Drop compatibility with Amaranth 0.4.

Author: jfng

.github/workflows/main.yml

@@ -21,14 +21,13 @@ jobs:
         - 'pypy-3.10'
         # this version range needs to be synchronized with the one in pyproject.toml
         amaranth-version:
-        - '0.4'
         - '0.5'
         - 'git'
         allow-failure:
         - true
         - false
         exclude: # all of these are inverted (this is unfortunately the best way to do this)
-        - amaranth-version: '0.4'
+        - amaranth-version: '0.5'
           allow-failure: false
         - amaranth-version: 'git'
           allow-failure: true

amaranth_boards/test/blinky.py

@@ -2,6 +2,7 @@
 
 from amaranth import *
 from amaranth.build import ResourceError
+from amaranth.lib import io
 
 
 __all__ = ["Blinky"]
@@ -15,32 +16,34 @@ def get_all_resources(name):
             resources = []
             for number in itertools.count():
                 try:
-                    resources.append(platform.request(name, number))
+                    resources.append(platform.request(name, number, dir="-"))
                 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")]
+        leds     = [io.Buffer("o", res) for res in get_all_resources("led")]
+        leds.extend([io.Buffer("o", led.r) for led in rgb_leds])
+        leds.extend([io.Buffer("o", led.g) for led in rgb_leds])
+        leds.extend([io.Buffer("o", led.b) for led in rgb_leds])
+        buttons  = [io.Buffer("i", res) for res in get_all_resources("button")]
+        switches = [io.Buffer("i", res) for res in get_all_resources("switch")]
+
+        m.submodules += leds + buttons + switches
 
         inverts  = [0 for _ in leds]
         for index, button in zip(itertools.cycle(range(len(inverts))), buttons):
-            inverts[index] ^= button
+            inverts[index] ^= button.i
         for index, switch in zip(itertools.cycle(range(len(inverts))), switches):
-            inverts[index] ^= switch
+            inverts[index] ^= switch.i
 
         clk_freq = platform.default_clk_frequency
-        timer = Signal(range(int(clk_freq//2)), reset=int(clk_freq//2) - 1)
+        timer = Signal(range(int(clk_freq//2)), init=int(clk_freq//2) - 1)
         flops = Signal(len(leds))
 
-        m.d.comb += Cat(leds).eq(flops ^ Cat(inverts))
+        m.d.comb += Cat(led.o for led in leds).eq(flops ^ Cat(inverts))
         with m.If(timer == 0):
-            m.d.sync += timer.eq(timer.reset)
+            m.d.sync += timer.eq(timer.init)
             m.d.sync += flops.eq(~flops)
         with m.Else():
             m.d.sync += timer.eq(timer - 1)

pyproject.toml

@@ -14,7 +14,7 @@ license = {file = "LICENSE.txt"}
 requires-python = "~=3.9"
 dependencies = [
   # this version requirement needs to be synchronized with the one in .github/workflows/main.yml
-  "amaranth>=0.4,<0.7",
+  "amaranth>=0.5,<0.7",
 ]
 
 [project.urls]