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# Generic Filament Sensor Module
#
# Copyright (C) 2019 Eric Callahan <arksine.code@gmail.com>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import logging
class BaseSensor(object):
def __init__(self, config):
self.name = config.get_name().split()[1]
self.printer = config.get_printer()
self.gcode = self.printer.lookup_object('gcode')
self.runout_pause = config.getboolean('pause_on_runout', True)
if self.runout_pause:
self.printer.try_load_module(config, 'pause_resume')
self.runout_gcode = self.insert_gcode = None
gcode_macro = self.printer.try_load_module(config, 'gcode_macro')
if self.runout_pause or config.get('runout_gcode', None) is not None:
self.runout_gcode = gcode_macro.load_template(
config, 'runout_gcode', '')
if config.get('insert_gcode', None) is not None:
self.insert_gcode = gcode_macro.load_template(
config, 'insert_gcode')
self.runout_enabled = False
self.insert_enabled = self.insert_gcode is not None
self.event_running = False
self.print_status = "idle"
self.printer.register_event_handler(
"idle_timeout:idle",
(lambda e, s=self, st="idle": s._update_print_status(e, st)))
self.printer.register_event_handler(
"idle_timeout:ready",
(lambda e, s=self, st="ready": s._update_print_status(e, st)))
self.printer.register_event_handler(
"idle_timeout:printing",
(lambda e, s=self, st="printing": s._update_print_status(e, st)))
def _update_print_status(self, eventtime, status):
if status == "printing":
runout_en = self.runout_gcode is not None
self.set_enable(runout_en, False)
else:
insert_en = self.insert_gcode is not None
self.set_enable(False, insert_en)
def _runout_event_handler(self, eventtime):
if self.event_running:
return
self.event_running = True
# Pausing from inside an event requires that the pause portion
# of pause_resume execute immediately.
pause_prefix = ""
if self.runout_pause:
pause_resume = self.printer.lookup_object('pause_resume')
pause_resume.send_pause_command()
pause_prefix = "PAUSE\n"
self._exec_gcode(pause_prefix, self.runout_gcode)
self.event_running = False
def _insert_event_handler(self, eventtime):
if self.event_running:
return
self.event_running = True
self._exec_gcode("", self.insert_gcode)
self.event_running = False
def _exec_gcode(self, prefix, template):
try:
self.gcode.run_script(prefix + template.render() + "\nM400")
except Exception:
logging.exception("Script running error")
def set_enable(self, runout, insert):
if runout and insert:
# both cannot be enabled
insert = False
self.runout_enabled = runout
self.insert_enabled = insert
cmd_QUERY_FILAMENT_SENSOR_help = "Query the status of the Filament Sensor"
def cmd_QUERY_FILAMENT_SENSOR(self, params):
raise NotImplementedError(
"Sensor must implement cmd_QUERY_FILAMENT_SENSOR")
cmd_SET_FILAMENT_SENSOR_help = "Sets the filament sensor on/off"
def cmd_SET_FILAMENT_SENSOR(self, params):
raise NotImplementedError(
"Sensor must implement cmd_SET_FILAMENT_SENSOR")
class SwitchSensor(BaseSensor):
def __init__(self, config):
super(SwitchSensor, self).__init__(config)
self.reactor = self.printer.get_reactor()
self.buttons = self.printer.try_load_module(config, 'buttons')
switch_pin = config.get('switch_pin')
self.buttons.register_buttons([switch_pin], self._button_handler)
self.event_delay = config.getfloat('event_delay', 3., above=0.)
self.start_time = self.reactor.NEVER
self.sensor_enabled = True
self.last_button_state = False
self.last_cb_event_time = 0.
self.gcode.register_mux_command(
"QUERY_FILAMENT_SENSOR", "SENSOR", self.name,
self.cmd_QUERY_FILAMENT_SENSOR,
desc=self.cmd_QUERY_FILAMENT_SENSOR_help)
self.gcode.register_mux_command(
"SET_FILAMENT_SENSOR", "SENSOR", self.name,
self.cmd_SET_FILAMENT_SENSOR,
desc=self.cmd_SET_FILAMENT_SENSOR_help)
self.printer.register_event_handler("klippy:ready", self._handle_ready)
def _handle_ready(self):
self.start_time = self.reactor.monotonic() + 2.
def _button_handler(self, eventtime, state):
if eventtime < self.start_time or state == self.last_button_state:
self.last_button_state = state
return
if state:
# button pushed, check if insert callback should happen
if (self.insert_enabled and self.sensor_enabled and
(eventtime - self.last_cb_event_time) > self.event_delay):
self.last_cb_event_time = eventtime
logging.info(
"switch_sensor: insert event detected, Time %.2f",
eventtime)
self.reactor.register_callback(self._insert_event_handler)
elif (self.runout_enabled and self.sensor_enabled and
(eventtime - self.last_cb_event_time) > self.event_delay):
# Filament runout detected
self.last_cb_event_time = eventtime
logging.info(
"switch_sensor: runout event detected, Time %.2f", eventtime)
self.reactor.register_callback(self._runout_event_handler)
self.last_button_state = state
def cmd_QUERY_FILAMENT_SENSOR(self, params):
if self.last_button_state:
msg = "Switch Sensor: filament detected"
else:
msg = "Switch Sensor: filament not detected"
self.gcode.respond_info(msg)
def cmd_SET_FILAMENT_SENSOR(self, params):
self.sensor_enabled = self.gcode.get_int("ENABLE", params, 1)
def load_config_prefix(config):
return SwitchSensor(config)
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