gistfile1.txt

#!/usr/bin/env python3

from glasgow.applet import *

from nmigen.compat import *
from nmigen.build.plat import ResourceError

import logging
import asyncio

"""
Based on: https://github.com/GlasgowEmbedded/glasgow/blob/b28a6d7d918091e7425cd3e26d0f346d30966195/software/glasgow/applet/internal/selftest/__init__.py
"""


class BlinkSubtarget(Module):
    def __init__(self, applet, target):
        try:
            leds = [target.platform.request("led", n) for n in range(5)]
        except ResourceError:
            leds = []

        reg_led, applet.addr_led = target.registers.add_rw(5)

        target.comb += [Cat(leds).eq(reg_led)]


class BlinkApplet(GlasgowApplet, name="blink"):
    logger = logging.getLogger(__name__)
    help = "Just a blinky. Also a test of out-of-tree applets"

    @classmethod
    def add_build_arguments(cls, parser, access):
        return super().add_build_arguments(parser, access)

    def build(self, target, args):
        target.submodules += BlinkSubtarget(applet=self, target=target)

    @classmethod
    def add_run_arguments(cls, parser, access):
        return super().add_run_arguments(parser, access)

    async def run(self, device, args):
        while (True):
            await asyncio.sleep(1)
            device.write_register(self.addr_led, 0b10101)

            await asyncio.sleep(0.5)
            device.write_register(self.addr_led, 0b01010)


# -------------------------------------------------------------------------------------------------

class BlinkAppletTestCase(GlasgowAppletTestCase, applet=BlinkApplet):

    @synthesis_test
    def test_build(self):
        self.assertBuilds()