Malyan M300 support (#17421)

Marlin/src/pins/stm32f0/pins_MALYAN_M300.h

@@ -0,0 +1,88 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 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
+
+#if NONE(__STM32F1__, STM32F1xx, STM32F0xx)
+  #error "Oops! Select a 'Malyan M300' board in 'Tools > Board.'"
+#endif
+
+#define BOARD_INFO_NAME "Malyan M300"
+
+//
+// EEPROM Emulation
+//
+#define FLASH_EEPROM_EMULATION
+
+//
+// SD CARD SPI
+//
+#define SDSS                              SS_PIN
+
+//
+// Timers
+//
+#undef STEP_TIMER
+#undef TEMP_TIMER
+#define STEP_TIMER 6
+#define TEMP_TIMER 7
+
+//
+// Limit Switches
+//
+#define X_MAX_PIN                           PC13
+#define Y_MAX_PIN                           PC14
+#define Z_MAX_PIN                           PC15
+#define Z_MIN_PIN                           PB7
+
+//
+// Steppers
+//
+#define X_STEP_PIN                          PB14
+#define X_DIR_PIN                           PB13
+#define X_ENABLE_PIN                        PB10
+
+#define Y_STEP_PIN                          PB12
+#define Y_DIR_PIN                           PB11
+#define Y_ENABLE_PIN                        PB10
+
+#define Z_STEP_PIN                          PB2
+#define Z_DIR_PIN                           PB1
+#define Z_ENABLE_PIN                        PB10
+
+#define E0_STEP_PIN                         PA7
+#define E0_DIR_PIN                          PA6
+#define E0_ENABLE_PIN                       PB0
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN                          PA0   // Analog Input (HOTEND0 thermistor)
+#define TEMP_BED_PIN                        PA4   // Analog Input (BED thermistor)
+
+//
+// Heaters / Fans
+//
+#define HEATER_0_PIN                        PA1   // HOTEND0 MOSFET
+#define HEATER_BED_PIN                      PA5   // BED MOSFET
+
+#define AUTO_FAN_PIN                        PA8