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# Pause/Resume functionality with position capture/restore
#
# Copyright (C) 2019 Eric Callahan <arksine.code@gmail.com>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
class PauseResume:
def __init__(self, config):
self.printer = config.get_printer()
self.gcode = self.printer.lookup_object('gcode')
self.recover_velocity = config.getfloat('recover_velocity', 50.)
self.v_sd = None
self.is_paused = False
self.sd_paused = False
self.pause_command_sent = False
self.printer.register_event_handler("klippy:ready", self.handle_ready)
self.gcode.register_command("PAUSE", self.cmd_PAUSE)
self.gcode.register_command("RESUME", self.cmd_RESUME)
self.gcode.register_command("CLEAR_PAUSE", self.cmd_CLEAR_PAUSE)
def handle_ready(self):
self.v_sd = self.printer.lookup_object('virtual_sdcard', None)
def get_status(self, eventtime):
return {
'is_paused': self.is_paused
}
def send_pause_command(self):
# This sends the appropriate pause command from an event. Note
# the difference between pause_command_sent and is_paused, the
# module isn't officially paused until the PAUSE gcode executes.
if not self.pause_command_sent:
if self.v_sd is not None and self.v_sd.is_active():
# Printing from virtual sd, run pause command
self.sd_paused = True
self.v_sd.do_pause()
else:
self.sd_paused = False
self.gcode.respond_info("action:paused")
self.pause_command_sent = True
def cmd_PAUSE(self, params):
if self.is_paused:
self.gcode.respond_info("Print already paused")
return
self.send_pause_command()
self.gcode.run_script_from_command(
"SAVE_GCODE_STATE STATE=PAUSE_STATE")
self.is_paused = True
def cmd_RESUME(self, params):
if not self.is_paused:
self.gcode.respond_info("Print is not paused, resume aborted")
return
velocity = self.gcode.get_float(
'VELOCITY', params, self.recover_velocity)
self.gcode.run_script_from_command(
"RESTORE_GCODE_STATE STATE=PAUSE_STATE MOVE=1 MOVE_SPEED=%.4f"
% (velocity))
self.is_paused = False
self.pause_command_sent = False
if self.sd_paused:
# Printing from virtual sd, run pause command
self.v_sd.cmd_M24({})
else:
self.gcode.respond_info("action:resumed")
def cmd_CLEAR_PAUSE(self, params):
self.is_paused = self.pause_command_sent = False
def load_config(config):
return PauseResume(config)
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