Merge pull request #1772 from croadfeldt/Merge_cleanup

Z_PROBE_ENDSTOP

Marlin/Conditionals.h

       #define ENDSTOPPULLUP_YMIN
       #define ENDSTOPPULLUP_ZMIN
     #endif
+    #ifndef DISABLE_Z_PROBE_ENDSTOP
+      #define ENDSTOPPULLUP_ZPROBE
+    #endif
   #endif
 
   /**

Marlin/Configuration.h

   // #define ENDSTOPPULLUP_XMIN
   // #define ENDSTOPPULLUP_YMIN
   // #define ENDSTOPPULLUP_ZMIN
+  // #define ENDSTOPPULLUP_ZPROBE
 #endif
 
 // Mechanical endstop with COM to ground and NC to Signal uses "false" here (most common setup).
 const bool X_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
 const bool Y_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
 const bool Z_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
+const bool Z_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
 //#define DISABLE_MAX_ENDSTOPS
 //#define DISABLE_MIN_ENDSTOPS
+// If you want to enable the Z Probe pin, but disable its use, uncomment the line below.
+// This only affects a Z Probe Endstop if you have separate Z min endstop as well and have
+// activated Z_PROBE_ENDSTOP below. If you are using the Z Min endstop on your Z Probe,
+// this has no effect.
+//#define DISABLE_Z_PROBE_ENDSTOP
 
 // For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
 #define X_ENABLE_ON 0
 
   #endif
 
+// Support for a dedicated Z PROBE endstop separate from the Z MIN endstop.
+// If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
+// If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
+// WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
+// To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+// If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
+// RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
+// for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
+// The D32 pin in Aux 4 on RAMPS maps to the Arduino D32 pin. Z_PROBE_PIN is setting the pin to use on the Arduino. Since the D32 pin on the RAMPS maps to D32 on Arduino, this works.
+// D32 is currently selected in the RAMPS 1.3/1.4 pin file. All other boards will need changes to the respective pins_XXXXX.h file.
+// WARNING: Setting the wrong pin may have unexpected and potentially disastrous outcomes. Use with caution and do your homework.
+
+//  #define Z_PROBE_ENDSTOP
+
 #endif // ENABLE_AUTO_BED_LEVELING
 
 

Marlin/Marlin_main.cpp

       prepare_move_raw();
       
       st_synchronize();
-      
+
+    #if defined(Z_PROBE_ENDSTOP)
+      bool z_probe_endstop = (READ(Z_PROBE_PIN) != Z_PROBE_ENDSTOP_INVERTING);
+      if (z_probe_endstop) {
+    #else
       bool z_min_endstop = (READ(Z_MIN_PIN) != Z_MIN_ENDSTOP_INVERTING);
       if (z_min_endstop) {
+    #endif
         if (!Stopped) {
           SERIAL_ERROR_START;
           SERIAL_ERRORLNPGM("Z-Probe failed to engage!");
       prepare_move_raw();
       
       st_synchronize();
-      
+
+    #if defined(Z_PROBE_ENDSTOP)
+      bool z_probe_endstop = (READ(Z_PROBE_PIN) != Z_PROBE_ENDSTOP_INVERTING);
+      if (!z_probe_endstop) {
+    #else
       bool z_min_endstop = (READ(Z_MIN_PIN) != Z_MIN_ENDSTOP_INVERTING);
       if (!z_min_endstop) {
+    #endif
         if (!Stopped) {
           SERIAL_ERROR_START;
           SERIAL_ERRORLNPGM("Z-Probe failed to retract!");
   } // code_seen('S')
 }
 
-
 #if defined(ENABLE_AUTO_BED_LEVELING) && defined(Z_PROBE_REPEATABILITY_TEST)
 
-  #if Z_MIN_PIN == -1
-    #error "You must have a Z_MIN endstop in order to enable calculation of Z-Probe repeatability."
+  // This is redudant since the SanityCheck.h already checks for a valid Z_PROBE_PIN, but here for clarity.
+  #if defined (Z_PROBE_ENDSTOP)
+    #if (! defined (Z_PROBE_PIN) || Z_PROBE_PIN == -1)
+      #error "You must have a Z_PROBE_PIN defined in order to enable calculation of Z-Probe repeatability."
+    #endif
+  #else
+    #if (Z_MIN_PIN == -1)
+      #error "You must have a Z_MIN_PIN defined in order to enable calculation of Z-Probe repeatability."
+    #endif
   #endif
 
   /**
     SERIAL_PROTOCOLPGM(MSG_Z2_MAX);
     SERIAL_PROTOCOLLN(((READ(Z2_MAX_PIN)^Z2_MAX_ENDSTOP_INVERTING)?MSG_ENDSTOP_HIT:MSG_ENDSTOP_OPEN));
   #endif
-  
+  #if defined(Z_PROBE_PIN) && Z_PROBE_PIN > -1
+    SERIAL_PROTOCOLPGM(MSG_Z_PROBE);
+    SERIAL_PROTOCOLLN(((READ(Z_PROBE_PIN)^Z_PROBE_ENDSTOP_INVERTING)?MSG_ENDSTOP_HIT:MSG_ENDSTOP_OPEN));
+  #endif
 }
 
 /**

Marlin/SanityCheck.h

      * Require a Z Min pin
      */
     #if Z_MIN_PIN == -1
-      #ifdef Z_PROBE_REPEATABILITY_TEST
-        #error You must have a Z_MIN endstop to enable Z_PROBE_REPEATABILITY_TEST.
-      #else
-        #error ENABLE_AUTO_BED_LEVELING requires a Z_MIN endstop. Z_MIN_PIN must point to a valid hardware pin.
+      #if Z_PROBE_PIN == -1 || (! defined (Z_PROBE_ENDSTOP) || defined (DISABLE_Z_PROBE_ENDSTOP)) // It's possible for someone to set a pin for the Z Probe, but not enable it.
+        #ifdef Z_PROBE_REPEATABILITY_TEST
+          #error You must have a Z_MIN or Z_PROBE endstop to enable Z_PROBE_REPEATABILITY_TEST.
+        #else
+          #error ENABLE_AUTO_BED_LEVELING requires a Z_MIN or Z_PROBE endstop. Z_MIN_PIN or Z_PROBE_PIN must point to a valid hardware pin.
+        #endif
       #endif
     #endif
 
     /**
+     * Require a Z Probe Pin if Z_PROBE_ENDSTOP is enabled.
+     */
+    #if defined(Z_PROBE_ENDSTOP)
+      #ifndef Z_PROBE_PIN
+        #error You must have a Z_PROBE_PIN defined in your pins_XXXX.h file if you enable Z_PROBE_ENDSTOP
+      #endif
+      #if Z_PROBE_PIN == -1
+        #error You must set Z_PROBE_PIN to a valid pin if you enable Z_PROBE_ENDSTOP
+      #endif
+// Forcing Servo definitions can break some hall effect sensor setups. Leaving these here for further comment.
+//      #ifndef NUM_SERVOS
+//        #error You must have NUM_SERVOS defined and there must be at least 1 configured to use Z_PROBE_ENDSTOP
+//      #endif
+//      #if defined(NUM_SERVOS) && NUM_SERVOS < 1
+//        #error You must have at least 1 servo defined for NUM_SERVOS to use Z_PROBE_ENDSTOP
+//      #endif
+//      #ifndef SERVO_ENDSTOPS
+//        #error You must have SERVO_ENDSTOPS defined and have the Z index set to at least 0 or above to use Z_PROBE_ENDSTOP
+//      #endif
+//      #ifndef SERVO_ENDSTOP_ANGLES
+//        #error You must have SERVO_ENDSTOP_ANGLES defined for Z Extend and Retract to use Z_PROBE_AND_ENSTOP
+//      #endif
+    #endif
+    /**
      * Check if Probe_Offset * Grid Points is greater than Probing Range
      */
     #ifdef AUTO_BED_LEVELING_GRID

Marlin/language.h

 #define MSG_Z_MIN                           "z_min: "
 #define MSG_Z_MAX                           "z_max: "
 #define MSG_Z2_MAX                          "z2_max: "
+#define MSG_Z_PROBE                         "z_probe: "
 #define MSG_M119_REPORT                     "Reporting endstop status"
 #define MSG_ENDSTOP_HIT                     "TRIGGERED"
 #define MSG_ENDSTOP_OPEN                    "open"

Marlin/pins.h

   #define Z_MIN_PIN          -1
 #endif
 
+#if defined (DISABLE_Z_PROBE_ENDSTOP) || ! defined (Z_PROBE_ENDSTOP) // Allow code to compile regardless of Z_PROBE_ENDSTOP setting.
+  #define Z_PROBE_PIN        -1
+#endif
+
 #ifdef DISABLE_XMAX_ENDSTOP
   #undef X_MAX_PIN
   #define X_MAX_PIN          -1
   #define Z_MIN_PIN          -1
 #endif
 
-#define SENSITIVE_PINS { 0, 1, X_STEP_PIN, X_DIR_PIN, X_ENABLE_PIN, X_MIN_PIN, X_MAX_PIN, Y_STEP_PIN, Y_DIR_PIN, Y_ENABLE_PIN, Y_MIN_PIN, Y_MAX_PIN, Z_STEP_PIN, Z_DIR_PIN, Z_ENABLE_PIN, Z_MIN_PIN, Z_MAX_PIN, PS_ON_PIN, \
+#define SENSITIVE_PINS { 0, 1, X_STEP_PIN, X_DIR_PIN, X_ENABLE_PIN, X_MIN_PIN, X_MAX_PIN, Y_STEP_PIN, Y_DIR_PIN, Y_ENABLE_PIN, Y_MIN_PIN, Y_MAX_PIN, Z_STEP_PIN, Z_DIR_PIN, Z_ENABLE_PIN, Z_MIN_PIN, Z_MAX_PIN, Z_PROBE_PIN, PS_ON_PIN, \
                         HEATER_BED_PIN, FAN_PIN, \
                         _E0_PINS _E1_PINS _E2_PINS _E3_PINS \
                         analogInputToDigitalPin(TEMP_BED_PIN) \

Marlin/pins_RAMPS_13.h

 #define Z_ENABLE_PIN       62
 #define Z_MIN_PIN          18
 #define Z_MAX_PIN          19
+#define Z_PROBE_PIN        -1
 
 #define Y2_STEP_PIN        36
 #define Y2_DIR_PIN         34
   #define FILWIDTH_PIN        5
 #endif
 
+#if defined(Z_PROBE_ENDSTOP)
+  // Define a pin to use as the signal pin on Arduino for the Z_PROBE endstop.
+ #define Z_PROBE_PIN 32
+#endif
+
 #if defined(FILAMENT_RUNOUT_SENSOR)
   // define digital pin 4 for the filament runout sensor. Use the RAMPS 1.4 digital input 4 on the servos connector
   #define FILRUNOUT_PIN        4

Marlin/stepper.cpp

 static volatile bool endstop_x_hit = false;
 static volatile bool endstop_y_hit = false;
 static volatile bool endstop_z_hit = false;
+static volatile bool endstop_z_probe_hit = false; // Leaving this in even if Z_PROBE_ENDSTOP isn't defined, keeps code below cleaner. #ifdef it and usage below to save space.
 
 #ifdef ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
   bool abort_on_endstop_hit = false;
   #endif
 #endif
 
+#ifdef Z_PROBE_ENDSTOP // No need to check for valid pin, SanityCheck.h already does this.
+static bool old_z_probe_endstop = false;
+#endif
+
 static bool check_endstops = true;
 
 volatile long count_position[NUM_AXIS] = { 0 };
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() TIMSK1 &= ~BIT(OCIE1A)
 
 void endstops_hit_on_purpose() {
-  endstop_x_hit = endstop_y_hit = endstop_z_hit = false;
+  endstop_x_hit = endstop_y_hit = endstop_z_hit = endstop_z_probe_hit = false; // #ifdef endstop_z_probe_hit = to save space if needed.
 }
 
 void checkHitEndstops() {
-  if (endstop_x_hit || endstop_y_hit || endstop_z_hit) {
+  if (endstop_x_hit || endstop_y_hit || endstop_z_hit || endstop_z_probe_hit) { // #ifdef || endstop_z_probe_hit to save space if needed.
     SERIAL_ECHO_START;
     SERIAL_ECHOPGM(MSG_ENDSTOPS_HIT);
     if (endstop_x_hit) {
       SERIAL_ECHOPAIR(" Z:", (float)endstops_trigsteps[Z_AXIS] / axis_steps_per_unit[Z_AXIS]);
       LCD_MESSAGEPGM(MSG_ENDSTOPS_HIT "Z");
     }
+    #ifdef Z_PROBE_ENDSTOP
+    if (endstop_z_probe_hit) {
+    	SERIAL_ECHOPAIR(" Z_PROBE:", (float)endstops_trigsteps[Z_AXIS] / axis_steps_per_unit[Z_AXIS]);
+    	LCD_MESSAGEPGM(MSG_ENDSTOPS_HIT "ZP");
+    }
+    #endif
     SERIAL_EOL;
 
     endstops_hit_on_purpose();
 
         #endif // Z_MIN_PIN
 
+        #ifdef Z_PROBE_ENDSTOP
+          UPDATE_ENDSTOP(z, Z, probe, PROBE);
+          z_probe_endstop=(READ(Z_PROBE_PIN) != Z_PROBE_ENDSTOP_INVERTING);
+          if(z_probe_endstop && old_z_probe_endstop)
+          {
+        	  endstops_trigsteps[Z_AXIS] = count_position[Z_AXIS];
+        	  endstop_z_probe_hit=true;
+
+//        	  if (z_probe_endstop && old_z_probe_endstop) SERIAL_ECHOLN("z_probe_endstop = true");
+          }
+          old_z_probe_endstop = z_probe_endstop;
+        #endif
+        
       } // check_endstops
 
     }
           #endif // !Z_DUAL_ENDSTOPS
 
         #endif // Z_MAX_PIN
+        
+        #ifdef Z_PROBE_ENDSTOP
+          UPDATE_ENDSTOP(z, Z, probe, PROBE);
+          z_probe_endstop=(READ(Z_PROBE_PIN) != Z_PROBE_ENDSTOP_INVERTING);
+          if(z_probe_endstop && old_z_probe_endstop)
+          {
+        	  endstops_trigsteps[Z_AXIS] = count_position[Z_AXIS];
+        	  endstop_z_probe_hit=true;
+//        	  if (z_probe_endstop && old_z_probe_endstop) SERIAL_ECHOLN("z_probe_endstop = true");
+          }
+          old_z_probe_endstop = z_probe_endstop;
+        #endif
 
       } // check_endstops
 
       step_events_completed++;
       if (step_events_completed >= current_block->step_event_count) break;
     }
-    // Calculare new timer value
+    // Calculate new timer value
     unsigned short timer;
     unsigned short step_rate;
     if (step_events_completed <= (unsigned long int)current_block->accelerate_until) {
     #endif
   #endif  
   
+#if (defined(Z_PROBE_PIN) && Z_PROBE_PIN >= 0) && defined(Z_PROBE_ENDSTOP) // Check for Z_PROBE_ENDSTOP so we don't pull a pin high unless it's to be used.
+  SET_INPUT(Z_PROBE_PIN);
+  #ifdef ENDSTOPPULLUP_ZPROBE
+    WRITE(Z_PROBE_PIN,HIGH);
+  #endif
+#endif
+
   #define AXIS_INIT(axis, AXIS, PIN) \
     AXIS ##_STEP_INIT; \
     AXIS ##_STEP_WRITE(INVERT_## PIN ##_STEP_PIN); \