Merge pull request #4856 from thinkyhead/rc_bltouch_update

Fix and extend BLTouch support

Marlin/Conditionals_LCD.h

@@ -318,6 +318,7 @@
 
   /**
    * The BLTouch Probe emulates a servo probe
+   * and uses "special" angles for its state.
    */
   #if ENABLED(BLTOUCH)
     #ifndef Z_ENDSTOP_SERVO_NR
@@ -326,12 +327,22 @@
     #ifndef NUM_SERVOS
       #define NUM_SERVOS (Z_ENDSTOP_SERVO_NR + 1)
     #endif
-    #undef Z_SERVO_ANGLES
-    #define Z_SERVO_ANGLES {10,90} // For BLTouch 10=deploy, 90=retract
     #undef DEACTIVATE_SERVOS_AFTER_MOVE
+    #undef Z_SERVO_ANGLES
+    #define Z_SERVO_ANGLES { BLTOUCH_DEPLOY, BLTOUCH_STOW }
+
+    #define BLTOUCH_DEPLOY    10
+    #define BLTOUCH_STOW   90
+    #define BLTOUCH_SELFTEST 120
+    #define BLTOUCH_RELEASE  160
+    #define _TEST_BLTOUCH(P) (READ(P##_PIN) != P##_ENDSTOP_INVERTING)
+
     #if ENABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN)
       #undef Z_MIN_ENDSTOP_INVERTING
       #define Z_MIN_ENDSTOP_INVERTING false
+      #define TEST_BLTOUCH() _TEST_BLTOUCH(Z_MIN)
+    #else
+      #define TEST_BLTOUCH() _TEST_BLTOUCH(Z_MIN_PROBE)
     #endif
   #endif
 

Marlin/Marlin_main.cpp

@@ -1866,6 +1866,12 @@ static void clean_up_after_endstop_or_probe_move() {
   #define DEPLOY_PROBE() set_probe_deployed(true)
   #define STOW_PROBE() set_probe_deployed(false)
 
+  #if ENABLED(BLTOUCH)
+    FORCE_INLINE void set_bltouch_deployed(const bool &deploy) {
+      servo[Z_ENDSTOP_SERVO_NR].move(deploy ? BLTOUCH_DEPLOY : BLTOUCH_STOW);
+    }
+  #endif
+
   // returns false for ok and true for failure
   static bool set_probe_deployed(bool deploy) {
 
@@ -1881,9 +1887,9 @@ static void clean_up_after_endstop_or_probe_move() {
     // Make room for probe
     do_probe_raise(_Z_PROBE_DEPLOY_HEIGHT);
 
-    // Check BLTOUCH probe status for an error
+    // When deploying make sure BLTOUCH is not already triggered
     #if ENABLED(BLTOUCH)
-      if (servo[Z_ENDSTOP_SERVO_NR].read() == BLTouchState_Error) { stop(); return true; }
+      if (deploy && TEST_BLTOUCH()) { stop(); return true; }
     #endif
 
     #if ENABLED(Z_PROBE_SLED)
@@ -1911,7 +1917,7 @@ static void clean_up_after_endstop_or_probe_move() {
 
           dock_sled(!deploy);
 
-        #elif HAS_Z_SERVO_ENDSTOP
+        #elif HAS_Z_SERVO_ENDSTOP && DISABLED(BLTOUCH)
 
           servo[Z_ENDSTOP_SERVO_NR].move(z_servo_angle[deploy ? 0 : 1]);
 
@@ -1948,9 +1954,19 @@ static void clean_up_after_endstop_or_probe_move() {
       if (DEBUGGING(LEVELING)) DEBUG_POS(">>> do_probe_move", current_position);
     #endif
 
+    // Deploy BLTouch at the start of any probe
+    #if ENABLED(BLTOUCH)
+      set_bltouch_deployed(true);
+    #endif
+
     // Move down until probe triggered
     do_blocking_move_to_z(LOGICAL_Z_POSITION(z), MMM_TO_MMS(fr_mm_m));
 
+    // Retract BLTouch immediately after a probe
+    #if ENABLED(BLTOUCH)
+      set_bltouch_deployed(false);
+    #endif
+
     // Clear endstop flags
     endstops.hit_on_purpose();
 
@@ -2182,11 +2198,21 @@ static void clean_up_after_endstop_or_probe_move() {
  */
 
 static void do_homing_move(AxisEnum axis, float where, float fr_mm_s = 0.0) {
+
+  #if HOMING_Z_WITH_PROBE && ENABLED(BLTOUCH)
+    set_bltouch_deployed(true);
+  #endif
+
   current_position[axis] = 0;
   sync_plan_position();
   current_position[axis] = where;
   planner.buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], (fr_mm_s != 0.0) ? fr_mm_s : homing_feedrate_mm_s[axis], active_extruder);
   stepper.synchronize();
+
+  #if HOMING_Z_WITH_PROBE && ENABLED(BLTOUCH)
+    set_bltouch_deployed(false);
+  #endif
+
   endstops.hit_on_purpose();
 }
 

Marlin/enum.h

@@ -124,15 +124,6 @@ enum TempState {
   };
 #endif
 
-#if ENABLED(BLTOUCH)
-  enum BLTouchState {
-    BLTouchState_Deploy   = 10,
-    BLTouchState_Stow     = 90,
-    BLTouchState_Selftest = 120,
-    BLTouchState_Error    = 160
-  };
-#endif
-
 #if ENABLED(FILAMENT_CHANGE_FEATURE)
   enum FilamentChangeMenuResponse {
     FILAMENT_CHANGE_RESPONSE_WAIT_FOR,

Marlin/language_en.h

@@ -366,8 +366,11 @@
 #ifndef MSG_ZPROBE_OUT
   #define MSG_ZPROBE_OUT                      "Z probe out. bed"
 #endif
-#ifndef MSG_RESET_BLTOUCH
+#ifndef MSG_BLTOUCH_RESET
-  #define MSG_RESET_BLTOUCH                   "Reset BLTouch"
+  #define MSG_BLTOUCH_SELFTEST                "BLTouch Self-Test"
+#endif
+#ifndef MSG_BLTOUCH_RESET
+  #define MSG_BLTOUCH_RESET                   "Reset BLTouch"
 #endif
 #ifndef MSG_HOME
   #define MSG_HOME                            "Home"  // Used as MSG_HOME " " MSG_X MSG_Y MSG_Z " " MSG_FIRST

Marlin/ultralcd.cpp

@@ -31,8 +31,7 @@
 #include "utility.h"
 
 #if ENABLED(BLTOUCH)
-  #include "servo.h"
+  #include "endstops.h"
-  extern Servo servo[NUM_SERVOS];
 #endif
 
 #if ENABLED(PRINTCOUNTER)
@@ -593,8 +592,8 @@ void kill_screen(const char* lcd_msg) {
     MENU_ITEM(back, MSG_WATCH);
 
     #if ENABLED(BLTOUCH)
-      if (servo[Z_ENDSTOP_SERVO_NR].read() == BLTouchState_Error)
+      if (!endstops.z_probe_enabled && TEST_BLTOUCH())
-        MENU_ITEM(gcode, MSG_RESET_BLTOUCH, "M280 S90 P" STRINGIFY(Z_ENDSTOP_SERVO_NR));
+        MENU_ITEM(gcode, MSG_BLTOUCH_RESET, PSTR("M280 P" STRINGIFY(Z_ENDSTOP_SERVO_NR) " S" STRINGIFY(BLTOUCH_RESET)));
     #endif
 
     if (planner.movesplanned() || IS_SD_PRINTING) {
@@ -1250,6 +1249,15 @@ void kill_screen(const char* lcd_msg) {
     //
     MENU_ITEM(function, MSG_COOLDOWN, lcd_cooldown);
 
+    //
+    // BLTouch Self-Test and Reset
+    //
+    #if ENABLED(BLTOUCH)
+      MENU_ITEM(gcode, MSG_BLTOUCH_TEST, PSTR("M280 P" STRINGIFY(Z_ENDSTOP_SERVO_NR) " S" STRINGIFY(BLTOUCH_SELFTEST)));
+      if (!endstops.z_probe_enabled && TEST_BLTOUCH())
+        MENU_ITEM(gcode, MSG_BLTOUCH_RESET, PSTR("M280 P" STRINGIFY(Z_ENDSTOP_SERVO_NR) " S" STRINGIFY(BLTOUCH_RESET)));
+    #endif
+
     //
     // Switch power on/off
     //