Started building support for the I²C (TWI) interface that will be used to control the DDS Controller. And started testing sending commands to the controller. Need to add commands to adjust DDS step size and hence frequency, start/stop output, load wave tables. Later I want to add support for specifying custom wave tables.

All my testing is being done with the infinitely useful Bus Pirate, my controller is responding to a Bus Pirate address space search so it is looking like things are starting to work!

Code of course is in Github.