wip

opendbc/can/tests/test_checksums.py

@@ -0,0 +1,42 @@
+#!/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
+
+
+class TestCanChecksums(unittest.TestCase):
+
+  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()