MKS Robin 2 (STM32F407ZE) base support (#16270)

Marlin/src/core/boards.h

@@ -311,6 +311,7 @@
 #define BOARD_VAKE403D                4211  // VAkE 403D (STM32F446VET6)
 #define BOARD_FYSETC_S6               4212  // FYSETC S6 board
 #define BOARD_FLYF407ZG               4213  // FLYF407ZG board (STM32F407ZG)
+#define BOARD_MKS_ROBIN2              4214  // MKS_ROBIN2 (STM32F407ZE)
 
 //
 // ARM Cortex M7

Marlin/src/pins/pins.h

@@ -539,6 +539,8 @@
   #include "stm32/pins_FYSETC_S6.h"             // STM32F4                                env:FYSETC_S6
 #elif MB(FLYF407ZG)
   #include "stm32/pins_FLYF407ZG.h"             // STM32F4                                env:FLYF407ZG
+#elif MB(MKS_ROBIN2)
+  #include "pins_MKS_ROBIN2.h"                  // STM32F4                                env:MKS_ROBIN2
 
 //
 // ARM Cortex M7

Marlin/src/pins/stm32/pins_MKS_ROBIN2.h

@@ -0,0 +1,102 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#ifndef STM32F4
+  #error "Oops! Select an STM32F4 board in 'Tools > Board.'"
+#elif HOTENDS > 2 || E_STEPPERS > 2
+  #error "MKS_ROBIN2 supports up to 2 hotends / E-steppers."
+#endif
+
+#ifndef BOARD_INFO_NAME
+  #define BOARD_NAME "MKS_ROBIN2"
+#endif
+
+#ifndef DEFAULT_MACHINE_NAME
+  #define DEFAULT_MACHINE_NAME BOARD_INFO_NAME
+#endif
+
+#define SRAM_EEPROM_EMULATION
+
+//
+// Limit Switches
+//
+#define X_MIN_PIN          PG8
+#define X_MAX_PIN          PG7
+#define Y_MIN_PIN          PG6
+#define Y_MAX_PIN          PG5
+#define Z_MIN_PIN          PG4
+#define Z_MAX_PIN          PG3
+
+//
+// Servos
+//
+#define SERVO0_PIN         PB0   // XS2-5
+#define SERVO1_PIN         PF7   // XS1-5
+#define SERVO2_PIN         PF8   // XS1-6
+
+//
+// Steppers
+//
+#define X_STEP_PIN         PE6
+#define X_DIR_PIN          PE5
+#define X_ENABLE_PIN       PC13
+
+#define Y_STEP_PIN         PE3
+#define Y_DIR_PIN          PE2
+#define Y_ENABLE_PIN       PE4
+
+#define Z_STEP_PIN         PE0
+#define Z_DIR_PIN          PB9
+#define Z_ENABLE_PIN       PE1
+
+#define E0_STEP_PIN        PG10
+#define E0_DIR_PIN         PG9
+#define E0_ENABLE_PIN      PB8
+
+#define E1_STEP_PIN        PD3
+#define E1_DIR_PIN         PA15
+#define E1_ENABLE_PIN      PD6
+
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN         PC1   // T1 <-> E0
+#define TEMP_1_PIN         PC2   // T2 <-> E1
+#define TEMP_BED_PIN       PC0   // T0 <-> Bed
+
+//
+// Heaters / Fans
+//
+#define HEATER_0_PIN       PF3   // Heater0
+#define HEATER_1_PIN       PF2   // Heater1
+#define HEATER_BED_PIN     PF4   // Hotbed
+#define FAN_PIN            PA7   // Fan0
+
+//
+// Misc. Functions
+//
+#define SDSS               -1    // PB12
+
+#define SD_DETECT_PIN      PF9
+#define BEEPER_PIN         PG2