Optimize some G-code strings

Marlin/src/gcode/calibrate/G76_M192_M871.cpp

 #include "../../feature/probe_temp_comp.h"
 
 #include "../../lcd/marlinui.h"
-#include "../../MarlinCore.h" // for wait_for_heatup and idle()
+#include "../../MarlinCore.h" // for wait_for_heatup, idle(), G28_STR
 
 #if ENABLED(PRINTJOB_TIMER_AUTOSTART)
   #include "../../module/printcounter.h"
       return;
     }
 
-    process_subcommands_now_P(PSTR("G28"));
+    process_subcommands_now_P(G28_STR);
   }
 
   remember_feedrate_scaling_off();

Marlin/src/lcd/dwin/e3v2/dwin.cpp

       case PREPARE_CASE_HOME: // Homing
         checkkey = Last_Prepare;
         index_prepare = MROWS;
-        queue.inject_P(PSTR("G28")); // G28 will set home_flag
+        queue.inject_P(G28_STR); // G28 will set home_flag
         Popup_Window_Home();
         break;
       #if HAS_ZOFFSET_ITEM

Marlin/src/lcd/extui/lib/anycubic_chiron/chiron_tft.cpp

       case 21:   // A21 Home Axis  A21 X
         if (!isPrinting()) {
           switch ((char)panel_command[4]) {
-            case 'X': injectCommands_P(PSTR("G28 X")); break;
-            case 'Y': injectCommands_P(PSTR("G28 Y")); break;
-            case 'Z': injectCommands_P(PSTR("G28 Z")); break;
-            case 'C': injectCommands_P(PSTR("G28")); break;
+            case 'X': injectCommands_P(PSTR("G28X")); break;
+            case 'Y': injectCommands_P(PSTR("G28Y")); break;
+            case 'Z': injectCommands_P(PSTR("G28Z")); break;
+            case 'C': injectCommands_P(G28_STR); break;
           }
         }
         break;
           // If the same meshpoint is selected twice in a row, move the head to that ready for adjustment
           if ((selectedmeshpoint.x == pos.x) && (selectedmeshpoint.y == pos.y)) {
             if (!isPositionKnown())
-              injectCommands_P(PSTR("G28")); // home
+              injectCommands_P(G28_STR); // home
 
             if (isPositionKnown()) {
               #if ACDEBUG(AC_INFO)
           if (isPrinting())
             SendtoTFTLN(AC_msg_probing_not_allowed); // forbid auto leveling
           else {
-            injectCommands_P(isMachineHomed() ? PSTR("G29") : PSTR("G28\nG29"));
+            injectCommands_P(PSTR("G28O\nG29"));
             printer_state = AC_printer_probing;
             SendtoTFTLN(AC_msg_start_probing);
           }

Marlin/src/lcd/extui/lib/anycubic_chiron/chiron_tft_defs.h

 
 #define AC_cmnd_manual_load_filament   PSTR("M83\nG1 E50 F700\nM82")   // replace the manual panel commands with something a little faster
 #define AC_cmnd_manual_unload_filament PSTR("M83\nG1 E-50 F1200\nM82")
-#define AC_cmnd_enable_leveling        PSTR("M420 S1 V1")
-#define AC_cmnd_power_loss_recovery    PSTR("G28 X Y R5\nG28 Z")       // Lift, home X and Y then home Z when in 'safe' position
+#define AC_cmnd_enable_leveling        PSTR("M420SV")
+#define AC_cmnd_power_loss_recovery    PSTR("G28XYR5\nG28Z")           // Lift, home X and Y then home Z when in 'safe' position
 
 namespace Anycubic {
   enum heater_state_t : uint8_t {

Marlin/src/lcd/extui/lib/anycubic_i3mega/anycubic_i3mega_lcd.cpp

 
 #include "../../../../libs/numtostr.h"
 #include "../../../../module/motion.h"  // for A20 read printing speed feedrate_percentage
-#include "../../../../MarlinCore.h"     // for quickstop_stepper and disable_steppers
+#include "../../../../MarlinCore.h"     // for quickstop_stepper, disable_steppers, G28_STR
 #include "../../../../inc/MarlinConfig.h"
 
 // command sending macro's with debugging capability
 
               case '6': // "<06SMeshLvl>"
                 SERIAL_ECHOLNPGM("Special Menu: Start Mesh Leveling");
-                ExtUI::injectCommands_P(PSTR("G29 S1"));
+                ExtUI::injectCommands_P(PSTR("G29S1"));
                 break;
 
               case '7': // "<07MeshNPnt>"
                 SERIAL_ECHOLNPGM("Special Menu: Next Mesh Point");
-                ExtUI::injectCommands_P(PSTR("G29 S2"));
+                ExtUI::injectCommands_P(PSTR("G29S2"));
                 break;
 
               case '8': // "<08HtEndPID>"
             if (!ExtUI::isPrinting() && !ExtUI::isPrintingFromMediaPaused()) {
               if (CodeSeen('X') || CodeSeen('Y') || CodeSeen('Z')) {
                 if (CodeSeen('X'))
-                  ExtUI::injectCommands_P(PSTR("G28 X"));
+                  ExtUI::injectCommands_P(PSTR("G28X"));
                 if (CodeSeen('Y'))
-                  ExtUI::injectCommands_P(PSTR("G28 Y"));
+                  ExtUI::injectCommands_P(PSTR("G28Y"));
                 if (CodeSeen('Z'))
-                  ExtUI::injectCommands_P(PSTR("G28 Z"));
+                  ExtUI::injectCommands_P(PSTR("G28Z"));
               }
               else if (CodeSeen('C')) {
-                ExtUI::injectCommands_P(PSTR("G28"));
+                ExtUI::injectCommands_P(G28_STR);
               }
             }
             break;

Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/bio_status_screen.cpp

     case  9: GOTO_SCREEN(FilesScreen); break;
     case 10: GOTO_SCREEN(MainMenu); break;
     case 13: GOTO_SCREEN(BioConfirmHomeE); break;
-    case 14: SpinnerDialogBox::enqueueAndWait_P(F("G28 Z")); break;
+    case 14: SpinnerDialogBox::enqueueAndWait_P(F("G28Z")); break;
     case 15: GOTO_SCREEN(TemperatureScreen);  break;
     case 16: fine_motion = !fine_motion; break;
     default: return false;

Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/move_axis_screen.cpp

     case 14: UI_DECREMENT_AXIS(E3); screen_data.MoveAxis.e_rel[3] -= increment; break;
     case 15: UI_INCREMENT_AXIS(E3); screen_data.MoveAxis.e_rel[3] += increment; break;
     #endif
-    case 20: SpinnerDialogBox::enqueueAndWait_P(F("G28 X")); break;
-    case 21: SpinnerDialogBox::enqueueAndWait_P(F("G28 Y")); break;
-    case 22: SpinnerDialogBox::enqueueAndWait_P(F("G28 Z")); break;
+    case 20: SpinnerDialogBox::enqueueAndWait_P(F("G28X")); break;
+    case 21: SpinnerDialogBox::enqueueAndWait_P(F("G28Y")); break;
+    case 22: SpinnerDialogBox::enqueueAndWait_P(F("G28Z")); break;
     case 23: SpinnerDialogBox::enqueueAndWait_P(F("G28"));   break;
     default:
       return false;

Marlin/src/lcd/extui/lib/mks_ui/draw_home.cpp

 #include "../../../../gcode/queue.h"
 #include "../../../../inc/MarlinConfig.h"
 
+extern const char G28_STR[];
+
 extern lv_group_t *g;
 static lv_obj_t *scr;
 
   if (event != LV_EVENT_RELEASED) return;
   switch (obj->mks_obj_id) {
     case ID_H_ALL:
-      queue.inject_P(PSTR("G28"));
+      queue.inject_P(G28_STR);
       break;
     case ID_H_X:
-      queue.inject_P(PSTR("G28 X0"));
+      queue.inject_P(PSTR("G28X"));
       break;
     case ID_H_Y:
-      queue.inject_P(PSTR("G28 Y0"));
+      queue.inject_P(PSTR("G28Y"));
       break;
     case ID_H_Z:
-      queue.inject_P(PSTR("G28 Z0"));
+      queue.inject_P(PSTR("G28Z"));
       break;
     case ID_H_OFF_ALL:
       queue.inject_P(PSTR("M84"));
       break;
     case ID_H_OFF_XY:
-      queue.inject_P(PSTR("M84 X Y"));
+      queue.inject_P(PSTR("M84XY"));
       break;
     case ID_H_RETURN:
       clear_cur_ui();

Marlin/src/lcd/extui/lib/mks_ui/draw_manuaLevel.cpp

 #include "../../../../gcode/queue.h"
 #include "../../../../inc/MarlinConfig.h"
 
+extern const char G28_STR[];
+
 extern lv_group_t *g;
 static lv_obj_t *scr;
 
   if (event != LV_EVENT_RELEASED) return;
 
   switch (obj->mks_obj_id) {
-    case ID_M_POINT1:
-      if (queue.length == 0) {
-        if (uiCfg.leveling_first_time) {
-          queue.enqueue_now_P(PSTR("G28"));
-          uiCfg.leveling_first_time = 0;
-        }
-        queue.enqueue_now_P(PSTR("G1 Z10"));
-        sprintf_P(public_buf_l, PSTR("G1 X%d Y%d"), (int)gCfgItems.levelingPos[0][0], (int)gCfgItems.levelingPos[0][1]);
-        queue.enqueue_one_now(public_buf_l);
-        queue.enqueue_now_P(PSTR("G1 Z0"));
-      }
-      break;
-    case ID_M_POINT2:
-      if (queue.length == 0) {
-        if (uiCfg.leveling_first_time) {
-          queue.enqueue_now_P(PSTR("G28"));
-          uiCfg.leveling_first_time = 0;
-        }
-        queue.enqueue_now_P(PSTR("G1 Z10"));
-        sprintf_P(public_buf_l, PSTR("G1 X%d Y%d"), (int)gCfgItems.levelingPos[1][0], (int)gCfgItems.levelingPos[1][1]);
-        queue.enqueue_one_now(public_buf_l);
-        queue.enqueue_now_P(PSTR("G1 Z0"));
-      }
-      break;
-    case ID_M_POINT3:
-      if (queue.length == 0) {
-        if (uiCfg.leveling_first_time) {
-          queue.enqueue_now_P(PSTR("G28"));
-          uiCfg.leveling_first_time = 0;
-        }
-        queue.enqueue_now_P(PSTR("G1 Z10"));
-        sprintf_P(public_buf_l, PSTR("G1 X%d Y%d"), (int)gCfgItems.levelingPos[2][0], (int)gCfgItems.levelingPos[2][1]);
-        queue.enqueue_one_now(public_buf_l);
-        queue.enqueue_now_P(PSTR("G1 Z0"));
-      }
-
-      break;
-    case ID_M_POINT4:
-      if (queue.length == 0) {
-        if (uiCfg.leveling_first_time) {
-          queue.enqueue_now_P(PSTR("G28"));
-          uiCfg.leveling_first_time = 0;
-        }
-        queue.enqueue_now_P(PSTR("G1 Z10"));
-        sprintf_P(public_buf_l, PSTR("G1 X%d Y%d"), (int)gCfgItems.levelingPos[3][0], (int)gCfgItems.levelingPos[3][1]);
-        queue.enqueue_one_now(public_buf_l);
-        queue.enqueue_now_P(PSTR("G1 Z0"));
-      }
-      break;
-    case ID_M_POINT5:
+    case ID_M_POINT1 ... ID_M_POINT5:
       if (queue.length == 0) {
         if (uiCfg.leveling_first_time) {
-          queue.enqueue_now_P(PSTR("G28"));
-          uiCfg.leveling_first_time = 0;
+          uiCfg.leveling_first_time = false;
+          queue.inject_P(G28_STR);
         }
-        queue.enqueue_now_P(PSTR("G1 Z10"));
-        sprintf_P(public_buf_l, PSTR("G1 X%d Y%d"), (int)gCfgItems.levelingPos[4][0], (int)gCfgItems.levelingPos[4][1]);
-        queue.enqueue_one_now(public_buf_l);
-        queue.enqueue_now_P(PSTR("G1 Z0"));
+        const int ind = obj->mks_obj_id - ID_M_POINT1;
+        sprintf_P(public_buf_l, PSTR("G1 Z10\nG1 X%d Y%d\nG1 Z0"), (int)gCfgItems.levelingPos[ind][0], (int)gCfgItems.levelingPos[ind][1]);
+        queue.inject(public_buf_l);
       }
       break;
     case ID_MANUAL_RETURN:

Marlin/src/lcd/menu/menu_bed_leveling.cpp

         ui.wait_for_move = true;
         ui.goto_screen(_lcd_level_bed_done);
         #if ENABLED(MESH_BED_LEVELING)
-          queue.inject_P(PSTR("G29 S2"));
+          queue.inject_P(PSTR("G29S2"));
         #elif ENABLED(PROBE_MANUALLY)
-          queue.inject_P(PSTR("G29 V1"));
+          queue.inject_P(PSTR("G29V1"));
         #endif
       }
       else
     // G29 Records Z, moves, and signals when it pauses
     ui.wait_for_move = true;
     #if ENABLED(MESH_BED_LEVELING)
-      queue.inject_P(manual_probe_index ? PSTR("G29 S2") : PSTR("G29 S1"));
+      queue.inject_P(manual_probe_index ? PSTR("G29S2") : PSTR("G29S1"));
     #elif ENABLED(PROBE_MANUALLY)
-      queue.inject_P(PSTR("G29 V1"));
+      queue.inject_P(PSTR("G29V1"));
     #endif
   }
 

Marlin/src/lcd/menu/menu_motion.cpp

   #endif
 
   #if ENABLED(Z_MIN_PROBE_REPEATABILITY_TEST)
-    GCODES_ITEM(MSG_M48_TEST, PSTR("G28 O\nM48 P10"));
+    GCODES_ITEM(MSG_M48_TEST, PSTR("G28O\nM48 P10"));
   #endif
 
   //