add hub75 port mapping

groovylight/hub75.py

@@ -0,0 +1,26 @@
+
+
+# r0 g0 b0 gnd r1 g1 b1 e a b c d clk stb oe gnd
+from litex.build.generic_platform import Signal, Subsignal, Pins
+from litex.build.io import Module
+
+def make_hub75_iodevice(index, basename):
+    b = basename
+    signals = ("hub75_iodev", index,
+               Subsignal("r0", Pins(f"{b}:1")),
+               Subsignal("g0", Pins(f"{b}:2")),
+               Subsignal("b0", Pins(f"{b}:3")),
+               Subsignal("r1", Pins(f"{b}:5")),
+               Subsignal("g1", Pins(f"{b}:6")),
+               Subsignal("b1", Pins(f"{b}:7")),
+               Subsignal("addr", Pins(f"{b}:9 {b}:10 {b}:11 {b}:12 {b}:8")),
+               Subsignal("clk", Pins(f"{b}:13")),
+               Subsignal("stb", Pins(f"{b}:14")),
+               Subsignal("oe", Pins(f"{b}:15")),
+            )
+    return [signals]
+
+
+class Hub75Driver(Module):
+    count = Signal(8) # fsm counter
+