Add module to the DE0 nano basic computer

hello peolpe, I´m an ecuadorian student and i am doing a proyect, it is a SPI analizer with the DE0 Nano, i dont know how to receive the 3 typical signals of this protocol, can you help me with these please, my idea is to use the DE0 nano basic computer of the university program and add a module that lets me to receive these signaals, thanks you for your attention.