01_blinky.py

# If the design does not create a "sync" clock domain, it is created by the nMigen build system
# using the platform default clock (and default reset, if any).

from nmigen import *
from nmigen_boards.de10_nano import *


class Blinky(Elaboratable):
    def elaborate(self, platform):
        leds = Array(platform.request("led", i) for i in range(0,8))
        timer = Signal(28)

        m = Module()
        m.d.sync += timer.eq(timer + 1)
        for i in range(0,8):
            m.d.comb += leds[i].eq(timer[20+i])
        return m


if __name__ == "__main__":
    platform = DE10NanoPlatform()
    platform.build(Blinky(), do_program=True)