✨ Configurable FREEZE pin state (#23944)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/Configuration_adv.h

@@ -4116,6 +4116,7 @@
 //#define FREEZE_FEATURE
 #if ENABLED(FREEZE_FEATURE)
   //#define FREEZE_PIN 41   // Override the default (KILL) pin here
+  #define FREEZE_STATE LOW  // State of pin indicating freeze
 #endif
 
 /**

Marlin/src/MarlinCore.cpp

@@ -476,7 +476,7 @@ inline void manage_inactivity(const bool no_stepper_sleep=false) {
   #endif
 
   #if HAS_FREEZE_PIN
-    Stepper::frozen = !READ(FREEZE_PIN);
+    Stepper::frozen = READ(FREEZE_PIN) ^ DISABLED(INVERT_FREEZE_PIN);
   #endif
 
   #if HAS_HOME
@@ -1166,9 +1166,13 @@ void setup() {
     #endif
   #endif
 
-  #if HAS_FREEZE_PIN
+  #if ENABLED(FREEZE_FEATURE)
     SETUP_LOG("FREEZE_PIN");
-    SET_INPUT_PULLUP(FREEZE_PIN);
+    #if FREEZE_STATE
+      SET_INPUT_PULLDOWN(FREEZE_PIN);
+    #else
+      SET_INPUT_PULLUP(FREEZE_PIN);
+    #endif
   #endif
 
   #if HAS_SUICIDE

Marlin/src/inc/Conditionals_post.h

@@ -2824,17 +2824,9 @@
 #endif
 
 // User Interface
-#if ENABLED(FREEZE_FEATURE)
-  #if !PIN_EXISTS(FREEZE) && PIN_EXISTS(KILL)
-    #define FREEZE_PIN KILL_PIN
-  #endif
-  #if PIN_EXISTS(FREEZE)
-    #define HAS_FREEZE_PIN 1
-  #endif
-#else
-  #undef FREEZE_PIN
-#endif
-#if PIN_EXISTS(KILL) && TERN1(FREEZE_FEATURE, KILL_PIN != FREEZE_PIN)
+#if ENABLED(FREEZE_FEATURE) && !PIN_EXISTS(FREEZE) && PIN_EXISTS(KILL)
+  #define FREEZE_PIN KILL_PIN
+#elif PIN_EXISTS(KILL) && TERN1(FREEZE_FEATURE, KILL_PIN != FREEZE_PIN)
   #define HAS_KILL 1
 #endif
 #if PIN_EXISTS(HOME)

Marlin/src/inc/SanityCheck.h

@@ -1035,8 +1035,8 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
 /**
  * Instant Freeze
  */
-#if ENABLED(FREEZE_FEATURE) && !PIN_EXISTS(FREEZE)
-  #error "FREEZE_FEATURE requires a FREEZE_PIN to be defined."
+#if ENABLED(FREEZE_FEATURE) && !(PIN_EXISTS(FREEZE) && defined(FREEZE_STATE))
+  #error "FREEZE_FEATURE requires both FREEZE_PIN and FREEZE_STATE."
 #endif
 
 /**

Marlin/src/module/stepper.cpp

@@ -189,7 +189,7 @@ bool Stepper::abort_current_block;
 uint32_t Stepper::acceleration_time, Stepper::deceleration_time;
 uint8_t Stepper::steps_per_isr;
 
-#if HAS_FREEZE_PIN
+#if ENABLED(FREEZE_FEATURE)
   bool Stepper::frozen; // = false
 #endif
 
@@ -1643,7 +1643,7 @@ void Stepper::pulse_phase_isr() {
   if (!current_block) return;
 
   // Skipping step processing causes motion to freeze
-  if (TERN0(HAS_FREEZE_PIN, frozen)) return;
+  if (TERN0(FREEZE_FEATURE, frozen)) return;
 
   // Count of pending loops and events for this iteration
   const uint32_t pending_events = step_event_count - step_events_completed;

Marlin/src/module/stepper.h

@@ -336,7 +336,7 @@ class Stepper {
       static constexpr uint8_t last_moved_extruder = 0;
     #endif
 
-    #if HAS_FREEZE_PIN
+    #if ENABLED(FREEZE_FEATURE)
       static bool frozen;                   // Set this flag to instantly freeze motion
     #endif
 

Marlin/src/pins/pinsDebug_list.h

@@ -823,7 +823,7 @@
 #if HAS_KILL
   REPORT_NAME_DIGITAL(__LINE__, KILL_PIN)
 #endif
-#if HAS_FREEZE_PIN
+#if PIN_EXISTS(FREEZE)
   REPORT_NAME_DIGITAL(__LINE__, FREEZE_PIN)
 #endif
 #if PIN_EXISTS(LCD_BACKLIGHT)