Initial commit.

re-bba/amaranth_boards/test/blinky.py

@@ -0,0 +1,48 @@
+import itertools
+
+from amaranth import *
+from amaranth.build import ResourceError
+
+
+__all__ = ["Blinky"]
+
+
+class Blinky(Elaboratable):
+    def elaborate(self, platform):
+        m = Module()
+
+        def get_all_resources(name):
+            resources = []
+            for number in itertools.count():
+                try:
+                    resources.append(platform.request(name, number))
+                except ResourceError:
+                    break
+            return resources
+
+        rgb_leds = [res for res in get_all_resources("rgb_led")]
+        leds     = [res.o for res in get_all_resources("led")]
+        leds.extend([led.r.o for led in rgb_leds])
+        leds.extend([led.g.o for led in rgb_leds])
+        leds.extend([led.b.o for led in rgb_leds])
+        buttons  = [res.i for res in get_all_resources("button")]
+        switches = [res.i for res in get_all_resources("switch")]
+
+        inverts  = [0 for _ in leds]
+        for index, button in zip(itertools.cycle(range(len(inverts))), buttons):
+            inverts[index] ^= button
+        for index, switch in zip(itertools.cycle(range(len(inverts))), switches):
+            inverts[index] ^= switch
+
+        clk_freq = platform.default_clk_frequency
+        timer = Signal(range(int(clk_freq//2)), reset=int(clk_freq//2) - 1)
+        flops = Signal(len(leds))
+
+        m.d.comb += Cat(leds).eq(flops ^ Cat(inverts))
+        with m.If(timer == 0):
+            m.d.sync += timer.eq(timer.reset)
+            m.d.sync += flops.eq(~flops)
+        with m.Else():
+            m.d.sync += timer.eq(timer - 1)
+
+        return m