nmigen-IBUFDS-example

from nmigen import *
from nmigen.build import *
from nmigen.build.res import *
from nmigen.lib.io import Pin
from nmigen_boards.ml505 import ML505Platform

class IBUFDS(Elaboratable):
    def __init__(self):
        pass

    def elaborate(self, platform):
        m = Module()

        platform.add_resources([
            Resource("IBUFDS", 0,
                DiffPairs("48", "46", conn=("gpio", 1), dir="i"),
                Attrs(IOSTANDARD="LVDS_25", IBUF_LOW_PWR="FALSE")
            ),
            Resource("out", 0,
                Pins("24", conn=("gpio", 0), dir="o"),
                Attrs(IOSTANDARD="LVCMOS33")
            ),
        ])

        input_differential = platform.request("IBUFDS")
        out = platform.request("out")

        m.d.comb += [
            out.o.eq(input_differential.i)
        ]
        return m

if __name__ == "__main__":
    dut = IBUFDS()
    ML505Platform().build(dut, do_program=False)