openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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#!/usr/bin/env python3
import datetime
import subprocess
import time
from typing import NoReturn
import cereal.messaging as messaging
from openpilot.common.time import min_date, system_time_valid
from openpilot.common.swaglog import cloudlog
from openpilot.common.params import Params
from openpilot.common.gps import get_gps_location_service
def set_time(new_time):
diff = datetime.datetime.now() - new_time
if abs(diff) < datetime.timedelta(seconds=10):
cloudlog.debug(f"Time diff too small: {diff}")
return
cloudlog.debug(f"Setting time to {new_time}")
try:
subprocess.run(f"TZ=UTC date -s '{new_time}'", shell=True, check=True)
except subprocess.CalledProcessError:
cloudlog.exception("timed.failed_setting_time")
def main() -> NoReturn:
"""
timed has two responsibilities:
- getting the current time from GPS
- publishing the time in the logs
AGNOS will also use NTP to update the time.
"""
params = Params()
gps_location_service = get_gps_location_service(params)
pm = messaging.PubMaster(['clocks'])
sm = messaging.SubMaster([gps_location_service])
while True:
sm.update(1000)
msg = messaging.new_message('clocks')
msg.valid = system_time_valid()
msg.clocks.wallTimeNanos = time.time_ns()
pm.send('clocks', msg)
gps = sm[gps_location_service]
gps_time = datetime.datetime.fromtimestamp(gps.unixTimestampMillis / 1000.)
if not sm.updated[gps_location_service] or (time.monotonic() - sm.logMonoTime[gps_location_service] / 1e9) > 2.0:
continue
if not gps.hasFix:
continue
if gps_time < min_date():
continue
set_time(gps_time)
time.sleep(10)
if __name__ == "__main__":
main()