turn on second serial line from settings menu

Firmware/Configuration.h

@@ -81,6 +81,7 @@
 #define EEPROM_POWER_COUNT       (EEPROM_UVLO_MESH_BED_LEVELING-17)
 #define EEPROM_DIR_DEPTH        (EEPROM_POWER_COUNT-1)
 #define EEPROM_DIRS  (EEPROM_DIR_DEPTH-80) //8 chars for each dir name, max 10 levels
+#define EEPROM_SECOND_SERIAL_ACTIVE (EEPROM_DIRS - 1) //0: use only USART0; 1: use both USART0 and USART1
 
 //TMC2130 configuration
 #define EEPROM_TMC_AXIS_SIZE  //axis configuration block size

Firmware/Marlin_main.cpp

@@ -813,13 +813,14 @@ void setup()
 	EEPROM_read_B(EEPROM_FARM_NUMBER, &farm_no);
 	if ((farm_mode == 0xFF && farm_no == 0) || (farm_no == 0xFFFF)) farm_mode = false; //if farm_mode has not been stored to eeprom yet and farm number is set to zero or EEPROM is fresh, deactivate farm mode
 	if (farm_no == 0xFFFF) farm_no = 0;
+	
+	selectedSerialPort = eeprom_read_byte((uint8_t*)EEPROM_SECOND_SERIAL_ACTIVE);
+	if (selectedSerialPort == 0xFF) selectedSerialPort = 0;
 	if (farm_mode)
 	{ 
 		prusa_statistics(8);
 		selectedSerialPort = 1;
 	}
-	else
-		selectedSerialPort = 0;
 	MYSERIAL.begin(BAUDRATE);
 	fdev_setup_stream(uartout, uart_putchar, NULL, _FDEV_SETUP_WRITE); //setup uart out stream
 	stdout = uartout;

Firmware/language_all.cpp

@@ -1505,6 +1505,16 @@ const char * const MSG_SD_WRITE_TO_FILE_LANG_TABLE[1] PROGMEM = {
 	MSG_SD_WRITE_TO_FILE_EN
 };
 
+const char MSG_SECOND_SERIAL_OFF_EN[] PROGMEM = "2nd USART   [off]";
+const char * const MSG_SECOND_SERIAL_OFF_LANG_TABLE[1] PROGMEM = {
+	MSG_SECOND_SERIAL_OFF_EN
+};
+
+const char MSG_SECOND_SERIAL_ON_EN[] PROGMEM = "2nd USART    [on]";
+const char * const MSG_SECOND_SERIAL_ON_LANG_TABLE[1] PROGMEM = {
+	MSG_SECOND_SERIAL_ON_EN
+};
+
 const char MSG_SELFTEST_EN[] PROGMEM = "Selftest         ";
 const char * const MSG_SELFTEST_LANG_TABLE[1] PROGMEM = {
 	MSG_SELFTEST_EN

Firmware/language_all.h

@@ -512,6 +512,10 @@ extern const char* const MSG_SD_WORKDIR_FAIL_LANG_TABLE[1];
 #define MSG_SD_WORKDIR_FAIL LANG_TABLE_SELECT_EXPLICIT(MSG_SD_WORKDIR_FAIL_LANG_TABLE, 0)
 extern const char* const MSG_SD_WRITE_TO_FILE_LANG_TABLE[1];
 #define MSG_SD_WRITE_TO_FILE LANG_TABLE_SELECT_EXPLICIT(MSG_SD_WRITE_TO_FILE_LANG_TABLE, 0)
+extern const char* const MSG_SECOND_SERIAL_OFF_LANG_TABLE[1];
+#define MSG_SECOND_SERIAL_OFF LANG_TABLE_SELECT_EXPLICIT(MSG_SECOND_SERIAL_OFF_LANG_TABLE, 0)
+extern const char* const MSG_SECOND_SERIAL_ON_LANG_TABLE[1];
+#define MSG_SECOND_SERIAL_ON LANG_TABLE_SELECT_EXPLICIT(MSG_SECOND_SERIAL_ON_LANG_TABLE, 0)
 extern const char* const MSG_SELFTEST_LANG_TABLE[1];
 #define MSG_SELFTEST LANG_TABLE_SELECT_EXPLICIT(MSG_SELFTEST_LANG_TABLE, 0)
 extern const char* const MSG_SELFTEST_AXIS_LANG_TABLE[LANG_NUM];

Firmware/language_en.h

@@ -370,3 +370,6 @@
 #define(length=20, lines=2) MSG_UNLOAD_SUCCESSFULL				"Repeat unloading filament?"
 #define(length=20, lines=2) MSG_FILE_INCOMPLETE					"File incomplete. Continue anyway?"
 
+#define(length=17, lines=1) MSG_SECOND_SERIAL_ON				"2nd USART    [on]"
+#define(length=17, lines=1) MSG_SECOND_SERIAL_OFF				"2nd USART   [off]"
+

Firmware/ultralcd.cpp

@@ -3330,6 +3330,13 @@ void lcd_temp_calibration_set() {
 	lcd_goto_menu(lcd_settings_menu, 10);
 }
 
+void lcd_second_serial_set() {
+	if(selectedSerialPort == 1) selectedSerialPort = 0;
+	else selectedSerialPort = 1;
+	eeprom_update_byte((unsigned char *)EEPROM_SECOND_SERIAL_ACTIVE, selectedSerialPort);
+	lcd_goto_menu(lcd_settings_menu, 11);
+}
+
 void lcd_calibrate_pinda() {
 	enquecommand_P(PSTR("G76"));
 	lcd_return_to_status();
@@ -3688,6 +3695,13 @@ static void lcd_settings_menu()
   else {
 	  MENU_ITEM(function, MSG_TEMP_CALIBRATION_ON, lcd_temp_calibration_set);
   }
+  if (selectedSerialPort == false) {
+	  MENU_ITEM(function, MSG_SECOND_SERIAL_OFF, lcd_second_serial_set);
+  }
+  else {
+	  MENU_ITEM(function, MSG_SECOND_SERIAL_ON, lcd_second_serial_set);
+  }
+
   if (SilentModeMenu == 0) {
 	  MENU_ITEM(function, MSG_SILENT_MODE_OFF, lcd_silent_mode_set);
   }