openpilot v0.9.6 release

date: 2024-01-12T10:13:37
master commit: ba792d576a49a0899b88a753fa1c52956bedf9e6

selfdrive/car/fingerprints.py

@@ -0,0 +1,46 @@
+from openpilot.selfdrive.car.interfaces import get_interface_attr
+
+FW_VERSIONS = get_interface_attr('FW_VERSIONS', combine_brands=True, ignore_none=True)
+_FINGERPRINTS = get_interface_attr('FINGERPRINTS', combine_brands=True, ignore_none=True)
+
+_DEBUG_ADDRESS = {1880: 8}   # reserved for debug purposes
+
+
+def is_valid_for_fingerprint(msg, car_fingerprint: dict[int, int]):
+  adr = msg.address
+  # ignore addresses that are more than 11 bits
+  return (adr in car_fingerprint and car_fingerprint[adr] == len(msg.dat)) or adr >= 0x800
+
+
+def eliminate_incompatible_cars(msg, candidate_cars):
+  """Removes cars that could not have sent msg.
+
+     Inputs:
+      msg: A cereal/log CanData message from the car.
+      candidate_cars: A list of cars to consider.
+
+     Returns:
+      A list containing the subset of candidate_cars that could have sent msg.
+  """
+  compatible_cars = []
+
+  for car_name in candidate_cars:
+    car_fingerprints = _FINGERPRINTS[car_name]
+
+    for fingerprint in car_fingerprints:
+      # add alien debug address
+      if is_valid_for_fingerprint(msg, fingerprint | _DEBUG_ADDRESS):
+        compatible_cars.append(car_name)
+        break
+
+  return compatible_cars
+
+
+def all_known_cars():
+  """Returns a list of all known car strings."""
+  return list({*FW_VERSIONS.keys(), *_FINGERPRINTS.keys()})
+
+
+def all_legacy_fingerprint_cars():
+  """Returns a list of all known car strings, FPv1 only."""
+  return list(_FINGERPRINTS.keys())