Implement filament change continuous purge

.travis.yml

@@ -116,7 +116,7 @@ script:
   #      ULTIMAKERCONTROLLER, FILAMENT_LCD_DISPLAY, FILAMENT_WIDTH_SENSOR,
   #      PRINTCOUNTER, NOZZLE_PARK_FEATURE, NOZZLE_CLEAN_FEATURE, PCA9632,
   #      Z_DUAL_STEPPER_DRIVERS, Z_DUAL_ENDSTOPS, BEZIER_CURVE_SUPPORT, EXPERIMENTAL_I2CBUS,
-  #      ADVANCED_PAUSE_FEATURE, PARK_HEAD_ON_PAUSE, LCD_INFO_MENU,
+  #      ADVANCED_PAUSE_FEATURE, ADVANCED_PAUSE_CONTINUOUS_PURGE, PARK_HEAD_ON_PAUSE, LCD_INFO_MENU,
   #      EEPROM_SETTINGS, EEPROM_CHITCHAT, M100_FREE_MEMORY_WATCHER,
   #      INCH_MODE_SUPPORT, TEMPERATURE_UNITS_SUPPORT
   #
@@ -127,7 +127,7 @@ script:
   - opt_enable ULTIMAKERCONTROLLER SDSUPPORT
   - opt_enable PRINTCOUNTER NOZZLE_PARK_FEATURE NOZZLE_CLEAN_FEATURE PCA9632 USE_XMAX_PLUG
   - opt_enable_adv BEZIER_CURVE_SUPPORT EXPERIMENTAL_I2CBUS
-  - opt_enable_adv ADVANCED_PAUSE_FEATURE FILAMENT_LOAD_UNLOAD_GCODES PARK_HEAD_ON_PAUSE LCD_INFO_MENU M114_DETAIL
+  - opt_enable_adv ADVANCED_PAUSE_FEATURE ADVANCED_PAUSE_CONTINUOUS_PURGE FILAMENT_LOAD_UNLOAD_GCODES PARK_HEAD_ON_PAUSE LCD_INFO_MENU M114_DETAIL
   - opt_set_adv PWM_MOTOR_CURRENT {1300,1300,1250}
   - opt_set_adv I2C_SLAVE_ADDRESS 63
   - build_marlin_pio ${TRAVIS_BUILD_DIR} ${TEST_PLATFORM}

Marlin/Configuration_adv.h

@@ -921,6 +921,7 @@
   #define FILAMENT_UNLOAD_RETRACT_LENGTH 13   // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_DELAY 5000          // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH 8      // (mm) An unretract is done, then this length is purged.
+  //#define ADVANCED_PAUSE_CONTINUOUS_PURGE   // Purge continuously up to the purge length until interrupted.
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT 45        // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS 10      // Number of alert beeps to play when a response is needed.

Marlin/src/feature/pause.cpp

@@ -187,6 +187,20 @@ bool load_filament(const float &load_length/*=0*/, const float &purge_length/*=0
   // Load filament
   if (load_length) do_pause_e_move(load_length, FILAMENT_CHANGE_LOAD_FEEDRATE);
 
+  #if ENABLED(ADVANCED_PAUSE_CONTINUOUS_PURGE)
+
+    #if ENABLED(ULTIPANEL)
+      if (show_lcd)
+        lcd_advanced_pause_show_message(ADVANCED_PAUSE_MESSAGE_CONTINUOUS_PURGE);
+    #endif
+
+    wait_for_user = true;
+    for (float purge_count = purge_length; purge_count > 0 && wait_for_user; --purge_count)
+      do_pause_e_move(1, ADVANCED_PAUSE_EXTRUDE_FEEDRATE);
+    wait_for_user = false;
+
+  #else
+
     do {
       if (purge_length > 0) {
         // "Wait for filament purge"
@@ -219,6 +233,8 @@ bool load_filament(const float &load_length/*=0*/, const float &purge_length/*=0
       #endif
     );
 
+  #endif      
+
   return true;
 }
 

Marlin/src/feature/pause.h

@@ -44,6 +44,9 @@ enum AdvancedPauseMessage : char {
   ADVANCED_PAUSE_MESSAGE_INSERT,
   ADVANCED_PAUSE_MESSAGE_LOAD,
   ADVANCED_PAUSE_MESSAGE_PURGE,
+  #if ENABLED(ADVANCED_PAUSE_CONTINUOUS_PURGE)
+    ADVANCED_PAUSE_MESSAGE_CONTINUOUS_PURGE,
+  #endif
   ADVANCED_PAUSE_MESSAGE_OPTION,
   ADVANCED_PAUSE_MESSAGE_RESUME,
   ADVANCED_PAUSE_MESSAGE_STATUS,

Marlin/src/lcd/ultralcd.cpp

@@ -218,14 +218,6 @@ uint16_t max_display_update_time = 0;
     #else
       void lcd_temp_menu_e0_filament_change();
     #endif
-    void lcd_advanced_pause_option_menu();
-    void lcd_advanced_pause_init_message();
-    void lcd_advanced_pause_unload_message();
-    void lcd_advanced_pause_insert_message();
-    void lcd_advanced_pause_load_message();
-    void lcd_advanced_pause_heat_nozzle();
-    void lcd_advanced_pause_purge_message();
-    void lcd_advanced_pause_resume_message();
   #endif
 
   #if ENABLED(DAC_STEPPER_CURRENT)
@@ -4602,6 +4594,31 @@ void kill_screen(const char* lcd_msg) {
       END_SCREEN();
     }
 
+    #if ENABLED(ADVANCED_PAUSE_CONTINUOUS_PURGE)
+      void lcd_advanced_pause_continuous_purge_menu() {
+        START_SCREEN();
+        STATIC_ITEM(MSG_FILAMENT_CHANGE_PURGE_1);
+        #ifdef MSG_FILAMENT_CHANGE_PURGE_2
+          STATIC_ITEM(MSG_FILAMENT_CHANGE_PURGE_2);
+          #define __FC_LINES_G 3
+        #else
+          #define __FC_LINES_G 2
+        #endif
+        #ifdef MSG_FILAMENT_CHANGE_PURGE_3
+          STATIC_ITEM(MSG_FILAMENT_CHANGE_PURGE_3);
+          #define _FC_LINES_G (__FC_LINES_G + 1)
+        #else
+          #define _FC_LINES_G __FC_LINES_G
+        #endif
+        #if LCD_HEIGHT > _FC_LINES_G + 1
+          STATIC_ITEM(" ");
+        #endif
+        HOTEND_STATUS_ITEM();
+        STATIC_ITEM(MSG_USERWAIT);
+        END_SCREEN();
+      }
+    #endif
+
     void lcd_advanced_pause_resume_message() {
       START_SCREEN();
       STATIC_ITEM_P(advanced_pause_header(), true, true);
@@ -4627,6 +4644,9 @@ void kill_screen(const char* lcd_msg) {
         case ADVANCED_PAUSE_MESSAGE_WAIT_FOR_NOZZLES_TO_HEAT: return lcd_advanced_pause_wait_for_nozzles_to_heat;
         case ADVANCED_PAUSE_MESSAGE_OPTION: advanced_pause_menu_response = ADVANCED_PAUSE_RESPONSE_WAIT_FOR;
                                             return lcd_advanced_pause_option_menu;
+        #if ENABLED(ADVANCED_PAUSE_CONTINUOUS_PURGE)
+          case ADVANCED_PAUSE_MESSAGE_CONTINUOUS_PURGE: return lcd_advanced_pause_continuous_purge_menu;                                                                                              
+        #endif
         case ADVANCED_PAUSE_MESSAGE_STATUS:
         default: break;
       }