Have you tried just using the instructions for flashing other boards - specifically the ones for the Olimexino/Leaflabs Maple?
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Have you tried just using the instructions for flashing other boards - specifically the ones for the Olimexino/Leaflabs Maple?