1. Obtain NuttX source code

Create a directory for the source code, here it is assumed that the nuttx-git folder is on your home directory ~/

mkdir ~/nuttx-git && cd ~/nuttx-git

Clone the source code from git repo

git clone https://bitbucket.org/nuttx/nuttx.git nuttx
git clone https://bitbucket.org/nuttx/apps.git apps
git clone https://bitbucket.org/nuttx/tools.git tools

2. Prepare kconfig-frontends

cd ~/nuttx-git/tools/kconfig-frontends

./configure

make

sudo make install
sudo ldconfig

Go to nuttx directory and get ready for next step

cd ~/nuttx-git/nuttx

3. Configuration

cd ~/nuttx-git/nuttx/tools

(Note that this tools directory is within nuttx folder, which is different from earlier tools directory! Wrong directory and there won't be any configuration file for you later :D )

• If using microUSB to USB cable

./configure.sh stm32f4discovery/usbnsh

• If using UART-TTL to USB cable

./configure.sh stm32f4discovery/nsh

cd ~/nuttx-git/nuttx

make menuconfig

At this point, you should see a GUI for Nuttx Configuration, using your cursor:

• Choose Build Setup --->
  • Choose Build Host Platform (...) --->
    • Select (X)Linux
    • Exit
  • Exit
• Choose System Type --->
  • Choose Toolchain Selection (...) --->
    • Select (X) Generic GNU EABI toolchain under Linux
    • Exit
  • Exit
• Exit & Save

4. Installation

cd ~/nuttx-git/nuttx/

make

You should now be able to see two files name nuttx and nuttx.bin your nuttx directory.

Congratulation, you have just succesfully built the nuttx for STM32F4 Discovery board. Similar steps could also be done for other supported ARM-based boards.

5. Reference

This section is adapted from here. The original article was intended for STM32F4 Discovery, which is running on ARM Cortex M4.