🔨 Creality V4.2.7 (GD32) (#27796)

Marlin/src/HAL/GD32_MFL/timers.cpp

@@ -92,7 +92,9 @@ bool is_temp_timer_initialized = false;
 
 // Retrieves the clock frequency of the stepper timer
 uint32_t GetStepperTimerClkFreq() {
-  return Step_Timer.getTimerClockFrequency();
+  // Cache result
+  static uint32_t clkFreq = Step_Timer.getTimerClockFrequency();
+  return clkFreq;
 }
 
 /**
@@ -191,10 +193,12 @@ void SetTimerInterruptPriorities() {
 // Detect timer conflicts
 // ------------------------
 
+TERN_(HAS_TMC_SW_SERIAL, static constexpr timer::TIMER_Base timer_serial[] = {static_cast<timer::TIMER_Base>(TIMER_SERIAL)});
 TERN_(SPEAKER, static constexpr timer::TIMER_Base timer_tone[] = {static_cast<timer::TIMER_Base>(TIMER_TONE)});
 TERN_(HAS_SERVOS, static constexpr timer::TIMER_Base timer_servo[] = {static_cast<timer::TIMER_Base>(TIMER_SERVO)});
 
 enum TimerPurpose {
+  PURPOSE_SERIAL,
   PURPOSE_TONE,
   PURPOSE_SERVO,
   PURPOSE_STEP,
@@ -205,6 +209,9 @@ enum TimerPurpose {
 // Includes the timer purpose to ease debugging when evaluating at build-time
 // This cannot yet account for timers used for PWM output, such as for fans
 static constexpr struct { TimerPurpose p; int t; } timers_in_use[] = {
+  #if HAS_TMC_SW_SERIAL
+    { PURPOSE_SERIAL, timer_base_to_index(timer_serial[0]) }, // Set in variant.h
+  #endif
   #if ENABLED(SPEAKER)
     { PURPOSE_TONE, timer_base_to_index(timer_tone[0]) },     // Set in variant.h
   #endif

Marlin/src/core/boards.h

@@ -386,7 +386,7 @@
 #define BOARD_CREALITY_V422           5039  // Creality v4.2.2 (STM32F103RC / STM32F103RE) ... GD32 Variant Below!
 #define BOARD_CREALITY_V423           5040  // Creality v4.2.3 (STM32F103RC / STM32F103RE)
 #define BOARD_CREALITY_V425           5041  // Creality v4.2.5 (STM32F103RC / STM32F103RE)
-#define BOARD_CREALITY_V427           5042  // Creality v4.2.7 (STM32F103RC / STM32F103RE)
+#define BOARD_CREALITY_V427           5042  // Creality v4.2.7 (STM32F103RC / STM32F103RE) ... GD32 Variant Below!
 #define BOARD_CREALITY_V4210          5043  // Creality v4.2.10 (STM32F103RC / STM32F103RE) as found in the CR-30
 #define BOARD_CREALITY_V431           5044  // Creality v4.3.1 (STM32F103RC / STM32F103RE)
 #define BOARD_CREALITY_V431_A         5045  // Creality v4.3.1a (STM32F103RC / STM32F103RE)
@@ -563,6 +563,7 @@
 //
 
 #define BOARD_CREALITY_V422_GD32_MFL  7400  // Creality V4.2.2 MFL (GD32F303RE) ... STM32 Variant Above!
+#define BOARD_CREALITY_V427_GD32_MFL  7401  // Creality V4.2.7 MFL (GD32F303RE) ... STM32 Variant Above!
 
 //
 // Raspberry Pi

Marlin/src/pins/gd32f3/pins_CREALITY_V422_GD32_MFL.h

@@ -27,11 +27,7 @@
 
 #define ALLOW_GD32F3
 
-#ifndef BOARD_INFO_NAME
-  #define BOARD_INFO_NAME      "Creality V4.2.2 MFL"
-#endif
-#ifndef DEFAULT_MACHINE_NAME
-  #define DEFAULT_MACHINE_NAME "Ender-3 MFL"
-#endif
+#define BOARD_INFO_NAME      "Creality V4.2.2 MFL"
+#define DEFAULT_MACHINE_NAME "Ender-3 MFL"
 
 #include "../stm32f1/pins_CREALITY_V4.h"

Marlin/src/pins/gd32f3/pins_CREALITY_V427_GD32_MFL.h

@@ -0,0 +1,48 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2025 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * Creality MFL GD32 V4.2.7 (GD32F303RE) board pin assignments
+ */
+
+#define ALLOW_GD32F3
+
+#define BOARD_INFO_NAME      "Creality V4.2.7 MFL"
+#define DEFAULT_MACHINE_NAME "Creality3D MFL"
+
+//
+// Steppers
+//
+#define X_STEP_PIN                          PB9
+#define X_DIR_PIN                           PC2
+
+#define Y_STEP_PIN                          PB7
+#define Y_DIR_PIN                           PB8
+
+#define Z_STEP_PIN                          PB5
+#define Z_DIR_PIN                           PB6
+
+#define E0_STEP_PIN                         PB3
+#define E0_DIR_PIN                          PB4
+
+#include "../stm32f1/pins_CREALITY_V4.h"

Marlin/src/pins/pins.h

@@ -977,6 +977,8 @@
 
 #elif MB(CREALITY_V422_GD32_MFL)
   #include "gd32f3/pins_CREALITY_V422_GD32_MFL.h"   // GD32F303RE                           env:GD32F303RE_creality_mfl
+#elif MB(CREALITY_V427_GD32_MFL)
+  #include "gd32f3/pins_CREALITY_V427_GD32_MFL.h"   // GD32F303RE                           env:GD32F303RE_creality_mfl
 
 //
 // Raspberry Pi RP2040