controller_fan: Minor updates

Document change in behavior of the controller_fan module.

Lookup heater objects in connect() event handler.

Return list of stepper names from stepper_enable.get_steppers().

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

docs/Config_Changes.md

@@ -6,6 +6,11 @@ All dates in this document are approximate.
 
 # Changes
 
+20210720: A controller_fan section now monitors all stepper motors by
+default (not just the kinematic stepper motors).  If the previous
+behavior is desired, see the `stepper` config option in the
+[config reference](Config_Reference.md#controller_fan).
+
 20210703: A `samd_sercom` config section must now specify the sercom
 bus it is configuring via the `sercom` option.
 

klippy/extras/controller_fan.py

@@ -28,9 +28,13 @@ class ControllerFan:
         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.strip())
+                        for n in self.heater_name.split(',')]
+        # Stepper lookup
+        all_steppers = self.stepper_enable.get_steppers()
         steppers = [n.strip() for n in self.steppers_to_monitor.split(',')]
-        all_steppers = [s.get_name()
-                        for s in self.stepper_enable.get_steppers()]
         if steppers == [""]:
             self.stepper_names = all_steppers
             return
@@ -41,9 +45,6 @@ class ControllerFan:
                 % (steppers, ", ".join(all_steppers)))
         self.stepper_names = steppers
     def handle_ready(self):
-        pheaters = self.printer.lookup_object('heaters')
-        self.heaters = [pheaters.lookup_heater(n.strip())
-                        for n in self.heater_name.split(',')]
         reactor = self.printer.get_reactor()
         reactor.register_timer(self.callback, reactor.monotonic()+PIN_MIN_TIME)
     def get_status(self, eventtime):

klippy/extras/stepper_enable.py

@@ -127,7 +127,7 @@ class PrinterStepperEnable:
             raise self.printer.config_error("Unknown stepper '%s'" % (name,))
         return self.enable_lines[name]
     def get_steppers(self):
-        return [e.stepper for e in self.enable_lines.values()]
+        return list(self.enable_lines.keys())
 
 def load_config(config):
     return PrinterStepperEnable(config)