Interesting SPI Routing with iCE40 FPGAs

A few weeks ago I posted about how much fun I was having with the Fomu FPGA development board while travelling. This project from Tim &lsquo;mithro&rsquo; Ansell and Sean &lsquo;xobs&rsquo; Cross is not new, but remains a favorite of mine because of how portable it is — the entire board can fit in your USB port! The Fomu includes a Lattice Semiconductor iCE40 UltraPlus 5K, which has been a popular…