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stmos

stmos is an operating system for STM microprocessors. It aims to support (or be able to support) all STM Cortex-M processors.

Features:

Unprivileged code execution
ELF loading and execution (loads an init from the initrd)
Near-full C standard library support for loaded ELFs
libgpio: GPIO access for loaded ELFs

Currently supported processors:

STM32L476RG (board: NUCLEO-L476RG)

building

To build stmos, you'll need the following programs:

The arm-stmos toolchain (see the arm-stmos folder)
openocd
gdb (with multiarch support)

To compile stmos simply run make (-j option supported). To upload, use run.sh to start openocd/gdb; do lo to load stmos, and c to run it.