ecp5: Script for BRAM IO connections

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

1 files changed, 46 insertions, 0 deletions

diff --git a/techlibs/ecp5/brams_connect.py b/techlibs/ecp5/brams_connect.py
new file mode 100755
index 000000000..f86dcfcf0
--- /dev/null
+++ b/techlibs/ecp5/brams_connect.py
@@ -0,0 +1,46 @@
+#!/usr/bin/env python3
+
+def write_bus_ports(f, ada_bits, adb_bits, dia_bits, dob_bits):
+    ada_conn = [".ADA%d(%s)" % (i, ada_bits[i]) for i in range(len(ada_bits))]
+    adb_conn = [".ADB%d(%s)" % (i, adb_bits[i]) for i in range(len(adb_bits))]
+    dia_conn = [".DIA%d(%s)" % (i, dia_bits[i]) for i in range(len(dia_bits))]
+    dob_conn = [".DOB%d(%s)" % (i, dob_bits[i]) for i in range(len(dob_bits))]
+    print("    %s," % ", ".join(ada_conn), file=f)
+    print("    %s," % ", ".join(adb_conn), file=f)
+    print("    %s," % ", ".join(dia_conn), file=f)
+    print("    %s," % ", ".join(dob_conn), file=f)
+
+with open("techlibs/ecp5/bram_conn_1.vh", "w") as f:
+    ada_bits = ["A1ADDR[%d]" % i for i in range(14)]
+    adb_bits = ["B1ADDR[%d]" % i for i in range(14)]
+    dia_bits = ["A1DATA[0]"] + ["1'b0" for i in range(17)]
+    dob_bits = ["B1DATA[0]"]
+    write_bus_ports(f, ada_bits, adb_bits, dia_bits, dob_bits)
+
+with open("techlibs/ecp5/bram_conn_2.vh", "w") as f:
+    ada_bits = ["1'b0"] + ["A1ADDR[%d]" % i for i in range(13)]
+    adb_bits = ["1'b0"] + ["B1ADDR[%d]" % i for i in range(13)]
+    dia_bits = ["A1DATA[%d]" % i for i in range(2)] + ["1'b0" for i in range(16)]
+    dob_bits = ["B1DATA[%d]" % i for i in range(2)]
+    write_bus_ports(f, ada_bits, adb_bits, dia_bits, dob_bits)
+
+with open("techlibs/ecp5/bram_conn_4.vh", "w") as f:
+    ada_bits = ["1'b0", "1'b0"] + ["A1ADDR[%d]" % i for i in range(12)]
+    adb_bits = ["1'b0", "1'b0"] + ["B1ADDR[%d]" % i for i in range(12)]
+    dia_bits = ["A1DATA[%d]" % i for i in range(4)] + ["1'b0" for i in range(14)]
+    dob_bits = ["B1DATA[%d]" % i for i in range(4)]
+    write_bus_ports(f, ada_bits, adb_bits, dia_bits, dob_bits)
+
+with open("techlibs/ecp5/bram_conn_9.vh", "w") as f:
+    ada_bits = ["1'b0", "1'b0", "1'b0"] + ["A1ADDR[%d]" % i for i in range(11)]
+    adb_bits = ["1'b0", "1'b0", "1'b0"] + ["B1ADDR[%d]" % i for i in range(11)]
+    dia_bits = ["A1DATA[%d]" % i for i in range(9)] + ["1'b0" for i in range(9)]
+    dob_bits = ["B1DATA[%d]" % i for i in range(9)]
+    write_bus_ports(f, ada_bits, adb_bits, dia_bits, dob_bits)
+
+with open("techlibs/ecp5/bram_conn_18.vh", "w") as f:
+    ada_bits = ["A1EN[0]", "A1EN[1]", "1'b0", "1'b0"] + ["A1ADDR[%d]" % i for i in range(10)]
+    adb_bits = ["1'b0", "1'b0", "1'b0", "1'b0"] + ["B1ADDR[%d]" % i for i in range(10)]
+    dia_bits = ["A1DATA[%d]" % i for i in range(18)]
+    dob_bits = ["B1DATA[%d]" % i for i in range(18)]
+    write_bus_ports(f, ada_bits, adb_bits, dia_bits, dob_bits)