From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Sat, 18 Apr 2020 09:38:24 +0000 (+0200)
Subject: platforms/de0nano: swap serial tx/rx to ease use of cheap FT232 based cables.
X-Git-Tag: 24jan2021_ls180~449
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=56e1528455464572226ddd99663b17559eca4bc0;p=litex.git

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 56cc5f16..042a543e 100644
--- 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")),