Header and pins changes to support 5 extruders

Marlin/Marlin.h

   #define disable_e2() NOOP
   #define  enable_e3() NOOP
   #define disable_e3() NOOP
+  #define  enable_e4() NOOP
+  #define disable_e4() NOOP
 
 #else // !MIXING_EXTRUDER
 
     #define disable_e3() NOOP
   #endif
 
+  #if E_STEPPERS > 4 && HAS_E4_ENABLE
+    #define  enable_e4() E4_ENABLE_WRITE( E_ENABLE_ON)
+    #define disable_e4() E4_ENABLE_WRITE(!E_ENABLE_ON)
+  #else
+    #define  enable_e4() NOOP
+    #define disable_e4() NOOP
+  #endif
+
 #endif // !MIXING_EXTRUDER
 
 #if ENABLED(G38_PROBE_TARGET)

Marlin/enum.h

   MeasureTemp_2,
   PrepareTemp_3,
   MeasureTemp_3,
+  PrepareTemp_4,
+  MeasureTemp_4,
   Prepare_FILWIDTH,
   Measure_FILWIDTH,
   StartupDelay // Startup, delay initial temp reading a tiny bit so the hardware can settle

Marlin/language.h

 #define MSG_H2 "2"
 #define MSG_H3 "3"
 #define MSG_H4 "4"
+#define MSG_H5 "5"
 #define MSG_N1 " 1"
 #define MSG_N2 " 2"
 #define MSG_N3 " 3"
 #define MSG_N4 " 4"
+#define MSG_N5 " 5"
 #define MSG_E1 "E1"
 #define MSG_E2 "E2"
 #define MSG_E3 "E3"
 #define MSG_E4 "E4"
+#define MSG_E5 "E5"
 #define MSG_MOVE_E1 "1"
 #define MSG_MOVE_E2 "2"
 #define MSG_MOVE_E3 "3"
 #define MSG_MOVE_E4 "4"
+#define MSG_MOVE_E5 "5"
 #define MSG_DIAM_E1 " 1"
 #define MSG_DIAM_E2 " 2"
 #define MSG_DIAM_E3 " 3"
 #define MSG_DIAM_E4 " 4"
+#define MSG_DIAM_E5 " 5"
 
 #include INCLUDE_LANGUAGE
 

Marlin/macros.h

 
 #define CEILING(x,y) (((x) + (y) - 1) / (y))
 
-#define MIN3(a, b, c)    min(min(a, b), c)
-#define MIN4(a, b, c, d) min(min(a, b), min(c, d))
-#define MAX3(a, b, c)    max(max(a, b), c)
-#define MAX4(a, b, c, d) max(max(a, b), max(c, d))
+#define MIN3(a, b, c)       min(min(a, b), c)
+#define MIN4(a, b, c, d)    min(MIN3(a, b, c), d)
+#define MIN5(a, b, c, d, e) min(MIN4(a, b, c, d), e)
+#define MAX3(a, b, c)       max(max(a, b), c)
+#define MAX4(a, b, c, d)    max(MAX3(a, b, c), d)
+#define MAX5(a, b, c, d, e) max(MAX4(a, b, c, d), e)
 
 #define UNEAR_ZERO(x) ((x) < 0.000001)
 #define NEAR_ZERO(x) WITHIN(x, -0.000001, 0.000001)

Marlin/pins.h

 #ifndef TEMP_3_PIN
   #define TEMP_3_PIN -1
 #endif
+#ifndef TEMP_4_PIN
+  #define TEMP_4_PIN -1
+#endif
 #ifndef TEMP_BED_PIN
   #define TEMP_BED_PIN -1
 #endif
 #endif
 
 #ifndef MAX_EXTRUDERS
-  #define MAX_EXTRUDERS 4
+  #define MAX_EXTRUDERS 5
 #endif
 
 // Marlin needs to account for pins that equal -1
       #if EXTRUDERS > 4
         #undef _E4_PINS
         #define _E4_PINS E4_STEP_PIN, E4_DIR_PIN, E4_ENABLE_PIN,
-      #endif
-    #endif
-  #endif
-#endif
+      #endif // EXTRUDERS > 4
+    #endif // EXTRUDERS > 3
+  #endif // EXTRUDERS > 2
+#endif // EXTRUDERS > 1
 
 #define _H0_PINS HEATER_0_PIN, E0_AUTO_FAN_PIN, marlinAnalogInputToDigitalPin(TEMP_0_PIN),
 #define _H1_PINS
       #if HOTENDS > 4
         #undef _H4_PINS
         #define _H4_PINS HEATER_4_PIN, marlinAnalogInputToDigitalPin(TEMP_4_PIN),
-      #endif
-    #endif
-  #endif
+      #endif // HOTENDS > 4
+    #endif // HOTENDS > 3
+  #endif // HOTENDS > 2
 #elif ENABLED(MIXING_EXTRUDER)
   #undef _E1_PINS
   #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN,
       #if MIXING_STEPPERS > 4
         #undef _E4_PINS
         #define _E4_PINS E4_STEP_PIN, E4_DIR_PIN, E4_ENABLE_PIN,
-      #endif
-    #endif
-  #endif
-#endif
+      #endif // MIXING_STEPPERS > 4
+    #endif // MIXING_STEPPERS > 3
+  #endif // MIXING_STEPPERS > 2
+#endif // MIXING_STEPPERS > 1
 
 #define BED_PINS HEATER_BED_PIN, marlinAnalogInputToDigitalPin(TEMP_BED_PIN),
 

Marlin/pins_AZTEEG_X3_PRO.h

  * AZTEEG_X3_PRO (Arduino Mega) pin assignments
  */
 
+#if HOTENDS > 5 || E_STEPPERS > 5
+  #error "Azteeg X3 Pro supports up to 5 hotends / E-steppers. Comment out this line to continue."
+#endif
+
 #define BOARD_NAME "Azteeg X3 Pro"
 
 #include "pins_RAMPS.h"

Marlin/stepper_indirection.h

   #define E_STEP_WRITE(v) E0_STEP_WRITE(v)
   #define NORM_E_DIR() E0_DIR_WRITE(current_block->active_extruder ?  INVERT_E0_DIR : !INVERT_E0_DIR)
   #define  REV_E_DIR() E0_DIR_WRITE(current_block->active_extruder ? !INVERT_E0_DIR :  INVERT_E0_DIR)
+#elif EXTRUDERS > 4
+  #define E_STEP_WRITE(v) { switch (current_block->active_extruder) { case 0: E0_STEP_WRITE(v); break; case 1: E1_STEP_WRITE(v); break; case 2: E2_STEP_WRITE(v); break; case 3: E3_STEP_WRITE(v); break; case 4: E4_STEP_WRITE(v); } }
+  #define NORM_E_DIR() { switch (current_block->active_extruder) { case 0: E0_DIR_WRITE(!INVERT_E0_DIR); break; case 1: E1_DIR_WRITE(!INVERT_E1_DIR); break; case 2: E2_DIR_WRITE(!INVERT_E2_DIR); break; case 3: E3_DIR_WRITE(!INVERT_E3_DIR); break; case 4: E4_DIR_WRITE(!INVERT_E4_DIR); } }
+  #define REV_E_DIR() { switch (current_block->active_extruder) { case 0: E0_DIR_WRITE(INVERT_E0_DIR); break; case 1: E1_DIR_WRITE(INVERT_E1_DIR); break; case 2: E2_DIR_WRITE(INVERT_E2_DIR); break; case 3: E3_DIR_WRITE(INVERT_E3_DIR); break; case 4: E4_DIR_WRITE(INVERT_E4_DIR); } }
 #elif EXTRUDERS > 3
   #define E_STEP_WRITE(v) { switch (current_block->active_extruder) { case 0: E0_STEP_WRITE(v); break; case 1: E1_STEP_WRITE(v); break; case 2: E2_STEP_WRITE(v); break; case 3: E3_STEP_WRITE(v); } }
   #define NORM_E_DIR() { switch (current_block->active_extruder) { case 0: E0_DIR_WRITE(!INVERT_E0_DIR); break; case 1: E1_DIR_WRITE(!INVERT_E1_DIR); break; case 2: E2_DIR_WRITE(!INVERT_E2_DIR); break; case 3: E3_DIR_WRITE(!INVERT_E3_DIR); } }
   #endif
 #elif ENABLED(MIXING_EXTRUDER)
   #define E_STEP_WRITE(v) NOOP /* not used for mixing extruders! */
-  #if MIXING_STEPPERS > 3
+  #if MIXING_STEPPERS > 4
+    #define En_STEP_WRITE(n,v) { switch (n) { case 0: E0_STEP_WRITE(v); break; case 1: E1_STEP_WRITE(v); break; case 2: E2_STEP_WRITE(v); break; case 3: E3_STEP_WRITE(v); break; case 4: E4_STEP_WRITE(v); } }
+    #define NORM_E_DIR() { E0_DIR_WRITE(!INVERT_E0_DIR); E1_DIR_WRITE(!INVERT_E1_DIR); E2_DIR_WRITE(!INVERT_E2_DIR); E3_DIR_WRITE(!INVERT_E3_DIR); E4_DIR_WRITE(!INVERT_E4_DIR); }
+    #define REV_E_DIR()  { E0_DIR_WRITE( INVERT_E0_DIR); E1_DIR_WRITE( INVERT_E1_DIR); E2_DIR_WRITE( INVERT_E2_DIR); E3_DIR_WRITE( INVERT_E3_DIR); E4_DIR_WRITE( INVERT_E4_DIR); }
+  #elif MIXING_STEPPERS > 3
     #define En_STEP_WRITE(n,v) { switch (n) { case 0: E0_STEP_WRITE(v); break; case 1: E1_STEP_WRITE(v); break; case 2: E2_STEP_WRITE(v); break; case 3: E3_STEP_WRITE(v); } }
     #define NORM_E_DIR() { E0_DIR_WRITE(!INVERT_E0_DIR); E1_DIR_WRITE(!INVERT_E1_DIR); E2_DIR_WRITE(!INVERT_E2_DIR); E3_DIR_WRITE(!INVERT_E3_DIR); }
     #define REV_E_DIR()  { E0_DIR_WRITE( INVERT_E0_DIR); E1_DIR_WRITE( INVERT_E1_DIR); E2_DIR_WRITE( INVERT_E2_DIR); E3_DIR_WRITE( INVERT_E3_DIR); }

Marlin/thermistortable_20.h

   #define HEATER_3_RAW_HI_TEMP 16383
   #define HEATER_3_RAW_LO_TEMP 0
 #endif
+#if (THERMISTORHEATER_4 == 20)
+  #define HEATER_4_RAW_HI_TEMP 16383
+  #define HEATER_4_RAW_LO_TEMP 0
+#endif
 #if (THERMISTORBED == 20)
   #define HEATER_BED_RAW_HI_TEMP 16383
   #define HEATER_BED_RAW_LO_TEMP 0

Marlin/thermistortables.h

 
 #define OVERSAMPLENR 16
 
-#define ANY_THERMISTOR_IS(n) (THERMISTORHEATER_0 == n || THERMISTORHEATER_1 == n || THERMISTORHEATER_2 == n || THERMISTORHEATER_3 == n || THERMISTORBED == n)
+#define ANY_THERMISTOR_IS(n) (THERMISTORHEATER_0 == n || THERMISTORHEATER_1 == n || THERMISTORHEATER_2 == n || THERMISTORHEATER_3 == n || THERMISTORHEATER_4 == n || THERMISTORBED == n)
 
 // Pt1000 and Pt100 handling
 //
   #define HEATER_3_TEMPTABLE_LEN 0
 #endif
 
+#ifdef THERMISTORHEATER_4
+  #define HEATER_4_TEMPTABLE TT_NAME(THERMISTORHEATER_4)
+  #define HEATER_4_TEMPTABLE_LEN COUNT(HEATER_4_TEMPTABLE)
+#elif defined(HEATER_4_USES_THERMISTOR)
+  #error "No heater 4 thermistor table specified"
+#else
+  #define HEATER_4_TEMPTABLE NULL
+  #define HEATER_4_TEMPTABLE_LEN 0
+#endif
+
 #ifdef THERMISTORBED
   #define BEDTEMPTABLE TT_NAME(THERMISTORBED)
   #define BEDTEMPTABLE_LEN COUNT(BEDTEMPTABLE)