nxos

An embedded operating system toolkit for LEGO MINDSTORMS NXT.

This project is forked from nxos, developed by David Anderson and others.

This fork updates it to make it work on today's computers.

Requirements

GNU ARM Embedded Toolchain v10-2020-q4 or similar. This repository assumes that arm-none-eabi-gcc is on your path.
Python 3.8 or newer.
Poetry v1.x.
Pybricksdev udev rules
See this guide for tips, tricks and useful references.

Building

poetry install
poetry shell
cd nxos
scons appkernels=examples/sound

This builds sound_samba.bin which can run from RAM, and sound_rom.bin which can be installed on flash.

Deploying

First, put the NXT in update (SAMBA) mode:

Press and hold the small button in the LEGO Technic pin hole under the USB port for 5 seconds.
Turn the hub on. You will hear a clicking sound.

To run a firmware from RAM and then go back to update mode:

pynxt fwexec systems/examples/sound/sound_samba.bin

To install it on the brick permanently:

pynxt fwflash systems/examples/sound/sound_rom.bin

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