i2c controlled motor driver

It would be quite useful to have an i2c controlled motor driver similar to the serial controlled motor drivers such as product ROB-09571.

I haven’t had the time to go through all the specsheets to see if the right pins are exposed from the atmega used on ROB-09571, but if the right pins are exposed, perhaps the ROB-09571 board could be controlled via i2c with an updated firmware. Does anyone know for sure?