130 lines
4.1 KiB
Python
130 lines
4.1 KiB
Python
import time
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from collections import defaultdict
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from functools import partial
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import cereal.messaging as messaging
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from selfdrive.swaglog import cloudlog
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from selfdrive.boardd.boardd import can_list_to_can_capnp
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from panda.python.uds import CanClient, IsoTpMessage, FUNCTIONAL_ADDRS, get_rx_addr_for_tx_addr
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class IsoTpParallelQuery():
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def __init__(self, sendcan, logcan, bus, addrs, request, response, response_offset=0x8, functional_addr=False, debug=False):
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self.sendcan = sendcan
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self.logcan = logcan
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self.bus = bus
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self.request = request
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self.response = response
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self.debug = debug
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self.functional_addr = functional_addr
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self.real_addrs = []
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for a in addrs:
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if isinstance(a, tuple):
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self.real_addrs.append(a)
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else:
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self.real_addrs.append((a, None))
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self.msg_addrs = {tx_addr: get_rx_addr_for_tx_addr(tx_addr[0], rx_offset=response_offset) for tx_addr in self.real_addrs}
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self.msg_buffer = defaultdict(list)
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def rx(self):
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"""Drain can socket and sort messages into buffers based on address"""
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can_packets = messaging.drain_sock(self.logcan, wait_for_one=True)
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for packet in can_packets:
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for msg in packet.can:
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if msg.src == self.bus:
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if self.functional_addr:
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if (0x7E8 <= msg.address <= 0x7EF) or (0x18DAF100 <= msg.address <= 0x18DAF1FF):
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fn_addr = next(a for a in FUNCTIONAL_ADDRS if msg.address - a <= 32)
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self.msg_buffer[fn_addr].append((msg.address, msg.busTime, msg.dat, msg.src))
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elif msg.address in self.msg_addrs.values():
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self.msg_buffer[msg.address].append((msg.address, msg.busTime, msg.dat, msg.src))
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def _can_tx(self, tx_addr, dat, bus):
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"""Helper function to send single message"""
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msg = [tx_addr, 0, dat, bus]
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self.sendcan.send(can_list_to_can_capnp([msg], msgtype='sendcan'))
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def _can_rx(self, addr, sub_addr=None):
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"""Helper function to retrieve message with specified address and subadress from buffer"""
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keep_msgs = []
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if sub_addr is None:
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msgs = self.msg_buffer[addr]
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else:
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# Filter based on subadress
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msgs = []
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for m in self.msg_buffer[addr]:
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first_byte = m[2][0]
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if first_byte == sub_addr:
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msgs.append(m)
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else:
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keep_msgs.append(m)
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self.msg_buffer[addr] = keep_msgs
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return msgs
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def _drain_rx(self):
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messaging.drain_sock(self.logcan)
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self.msg_buffer = defaultdict(list)
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def get_data(self, timeout):
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self._drain_rx()
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# Create message objects
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msgs = {}
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request_counter = {}
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request_done = {}
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for tx_addr, rx_addr in self.msg_addrs.items():
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# rx_addr not set when using functional tx addr
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id_addr = rx_addr or tx_addr[0]
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sub_addr = tx_addr[1]
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can_client = CanClient(self._can_tx, partial(self._can_rx, id_addr, sub_addr=sub_addr), tx_addr[0], rx_addr,
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self.bus, sub_addr=sub_addr, debug=self.debug)
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max_len = 8 if sub_addr is None else 7
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msg = IsoTpMessage(can_client, timeout=0, max_len=max_len, debug=self.debug)
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msg.send(self.request[0])
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msgs[tx_addr] = msg
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request_counter[tx_addr] = 0
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request_done[tx_addr] = False
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results = {}
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start_time = time.time()
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while True:
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self.rx()
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if all(request_done.values()):
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break
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for tx_addr, msg in msgs.items():
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dat = msg.recv()
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if not dat:
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continue
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counter = request_counter[tx_addr]
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expected_response = self.response[counter]
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response_valid = dat[:len(expected_response)] == expected_response
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if response_valid:
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if counter + 1 < len(self.request):
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msg.send(self.request[counter + 1])
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request_counter[tx_addr] += 1
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else:
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results[tx_addr] = dat[len(expected_response):]
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request_done[tx_addr] = True
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else:
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request_done[tx_addr] = True
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cloudlog.warning(f"iso-tp query bad response: 0x{bytes.hex(dat)}")
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if time.time() - start_time > timeout:
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break
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return results
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