To use a prebuilt firmware, you can just use What that does is:
uflash
, tested on Ubuntu 22.04:git clone https://github.com/bbcmicrobit/micropython
cd micropython
git checkout 7fc33d13b31a915cbe90dc5d515c6337b5fa1660
uflash examples/led_dance.py
- convert the MicroPython code to bytecode
- join it up with a prebuilt firmware that ships with uflash which contains the MicroPython interpreter
- flashes that
To build your own firmware see:
Got it working: Compile MicroPython code for Micro Bit locally on Ubuntu 22.04 with your own firmware