Minor code cleanup, move NUM_AXIS out of config

Marlin/Configuration.h

@@ -529,8 +529,10 @@ const bool Z_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the logic
   //#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {50*60, 50*60, 4*60, 0}  // set the homing speeds (mm/min)
 
 // default settings

Marlin/Marlin.h

@@ -94,17 +94,14 @@ void serial_echopair_P(const char *s_P, unsigned long v);
 
 
 // Things to write to serial from Program memory. Saves 400 to 2k of RAM.
-FORCE_INLINE void serialprintPGM(const char *str)
-{
+FORCE_INLINE void serialprintPGM(const char *str) {
   char ch = pgm_read_byte(str);
-  while(ch)
-  {
+  while(ch) {
     MYSERIAL.write(ch);
     ch = pgm_read_byte(++str);
   }
 }
 
-
 void get_command();
 void process_commands();
 
@@ -179,8 +176,18 @@ void manage_inactivity(bool ignore_stepper_queue=false);
   #define disable_e3() /* nothing */
 #endif
 
+/**
+ * The axis order in all axis related arrays is X, Y, Z, E
+ */
+#define NUM_AXIS 4
+
+/**
+ * Axis indices as enumerated constants
+ *
+ * A_AXIS and B_AXIS are used by COREXY printers
+ * X_HEAD and Y_HEAD is used for systems that don't have a 1:1 relationship between X_AXIS and X Head movement, like CoreXY bots.
+ */
 enum AxisEnum {X_AXIS=0, Y_AXIS=1, A_AXIS=0, B_AXIS=1, Z_AXIS=2, E_AXIS=3, X_HEAD=4, Y_HEAD=5};
-//X_HEAD and Y_HEAD is used for systems that don't have a 1:1 relationship between X_AXIS and X Head movement, like CoreXY bots.
 
 void FlushSerialRequestResend();
 void ClearToSend();
@@ -224,7 +231,7 @@ void refresh_cmd_timeout(void);
 #ifndef CRITICAL_SECTION_START
   #define CRITICAL_SECTION_START  unsigned char _sreg = SREG; cli();
   #define CRITICAL_SECTION_END    SREG = _sreg;
-#endif //CRITICAL_SECTION_START
+#endif
 
 extern float homing_feedrate[];
 extern bool axis_relative_modes[];
@@ -235,6 +242,7 @@ extern float filament_size[EXTRUDERS]; // cross-sectional area of filament (in m
 extern float volumetric_multiplier[EXTRUDERS]; // reciprocal of cross-sectional area of filament (in square millimeters), stored this way to reduce computational burden in planner
 extern float current_position[NUM_AXIS];
 extern float home_offset[3];
+
 #ifdef DELTA
   extern float endstop_adj[3];
   extern float delta_radius;
@@ -244,16 +252,21 @@ extern float home_offset[3];
 #elif defined(Z_DUAL_ENDSTOPS)
   extern float z_endstop_adj;
 #endif
+
 #ifdef SCARA
   extern float axis_scaling[3];  // Build size scaling
 #endif
+
 extern float min_pos[3];
 extern float max_pos[3];
 extern bool axis_known_position[3];
+
 #ifdef ENABLE_AUTO_BED_LEVELING
   extern float zprobe_zoffset;
 #endif
+
 extern int fanSpeed;
+
 #ifdef BARICUDA
   extern int ValvePressure;
   extern int EtoPPressure;

Marlin/configurator/config/Configuration.h

@@ -553,8 +553,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic o
 
 // @section movement
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {50*60, 50*60, 4*60, 0}  // set the homing speeds (mm/min)
 
 // default settings

Marlin/example_configurations/Felix/Configuration.h

@@ -499,8 +499,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   //#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {50*60, 50*60, 4*60, 0}  // set the homing speeds (mm/min)
 
 // default settings

Marlin/example_configurations/Felix/Configuration_DUAL.h

@@ -499,8 +499,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   //#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {50*60, 50*60, 4*60, 0}  // set the homing speeds (mm/min)
 
 // default settings

Marlin/example_configurations/Hephestos/Configuration.h

@@ -522,8 +522,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   //#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {2000, 2000, 150, 0}  // set the homing speeds (mm/min)
 
 // default settings

Marlin/example_configurations/K8200/Configuration.h

@@ -527,8 +527,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   //#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {50*60, 50*60, 4*60, 0}  // set the homing speeds (mm/min)
 
 // default settings

Marlin/example_configurations/SCARA/Configuration.h

@@ -551,8 +551,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   #define MANUAL_Z_HOME_POS 0.1  // Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {40*60, 40*60, 10*60, 0}  // set the homing speeds (mm/min)
 
 // default settings

Marlin/example_configurations/WITBOX/Configuration.h

@@ -521,8 +521,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   //#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {120*60, 120*60, 7.2*60, 0}  // set the homing speeds (mm/min)
 
 // default settings

Marlin/example_configurations/delta/generic/Configuration.h

@@ -566,8 +566,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   #define MANUAL_Z_HOME_POS 250 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 
 // delta homing speeds must be the same on xyz
 #define HOMING_FEEDRATE {200*60, 200*60, 200*60, 0}  // set the homing speeds (mm/min)

Marlin/example_configurations/delta/kossel_mini/Configuration.h

@@ -570,8 +570,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic o
   #define MANUAL_Z_HOME_POS 250 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 
 // delta homing speeds must be the same on xyz
 #define HOMING_FEEDRATE {200*60, 200*60, 200*60, 0}  // set the homing speeds (mm/min)

Marlin/example_configurations/makibox/Configuration.h

@@ -519,8 +519,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   //#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {1500, 1500, 120, 0}  // set the homing speeds (mm/min)   ***** MakiBox A6 *****
 
 // default settings

Marlin/example_configurations/tvrrug/Round2/Configuration.h

@@ -521,8 +521,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   //#define MANUAL_Z_HOME_POS 402 // For delta: Distance between nozzle and print surface after homing.
 #endif
 
-//// MOVEMENT SETTINGS
-#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
+/**
+ * MOVEMENT SETTINGS
+ */
+
 #define HOMING_FEEDRATE {50*60, 50*60, 4*60, 0}  // set the homing speeds (mm/min)
 
 // default settings