SMUFF (MMU2 clone) support (#19912)

Marlin/Configuration.h

@@ -158,33 +158,19 @@
 #endif
 
 /**
- * Průša MK2 Single Nozzle Multi-Material Multiplexer, and variants.
- *
- * This device allows one stepper driver on a control board to drive
- * two to eight stepper motors, one at a time, in a manner suitable
- * for extruders.
- *
- * This option only allows the multiplexer to switch on tool-change.
- * Additional options to configure custom E moves are pending.
- */
-//#define MK2_MULTIPLEXER
-#if ENABLED(MK2_MULTIPLEXER)
-  // Override the default DIO selector pins here, if needed.
-  // Some pins files may provide defaults for these pins.
-  //#define E_MUX0_PIN 40  // Always Required
-  //#define E_MUX1_PIN 42  // Needed for 3 to 8 inputs
-  //#define E_MUX2_PIN 44  // Needed for 5 to 8 inputs
-#endif
-
-/**
- * Průša Multi-Material Unit v2
+ * Multi-Material Unit
+ * Set to one of these predefined models:
  *
- * Requires NOZZLE_PARK_FEATURE to park print head in case MMU unit fails.
- * Requires EXTRUDERS = 5
+ *   PRUSA_MMU1      : Průša MMU1 (The "multiplexer" version)
+ *   PRUSA_MMU2      : Průša MMU2
+ *   PRUSA_MMU2S     : Průša MMU2S (Requires MK3S extruder with motion sensor, EXTRUDERS = 5)
+ *   SMUFF_EMU_MMU2  : Technik Gegg SMUFF (Průša MMU2 emulation mode)
+ *   SMUFF_EMU_MMU2S : Technik Gegg SMUFF (Průša MMU2S emulation mode)
  *
- * For additional configuration see Configuration_adv.h
+ * Requires NOZZLE_PARK_FEATURE to park print head in case MMU unit fails.
+ * See additional options in Configuration_adv.h.
  */
-//#define PRUSA_MMU2
+//#define MMU_MODEL PRUSA_MMU2
 
 // A dual extruder that uses a single stepper motor
 //#define SWITCHING_EXTRUDER

Marlin/Configuration_adv.h

@@ -3532,11 +3532,24 @@
 #endif
 
 /**
- * Průša Multi-Material Unit v2
+ * Průša Multi-Material Unit (MMU)
  * Enable in Configuration.h
+ *
+ * These devices allow a single stepper driver on the board to drive
+ * multi-material feeders with any number of stepper motors.
  */
-#if ENABLED(PRUSA_MMU2)
-
+#if HAS_PRUSA_MMU1
+  /**
+   * This option only allows the multiplexer to switch on tool-change.
+   * Additional options to configure custom E moves are pending.
+   *
+   * Override the default DIO selector pins here, if needed.
+   * Some pins files may provide defaults for these pins.
+   */
+  //#define E_MUX0_PIN 40  // Always Required
+  //#define E_MUX1_PIN 42  // Needed for 3 to 8 inputs
+  //#define E_MUX2_PIN 44  // Needed for 5 to 8 inputs
+#elif HAS_PRUSA_MMU2
   // Serial port used for communication with MMU2.
   // For AVR enable the UART port used for the MMU. (e.g., mmuSerial)
   // For 32-bit boards check your HAL for available serial ports. (e.g., Serial2)
@@ -3554,7 +3567,7 @@
 
   // Add an LCD menu for MMU2
   //#define MMU2_MENUS
-  #if ENABLED(MMU2_MENUS)
+  #if EITHER(MMU2_MENUS, HAS_PRUSA_MMU2S)
     // Settings for filament load / unload from the LCD menu.
     // This is for Průša MK3-style extruders. Customize for your hardware.
     #define MMU2_FILAMENTCHANGE_EJECT_FEED 80.0
@@ -3580,28 +3593,11 @@
   #endif
 
   /**
-   * MMU Extruder Sensor
-   *
-   * Support for a Průša (or other) IR Sensor to detect filament near the extruder
-   * and make loading more reliable. Suitable for an extruder equipped with a filament
-   * sensor less than 38mm from the gears.
-   *
-   * During loading the extruder will stop when the sensor is triggered, then do a last
-   * move up to the gears. If no filament is detected, the MMU2 can make some more attempts.
-   * If all attempts fail, a filament runout will be triggered.
-   */
-  //#define MMU_EXTRUDER_SENSOR
-  #if ENABLED(MMU_EXTRUDER_SENSOR)
-    #define MMU_LOADING_ATTEMPTS_NR 5 // max. number of attempts to load filament if first load fail
-  #endif
-
-  /**
    * Using a sensor like the MMU2S
    * This mode requires a MK3S extruder with a sensor at the extruder idler, like the MMU2S.
    * See https://help.prusa3d.com/en/guide/3b-mk3s-mk2-5s-extruder-upgrade_41560, step 11
    */
-  //#define PRUSA_MMU2_S_MODE
-  #if ENABLED(PRUSA_MMU2_S_MODE)
+  #if HAS_PRUSA_MMU2S
     #define MMU2_C0_RETRY   5             // Number of retries (total time = timeout*retries)
 
     #define MMU2_CAN_LOAD_FEEDRATE 800    // (mm/min)
@@ -3617,11 +3613,29 @@
     #define MMU2_CAN_LOAD_INCREMENT_SEQUENCE \
       { -MMU2_CAN_LOAD_INCREMENT, MMU2_CAN_LOAD_FEEDRATE }
 
+  #else
+
+    /**
+     * MMU1 Extruder Sensor
+     *
+     * Support for a Průša (or other) IR Sensor to detect filament near the extruder
+     * and make loading more reliable. Suitable for an extruder equipped with a filament
+     * sensor less than 38mm from the gears.
+     *
+     * During loading the extruder will stop when the sensor is triggered, then do a last
+     * move up to the gears. If no filament is detected, the MMU2 can make some more attempts.
+     * If all attempts fail, a filament runout will be triggered.
+     */
+    //#define MMU_EXTRUDER_SENSOR
+    #if ENABLED(MMU_EXTRUDER_SENSOR)
+      #define MMU_LOADING_ATTEMPTS_NR 5 // max. number of attempts to load filament if first load fail
+    #endif
+
   #endif
 
   //#define MMU2_DEBUG  // Write debug info to serial output
 
-#endif // PRUSA_MMU2
+#endif // HAS_PRUSA_MMU2
 
 /**
  * Advanced Print Counter settings

Marlin/src/HAL/LPC1768/inc/SanityCheck.h

@@ -97,8 +97,8 @@ static_assert(DISABLED(BAUD_RATE_GCODE), "BAUD_RATE_GCODE is not yet supported o
   #define IS_RX0(P) (P == P0_03)
   #if IS_TX0(TMC_SW_MISO) || IS_RX0(TMC_SW_MOSI)
     #error "Serial port pins (0) conflict with Trinamic SPI pins!"
-  #elif ENABLED(MK2_MULTIPLEXER) && (IS_TX0(E_MUX1_PIN) || IS_RX0(E_MUX0_PIN))
-    #error "Serial port pins (0) conflict with MK2 multiplexer pins!"
+  #elif HAS_PRUSA_MMU1 && (IS_TX0(E_MUX1_PIN) || IS_RX0(E_MUX0_PIN))
+    #error "Serial port pins (0) conflict with Multi-Material-Unit multiplexer pins!"
   #elif (AXIS_HAS_SPI(X) && IS_TX0(X_CS_PIN)) || (AXIS_HAS_SPI(Y) && IS_RX0(Y_CS_PIN))
     #error "Serial port pins (0) conflict with X/Y axis SPI pins!"
   #endif

Marlin/src/MarlinCore.cpp

@@ -213,8 +213,8 @@
   #include "feature/controllerfan.h"
 #endif
 
-#if ENABLED(PRUSA_MMU2)
-  #include "feature/mmu2/mmu2.h"
+#if HAS_PRUSA_MMU2
+  #include "feature/mmu/mmu2.h"
 #endif
 
 #if HAS_L64XX
@@ -713,9 +713,7 @@ void idle(TERN_(ADVANCED_PAUSE_FEATURE, bool no_stepper_sleep/*=false*/)) {
   TERN_(HAS_FILAMENT_SENSOR, runout.run());
 
   // Run HAL idle tasks
-  #ifdef HAL_IDLETASK
-    HAL_idletask();
-  #endif
+  TERN_(HAL_IDLETASK, HAL_idletask());
 
   // Check network connection
   TERN_(HAS_ETHERNET, ethernet.check());
@@ -772,7 +770,7 @@ void idle(TERN_(ADVANCED_PAUSE_FEATURE, bool no_stepper_sleep/*=false*/)) {
   #endif
 
   // Update the Průša MMU2
-  TERN_(PRUSA_MMU2, mmu2.mmu_loop());
+  TERN_(HAS_PRUSA_MMU2, mmu2.mmu_loop());
 
   // Handle Joystick jogging
   TERN_(POLL_JOG, joystick.inject_jog_moves());
@@ -780,9 +778,8 @@ void idle(TERN_(ADVANCED_PAUSE_FEATURE, bool no_stepper_sleep/*=false*/)) {
   // Direct Stepping
   TERN_(DIRECT_STEPPING, page_manager.write_responses());
 
-  #if HAS_TFT_LVGL_UI
-    LV_TASK_HANDLER();
-  #endif
+  // Update the LVGL interface
+  TERN_(HAS_TFT_LVGL_UI, LV_TASK_HANDLER());
 }
 
 /**
@@ -1187,8 +1184,8 @@ void setup() {
     SETUP_RUN(caselight.update_brightness());
   #endif
 
-  #if ENABLED(MK2_MULTIPLEXER)
-    SETUP_LOG("MK2_MULTIPLEXER");
+  #if HAS_PRUSA_MMU1
+    SETUP_LOG("Prusa MMU1");
     SET_OUTPUT(E_MUX0_PIN);
     SET_OUTPUT(E_MUX1_PIN);
     SET_OUTPUT(E_MUX2_PIN);
@@ -1268,7 +1265,7 @@ void setup() {
     SETUP_RUN(test_tmc_connection(true, true, true, true));
   #endif
 
-  #if ENABLED(PRUSA_MMU2)
+  #if HAS_PRUSA_MMU2
     SETUP_RUN(mmu2.init());
   #endif
 

Marlin/src/feature/snmm.cpp → Marlin/src/feature/mmu/mmu.cpp

@@ -22,7 +22,7 @@
 
 #include "../inc/MarlinConfig.h"
 
-#if ENABLED(MK2_MULTIPLEXER)
+#if HAS_PRUSA_MMU1
 
 #include "../module/stepper.h"
 
@@ -35,4 +35,4 @@ void select_multiplexed_stepper(const uint8_t e) {
   safe_delay(100);
 }
 
-#endif // MK2_MULTIPLEXER
+#endif // HAS_PRUSA_MMU1

Marlin/src/feature/mmu2/mmu2.cpp → Marlin/src/feature/mmu/mmu2.cpp

@@ -22,7 +22,7 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if ENABLED(PRUSA_MMU2)
+#if HAS_PRUSA_MMU2
 
 #include "mmu2.h"
 #include "../../lcd/menu/menu_mmu2.h"
@@ -94,7 +94,7 @@ MMU2 mmu2;
 #define mmuSerial   MMU2_SERIAL
 
 bool MMU2::enabled, MMU2::ready, MMU2::mmu_print_saved;
-#if ENABLED(PRUSA_MMU2_S_MODE)
+#if HAS_PRUSA_MMU2S
   bool MMU2::mmu2s_triggered;
 #endif
 uint8_t MMU2::cmd, MMU2::cmd_arg, MMU2::last_cmd, MMU2::extruder;
@@ -105,23 +105,19 @@ int16_t MMU2::version = -1, MMU2::buildnr = -1;
 millis_t MMU2::prev_request, MMU2::prev_P0_request;
 char MMU2::rx_buffer[MMU_RX_SIZE], MMU2::tx_buffer[MMU_TX_SIZE];
 
-#if BOTH(HAS_LCD_MENU, MMU2_MENUS)
-
-  struct E_Step {
-    float extrude;        //!< extrude distance in mm
-    feedRate_t feedRate;  //!< feed rate in mm/s
-  };
-
-  static constexpr E_Step
-      ramming_sequence[] PROGMEM = { MMU2_RAMMING_SEQUENCE }
-    , load_to_nozzle_sequence[] PROGMEM = { MMU2_LOAD_TO_NOZZLE_SEQUENCE }
-    #if ENABLED(PRUSA_MMU2_S_MODE)
-      , can_load_sequence[] PROGMEM = { MMU2_CAN_LOAD_SEQUENCE }
-      , can_load_increment_sequence[] PROGMEM = { MMU2_CAN_LOAD_INCREMENT_SEQUENCE }
-    #endif
-  ;
-
-#endif // MMU2_MENUS
+struct E_Step {
+  float extrude;        //!< extrude distance in mm
+  feedRate_t feedRate;  //!< feed rate in mm/s
+};
+
+static constexpr E_Step
+    ramming_sequence[] PROGMEM = { MMU2_RAMMING_SEQUENCE }
+  , load_to_nozzle_sequence[] PROGMEM = { MMU2_LOAD_TO_NOZZLE_SEQUENCE }
+  #if HAS_PRUSA_MMU2S
+    , can_load_sequence[] PROGMEM = { MMU2_CAN_LOAD_SEQUENCE }
+    , can_load_increment_sequence[] PROGMEM = { MMU2_CAN_LOAD_INCREMENT_SEQUENCE }
+  #endif
+;
 
 MMU2::MMU2() {
   rx_buffer[0] = '\0';
@@ -162,7 +158,7 @@ uint8_t MMU2::get_current_tool() {
   return extruder == MMU2_NO_TOOL ? -1 : extruder;
 }
 
-#if EITHER(PRUSA_MMU2_S_MODE, MMU_EXTRUDER_SENSOR)
+#if EITHER(HAS_PRUSA_MMU2S, MMU_EXTRUDER_SENSOR)
   #define FILAMENT_PRESENT() (READ(FIL_RUNOUT1_PIN) != FIL_RUNOUT1_STATE)
 #endif
 
@@ -188,7 +184,7 @@ void MMU2::mmu_loop() {
 
     case -2:
       if (rx_ok()) {
-        sscanf(rx_buffer, "%uok\n", &version);
+        sscanf(rx_buffer, "%huok\n", &version);
 
         DEBUG_ECHOLNPAIR("MMU => ", version, "\nMMU <= 'S2'");
 
@@ -199,7 +195,7 @@ void MMU2::mmu_loop() {
 
     case -3:
       if (rx_ok()) {
-        sscanf(rx_buffer, "%uok\n", &buildnr);
+        sscanf(rx_buffer, "%huok\n", &buildnr);
 
         DEBUG_ECHOLNPAIR("MMU => ", buildnr);
 
@@ -242,7 +238,7 @@ void MMU2::mmu_loop() {
 
         enabled = true;
         state = 1;
-        TERN_(PRUSA_MMU2_S_MODE, mmu2s_triggered = false);
+        TERN_(HAS_PRUSA_MMU2S, mmu2s_triggered = false);
       }
       break;
 
@@ -307,7 +303,7 @@ void MMU2::mmu_loop() {
         state = 2; // wait for response
       }
 
-      TERN_(PRUSA_MMU2_S_MODE, check_filament());
+      TERN_(HAS_PRUSA_MMU2S, check_filament());
       break;
 
     case 2:   // response to command P0
@@ -324,7 +320,7 @@ void MMU2::mmu_loop() {
       else if (ELAPSED(millis(), prev_request + MMU_P0_TIMEOUT)) // Resend request after timeout (3s)
         state = 1;
 
-      TERN_(PRUSA_MMU2_S_MODE, check_filament());
+      TERN_(HAS_PRUSA_MMU2S, check_filament());
       break;
 
     case 3:   // response to mmu commands
@@ -340,9 +336,9 @@ void MMU2::mmu_loop() {
       #endif
 
       if (rx_ok()) {
-        // Response to C0 mmu command in PRUSA_MMU2_S_MODE
+        // Response to C0 mmu command in MMU2S model
         bool can_reset = true;
-        #if ENABLED(PRUSA_MMU2_S_MODE)
+        #if HAS_PRUSA_MMU2S
           if (!mmu2s_triggered && last_cmd == MMU_CMD_C0) {
             can_reset = false;
             // MMU ok received but filament sensor not triggered, retrying...
@@ -367,7 +363,7 @@ void MMU2::mmu_loop() {
         }
         state = 1;
       }
-      TERN_(PRUSA_MMU2_S_MODE, check_filament());
+      TERN_(HAS_PRUSA_MMU2S, check_filament());
       break;
   }
 }
@@ -487,7 +483,7 @@ static void mmu2_not_responding() {
   BUZZ(100, 659);
 }
 
-#if ENABLED(PRUSA_MMU2_S_MODE)
+#if HAS_PRUSA_MMU2S
 
   bool MMU2::load_to_gears() {
     command(MMU_CMD_C0);
@@ -541,33 +537,38 @@ static void mmu2_not_responding() {
    * 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(MMU2_MENUS)
+      if (!enabled) return;
 
       set_runout_valid(false);
 
       switch (*special) {
         case '?': {
-          uint8_t index = mmu2_choose_filament();
-          while (!thermalManager.wait_for_hotend(active_extruder, false)) safe_delay(100);
-          load_filament_to_nozzle(index);
+          #if ENABLED(MMU2_MENUS)
+            const uint8_t index = mmu2_choose_filament();
+            while (!thermalManager.wait_for_hotend(active_extruder, false)) safe_delay(100);
+            load_filament_to_nozzle(index);
+          #else
+            BUZZ(400, 40);
+          #endif
         } break;
 
         case 'x': {
-          planner.synchronize();
-          uint8_t index = mmu2_choose_filament();
-          DISABLE_AXIS_E0();
-          command(MMU_CMD_T0 + index);
-          manage_response(true, true);
-
-          if (load_to_gears()) {
-            mmu_loop();
-            ENABLE_AXIS_E0();
-            extruder = index;
-            active_extruder = 0;
-          }
+          #if ENABLED(MMU2_MENUS)
+            planner.synchronize();
+            const uint8_t index = mmu2_choose_filament();
+            DISABLE_AXIS_E0();
+            command(MMU_CMD_T0 + index);
+            manage_response(true, true);
+
+            if (load_to_gears()) {
+              mmu_loop();
+              ENABLE_AXIS_E0();
+              extruder = index;
+              active_extruder = 0;
+            }
+          #else
+            BUZZ(400, 40);
+          #endif
         } break;
 
         case 'c': {
@@ -577,8 +578,6 @@ static void mmu2_not_responding() {
       }
 
       set_runout_valid(true);
-
-    #endif // MMU2_MENUS
   }
 
 #elif ENABLED(MMU_EXTRUDER_SENSOR)
@@ -628,20 +627,23 @@ static void mmu2_not_responding() {
   void MMU2::tool_change(const char* special) {
     if (!enabled) return;
 
-    #if ENABLED(MMU2_MENUS)
-
-      set_runout_valid(false);
+    set_runout_valid(false);
 
-      switch (*special) {
-        case '?': {
-          DEBUG_ECHOLNPGM("case ?\n");
+    switch (*special) {
+      case '?': {
+        DEBUG_ECHOLNPGM("case ?\n");
+        #if ENABLED(MMU2_MENUS)
           uint8_t index = mmu2_choose_filament();
           while (!thermalManager.wait_for_hotend(active_extruder, false)) safe_delay(100);
           load_filament_to_nozzle(index);
-        } break;
+        #else
+          BUZZ(400, 40);
+        #endif
+      } break;
 
-        case 'x': {
-          DEBUG_ECHOLNPGM("case x\n");
+      case 'x': {
+        DEBUG_ECHOLNPGM("case x\n");
+        #if ENABLED(MMU2_MENUS)
           planner.synchronize();
           uint8_t index = mmu2_choose_filament();
           DISABLE_AXIS_E0();
@@ -654,18 +656,19 @@ static void mmu2_not_responding() {
           ENABLE_AXIS_E0();
           extruder = index;
           active_extruder = 0;
-        } break;
-
-        case 'c': {
-          DEBUG_ECHOLNPGM("case c\n");
-          while (!thermalManager.wait_for_hotend(active_extruder, false)) safe_delay(100);
-          execute_extruder_sequence((const E_Step *)load_to_nozzle_sequence, COUNT(load_to_nozzle_sequence));
-        } break;
-      }
+        #else
+          BUZZ(400, 40);
+        #endif
+      } break;
 
-      set_runout_valid(true);
+      case 'c': {
+        DEBUG_ECHOLNPGM("case c\n");
+        while (!thermalManager.wait_for_hotend(active_extruder, false)) safe_delay(100);
+        execute_extruder_sequence((const E_Step *)load_to_nozzle_sequence, COUNT(load_to_nozzle_sequence));
+      } break;
+    }
 
-    #endif // MMU2_MENUS
+    set_runout_valid(true);
   }
 
   void MMU2::mmu_continue_loading() {
@@ -682,68 +685,74 @@ static void mmu2_not_responding() {
     mmu_idl_sens = 0;
   }
 
-#elif DISABLED(MMU_EXTRUDER_SENSOR) && DISABLED(PRUSA_MMU2_S_MODE)
+#else // !HAS_PRUSA_MMU2S && !MMU_EXTRUDER_SENSOR
 
-/**
- * Handle tool change
- */
-void MMU2::tool_change(const uint8_t index) {
-  if (!enabled) return;
-
-  set_runout_valid(false);
+  /**
+   * Handle tool change
+   */
+  void MMU2::tool_change(const uint8_t index) {
+    if (!enabled) return;
 
-  if (index != extruder) {
-    DISABLE_AXIS_E0();
-    ui.status_printf_P(0, GET_TEXT(MSG_MMU2_LOADING_FILAMENT), int(index + 1));
-    command(MMU_CMD_T0 + index);
-    manage_response(true, true);
-    command(MMU_CMD_C0);
-    extruder = index; //filament change is finished
-    active_extruder = 0;
-    ENABLE_AXIS_E0();
-    SERIAL_ECHO_START();
-    SERIAL_ECHOLNPAIR(STR_ACTIVE_EXTRUDER, int(extruder));
-    ui.reset_status();
-  }
+    set_runout_valid(false);
 
-  set_runout_valid(true);
-}
+    if (index != extruder) {
+      DISABLE_AXIS_E0();
+      ui.status_printf_P(0, GET_TEXT(MSG_MMU2_LOADING_FILAMENT), int(index + 1));
+      command(MMU_CMD_T0 + index);
+      manage_response(true, true);
+      command(MMU_CMD_C0);
+      extruder = index; //filament change is finished
+      active_extruder = 0;
+      ENABLE_AXIS_E0();
+      SERIAL_ECHO_START();
+      SERIAL_ECHOLNPAIR(STR_ACTIVE_EXTRUDER, int(extruder));
+      ui.reset_status();
+    }
 
-/**
- * Handle special T?/Tx/Tc commands
- *
- * T? Gcode to extrude shouldn't have to follow, load to extruder wheels is done automatically
- * Tx Same as T?, except nozzle doesn't have to be preheated. Tc must be placed after extruder nozzle is preheated to finish filament load.
- * 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;
+    set_runout_valid(true);
+  }
 
-  #if ENABLED(MMU2_MENUS)
+  /**
+   * Handle special T?/Tx/Tc commands
+   *
+   * T? Gcode to extrude shouldn't have to follow, load to extruder wheels is done automatically
+   * Tx Same as T?, except nozzle doesn't have to be preheated. Tc must be placed after extruder nozzle is preheated to finish filament load.
+   * 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;
 
     set_runout_valid(false);
 
     switch (*special) {
       case '?': {
         DEBUG_ECHOLNPGM("case ?\n");
-        uint8_t index = mmu2_choose_filament();
-        while (!thermalManager.wait_for_hotend(active_extruder, false)) safe_delay(100);
-        load_filament_to_nozzle(index);
+        #if ENABLED(MMU2_MENUS)
+          uint8_t index = mmu2_choose_filament();
+          while (!thermalManager.wait_for_hotend(active_extruder, false)) safe_delay(100);
+          load_filament_to_nozzle(index);
+        #else
+          BUZZ(400, 40);
+        #endif
       } break;
 
       case 'x': {
         DEBUG_ECHOLNPGM("case x\n");
-        planner.synchronize();
-        uint8_t index = mmu2_choose_filament();
-        DISABLE_AXIS_E0();
-        command(MMU_CMD_T0 + index);
-        manage_response(true, true);
-        command(MMU_CMD_C0);
-        mmu_loop();
+        #if ENABLED(MMU2_MENUS)
+          planner.synchronize();
+          uint8_t index = mmu2_choose_filament();
+          DISABLE_AXIS_E0();
+          command(MMU_CMD_T0 + index);
+          manage_response(true, true);
+          command(MMU_CMD_C0);
+          mmu_loop();
 
-        ENABLE_AXIS_E0();
-        extruder = index;
-        active_extruder = 0;
+          ENABLE_AXIS_E0();
+          extruder = index;
+          active_extruder = 0;
+        #else
+          BUZZ(400, 40);
+        #endif
       } break;
 
       case 'c': {
@@ -754,11 +763,9 @@ void MMU2::tool_change(const char* special) {
     }
 
     set_runout_valid(true);
-
-  #endif
   }
 
-#endif // MMU_EXTRUDER_SENSOR
+#endif // HAS_PRUSA_MMU2S
 
 /**
  * Set next command
@@ -866,7 +873,7 @@ void MMU2::filament_runout() {
   planner.synchronize();
 }
 
-#if ENABLED(PRUSA_MMU2_S_MODE)
+#if HAS_PRUSA_MMU2S
 
   void MMU2::check_filament() {
     const bool present = FILAMENT_PRESENT();
@@ -907,162 +914,159 @@ void MMU2::filament_runout() {
     DEBUG_ECHOLNPGM(" succeeded.");
     return true;
   }
+
 #endif
 
-#if BOTH(HAS_LCD_MENU, MMU2_MENUS)
+// Load filament into MMU2
+void MMU2::load_filament(const uint8_t index) {
+  if (!enabled) return;
+  command(MMU_CMD_L0 + index);
+  manage_response(false, false);
+  BUZZ(200, 404);
+}
 
-  // Load filament into MMU2
-  void MMU2::load_filament(const uint8_t index) {
-    if (!enabled) return;
-    command(MMU_CMD_L0 + index);
-    manage_response(false, false);
+/**
+ * Switch material and load to nozzle
+ */
+bool MMU2::load_filament_to_nozzle(const uint8_t index) {
+
+  if (!enabled) return false;
+
+  if (thermalManager.tooColdToExtrude(active_extruder)) {
     BUZZ(200, 404);
+    LCD_ALERTMESSAGEPGM(MSG_HOTEND_TOO_COLD);
+    return false;
   }
 
-  /**
-   * Switch material and load to nozzle
-   */
-  bool MMU2::load_filament_to_nozzle(const uint8_t index) {
+  command(MMU_CMD_T0 + index);
+  manage_response(true, true);
 
-    if (!enabled) return false;
+  const bool success = load_to_gears();
+  if (success) {
+    mmu_loop();
+    extruder = index;
+    active_extruder = 0;
+    load_to_nozzle();
+    BUZZ(200, 404);
+  }
+  return success;
+}
 
-    if (thermalManager.tooColdToExtrude(active_extruder)) {
-      BUZZ(200, 404);
-      LCD_ALERTMESSAGEPGM(MSG_HOTEND_TOO_COLD);
-      return false;
-    }
+/**
+ * Load filament to nozzle of multimaterial printer
+ *
+ * This function is used only only after T? (user select filament) and M600 (change filament).
+ * It is not used after T0 .. T4 command (select filament), in such case, gcode is responsible for loading
+ * filament to nozzle.
+ */
+void MMU2::load_to_nozzle() {
+  if (!enabled) return;
+  execute_extruder_sequence((const E_Step *)load_to_nozzle_sequence, COUNT(load_to_nozzle_sequence));
+}
 
-    command(MMU_CMD_T0 + index);
-    manage_response(true, true);
+bool MMU2::eject_filament(const uint8_t index, const bool recover) {
 
-    const bool success = load_to_gears();
-    if (success) {
-      mmu_loop();
-      extruder = index;
-      active_extruder = 0;
-      load_to_nozzle();
-      BUZZ(200, 404);
-    }
-    return success;
-  }
+  if (!enabled) return false;
 
-  /**
-   * Load filament to nozzle of multimaterial printer
-   *
-   * This function is used only only after T? (user select filament) and M600 (change filament).
-   * It is not used after T0 .. T4 command (select filament), in such case, gcode is responsible for loading
-   * filament to nozzle.
-   */
-  void MMU2::load_to_nozzle() {
-    if (!enabled) return;
-    execute_extruder_sequence((const E_Step *)load_to_nozzle_sequence, COUNT(load_to_nozzle_sequence));
+  if (thermalManager.tooColdToExtrude(active_extruder)) {
+    BUZZ(200, 404);
+    LCD_ALERTMESSAGEPGM(MSG_HOTEND_TOO_COLD);
+    return false;
   }
 
-  bool MMU2::eject_filament(const uint8_t index, const bool recover) {
+  LCD_MESSAGEPGM(MSG_MMU2_EJECTING_FILAMENT);
 
-    if (!enabled) return false;
-
-    if (thermalManager.tooColdToExtrude(active_extruder)) {
-      BUZZ(200, 404);
-      LCD_ALERTMESSAGEPGM(MSG_HOTEND_TOO_COLD);
-      return false;
-    }
+  ENABLE_AXIS_E0();
+  current_position.e -= MMU2_FILAMENTCHANGE_EJECT_FEED;
+  line_to_current_position(MMM_TO_MMS(2500));
+  planner.synchronize();
+  command(MMU_CMD_E0 + index);
+  manage_response(false, false);
 
-    LCD_MESSAGEPGM(MSG_MMU2_EJECTING_FILAMENT);
+  if (recover)  {
+    LCD_MESSAGEPGM(MSG_MMU2_EJECT_RECOVER);
+    BUZZ(200, 404);
+    TERN_(HOST_PROMPT_SUPPORT, host_prompt_do(PROMPT_USER_CONTINUE, PSTR("MMU2 Eject Recover"), CONTINUE_STR));
+    TERN_(EXTENSIBLE_UI, ExtUI::onUserConfirmRequired_P(PSTR("MMU2 Eject Recover")));
+    wait_for_user_response();
+    BUZZ(200, 404);
+    BUZZ(200, 404);
 
-    ENABLE_AXIS_E0();
-    current_position.e -= MMU2_FILAMENTCHANGE_EJECT_FEED;
-    line_to_current_position(2500 / 60);
-    planner.synchronize();
-    command(MMU_CMD_E0 + index);
+    command(MMU_CMD_R0);
     manage_response(false, false);
+  }
 
-    if (recover)  {
-      LCD_MESSAGEPGM(MSG_MMU2_EJECT_RECOVER);
-      BUZZ(200, 404);
-      TERN_(HOST_PROMPT_SUPPORT, host_prompt_do(PROMPT_USER_CONTINUE, PSTR("MMU2 Eject Recover"), CONTINUE_STR));
-      TERN_(EXTENSIBLE_UI, ExtUI::onUserConfirmRequired_P(PSTR("MMU2 Eject Recover")));
-      wait_for_user_response();
-      BUZZ(200, 404);
-      BUZZ(200, 404);
-
-      command(MMU_CMD_R0);
-      manage_response(false, false);
-    }
-
-    ui.reset_status();
+  ui.reset_status();
 
-    // no active tool
-    extruder = MMU2_NO_TOOL;
+  // no active tool
+  extruder = MMU2_NO_TOOL;
 
-    set_runout_valid(false);
+  set_runout_valid(false);
 
-    BUZZ(200, 404);
+  BUZZ(200, 404);
 
-    DISABLE_AXIS_E0();
+  DISABLE_AXIS_E0();
 
-    return true;
-  }
+  return true;
+}
 
-  /**
-   * Unload from hotend and retract to MMU
-   */
-  bool MMU2::unload() {
+/**
+ * Unload from hotend and retract to MMU
+ */
+bool MMU2::unload() {
 
-    if (!enabled) return false;
+  if (!enabled) return false;
 
-    if (thermalManager.tooColdToExtrude(active_extruder)) {
-      BUZZ(200, 404);
-      LCD_ALERTMESSAGEPGM(MSG_HOTEND_TOO_COLD);
-      return false;
-    }
-
-    filament_ramming();
+  if (thermalManager.tooColdToExtrude(active_extruder)) {
+    BUZZ(200, 404);
+    LCD_ALERTMESSAGEPGM(MSG_HOTEND_TOO_COLD);
+    return false;
+  }
 
-    command(MMU_CMD_U0);
-    manage_response(false, true);
+  filament_ramming();
 
-    BUZZ(200, 404);
+  command(MMU_CMD_U0);
+  manage_response(false, true);
 
-    // no active tool
-    extruder = MMU2_NO_TOOL;
+  BUZZ(200, 404);
 
-    set_runout_valid(false);
+  // no active tool
+  extruder = MMU2_NO_TOOL;
 
-    return true;
-  }
+  set_runout_valid(false);
 
-  /**
-   * Unload sequence to optimize shape of the tip of the unloaded filament
-   */
-  void MMU2::filament_ramming() {
-    execute_extruder_sequence((const E_Step *)ramming_sequence, sizeof(ramming_sequence) / sizeof(E_Step));
-  }
+  return true;
+}
 
-  void MMU2::execute_extruder_sequence(const E_Step * sequence, int steps) {
+/**
+ * Unload sequence to optimize shape of the tip of the unloaded filament
+ */
+void MMU2::filament_ramming() {
+  execute_extruder_sequence((const E_Step *)ramming_sequence, sizeof(ramming_sequence) / sizeof(E_Step));
+}
 
-    planner.synchronize();
-    ENABLE_AXIS_E0();
+void MMU2::execute_extruder_sequence(const E_Step * sequence, int steps) {
 
-    const E_Step* step = sequence;
+  planner.synchronize();
+  ENABLE_AXIS_E0();
 
-    LOOP_L_N(i, steps) {
-      const float es = pgm_read_float(&(step->extrude));
-      const feedRate_t fr_mm_m = pgm_read_float(&(step->feedRate));
+  const E_Step* step = sequence;
 
-      DEBUG_ECHO_START();
-      DEBUG_ECHOLNPAIR("E step ", es, "/", fr_mm_m);
+  LOOP_L_N(i, steps) {
+    const float es = pgm_read_float(&(step->extrude));
+    const feedRate_t fr_mm_m = pgm_read_float(&(step->feedRate));
 
-      current_position.e += es;
-      line_to_current_position(MMM_TO_MMS(fr_mm_m));
-      planner.synchronize();
+    DEBUG_ECHO_START();
+    DEBUG_ECHOLNPAIR("E step ", es, "/", fr_mm_m);
 
-      step++;
-    }
+    current_position.e += es;
+    line_to_current_position(MMM_TO_MMS(fr_mm_m));
+    planner.synchronize();
 
-    DISABLE_AXIS_E0();
+    step++;
   }
 
-#endif // HAS_LCD_MENU && MMU2_MENUS
+  DISABLE_AXIS_E0();
+}
 
-#endif // PRUSA_MMU2
+#endif // HAS_PRUSA_MMU2

Marlin/src/feature/mmu2/mmu2.h → Marlin/src/feature/mmu/mmu2.h

@@ -49,13 +49,11 @@ public:
   static uint8_t get_current_tool();
   static void set_filament_type(const uint8_t index, const uint8_t type);
 
-  #if BOTH(HAS_LCD_MENU, MMU2_MENUS)
-    static bool unload();
-    static void load_filament(uint8_t);
-    static void load_all();
-    static bool load_filament_to_nozzle(const uint8_t index);
-    static bool eject_filament(const uint8_t index, const bool recover);
-  #endif
+  static bool unload();
+  static void load_filament(uint8_t);
+  static void load_all();
+  static bool load_filament_to_nozzle(const uint8_t index);
+  static bool eject_filament(const uint8_t index, const bool recover);
 
 private:
   static bool rx_str_P(const char* str);
@@ -72,15 +70,13 @@ private:
   static bool get_response();
   static void manage_response(const bool move_axes, const bool turn_off_nozzle);
 
-  #if BOTH(HAS_LCD_MENU, MMU2_MENUS)
-    static void load_to_nozzle();
-    static void filament_ramming();
-    static void execute_extruder_sequence(const E_Step * sequence, int steps);
-  #endif
+  static void load_to_nozzle();
+  static void filament_ramming();
+  static void execute_extruder_sequence(const E_Step * sequence, int steps);
 
   static void filament_runout();
 
-  #if ENABLED(PRUSA_MMU2_S_MODE)
+  #if HAS_PRUSA_MMU2S
     static bool mmu2s_triggered;
     static void check_filament();
     static bool can_load();

Marlin/src/gcode/config/M220.cpp

@@ -31,13 +31,13 @@
  *
  * Report the current speed percentage factor if no parameter is specified
  *
- * With PRUSA_MMU2...
+ * For MMU2 and MMU2S devices...
  *   B : Flag to back up the current factor
  *   R : Flag to restore the last-saved factor
  */
 void GcodeSuite::M220() {
 
-  #if ENABLED(PRUSA_MMU2)
+  #if HAS_PRUSA_MMU2
     static int16_t backup_feedrate_percentage = 100;
     if (parser.seen('B')) backup_feedrate_percentage = feedrate_percentage;
     if (parser.seen('R')) feedrate_percentage = backup_feedrate_percentage;

Marlin/src/gcode/control/T.cpp

@@ -27,8 +27,8 @@
   #include "../../module/motion.h"
 #endif
 
-#if ENABLED(PRUSA_MMU2)
-  #include "../../feature/mmu2/mmu2.h"
+#if HAS_PRUSA_MMU2
+  #include "../../feature/mmu/mmu2.h"
 #endif
 
 #define DEBUG_OUT ENABLED(DEBUG_LEVELING_FEATURE)
@@ -40,7 +40,7 @@
  *   F[units/min] Set the movement feedrate
  *   S1           Don't move the tool in XY after change
  *
- * For PRUSA_MMU2:
+ * For PRUSA_MMU2(S) and SMUFF_EMU_MMU2(S)
  *   T[n] Gcode to extrude at least 38.10 mm at feedrate 19.02 mm/s must follow immediately to load to extruder wheels.
  *   T?   Gcode to extrude shouldn't have to follow. Load to extruder wheels is done automatically.
  *   Tx   Same as T?, but nozzle doesn't have to be preheated. Tc requires a preheated nozzle to finish filament load.
@@ -54,7 +54,7 @@ void GcodeSuite::T(const int8_t tool_index) {
   // Count this command as movement / activity
   reset_stepper_timeout();
 
-  #if ENABLED(PRUSA_MMU2)
+  #if HAS_PRUSA_MMU2
     if (parser.string_arg) {
       mmu2.tool_change(parser.string_arg);   // Special commands T?/Tx/Tc
       return;

Marlin/src/gcode/feature/pause/M701_M702.cpp

@@ -38,8 +38,8 @@
   #include "../../../lcd/marlinui.h"
 #endif
 
-#if ENABLED(PRUSA_MMU2)
-  #include "../../../feature/mmu2/mmu2.h"
+#if HAS_PRUSA_MMU2
+  #include "../../../feature/mmu/mmu2.h"
 #endif
 
 #if ENABLED(MIXING_EXTRUDER)
@@ -86,7 +86,7 @@ void GcodeSuite::M701() {
   // Show initial "wait for load" message
   TERN_(HAS_LCD_MENU, lcd_pause_show_message(PAUSE_MESSAGE_LOAD, PAUSE_MODE_LOAD_FILAMENT, target_extruder));
 
-  #if HAS_MULTI_EXTRUDER && DISABLED(PRUSA_MMU2)
+  #if HAS_MULTI_EXTRUDER && (HAS_PRUSA_MMU1 || !HAS_MMU)
     // Change toolhead if specified
     uint8_t active_extruder_before_filament_change = active_extruder;
     if (active_extruder != target_extruder)
@@ -98,7 +98,7 @@ void GcodeSuite::M701() {
     do_blocking_move_to_z(_MIN(current_position.z + park_point.z, Z_MAX_POS), feedRate_t(NOZZLE_PARK_Z_FEEDRATE));
 
   // Load filament
-  #if ENABLED(PRUSA_MMU2)
+  #if HAS_PRUSA_MMU2
     mmu2.load_filament_to_nozzle(target_extruder);
   #else
     constexpr float     purge_length = ADVANCED_PAUSE_PURGE_LENGTH,
@@ -121,7 +121,7 @@ void GcodeSuite::M701() {
   if (park_point.z > 0)
     do_blocking_move_to_z(_MAX(current_position.z - park_point.z, 0), feedRate_t(NOZZLE_PARK_Z_FEEDRATE));
 
-  #if HAS_MULTI_EXTRUDER && DISABLED(PRUSA_MMU2)
+  #if HAS_MULTI_EXTRUDER && (HAS_PRUSA_MMU1 || !HAS_MMU)
     // Restore toolhead if it was changed
     if (active_extruder_before_filament_change != active_extruder)
       tool_change(active_extruder_before_filament_change, false);
@@ -186,7 +186,7 @@ void GcodeSuite::M702() {
   // Show initial "wait for unload" message
   TERN_(HAS_LCD_MENU, lcd_pause_show_message(PAUSE_MESSAGE_UNLOAD, PAUSE_MODE_UNLOAD_FILAMENT, target_extruder));
 
-  #if HAS_MULTI_EXTRUDER && DISABLED(PRUSA_MMU2)
+  #if HAS_MULTI_EXTRUDER && (HAS_PRUSA_MMU1 || !HAS_MMU)
     // Change toolhead if specified
     uint8_t active_extruder_before_filament_change = active_extruder;
     if (active_extruder != target_extruder)
@@ -198,7 +198,7 @@ void GcodeSuite::M702() {
     do_blocking_move_to_z(_MIN(current_position.z + park_point.z, Z_MAX_POS), feedRate_t(NOZZLE_PARK_Z_FEEDRATE));
 
   // Unload filament
-  #if ENABLED(PRUSA_MMU2)
+  #if HAS_PRUSA_MMU2
     mmu2.unload();
   #else
     #if BOTH(HAS_MULTI_EXTRUDER, FILAMENT_UNLOAD_ALL_EXTRUDERS)
@@ -227,7 +227,7 @@ void GcodeSuite::M702() {
   if (park_point.z > 0)
     do_blocking_move_to_z(_MAX(current_position.z - park_point.z, 0), feedRate_t(NOZZLE_PARK_Z_FEEDRATE));
 
-  #if HAS_MULTI_EXTRUDER && DISABLED(PRUSA_MMU2)
+  #if HAS_MULTI_EXTRUDER && (HAS_PRUSA_MMU1 || !HAS_MMU)
     // Restore toolhead if it was changed
     if (active_extruder_before_filament_change != active_extruder)
       tool_change(active_extruder_before_filament_change, false);

Marlin/src/gcode/feature/prusa_MMU2/M403.cpp

@@ -22,10 +22,10 @@
 
 #include "../../../inc/MarlinConfigPre.h"
 
-#if ENABLED(PRUSA_MMU2)
+#if HAS_PRUSA_MMU2
 
 #include "../../gcode.h"
-#include "../../../feature/mmu2/mmu2.h"
+#include "../../../feature/mmu/mmu2.h"
 
 /**
  * M403: Set filament type for MMU2
@@ -46,4 +46,4 @@ void GcodeSuite::M403() {
     SERIAL_ECHO_MSG("M403 - bad arguments.");
 }
 
-#endif // PRUSA_MMU2
+#endif // HAS_PRUSA_MMU2

Marlin/src/gcode/gcode.cpp

@@ -702,7 +702,7 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
         case 402: M402(); break;                                  // M402: Stow probe
       #endif
 
-      #if ENABLED(PRUSA_MMU2)
+      #if HAS_PRUSA_MMU2
         case 403: M403(); break;
       #endif
 

Marlin/src/gcode/gcode.h

@@ -181,7 +181,7 @@
  * M217 - Set filament swap parameters: "M217 S<length> P<feedrate> R<feedrate>". (Requires SINGLENOZZLE)
  * M218 - Set/get a tool offset: "M218 T<index> X<offset> Y<offset>". (Requires 2 or more extruders)
  * M220 - Set Feedrate Percentage: "M220 S<percent>" (i.e., "FR" on the LCD)
- *        Use "M220 B" to back up the Feedrate Percentage and "M220 R" to restore it. (Requires PRUSA_MMU2)
+ *        Use "M220 B" to back up the Feedrate Percentage and "M220 R" to restore it. (Requires an MMU_MODEL version 2 or 2S)
  * M221 - Set Flow Percentage: "M221 S<percent>"
  * M226 - Wait until a pin is in a given state: "M226 P<pin> S<state>" (Requires DIRECT_PIN_CONTROL)
  * M240 - Trigger a camera to take a photograph. (Requires PHOTO_GCODE)
@@ -735,7 +735,7 @@ private:
     static void M402();
   #endif
 
-  TERN_(PRUSA_MMU2, static void M403());
+  TERN_(HAS_PRUSA_MMU2, static void M403());
 
   #if ENABLED(FILAMENT_WIDTH_SENSOR)
     static void M404();

Marlin/src/gcode/parser.cpp

@@ -155,7 +155,7 @@ void GCodeParser::parse(char *p) {
       // Skip spaces to get the numeric part
       while (*p == ' ') p++;
 
-      #if ENABLED(PRUSA_MMU2)
+      #if HAS_PRUSA_MMU2
         if (letter == 'T') {
           // check for special MMU2 T?/Tx/Tc commands
           if (*p == '?' || *p == 'x' || *p == 'c') {

Marlin/src/inc/Conditionals_LCD.h

@@ -496,6 +496,36 @@
 #endif
 
 /**
+ *  Multi-Material-Unit supported models
+ */
+#define PRUSA_MMU1      1
+#define PRUSA_MMU2      2
+#define PRUSA_MMU2S     3
+#define SMUFF_EMU_MMU2  12
+#define SMUFF_EMU_MMU2S 13
+
+#ifdef MMU_MODEL
+  #define HAS_MMU 1
+  #if MMU_MODEL == PRUSA_MMU1
+    #define HAS_PRUSA_MMU1 1
+  #elif MMU_MODEL % 10 == PRUSA_MMU2
+    #define HAS_PRUSA_MMU2 1
+  #elif MMU_MODEL % 10 == PRUSA_MMU2S
+    #define HAS_PRUSA_MMU2 1
+    #define HAS_PRUSA_MMU2S 1
+  #endif
+  #if MMU_MODEL >= SMUFF_EMU_MMU2
+    #define HAS_SMUFF 1
+  #endif
+#endif
+
+#undef PRUSA_MMU1
+#undef PRUSA_MMU2
+#undef PRUSA_MMU2S
+#undef SMUFF_EMU_MMU2
+#undef SMUFF_EMU_MMU2S
+
+/**
  * Extruders have some combination of stepper motors and hotends
  * so we separate these concepts into the defines:
  *
@@ -512,8 +542,6 @@
   #undef SWITCHING_EXTRUDER
   #undef SWITCHING_NOZZLE
   #undef MIXING_EXTRUDER
-  #undef MK2_MULTIPLEXER
-  #undef PRUSA_MMU2
   #undef HOTEND_IDLE_TIMEOUT
 #elif EXTRUDERS > 1
   #define HAS_MULTI_EXTRUDER 1
@@ -539,17 +567,17 @@
 #elif ENABLED(SWITCHING_TOOLHEAD)
   #define E_STEPPERS      EXTRUDERS
   #define E_MANUAL        EXTRUDERS
-#elif ENABLED(PRUSA_MMU2)
+#elif HAS_PRUSA_MMU2
   #define E_STEPPERS 1
 #endif
 
-// No inactive extruders with MK2_MULTIPLEXER or SWITCHING_NOZZLE
-#if EITHER(MK2_MULTIPLEXER, SWITCHING_NOZZLE)
+// No inactive extruders with SWITCHING_NOZZLE or Průša MMU1
+#if ENABLED(SWITCHING_NOZZLE) || HAS_PRUSA_MMU1
   #undef DISABLE_INACTIVE_EXTRUDER
 #endif
 
-// Průša MK2 Multiplexer and MMU 2.0 force SINGLENOZZLE
-#if EITHER(MK2_MULTIPLEXER, PRUSA_MMU2)
+// Průša MMU1, MMU 2.0, MMUS 2.0 and SMUFF force SINGLENOZZLE
+#if HAS_MMU
   #define SINGLENOZZLE
 #endif
 

Marlin/src/inc/SanityCheck.h

@@ -804,7 +804,11 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
   #if !PIN_EXISTS(FIL_RUNOUT)
     #error "FILAMENT_RUNOUT_SENSOR requires FIL_RUNOUT_PIN."
   #elif NUM_RUNOUT_SENSORS > E_STEPPERS
-    #error "NUM_RUNOUT_SENSORS cannot exceed the number of E steppers."
+    #if HAS_PRUSA_MMU2
+      #error "NUM_RUNOUT_SENSORS must be 1 with MMU2 / MMU2S."
+    #else
+      #error "NUM_RUNOUT_SENSORS cannot exceed the number of E steppers."
+    #endif
   #elif NUM_RUNOUT_SENSORS >= 2 && !PIN_EXISTS(FIL_RUNOUT2)
     #error "FIL_RUNOUT2_PIN is required with NUM_RUNOUT_SENSORS >= 2."
   #elif NUM_RUNOUT_SENSORS >= 3 && !PIN_EXISTS(FIL_RUNOUT3)
@@ -868,6 +872,42 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
 #endif
 
 /**
+ * Sanity checking for all Průša MMU
+ */
+#ifdef SNMM
+  #error "SNMM is obsolete. Define MMU_MODEL as PRUSA_MMU1 instead."
+#elif ENABLED(MK2_MULTIPLEXER)
+  #error "MK2_MULTIPLEXER is obsolete. Define MMU_MODEL as PRUSA_MMU1 instead."
+#elif ENABLED(PRUSA_MMU2)
+  #error "PRUSA_MMU2 is obsolete. Define MMU_MODEL as PRUSA_MMU2 instead."
+#elif ENABLED(PRUSA_MMU2_S_MODE)
+  #error "PRUSA_MMU2_S_MODE is obsolete. Define MMU_MODEL as PRUSA_MMU2S instead."
+#endif
+
+/**
+ * Multi-Material-Unit 2 / SMUFF requirements
+ */
+#if HAS_PRUSA_MMU2
+  #if EXTRUDERS != 5
+    #undef SINGLENOZZLE
+    #error "PRUSA_MMU2(S) requires exactly 5 EXTRUDERS. Please update your Configuration."
+  #elif DISABLED(NOZZLE_PARK_FEATURE)
+    #error "PRUSA_MMU2(S) requires NOZZLE_PARK_FEATURE. Enable it to continue."
+  #elif HAS_PRUSA_MMU2S && DISABLED(FILAMENT_RUNOUT_SENSOR)
+    #error "PRUSA_MMU2S requires FILAMENT_RUNOUT_SENSOR. Enable it to continue."
+  #elif ENABLED(MMU_EXTRUDER_SENSOR) && DISABLED(FILAMENT_RUNOUT_SENSOR)
+    #error "MMU_EXTRUDER_SENSOR requires FILAMENT_RUNOUT_SENSOR. Enable it to continue."
+  #elif ENABLED(MMU_EXTRUDER_SENSOR) && !HAS_LCD_MENU
+    #error "MMU_EXTRUDER_SENSOR requires an LCD supporting MarlinUI to be enabled."
+  #elif DISABLED(ADVANCED_PAUSE_FEATURE)
+    static_assert(nullptr == strstr(MMU2_FILAMENT_RUNOUT_SCRIPT, "M600"), "ADVANCED_PAUSE_FEATURE is required to use M600 with PRUSA_MMU2(S) / SMUFF_EMU_MMU2(S).");
+  #endif
+#endif
+#if HAS_SMUFF && EXTRUDERS > 12
+  #error "Too many extruders for SMUFF_EMU_MMU2(S). (12 maximum)."
+#endif
+
+/**
  * Options only for EXTRUDERS > 1
  */
 #if HAS_MULTI_EXTRUDER
@@ -902,17 +942,14 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
     #error "TOOLCHANGE_ZRAISE required for EXTRUDERS > 1."
   #endif
 
-#elif ENABLED(MK2_MULTIPLEXER)
-  #error "MK2_MULTIPLEXER requires 2 or more EXTRUDERS."
+#elif HAS_PRUSA_MMU1 || HAS_SMUFF
+
+  #error "Multi-Material-Unit requires 2 or more EXTRUDERS."
+
 #elif ENABLED(SINGLENOZZLE)
+
   #error "SINGLENOZZLE requires 2 or more EXTRUDERS."
-#endif
 
-/**
- * Sanity checking for the Průša MK2 Multiplexer
- */
-#ifdef SNMM
-  #error "SNMM is now MK2_MULTIPLEXER."
 #endif
 
 /**
@@ -1870,48 +1907,46 @@ static_assert(hbm[Z_AXIS] >= 0, "HOMING_BUMP_MM.Z must be greater than or equal
 /**
  * Test Extruder Stepper Pins
  */
-#if DISABLED(MK2_MULTIPLEXER) // MK2_MULTIPLEXER uses E0 stepper only
-  #if E_STEPPERS
-    #if !(PINS_EXIST(E0_STEP, E0_DIR) && HAS_E0_ENABLE)
-      #error "E0_STEP_PIN, E0_DIR_PIN, or E0_ENABLE_PIN not defined for this board."
+#if E_STEPPERS
+  #if !(PINS_EXIST(E0_STEP, E0_DIR) && HAS_E0_ENABLE)
+    #error "E0_STEP_PIN, E0_DIR_PIN, or E0_ENABLE_PIN not defined for this board."
+  #endif
+  #if E_STEPPERS > 1
+    #if !(PINS_EXIST(E1_STEP, E1_DIR) && HAS_E1_ENABLE)
+      #error "E1_STEP_PIN, E1_DIR_PIN, or E1_ENABLE_PIN not defined for this board."
     #endif
-    #if E_STEPPERS > 1
-      #if !(PINS_EXIST(E1_STEP, E1_DIR) && HAS_E1_ENABLE)
-        #error "E1_STEP_PIN, E1_DIR_PIN, or E1_ENABLE_PIN not defined for this board."
+    #if E_STEPPERS > 2
+      #if !(PINS_EXIST(E2_STEP, E2_DIR) && HAS_E2_ENABLE)
+        #error "E2_STEP_PIN, E2_DIR_PIN, or E2_ENABLE_PIN not defined for this board."
       #endif
-      #if E_STEPPERS > 2
-        #if !(PINS_EXIST(E2_STEP, E2_DIR) && HAS_E2_ENABLE)
-          #error "E2_STEP_PIN, E2_DIR_PIN, or E2_ENABLE_PIN not defined for this board."
+      #if E_STEPPERS > 3
+        #if !(PINS_EXIST(E3_STEP, E3_DIR) && HAS_E3_ENABLE)
+          #error "E3_STEP_PIN, E3_DIR_PIN, or E3_ENABLE_PIN not defined for this board."
         #endif
-        #if E_STEPPERS > 3
-          #if !(PINS_EXIST(E3_STEP, E3_DIR) && HAS_E3_ENABLE)
-            #error "E3_STEP_PIN, E3_DIR_PIN, or E3_ENABLE_PIN not defined for this board."
+        #if E_STEPPERS > 4
+          #if !(PINS_EXIST(E4_STEP, E4_DIR) && HAS_E4_ENABLE)
+            #error "E4_STEP_PIN, E4_DIR_PIN, or E4_ENABLE_PIN not defined for this board."
           #endif
-          #if E_STEPPERS > 4
-            #if !(PINS_EXIST(E4_STEP, E4_DIR) && HAS_E4_ENABLE)
-              #error "E4_STEP_PIN, E4_DIR_PIN, or E4_ENABLE_PIN not defined for this board."
+          #if E_STEPPERS > 5
+            #if !(PINS_EXIST(E5_STEP, E5_DIR) && HAS_E5_ENABLE)
+              #error "E5_STEP_PIN, E5_DIR_PIN, or E5_ENABLE_PIN not defined for this board."
             #endif
-            #if E_STEPPERS > 5
-              #if !(PINS_EXIST(E5_STEP, E5_DIR) && HAS_E5_ENABLE)
-                #error "E5_STEP_PIN, E5_DIR_PIN, or E5_ENABLE_PIN not defined for this board."
+            #if E_STEPPERS > 6
+              #if !(PINS_EXIST(E6_STEP, E6_DIR) && HAS_E6_ENABLE)
+                #error "E6_STEP_PIN, E6_DIR_PIN, or E6_ENABLE_PIN not defined for this board."
               #endif
-              #if E_STEPPERS > 6
-                #if !(PINS_EXIST(E6_STEP, E6_DIR) && HAS_E6_ENABLE)
-                  #error "E6_STEP_PIN, E6_DIR_PIN, or E6_ENABLE_PIN not defined for this board."
+              #if E_STEPPERS > 7
+                #if !(PINS_EXIST(E7_STEP, E7_DIR) && HAS_E7_ENABLE)
+                  #error "E7_STEP_PIN, E7_DIR_PIN, or E7_ENABLE_PIN not defined for this board."
                 #endif
-                #if E_STEPPERS > 7
-                  #if !(PINS_EXIST(E7_STEP, E7_DIR) && HAS_E7_ENABLE)
-                    #error "E7_STEP_PIN, E7_DIR_PIN, or E7_ENABLE_PIN not defined for this board."
-                  #endif
-                #endif // E_STEPPERS > 7
-              #endif // E_STEPPERS > 6
-            #endif // E_STEPPERS > 5
-          #endif // E_STEPPERS > 4
-        #endif // E_STEPPERS > 3
-      #endif // E_STEPPERS > 2
-    #endif // E_STEPPERS > 1
-  #endif // E_STEPPERS
-#endif
+              #endif // E_STEPPERS > 7
+            #endif // E_STEPPERS > 6
+          #endif // E_STEPPERS > 5
+        #endif // E_STEPPERS > 4
+      #endif // E_STEPPERS > 3
+    #endif // E_STEPPERS > 2
+  #endif // E_STEPPERS > 1
+#endif // E_STEPPERS
 
 /**
  * Endstop Tests
@@ -2978,23 +3013,6 @@ static_assert(   _ARR_TEST(3,0) && _ARR_TEST(3,1) && _ARR_TEST(3,2)
 #endif
 
 /**
- * Průša MMU2 requirements
- */
-#if ENABLED(PRUSA_MMU2)
-  #if EXTRUDERS != 5
-    #error "PRUSA_MMU2 requires EXTRUDERS = 5."
-  #elif DISABLED(NOZZLE_PARK_FEATURE)
-    #error "PRUSA_MMU2 requires NOZZLE_PARK_FEATURE. Enable it to continue."
-  #elif EITHER(PRUSA_MMU2_S_MODE, MMU_EXTRUDER_SENSOR) && DISABLED(FILAMENT_RUNOUT_SENSOR)
-    #error "PRUSA_MMU2_S_MODE or MMU_EXTRUDER_SENSOR requires FILAMENT_RUNOUT_SENSOR. Enable it to continue."
-  #elif BOTH(PRUSA_MMU2_S_MODE, MMU_EXTRUDER_SENSOR)
-    #error "Enable only one of PRUSA_MMU2_S_MODE or MMU_EXTRUDER_SENSOR."
-  #elif DISABLED(ADVANCED_PAUSE_FEATURE)
-    static_assert(nullptr == strstr(MMU2_FILAMENT_RUNOUT_SCRIPT, "M600"), "ADVANCED_PAUSE_FEATURE is required to use M600 with PRUSA_MMU2.");
-  #endif
-#endif
-
-/**
  * Advanced PRINTCOUNTER settings
  */
 #if ENABLED(PRINTCOUNTER)

Marlin/src/lcd/menu/menu_main.cpp

@@ -46,7 +46,7 @@
   #define MACHINE_CAN_PAUSE 1
 #endif
 
-#if ENABLED(PRUSA_MMU2)
+#if ENABLED(MMU2_MENUS)
   #include "../../lcd/menu/menu_mmu2.h"
 #endif
 

Marlin/src/lcd/menu/menu_mmu2.cpp

@@ -24,13 +24,10 @@
 
 #if BOTH(HAS_LCD_MENU, MMU2_MENUS)
 
-#include "../../feature/mmu2/mmu2.h"
+#include "../../feature/mmu/mmu2.h"
 #include "menu_mmu2.h"
 #include "menu_item.h"
 
-uint8_t currentTool;
-bool mmuMenuWait;
-
 //
 // Load Filament
 //
@@ -123,9 +120,12 @@ void menu_mmu2() {
 // T* Choose Filament
 //
 
-inline void action_mmu2_choose(const uint8_t tool) {
-  currentTool = tool;
-  mmuMenuWait = false;
+uint8_t feeder_index;
+bool wait_for_mmu_menu;
+
+inline void action_mmu2_chosen(const uint8_t index) {
+  feeder_index = index;
+  wait_for_mmu_menu = false;
 }
 
 void menu_mmu2_choose_filament() {
@@ -133,7 +133,7 @@ void menu_mmu2_choose_filament() {
   #if LCD_HEIGHT > 2
     STATIC_ITEM(MSG_MMU2_CHOOSE_FILAMENT_HEADER, SS_DEFAULT|SS_INVERT);
   #endif
-  LOOP_L_N(i, 5) ACTION_ITEM_N(i, MSG_MMU2_FILAMENT_N, []{ action_mmu2_choose(MenuItemBase::itemIndex); });
+  LOOP_L_N(i, 5) ACTION_ITEM_N(i, MSG_MMU2_FILAMENT_N, []{ action_mmu2_chosen(MenuItemBase::itemIndex); });
   END_MENU();
 }
 
@@ -142,32 +142,32 @@ void menu_mmu2_choose_filament() {
 //
 
 void menu_mmu2_pause() {
-  currentTool = mmu2.get_current_tool();
+  feeder_index = mmu2.get_current_tool();
   START_MENU();
   #if LCD_HEIGHT > 2
     STATIC_ITEM(MSG_FILAMENT_CHANGE_HEADER, SS_DEFAULT|SS_INVERT);
   #endif
-  ACTION_ITEM(MSG_MMU2_RESUME, []{ mmuMenuWait = false; });
+  ACTION_ITEM(MSG_MMU2_RESUME, []{ wait_for_mmu_menu = false; });
   ACTION_ITEM(MSG_MMU2_UNLOAD_FILAMENT, []{ mmu2.unload(); });
-  ACTION_ITEM(MSG_MMU2_LOAD_FILAMENT, []{ mmu2.load_filament(currentTool); });
-  ACTION_ITEM(MSG_MMU2_LOAD_TO_NOZZLE, []{ mmu2.load_filament_to_nozzle(currentTool); });
+  ACTION_ITEM(MSG_MMU2_LOAD_FILAMENT, []{ mmu2.load_filament(feeder_index); });
+  ACTION_ITEM(MSG_MMU2_LOAD_TO_NOZZLE, []{ mmu2.load_filament_to_nozzle(feeder_index); });
   END_MENU();
 }
 
 void mmu2_M600() {
   ui.defer_status_screen();
   ui.goto_screen(menu_mmu2_pause);
-  mmuMenuWait = true;
-  while (mmuMenuWait) idle();
+  wait_for_mmu_menu = true;
+  while (wait_for_mmu_menu) idle();
 }
 
 uint8_t mmu2_choose_filament() {
   ui.defer_status_screen();
   ui.goto_screen(menu_mmu2_choose_filament);
-  mmuMenuWait = true;
-  while (mmuMenuWait) idle();
+  wait_for_mmu_menu = true;
+  while (wait_for_mmu_menu) idle();
   ui.return_to_status();
-  return currentTool;
+  return feeder_index;
 }
 
 #endif // HAS_LCD_MENU && MMU2_MENUS

Marlin/src/module/settings.cpp

@@ -1068,46 +1068,30 @@ void MarlinSettings::postprocess() {
         #if AXIS_IS_TMC(Z4)
           tmc_stepper_current.Z4 = stepperZ4.getMilliamps();
         #endif
-        #if MAX_EXTRUDERS
-          #if AXIS_IS_TMC(E0)
-            tmc_stepper_current.E0 = stepperE0.getMilliamps();
-          #endif
-          #if MAX_EXTRUDERS > 1
-            #if AXIS_IS_TMC(E1)
-              tmc_stepper_current.E1 = stepperE1.getMilliamps();
-            #endif
-            #if MAX_EXTRUDERS > 2
-              #if AXIS_IS_TMC(E2)
-                tmc_stepper_current.E2 = stepperE2.getMilliamps();
-              #endif
-              #if MAX_EXTRUDERS > 3
-                #if AXIS_IS_TMC(E3)
-                  tmc_stepper_current.E3 = stepperE3.getMilliamps();
-                #endif
-                #if MAX_EXTRUDERS > 4
-                  #if AXIS_IS_TMC(E4)
-                    tmc_stepper_current.E4 = stepperE4.getMilliamps();
-                  #endif
-                  #if MAX_EXTRUDERS > 5
-                    #if AXIS_IS_TMC(E5)
-                      tmc_stepper_current.E5 = stepperE5.getMilliamps();
-                    #endif
-                    #if MAX_EXTRUDERS > 6
-                      #if AXIS_IS_TMC(E6)
-                        tmc_stepper_current.E6 = stepperE6.getMilliamps();
-                      #endif
-                      #if MAX_EXTRUDERS > 7
-                        #if AXIS_IS_TMC(E7)
-                          tmc_stepper_current.E7 = stepperE7.getMilliamps();
-                        #endif
-                      #endif // MAX_EXTRUDERS > 7
-                    #endif // MAX_EXTRUDERS > 6
-                  #endif // MAX_EXTRUDERS > 5
-                #endif // MAX_EXTRUDERS > 4
-              #endif // MAX_EXTRUDERS > 3
-            #endif // MAX_EXTRUDERS > 2
-          #endif // MAX_EXTRUDERS > 1
-        #endif // MAX_EXTRUDERS
+        #if AXIS_IS_TMC(E0)
+          tmc_stepper_current.E0 = stepperE0.getMilliamps();
+        #endif
+        #if AXIS_IS_TMC(E1)
+          tmc_stepper_current.E1 = stepperE1.getMilliamps();
+        #endif
+        #if AXIS_IS_TMC(E2)
+          tmc_stepper_current.E2 = stepperE2.getMilliamps();
+        #endif
+        #if AXIS_IS_TMC(E3)
+          tmc_stepper_current.E3 = stepperE3.getMilliamps();
+        #endif
+        #if AXIS_IS_TMC(E4)
+          tmc_stepper_current.E4 = stepperE4.getMilliamps();
+        #endif
+        #if AXIS_IS_TMC(E5)
+          tmc_stepper_current.E5 = stepperE5.getMilliamps();
+        #endif
+        #if AXIS_IS_TMC(E6)
+          tmc_stepper_current.E6 = stepperE6.getMilliamps();
+        #endif
+        #if AXIS_IS_TMC(E7)
+          tmc_stepper_current.E7 = stepperE7.getMilliamps();
+        #endif
       #endif
       EEPROM_WRITE(tmc_stepper_current);
     }
@@ -1144,46 +1128,30 @@ void MarlinSettings::postprocess() {
         #if AXIS_HAS_STEALTHCHOP(Z4)
           tmc_hybrid_threshold.Z4 = stepperZ4.get_pwm_thrs();
         #endif
-        #if MAX_EXTRUDERS
-          #if AXIS_HAS_STEALTHCHOP(E0)
-            tmc_hybrid_threshold.E0 = stepperE0.get_pwm_thrs();
-          #endif
-          #if MAX_EXTRUDERS > 1
-            #if AXIS_HAS_STEALTHCHOP(E1)
-              tmc_hybrid_threshold.E1 = stepperE1.get_pwm_thrs();
-            #endif
-            #if MAX_EXTRUDERS > 2
-              #if AXIS_HAS_STEALTHCHOP(E2)
-                tmc_hybrid_threshold.E2 = stepperE2.get_pwm_thrs();
-              #endif
-              #if MAX_EXTRUDERS > 3
-                #if AXIS_HAS_STEALTHCHOP(E3)
-                  tmc_hybrid_threshold.E3 = stepperE3.get_pwm_thrs();
-                #endif
-                #if MAX_EXTRUDERS > 4
-                  #if AXIS_HAS_STEALTHCHOP(E4)
-                    tmc_hybrid_threshold.E4 = stepperE4.get_pwm_thrs();
-                  #endif
-                  #if MAX_EXTRUDERS > 5
-                    #if AXIS_HAS_STEALTHCHOP(E5)
-                      tmc_hybrid_threshold.E5 = stepperE5.get_pwm_thrs();
-                    #endif
-                    #if MAX_EXTRUDERS > 6
-                      #if AXIS_HAS_STEALTHCHOP(E6)
-                        tmc_hybrid_threshold.E6 = stepperE6.get_pwm_thrs();
-                      #endif
-                      #if MAX_EXTRUDERS > 7
-                        #if AXIS_HAS_STEALTHCHOP(E7)
-                          tmc_hybrid_threshold.E7 = stepperE7.get_pwm_thrs();
-                        #endif
-                      #endif // MAX_EXTRUDERS > 7
-                    #endif // MAX_EXTRUDERS > 6
-                  #endif // MAX_EXTRUDERS > 5
-                #endif // MAX_EXTRUDERS > 4
-              #endif // MAX_EXTRUDERS > 3
-            #endif // MAX_EXTRUDERS > 2
-          #endif // MAX_EXTRUDERS > 1
-        #endif // MAX_EXTRUDERS
+        #if AXIS_HAS_STEALTHCHOP(E0)
+          tmc_hybrid_threshold.E0 = stepperE0.get_pwm_thrs();
+        #endif
+        #if AXIS_HAS_STEALTHCHOP(E1)
+          tmc_hybrid_threshold.E1 = stepperE1.get_pwm_thrs();
+        #endif
+        #if AXIS_HAS_STEALTHCHOP(E2)
+          tmc_hybrid_threshold.E2 = stepperE2.get_pwm_thrs();
+        #endif
+        #if AXIS_HAS_STEALTHCHOP(E3)
+          tmc_hybrid_threshold.E3 = stepperE3.get_pwm_thrs();
+        #endif
+        #if AXIS_HAS_STEALTHCHOP(E4)
+          tmc_hybrid_threshold.E4 = stepperE4.get_pwm_thrs();
+        #endif
+        #if AXIS_HAS_STEALTHCHOP(E5)
+          tmc_hybrid_threshold.E5 = stepperE5.get_pwm_thrs();
+        #endif
+        #if AXIS_HAS_STEALTHCHOP(E6)
+          tmc_hybrid_threshold.E6 = stepperE6.get_pwm_thrs();
+        #endif
+        #if AXIS_HAS_STEALTHCHOP(E7)
+          tmc_hybrid_threshold.E7 = stepperE7.get_pwm_thrs();
+        #endif
       #else
         const tmc_hybrid_threshold_t tmc_hybrid_threshold = {
           .X  = 100, .Y  = 100, .Z  =   3,
@@ -1219,73 +1187,54 @@ void MarlinSettings::postprocess() {
     {
       _FIELD_TEST(tmc_stealth_enabled);
 
-      tmc_stealth_enabled_t tmc_stealth_enabled = { false, false, false, false, false, false, false, false, false, false, false, false, false };
-
-      #if HAS_STEALTHCHOP
-        #if AXIS_HAS_STEALTHCHOP(X)
-          tmc_stealth_enabled.X = stepperX.get_stored_stealthChop();
-        #endif
-        #if AXIS_HAS_STEALTHCHOP(Y)
-          tmc_stealth_enabled.Y = stepperY.get_stored_stealthChop();
-        #endif
-        #if AXIS_HAS_STEALTHCHOP(Z)
-          tmc_stealth_enabled.Z = stepperZ.get_stored_stealthChop();
-        #endif
-        #if AXIS_HAS_STEALTHCHOP(X2)
-          tmc_stealth_enabled.X2 = stepperX2.get_stored_stealthChop();
-        #endif
-        #if AXIS_HAS_STEALTHCHOP(Y2)
-          tmc_stealth_enabled.Y2 = stepperY2.get_stored_stealthChop();
-        #endif
-        #if AXIS_HAS_STEALTHCHOP(Z2)
-          tmc_stealth_enabled.Z2 = stepperZ2.get_stored_stealthChop();
-        #endif
-        #if AXIS_HAS_STEALTHCHOP(Z3)
-          tmc_stealth_enabled.Z3 = stepperZ3.get_stored_stealthChop();
-        #endif
-        #if AXIS_HAS_STEALTHCHOP(Z4)
-          tmc_stealth_enabled.Z4 = stepperZ4.get_stored_stealthChop();
-        #endif
-        #if MAX_EXTRUDERS
-          #if AXIS_HAS_STEALTHCHOP(E0)
-            tmc_stealth_enabled.E0 = stepperE0.get_stored_stealthChop();
-          #endif
-          #if MAX_EXTRUDERS > 1
-            #if AXIS_HAS_STEALTHCHOP(E1)
-              tmc_stealth_enabled.E1 = stepperE1.get_stored_stealthChop();
-            #endif
-            #if MAX_EXTRUDERS > 2
-              #if AXIS_HAS_STEALTHCHOP(E2)
-                tmc_stealth_enabled.E2 = stepperE2.get_stored_stealthChop();
-              #endif
-              #if MAX_EXTRUDERS > 3
-                #if AXIS_HAS_STEALTHCHOP(E3)
-                  tmc_stealth_enabled.E3 = stepperE3.get_stored_stealthChop();
-                #endif
-                #if MAX_EXTRUDERS > 4
-                  #if AXIS_HAS_STEALTHCHOP(E4)
-                    tmc_stealth_enabled.E4 = stepperE4.get_stored_stealthChop();
-                  #endif
-                  #if MAX_EXTRUDERS > 5
-                    #if AXIS_HAS_STEALTHCHOP(E5)
-                      tmc_stealth_enabled.E5 = stepperE5.get_stored_stealthChop();
-                    #endif
-                    #if MAX_EXTRUDERS > 6
-                      #if AXIS_HAS_STEALTHCHOP(E6)
-                        tmc_stealth_enabled.E6 = stepperE6.get_stored_stealthChop();
-                      #endif
-                      #if MAX_EXTRUDERS > 7
-                        #if AXIS_HAS_STEALTHCHOP(E7)
-                          tmc_stealth_enabled.E7 = stepperE7.get_stored_stealthChop();
-                        #endif
-                      #endif // MAX_EXTRUDERS > 7
-                    #endif // MAX_EXTRUDERS > 6
-                  #endif // MAX_EXTRUDERS > 5
-                #endif // MAX_EXTRUDERS > 4
-              #endif // MAX_EXTRUDERS > 3
-            #endif // MAX_EXTRUDERS > 2
-          #endif // MAX_EXTRUDERS > 1
-        #endif // MAX_EXTRUDERS
+      tmc_stealth_enabled_t tmc_stealth_enabled = { false };
+      #if AXIS_HAS_STEALTHCHOP(X)
+        tmc_stealth_enabled.X = stepperX.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(Y)
+        tmc_stealth_enabled.Y = stepperY.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(Z)
+        tmc_stealth_enabled.Z = stepperZ.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(X2)
+        tmc_stealth_enabled.X2 = stepperX2.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(Y2)
+        tmc_stealth_enabled.Y2 = stepperY2.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(Z2)
+        tmc_stealth_enabled.Z2 = stepperZ2.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(Z3)
+        tmc_stealth_enabled.Z3 = stepperZ3.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(Z4)
+        tmc_stealth_enabled.Z4 = stepperZ4.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(E0)
+        tmc_stealth_enabled.E0 = stepperE0.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(E1)
+        tmc_stealth_enabled.E1 = stepperE1.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(E2)
+        tmc_stealth_enabled.E2 = stepperE2.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(E3)
+        tmc_stealth_enabled.E3 = stepperE3.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(E4)
+        tmc_stealth_enabled.E4 = stepperE4.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(E5)
+        tmc_stealth_enabled.E5 = stepperE5.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(E6)
+        tmc_stealth_enabled.E6 = stepperE6.get_stored_stealthChop();
+      #endif
+      #if AXIS_HAS_STEALTHCHOP(E7)
+        tmc_stealth_enabled.E7 = stepperE7.get_stored_stealthChop();
       #endif
       EEPROM_WRITE(tmc_stealth_enabled);
     }

Marlin/src/module/stepper/indirection.h

@@ -417,12 +417,15 @@ void reset_stepper_drivers();    // Called by settings.load / settings.reset
     #define   NORM_E_DIR(E)   do{ E0_DIR_WRITE(E ?  INVERT_E0_DIR : !INVERT_E0_DIR); }while(0)
     #define    REV_E_DIR(E)   do{ E0_DIR_WRITE(E ? !INVERT_E0_DIR :  INVERT_E0_DIR); }while(0)
   #endif
-#elif ENABLED(PRUSA_MMU2)
+
+#elif HAS_PRUSA_MMU2
+
   #define E_STEP_WRITE(E,V) E0_STEP_WRITE(V)
   #define   NORM_E_DIR(E)   E0_DIR_WRITE(!INVERT_E0_DIR)
   #define    REV_E_DIR(E)   E0_DIR_WRITE( INVERT_E0_DIR)
 
-#elif ENABLED(MK2_MULTIPLEXER) // One multiplexed stepper driver, reversed on odd index
+#elif HAS_PRUSA_MMU1  // One multiplexed stepper driver, reversed on odd index
+
   #define E_STEP_WRITE(E,V) E0_STEP_WRITE(V)
   #define   NORM_E_DIR(E)   do{ E0_DIR_WRITE(TEST(E, 0) ? !INVERT_E0_DIR:  INVERT_E0_DIR); }while(0)
   #define    REV_E_DIR(E)   do{ E0_DIR_WRITE(TEST(E, 0) ?  INVERT_E0_DIR: !INVERT_E0_DIR); }while(0)

Marlin/src/module/tool_change.cpp

@@ -73,10 +73,6 @@
   #include "../feature/solenoid.h"
 #endif
 
-#if ENABLED(MK2_MULTIPLEXER)
-  #include "../feature/snmm.h"
-#endif
-
 #if ENABLED(MIXING_EXTRUDER)
   #include "../feature/mixing.h"
 #endif
@@ -89,8 +85,10 @@
   #include "../feature/fanmux.h"
 #endif
 
-#if ENABLED(PRUSA_MMU2)
-  #include "../feature/mmu2/mmu2.h"
+#if HAS_PRUSA_MMU1
+  #include "../feature/mmu/mmu.h"
+#elif HAS_PRUSA_MMU2
+  #include "../feature/mmu/mmu2.h"
 #endif
 
 #if HAS_LCD_MENU
@@ -863,7 +861,7 @@ void tool_change(const uint8_t new_tool, bool no_move/*=false*/) {
       mixer.T(new_tool);
     #endif
 
-  #elif ENABLED(PRUSA_MMU2)
+  #elif HAS_PRUSA_MMU2
 
     UNUSED(no_move);
 
@@ -1171,8 +1169,6 @@ void tool_change(const uint8_t new_tool, bool no_move/*=false*/) {
           do_blocking_move_to_z(destination.z, planner.settings.max_feedrate_mm_s[Z_AXIS]);
       #endif
 
-      TERN_(PRUSA_MMU2, mmu2.tool_change(new_tool));
-
       TERN_(SWITCHING_NOZZLE_TWO_SERVOS, lower_nozzle(new_tool));
 
     } // (new_tool != old_tool)
@@ -1184,7 +1180,7 @@ void tool_change(const uint8_t new_tool, bool no_move/*=false*/) {
       enable_solenoid_on_active_extruder();
     #endif
 
-    #if ENABLED(MK2_MULTIPLEXER)
+    #if HAS_PRUSA_MMU1
       if (new_tool >= E_STEPPERS) return invalid_extruder_error(new_tool);
       select_multiplexed_stepper(new_tool);
     #endif

Marlin/src/pins/lpc1768/pins_MKS_SBASE.h

@@ -131,9 +131,9 @@
 #define PIN_P2_11                          P2_11  // Interrupt Capable
 
 //
-// Průša i3 MK2 Multi Material Multiplexer Support
+// Průša i3 MMU1 (Multi Material Multiplexer) Support
 //
-#if ENABLED(MK2_MULTIPLEXER)
+#if HAS_PRUSA_MMU1
   #define E_MUX0_PIN                       P1_23  // J8-3
   #define E_MUX1_PIN                       P2_12  // J8-4
   #define E_MUX2_PIN                       P2_11  // J8-5

Marlin/src/pins/pins.h

@@ -35,7 +35,12 @@
  *    These numbers are the same in any pin mapping.
  */
 
-#define MAX_EXTRUDERS 8
+#if HAS_SMUFF
+  #define MAX_EXTRUDERS 12
+#else
+  #define MAX_EXTRUDERS 8
+#endif
+#define MAX_E_STEPPERS 8
 
 #if   MB(RAMPS_13_EFB, RAMPS_14_EFB, RAMPS_PLUS_EFB, RAMPS_14_RE_ARM_EFB, RAMPS_SMART_EFB, RAMPS_DUO_EFB, RAMPS4DUE_EFB)
   #define IS_RAMPS_EFB

Marlin/src/pins/pins_postprocess.h

@@ -521,7 +521,7 @@
     #define X2_STEP_PIN   _EPIN(X2_E_INDEX, STEP)
     #define X2_DIR_PIN    _EPIN(X2_E_INDEX, DIR)
     #define X2_ENABLE_PIN _EPIN(X2_E_INDEX, ENABLE)
-    #if X2_E_INDEX >= MAX_EXTRUDERS || !PIN_EXISTS(X2_STEP)
+    #if X2_E_INDEX >= MAX_E_STEPPERS || !PIN_EXISTS(X2_STEP)
       #error "No E stepper plug left for X2!"
     #endif
   #endif
@@ -594,7 +594,7 @@
     #define Y2_STEP_PIN   _EPIN(Y2_E_INDEX, STEP)
     #define Y2_DIR_PIN    _EPIN(Y2_E_INDEX, DIR)
     #define Y2_ENABLE_PIN _EPIN(Y2_E_INDEX, ENABLE)
-    #if Y2_E_INDEX >= MAX_EXTRUDERS || !PIN_EXISTS(Y2_STEP)
+    #if Y2_E_INDEX >= MAX_E_STEPPERS || !PIN_EXISTS(Y2_STEP)
       #error "No E stepper plug left for Y2!"
     #endif
   #endif
@@ -662,7 +662,7 @@
     #define Z2_STEP_PIN   _EPIN(Z2_E_INDEX, STEP)
     #define Z2_DIR_PIN    _EPIN(Z2_E_INDEX, DIR)
     #define Z2_ENABLE_PIN _EPIN(Z2_E_INDEX, ENABLE)
-    #if Z2_E_INDEX >= MAX_EXTRUDERS || !PIN_EXISTS(Z2_STEP)
+    #if Z2_E_INDEX >= MAX_E_STEPPERS || !PIN_EXISTS(Z2_STEP)
       #error "No E stepper plug left for Z2!"
     #endif
   #endif
@@ -729,7 +729,7 @@
     #define Z3_STEP_PIN   _EPIN(Z3_E_INDEX, STEP)
     #define Z3_DIR_PIN    _EPIN(Z3_E_INDEX, DIR)
     #define Z3_ENABLE_PIN _EPIN(Z3_E_INDEX, ENABLE)
-    #if Z3_E_INDEX >= MAX_EXTRUDERS || !PIN_EXISTS(Z3_STEP)
+    #if Z3_E_INDEX >= MAX_E_STEPPERS || !PIN_EXISTS(Z3_STEP)
       #error "No E stepper plug left for Z3!"
     #endif
   #endif
@@ -796,7 +796,7 @@
     #define Z4_STEP_PIN   _EPIN(Z4_E_INDEX, STEP)
     #define Z4_DIR_PIN    _EPIN(Z4_E_INDEX, DIR)
     #define Z4_ENABLE_PIN _EPIN(Z4_E_INDEX, ENABLE)
-    #if Z4_E_INDEX >= MAX_EXTRUDERS || !PIN_EXISTS(Z4_STEP)
+    #if Z4_E_INDEX >= MAX_E_STEPPERS || !PIN_EXISTS(Z4_STEP)
       #error "No E stepper plug left for Z4!"
     #endif
   #endif

Marlin/src/pins/stm32f4/pins_BTT_GTR_V1_0.h

@@ -25,8 +25,8 @@
   #error "Oops! Select an STM32F4 board in 'Tools > Board.'"
 #elif HOTENDS > 8 || E_STEPPERS > 8
   #error "BIGTREE GTR V1.0 supports up to 8 hotends / E-steppers."
-#elif HOTENDS > MAX_EXTRUDERS || E_STEPPERS > MAX_EXTRUDERS
-  #error "Marlin extruder/hotends limit! Increase MAX_EXTRUDERS to continue."
+#elif HOTENDS > MAX_E_STEPPERS || E_STEPPERS > MAX_E_STEPPERS
+  #error "Marlin extruder/hotends limit! Increase MAX_E_STEPPERS to continue."
 #endif
 
 #define BOARD_INFO_NAME "BTT GTR V1.0"

buildroot/tests/mega2560-tests

@@ -66,28 +66,38 @@ exec_test $1 $2 "Azteeg X3 Pro | EXTRUDERS 5 | RRDFGSC | UBL | LIN_ADVANCE | Sle
 #
 restore_configs
 opt_set LCD_LANGUAGE zh_CN
+opt_set MMU_MODEL PRUSA_MMU2S
 opt_set EXTRUDERS 5
 opt_set NUM_SERVOS 1
 opt_enable ZONESTAR_LCD Z_PROBE_SERVO_NR Z_SERVO_ANGLES DEACTIVATE_SERVOS_AFTER_MOVE BOOT_MARLIN_LOGO_ANIMATED \
            AUTO_BED_LEVELING_3POINT DEBUG_LEVELING_FEATURE EEPROM_SETTINGS EEPROM_CHITCHAT M114_DETAIL \
            NO_VOLUMETRICS EXTENDED_CAPABILITIES_REPORT AUTO_REPORT_TEMPERATURES AUTOTEMP G38_PROBE_TARGET JOYSTICK \
-           PRUSA_MMU2 MMU2_MENUS PRUSA_MMU2_S_MODE DIRECT_STEPPING DETECT_BROKEN_ENDSTOP \
+           MMU2_MENUS DIRECT_STEPPING DETECT_BROKEN_ENDSTOP \
            FILAMENT_RUNOUT_SENSOR NOZZLE_PARK_FEATURE ADVANCED_PAUSE_FEATURE Z_SAFE_HOMING
-exec_test $1 $2 "RAMPS | ZONESTAR + Chinese | MMU2 | Servo | 3-Point + Debug | G38 ..." "$3"
+exec_test $1 $2 "RAMPS | ZONESTAR + Chinese | MMU2S | Servo | 3-Point + Debug | G38 ..." "$3"
 
 #
 # 5 runout sensors with distinct states
 #
 restore_configs
+opt_set MOTHERBOARD BOARD_AZTEEG_X3_PRO
 opt_set EXTRUDERS 5
 opt_set NUM_SERVOS 1
+opt_set TEMP_SENSOR_1 1
+opt_set TEMP_SENSOR_2 1
+opt_set TEMP_SENSOR_3 1
+opt_set TEMP_SENSOR_4 1
 opt_enable ZONESTAR_LCD Z_PROBE_SERVO_NR Z_SERVO_ANGLES DEACTIVATE_SERVOS_AFTER_MOVE BOOT_MARLIN_LOGO_ANIMATED \
            AUTO_BED_LEVELING_3POINT DEBUG_LEVELING_FEATURE EEPROM_SETTINGS EEPROM_CHITCHAT M114_DETAIL \
            NO_VOLUMETRICS EXTENDED_CAPABILITIES_REPORT AUTO_REPORT_TEMPERATURES AUTOTEMP G38_PROBE_TARGET JOYSTICK \
-           PRUSA_MMU2 MMU2_MENUS PRUSA_MMU2_S_MODE DIRECT_STEPPING DETECT_BROKEN_ENDSTOP \
+           DIRECT_STEPPING DETECT_BROKEN_ENDSTOP \
            FILAMENT_RUNOUT_SENSOR NOZZLE_PARK_FEATURE ADVANCED_PAUSE_FEATURE Z_SAFE_HOMING FIL_RUNOUT3_PULL
-opt_set MIXING_STEPPERS 5
+opt_set NUM_RUNOUT_SENSORS 5
+opt_set FIL_RUNOUT2_PIN 44
+opt_set FIL_RUNOUT3_PIN 45
 opt_set FIL_RUNOUT3_STATE HIGH
+opt_set FIL_RUNOUT4_PIN 46
+opt_set FIL_RUNOUT5_PIN 47
 exec_test $1 $2 "Multiple runout sensors (x5) | Distinct runout states"
 
 #

platformio.ini

@@ -93,7 +93,8 @@ default_src_filter = +<src/*> -<src/config> -<src/HAL> +<src/HAL/shared>
   -<src/feature/leds/tempstat.cpp>
   -<src/feature/max7219.cpp>
   -<src/feature/mixing.cpp>
-  -<src/feature/mmu2> -<src/gcode/feature/prusa_MMU2>
+  -<src/feature/mmu/mmu.cpp>
+  -<src/feature/mmu/mmu2.cpp> -<src/gcode/feature/prusa_MMU2>
   -<src/feature/password> -<src/gcode/feature/password>
   -<src/feature/pause.cpp>
   -<src/feature/power.cpp>
@@ -101,7 +102,6 @@ default_src_filter = +<src/*> -<src/config> -<src/HAL> +<src/HAL/shared>
   -<src/feature/powerloss.cpp> -<src/gcode/feature/powerloss>
   -<src/feature/probe_temp_comp.cpp>
   -<src/feature/runout.cpp> -<src/gcode/feature/runout>
-  -<src/feature/snmm.cpp>
   -<src/feature/solenoid.cpp> -<src/gcode/control/M380_M381.cpp>
   -<src/feature/spindle_laser.cpp> -<src/gcode/control/M3-M5.cpp>
   -<src/feature/tmc_util.cpp> -<src/module/stepper/trinamic.cpp>
@@ -304,7 +304,8 @@ PRINTER_EVENT_LEDS      = src_filter=+<src/feature/leds/printer_event_leds.cpp>
 TEMP_STAT_LEDS          = src_filter=+<src/feature/leds/tempstat.cpp>
 MAX7219_DEBUG           = src_filter=+<src/feature/max7219.cpp> +<src/gcode/feature/leds/M7219.cpp>
 MIXING_EXTRUDER         = src_filter=+<src/feature/mixing.cpp> +<src/gcode/feature/mixing/M163-M165.cpp>
-PRUSA_MMU2              = src_filter=+<src/feature/mmu2> +<src/gcode/feature/prusa_MMU2>
+HAS_PRUSA_MMU1          = src_filter=+<src/feature/mmu/mmu.cpp>
+HAS_PRUSA_MMU2          = src_filter=+<src/feature/mmu/mmu2.cpp> +<src/gcode/feature/prusa_MMU2>
 PASSWORD_FEATURE        = src_filter=+<src/feature/password> +<src/gcode/feature/password>
 ADVANCED_PAUSE_FEATURE  = src_filter=+<src/feature/pause.cpp> +<src/gcode/feature/pause/M600.cpp> +<src/gcode/feature/pause/M603.cpp>
 AUTO_POWER_CONTROL      = src_filter=+<src/feature/power.cpp>
@@ -312,8 +313,7 @@ HAS_POWER_MONITOR       = src_filter=+<src/feature/power_monitor.cpp> +<src/gcod
 POWER_LOSS_RECOVERY     = src_filter=+<src/feature/powerloss.cpp> +<src/gcode/feature/powerloss>
 PROBE_TEMP_COMPENSATION = src_filter=+<src/feature/probe_temp_comp.cpp> +<src/gcode/calibrate/G76_M192_M871.cpp>
 HAS_FILAMENT_SENSOR     = src_filter=+<src/feature/runout.cpp> +<src/gcode/feature/runout>
-MK2_MULTIPLEXER         = src_filter=+<src/feature/snmm.cpp>
-EXT_SOLENOID|MANUAL_SOLENOID_CONTROL = src_filter=+<src/feature/solenoid.cpp> +<src/gcode/control/M380_M381.cpp>
+(EXT|MANUAL)_SOLENOID.* = src_filter=+<src/feature/solenoid.cpp> +<src/gcode/control/M380_M381.cpp>
 HAS_CUTTER              = src_filter=+<src/feature/spindle_laser.cpp> +<src/gcode/control/M3-M5.cpp>
 EXPERIMENTAL_I2CBUS     = src_filter=+<src/feature/twibus.cpp> +<src/gcode/feature/i2c>
 MECHANICAL_GANTRY_CAL.+ = src_filter=+<src/gcode/calibrate/G34.cpp>