As you can see the chip shortage recent years because of COVID-19, the ST MCUs are becoming expensive, which is not so friendly for DIYer like me.
There are other cheap MCU to replace STM32, while we need to do the porting work for each chip.
So I plan to run the autopilot firmware on linux, as the firmware like PX4 has supported linux and there are not extra work to be done for each chip(as long as it could run linux)
For now I use a allwinner chip (V3s) to do this work, which is still work in progress: