FreeRTOS on Ambiq Apollo3 or 4 with GUI Userspace Apps

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Hi, I am researching the components needed to build a proof-of-concept solar powered linux laptop. I am researching lightweight desktop environments that use microkernels. Some RTOS’s like Contiki have some desktop apps https://en.wikipedia.org/wiki/Contiki#Features though I’d like to use FreeRTOS since it seems more established. I’d like to add a GUI using LVGL. I am considering using the ARM M4F on the Apollo3/4 board because of its power efficiency, and has been shown to run on solar power: https://github.com/tudssl/engage By adding a more developed desktop environment like QNX and lowest power external storage w/ xboot, a relatively small battery could be used to provide backup power but rely primarily on energy harvesting.

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Is it the GUI you are looking for specifically? FreeRTOS is used with several different ones, but doesn’t provide a GUI itself.

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Sorry, I worded that wrong. I meant is FreeRTOS able to add many of the features of a linux operating system like Tiny Core Linux, as loadable kernel modules (LKMs)? This would include a display server, which then could use any window managers like https://en.wikipedia.org/wiki/FLWM and FLTK.

I’m essentially describing a hybrid kernel, one that runs with less than 2MB of RAM, but only uses a certain number of device drivers at a time. I’ve found this company that does work on uClinux, Emcraft: https://www.electronicdesign.com/technologies/embedded-revolution/article/21795660/practical-advice-on-running-uclinux-on-cortexm3m4 and it kind of describes what I am looking for, but I am unsure if there are other OS’s that would be a more flexible kernel to start with.

Performance\Speed is a secondary priority, hence rebooting to load different drivers, if they cannot fit in 1.8MB RAM, would be completely considered.

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It would be interesting if Window, Icon Menu, Pointers could be added to a RTOS: WIMP (computing) - Wikipedia I found Contiki - Wikipedia

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Yes you could do that with FreeRTOS, but it would be rate and not off-the-shelf as it is not FreeRTOS’s intended use case.

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