SDHI (Software Defined Hardware Interface) is a technology that combines the benefit of pure software interfaces with ease of use and tactile feedback of hardware interfaces. It models a hardware interface based on groups of controllers as commonly found on e.g. modular synthesizers.
Example of modular synthesizer, CC BY 3.0 Kimi95
This is achieved by replacing the traditional hardware faceplate with a matrix of displays. This matrix can be configured to display arbitrary faceplate graphics.
Example of early SDHI prototype, CC BY 3.0 Petter Arvidsson
It can be built like any pico project using cmake
mkdir build
cd build
cmake ..
There is a gdb command file included to make debugging using openocd easier. (It automatically connects openocd, no need to start it separately)
gdb-multiarch -x gdbcommands
...
blc
Where blc will build, load and start the process.