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reactor: Use the system monotonic clock instead of the normal system clock

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The normal system clock can have sudden jumps if the system clock is
changed.  Use the system monotonic clock to avoid these sudden changes
in time.

It appears the Raspbian OS (which is used by OctoPi) is setup to
update the system clock upon network connectivity.  This could cause
sudden system clock changes which could lead to Klippy processing
errors.  Using the monotonic clock eliminates these issues.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-02-06 13:31:34 -05:00
parent c24b7a7ef9
commit 20d0936fa2
10 changed files with 58 additions and 45 deletions
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13
klippy/toolhead.py
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@ -3,7 +3,7 @@
# Copyright (C) 2016 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import math, logging, time
import math, logging
import cartesian, delta, extruder
# Common suffixes: _d is distance (in mm), _v is velocity (in
@ -210,7 +210,7 @@ class ToolHead:
def get_next_move_time(self):
if not self.print_time:
self.print_time = self.buffer_time_low + STALL_TIME
curtime = time.time()
curtime = self.reactor.monotonic()
self.printer.mcu.set_print_start_time(curtime)
self.reactor.update_timer(self.flush_timer, self.reactor.NOW)
return self.print_time
@ -224,15 +224,16 @@ class ToolHead:
self.printer.mcu.flush_moves(self.print_time)
self.print_time = 0.
self.need_check_stall = -1.
self.reset_motor_off_time(time.time())
self.reset_motor_off_time(self.reactor.monotonic())
self.reactor.update_timer(self.flush_timer, self.motor_off_time)
def _check_stall(self):
if not self.print_time:
# XXX - find better way to flush initial move_queue items
if self.move_queue.queue:
self.reactor.update_timer(self.flush_timer, time.time() + 0.100)
self.reactor.update_timer(
self.flush_timer, self.reactor.monotonic() + 0.100)
return
eventtime = time.time()
eventtime = self.reactor.monotonic()
while 1:
buffer_time = self.printer.mcu.get_print_buffer_time(
eventtime, self.print_time)
@ -310,7 +311,7 @@ class ToolHead:
logging.debug('; Max time of %f' % (last_move_time,))
def wait_moves(self):
self.move_queue.flush()
eventtime = time.time()
eventtime = self.reactor.monotonic()
while self.print_time:
eventtime = self.reactor.pause(eventtime + 0.100)
def query_endstops(self):