50 lines
1.8 KiB
Python
Executable File
50 lines
1.8 KiB
Python
Executable File
#!/usr/bin/env python3
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import unittest
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import opendbc.safety.tests.common as common
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from opendbc.car.structs import CarParams
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from opendbc.safety import DLC_TO_LEN
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from opendbc.safety.tests.libsafety import libsafety_py
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from opendbc.safety.tests.test_defaults import TestDefaultRxHookBase
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GM_CAMERA_DIAG_ADDR = 0x24B
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class TestElm327(TestDefaultRxHookBase):
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TX_MSGS = [[addr, bus] for addr in [GM_CAMERA_DIAG_ADDR, *range(0x600, 0x800),
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*range(0x18DA00F1, 0x18DB00F1, 0x100), # 29-bit UDS physical addressing
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*[0x18DB33F1], # 29-bit UDS functional address
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] for bus in range(4)]
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FWD_BUS_LOOKUP = {}
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def setUp(self):
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self.safety = libsafety_py.libsafety
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self.safety.set_safety_hooks(CarParams.SafetyModel.elm327, 0)
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self.safety.init_tests()
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def test_tx_hook(self):
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# ensure we can transmit arbitrary data on allowed addresses
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for bus in range(4):
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for addr in self.SCANNED_ADDRS:
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should_tx = [addr, bus] in self.TX_MSGS
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self.assertEqual(should_tx, self._tx(common.make_msg(bus, addr, 8)))
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# ELM only allows 8 byte UDS/KWP messages under ISO 15765-4
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for msg_len in DLC_TO_LEN:
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should_tx = msg_len == 8
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self.assertEqual(should_tx, self._tx(common.make_msg(0, 0x700, msg_len)))
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# TODO: perform this check for all addresses
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# 4 to 15 are reserved ISO-TP frame types (https://en.wikipedia.org/wiki/ISO_15765-2)
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for byte in range(0xff):
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should_tx = (byte >> 4) <= 3
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self.assertEqual(should_tx, self._tx(common.make_msg(0, GM_CAMERA_DIAG_ADDR, dat=bytes([byte] * 8))))
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def test_tx_hook_on_wrong_safety_mode(self):
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# No point, since we allow many diagnostic addresses
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pass
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if __name__ == "__main__":
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unittest.main()
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