pub fn channel_mux_verilog() -> StringExpand description
logos_channel_mux, several fast ports on the channels’ fast ports at once: each port’s descriptors and write lines
through registers of its own in the order it gives them, each channel’s descriptors taken from its ports in turn, each
read line and write’s done token given back to the port it is of, one port’s write lines on a channel at a time.