[2.0.x] Enhancements to FILAMENT_RUNOUT_SENSOR (#12069)

- Added FILAMENT_RUNOUT_DISTANCE_MM option
- Added FILAMENT_MOTION_SENSOR option

Marlin/src/module/planner.h

@@ -83,7 +83,7 @@ enum BlockFlag : char {
  * The "nominal" values are as-specified by gcode, and
  * may never actually be reached due to acceleration limits.
  */
-typedef struct {
+typedef struct block_t {
 
   volatile uint8_t flag;                    // Block flags (See BlockFlag enum above) - Modified by ISR and main thread!
 
@@ -109,6 +109,8 @@ typedef struct {
 
   #if EXTRUDERS > 1
     uint8_t extruder;                       // The extruder to move (if E move)
+  #else
+    static constexpr uint8_t extruder = 0;
   #endif
 
   #if ENABLED(MIXING_EXTRUDER)

Marlin/src/module/stepper.cpp

@@ -109,6 +109,10 @@
 
 Stepper stepper; // Singleton
 
+#if FILAMENT_RUNOUT_DISTANCE_MM > 0
+  #include "../feature/runout.h"
+#endif
+
 // public:
 
 #if ENABLED(X_DUAL_ENDSTOPS) || ENABLED(Y_DUAL_ENDSTOPS) || Z_MULTI_ENDSTOPS
@@ -1473,6 +1477,9 @@ uint32_t Stepper::stepper_block_phase_isr() {
 
     // If current block is finished, reset pointer
     if (step_events_completed >= step_event_count) {
+      #if FILAMENT_RUNOUT_DISTANCE_MM > 0
+        runout.block_complete(current_block);
+      #endif
       axis_did_move = 0;
       current_block = NULL;
       planner.discard_current_block();