ecp5: Adding BRAM initialisation and config

Signed-off-by: David Shah <dave@ds0.me>

1 files changed, 22 insertions, 0 deletions

diff --git a/techlibs/ecp5/brams_init.py b/techlibs/ecp5/brams_init.py
new file mode 100755
index 000000000..6f650b2a9
--- /dev/null
+++ b/techlibs/ecp5/brams_init.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+with open("techlibs/ecp5/bram_init_1_2_4.vh", "w") as f:
+    for i in range(0, 0x40):
+        init_snippets = []
+        for j in range(32):
+            init_snippets.append("INIT[%4d*8 +: 8]" % (32 * i + j))
+            init_snippets.append("3'b000" if (j % 2 == 1) else "1'b0")
+        init_snippets = list(reversed(init_snippets))
+        for k in range(8, 64, 8):
+            init_snippets[k] = "\n          " + init_snippets[k]
+        print(".INIT_%02X({%s})," % (i, ", ".join(init_snippets)), file=f)
+
+with open("techlibs/ecp5/bram_init_9_18_36.vh", "w") as f:
+    for i in range(0, 0x40):
+        init_snippets = []
+        for j in range(16):
+            init_snippets.append("INIT[%3d*18 +: 18]" % (16 * i + j))
+            init_snippets.append("2'b00")
+        init_snippets = list(reversed(init_snippets))
+        for k in range(8, 32, 8):
+            init_snippets[k] = "\n          " + init_snippets[k]
+        print(".INIT_%02X({%s})," % (i, ", ".join(init_snippets)), file=f)