#!/usr/bin/env python3
import unittest
from opendbc.can.parser import CANParser
from opendbc.can.packer import CANPacker
from opendbc.can.tests.test_packer_parser import can_list_to_can_capnp
[docs]
class TestCanChecksums(unittest.TestCase):
[docs]
def test_honda_checksum(self):
"""Test checksums for Honda standard and extended CAN ids"""
dbc_file = "honda_accord_2018_can_generated"
msgs = [("LKAS_HUD", 0), ("LKAS_HUD_A", 0)]
parser = CANParser(dbc_file, msgs, 0)
packer = CANPacker(dbc_file)
values = {
'SET_ME_X41': 0x41,
'STEERING_REQUIRED': 1,
'SOLID_LANES': 1,
'BEEP': 0,
}
# known correct checksums according to the above values
checksum_std = [11, 10, 9, 8]
checksum_ext = [4, 3, 2, 1]
for std, ext in zip(checksum_std, checksum_ext):
msgs = [
packer.make_can_msg("LKAS_HUD", 0, values),
packer.make_can_msg("LKAS_HUD_A", 0, values),
]
can_strings = [can_list_to_can_capnp(msgs), ]
parser.update_strings(can_strings)
self.assertEqual(parser.vl['LKAS_HUD']['CHECKSUM'], std)
self.assertEqual(parser.vl['LKAS_HUD_A']['CHECKSUM'], ext)
if __name__ == "__main__":
unittest.main()