The repository contains the Arduino APIs and IDE integration files targeting a generic mbed-enabled board

Clone the repository in $sketchbook/hardware/arduino

mkdir -p $sketchbook/hardware/arduino
cd $sketchbook/hardware/arduino
git clone [email protected]:arduino/ArduinoCore-nRF528x-mbedos mbed

Then clone https://github.com/arduino/ArduinoCore-API in a directory at your choice. Checkout namespace_arduino branch.

git clone [email protected]:arduino/ArduinoCore-API -b namespace_arduino

Remove the symlink to api you can find in $sketchbook/hardware/arduino/mbed/cores/arduino and replace it with a symlink to ArduinoCore-API/api

Open Arduino IDE; you should now see three new targets under MBED boards label

Adding a target is a mostly automatic procedure that involves running https://github.com/arduino/ArduinoCore-nRF528x-mbedos/blob/master/mbed-os-to-arduino after setting BOARDNAME and ARDUINOCORE env variables. Actions marked as TODO must be executed manually.

You can use this core as a standard mbed library; all APIs are under arduino namespace (so they must be called like arduino::digitalWrite() )

The opposite is working as well; from any sketch you can call mbed APIs by prepending mbed:: namespace.