From 08f52d64f54a631b1247c4475176ee9e900f0a67 Mon Sep 17 00:00:00 2001
From: Joaquin Rodriguez <jrhuerta@gmail.com>
Date: Thu, 29 Jan 2026 22:21:38 -0500
Subject: [PATCH] Add conditional definition for SW_SERIAL_UART

Define SW_SERIAL_UART if not already defined.
Avoid warnings when configuring ramps board to use Serial3 for TMC2209 drivers in UART mode in Configuration_local.hpp
---
 boards/RAMPS/pins_RAMPS.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/boards/RAMPS/pins_RAMPS.hpp b/boards/RAMPS/pins_RAMPS.hpp
index 86bf33c7..a7ff24ac 100644
--- a/boards/RAMPS/pins_RAMPS.hpp
+++ b/boards/RAMPS/pins_RAMPS.hpp
@@ -51,7 +51,9 @@
     #define DEC_DRIVER_ADDRESS 0b00
 #endif
 
-#define SW_SERIAL_UART 1
+#ifndef SW_SERIAL_UART
+    #define SW_SERIAL_UART 1
+#endif
 
 // DRIVER_TYPE_TMC2209_UART requires 4 digital pins in Arduino pin numbering
 #ifndef AZ_STEP_PIN