Tweak M600 display resume

- Add startFileprint(); call to M108 display routine to fix progress and ensure "printing done" gets shown
- Add SD printing check in marlin_main.cpp M600 routine to skip TFTstate if not necessary (e.g. USB printing)
- Move routine to the top again to ensure immediate execution

Marlin/AnycubicTFT.cpp

@@ -264,13 +264,14 @@ void AnycubicTFTClass::FilamentChangeResume(){
         HOTEND_LOOP() thermalManager.reset_heater_idle_timer(e); // resume heating if timed out
         wait_for_heatup = false;
         wait_for_user = false; // remove waiting flags
-        // TFTstate=ANYCUBIC_TFT_STATE_SDPRINT;
+        card.startFileprint(); // resume with proper progress state
 #ifdef ANYCUBIC_TFT_DEBUG
         SERIAL_ECHOLNPGM("DEBUG: M108 Resume called");
 #endif
 }
 
 void AnycubicTFTClass::FilamentChangePause(){
+        PausedByFilamentChange=true;
         enqueue_and_echo_commands_P(PSTR("M600"));
         TFTstate=ANYCUBIC_TFT_STATE_SDPAUSE_REQ; // set TFT state to paused
 #ifdef ANYCUBIC_TFT_DEBUG
@@ -329,7 +330,6 @@ void AnycubicTFTClass::HandleSpecialMenu()
                 enqueue_and_echo_commands_P(PSTR("G91\nG1 Z-0.1\nG90"));
         } else if (strcmp(SelectedDirectory, "<filamentchange pause>")==0) {
                 SERIAL_PROTOCOLLNPGM("Special Menu: FilamentChange Pause");
-                PausedByFilamentChange=true;
                 FilamentChangePause();
         } else if (strcmp(SelectedDirectory, "<filamentchange resume>")==0) {
                 SERIAL_PROTOCOLLNPGM("Special Menu: FilamentChange Resume");

Marlin/Marlin_main.cpp

@@ -10992,6 +10992,23 @@ inline void gcode_M502() {
    *  Default values are used for omitted arguments.
    */
   inline void gcode_M600() {
+
+    #ifdef SDSUPPORT
+      if (card.sdprinting) { // are we printing from sd?
+        #ifdef ANYCUBIC_TFT_DEBUG
+            SERIAL_ECHOLNPGM("DEBUG: Enter M600 TFTstate routine");
+        #endif
+        AnycubicTFT.TFTstate=ANYCUBIC_TFT_STATE_SDPAUSE_REQ; // enter correct display state to show resume button
+        #ifdef ANYCUBIC_TFT_DEBUG
+            SERIAL_ECHOLNPGM("DEBUG: Set TFTstate to SDPAUSE_REQ");
+        #endif
+        AnycubicTFT.PausedByFilamentChange=true; // set flag to ensure correct resume routine gets executed
+        #ifdef ANYCUBIC_TFT_DEBUG
+            SERIAL_ECHOLNPGM("DEBUG: Set filament change flag");
+        #endif
+      }
+    #endif
+
     point_t park_point = NOZZLE_PARK_POINT;
 
     if (get_target_extruder_from_command(600)) return;
@@ -11054,19 +11071,6 @@ inline void gcode_M502() {
     const bool job_running = print_job_timer.isRunning();
 
     if (pause_print(retract, park_point, unload_length, true)) {
-      #ifdef SDSUPPORT
-        #ifdef ANYCUBIC_TFT_DEBUG
-            SERIAL_ECHOLNPGM("DEBUG: Enter TFTstate routine");
-        #endif
-        AnycubicTFT.TFTstate=ANYCUBIC_TFT_STATE_SDPAUSE_REQ; // enter correct display state to show resume button
-        #ifdef ANYCUBIC_TFT_DEBUG
-            SERIAL_ECHOLNPGM("DEBUG: Set TFTState to SDPAUSE_REQ");
-        #endif
-        AnycubicTFT.PausedByFilamentChange=true; // set flag to ensure correct resume routine gets executed
-        #ifdef ANYCUBIC_TFT_DEBUG
-            SERIAL_ECHOLNPGM("DEBUG: Set filament change flag");
-        #endif
-      #endif
       wait_for_filament_reload(beep_count);
       resume_print(slow_load_length, fast_load_length, ADVANCED_PAUSE_PURGE_LENGTH, beep_count);
     }
@@ -15139,7 +15143,6 @@ void setup() {
   SERIAL_ECHOPGM(MSG_MARLIN);
   SERIAL_CHAR(' ');
   SERIAL_ECHOLNPGM(SHORT_BUILD_VERSION);
-  SERIAL_CHAR(' ');
   SERIAL_ECHOPGM(MSG_MARLIN_AI3M);
   SERIAL_CHAR(' ');
   SERIAL_ECHOLNPGM(CUSTOM_BUILD_VERSION);

Marlin/Version.h

@@ -41,7 +41,7 @@
    * Defines the version of the Marlin-AI3M build. Not to be confused with
    * Marlin's own build number, e.g. 1.1.9.
    */
-  #define CUSTOM_BUILD_VERSION "v1.4.1"
+  #define CUSTOM_BUILD_VERSION "v1.4.2"
 
   /**
    * Verbose version identifier which should contain a reference to the location
@@ -54,7 +54,7 @@
    * here we define this default string as the date where the latest release
    * version was tagged.
    */
-  #define STRING_DISTRIBUTION_DATE "2019-02-23"
+  #define STRING_DISTRIBUTION_DATE "2019-02-24"
 
   /**
    * Required minimum Configuration.h and Configuration_adv.h file versions.