platforms/de0nano: swap serial tx/rx to ease use of cheap FT232 based cables.

diff --git a/litex/boards/platforms/de0nano.py b/litex/boards/platforms/de0nano.py
index 56cc5f164c33e53a09fbc3ee8f923b1782db872a..042a543e5c6551a93331322b9494ded00626580a 100644 (file)
--- a/litex/boards/platforms/de0nano.py
+++ b/litex/boards/platforms/de0nano.py
@@ -28,8 +28,10 @@ _io = [
     ("sw", 3, Pins("M15"), IOStandard("3.3-V LVTTL")),
 
     ("serial", 0,
-        Subsignal("tx", Pins("B4"), IOStandard("3.3-V LVTTL")), # gpio_05
-        Subsignal("rx", Pins("B5"), IOStandard("3.3-V LVTTL"))  # gpio_07
+        # Compatible with cheap FT232 based cables (ex: Gaoominy 6Pin Ftdi Ft232Rl Ft232)
+        # GND on JP1 Pin 12.
+        Subsignal("tx", Pins("B5"), IOStandard("3.3-V LVTTL")), # GPIO_07 (JP1 Pin 10)
+        Subsignal("rx", Pins("B4"), IOStandard("3.3-V LVTTL"))  # GPIO_05 (JP1 Pin 8)
     ),
 
     ("sdram_clock", 0, Pins("R4"), IOStandard("3.3-V LVTTL")),