klipper update

klippy/extras/homing_heaters.py

@@ -0,0 +1,64 @@
+# Heater handling on homing moves
+#
+# Copyright (C) 2016-2018  Kevin O'Connor <kevin@koconnor.net>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+
+import logging
+
+class HomingHeaters:
+    def __init__(self, config):
+        self.printer = config.get_printer()
+        self.printer.register_event_handler("klippy:connect",
+                                            self.handle_connect)
+        self.printer.register_event_handler("homing:homing_move_begin",
+                                            self.handle_homing_move_begin)
+        self.printer.register_event_handler("homing:homing_move_end",
+                                            self.handle_homing_move_end)
+        self.disable_heaters = config.getlist("heaters", None)
+        self.flaky_steppers = config.getlist("steppers", None)
+        self.pheaters = self.printer.load_object(config, 'heaters')
+        self.target_save = {}
+
+    def handle_connect(self):
+        # heaters to disable
+        all_heaters = self.pheaters.get_all_heaters()
+        if self.disable_heaters is None:
+            self.disable_heaters = all_heaters
+        else:
+            if not all(x in all_heaters for x in self.disable_heaters):
+                raise self.printer.config_error(
+                    "One or more of these heaters are unknown: %s"
+                    % (self.disable_heaters,))
+        # steppers valid?
+        kin = self.printer.lookup_object('toolhead').get_kinematics()
+        all_steppers = [s.get_name() for s in kin.get_steppers()]
+        if self.flaky_steppers is None:
+            return
+        if not all(x in all_steppers for x in self.flaky_steppers):
+            raise self.printer.config_error(
+                "One or more of these steppers are unknown: %s"
+                % (self.flaky_steppers,))
+    def check_eligible(self, endstops):
+        if self.flaky_steppers is None:
+            return True
+        steppers_being_homed = [s.get_name()
+                                for es in endstops
+                                for s in es.get_steppers()]
+        return any(x in self.flaky_steppers for x in steppers_being_homed)
+    def handle_homing_move_begin(self, hmove):
+        if not self.check_eligible(hmove.get_mcu_endstops()):
+            return
+        for heater_name in self.disable_heaters:
+            heater = self.pheaters.lookup_heater(heater_name)
+            self.target_save[heater_name] = heater.get_temp(0)[1]
+            heater.set_temp(0.)
+    def handle_homing_move_end(self, hmove):
+        if not self.check_eligible(hmove.get_mcu_endstops()):
+            return
+        for heater_name in self.disable_heaters:
+            heater = self.pheaters.lookup_heater(heater_name)
+            heater.set_temp(self.target_save[heater_name])
+
+def load_config(config):
+    return HomingHeaters(config)