Clean up comments and spacing

Marlin/Marlin.ino

@@ -1,30 +1,30 @@
-/* -*- c++ -*- */
+/**
-
+ * Marlin Firmware
-/*
+ *
-    Reprap firmware based on Sprinter and grbl.
+ * Based on Sprinter and grbl.
- Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
-
+ *
- This program is free software: you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
+ * it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
+ * (at your option) any later version.
-
+ *
- This program is distributed in the hope that it will be useful,
+ * This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- GNU General Public License for more details.
+ * GNU General Public License for more details.
-
+ *
- You should have received a copy of the GNU General Public License
+ * You should have received a copy of the GNU General Public License
- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
+ *
-
+ * About Marlin
-/*
+ *
- This firmware is a mashup between Sprinter and grbl.
+ * This firmware is a mashup between Sprinter and grbl.
-  (https://github.com/kliment/Sprinter)
+ *  - https://github.com/kliment/Sprinter
-  (https://github.com/simen/grbl/tree)
+ *  - https://github.com/simen/grbl/tree
-
+ *
- It has preliminary support for Matthew Roberts advance algorithm
+ * It has preliminary support for Matthew Roberts advance algorithm
-    http://reprap.org/pipermail/reprap-dev/2011-May/003323.html
+ *  - http://reprap.org/pipermail/reprap-dev/2011-May/003323.html
  */
 
 /* All the implementation is done in *.cpp files to get better compatibility with avr-gcc without the Arduino IDE */

Marlin/Marlin_main.cpp

@@ -3805,7 +3805,7 @@ inline void gcode_M81() {
 inline void gcode_M82() { axis_relative_modes[E_AXIS] = false; }
 
 /**
- * M82: Set E codes relative while in Absolute Coordinates (G90) mode
+ * M83: Set E codes relative while in Absolute Coordinates (G90) mode
  */
 inline void gcode_M83() { axis_relative_modes[E_AXIS] = true; }
 
@@ -6153,6 +6153,9 @@ void mesh_plan_buffer_line(float x, float y, float z, const float e, float feed_
 
 /**
  * Prepare a single move and get ready for the next one
+ *
+ * (This may call plan_buffer_line several times to put
+ *  smaller moves into the planner for DELTA or SCARA.)
  */
 void prepare_move() {
   clamp_to_software_endstops(destination);

Marlin/pins_SANGUINOLOLU_11.h

@@ -50,18 +50,15 @@
 
 #ifdef NUM_SERVOS
   #define SERVO0_PIN          -1
-
   #if NUM_SERVOS > 1
     #define SERVO1_PIN        -1
-  #endif
-
     #if NUM_SERVOS > 2
       #define SERVO2_PIN      -1
-  #endif
-
       #if NUM_SERVOS > 3
         #define SERVO3_PIN    -1
       #endif
+    #endif
+  #endif
 #endif
 
 #define PS_ON_PIN          -1

Marlin/servo.cpp

@@ -101,29 +101,29 @@ static inline void handle_interrupts(timer16_Sequence_t timer, volatile uint16_t
 #ifndef WIRING // Wiring pre-defines signal handlers so don't define any if compiling for the Wiring platform
 
   // Interrupt handlers for Arduino
-  #if defined(_useTimer1)
+  #ifdef _useTimer1
     SIGNAL (TIMER1_COMPA_vect) { handle_interrupts(_timer1, &TCNT1, &OCR1A); }
   #endif
 
-  #if defined(_useTimer3)
+  #ifdef _useTimer3
     SIGNAL (TIMER3_COMPA_vect) { handle_interrupts(_timer3, &TCNT3, &OCR3A); }
   #endif
 
-  #if defined(_useTimer4)
+  #ifdef _useTimer4
     SIGNAL (TIMER4_COMPA_vect) { handle_interrupts(_timer4, &TCNT4, &OCR4A); }
   #endif
 
-  #if defined(_useTimer5)
+  #ifdef _useTimer5
     SIGNAL (TIMER5_COMPA_vect) { handle_interrupts(_timer5, &TCNT5, &OCR5A); }
   #endif
 
 #else //!WIRING
 
   // Interrupt handlers for Wiring
-  #if defined(_useTimer1)
+  #ifdef _useTimer1
     void Timer1Service() { handle_interrupts(_timer1, &TCNT1, &OCR1A); }
   #endif
-  #if defined(_useTimer3)
+  #ifdef _useTimer3
     void Timer3Service() { handle_interrupts(_timer3, &TCNT3, &OCR3A); }
   #endif
 
@@ -131,7 +131,7 @@ static inline void handle_interrupts(timer16_Sequence_t timer, volatile uint16_t
 
 
 static void initISR(timer16_Sequence_t timer) {
-  #if defined(_useTimer1)
+  #ifdef _useTimer1
     if (timer == _timer1) {
       TCCR1A = 0;             // normal counting mode
       TCCR1B = _BV(CS11);     // set prescaler of 8
@@ -144,31 +144,31 @@ static void initISR(timer16_Sequence_t timer) {
         TIFR1 |= _BV(OCF1A);     // clear any pending interrupts;
         TIMSK1 |= _BV(OCIE1A);   // enable the output compare interrupt
       #endif
-      #if defined(WIRING)
+      #ifdef WIRING
         timerAttach(TIMER1OUTCOMPAREA_INT, Timer1Service);
       #endif
     }
   #endif
 
-  #if defined(_useTimer3)
+  #ifdef _useTimer3
     if (timer == _timer3) {
       TCCR3A = 0;             // normal counting mode
       TCCR3B = _BV(CS31);     // set prescaler of 8
       TCNT3 = 0;              // clear the timer count
-      #if defined(__AVR_ATmega128__)
+      #ifdef __AVR_ATmega128__
         TIFR |= _BV(OCF3A);     // clear any pending interrupts;
       	ETIMSK |= _BV(OCIE3A);  // enable the output compare interrupt
       #else
         TIFR3 = _BV(OCF3A);     // clear any pending interrupts;
         TIMSK3 =  _BV(OCIE3A) ; // enable the output compare interrupt
       #endif
-      #if defined(WIRING)
+      #ifdef WIRING
         timerAttach(TIMER3OUTCOMPAREA_INT, Timer3Service);  // for Wiring platform only
       #endif
     }
   #endif
 
-  #if defined(_useTimer4)
+  #ifdef _useTimer4
     if (timer == _timer4) {
       TCCR4A = 0;             // normal counting mode
       TCCR4B = _BV(CS41);     // set prescaler of 8
@@ -178,7 +178,7 @@ static void initISR(timer16_Sequence_t timer) {
     }
   #endif
 
-  #if defined(_useTimer5)
+  #ifdef _useTimer5
     if (timer == _timer5) {
       TCCR5A = 0;             // normal counting mode
       TCCR5B = _BV(CS51);     // set prescaler of 8
@@ -191,7 +191,7 @@ static void initISR(timer16_Sequence_t timer) {
 
 static void finISR(timer16_Sequence_t timer) {
   // Disable use of the given timer
-  #if defined(WIRING)
+  #ifdef WIRING
     if (timer == _timer1) {
       #if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
         TIMSK1