yangyi625/os-cortex-m4

A small operating system on arm cortex m4 cpu.

Introduction

A small operating system on STM32F429 Discovery. Still in early development.

Build Instructions

• OpenOCD

    git clone git://git.code.sf.net/p/openocd/code openocd
    cd openocd
    ./bootstrap
    ./configure --prefix=/usr/local \
        --enable-stlink
    echo -e "all:\ninstall:" > doc/Makefile
    make
    sudo make install

• GNU Tools for ARM Embedded Processors

    apt-get install gcc-arm-none-eabi

If you encounter the problems of missing packages, try to execute the following commands in advance:

    sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded
    sudo apt-get update

In addition, you need to download STM32F429I-Discovery firmware and extract it to the toplevel directory where stm32f429-r3d exists.

    unzip stsw-stm32138.zip

Then, get the latest source from GitHub and then build:

    git clone https://github.com/jserv/stm32f429-r3d
    cd project
    make

Please confirm STM32F429 Discovery is properly connected to USB, and let's flash the device:

    make flash

Be patient when OpenOCD is flashing.

Debug

    make debug
    arm-none-eabi-gdb --eval-command="target remote :3333" project.elf

Note on VSCode

If use VS Code for development, complete environment has been prepared for you. You might need to change some settings in c_cpp_properties.json