Tronxy X5S pins and configuration

Marlin/src/core/boards.h

 #define BOARD_MELZI_CREALITY    89    // Melzi Creality3D board (for CR-10 etc)
 #define BOARD_MELZI_MALYAN      92    // Melzi Malyan M150 board
 #define BOARD_CREALITY_ENDER    601   // Creality Ender
+#define BOARD_MELZI_TRONXY      505   // Tronxy X5S
 #define BOARD_STB_11            64    // STB V1.1
 #define BOARD_AZTEEG_X1         65    // Azteeg X1
 

Marlin/src/pins/pins.h

   #include "pins_MELZI_MALYAN.h"      // ATmega644P, ATmega1284P
 #elif MB(CREALITY_ENDER)
   #include "pins_CREALITY_ENDER.h"    // ATmega1284P
+#elif MB(MELZI_TRONXY)
+  #include "pins_MELZI_TRONXY.h"      // ATmega644P, ATmega1284P
 #elif MB(STB_11)
   #include "pins_STB_11.h"            // ATmega644P, ATmega1284P
 #elif MB(AZTEEG_X1)
 #ifndef SDPOWER
   #define SDPOWER -1
 #endif
+#ifndef SDSS
+  #define SDSS -1
+#endif
 #ifndef LED_PIN
   #define LED_PIN -1
 #endif

Marlin/src/pins/pins_MELZI_TRONXY.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 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/>.
+ *
+ */
+
+/**
+ * Melzi pin assignments
+ */
+
+#define BOARD_NAME "Melzi (Tronxy)"
+#include "pins_MELZI.h"
+
+#undef Z_ENABLE_PIN
+#undef LCD_PINS_RS
+#undef LCD_PINS_ENABLE
+#undef LCD_PINS_D4
+#undef LCD_PINS_D5
+#undef LCD_PINS_D6
+#undef LCD_PINS_D7
+#undef BTN_EN1
+#undef BTN_EN2
+#undef BTN_ENC
+#undef LCD_SDSS
+
+#define Z_ENABLE_PIN    14
+#define LCD_PINS_RS     30
+#define LCD_PINS_ENABLE 28
+#define LCD_PINS_D4     16
+#define LCD_PINS_D5     17
+#define LCD_PINS_D6     27
+#define LCD_PINS_D7     29
+#define BTN_EN1         10
+#define BTN_EN2         11
+#define BTN_ENC         26
+
+#define ST7920_DELAY_1 DELAY_0_NOP
+#define ST7920_DELAY_2 DELAY_2_NOP
+#define ST7920_DELAY_3 DELAY_0_NOP