From d1e0143c9dd6bb9c893d8fa4a185f3900d45463e Mon Sep 17 00:00:00 2001
From: Markus Koch <markus@notsyncing.net>
Date: Sun, 23 Jan 2022 16:02:31 +0100
Subject: [PATCH] phy: Fix TX manchester encoding

Ethernet uses "inverted" manchester as per IEEE 802.3.
---
 trashernet/trashernet_phy.vhd | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/trashernet/trashernet_phy.vhd b/trashernet/trashernet_phy.vhd
index 61a3ff4..9116f33 100644
--- a/trashernet/trashernet_phy.vhd
+++ b/trashernet/trashernet_phy.vhd
@@ -396,8 +396,8 @@ begin
 						tx_p <= '1';
 						tx_n <= '0';
 					when ACTIVE =>
-						tx_p <= sr(sr'low) xor bit_stage;
-						tx_n <= not (sr(sr'low) xor bit_stage);
+						tx_p <= sr(sr'low) xnor bit_stage;
+						tx_n <= not (sr(sr'low) xnor bit_stage);
 				end case;
 			end if;
 		end process driver;