New BusState members per #736

CONTRIBUTORS.txt

@@ -92,3 +92,4 @@ Felix Nieuwenhuizen
 @SWolfSchunk
 @belliriccardo
 @cssedev
+@bggardner

can/bus.py

@@ -35,9 +35,11 @@
 class BusState(Enum):
     """The state in which a :class:`can.BusABC` can be."""
 
-    ACTIVE = auto()
-    PASSIVE = auto()
-    ERROR = auto()
+    ERROR_ACTIVE = auto()
+    ERROR_PASSIVE = auto()
+    BUS_OFF = auto()
+    STOPPED = auto()
+    UNKNOWN = auto()
 
 
 class CanProtocol(Enum):
@@ -510,7 +512,7 @@ def state(self) -> BusState:
         """
         Return the current state of the hardware
         """
-        return BusState.ACTIVE
+        return BusState.ERROR_ACTIVE
 
     @state.setter
     def state(self, new_state: BusState) -> None:

can/interfaces/etas/__init__.py

@@ -278,14 +278,14 @@ def state(self) -> can.BusState:
         status = OCI_CANControllerStatus()
         OCI_GetCANControllerStatus(self.ctrl, ctypes.byref(status))
         if status.stateCode & OCI_CAN_STATE_ACTIVE:
-            return can.BusState.ACTIVE
+            return can.BusState.ERROR_ACTIVE
         elif status.stateCode & OCI_CAN_STATE_PASSIVE:
-            return can.BusState.PASSIVE
+            return can.BusState.ERROR_PASSIVE
 
     @state.setter
     def state(self, new_state: can.BusState) -> None:
         # disabled, OCI_AdaptCANConfiguration does not allow changing the bus mode
-        # if new_state == can.BusState.ACTIVE:
+        # if new_state == can.BusState.ERROR_ACTIVE:
         #     self.ctrlConf.busParticipationMode = OCI_BUSMODE_ACTIVE
         # else:
         #     self.ctrlConf.busParticipationMode = OCI_BUSMODE_PASSIVE

can/interfaces/ixxat/canlib_vcinpl.py

@@ -849,19 +849,19 @@ def state(self) -> BusState:
         status = structures.CANLINESTATUS()
         _canlib.canControlGetStatus(self._control_handle, ctypes.byref(status))
         if status.bOpMode == constants.CAN_OPMODE_LISTONLY:
-            return BusState.PASSIVE
+            return BusState.ERROR_PASSIVE
 
         error_byte_1 = status.dwStatus & 0x0F
         # CAN_STATUS_BUSOFF = 0x08  # bus off status
         if error_byte_1 & constants.CAN_STATUS_BUSOFF:
-            return BusState.ERROR
+            return BusState.BUS_OFF
 
         error_byte_2 = status.dwStatus & 0xF0
         # CAN_STATUS_BUSCERR  = 0x20  # bus coupling error
         if error_byte_2 & constants.CAN_STATUS_BUSCERR:
-            return BusState.ERROR
+            return BusState.STOPPED
 
-        return BusState.ACTIVE
+        return BusState.ERROR_ACTIVE
 
 
 # ~class IXXATBus(BusABC): ---------------------------------------------------

can/interfaces/pcan/pcan.py

@@ -121,7 +121,7 @@ def __init__(
         self,
         channel: str = "PCAN_USBBUS1",
         device_id: Optional[int] = None,
-        state: BusState = BusState.ACTIVE,
+        state: BusState = BusState.ERROR_ACTIVE,
         timing: Optional[Union[BitTiming, BitTimingFd]] = None,
         bitrate: int = 500000,
         receive_own_messages: bool = False,
@@ -268,7 +268,7 @@ def __init__(
 
         self.check_api_version()
 
-        if state in [BusState.ACTIVE, BusState.PASSIVE]:
+        if state in [BusState.ERROR_ACTIVE, BusState.ERROR_PASSIVE]:
             self.state = state
         else:
             raise ValueError("BusState must be Active or Passive")
@@ -699,12 +699,12 @@ def state(self, new_state):
         # declare here, which is called by __init__()
         self._state = new_state  # pylint: disable=attribute-defined-outside-init
 
-        if new_state is BusState.ACTIVE:
+        if new_state is BusState.ERROR_ACTIVE:
             self.m_objPCANBasic.SetValue(
                 self.m_PcanHandle, PCAN_LISTEN_ONLY, PCAN_PARAMETER_OFF
             )
 
-        elif new_state is BusState.PASSIVE:
+        elif new_state is BusState.ERROR_PASSIVE:
             # When this mode is set, the CAN controller does not take part on active events (eg. transmit CAN messages)
             # but stays in a passive mode (CAN monitor), in which it can analyse the traffic on the CAN bus used by a
             # PCAN channel. See also the Philips Data Sheet "SJA1000 Stand-alone CAN controller".

can/interfaces/systec/ucanbus.py

@@ -120,8 +120,8 @@ def __init__(self, channel, can_filters=None, **kwargs):
         if bitrate not in self.BITRATES:
             raise ValueError(f"Invalid bitrate {bitrate}")
 
-        state = kwargs.get("state", BusState.ACTIVE)
-        if state is BusState.ACTIVE or state is BusState.PASSIVE:
+        state = kwargs.get("state", BusState.ERROR_ACTIVE)
+        if state is BusState.ERROR_ACTIVE or state is BusState.ERROR_PASSIVE:
             self._state = state
         else:
             raise ValueError("BusState must be Active or Passive")
@@ -130,7 +130,7 @@ def __init__(self, channel, can_filters=None, **kwargs):
         self._params = {
             "mode": Mode.MODE_NORMAL
             | (Mode.MODE_TX_ECHO if kwargs.get("receive_own_messages") else 0)
-            | (Mode.MODE_LISTEN_ONLY if state is BusState.PASSIVE else 0),
+            | (Mode.MODE_LISTEN_ONLY if state is BusState.ERROR_PASSIVE else 0),
             "BTR": self.BITRATES[bitrate],
         }
         # get extra parameters
@@ -306,14 +306,14 @@ def state(self):
 
     @state.setter
     def state(self, new_state):
-        if self._state is not BusState.ERROR and (
-            new_state is BusState.ACTIVE or new_state is BusState.PASSIVE
+        if self._state is not BusState.STOPPED and (
+            new_state is BusState.ERROR_ACTIVE or new_state is BusState.ERROR_PASSIVE
         ):
             try:
                 # close the CAN channel
                 self._ucan.shutdown(self.channel, False)
                 # set mode
-                if new_state is BusState.ACTIVE:
+                if new_state is BusState.ERROR_ACTIVE:
                     self._params["mode"] &= ~Mode.MODE_LISTEN_ONLY
                 else:
                     self._params["mode"] |= Mode.MODE_LISTEN_ONLY

can/logger.py

@@ -281,9 +281,9 @@ def main() -> None:
     bus = _create_bus(results, **additional_config)
 
     if results.active:
-        bus.state = BusState.ACTIVE
+        bus.state = BusState.ERROR_ACTIVE
     elif results.passive:
-        bus.state = BusState.PASSIVE
+        bus.state = BusState.ERROR_PASSIVE
 
     print(f"Connected to {bus.__class__.__name__}: {bus.channel_info}")
     print(f"Can Logger (Started on {datetime.now()})")

doc/interfaces/pcan.rst

@@ -15,7 +15,7 @@ Here is an example configuration file for using `PCAN-USB <https://www.peak-syst
     [default]
     interface = pcan
     channel = PCAN_USBBUS1
-    state = can.bus.BusState.PASSIVE
+    state = can.bus.BusState.ERROR_PASSIVE
     bitrate = 500000
 
 ``channel`` (default ``"PCAN_USBBUS1"``)
@@ -31,7 +31,7 @@ Here is an example configuration file for using `PCAN-USB <https://www.peak-syst
 
  Where ``x`` should be replaced with the desired channel number starting at ``1``.
 
-``state`` (default ``can.bus.BusState.ACTIVE``)
+``state`` (default ``can.bus.BusState.ERROR_ACTIVE``)
  BusState of the channel
 
 ``bitrate`` (default ``500000``)

doc/interfaces/systec.rst

@@ -48,7 +48,7 @@ Optional parameters:
 * ``device_number`` (default first device) The device number of the USB-CAN
 * ``rx_buffer_entries`` (default 4096) The maximum number of entries in the receive buffer
 * ``tx_buffer_entries`` (default 4096) The maximum number of entries in the transmit buffer
-* ``state`` (default BusState.ACTIVE) BusState of the channel
+* ``state`` (default BusState.ERROR_ACTIVE) BusState of the channel
 * ``receive_own_messages`` (default False) If messages transmitted should also be received back
 
 

examples/receive_all.py

@@ -16,7 +16,7 @@ def receive_all():
     with can.Bus() as bus:
         # set to read-only, only supported on some interfaces
         try:
-            bus.state = BusState.PASSIVE
+            bus.state = BusState.ERROR_PASSIVE
         except NotImplementedError:
             pass
 

test/test_logger.py

@@ -71,7 +71,7 @@ def test_log_virtual_active(self):
         can.logger.main()
         self.assertSuccessfullCleanup()
         self.mock_logger.assert_called_once()
-        self.assertEqual(self.mock_virtual_bus.state, can.BusState.ACTIVE)
+        self.assertEqual(self.mock_virtual_bus.state, can.BusState.ERROR_ACTIVE)
 
     def test_log_virtual_passive(self):
         self.mock_virtual_bus.recv = Mock(side_effect=[self.testmsg, KeyboardInterrupt])
@@ -80,7 +80,7 @@ def test_log_virtual_passive(self):
         can.logger.main()
         self.assertSuccessfullCleanup()
         self.mock_logger.assert_called_once()
-        self.assertEqual(self.mock_virtual_bus.state, can.BusState.PASSIVE)
+        self.assertEqual(self.mock_virtual_bus.state, can.BusState.ERROR_PASSIVE)
 
     def test_log_virtual_with_config(self):
         self.mock_virtual_bus.recv = Mock(side_effect=[self.testmsg, KeyboardInterrupt])

test/test_pcan.py

@@ -367,8 +367,8 @@ def test_shutdown(self) -> None:
 
     @parameterized.expand(
         [
-            ("active", BusState.ACTIVE, PCAN_PARAMETER_OFF),
-            ("passive", BusState.PASSIVE, PCAN_PARAMETER_ON),
+            ("active", BusState.ERROR_ACTIVE, PCAN_PARAMETER_OFF),
+            ("passive", BusState.ERROR_PASSIVE, PCAN_PARAMETER_ON),
         ]
     )
     def test_state(self, name, bus_state: BusState, expected_parameter) -> None:
@@ -384,7 +384,7 @@ def test_state(self, name, bus_state: BusState, expected_parameter) -> None:
             )
 
     def test_state_constructor(self):
-        for state in [BusState.ACTIVE, BusState.PASSIVE]:
+        for state in [BusState.ERROR_ACTIVE, BusState.ERROR_PASSIVE]:
             bus = can.Bus(interface="pcan", state=state)
             assert bus.state == state
 

test/test_systec.py

@@ -218,7 +218,7 @@ def test_receive_own_messages():
     @staticmethod
     def test_bus_passive_state():
         ucan.UcanInitCanEx2.reset_mock()
-        bus = can.Bus(interface="systec", channel=0, state=can.BusState.PASSIVE)
+        bus = can.Bus(interface="systec", channel=0, state=can.BusState.ERROR_PASSIVE)
         ucan.UcanInitCanEx2.assert_called_once_with(
             bus._ucan._handle,
             0,