✨ MKS Eagle (STM32F407VET6) board (MarlinFirmware#22897)

Marlin/src/core/boards.h

@@ -402,6 +402,7 @@
 #define BOARD_TH3D_EZBOARD_LITE_V2    4232  // TH3D EZBoard Lite v2.0
 #define BOARD_INDEX_REV03             4233  // Index PnP Controller REV03 (STM32F407VET6/VGT6)
 #define BOARD_MKS_ROBIN_NANO_V1_3_F4  4234  // MKS Robin Nano V1.3 and MKS Robin Nano-S V1.3 (STM32F407VET6)
+#define BOARD_MKS_EAGLE               4235  // MKS Eagle (STM32F407VET6)
 
 //
 // ARM Cortex M7

Marlin/src/pins/pins.h

@@ -651,6 +651,8 @@
   #include "stm32f4/pins_INDEX_REV03.h"         // STM32F4                                env:Index_Mobo_Rev03
 #elif MB(MKS_ROBIN_NANO_V1_3_F4)
   #include "stm32f4/pins_MKS_ROBIN_NANO_V1_3_F4.h" // STM32F4                             env:mks_robin_nano_v1_3_f4
+#elif MB(MKS_EAGLE)
+  #include "stm32f4/pins_MKS_EAGLE.h"           // STM32F4                                env:mks_eagle
 
 //
 // ARM Cortex M7

Marlin/src/pins/stm32f4/pins_MKS_EAGLE.h

@@ -0,0 +1,35 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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
+
+#define ALLOW_STM32DUINO
+#include "env_validate.h"
+
+#if HOTENDS > 2 || E_STEPPERS > 2
+  #error "MKS Eagle supports up to 2 hotends / E-steppers."
+#elif HAS_FSMC_TFT
+  #error "MKS Eagle doesn't support FSMC-based TFT displays."
+#endif
+
+#define BOARD_INFO_NAME "MKS Eagle"
+
+#include "pins_MKS_ROBIN_NANO_V3_common.h"