NI-CAN

This interface adds support for CAN controllers by National Instruments.

Warning

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.

Warning

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

Bus

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

Bases: can.bus.BusABC

The CAN Bus implemented for the NI-CAN interface.

Warning

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.

Parameters:

• channel (str) – Name of the object to open (e.g. ‘CAN0’)
• bitrate (int) – Bitrate in bits/s
• can_filters (list) – 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)

Raises:

can.interfaces.nican.NicanError – If starting communication fails

flush_tx_buffer()

Resets the CAN chip which includes clearing receive and transmit queues.

send(msg, timeout=None)

Send a message to NI-CAN.

Parameters:msg (can.Message) – Message to send Raises:can.interfaces.nican.NicanError – If writing to transmit buffer fails. It does not wait for message to be ACKed currently.

set_filters(can_filers=None)

Unsupported. See note on NicanBus.

shutdown()

Close object.

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

Bases: can.CanError

Error from NI-CAN driver.

arguments = None

Arguments passed to function

error_code = None

Status code

function = None

Function that failed