom Executable (on AsteroidOS Watch).
- Set the
invoker. Add the
--single-instance --type=qtcomponents-qt5 /usr/local/bin/asteroid-helloworldcommand line arguments.
Change the following 'Environment' variables:
XDG_RUNTIME_DIRand set its value to
/run/user/1000. So that the invoker works under the root user.
- (Optional) Add
1. To make the app full screen and hide the titlebar.
Your app should now be able to run from the application when you click the start button in the bottom left sidebar.
If you want to start your app from the command line, open a shell with SSH, connect to ceres and use invoker:
invoker --type=qtcomponents-qt5 /usr/bin/asteroid-stopwatch
If you want to disable screen locking for easier development you can enable the demo mode of mce as root with:
mcetool -D on