host keep alive multi material messages, load filament for multi material

Firmware/Marlin_main.cpp

@@ -3332,6 +3332,7 @@ void process_commands()
 			current_position[E_AXIS] += DEFAULT_RETRACTION;
 			plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 400, active_extruder);
 		}
+		KEEPALIVE_STATE(NOT_BUSY);
 		// Restore custom message state
 		custom_message = custom_message_old;
 		custom_message_type = custom_message_type_old;
@@ -5381,11 +5382,13 @@ case 404:  //M404 Enter the nominal filament width (3mm, 1.75mm ) N<3.0> or disp
 		WRITE(BEEPER, LOW);
 #ifdef SNMM
 		display_loading();
+		KEEPALIVE_STATE(PAUSED_FOR_USER);
 		do {
 			target[E_AXIS] += 0.002;
 			plan_buffer_line(target[X_AXIS], target[Y_AXIS], target[Z_AXIS], target[E_AXIS], 500, active_extruder);
 			delay_keep_alive(2);
-		} while (!lcd_clicked());		
+		} while (!lcd_clicked());
+		KEEPALIVE_STATE(IN_HANDLER);
 		/*if (millis() - load_filament_time > 2) {
 			load_filament_time = millis();
 			target[E_AXIS] += 0.001;
@@ -5600,6 +5603,9 @@ case 404:  //M404 Enter the nominal filament width (3mm, 1.75mm ) N<3.0> or disp
     break;
 	case 701: //M701: load filament
 	{
+#ifdef SNMM
+		extr_adj(snmm_extruder);//loads current extruder
+#else
 		enable_z();
 		custom_message = true;
 		custom_message_type = 2;
@@ -5631,6 +5637,7 @@ case 404:  //M404 Enter the nominal filament width (3mm, 1.75mm ) N<3.0> or disp
 		loading_flag = false;
 		custom_message = false;
 		custom_message_type = 0;
+#endif
 	}
 	break;
 	case 702:

Firmware/ultralcd.cpp

@@ -3009,7 +3009,7 @@ static char snmm_stop_print_menu() { //menu for choosing which filaments will be
 	lcd_print_at_PGM(1,3,MSG_CURRENT);
 	char cursor_pos = 1;
 	int enc_dif = 0;
-
+	KEEPALIVE_STATE(PAUSED_FOR_USER);
 	while (1) {
 		manage_heater();
 		manage_inactivity(true);
@@ -3037,10 +3037,10 @@ static char snmm_stop_print_menu() { //menu for choosing which filaments will be
 			while (lcd_clicked());
 			delay(10);
 			while (lcd_clicked());
+			KEEPALIVE_STATE(IN_HANDLER);
 			return(cursor_pos - 1);
 		}
-	}
-	
+	}	
 }
 
 char choose_extruder_menu() {
@@ -3059,7 +3059,7 @@ char choose_extruder_menu() {
 	for (int i = 0; i < 3; i++) {
 		lcd_print_at_PGM(1, i + 1, MSG_EXTRUDER);
 	}
-
+	KEEPALIVE_STATE(PAUSED_FOR_USER);
 	while (1) {
 
 		for (int i = 0; i < 3; i++) {
@@ -3123,6 +3123,7 @@ char choose_extruder_menu() {
 			while (lcd_clicked());
 			delay(10);
 			while (lcd_clicked());
+			KEEPALIVE_STATE(IN_HANDLER);
 			return(cursor_pos + first - 1);
 			
 		}
@@ -3317,7 +3318,7 @@ void display_loading() {
 	}
 }
 
-static void extr_adj(int extruder) //loading filament for SNMM
+void extr_adj(int extruder) //loading filament for SNMM
 {
 	bool correct;
 	max_feedrate[E_AXIS] =80;
@@ -3331,13 +3332,13 @@ static void extr_adj(int extruder) //loading filament for SNMM
 	case 3: lcd_display_message_fullscreen_P(MSG_FILAMENT_LOADING_T3); break;
 	default: lcd_display_message_fullscreen_P(MSG_FILAMENT_LOADING_T0); break;   
 	}
-			
+	KEEPALIVE_STATE(PAUSED_FOR_USER);
 	do{
 		extr_mov(0.001,1000);
 		delay_keep_alive(2);
 	} while (!lcd_clicked());
 	//delay_keep_alive(500);
-
+	KEEPALIVE_STATE(IN_HANDLER);
 	st_synchronize();
 	//correct = lcd_show_fullscreen_message_yes_no_and_wait_P(MSG_FIL_LOADED_CHECK, false);
 	//if (!correct) goto	START;

Firmware/ultralcd.h

@@ -211,7 +211,7 @@ extern void lcd_implementation_print_at(uint8_t x, uint8_t y, const char *str);
 void change_extr(int extr);
 static void lcd_colorprint_change();
 static int get_ext_nr();
-static void extr_adj(int extruder);
+void extr_adj(int extruder);
 static void extr_adj_0();
 static void extr_adj_1();
 static void extr_adj_2();