Add and apply REPEAT macro (#15829)

Marlin/src/Marlin.cpp

@@ -286,7 +286,8 @@ void quickstop_stepper() {
 }
 
 void enable_e_steppers() {
-  enable_E0(); enable_E1(); enable_E2(); enable_E3(); enable_E4(); enable_E5();
+  #define _ENA_E(N) enable_E##N();
+  REPEAT(E_STEPPERS, _ENA_E)
 }
 
 void enable_all_steppers() {
@@ -300,17 +301,14 @@ void enable_all_steppers() {
 }
 
 void disable_e_steppers() {
-  disable_E0(); disable_E1(); disable_E2(); disable_E3(); disable_E4(); disable_E5();
+  #define _DIS_E(N) disable_E##N();
+  REPEAT(E_STEPPERS, _DIS_E)
 }
 
 void disable_e_stepper(const uint8_t e) {
+  #define _CASE_DIS_E(N) case N: disable_E##N(); break;
   switch (e) {
-    case 0: disable_E0(); break;
-    case 1: disable_E1(); break;
-    case 2: disable_E2(); break;
-    case 3: disable_E3(); break;
-    case 4: disable_E4(); break;
-    case 5: disable_E5(); break;
+    REPEAT(EXTRUDERS, _CASE_DIS_E)
   }
 }
 
@@ -547,24 +545,11 @@ void manage_inactivity(const bool ignore_stepper_queue/*=false*/) {
       #else // !SWITCHING_EXTRUDER
         bool oldstatus;
         switch (active_extruder) {
-          default: oldstatus = E0_ENABLE_READ(); enable_E0(); break;
-          #if E_STEPPERS > 1
-            case 1: oldstatus = E1_ENABLE_READ(); enable_E1(); break;
-            #if E_STEPPERS > 2
-              case 2: oldstatus = E2_ENABLE_READ(); enable_E2(); break;
-              #if E_STEPPERS > 3
-                case 3: oldstatus = E3_ENABLE_READ(); enable_E3(); break;
-                #if E_STEPPERS > 4
-                  case 4: oldstatus = E4_ENABLE_READ(); enable_E4(); break;
-                  #if E_STEPPERS > 5
-                    case 5: oldstatus = E5_ENABLE_READ(); enable_E5(); break;
-                  #endif // E_STEPPERS > 5
-                #endif // E_STEPPERS > 4
-              #endif // E_STEPPERS > 3
-            #endif // E_STEPPERS > 2
-          #endif // E_STEPPERS > 1
+          default:
+          #define _CASE_EN(N) case N: oldstatus = E##N_ENABLE_READ(); enable_E##N(); break;
+          REPEAT(E_STEPPERS, _CASE_EN);
         }
-      #endif // !SWITCHING_EXTRUDER
+      #endif
 
       const float olde = current_position.e;
       current_position.e += EXTRUDER_RUNOUT_EXTRUDE;
@@ -585,22 +570,8 @@ void manage_inactivity(const bool ignore_stepper_queue/*=false*/) {
         }
       #else // !SWITCHING_EXTRUDER
         switch (active_extruder) {
-          case 0: E0_ENABLE_WRITE(oldstatus); break;
-          #if E_STEPPERS > 1
-            case 1: E1_ENABLE_WRITE(oldstatus); break;
-            #if E_STEPPERS > 2
-              case 2: E2_ENABLE_WRITE(oldstatus); break;
-              #if E_STEPPERS > 3
-                case 3: E3_ENABLE_WRITE(oldstatus); break;
-                #if E_STEPPERS > 4
-                  case 4: E4_ENABLE_WRITE(oldstatus); break;
-                  #if E_STEPPERS > 5
-                    case 5: E5_ENABLE_WRITE(oldstatus); break;
-                  #endif // E_STEPPERS > 5
-                #endif // E_STEPPERS > 4
-              #endif // E_STEPPERS > 3
-            #endif // E_STEPPERS > 2
-          #endif // E_STEPPERS > 1
+          #define _CASE_RESTORE(N) case N: E##N##_ENABLE_WRITE(oldstatus); break;
+          REPEAT(E_STEPPERS, _CASE_RESTORE);
         }
       #endif // !SWITCHING_EXTRUDER
 

Marlin/src/core/macros.h

@@ -165,6 +165,7 @@
 
 // Macros to support option testing
 #define _CAT(a,V...) a##V
+#define CAT(a,V...) _CAT(a,V)
 #define SWITCH_ENABLED_false 0
 #define SWITCH_ENABLED_true  1
 #define SWITCH_ENABLED_0     0
@@ -229,32 +230,6 @@
 #define _JOIN_1(O)         (O)
 #define JOIN_N(N,C,V...)   (DO(JOIN,C,LIST_N(N,V)))
 
-// Macros for adding
-#define INC_0 1
-#define INC_1 2
-#define INC_2 3
-#define INC_3 4
-#define INC_4 5
-#define INC_5 6
-#define INC_6 7
-#define INC_7 8
-#define INC_8 9
-#define INCREMENT_(n) INC_##n
-#define INCREMENT(n) INCREMENT_(n)
-
-// Macros for subtracting
-#define DEC_1 0
-#define DEC_2 1
-#define DEC_3 2
-#define DEC_4 3
-#define DEC_5 4
-#define DEC_6 5
-#define DEC_7 6
-#define DEC_8 7
-#define DEC_9 8
-#define DECREMENT_(n) DEC_##n
-#define DECREMENT(n) DECREMENT_(n)
-
 #define NOOP (void(0))
 
 #define CEILING(x,y) (((x) + (y) - 1) / (y))
@@ -346,3 +321,127 @@
   #define _MAX(V...)      _MAX_N(NUM_ARGS(V), V)
 
 #endif
+
+// Macros for adding
+#define INC_0 1
+#define INC_1 2
+#define INC_2 3
+#define INC_3 4
+#define INC_4 5
+#define INC_5 6
+#define INC_6 7
+#define INC_7 8
+#define INC_8 9
+#define INCREMENT_(n) INC_##n
+#define INCREMENT(n) INCREMENT_(n)
+
+#define ADD0(N)  N
+#define ADD1(N)  INCREMENT_(N)
+#define ADD2(N)  ADD1(ADD1(N))
+#define ADD3(N)  ADD1(ADD2(N))
+#define ADD4(N)  ADD2(ADD2(N))
+#define ADD5(N)  ADD2(ADD3(N))
+#define ADD6(N)  ADD3(ADD3(N))
+#define ADD7(N)  ADD3(ADD4(N))
+#define ADD8(N)  ADD4(ADD4(N))
+#define ADD9(N)  ADD4(ADD5(N))
+#define ADD10(N) ADD5(ADD5(N))
+
+// Macros for subtracting
+#define DEC_0 0
+#define DEC_1 0
+#define DEC_2 1
+#define DEC_3 2
+#define DEC_4 3
+#define DEC_5 4
+#define DEC_6 5
+#define DEC_7 6
+#define DEC_8 7
+#define DEC_9 8
+#define DECREMENT_(n) DEC_##n
+#define DECREMENT(n) DECREMENT_(n)
+
+#define SUB0(N)  N
+#define SUB1(N)  DECREMENT_(N)
+#define SUB2(N)  SUB1(SUB1(N))
+#define SUB3(N)  SUB1(SUB2(N))
+#define SUB4(N)  SUB2(SUB2(N))
+#define SUB5(N)  SUB2(SUB3(N))
+#define SUB6(N)  SUB3(SUB3(N))
+#define SUB7(N)  SUB3(SUB4(N))
+#define SUB8(N)  SUB4(SUB4(N))
+#define SUB9(N)  SUB4(SUB5(N))
+#define SUB10(N) SUB5(SUB5(N))
+
+//
+// Primitives supporting precompiler REPEAT
+//
+#define FIRST(a,...)    a
+#define SECOND(a,b,...) b
+
+// Defer expansion
+#define EMPTY()
+#define DEFER(M)  M EMPTY()
+#define DEFER2(M) M EMPTY EMPTY()()
+#define DEFER3(M) M EMPTY EMPTY EMPTY()()()
+#define DEFER4(M) M EMPTY EMPTY EMPTY EMPTY()()()()
+
+// Force define expansion
+#define EVAL(V...)     EVAL16(V)
+#define EVAL1024(V...) EVAL512(EVAL512(V))
+#define EVAL512(V...)  EVAL256(EVAL256(V))
+#define EVAL256(V...)  EVAL128(EVAL128(V))
+#define EVAL128(V...)  EVAL64(EVAL64(V))
+#define EVAL64(V...)   EVAL32(EVAL32(V))
+#define EVAL32(V...)   EVAL16(EVAL16(V))
+#define EVAL16(V...)   EVAL8(EVAL8(V))
+#define EVAL8(V...)    EVAL4(EVAL4(V))
+#define EVAL4(V...)    EVAL2(EVAL2(V))
+#define EVAL2(V...)    EVAL1(EVAL1(V))
+#define EVAL1(V...)    V
+
+#define IS_PROBE(V...) SECOND(V, 0)     // Get the second item passed, or 0
+#define PROBE() ~, 1                    // Second item will be 1 if this is passed
+#define _NOT_0 PROBE()
+#define NOT(x) IS_PROBE(_CAT(_NOT_, x)) // NOT('0') gets '1'. Anything else gets '0'.
+#define _BOOL(x) NOT(NOT(x))            // NOT('0') gets '0'. Anything else gets '1'.
+
+#define IF_ELSE(TF) _IF_ELSE(_BOOL(TF))
+#define _IF_ELSE(TF) _CAT(_IF_, TF)
+
+#define _IF_1(V...) V _IF_1_ELSE
+#define _IF_0(...)    _IF_0_ELSE
+
+#define _IF_1_ELSE(...)
+#define _IF_0_ELSE(V...) V
+
+#define HAS_ARGS(V...) _BOOL(FIRST(_END_OF_ARGUMENTS_ V)())
+#define _END_OF_ARGUMENTS_() 0
+
+//
+// REPEAT core macros. Recurse N times with ascending I.
+//
+
+// Call OP(I) N times with ascending counter.
+#define _REPEAT(_RPT_I,_RPT_N,_RPT_OP)                        \
+  _RPT_OP(_RPT_I)                                             \
+  IF_ELSE(SUB1(_RPT_N))                                       \
+    ( DEFER2(__REPEAT)()(ADD1(_RPT_I),SUB1(_RPT_N),_RPT_OP) ) \
+    ( /* Do nothing */ )
+#define __REPEAT() _REPEAT
+
+// Call OP(I, ...) N times with ascending counter.
+#define _REPEAT2(_RPT_I,_RPT_N,_RPT_OP,V...)                     \
+  _RPT_OP(_RPT_I,V)                                              \
+  IF_ELSE(SUB1(_RPT_N))                                          \
+    ( DEFER2(__REPEAT2)()(ADD1(_RPT_I),SUB1(_RPT_N),_RPT_OP,V) ) \
+    ( /* Do nothing */ )
+#define __REPEAT2() _REPEAT2
+
+// Repeat a macro passing S...N-1.
+#define REPEAT_S(S,N,OP)        EVAL(_REPEAT(S,SUB##S(N),OP))
+#define REPEAT(N,OP)            REPEAT_S(0,N,OP)
+
+// Repeat a macro passing 0...N-1 plus additional arguments.
+#define REPEAT2_S(S,N,OP,V...)  EVAL(_REPEAT2(S,SUB##S(N),OP,V))
+#define REPEAT2(N,OP,V...)      REPEAT2_S(0,N,OP,V)

Marlin/src/feature/controllerfan.cpp

@@ -56,23 +56,9 @@ void controllerfan_update() {
           || Z3_ENABLE_READ() == Z_ENABLE_ON
         #endif
         #if E_STEPPERS
-          || E0_ENABLE_READ() == E_ENABLE_ON
-          #if E_STEPPERS > 1
-            || E1_ENABLE_READ() == E_ENABLE_ON
-            #if E_STEPPERS > 2
-              || E2_ENABLE_READ() == E_ENABLE_ON
-              #if E_STEPPERS > 3
-                || E3_ENABLE_READ() == E_ENABLE_ON
-                #if E_STEPPERS > 4
-                  || E4_ENABLE_READ() == E_ENABLE_ON
-                  #if E_STEPPERS > 5
-                    || E5_ENABLE_READ() == E_ENABLE_ON
-                  #endif // E_STEPPERS > 5
-                #endif // E_STEPPERS > 4
-              #endif // E_STEPPERS > 3
-            #endif // E_STEPPERS > 2
-          #endif // E_STEPPERS > 1
-        #endif // E_STEPPERS
+          #define _OR_ENABLED_E(N) || E##N##_ENABLE_READ() == E_ENABLE_ON
+          REPEAT(E_STEPPERS, _OR_ENABLED_E)
+        #endif
     ) {
       lastMotorOn = ms; //... set time to NOW so the fan will turn on
     }

Marlin/src/feature/power.cpp

@@ -59,33 +59,19 @@ bool Power::is_power_needed() {
     #if HAS_HEATED_BED
       || thermalManager.temp_bed.soft_pwm_amount > 0
     #endif
-      #if HAS_X2_ENABLE
-        || X2_ENABLE_READ() == X_ENABLE_ON
-      #endif
-      #if HAS_Y2_ENABLE
-        || Y2_ENABLE_READ() == Y_ENABLE_ON
-      #endif
-      #if HAS_Z2_ENABLE
-        || Z2_ENABLE_READ() == Z_ENABLE_ON
-      #endif
-      #if E_STEPPERS
-        || E0_ENABLE_READ() == E_ENABLE_ON
-        #if E_STEPPERS > 1
-          || E1_ENABLE_READ() == E_ENABLE_ON
-          #if E_STEPPERS > 2
-            || E2_ENABLE_READ() == E_ENABLE_ON
-            #if E_STEPPERS > 3
-              || E3_ENABLE_READ() == E_ENABLE_ON
-              #if E_STEPPERS > 4
-                || E4_ENABLE_READ() == E_ENABLE_ON
-                #if E_STEPPERS > 5
-                  || E5_ENABLE_READ() == E_ENABLE_ON
-                #endif // E_STEPPERS > 5
-              #endif // E_STEPPERS > 4
-            #endif // E_STEPPERS > 3
-          #endif // E_STEPPERS > 2
-        #endif // E_STEPPERS > 1
-      #endif // E_STEPPERS
+    #if HAS_X2_ENABLE
+      || X2_ENABLE_READ() == X_ENABLE_ON
+    #endif
+    #if HAS_Y2_ENABLE
+      || Y2_ENABLE_READ() == Y_ENABLE_ON
+    #endif
+    #if HAS_Z2_ENABLE
+      || Z2_ENABLE_READ() == Z_ENABLE_ON
+    #endif
+    #if E_STEPPERS
+      #define _OR_ENABLED_E(N) || E##N##_ENABLE_READ() == E_ENABLE_ON
+      REPEAT(E_STEPPERS, _OR_ENABLED_E)
+    #endif
   ) return true;
 
   HOTEND_LOOP() if (thermalManager.degTargetHotend(e) > 0) return true;

Marlin/src/gcode/feature/mixing/M163-M165.cpp

@@ -79,20 +79,7 @@ void GcodeSuite::M164() {
     // Get mixing parameters from the GCode
     // The total "must" be 1.0 (but it will be normalized)
     // If no mix factors are given, the old mix is preserved
-    const char mixing_codes[] = { 'A', 'B'
-      #if MIXING_STEPPERS > 2
-        , 'C'
-        #if MIXING_STEPPERS > 3
-          , 'D'
-          #if MIXING_STEPPERS > 4
-            , 'H'
-            #if MIXING_STEPPERS > 5
-              , 'I'
-            #endif // MIXING_STEPPERS > 5
-          #endif // MIXING_STEPPERS > 4
-        #endif // MIXING_STEPPERS > 3
-      #endif // MIXING_STEPPERS > 2
-    };
+    const char mixing_codes[] = { LIST_N(MIXING_STEPPERS, 'A', 'B', 'C', 'D', 'H', 'I') };
     uint8_t mix_bits = 0;
     MIXER_STEPPER_LOOP(i) {
       if (parser.seenval(mixing_codes[i])) {

Marlin/src/inc/Conditionals_post.h

@@ -1017,7 +1017,7 @@
 #define HAS_TEMP_ADC_BED HAS_ADC_TEST(BED)
 #define HAS_TEMP_ADC_CHAMBER HAS_ADC_TEST(CHAMBER)
 
-#define HAS_TEMP_HOTEND (HAS_TEMP_ADC_0 || ENABLED(HEATER_0_USES_MAX6675))
+#define HAS_TEMP_HOTEND (HOTENDS > 0 && (HAS_TEMP_ADC_0 || ENABLED(HEATER_0_USES_MAX6675)))
 #define HAS_TEMP_BED HAS_TEMP_ADC_BED
 #define HAS_TEMP_CHAMBER HAS_TEMP_ADC_CHAMBER
 #define HAS_HEATED_CHAMBER (HAS_TEMP_CHAMBER && PIN_EXISTS(HEATER_CHAMBER))

Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/temperature_screen.cpp

@@ -85,22 +85,8 @@ bool TemperatureScreen::onTouchHeld(uint8_t tag) {
     case 11: UI_INCREMENT(TargetFan_percent, FAN0); break;
     #endif
     case 30:
-      setTargetTemp_celsius(0,E0);
-      #if HOTENDS > 1
-        setTargetTemp_celsius(0,E1);
-        #if HOTENDS > 2
-          setTargetTemp_celsius(0,E2);
-          #if HOTENDS > 3
-            setTargetTemp_celsius(0,E3);
-            #if HOTENDS > 4
-              setTargetTemp_celsius(0,E4);
-              #if HOTENDS > 5
-                setTargetTemp_celsius(0,E5);
-              #endif
-            #endif
-          #endif
-        #endif
-      #endif
+      #define _HOTEND_OFF(N) setTargetTemp_celsius(0,E##N);
+      REPEAT(HOTENDS, _HOTEND_OFF);
       #if HAS_HEATED_BED
         setTargetTemp_celsius(0,BED);
       #endif

Marlin/src/lcd/menu/menu_configuration.cpp

@@ -277,8 +277,10 @@ void menu_advanced_settings();
 #if DISABLED(SLIM_LCD_MENUS)
 
   void _menu_configuration_preheat_settings(const uint8_t material) {
-    #define MINTEMP_ALL _MIN(LIST_N(HOTENDS, HEATER_0_MINTEMP, HEATER_1_MINTEMP, HEATER_2_MINTEMP, HEATER_3_MINTEMP, HEATER_4_MINTEMP, HEATER_5_MINTEMP), 999)
-    #define MAXTEMP_ALL _MAX(LIST_N(HOTENDS, HEATER_0_MAXTEMP, HEATER_1_MAXTEMP, HEATER_2_MAXTEMP, HEATER_3_MAXTEMP, HEATER_4_MAXTEMP, HEATER_5_MAXTEMP), 0)
+    #define _MINTEMP_ITEM(N) HEATER_##N##_MINTEMP,
+    #define _MAXTEMP_ITEM(N) HEATER_##N##_MAXTEMP,
+    #define MINTEMP_ALL _MIN(REPEAT(HOTENDS, _MINTEMP_ITEM) 999)
+    #define MAXTEMP_ALL _MAX(REPEAT(HOTENDS, _MAXTEMP_ITEM) 0)
     START_MENU();
     BACK_ITEM(MSG_CONFIGURATION);
     EDIT_ITEM(percent, MSG_FAN_SPEED, &ui.preheat_fan_speed[material], 0, 255);

Marlin/src/lcd/menu/menu_mixer.cpp

@@ -158,10 +158,11 @@ void lcd_mixer_mix_edit() {
 
   #if CHANNEL_MIX_EDITING
 
-    #define EDIT_COLOR(N) EDIT_ITEM_FAST(float52, MSG_MIX_COMPONENT_##N, &mixer.collector[N-1], 0, 10);
-
     START_MENU();
     BACK_ITEM(MSG_MIXER);
+
+    #define EDIT_COLOR(N) EDIT_ITEM_FAST(float52, MSG_MIX_COMPONENT_##N, &mixer.collector[N-1], 0, 10);
+
     EDIT_COLOR(1);
     EDIT_COLOR(2);
     #if MIXING_STEPPERS > 2
@@ -176,6 +177,7 @@ void lcd_mixer_mix_edit() {
         #endif
       #endif
     #endif
+
     ACTION_ITEM(MSG_CYCLE_MIX, _lcd_mixer_cycle_mix);
     ACTION_ITEM(MSG_COMMIT_VTOOL, _lcd_mixer_commit_vtool);
     END_MENU();

Marlin/src/module/planner.cpp

@@ -1924,121 +1924,32 @@ bool Planner::_populate_block(block_t * const block, bool split_move,
 
       #if ENABLED(DISABLE_INACTIVE_EXTRUDER) // Enable only the selected extruder
 
-        #define DISABLE_IDLE_E(N) if (!g_uc_extruder_last_move[N]) disable_E##N();
-
         for (uint8_t i = 0; i < EXTRUDERS; i++)
           if (g_uc_extruder_last_move[i] > 0) g_uc_extruder_last_move[i]--;
 
-        switch (extruder) {
-          case 0:
-            #if EXTRUDERS > 1
-              DISABLE_IDLE_E(1);
-              #if EXTRUDERS > 2
-                DISABLE_IDLE_E(2);
-                #if EXTRUDERS > 3
-                  DISABLE_IDLE_E(3);
-                  #if EXTRUDERS > 4
-                    DISABLE_IDLE_E(4);
-                    #if EXTRUDERS > 5
-                      DISABLE_IDLE_E(5);
-                    #endif // EXTRUDERS > 5
-                  #endif // EXTRUDERS > 4
-                #endif // EXTRUDERS > 3
-              #endif // EXTRUDERS > 2
-            #endif // EXTRUDERS > 1
-            enable_E0();
-            g_uc_extruder_last_move[0] = (BLOCK_BUFFER_SIZE) * 2;
-            #if HAS_DUPLICATION_MODE
-              if (extruder_duplication_enabled) {
-                enable_E1();
-                g_uc_extruder_last_move[1] = (BLOCK_BUFFER_SIZE) * 2;
-              }
-            #endif
-          break;
-          #if EXTRUDERS > 1
-            case 1:
-              DISABLE_IDLE_E(0);
-              #if EXTRUDERS > 2
-                DISABLE_IDLE_E(2);
-                #if EXTRUDERS > 3
-                  DISABLE_IDLE_E(3);
-                  #if EXTRUDERS > 4
-                    DISABLE_IDLE_E(4);
-                    #if EXTRUDERS > 5
-                      DISABLE_IDLE_E(5);
-                    #endif // EXTRUDERS > 5
-                  #endif // EXTRUDERS > 4
-                #endif // EXTRUDERS > 3
-              #endif // EXTRUDERS > 2
-              enable_E1();
-              g_uc_extruder_last_move[1] = (BLOCK_BUFFER_SIZE) * 2;
-            break;
-            #if EXTRUDERS > 2
-              case 2:
-                DISABLE_IDLE_E(0);
-                DISABLE_IDLE_E(1);
-                #if EXTRUDERS > 3
-                  DISABLE_IDLE_E(3);
-                  #if EXTRUDERS > 4
-                    DISABLE_IDLE_E(4);
-                    #if EXTRUDERS > 5
-                      DISABLE_IDLE_E(5);
-                    #endif
-                  #endif
-                #endif
-                enable_E2();
-                g_uc_extruder_last_move[2] = (BLOCK_BUFFER_SIZE) * 2;
-              break;
-              #if EXTRUDERS > 3
-                case 3:
-                  DISABLE_IDLE_E(0);
-                  DISABLE_IDLE_E(1);
-                  DISABLE_IDLE_E(2);
-                  #if EXTRUDERS > 4
-                    DISABLE_IDLE_E(4);
-                    #if EXTRUDERS > 5
-                      DISABLE_IDLE_E(5);
-                    #endif
-                  #endif
-                  enable_E3();
-                  g_uc_extruder_last_move[3] = (BLOCK_BUFFER_SIZE) * 2;
-                break;
-                #if EXTRUDERS > 4
-                  case 4:
-                    DISABLE_IDLE_E(0);
-                    DISABLE_IDLE_E(1);
-                    DISABLE_IDLE_E(2);
-                    DISABLE_IDLE_E(3);
-                    #if EXTRUDERS > 5
-                      DISABLE_IDLE_E(5);
-                    #endif
-                    enable_E4();
-                    g_uc_extruder_last_move[4] = (BLOCK_BUFFER_SIZE) * 2;
-                  break;
-                  #if EXTRUDERS > 5
-                    case 5:
-                      DISABLE_IDLE_E(0);
-                      DISABLE_IDLE_E(1);
-                      DISABLE_IDLE_E(2);
-                      DISABLE_IDLE_E(3);
-                      DISABLE_IDLE_E(4);
-                      enable_E5();
-                      g_uc_extruder_last_move[5] = (BLOCK_BUFFER_SIZE) * 2;
-                    break;
-                  #endif // EXTRUDERS > 5
-                #endif // EXTRUDERS > 4
-              #endif // EXTRUDERS > 3
-            #endif // EXTRUDERS > 2
-          #endif // EXTRUDERS > 1
-        }
+        #if HAS_DUPLICATION_MODE
+          if (extruder_duplication_enabled && extruder == 0) {
+            enable_E1();
+            g_uc_extruder_last_move[1] = (BLOCK_BUFFER_SIZE) * 2;
+          }
+        #endif
+
+        #define ENABLE_ONE_E(N) do{ \
+          if (extruder == N) { \
+            enable_E##N(); \
+            g_uc_extruder_last_move[N] = (BLOCK_BUFFER_SIZE) * 2; \
+          } \
+          else if (!g_uc_extruder_last_move[N]) \
+            disable_E##N(); \
+        }while(0);
+
       #else
-        enable_E0();
-        enable_E1();
-        enable_E2();
-        enable_E3();
-        enable_E4();
-        enable_E5();
+
+        #define ENABLE_ONE_E(N) enable_E##N();
+
       #endif
+
+      REPEAT(EXTRUDERS, ENABLE_ONE_E);
     }
   #endif // EXTRUDERS
 

Marlin/src/module/temperature.cpp

@@ -628,31 +628,31 @@ int16_t Temperature::getHeaterPower(const heater_ind_t heater_id) {
   #define CHAMBER_FAN_INDEX HOTENDS
 
   void Temperature::checkExtruderAutoFans() {
-    #define _EFAN(A,B) _EFANOVERLAP(A,B) ? B :
+    #define _EFAN(B,A) _EFANOVERLAP(A,B) ? B :
     static const uint8_t fanBit[] PROGMEM = {
       0
       #if HOTENDS > 1
-        , _EFAN(1,0) 1
-      #endif
-      #if HOTENDS > 2
-        , _EFAN(2,0) _EFAN(2,1) 2
-      #endif
-      #if HOTENDS > 3
-        , _EFAN(3,0) _EFAN(3,1) _EFAN(3,2) 3
-      #endif
-      #if HOTENDS > 4
-        , _EFAN(4,0) _EFAN(4,1) _EFAN(4,2) _EFAN(4,3) 4
-      #endif
-      #if HOTENDS > 5
-        , _EFAN(5,0) _EFAN(5,1) _EFAN(5,2) _EFAN(5,3) _EFAN(5,4) 5
+        , REPEAT2(1,_EFAN,1) 1
+        #if HOTENDS > 2
+          , REPEAT2(2,_EFAN,2) 2
+          #if HOTENDS > 3
+            , REPEAT2(3,_EFAN,3) 3
+            #if HOTENDS > 4
+              , REPEAT2(4,_EFAN,4) 4
+              #if HOTENDS > 5
+                , REPEAT2(5,_EFAN,5) 5
+              #endif
+            #endif
+          #endif
+        #endif
       #endif
       #if HAS_AUTO_CHAMBER_FAN
         #define _CFAN(B) _FANOVERLAP(CHAMBER,B) ? B :
-        , _CFAN(0) _CFAN(1) _CFAN(2) _CFAN(3) _CFAN(4) _CFAN(5) 6
+        , REPEAT(HOTENDS,_CFAN) (HOTENDS)
       #endif
     };
-    uint8_t fanState = 0;
 
+    uint8_t fanState = 0;
     HOTEND_LOOP()
       if (temp_hotend[e].celsius >= EXTRUDER_AUTO_FAN_TEMPERATURE)
         SBI(fanState, pgm_read_byte(&fanBit[e]));
@@ -1953,22 +1953,7 @@ void Temperature::disable_all_heaters() {
   }
 
   #if HAS_TEMP_HOTEND
-    DISABLE_HEATER(0);
-    #if HOTENDS > 1
-      DISABLE_HEATER(1);
-      #if HOTENDS > 2
-        DISABLE_HEATER(2);
-        #if HOTENDS > 3
-          DISABLE_HEATER(3);
-          #if HOTENDS > 4
-            DISABLE_HEATER(4);
-            #if HOTENDS > 5
-              DISABLE_HEATER(5);
-            #endif // HOTENDS > 5
-          #endif // HOTENDS > 4
-        #endif // HOTENDS > 3
-      #endif // HOTENDS > 2
-    #endif // HOTENDS > 1
+    REPEAT(HOTENDS, DISABLE_HEATER);
   #endif
 
   #if HAS_HEATED_BED
@@ -2223,22 +2208,14 @@ void Temperature::readings_ready() {
         TEMPDIR(0)
       #endif
       #if HOTENDS > 1
+        #define _TEMPDIR(N) , TEMPDIR(N)
         #if ENABLED(HEATER_1_USES_MAX6675)
           , 0
         #else
-          , TEMPDIR(1)
+          _TEMPDIR(1)
         #endif
         #if HOTENDS > 2
-          , TEMPDIR(2)
-          #if HOTENDS > 3
-            , TEMPDIR(3)
-            #if HOTENDS > 4
-              , TEMPDIR(4)
-              #if HOTENDS > 5
-                , TEMPDIR(5)
-              #endif // HOTENDS > 5
-            #endif // HOTENDS > 4
-          #endif // HOTENDS > 3
+          REPEAT_S(2, HOTENDS, _TEMPDIR)
         #endif // HOTENDS > 2
       #endif // HOTENDS > 1
     };
@@ -2391,24 +2368,9 @@ void Temperature::isr() {
       pwm_count_tmp -= 127;
 
       #if HOTENDS
-        #define _PWM_MOD_E(N) _PWM_MOD(N,soft_pwm_hotend[N],temp_hotend[N])
-        _PWM_MOD_E(0);
-        #if HOTENDS > 1
-          _PWM_MOD_E(1);
-          #if HOTENDS > 2
-            _PWM_MOD_E(2);
-            #if HOTENDS > 3
-              _PWM_MOD_E(3);
-              #if HOTENDS > 4
-                _PWM_MOD_E(4);
-                #if HOTENDS > 5
-                  _PWM_MOD_E(5);
-                #endif // HOTENDS > 5
-              #endif // HOTENDS > 4
-            #endif // HOTENDS > 3
-          #endif // HOTENDS > 2
-        #endif // HOTENDS > 1
-      #endif // HOTENDS
+        #define _PWM_MOD_E(N) _PWM_MOD(N,soft_pwm_hotend[N],temp_hotend[N]);
+        REPEAT(HOTENDS, _PWM_MOD_E);
+      #endif
 
       #if HAS_HEATED_BED
         _PWM_MOD(BED,soft_pwm_bed,temp_bed);
@@ -2438,24 +2400,9 @@ void Temperature::isr() {
     else {
       #define _PWM_LOW(N,S) do{ if (S.count <= pwm_count_tmp) WRITE_HEATER_##N(LOW); }while(0)
       #if HOTENDS
-        #define _PWM_LOW_E(N) _PWM_LOW(N, soft_pwm_hotend[N])
-        _PWM_LOW_E(0);
-        #if HOTENDS > 1
-          _PWM_LOW_E(1);
-          #if HOTENDS > 2
-            _PWM_LOW_E(2);
-            #if HOTENDS > 3
-              _PWM_LOW_E(3);
-              #if HOTENDS > 4
-                _PWM_LOW_E(4);
-                #if HOTENDS > 5
-                  _PWM_LOW_E(5);
-                #endif // HOTENDS > 5
-              #endif // HOTENDS > 4
-            #endif // HOTENDS > 3
-          #endif // HOTENDS > 2
-        #endif // HOTENDS > 1
-      #endif // HOTENDS
+        #define _PWM_LOW_E(N) _PWM_LOW(N, soft_pwm_hotend[N]);
+        REPEAT(HOTENDS, _PWM_LOW_E);
+      #endif
 
       #if HAS_HEATED_BED
         _PWM_LOW(BED, soft_pwm_bed);
@@ -2504,24 +2451,9 @@ void Temperature::isr() {
     if (slow_pwm_count == 0) {
 
       #if HOTENDS
-        #define _SLOW_PWM_E(N) _SLOW_PWM(N, soft_pwm_hotend[N], temp_hotend[N])
-        _SLOW_PWM_E(0);
-        #if HOTENDS > 1
-          _SLOW_PWM_E(1);
-          #if HOTENDS > 2
-            _SLOW_PWM_E(2);
-            #if HOTENDS > 3
-              _SLOW_PWM_E(3);
-              #if HOTENDS > 4
-                _SLOW_PWM_E(4);
-                #if HOTENDS > 5
-                  _SLOW_PWM_E(5);
-                #endif // HOTENDS > 5
-              #endif // HOTENDS > 4
-            #endif // HOTENDS > 3
-          #endif // HOTENDS > 2
-        #endif // HOTENDS > 1
-      #endif // HOTENDS
+        #define _SLOW_PWM_E(N) _SLOW_PWM(N, soft_pwm_hotend[N], temp_hotend[N]);
+        REPEAT(HOTENDS, _SLOW_PWM_E);
+      #endif
 
       #if HAS_HEATED_BED
         _SLOW_PWM(BED, soft_pwm_bed, temp_bed);
@@ -2531,23 +2463,8 @@ void Temperature::isr() {
 
     #if HOTENDS
       #define _PWM_OFF_E(N) _PWM_OFF(N, soft_pwm_hotend[N]);
-      _PWM_OFF_E(0);
-      #if HOTENDS > 1
-        _PWM_OFF_E(1);
-        #if HOTENDS > 2
-          _PWM_OFF_E(2);
-          #if HOTENDS > 3
-            _PWM_OFF_E(3);
-            #if HOTENDS > 4
-              _PWM_OFF_E(4);
-              #if HOTENDS > 5
-                _PWM_OFF_E(5);
-              #endif // HOTENDS > 5
-            #endif // HOTENDS > 4
-          #endif // HOTENDS > 3
-        #endif // HOTENDS > 2
-      #endif // HOTENDS > 1
-    #endif // HOTENDS
+      REPEAT(HOTENDS, _PWM_OFF_E);
+    #endif
 
     #if HAS_HEATED_BED
       _PWM_OFF(BED, soft_pwm_bed);
@@ -2598,23 +2515,8 @@ void Temperature::isr() {
       slow_pwm_count &= 0x7F;
 
       #if HOTENDS
-        soft_pwm_hotend[0].dec();
-        #if HOTENDS > 1
-          soft_pwm_hotend[1].dec();
-          #if HOTENDS > 2
-            soft_pwm_hotend[2].dec();
-            #if HOTENDS > 3
-              soft_pwm_hotend[3].dec();
-              #if HOTENDS > 4
-                soft_pwm_hotend[4].dec();
-                #if HOTENDS > 5
-                  soft_pwm_hotend[5].dec();
-                #endif // HOTENDS > 5
-              #endif // HOTENDS > 4
-            #endif // HOTENDS > 3
-          #endif // HOTENDS > 2
-        #endif // HOTENDS > 1
-      #endif // HOTENDS
+        HOTEND_LOOP() soft_pwm_hotend[e].dec();
+      #endif
       #if HAS_HEATED_BED
         soft_pwm_bed.dec();
       #endif