Jacob wrote: >> Cortex M4 CPU > > replace the Xilinx with Altera .. ? I'll see what I can implement in a Lattice iCE40 with the open source toolchain that was published yesterday. http://www.clifford.at/icestorm/ https://youtu.be/yUiNlmvVOq8 https://github.com/cliffordwolf/yosys https://github.com/cseed/arachne-pnr //Peter