Add Alchitry CuV2 boardHEADmain

Once flashed, the J11 LED alternate blinks with all the other LEDs. If
you hold the button, all LEDs blink in unison. The board definition is
otherwise incomplete.

The iceprog '-u' flag is available in my icestorm fork. This needs a
bunch of environment variables to build and run. Make sure you have all
the other Amaranth things installed.

Here's a very manual way to set the env vars, just in case you haven't
put anything on your path.

  YOSYS=yowasp-yosys \
    NEXTPNR_ICE40=yowasp-nextpnr-ice40 \
    ICEPACK=path/to/your/icepack \
    ICEPROG=path/to/your/iceprog \
    python3 -m amaranth_boards.alchitry_cuv2

1 files changed, 50 insertions, 0 deletions

diff --git a/amaranth_boards/alchitry_cuv2.py b/amaranth_boards/alchitry_cuv2.py
new file mode 100644
index 0000000..e6bb7ce
--- /dev/null
+++ b/amaranth_boards/alchitry_cuv2.py
@@ -0,0 +1,50 @@
+import os
+import subprocess
+
+from amaranth import *
+from amaranth.build import *
+from amaranth.vendor import LatticeICE40Platform
+from .resources import *
+
+
+class AlchitryCuV2Platform(LatticeICE40Platform):
+    device      = "iCE40HX8K"
+    package     = "CB132"
+    speed       = "1"
+    default_clk = "clk100"
+    resources   = [
+        Resource(
+            "clk100", 0, Pins("P7", dir="i"), Clock(100e6), Attrs(GLOBAL=True,
+            IO_STANDARD="SB_LVCMOS")
+        ),
+
+        Resource("usb", 0,
+            Subsignal("usb_tx", Pins("P14", dir="o")),
+            Subsignal("usb_rx", Pins("M9", dir="i")),
+            Attrs(IO_STANDARD="LVCMOS")
+        ),
+
+        *SPIFlashResources(0,
+            cs_n="P13", clk="P12", copi="M11", cipo="P11",
+            attrs=Attrs(IO_STANDARD="SB_LVCMOS")
+        ),
+
+        *LEDResources(
+            pins="J11 K11 G12 H12 K14 J12 L14 K12", attrs=Attrs(IO_STANDARD="SB_LVCMOS")
+        ),
+
+        *ButtonResources(pins="P8"),
+    ]
+    connectors  = [
+        # TODO(mciantyre) define these.
+    ]
+
+    def toolchain_program(self, products, name):
+        iceprog = os.environ.get("ICEPROG", "iceprog")
+        with products.extract("{}.bin".format(name)) as bitstream_filename:
+            subprocess.check_call([iceprog, "-u", "-b", bitstream_filename])
+
+
+if __name__ == "__main__":
+    from .test.blinky import Blinky
+    AlchitryCuV2Platform().build(Blinky(), do_program=True)