🎨 Add MMU2 enabled() accessor

Marlin/src/feature/mmu/mmu2.cpp

 #define MMU2_NO_TOOL 99
 #define MMU_BAUD    115200
 
-bool MMU2::enabled, MMU2::ready, MMU2::mmu_print_saved;
+bool MMU2::_enabled, MMU2::ready, MMU2::mmu_print_saved;
 #if HAS_PRUSA_MMU2S
   bool MMU2::mmu2s_triggered;
 #endif
 
         DEBUG_ECHOLNPAIR("MMU => ", finda, "\nMMU - ENABLED");
 
-        enabled = true;
+        _enabled = true;
         state = 1;
         TERN_(HAS_PRUSA_MMU2S, mmu2s_triggered = false);
       }
    */
   void MMU2::tool_change(const uint8_t index) {
 
-    if (!enabled) return;
+    if (!_enabled) return;
 
     set_runout_valid(false);
 
    * Tc Load to nozzle after filament was prepared by Tx and extruder nozzle is already heated.
    */
   void MMU2::tool_change(const char *special) {
-      if (!enabled) return;
+      if (!_enabled) return;
 
       set_runout_valid(false);
 
    * Handle tool change
    */
   void MMU2::tool_change(const uint8_t index) {
-    if (!enabled) return;
+    if (!_enabled) return;
 
     set_runout_valid(false);
 
    * Tc Load to nozzle after filament was prepared by Tx and extruder nozzle is already heated.
    */
   void MMU2::tool_change(const char *special) {
-    if (!enabled) return;
+    if (!_enabled) return;
 
     set_runout_valid(false);
 
    * Handle tool change
    */
   void MMU2::tool_change(const uint8_t index) {
-    if (!enabled) return;
+    if (!_enabled) return;
 
     set_runout_valid(false);
 
    * Tc Load to nozzle after filament was prepared by Tx and extruder nozzle is already heated.
    */
   void MMU2::tool_change(const char *special) {
-    if (!enabled) return;
+    if (!_enabled) return;
 
     set_runout_valid(false);
 
  * Set next command
  */
 void MMU2::command(const uint8_t mmu_cmd) {
-  if (!enabled) return;
+  if (!_enabled) return;
   cmd = mmu_cmd;
   ready = false;
 }
 }
 
 void MMU2::set_filament_type(const uint8_t index, const uint8_t filamentType) {
-  if (!enabled) return;
+  if (!_enabled) return;
 
   cmd_arg = filamentType;
   command(MMU_CMD_F0 + index);
 
 // Load filament into MMU2
 void MMU2::load_filament(const uint8_t index) {
-  if (!enabled) return;
+  if (!_enabled) return;
 
   command(MMU_CMD_L0 + index);
   manage_response(false, false);
  */
 bool MMU2::load_filament_to_nozzle(const uint8_t index) {
 
-  if (!enabled) return false;
+  if (!_enabled) return false;
 
   if (thermalManager.tooColdToExtrude(active_extruder)) {
     BUZZ(200, 404);
 
 bool MMU2::eject_filament(const uint8_t index, const bool recover) {
 
-  if (!enabled) return false;
+  if (!_enabled) return false;
 
   if (thermalManager.tooColdToExtrude(active_extruder)) {
     BUZZ(200, 404);
  */
 bool MMU2::unload() {
 
-  if (!enabled) return false;
+  if (!_enabled) return false;
 
   if (thermalManager.tooColdToExtrude(active_extruder)) {
     BUZZ(200, 404);

Marlin/src/feature/mmu/mmu2.h

 
   static void init();
   static void reset();
+  static inline bool enabled() { return _enabled; }
   static void mmu_loop();
   static void tool_change(const uint8_t index);
   static void tool_change(const char *special);
     static void mmu_continue_loading();
   #endif
 
-  static bool enabled, ready, mmu_print_saved;
+  static bool _enabled, ready, mmu_print_saved;
 
   static uint8_t cmd, cmd_arg, last_cmd, extruder;
   static int8_t state;

Marlin/src/pins/stm32f1/pins_MKS_ROBIN_E3_common.h

     #define DOGLCD_SCK                      PB13
     #define FORCE_SOFT_SPI
     #define SOFTWARE_SPI
-    
+
   #else
 
     #define LCD_PINS_D4                     PA6