Help setting up a Gridseed blade and raspeberry pi 3

I have raspbian setup on Raspberry Pi 3 and putty, CG miner downloaded, It will run but using CPU it seems.
cannot enable the gridseed blades??
I am a total noob and all is being pieced together with poor info from the net. cannot seem to get straight answers out there. Help from anyone to get started would be apreciated.