V2 Extended NanoDLP_Z_Move_Sync to G4 & G28,Added all axis option.

Marlin/Configuration_adv.h

@@ -1541,13 +1541,16 @@
 #endif
 
 /**
- * NanoDLP Synch support
+ * NanoDLP Sync support
  *
  * Add support for Synchronized Z moves when using with NanoDLP. G0/G1 axis moves will output "Z_move_comp"
  * string to enable synchronization with DLP projector exposure. This change will allow to use
  * [[WaitForDoneMessage]] instead of populating your gcode with M400 commands
- *
  */
- //#define NANODLP_Z_SYNC
+//#define NANODLP_Z_SYNC
+#if ENABLED(NANODLP_Z_SYNC)
+  //#define NANODLP_ALL_AXIS  // Enables "Z_move_comp" output on any axis move.
+                              // Default behaviour is limited to Z axis only.
+#endif
 
 #endif // CONFIGURATION_ADV_H

Marlin/src/gcode/calibrate/G28.cpp

@@ -325,6 +325,15 @@ void GcodeSuite::G28(const bool always_home_all) {
   lcd_refresh();
 
   report_current_position();
+  #if ENABLED(NANODLP_Z_SYNC)
+    #if ENABLED(NANODLP_ALL_AXIS)
+      #define _HOME_SYNC true                 // For any axis, output sync text.
+    #else
+      #define _HOME_SYNC (home_all || homeZ)  // Only for Z-axis
+    #endif
+    if (_HOME_SYNC)
+      SERIAL_ECHOLNPGM(MSG_Z_MOVE_COMP);
+  #endif
 
   #if ENABLED(DEBUG_LEVELING_FEATURE)
     if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("<<< G28");

Marlin/src/gcode/motion/G0_G1.cpp

@@ -78,8 +78,12 @@ void GcodeSuite::G0_G1(
     #endif
 
     #if ENABLED(NANODLP_Z_SYNC)
-      // If G0/G1 command include Z-axis, wait for move and output sync text.
-      if (parser.seenval('Z')) {
+      #if ENABLED(NANODLP_ALL_AXIS)
+        #define _MOVE_SYNC true                 // For any move wait and output sync message
+      #else
+        #define _MOVE_SYNC parser.seenval('Z')  // Only for Z move
+      #endif
+      if (_MOVE_SYNC) {
         stepper.synchronize();
         SERIAL_ECHOLNPGM(MSG_Z_MOVE_COMP);
       }

Marlin/src/gcode/motion/G4.cpp

@@ -34,6 +34,9 @@ void GcodeSuite::G4() {
   if (parser.seenval('S')) dwell_ms = parser.value_millis_from_seconds(); // seconds to wait
 
   stepper.synchronize();
+  #if ENABLED(NANODLP_Z_SYNC)
+    SERIAL_ECHOLNPGM(MSG_Z_MOVE_COMP);
+  #endif
 
   if (!lcd_hasstatus()) LCD_MESSAGEPGM(MSG_DWELL);