From 95c1b7fb31b1f22d6d330fa8ce7432adf6c80d6d Mon Sep 17 00:00:00 2001
From: Keith Bennett <13375512+thisiskeithb@users.noreply.github.com>
Date: Sat, 13 Jul 2024 10:18:47 -0700
Subject: [PATCH] =?UTF-8?q?=F0=9F=94=A7=20USART6=20for=20STM32,=20expand?=
 =?UTF-8?q?=20port=20range=20(#27262)?=
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---
 Marlin/Configuration.h                | 8 ++++----
 Marlin/src/HAL/STM32/MarlinSerial.cpp | 3 +++
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 837716120d1e..fc0f73014c19 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -77,7 +77,7 @@
  * Serial port -1 is the USB emulated serial port, if available.
  * Note: The first serial port (-1 or 0) will always be used by the Arduino bootloader.
  *
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * :[-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
  */
 #define SERIAL_PORT 0
 
@@ -99,7 +99,7 @@
 /**
  * Select a secondary serial port on the board to use for communication with the host.
  * Currently Ethernet (-2) is only supported on Teensy 4.1 boards.
- * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * :[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
  */
 //#define SERIAL_PORT_2 -1
 //#define BAUDRATE_2 250000   // :[2400, 9600, 19200, 38400, 57600, 115200, 250000, 500000, 1000000] Enable to override BAUDRATE
@@ -107,14 +107,14 @@
 /**
  * Select a third serial port on the board to use for communication with the host.
  * Currently only supported for AVR, DUE, LPC1768/9 and STM32/STM32F1
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * :[-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
  */
 //#define SERIAL_PORT_3 1
 //#define BAUDRATE_3 250000   // :[2400, 9600, 19200, 38400, 57600, 115200, 250000, 500000, 1000000] Enable to override BAUDRATE
 
 /**
  * Select a serial port to communicate with RS485 protocol
- * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
+ * :[-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
  */
 //#define RS485_SERIAL_PORT 1
 #ifdef RS485_SERIAL_PORT
diff --git a/Marlin/src/HAL/STM32/MarlinSerial.cpp b/Marlin/src/HAL/STM32/MarlinSerial.cpp
index c4bc62994908..862678373fb1 100644
--- a/Marlin/src/HAL/STM32/MarlinSerial.cpp
+++ b/Marlin/src/HAL/STM32/MarlinSerial.cpp
@@ -37,6 +37,9 @@
 #ifndef USART5
   #define USART5 UART5
 #endif
+#ifndef USART6
+  #define USART6 UART6
+#endif
 #ifndef USART7
   #define USART7 UART7
 #endif