The Papilio Platform was designed from the ground up to make it easy to add hardware to your FPGA circuits using what we call Wings. The name Papilio means Latin for Butterfly, so it is fitting that you extend your Butterfly by adding Wings to it. Wings are like mini-Arduino shields that let you add peripherals Ala-Carte as you need them without wasting pins. They also ease the FPGA design process by removing the need to figure out what wires connect where. Just snap a Wing into a Wing slot and all of the FPGA circuits and C++ code we provide will let you pass a Wing slot instead of all of the wires needed for that Wing. It's a huge time saver!