🎨 Misc. cleanup, comments

Marlin/src/gcode/bedlevel/abl/G29.cpp

@@ -290,6 +290,9 @@ G29_TYPE GcodeSuite::G29() {
                     ry = RAW_Y_POSITION(parser.linearval('Y', NAN));
         int8_t i = parser.byteval('I', -1), j = parser.byteval('J', -1);
 
+        #pragma GCC diagnostic push
+        #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+
         if (!isnan(rx) && !isnan(ry)) {
           // Get nearest i / j from rx / ry
           i = (rx - bilinear_start.x + 0.5 * abl.gridSpacing.x) / abl.gridSpacing.x;
@@ -297,6 +300,9 @@ G29_TYPE GcodeSuite::G29() {
           LIMIT(i, 0, (GRID_MAX_POINTS_X) - 1);
           LIMIT(j, 0, (GRID_MAX_POINTS_Y) - 1);
         }
+
+        #pragma GCC diagnostic pop
+
         if (WITHIN(i, 0, (GRID_MAX_POINTS_X) - 1) && WITHIN(j, 0, (GRID_MAX_POINTS_Y) - 1)) {
           set_bed_leveling_enabled(false);
           z_values[i][j] = rz;

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

@@ -2762,7 +2762,10 @@ void HMI_Prepare() {
       #endif
 
       #if HAS_HOTEND || HAS_HEATED_BED
-        case PREPARE_CASE_COOL: thermalManager.cooldown(); break;
+        case PREPARE_CASE_COOL:
+          thermalManager.cooldown();
+          ui.reset_status();
+          break;
       #endif
 
       case PREPARE_CASE_LANG:

Marlin/src/lcd/touch/touch_buttons.cpp

@@ -79,7 +79,7 @@ uint8_t TouchButtons::read_buttons() {
 
     #if ENABLED(TOUCH_SCREEN_CALIBRATION)
       const calibrationState state = touch_calibration.get_calibration_state();
-      if (state >= CALIBRATION_TOP_LEFT && state <= CALIBRATION_BOTTOM_RIGHT) {
+      if (WITHIN(state, CALIBRATION_TOP_LEFT, CALIBRATION_BOTTOM_RIGHT)) {
         if (touch_calibration.handleTouch(x, y)) ui.refresh();
         return 0;
       }

Marlin/src/module/endstops.cpp

@@ -593,9 +593,6 @@ void _O2 Endstops::report_states() {
 
 } // Endstops::report_states
 
-// The following routines are called from an ISR context. It could be the temperature ISR, the
-// endstop ISR or the Stepper ISR.
-
 #if HAS_DELTA_SENSORLESS_PROBING
   #define __ENDSTOP(AXIS, ...) AXIS ##_MAX
   #define _ENDSTOP_PIN(AXIS, ...) AXIS ##_MAX_PIN
@@ -607,13 +604,18 @@ void _O2 Endstops::report_states() {
 #endif
 #define _ENDSTOP(AXIS, MINMAX) __ENDSTOP(AXIS, MINMAX)
 
-// Check endstops - Could be called from Temperature ISR!
+/**
+ * Called from interrupt context by the Endstop ISR or Stepper ISR!
+ * Read endstops to get their current states, register hits for all
+ * axes moving in the direction of their endstops, and abort moves.
+ */
 void Endstops::update() {
 
-  #if !ENDSTOP_NOISE_THRESHOLD
-    if (!abort_enabled()) return;
+  #if !ENDSTOP_NOISE_THRESHOLD      // If not debouncing...
+    if (!abort_enabled()) return;   // ...and not enabled, exit.
   #endif
 
+  // Macros to update / copy the live_state
   #define UPDATE_ENDSTOP_BIT(AXIS, MINMAX) SET_BIT_TO(live_state, _ENDSTOP(AXIS, MINMAX), (READ(_ENDSTOP_PIN(AXIS, MINMAX)) != _ENDSTOP_INVERTING(AXIS, MINMAX)))
   #define COPY_LIVE_STATE(SRC_BIT, DST_BIT) SET_BIT_TO(live_state, DST_BIT, TEST(live_state, SRC_BIT))
 
@@ -1107,6 +1109,7 @@ void Endstops::update() {
 
 #if ENABLED(SPI_ENDSTOPS)
 
+  // Called from idle() to read Trinamic stall states
   bool Endstops::tmc_spi_homing_check() {
     bool hit = false;
     #if X_SPI_SENSORLESS

Marlin/src/module/stepper.cpp

@@ -2346,13 +2346,9 @@ uint32_t Stepper::block_phase_isr() {
         #endif
       #endif // LASER_POWER_INLINE
 
-      // At this point, we must ensure the movement about to execute isn't
-      // trying to force the head against a limit switch. If using interrupt-
-      // driven change detection, and already against a limit then no call to
-      // the endstop_triggered method will be done and the movement will be
-      // done against the endstop. So, check the limits here: If the movement
-      // is against the limits, the block will be marked as to be killed, and
-      // on the next call to this ISR, will be discarded.
+      // If the endstop is already pressed, endstop interrupts won't invoke
+      // endstop_triggered and the move will grind. So check here for a
+      // triggered endstop, which marks the block for discard on the next ISR.
       endstops.update();
 
       #if ENABLED(Z_LATE_ENABLE)

Marlin/src/sd/cardreader.cpp

@@ -271,9 +271,8 @@ void CardReader::selectByName(SdFile dir, const char * const match) {
  * good addition.
  */
 void CardReader::printListing(
-  SdFile parent
+  SdFile parent, const char * const prepend
   OPTARG(LONG_FILENAME_HOST_SUPPORT, const bool includeLongNames/*=false*/)
-  , const char * const prepend/*=nullptr*/
   OPTARG(LONG_FILENAME_HOST_SUPPORT, const char * const prependLong/*=nullptr*/)
 ) {
   dir_t p;
@@ -283,61 +282,47 @@ void CardReader::printListing(
       size_t lenPrepend = prepend ? strlen(prepend) + 1 : 0;
       // Allocate enough stack space for the full path including / separator
       char path[lenPrepend + FILENAME_LENGTH];
-      if (prepend) {
-        strcpy(path, prepend);
-        path[lenPrepend - 1] = '/';
-      }
+      if (prepend) { strcpy(path, prepend); path[lenPrepend - 1] = '/'; }
       char* dosFilename = path + lenPrepend;
       createFilename(dosFilename, p);
 
       // Get a new directory object using the full path
       // and dive recursively into it.
       SdFile child; // child.close() in destructor
-      if (child.open(&parent, dosFilename, O_READ))
+      if (child.open(&parent, dosFilename, O_READ)) {
         #if ENABLED(LONG_FILENAME_HOST_SUPPORT)
           if (includeLongNames) {
             size_t lenPrependLong = prependLong ? strlen(prependLong) + 1 : 0;
             // Allocate enough stack space for the full long path including / separator
             char pathLong[lenPrependLong + strlen(longFilename) + 1];
-            if (prependLong) {
-              strcpy(pathLong, prependLong);
-              pathLong[lenPrependLong - 1] = '/';
-            }
+            if (prependLong) { strcpy(pathLong, prependLong); pathLong[lenPrependLong - 1] = '/'; }
             strcpy(pathLong + lenPrependLong, longFilename);
-            printListing(child, true, path, pathLong);
+            printListing(child, path, true, pathLong);
           }
           else
-            printListing(child, false, path);
+            printListing(child, path);
         #else
           printListing(child, path);
         #endif
+      }
       else {
         SERIAL_ECHO_MSG(STR_SD_CANT_OPEN_SUBDIR, dosFilename);
         return;
       }
     }
     else if (is_dir_or_gcode(p)) {
-      if (prepend) {
-        SERIAL_ECHO(prepend);
-        SERIAL_CHAR('/');
-      }
+      if (prepend) { SERIAL_ECHO(prepend); SERIAL_CHAR('/'); }
       SERIAL_ECHO(createFilename(filename, p));
       SERIAL_CHAR(' ');
-      #if ENABLED(LONG_FILENAME_HOST_SUPPORT)
-        if (!includeLongNames)
-      #endif
-          SERIAL_ECHOLN(p.fileSize);
-      #if ENABLED(LONG_FILENAME_HOST_SUPPORT)
-        else {
       SERIAL_ECHO(p.fileSize);
+      #if ENABLED(LONG_FILENAME_HOST_SUPPORT)
+        if (includeLongNames) {
           SERIAL_CHAR(' ');
-          if (prependLong) {
-            SERIAL_ECHO(prependLong);
-            SERIAL_CHAR('/');
-          }
-          SERIAL_ECHOLN(longFilename[0] ? longFilename : "???");
+          if (prependLong) { SERIAL_ECHO(prependLong); SERIAL_CHAR('/'); }
+          SERIAL_ECHO(longFilename[0] ? longFilename : "???");
         }
       #endif
+      SERIAL_EOL();
     }
   }
 }
@@ -348,7 +333,7 @@ void CardReader::printListing(
 void CardReader::ls(TERN_(LONG_FILENAME_HOST_SUPPORT, bool includeLongNames/*=false*/)) {
   if (flag.mounted) {
     root.rewind();
-    printListing(root OPTARG(LONG_FILENAME_HOST_SUPPORT, includeLongNames));
+    printListing(root, nullptr OPTARG(LONG_FILENAME_HOST_SUPPORT, includeLongNames));
   }
 }
 

Marlin/src/sd/cardreader.h

@@ -336,9 +336,8 @@ private:
   static void selectByIndex(SdFile dir, const uint8_t index);
   static void selectByName(SdFile dir, const char * const match);
   static void printListing(
-    SdFile parent
+    SdFile parent, const char * const prepend
     OPTARG(LONG_FILENAME_HOST_SUPPORT, const bool includeLongNames=false)
-    , const char * const prepend=nullptr
     OPTARG(LONG_FILENAME_HOST_SUPPORT, const char * const prependLong=nullptr)
   );