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45 lines
1.5 KiB
45 lines
1.5 KiB
#!/usr/bin/env python3
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import struct
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import traceback
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import cereal.messaging as messaging
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import panda.python.uds as uds
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from panda.python.uds import FUNCTIONAL_ADDRS
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from selfdrive.car.isotp_parallel_query import IsoTpParallelQuery
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from system.swaglog import cloudlog
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OBD_VIN_REQUEST = b'\x09\x02'
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OBD_VIN_RESPONSE = b'\x49\x02\x01'
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UDS_VIN_REQUEST = bytes([uds.SERVICE_TYPE.READ_DATA_BY_IDENTIFIER]) + struct.pack("!H", uds.DATA_IDENTIFIER_TYPE.VIN)
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UDS_VIN_RESPONSE = bytes([uds.SERVICE_TYPE.READ_DATA_BY_IDENTIFIER + 0x40]) + struct.pack("!H", uds.DATA_IDENTIFIER_TYPE.VIN)
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VIN_UNKNOWN = "0" * 17
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def get_vin(logcan, sendcan, bus, timeout=0.1, retry=5, debug=False):
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for request, response in ((UDS_VIN_REQUEST, UDS_VIN_RESPONSE), (OBD_VIN_REQUEST, OBD_VIN_RESPONSE)):
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for i in range(retry):
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try:
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query = IsoTpParallelQuery(sendcan, logcan, bus, FUNCTIONAL_ADDRS, [request, ], [response, ], functional_addr=True, debug=debug)
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for addr, vin in query.get_data(timeout).items():
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# Honda Bosch response starts with a length, trim to correct length
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if vin.startswith(b'\x11'):
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vin = vin[1:18]
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return addr[0], vin.decode()
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print(f"vin query retry ({i+1}) ...")
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except Exception:
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cloudlog.warning(f"VIN query exception: {traceback.format_exc()}")
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return 0, VIN_UNKNOWN
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if __name__ == "__main__":
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import time
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sendcan = messaging.pub_sock('sendcan')
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logcan = messaging.sub_sock('can')
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time.sleep(1)
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addr, vin = get_vin(logcan, sendcan, 1, debug=False)
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print(hex(addr), vin)
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