This interface adds support for CAN controllers by National Instruments.


NI-CAN only seems to support 32-bit architectures so if the driver can’t be loaded on a 64-bit Python, try using a 32-bit version instead.


CAN filtering has not been tested thoroughly and may not work as expected.


class can.interfaces.nican.NicanBus(channel, can_filters=None, bitrate=None, log_errors=True, **kwargs)[source]

The CAN Bus implemented for the NI-CAN interface.


This interface does implement efficient filtering of messages, but the filters have to be set in __init__() using the can_filters parameter. Using set_filters() does not work.

  • channel (str) – Name of the object to open (e.g. “CAN0”)

  • bitrate (Optional[int]) – Bitrate in bit/s

  • can_filters (Optional[Sequence[Union[CanFilter, CanFilterExtended]]]) – See can.BusABC.set_filters().

  • log_errors (bool) – If True, communication errors will appear as CAN messages with is_error_frame set to True and arbitration_id will identify the error (default True)

  • can.CanInterfaceNotImplementedError – If the current operating system is not supported or the driver could not be loaded.

  • can.interfaces.nican.NicanInitializationError – If the bus could not be set up.

exception can.interfaces.nican.NicanError(function, error_code, arguments)[source]

Error from NI-CAN driver.