Force use of included yowasp-yosys tools

Author: robtaylor

mcu_soc/design/steps/__init__.py

@@ -0,0 +1,22 @@
+import os
+
+def _setup_amaranth():
+    _amaranth_settings = {
+        "AMARANTH_USE_YOSYS": "system",
+        "YOSYS": "yowasp-yosys",
+        "SBY": "yowasp-sby",
+        "SMTBMC": "yowasp-yosys-smtbmc",
+        "NEXTPNR_ICE40": "yowasp-nextpnr-ice40",
+        "ICEPACK": "yowasp-icepackr",
+        "NEXTPNR_ECP5": "yowasp-nextpnr-ecp5",
+        "ECPBRAM": "yowasp-ecpbram",
+        "ECPMULTI": "yowasp-ecpmulti",
+        "ECPPACK": "yowasp-ecppack",
+        "ECPPLL": "yowasp-ecppll",
+        "ECPUNPACK": "yowasp-ecpunpack",
+        "NEXTPNR-ECP5": "yowasp-nextpnr-ecp5",
+        "SBY": "yowasp-sby",
+        "YOSYS-WITNESS": "yowasp-yosys-witness",
+    }
+
+    os.environ |= _amaranth_settings

mcu_soc/design/steps/board.py

@@ -9,6 +9,7 @@
 from amaranth.build import Resource, Subsignal, Pins, Attrs
 
 from ..design import MySoC
+from . import _setup_amaranth
 
 class BoardSocWrapper(wiring.Component):
     def __init__(self):
@@ -68,7 +69,7 @@ def elaborate(self, platform):
 
 class MyBoardStep(BoardStep):
     def __init__(self, config):
-
+        _setup_amaranth()
         platform = ULX3S_85F_Platform()
 
         super().__init__(config, platform)