Apply GRID_LOOP

Marlin/src/feature/bedlevel/ubl/ubl.cpp

@@ -49,8 +49,7 @@
   void unified_bed_leveling::report_current_mesh() {
     if (!leveling_is_valid()) return;
     SERIAL_ECHO_MSG("  G29 I99");
-    LOOP_L_N(x, GRID_MAX_POINTS_X)
+    GRID_LOOP(x, y)
-      for (uint8_t y = 0;  y < GRID_MAX_POINTS_Y; y++)
       if (!isnan(z_values[x][y])) {
         SERIAL_ECHO_START();
         SERIAL_ECHOPAIR("  M421 I", int(x), " J", int(y));

Marlin/src/gcode/bedlevel/M420.cpp

@@ -155,17 +155,14 @@ void GcodeSuite::M420() {
 
             // Get the sum and average of all mesh values
             float mesh_sum = 0;
-            for (uint8_t x = GRID_MAX_POINTS_X; x--;)
+            GRID_LOOP(x, y) mesh_sum += Z_VALUES(x, y);
-              for (uint8_t y = GRID_MAX_POINTS_Y; y--;)
-                mesh_sum += Z_VALUES(x, y);
             const float zmean = mesh_sum / float(GRID_MAX_POINTS);
 
           #else
 
             // Find the low and high mesh values
             float lo_val = 100, hi_val = -100;
-            for (uint8_t x = GRID_MAX_POINTS_X; x--;)
+            GRID_LOOP(x, y) {
-              for (uint8_t y = GRID_MAX_POINTS_Y; y--;) {
               const float z = Z_VALUES(x, y);
               NOMORE(lo_val, z);
               NOLESS(hi_val, z);
@@ -179,8 +176,7 @@ void GcodeSuite::M420() {
           if (!NEAR_ZERO(zmean)) {
             set_bed_leveling_enabled(false);
             // Subtract the mean from all values
-            for (uint8_t x = GRID_MAX_POINTS_X; x--;)
+            GRID_LOOP(x, y) {
-              for (uint8_t y = GRID_MAX_POINTS_Y; y--;) {
               Z_VALUES(x, y) -= zmean;
               #if ENABLED(EXTENSIBLE_UI)
                 ExtUI::onMeshUpdate(x, y, Z_VALUES(x, y));