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 importlib
import cereal.messaging as messaging
from cereal import car
from common.params import Params
from common.realtime import Ratekeeper, Priority, config_realtime_process
from selfdrive.controls.lib.radar_helpers import RadarD
from system.swaglog import cloudlog
# fuses camera and radar data for best lead detection
def radard_thread(sm=None, pm=None, can_sock=None):
config_realtime_process(5, Priority.CTRL_LOW)
# wait for stats about the car to come in from controls
cloudlog.info("radard is waiting for CarParams")
CP = car.CarParams.from_bytes(Params().get("CarParams", block=True))
cloudlog.info("radard got CarParams")
# import the radar from the fingerprint
cloudlog.info("radard is importing %s", CP.carName)
RadarInterface = importlib.import_module(f'selfdrive.car.{CP.carName}.radar_interface').RadarInterface
# *** setup messaging
if can_sock is None:
can_sock = messaging.sub_sock('can')
if sm is None:
sm = messaging.SubMaster(['modelV2', 'carState'], ignore_avg_freq=['modelV2', 'carState']) # Can't check average frequency, since radar determines timing
if pm is None:
pm = messaging.PubMaster(['radarState', 'liveTracks'])
RI = RadarInterface(CP)
rk = Ratekeeper(1.0 / CP.radarTimeStep, print_delay_threshold=None)
RD = RadarD(CP.radarTimeStep, RI.delay)
while 1:
can_strings = messaging.drain_sock_raw(can_sock, wait_for_one=True)
rr = RI.update(can_strings)
if rr is None:
continue
sm.update(0)
dat = RD.update(sm, rr)
dat.radarState.cumLagMs = -rk.remaining*1000.
pm.send('radarState', dat)
# *** publish tracks for UI debugging (keep last) ***
tracks = RD.tracks
dat = messaging.new_message('liveTracks', len(tracks))
for cnt, ids in enumerate(sorted(tracks.keys())):
dat.liveTracks[cnt] = {
"trackId": ids,
"dRel": float(tracks[ids].dRel),
"yRel": float(tracks[ids].yRel),
"vRel": float(tracks[ids].vRel),
}
pm.send('liveTracks', dat)
rk.monitor_time()
def main(sm=None, pm=None, can_sock=None):
radard_thread(sm, pm, can_sock)
if __name__ == "__main__":
main()