klipper update

klippy/extras/controller_fan.py

@@ -0,0 +1,71 @@
+# Support a fan for cooling the MCU whenever a stepper or heater is on
+#
+# Copyright (C) 2019  Nils Friedchen <nils.friedchen@googlemail.com>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+from . import fan
+
+PIN_MIN_TIME = 0.100
+
+class ControllerFan:
+    def __init__(self, config):
+        self.printer = config.get_printer()
+        self.printer.register_event_handler("klippy:ready", self.handle_ready)
+        self.printer.register_event_handler("klippy:connect",
+                                            self.handle_connect)
+        self.stepper_names = config.getlist("stepper", None)
+        self.stepper_enable = self.printer.load_object(config, 'stepper_enable')
+        self.printer.load_object(config, 'heaters')
+        self.heaters = []
+        self.fan = fan.Fan(config)
+        self.fan_speed = config.getfloat('fan_speed', default=1.,
+                                         minval=0., maxval=1.)
+        self.idle_speed = config.getfloat(
+            'idle_speed', default=self.fan_speed, minval=0., maxval=1.)
+        self.idle_timeout = config.getint("idle_timeout", default=30, minval=0)
+        self.heater_names = config.getlist("heater", ("extruder",))
+        self.last_on = self.idle_timeout
+        self.last_speed = 0.
+    def handle_connect(self):
+        # Heater lookup
+        pheaters = self.printer.lookup_object('heaters')
+        self.heaters = [pheaters.lookup_heater(n) for n in self.heater_names]
+        # Stepper lookup
+        all_steppers = self.stepper_enable.get_steppers()
+        if self.stepper_names is None:
+            self.stepper_names = all_steppers
+            return
+        if not all(x in all_steppers for x in self.stepper_names):
+            raise self.printer.config_error(
+                "One or more of these steppers are unknown: "
+                 "%s (valid steppers are: %s)"
+                % (self.stepper_names, ", ".join(all_steppers)))
+    def handle_ready(self):
+        reactor = self.printer.get_reactor()
+        reactor.register_timer(self.callback, reactor.monotonic()+PIN_MIN_TIME)
+    def get_status(self, eventtime):
+        return self.fan.get_status(eventtime)
+    def callback(self, eventtime):
+        speed = 0.
+        active = False
+        for name in self.stepper_names:
+            active |= self.stepper_enable.lookup_enable(name).is_motor_enabled()
+        for heater in self.heaters:
+            _, target_temp = heater.get_temp(eventtime)
+            if target_temp:
+                active = True
+        if active:
+            self.last_on = 0
+            speed = self.fan_speed
+        elif self.last_on < self.idle_timeout:
+            speed = self.idle_speed
+            self.last_on += 1
+        if speed != self.last_speed:
+            self.last_speed = speed
+            curtime = self.printer.get_reactor().monotonic()
+            print_time = self.fan.get_mcu().estimated_print_time(curtime)
+            self.fan.set_speed(print_time + PIN_MIN_TIME, speed)
+        return eventtime + 1.
+
+def load_config_prefix(config):
+    return ControllerFan(config)