After Adam loads the ARM Cortex M3 on Digilent Arty A7 (see blog post "Running ARM Cortex M1 or M3 on Xilinx FPGA"), he uses the Arty A7 and Pmod HB3 H-bridge module to control two Brushless DC Motors and drive the motor in both forward and reverse direction. Here is the project summary. The step-by-step guideline is available at Digilent project page.
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/blog/show/build-an-arm-cortex-m3-robot