Merge pull request #633 from uglyoldbob/nano

Add hdmi conector to tang nano 20k and connector pinout.

Author: enjoy-digital

litex_boards/platforms/sipeed_tang_nano_20k.py

@@ -47,6 +47,17 @@
         Subsignal("clk",  Pins("83")),
         IOStandard("LVCMOS33"),
     ),
+    
+    ("hdmi", 0,
+        Subsignal("clk_p", Pins("33")),
+        Subsignal("clk_n", Pins("34")),
+        Subsignal("data0_p", Pins("35")),
+        Subsignal("data0_n", Pins("36")),
+        Subsignal("data1_p", Pins("37")),
+        Subsignal("data1_n", Pins("38")),
+        Subsignal("data2_p", Pins("39")),
+        Subsignal("data2_n", Pins("40")),
+    ),
 
     # HDMI
     ("hdmi", 0,
@@ -96,7 +107,8 @@
 # Connectors ---------------------------------------------------------------------------------------
 
 _connectors = [
-        # TODO
+        ("J5", "- - - 76 80 42 41 56 54 51 48 55 49 86 79 - - 72 71 53 52"),
+        ("J6", "- 73 74 85 77 15 16 27 28 25 26 29 30 31 17 20 19 18 - -")
 ]
 
 # Platform -----------------------------------------------------------------------------------------