Sample Code for the dfrduino running a bipolar stepper motor

I have spent quite a while searching for some sample code for the dfrduino motor drive when running a bipolar stepper motor. I need this code to better understand how I am going to solve the programming task ahead of me. I was wondering whether anyone could supply me with some sample code?

the dfrduino motor drive

Link?

http://www.droboticsonline.com/index.php/dri0001.html

There's no mention of the shield supporting stepper motors.