[rzr]

NuttX worth considering if you're coming from Linux background, I liked it and related community, BTW they have a workshop later this year.

Back to the subject implementing drivers can be a good warmup exercise, you can get inspiration from hints I have shared:

https://rzr.github.io/rzr-presentations/docs/nuttx/

[fellerts]

How does it compare to e.g. Zephyr or other RTOSes?

[acassis]

I think the best way to compare is trying NuttX and others RTOSes on some supported board (raspberry pi pico, esp32-devkit, stm32f4discovery etc). As rzr said NuttX is easier for people with Linux background, because it is Linux-like. So the way you mount a MMC/SDCard is the same, the way you search for devices using i2ctool is the same, etc.

[yau8edq12i]

I'm not sure I follow. Why would I want to "use" an mcu board the same way I use my linux desktop? It's not like I'm going to dynamically mount an SD card from a CLI for such an embedded device. Or that I would want to have a CLI at all. It is designed for early prototyping?

[acassis]

You don't have to mount it dynamically if you don't want. You can use it in a very static way, like your baremetal way to do things. But you can also have option to do it dynamically, case you have different SDCards with different binaries to load (yes, NuttX support dynamic ELF loading as well).

[sitzkrieg]

Exactly. You can prototype heavily and make sure peripherals, firmware programming, etc is working/to your advantage before doing any pcb work

That said bigger mcu,mpu +fpga type devboards will still absolutely price out hobbyists

[pjmlp]

The best description is UNIX like, because NuttX is POSIX based, while many RTOS aren't.