ice40: Importer for placed ice40 designs from arachne

Signed-off-by: David Shah <davey1576@gmail.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/ice40/transform_arachne_loc.py b/ice40/transform_arachne_loc.py
new file mode 100755
index 00000000..14792845
--- /dev/null
+++ b/ice40/transform_arachne_loc.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+import json
+import sys
+import re
+
+with open(sys.argv[1]) as f:
+    data = json.load(f)
+    
+for mod, moddata in data["modules"].items():
+    if "cells" in moddata:
+        for cell, celldata in moddata["cells"].items():
+            pos = re.split('[,/]', celldata["attributes"]["loc"])
+            pos = [int(_) for _ in pos]
+            if celldata["type"] == "ICESTORM_LC":
+                celldata["attributes"]["BEL"] = "X%d/Y%d/lc%d" % (pos[0], pos[1], pos[2])
+            elif celldata["type"] == "SB_IO":
+                celldata["attributes"]["BEL"] = "X%d/Y%d/io%d" % (pos[0], pos[1], pos[2])
+            elif "RAM" in celldata["type"]:
+                celldata["attributes"]["BEL"] = "X%d/Y%d/ram" % (pos[0], pos[1])
+            elif celldata["type"] == "SB_GB":
+                celldata["attributes"]["BEL"] = "X%d/Y%d/gb" % (pos[0], pos[1])
+            else:
+                assert False
+print(json.dumps(data, sort_keys=True, indent=4))
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