from humpback import HumpbackPlatform from migen.fhdl.module import Module class UrukulConnector(Module): def __init__(self, platform): # Request EEM I/O & SPI eem = platform.request("eem", 1) spi = platform.request("spi") # Assert signal length assert len(eem.p) == 8 assert len(eem.n) == 8 assert len(spi.sclk) == 1 assert len(spi.mosi) == 1 assert len(spi.miso) == 1 assert len(spi.cs) == 3 # Flip positive signal as negative output self.comb += eem.n.eq(~eem.p) # Link EEM to SPI self.comb += [ eem.p[0].eq(spi.sclk), eem.p[1].eq(spi.mosi), spi.miso.eq(eem.p[2]), eem.p[3].eq(spi.cs[0]), eem.p[4].eq(spi.cs[1]), eem.p[5].eq(spi.cs[2]), ] # Debug purposes: Tie EEM MISO to EEM MOSI # self.comb += eem.p[2].eq(eem.n[1]) if __name__ == "__main__": platform = HumpbackPlatform() platform.build(UrukulConnector(platform))