#!/usr/bin/env python3
import math
from cereal import car
from openpilot.common.conversions import Conversions as CV
from opendbc.can.parser import CANParser
from openpilot.selfdrive.car.gm.values import DBC, CanBus
from openpilot.selfdrive.car.interfaces import RadarInterfaceBase
RADAR_HEADER_MSG = 1120
SLOT_1_MSG = RADAR_HEADER_MSG + 1
NUM_SLOTS = 20
# Actually it's 0x47f, but can parser only reports
# messages that are present in DBC
LAST_RADAR_MSG = RADAR_HEADER_MSG + NUM_SLOTS
[docs]
def create_radar_can_parser(car_fingerprint):
# C1A-ARS3-A by Continental
radar_targets = list(range(SLOT_1_MSG, SLOT_1_MSG + NUM_SLOTS))
signals = list(zip(['FLRRNumValidTargets',
'FLRRSnsrBlckd', 'FLRRYawRtPlsblityFlt',
'FLRRHWFltPrsntInt', 'FLRRAntTngFltPrsnt',
'FLRRAlgnFltPrsnt', 'FLRRSnstvFltPrsntInt'] +
['TrkRange'] * NUM_SLOTS + ['TrkRangeRate'] * NUM_SLOTS +
['TrkRangeAccel'] * NUM_SLOTS + ['TrkAzimuth'] * NUM_SLOTS +
['TrkWidth'] * NUM_SLOTS + ['TrkObjectID'] * NUM_SLOTS,
[RADAR_HEADER_MSG] * 7 + radar_targets * 6, strict=True))
messages = list({(s[1], 14) for s in signals})
return CANParser(DBC[car_fingerprint]['radar'], messages, CanBus.OBSTACLE)
[docs]
class RadarInterface(RadarInterfaceBase):
def __init__(self, CP):
super().__init__(CP)
self.rcp = None if CP.radarUnavailable else create_radar_can_parser(CP.carFingerprint)
self.trigger_msg = LAST_RADAR_MSG
self.updated_messages = set()
self.radar_ts = CP.radarTimeStep
[docs]
def update(self, can_strings):
if self.rcp is None:
return super().update(None)
vls = self.rcp.update_strings(can_strings)
self.updated_messages.update(vls)
if self.trigger_msg not in self.updated_messages:
return None
ret = car.RadarData.new_message()
header = self.rcp.vl[RADAR_HEADER_MSG]
fault = header['FLRRSnsrBlckd'] or header['FLRRSnstvFltPrsntInt'] or \
header['FLRRYawRtPlsblityFlt'] or header['FLRRHWFltPrsntInt'] or \
header['FLRRAntTngFltPrsnt'] or header['FLRRAlgnFltPrsnt']
errors = []
if not self.rcp.can_valid:
errors.append("canError")
if fault:
errors.append("fault")
ret.errors = errors
currentTargets = set()
num_targets = header['FLRRNumValidTargets']
# Not all radar messages describe targets,
# no need to monitor all of the self.rcp.msgs_upd
for ii in self.updated_messages:
if ii == RADAR_HEADER_MSG:
continue
if num_targets == 0:
break
cpt = self.rcp.vl[ii]
# Zero distance means it's an empty target slot
if cpt['TrkRange'] > 0.0:
targetId = cpt['TrkObjectID']
currentTargets.add(targetId)
if targetId not in self.pts:
self.pts[targetId] = car.RadarData.RadarPoint.new_message()
self.pts[targetId].trackId = targetId
distance = cpt['TrkRange']
self.pts[targetId].dRel = distance # from front of car
# From driver's pov, left is positive
self.pts[targetId].yRel = math.sin(cpt['TrkAzimuth'] * CV.DEG_TO_RAD) * distance
self.pts[targetId].vRel = cpt['TrkRangeRate']
self.pts[targetId].aRel = float('nan')
self.pts[targetId].yvRel = float('nan')
for oldTarget in list(self.pts.keys()):
if oldTarget not in currentTargets:
del self.pts[oldTarget]
ret.points = list(self.pts.values())
self.updated_messages.clear()
return ret