Revert and extend previous change pin check change

Reviert previous change of #if BLAH_PIN > 0 to #if defined(BLAH_PIN) && BLAH_PIN > -1. Unfortunately some times pin 0 is used. For my sins I've gone through and replaced all unsafe checks of #if BLAH_PIN > -1 with the safe version.
12 years ago · 40eb07bad4
parent 440cf2bc10
commit 40eb07bad4
7 changed files with 135 additions and 133 deletions
--- a/Marlin/Marlin.h
+++ b/Marlin/Marlin.h
@ -96,7 +96,7 @@ void process_commands();

 void manage_inactivity();

-#if X_ENABLE_PIN > -1
+#if defined(X_ENABLE_PIN) && X_ENABLE_PIN > -1
  #define  enable_x() WRITE(X_ENABLE_PIN, X_ENABLE_ON)
  #define disable_x() WRITE(X_ENABLE_PIN,!X_ENABLE_ON)
 #else
@ -104,7 +104,7 @@ void manage_inactivity();
  #define disable_x() ;
 #endif

-#if Y_ENABLE_PIN > -1
+#if defined(Y_ENABLE_PIN) && Y_ENABLE_PIN > -1
  #define  enable_y() WRITE(Y_ENABLE_PIN, Y_ENABLE_ON)
  #define disable_y() WRITE(Y_ENABLE_PIN,!Y_ENABLE_ON)
 #else
@ -112,7 +112,7 @@ void manage_inactivity();
  #define disable_y() ;
 #endif

-#if Z_ENABLE_PIN > -1
+#if defined(Z_ENABLE_PIN) && Z_ENABLE_PIN > -1
  #ifdef Z_DUAL_STEPPER_DRIVERS
    #define  enable_z() { WRITE(Z_ENABLE_PIN, Z_ENABLE_ON); WRITE(Z2_ENABLE_PIN, Z_ENABLE_ON); }
    #define disable_z() { WRITE(Z_ENABLE_PIN,!Z_ENABLE_ON); WRITE(Z2_ENABLE_PIN,!Z_ENABLE_ON); }
--- a/Marlin/Marlin.pde
+++ b/Marlin/Marlin.pde
@ -47,6 +47,6 @@
  #endif
 #endif

-#if DIGIPOTSS_PIN > -1
+#if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1
 #include <SPI.h>
 #endif
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@ -44,7 +44,7 @@
 #include "Servo.h"
 #endif

-#if DIGIPOTSS_PIN > 0
+#if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1
 #include <SPI.h>
 #endif

@ -300,7 +300,7 @@ void enquecommand_P(const char *cmd)

 void setup_killpin()
 {
-  #if( KILL_PIN>-1 )
+  #if defined(KILL_PIN) && KILL_PIN > -1
    pinMode(KILL_PIN,INPUT);
    WRITE(KILL_PIN,HIGH);
  #endif
@ -308,50 +308,44 @@ void setup_killpin()

 void setup_photpin()
 {
-  #ifdef PHOTOGRAPH_PIN
-    #if (PHOTOGRAPH_PIN > 0)
+  #if defined(PHOTOGRAPH_PIN) && PHOTOGRAPH_PIN > -1
    SET_OUTPUT(PHOTOGRAPH_PIN);
    WRITE(PHOTOGRAPH_PIN, LOW);
-    #endif
  #endif
 }

 void setup_powerhold()
 {
- #ifdef SUICIDE_PIN
-   #if (SUICIDE_PIN> 0)
-      SET_OUTPUT(SUICIDE_PIN);
-      WRITE(SUICIDE_PIN, HIGH);
-   #endif
- #endif
- #if (PS_ON_PIN > 0)
-   SET_OUTPUT(PS_ON_PIN);
-   WRITE(PS_ON_PIN, PS_ON_AWAKE);
- #endif
+  #if defined(SUICIDE_PIN) && SUICIDE_PIN > -1
+    SET_OUTPUT(SUICIDE_PIN);
+    WRITE(SUICIDE_PIN, HIGH);
+  #endif
+  #if defined(PS_ON_PIN) && PS_ON_PIN > -1
+    SET_OUTPUT(PS_ON_PIN);
+    WRITE(PS_ON_PIN, PS_ON_AWAKE);
+  #endif
 }

 void suicide()
 {
- #ifdef SUICIDE_PIN
-    #if (SUICIDE_PIN > 0)
-      SET_OUTPUT(SUICIDE_PIN);
-      WRITE(SUICIDE_PIN, LOW);
-    #endif
+  #if defined(SUICIDE_PIN) && SUICIDE_PIN > -1
+    SET_OUTPUT(SUICIDE_PIN);
+    WRITE(SUICIDE_PIN, LOW);
  #endif
 }

 void servo_init()
 {
-  #if (NUM_SERVOS >= 1) && (SERVO0_PIN > 0)
+  #if (NUM_SERVOS >= 1) && defined(SERVO0_PIN) && (SERVO0_PIN > -1)
    servos[0].attach(SERVO0_PIN);
  #endif
-  #if (NUM_SERVOS >= 2) && (SERVO1_PIN > 0)
+  #if (NUM_SERVOS >= 2) && defined(SERVO1_PIN) && (SERVO1_PIN > -1)
    servos[1].attach(SERVO1_PIN);
  #endif
-  #if (NUM_SERVOS >= 3) && (SERVO2_PIN > 0)
+  #if (NUM_SERVOS >= 3) && defined(SERVO2_PIN) && (SERVO2_PIN > -1)
    servos[2].attach(SERVO2_PIN);
  #endif
-  #if (NUM_SERVOS >= 4) && (SERVO3_PIN > 0)
+  #if (NUM_SERVOS >= 4) && defined(SERVO3_PIN) && (SERVO3_PIN > -1)
    servos[3].attach(SERVO3_PIN);
  #endif
  #if (NUM_SERVOS >= 5)
@ -411,7 +405,7 @@ void setup()

  lcd_init();
  
-  #if CONTROLLERFAN_PIN > 0
+  #if defined(CONTROLLERFAN_PIN) && CONTROLLERFAN_PIN > -1
    SET_OUTPUT(CONTROLLERFAN_PIN); //Set pin used for driver cooling fan
  #endif 
 }
@ -669,7 +663,7 @@ static void axis_is_at_home(int axis) {

 static void homeaxis(int axis) {
 #define HOMEAXIS_DO(LETTER) \
-  ((LETTER##_MIN_PIN > 0 && LETTER##_HOME_DIR==-1) || (LETTER##_MAX_PIN > 0 && LETTER##_HOME_DIR==1))
+  ((LETTER##_MIN_PIN > -1 && LETTER##_HOME_DIR==-1) || (LETTER##_MAX_PIN > -1 && LETTER##_HOME_DIR==1))

  if (axis==X_AXIS ? HOMEAXIS_DO(X) :
      axis==Y_AXIS ? HOMEAXIS_DO(Y) :
@ -1036,7 +1030,7 @@ void process_commands()
            break;
          }
        }
-      #if FAN_PIN > 0
+      #if defined(FAN_PIN) && FAN_PIN > -1
        if (pin_number == FAN_PIN)
          fanSpeed = pin_status;
      #endif
@ -1062,12 +1056,12 @@ void process_commands()
      if(setTargetedHotend(105)){
        break;
      }
-      #if (TEMP_0_PIN > 0)
+      #if defined(TEMP_0_PIN) && TEMP_0_PIN > -1
        SERIAL_PROTOCOLPGM("ok T:");
        SERIAL_PROTOCOL_F(degHotend(tmp_extruder),1);
        SERIAL_PROTOCOLPGM(" /");
        SERIAL_PROTOCOL_F(degTargetHotend(tmp_extruder),1);
-        #if TEMP_BED_PIN > 0
+        #if defined(TEMP_BED_PIN) && TEMP_BED_PIN > -1
          SERIAL_PROTOCOLPGM(" B:");
          SERIAL_PROTOCOL_F(degBed(),1);
          SERIAL_PROTOCOLPGM(" /");
@ -1165,7 +1159,7 @@ void process_commands()
      }
      break;
    case 190: // M190 - Wait for bed heater to reach target.
-    #if TEMP_BED_PIN > 0
+    #if defined(TEMP_BED_PIN) && TEMP_BED_PIN > -1
        LCD_MESSAGEPGM(MSG_BED_HEATING);
        if (code_seen('S')) setTargetBed(code_value());
        codenum = millis();
@ -1192,7 +1186,7 @@ void process_commands()
    #endif
        break;

-    #if FAN_PIN > 0
+    #if defined(FAN_PIN) && FAN_PIN > -1
      case 106: //M106 Fan On
        if (code_seen('S')){
           fanSpeed=constrain(code_value(),0,255);
@ -1207,7 +1201,7 @@ void process_commands()
    #endif //FAN_PIN
    #ifdef BARICUDA
      // PWM for HEATER_1_PIN
-      #if HEATER_1_PIN > 0
+      #if defined(HEATER_1_PIN) && HEATER_1_PIN > -1
        case 126: //M126 valve open
          if (code_seen('S')){
             ValvePressure=constrain(code_value(),0,255);
@ -1222,7 +1216,7 @@ void process_commands()
      #endif //HEATER_1_PIN

      // PWM for HEATER_2_PIN
-      #if HEATER_2_PIN > 0
+      #if defined(HEATER_2_PIN) && HEATER_2_PIN > -1
        case 128: //M128 valve open
          if (code_seen('S')){
             EtoPPressure=constrain(code_value(),0,255);
@ -1237,7 +1231,7 @@ void process_commands()
      #endif //HEATER_2_PIN
    #endif

-    #if (PS_ON_PIN > 0)
+    #if defined(PS_ON_PIN) && PS_ON_PIN > -1
      case 80: // M80 - ATX Power On
        SET_OUTPUT(PS_ON_PIN); //GND
        WRITE(PS_ON_PIN, PS_ON_AWAKE);
@ -1246,10 +1240,10 @@ void process_commands()

      case 81: // M81 - ATX Power Off

-      #if defined SUICIDE_PIN && SUICIDE_PIN > 0
+      #if defined(SUICIDE_PIN) && SUICIDE_PIN > -1
        st_synchronize();
        suicide();
-      #elif (PS_ON_PIN > 0)
+      #elif defined(PS_ON_PIN) && PS_ON_PIN > -1
        SET_OUTPUT(PS_ON_PIN);
        WRITE(PS_ON_PIN, PS_ON_ASLEEP);
      #endif
@ -1354,27 +1348,27 @@ void process_commands()
      break;
    case 119: // M119
    SERIAL_PROTOCOLLN(MSG_M119_REPORT);
-      #if (X_MIN_PIN > 0)
+      #if defined(X_MIN_PIN) && X_MIN_PIN > -1
        SERIAL_PROTOCOLPGM(MSG_X_MIN);
        SERIAL_PROTOCOLLN(((READ(X_MIN_PIN)^X_ENDSTOPS_INVERTING)?MSG_ENDSTOP_HIT:MSG_ENDSTOP_OPEN));
      #endif
-      #if (X_MAX_PIN > 0)
+      #if defined(X_MAX_PIN) && X_MAX_PIN > -1
        SERIAL_PROTOCOLPGM(MSG_X_MAX);
        SERIAL_PROTOCOLLN(((READ(X_MAX_PIN)^X_ENDSTOPS_INVERTING)?MSG_ENDSTOP_HIT:MSG_ENDSTOP_OPEN));
      #endif
-      #if (Y_MIN_PIN > 0)
+      #if defined(Y_MIN_PIN) && Y_MIN_PIN > -1
        SERIAL_PROTOCOLPGM(MSG_Y_MIN);
        SERIAL_PROTOCOLLN(((READ(Y_MIN_PIN)^Y_ENDSTOPS_INVERTING)?MSG_ENDSTOP_HIT:MSG_ENDSTOP_OPEN));
      #endif
-      #if (Y_MAX_PIN > 0)
+      #if defined(Y_MAX_PIN) && Y_MAX_PIN > -1
        SERIAL_PROTOCOLPGM(MSG_Y_MAX);
        SERIAL_PROTOCOLLN(((READ(Y_MAX_PIN)^Y_ENDSTOPS_INVERTING)?MSG_ENDSTOP_HIT:MSG_ENDSTOP_OPEN));
      #endif
-      #if (Z_MIN_PIN > 0)
+      #if defined(Z_MIN_PIN) && Z_MIN_PIN > -1
        SERIAL_PROTOCOLPGM(MSG_Z_MIN);
        SERIAL_PROTOCOLLN(((READ(Z_MIN_PIN)^Z_ENDSTOPS_INVERTING)?MSG_ENDSTOP_HIT:MSG_ENDSTOP_OPEN));
      #endif
-      #if (Z_MAX_PIN > 0)
+      #if defined(Z_MAX_PIN) && Z_MAX_PIN > -1
        SERIAL_PROTOCOLPGM(MSG_Z_MAX);
        SERIAL_PROTOCOLLN(((READ(Z_MAX_PIN)^Z_ENDSTOPS_INVERTING)?MSG_ENDSTOP_HIT:MSG_ENDSTOP_OPEN));
      #endif
@ -1612,8 +1606,7 @@ void process_commands()
    #endif //PIDTEMP
    case 240: // M240  Triggers a camera by emulating a Canon RC-1 : http://www.doc-diy.net/photo/rc-1_hacked/
     {
-      #ifdef PHOTOGRAPH_PIN
-        #if (PHOTOGRAPH_PIN > 0)
+      #if defined(PHOTOGRAPH_PIN) && PHOTOGRAPH_PIN > -1
        const uint8_t NUM_PULSES=16;
        const float PULSE_LENGTH=0.01524;
        for(int i=0; i < NUM_PULSES; i++) {
@ -1629,7 +1622,6 @@ void process_commands()
          WRITE(PHOTOGRAPH_PIN, LOW);
          _delay_ms(PULSE_LENGTH);
        }
-        #endif
      #endif
     }
    break;
@ -1811,7 +1803,7 @@ void process_commands()
    #endif //FILAMENTCHANGEENABLE
    case 907: // M907 Set digital trimpot motor current using axis codes.
    {
-      #if DIGIPOTSS_PIN > 0
+      #if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1
        for(int i=0;i<NUM_AXIS;i++) if(code_seen(axis_codes[i])) digipot_current(i,code_value());
        if(code_seen('B')) digipot_current(4,code_value());
        if(code_seen('S')) for(int i=0;i<=4;i++) digipot_current(i,code_value());
@ -1820,7 +1812,7 @@ void process_commands()
    break;
    case 908: // M908 Control digital trimpot directly.
    {
-      #if DIGIPOTSS_PIN > 0
+      #if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1
        uint8_t channel,current;
        if(code_seen('P')) channel=code_value();
        if(code_seen('S')) current=code_value();
@ -1830,7 +1822,7 @@ void process_commands()
    break;
    case 350: // M350 Set microstepping mode. Warning: Steps per unit remains unchanged. S code sets stepping mode for all drivers.
    {
-      #if X_MS1_PIN > 0
+      #if defined(X_MS1_PIN) && X_MS1_PIN > -1
        if(code_seen('S')) for(int i=0;i<=4;i++) microstep_mode(i,code_value());
        for(int i=0;i<NUM_AXIS;i++) if(code_seen(axis_codes[i])) microstep_mode(i,(uint8_t)code_value());
        if(code_seen('B')) microstep_mode(4,code_value());
@ -1840,7 +1832,7 @@ void process_commands()
    break;
    case 351: // M351 Toggle MS1 MS2 pins directly, S# determines MS1 or MS2, X# sets the pin high/low.
    {
-      #if X_MS1_PIN > 0
+      #if defined(X_MS1_PIN) && X_MS1_PIN > -1
      if(code_seen('S')) switch((int)code_value())
      {
        case 1:
@ -2064,10 +2056,12 @@ void prepare_arc_move(char isclockwise) {
  previous_millis_cmd = millis();
 }

-#if CONTROLLERFAN_PIN > 0
+#if defined(CONTROLLERFAN_PIN) && CONTROLLERFAN_PIN > -1

-#if CONTROLLERFAN_PIN == FAN_PIN 
-   #error "You cannot set CONTROLLERFAN_PIN equal to FAN_PIN"
+#if defined(FAN_PIN)
+  #if CONTROLLERFAN_PIN == FAN_PIN 
+    #error "You cannot set CONTROLLERFAN_PIN equal to FAN_PIN"
+  #endif
 #endif  

 unsigned long lastMotor = 0; //Save the time for when a motor was turned on last
@ -2124,11 +2118,11 @@ void manage_inactivity()
      }
    }
  }
-  #if KILL_PIN > 0
+  #if defined(KILL_PIN) && KILL_PIN > -1
    if( 0 == READ(KILL_PIN) )
      kill();
  #endif
-  #if CONTROLLERFAN_PIN > 0
+  #if defined(CONTROLLERFAN_PIN) && CONTROLLERFAN_PIN > -1
    controllerFan(); //Check if fan should be turned on to cool stepper drivers down
  #endif
  #ifdef EXTRUDER_RUNOUT_PREVENT
@ -2165,7 +2159,9 @@ void kill()
  disable_e1();
  disable_e2();

-  if(PS_ON_PIN > 0) pinMode(PS_ON_PIN,INPUT);
+#if defined(PS_ON_PIN) && PS_ON_PIN > -1
+  pinMode(PS_ON_PIN,INPUT);
+#endif  
  SERIAL_ERROR_START;
  SERIAL_ERRORLNPGM(MSG_ERR_KILLED);
  LCD_ALERTMESSAGEPGM(MSG_KILLED);
--- a/Marlin/dogm_lcd_implementation.h
+++ b/Marlin/dogm_lcd_implementation.h
@ -279,7 +279,7 @@ static void lcd_implementation_status_screen()
 // Fan
 u8g.setFont(FONT_STATUSMENU);
 u8g.setPrintPos(104,27);
- #if FAN_PIN > 0
+ #if defined(FAN_PIN) && FAN_PIN > -1
 u8g.print(itostr3(int((fanSpeed*100)/256 + 1)));
 u8g.print("%");
 #else
--- a/Marlin/planner.cpp
+++ b/Marlin/planner.cpp
@ -472,7 +472,7 @@ void check_axes_activity()
    disable_e1();
    disable_e2(); 
  }
-#if FAN_PIN > -1
+#if defined(FAN_PIN) && FAN_PIN > -1
  #ifndef FAN_SOFT_PWM
    #ifdef FAN_KICKSTART_TIME
      static unsigned long fan_kick_end;
@ -496,11 +496,11 @@ void check_axes_activity()
 #endif

 #ifdef BARICUDA
-  #if HEATER_1_PIN > -1
+  #if defined(HEATER_1_PIN) && HEATER_1_PIN > -1
      analogWrite(HEATER_1_PIN,tail_valve_pressure);
  #endif

-  #if HEATER_2_PIN > -1
+  #if defined(HEATER_2_PIN) && HEATER_2_PIN > -1
      analogWrite(HEATER_2_PIN,tail_e_to_p_pressure);
  #endif
 #endif
--- a/Marlin/stepper.cpp
+++ b/Marlin/stepper.cpp
@ -29,7 +29,7 @@
 #include "language.h"
 #include "cardreader.h"
 #include "speed_lookuptable.h"
-#if DIGIPOTSS_PIN > -1
+#if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1
 #include <SPI.h>
 #endif

@ -353,7 +353,7 @@ ISR(TIMER1_COMPA_vect)
      count_direction[X_AXIS]=-1;
      CHECK_ENDSTOPS
      {
-        #if X_MIN_PIN > -1
+        #if defined(X_MIN_PIN) && X_MIN_PIN > -1
          bool x_min_endstop=(READ(X_MIN_PIN) != X_ENDSTOPS_INVERTING);
          if(x_min_endstop && old_x_min_endstop && (current_block->steps_x > 0)) {
            endstops_trigsteps[X_AXIS] = count_position[X_AXIS];
@ -372,7 +372,7 @@ ISR(TIMER1_COMPA_vect)
      count_direction[X_AXIS]=1;
      CHECK_ENDSTOPS 
      {
-        #if X_MAX_PIN > -1
+        #if defined(X_MAX_PIN) && X_MAX_PIN > -1
          bool x_max_endstop=(READ(X_MAX_PIN) != X_ENDSTOPS_INVERTING);
          if(x_max_endstop && old_x_max_endstop && (current_block->steps_x > 0)){
            endstops_trigsteps[X_AXIS] = count_position[X_AXIS];
@ -391,7 +391,7 @@ ISR(TIMER1_COMPA_vect)
      count_direction[Y_AXIS]=-1;
      CHECK_ENDSTOPS
      {
-        #if Y_MIN_PIN > -1
+        #if defined(Y_MIN_PIN) && Y_MIN_PIN > -1
          bool y_min_endstop=(READ(Y_MIN_PIN) != Y_ENDSTOPS_INVERTING);
          if(y_min_endstop && old_y_min_endstop && (current_block->steps_y > 0)) {
            endstops_trigsteps[Y_AXIS] = count_position[Y_AXIS];
@ -409,7 +409,7 @@ ISR(TIMER1_COMPA_vect)
      count_direction[Y_AXIS]=1;
      CHECK_ENDSTOPS
      {
-        #if Y_MAX_PIN > -1
+        #if defined(Y_MAX_PIN) && Y_MAX_PIN > -1
          bool y_max_endstop=(READ(Y_MAX_PIN) != Y_ENDSTOPS_INVERTING);
          if(y_max_endstop && old_y_max_endstop && (current_block->steps_y > 0)){
            endstops_trigsteps[Y_AXIS] = count_position[Y_AXIS];
@ -452,7 +452,7 @@ ISR(TIMER1_COMPA_vect)
      count_direction[Z_AXIS]=-1;
      CHECK_ENDSTOPS
      {
-        #if Z_MIN_PIN > -1
+        #if defined(Z_MIN_PIN) && Z_MIN_PIN > -1
          bool z_min_endstop=(READ(Z_MIN_PIN) != Z_ENDSTOPS_INVERTING);
          if(z_min_endstop && old_z_min_endstop && (current_block->steps_z > 0)) {
            endstops_trigsteps[Z_AXIS] = count_position[Z_AXIS];
@ -473,7 +473,7 @@ ISR(TIMER1_COMPA_vect)
      count_direction[Z_AXIS]=1;
      CHECK_ENDSTOPS
      {
-        #if Z_MAX_PIN > -1
+        #if defined(Z_MAX_PIN) && Z_MAX_PIN > -1
          bool z_max_endstop=(READ(Z_MAX_PIN) != Z_ENDSTOPS_INVERTING);
          if(z_max_endstop && old_z_max_endstop && (current_block->steps_z > 0)) {
            endstops_trigsteps[Z_AXIS] = count_position[Z_AXIS];
@ -743,20 +743,20 @@ void st_init()
  microstep_init(); //Initialize Microstepping Pins
  
  //Initialize Dir Pins
-  #if X_DIR_PIN > -1
+  #if defined(X_DIR_PIN) && X_DIR_PIN > -1
    SET_OUTPUT(X_DIR_PIN);
  #endif
-  #if Y_DIR_PIN > -1 
+  #if defined(Y_DIR_PIN) && Y_DIR_PIN > -1 
    SET_OUTPUT(Y_DIR_PIN);
  #endif
-  #if Z_DIR_PIN > -1 
+  #if defined(Z_DIR_PIN) && Z_DIR_PIN > -1 
    SET_OUTPUT(Z_DIR_PIN);

-    #if defined(Z_DUAL_STEPPER_DRIVERS) && (Z2_DIR_PIN > -1)
+    #if defined(Z_DUAL_STEPPER_DRIVERS) && defined(Z2_DIR_PIN) && (Z2_DIR_PIN > -1)
      SET_OUTPUT(Z2_DIR_PIN);
    #endif
  #endif
-  #if E0_DIR_PIN > -1 
+  #if defined(E0_DIR_PIN) && E0_DIR_PIN > -1 
    SET_OUTPUT(E0_DIR_PIN);
  #endif
  #if defined(E1_DIR_PIN) && (E1_DIR_PIN > -1)
@ -768,24 +768,24 @@ void st_init()

  //Initialize Enable Pins - steppers default to disabled.

-  #if (X_ENABLE_PIN > -1)
+  #if defined(X_ENABLE_PIN) && X_ENABLE_PIN > -1
    SET_OUTPUT(X_ENABLE_PIN);
    if(!X_ENABLE_ON) WRITE(X_ENABLE_PIN,HIGH);
  #endif
-  #if (Y_ENABLE_PIN > -1)
+  #if defined(Y_ENABLE_PIN) && Y_ENABLE_PIN > -1
    SET_OUTPUT(Y_ENABLE_PIN);
    if(!Y_ENABLE_ON) WRITE(Y_ENABLE_PIN,HIGH);
  #endif
-  #if (Z_ENABLE_PIN > -1)
+  #if defined(Z_ENABLE_PIN) && Z_ENABLE_PIN > -1
    SET_OUTPUT(Z_ENABLE_PIN);
    if(!Z_ENABLE_ON) WRITE(Z_ENABLE_PIN,HIGH);
    
-    #if defined(Z_DUAL_STEPPER_DRIVERS) && (Z2_ENABLE_PIN > -1)
+    #if defined(Z_DUAL_STEPPER_DRIVERS) && defined(Z2_ENABLE_PIN) && (Z2_ENABLE_PIN > -1)
      SET_OUTPUT(Z2_ENABLE_PIN);
      if(!Z_ENABLE_ON) WRITE(Z2_ENABLE_PIN,HIGH);
    #endif
  #endif
-  #if (E0_ENABLE_PIN > -1)
+  #if defined(E0_ENABLE_PIN) && (E0_ENABLE_PIN > -1)
    SET_OUTPUT(E0_ENABLE_PIN);
    if(!E_ENABLE_ON) WRITE(E0_ENABLE_PIN,HIGH);
  #endif
@ -800,42 +800,42 @@ void st_init()

  //endstops and pullups
  
-  #if X_MIN_PIN > -1
+  #if defined(X_MIN_PIN) && X_MIN_PIN > -1
    SET_INPUT(X_MIN_PIN); 
    #ifdef ENDSTOPPULLUP_XMIN
      WRITE(X_MIN_PIN,HIGH);
    #endif
  #endif
      
-  #if Y_MIN_PIN > -1
+  #if defined(Y_MIN_PIN) && Y_MIN_PIN > -1
    SET_INPUT(Y_MIN_PIN); 
    #ifdef ENDSTOPPULLUP_YMIN
      WRITE(Y_MIN_PIN,HIGH);
    #endif
  #endif
  
-  #if Z_MIN_PIN > -1
+  #if defined(Z_MIN_PIN) && Z_MIN_PIN > -1
    SET_INPUT(Z_MIN_PIN); 
    #ifdef ENDSTOPPULLUP_ZMIN
      WRITE(Z_MIN_PIN,HIGH);
    #endif
  #endif
      
-  #if X_MAX_PIN > -1
+  #if defined(X_MAX_PIN) && X_MAX_PIN > -1
    SET_INPUT(X_MAX_PIN); 
    #ifdef ENDSTOPPULLUP_XMAX
      WRITE(X_MAX_PIN,HIGH);
    #endif
  #endif
      
-  #if Y_MAX_PIN > -1
+  #if defined(Y_MAX_PIN) && Y_MAX_PIN > -1
    SET_INPUT(Y_MAX_PIN); 
    #ifdef ENDSTOPPULLUP_YMAX
      WRITE(Y_MAX_PIN,HIGH);
    #endif
  #endif
  
-  #if Z_MAX_PIN > -1
+  #if defined(Z_MAX_PIN) && Z_MAX_PIN > -1
    SET_INPUT(Z_MAX_PIN); 
    #ifdef ENDSTOPPULLUP_ZMAX
      WRITE(Z_MAX_PIN,HIGH);
@ -844,26 +844,26 @@ void st_init()
 

  //Initialize Step Pins
-  #if (X_STEP_PIN > -1) 
+  #if defined(X_STEP_PIN) && (X_STEP_PIN > -1) 
    SET_OUTPUT(X_STEP_PIN);
    WRITE(X_STEP_PIN,INVERT_X_STEP_PIN);
    disable_x();
  #endif  
-  #if (Y_STEP_PIN > -1) 
+  #if defined(Y_STEP_PIN) && (Y_STEP_PIN > -1) 
    SET_OUTPUT(Y_STEP_PIN);
    WRITE(Y_STEP_PIN,INVERT_Y_STEP_PIN);
    disable_y();
  #endif  
-  #if (Z_STEP_PIN > -1) 
+  #if defined(Z_STEP_PIN) && (Z_STEP_PIN > -1) 
    SET_OUTPUT(Z_STEP_PIN);
    WRITE(Z_STEP_PIN,INVERT_Z_STEP_PIN);
-    #if defined(Z_DUAL_STEPPER_DRIVERS) && (Z2_STEP_PIN > -1)
+    #if defined(Z_DUAL_STEPPER_DRIVERS) && defined(Z2_STEP_PIN) && (Z2_STEP_PIN > -1)
      SET_OUTPUT(Z2_STEP_PIN);
      WRITE(Z2_STEP_PIN,INVERT_Z_STEP_PIN);
    #endif
    disable_z();
  #endif  
-  #if (E0_STEP_PIN > -1) 
+  #if defined(E0_STEP_PIN) && (E0_STEP_PIN > -1) 
    SET_OUTPUT(E0_STEP_PIN);
    WRITE(E0_STEP_PIN,INVERT_E_STEP_PIN);
    disable_e0();
@ -974,7 +974,7 @@ void quickStop()

 void digitalPotWrite(int address, int value) // From Arduino DigitalPotControl example
 {
-  #if DIGIPOTSS_PIN > -1
+  #if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1
    digitalWrite(DIGIPOTSS_PIN,LOW); // take the SS pin low to select the chip
    SPI.transfer(address); //  send in the address and value via SPI:
    SPI.transfer(value);
@ -985,7 +985,7 @@ void digitalPotWrite(int address, int value) // From Arduino DigitalPotControl e

 void digipot_init() //Initialize Digipot Motor Current
 {
-  #if DIGIPOTSS_PIN > -1
+  #if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1
    const uint8_t digipot_motor_current[] = DIGIPOT_MOTOR_CURRENT;
    
    SPI.begin(); 
@ -998,7 +998,7 @@ void digipot_init() //Initialize Digipot Motor Current

 void digipot_current(uint8_t driver, int current)
 {
-  #if DIGIPOTSS_PIN > -1
+  #if defined(DIGIPOTSS_PIN) && DIGIPOTSS_PIN > -1
    const uint8_t digipot_ch[] = DIGIPOT_CHANNELS;
    digitalPotWrite(digipot_ch[driver], current);
  #endif
@ -1006,7 +1006,7 @@ void digipot_current(uint8_t driver, int current)

 void microstep_init()
 {
-  #if X_MS1_PIN > -1
+  #if defined(X_MS1_PIN) && X_MS1_PIN > -1
  const uint8_t microstep_modes[] = MICROSTEP_MODES;
  pinMode(X_MS2_PIN,OUTPUT);
  pinMode(Y_MS2_PIN,OUTPUT);
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@ -99,7 +99,9 @@ static volatile bool temp_meas_ready = false;
 #ifdef FAN_SOFT_PWM
  static unsigned char soft_pwm_fan;
 #endif
-#if EXTRUDER_0_AUTO_FAN_PIN > 0 || EXTRUDER_1_AUTO_FAN_PIN > 0 || EXTRUDER_2_AUTO_FAN_PIN > 0
+#if (defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1) || \
+    (defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1) || \
+    (defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1)
  static unsigned long extruder_autofan_last_check;
 #endif  
  
@ -307,9 +309,11 @@ int getHeaterPower(int heater) {
  return soft_pwm[heater];
 }

-#if EXTRUDER_0_AUTO_FAN_PIN > 0 || EXTRUDER_1_AUTO_FAN_PIN > 0 || EXTRUDER_2_AUTO_FAN_PIN > 0
+#if (defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1) || \
+    (defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1) || \
+    (defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1)

-  #if FAN_PIN > 0
+  #if defined(FAN_PIN) && FAN_PIN > -1
    #if EXTRUDER_0_AUTO_FAN_PIN == FAN_PIN 
       #error "You cannot set EXTRUDER_0_AUTO_FAN_PIN equal to FAN_PIN"
    #endif
@ -335,11 +339,11 @@ void checkExtruderAutoFans()
  uint8_t fanState = 0;

  // which fan pins need to be turned on?      
-  #if EXTRUDER_0_AUTO_FAN_PIN > 0
+  #if defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1
    if (current_temperature[0] > EXTRUDER_AUTO_FAN_TEMPERATURE) 
      fanState |= 1;
  #endif
-  #if EXTRUDER_1_AUTO_FAN_PIN > 0
+  #if defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1
    if (current_temperature[1] > EXTRUDER_AUTO_FAN_TEMPERATURE) 
    {
      if (EXTRUDER_1_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN) 
@ -348,7 +352,7 @@ void checkExtruderAutoFans()
        fanState |= 2;
    }
  #endif
-  #if EXTRUDER_2_AUTO_FAN_PIN > 0
+  #if defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1
    if (current_temperature[2] > EXTRUDER_AUTO_FAN_TEMPERATURE) 
    {
      if (EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN) 
@ -361,14 +365,14 @@ void checkExtruderAutoFans()
  #endif
  
  // update extruder auto fan states
-  #if EXTRUDER_0_AUTO_FAN_PIN > 0
+  #if defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1
    setExtruderAutoFanState(EXTRUDER_0_AUTO_FAN_PIN, (fanState & 1) != 0);
  #endif 
-  #if EXTRUDER_1_AUTO_FAN_PIN > 0
+  #if defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1
    if (EXTRUDER_1_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN) 
      setExtruderAutoFanState(EXTRUDER_1_AUTO_FAN_PIN, (fanState & 2) != 0);
  #endif 
-  #if EXTRUDER_2_AUTO_FAN_PIN > 0
+  #if defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1
    if (EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN 
        && EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
      setExtruderAutoFanState(EXTRUDER_2_AUTO_FAN_PIN, (fanState & 4) != 0);
@ -470,7 +474,9 @@ void manage_heater()

  } // End extruder for loop

-  #if EXTRUDER_0_AUTO_FAN_PIN > 0 || EXTRUDER_1_AUTO_FAN_PIN > 0 || EXTRUDER_2_AUTO_FAN_PIN > 0
+  #if (defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1) || \
+      (defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1) || \
+      (defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1)
  if(millis() - extruder_autofan_last_check > 2500)  // only need to check fan state very infrequently
  {
    checkExtruderAutoFans();
@ -669,19 +675,19 @@ void tp_init()
 #endif //PIDTEMPBED
  }

-  #if (HEATER_0_PIN > -1) 
+  #if defined(HEATER_0_PIN) && (HEATER_0_PIN > -1) 
    SET_OUTPUT(HEATER_0_PIN);
  #endif  
-  #if (HEATER_1_PIN > -1) 
+  #if defined(HEATER_1_PIN) && (HEATER_1_PIN > -1) 
    SET_OUTPUT(HEATER_1_PIN);
  #endif  
-  #if (HEATER_2_PIN > -1) 
+  #if defined(HEATER_2_PIN) && (HEATER_2_PIN > -1) 
    SET_OUTPUT(HEATER_2_PIN);
  #endif  
-  #if (HEATER_BED_PIN > -1) 
+  #if defined(HEATER_BED_PIN) && (HEATER_BED_PIN > -1) 
    SET_OUTPUT(HEATER_BED_PIN);
  #endif  
-  #if (FAN_PIN > -1) 
+  #if defined(FAN_PIN) && (FAN_PIN > -1) 
    SET_OUTPUT(FAN_PIN);
    #ifdef FAST_PWM_FAN
    setPwmFrequency(FAN_PIN, 1); // No prescaling. Pwm frequency = F_CPU/256/8
@ -713,28 +719,28 @@ void tp_init()
  #ifdef DIDR2
    DIDR2 = 0;
  #endif
-  #if (TEMP_0_PIN > -1)
+  #if defined(TEMP_0_PIN) && (TEMP_0_PIN > -1)
    #if TEMP_0_PIN < 8
       DIDR0 |= 1 << TEMP_0_PIN; 
    #else
       DIDR2 |= 1<<(TEMP_0_PIN - 8); 
    #endif
  #endif
-  #if (TEMP_1_PIN > -1)
+  #if defined(TEMP_1_PIN) && (TEMP_1_PIN > -1)
    #if TEMP_1_PIN < 8
       DIDR0 |= 1<<TEMP_1_PIN; 
    #else
       DIDR2 |= 1<<(TEMP_1_PIN - 8); 
    #endif
  #endif
-  #if (TEMP_2_PIN > -1)
+  #if defined(TEMP_2_PIN) && (TEMP_2_PIN > -1)
    #if TEMP_2_PIN < 8
       DIDR0 |= 1 << TEMP_2_PIN; 
    #else
       DIDR2 |= 1<<(TEMP_2_PIN - 8); 
    #endif
  #endif
-  #if (TEMP_BED_PIN > -1)
+  #if defined(TEMP_BED_PIN) && (TEMP_BED_PIN > -1)
    #if TEMP_BED_PIN < 8
       DIDR0 |= 1<<TEMP_BED_PIN; 
    #else
@ -855,34 +861,34 @@ void disable_heater()
  for(int i=0;i<EXTRUDERS;i++)
    setTargetHotend(0,i);
  setTargetBed(0);
-  #if TEMP_0_PIN > -1
+  #if defined(TEMP_0_PIN) && TEMP_0_PIN > -1
  target_temperature[0]=0;
  soft_pwm[0]=0;
-   #if HEATER_0_PIN > -1  
+   #if defined(HEATER_0_PIN) && HEATER_0_PIN > -1  
     WRITE(HEATER_0_PIN,LOW);
   #endif
  #endif
     
-  #if TEMP_1_PIN > -1
+  #if defined(TEMP_1_PIN) && TEMP_1_PIN > -1
    target_temperature[1]=0;
    soft_pwm[1]=0;
-    #if HEATER_1_PIN > -1 
+    #if defined(HEATER_1_PIN) && HEATER_1_PIN > -1 
      WRITE(HEATER_1_PIN,LOW);
    #endif
  #endif
      
-  #if TEMP_2_PIN > -1
+  #if defined(TEMP_2_PIN) && TEMP_2_PIN > -1
    target_temperature[2]=0;
    soft_pwm[2]=0;
-    #if HEATER_2_PIN > -1  
+    #if defined(HEATER_2_PIN) && HEATER_2_PIN > -1  
      WRITE(HEATER_2_PIN,LOW);
    #endif
  #endif 

-  #if TEMP_BED_PIN > -1
+  #if defined(TEMP_BED_PIN) && TEMP_BED_PIN > -1
    target_temperature_bed=0;
    soft_pwm_bed=0;
-    #if HEATER_BED_PIN > -1  
+    #if defined(HEATER_BED_PIN) && HEATER_BED_PIN > -1  
      WRITE(HEATER_BED_PIN,LOW);
    #endif
  #endif 
@ -1018,7 +1024,7 @@ ISR(TIMER0_COMPB_vect)
    soft_pwm_2 = soft_pwm[2];
    if(soft_pwm_2 > 0) WRITE(HEATER_2_PIN,1);
    #endif
-    #if HEATER_BED_PIN > -1
+    #if defined(HEATER_BED_PIN) && HEATER_BED_PIN > -1
    soft_pwm_b = soft_pwm_bed;
    if(soft_pwm_b > 0) WRITE(HEATER_BED_PIN,1);
    #endif
@ -1034,7 +1040,7 @@ ISR(TIMER0_COMPB_vect)
  #if EXTRUDERS > 2
  if(soft_pwm_2 <= pwm_count) WRITE(HEATER_2_PIN,0);
  #endif
-  #if HEATER_BED_PIN > -1
+  #if defined(HEATER_BED_PIN) && HEATER_BED_PIN > -1
  if(soft_pwm_b <= pwm_count) WRITE(HEATER_BED_PIN,0);
  #endif
  #ifdef FAN_SOFT_PWM
@ -1046,7 +1052,7 @@ ISR(TIMER0_COMPB_vect)
  
  switch(temp_state) {
    case 0: // Prepare TEMP_0
-      #if (TEMP_0_PIN > -1)
+      #if defined(TEMP_0_PIN) && (TEMP_0_PIN > -1)
        #if TEMP_0_PIN > 7
          ADCSRB = 1<<MUX5;
        #else
@ -1059,7 +1065,7 @@ ISR(TIMER0_COMPB_vect)
      temp_state = 1;
      break;
    case 1: // Measure TEMP_0
-      #if (TEMP_0_PIN > -1)
+      #if defined(TEMP_0_PIN) && (TEMP_0_PIN > -1)
        raw_temp_0_value += ADC;
      #endif
      #ifdef HEATER_0_USES_MAX6675 // TODO remove the blocking
@ -1068,7 +1074,7 @@ ISR(TIMER0_COMPB_vect)
      temp_state = 2;
      break;
    case 2: // Prepare TEMP_BED
-      #if (TEMP_BED_PIN > -1)
+      #if defined(TEMP_BED_PIN) && (TEMP_BED_PIN > -1)
        #if TEMP_BED_PIN > 7
          ADCSRB = 1<<MUX5;
        #else
@ -1081,13 +1087,13 @@ ISR(TIMER0_COMPB_vect)
      temp_state = 3;
      break;
    case 3: // Measure TEMP_BED
-      #if (TEMP_BED_PIN > -1)
+      #if defined(TEMP_BED_PIN) && (TEMP_BED_PIN > -1)
        raw_temp_bed_value += ADC;
      #endif
      temp_state = 4;
      break;
    case 4: // Prepare TEMP_1
-      #if (TEMP_1_PIN > -1)
+      #if defined(TEMP_1_PIN) && (TEMP_1_PIN > -1)
        #if TEMP_1_PIN > 7
          ADCSRB = 1<<MUX5;
        #else
@ -1100,13 +1106,13 @@ ISR(TIMER0_COMPB_vect)
      temp_state = 5;
      break;
    case 5: // Measure TEMP_1
-      #if (TEMP_1_PIN > -1)
+      #if defined(TEMP_1_PIN) && (TEMP_1_PIN > -1)
        raw_temp_1_value += ADC;
      #endif
      temp_state = 6;
      break;
    case 6: // Prepare TEMP_2
-      #if (TEMP_2_PIN > -1)
+      #if defined(TEMP_2_PIN) && (TEMP_2_PIN > -1)
        #if TEMP_2_PIN > 7
          ADCSRB = 1<<MUX5;
        #else
@ -1119,7 +1125,7 @@ ISR(TIMER0_COMPB_vect)
      temp_state = 7;
      break;
    case 7: // Measure TEMP_2
-      #if (TEMP_2_PIN > -1)
+      #if defined(TEMP_2_PIN) && (TEMP_2_PIN > -1)
        raw_temp_2_value += ADC;
      #endif
      temp_state = 0;