def __new__(cls, other, channel=None, *args, **kwargs):
"""
Takes the same arguments as :class:`can.BusABC` with the addition of:
:param kwargs:
Should contain a bustype key with a valid interface name.
:raises: NotImplementedError if the bustype isn't recognized
"""
if 'bustype' in kwargs:
can.rc['interface'] = kwargs['bustype']
del kwargs['bustype']
if can.rc['interface'] == 'socketcan':
can.rc['interface'] = choose_socketcan_implementation()
if 'interface' not in can.rc or 'channel' not in can.rc or can.rc[
'interface'] is None:
can.log.debug("Loading default configuration")
# Load defaults
can.rc = load_config()
if can.rc['interface'] not in VALID_INTERFACES:
raise NotImplementedError('Invalid CAN Bus Type - {}'.format(
can.rc['interface']))
# Import the correct Bus backend
interface = can.rc['interface']
if interface == 'kvaser':
from can.interfaces.kvaser import KvaserBus
cls = KvaserBus
elif interface == 'socketcan_ctypes':
from can.interfaces.socketcan_ctypes import SocketcanCtypes_Bus
cls = SocketcanCtypes_Bus
elif interface == 'socketcan_native':
from can.interfaces.socketcan_native import SocketcanNative_Bus
cls = SocketcanNative_Bus
elif interface == 'serial':
from can.interfaces.serial.serial_can import SerialBus
cls = SerialBus
elif interface == 'pcan':
from can.interfaces.pcan import PcanBus
cls = PcanBus
elif interface == 'usb2can':
from can.interfaces.usb2canInterface import Usb2canBus
cls = Usb2canBus
elif interface == 'ixxat':
from can.interfaces.ixxat import IXXATBus
cls = IXXATBus
elif interface == 'virtual':
from can.interfaces.virtual import VirtualBus
cls = VirtualBus
else:
raise NotImplementedError(
"CAN interface '{}' not supported".format(interface))
if channel is None:
channel = can.rc['channel']
return cls(channel, **kwargs)
def __new__(cls, other, channel, *args, **kwargs):
config = load_config(config={'channel': channel})
# Import the correct implementation of CyclicSendTask
if config['interface'] == 'socketcan_ctypes':
from can.interfaces.socketcan.socketcan_ctypes import CyclicSendTask as _ctypesCyclicSendTask
cls = _ctypesCyclicSendTask
elif config['interface'] == 'socketcan_native':
from can.interfaces.socketcan.socketcan_native import CyclicSendTask as _nativeCyclicSendTask
cls = _nativeCyclicSendTask
else:
raise can.CanError(
"Current CAN interface doesn't support CyclicSendTask")
return cls(config['channel'], *args, **kwargs)
def __new__(cls, other, channel=None, *args, **kwargs):
"""
Takes the same arguments as :class:`can.BusABC` with the addition of:
:param kwargs:
Should contain a bustype key with a valid interface name.
:raises:
NotImplementedError if the bustype isn't recognized
:raises:
ValueError if the bustype or channel isn't either passed as an argument
or set in the can.rc config.
"""
config = load_config(config={
'interface': kwargs.get('bustype'),
'channel': channel
})
if 'bustype' in kwargs:
# remove the bustype so it doesn't get passed to the backend
del kwargs['bustype']
interface = config['interface']
channel = config['channel']
# Import the correct Bus backend
try:
(module_name, class_name) = BACKENDS[interface]
except KeyError:
raise NotImplementedError("CAN interface '{}' not supported".format(interface))
try:
module = importlib.import_module(module_name)
except Exception as e:
raise ImportError(
"Cannot import module {} for CAN interface '{}': {}".format(module_name, interface, e)
)
try:
cls = getattr(module, class_name)
except Exception as e:
raise ImportError(
"Cannot import class {} from module {} for CAN interface '{}': {}".format(
class_name, module_name, interface, e
)
)
return cls(channel, **kwargs)
def __new__(cls, other, channel=None, *args, **kwargs):
# Load defaults
can.rc = load_config()
if 'bustype' in kwargs:
can.rc['interface'] = kwargs['bustype']
del kwargs['bustype']
if can.rc['interface'] not in set([
'kvaser', 'serial', 'pcan', 'socketcan_native',
'socketcan_ctypes', 'socketcan'
]):
raise NotImplementedError('Invalid CAN Bus Type - {}'.format(
can.rc['interface']))
if can.rc['interface'] == 'socketcan':
can.rc['interface'] = choose_socketcan_implementation()
# Import the correct backend
if can.rc['interface'] == 'kvaser':
from can.interfaces.kvaser import KvaserBus
cls = KvaserBus
elif can.rc['interface'] == 'socketcan_ctypes':
from can.interfaces.socketcan_ctypes import SocketscanCtypes_Bus
cls = SocketscanCtypes_Bus
elif can.rc['interface'] == 'socketcan_native':
from can.interfaces.socketcan_native import SocketscanNative_Bus
cls = SocketscanNative_Bus
elif can.rc['interface'] == 'serial':
from can.interfaces.serial_can import SerialBus
cls = SerialBus
elif can.rc['interface'] == 'pcan':
from can.interfaces.pcan import PcanBus
cls = PcanBus
else:
raise NotImplementedError("CAN Interface Not Found")
if channel is None:
channel = can.rc['channel']
return cls(channel, **kwargs)
def __new__(cls, other, channel, *args, **kwargs):
if 'bustype' in kwargs:
if kwargs['bustype'] == 'kvaser':
can.rc['interface'] = 'kvaser'
cls = KvaserBus
elif kwargs['bustype'] == 'socketcan_ctypes':
can.rc['interface'] = 'socketcan_ctypes'
elif kwargs['bustype'] == 'socketcan_native':
can.rc['interface'] = 'socketcan_native'
elif kwargs['bustype'] == 'socketcan':
try:
import fcntl
can.rc['interface'] = 'socketcan_native'
except ImportError:
can.rc['interface'] = 'socketcan_ctypes'
elif kwargs['bustype'] =='serial':
can.rc['interface'] = 'serial'
cls = SerialBus
elif kwargs['bustype'] =='pcan':
can.rc['interface'] = 'pcan'
cls = PcanBus
else:
raise NotImplementedError('Invalid CAN Bus Type.')
del kwargs['bustype']
else:
can.rc = load_config()
if can.rc['interface'] == 'kvaser':
cls = KvaserBus
elif can.rc['interface'] == 'socketcan_ctypes':
cls = SocketscanCtypes_Bus
elif can.rc['interface'] == 'socketcan_native':
cls = SocketscanNative_Bus
elif can.rc['interface'] =='serial':
cls = SerialBus
elif can.rc['interface'] =='pcan':
cls = PcanBus
else:
raise NotImplementedError("CAN Interface Not Found")
return cls(channel, **kwargs)
def __new__(cls, other, channel, *args, **kwargs):
if 'bustype' in kwargs:
if kwargs['bustype'] == 'kvaser':
can.rc['interface'] = 'kvaser'
cls = KvaserBus
elif kwargs['bustype'] == 'socketcan_ctypes':
can.rc['interface'] = 'socketcan_ctypes'
elif kwargs['bustype'] == 'socketcan_native':
can.rc['interface'] = 'socketcan_native'
elif kwargs['bustype'] == 'socketcan':
try:
import fcntl
can.rc['interface'] = 'socketcan_native'
except ImportError:
can.rc['interface'] = 'socketcan_ctypes'
elif kwargs['bustype'] == 'serial':
can.rc['interface'] = 'serial'
cls = SerialBus
elif kwargs['bustype'] == 'pcan':
can.rc['interface'] = 'pcan'
cls = PcanBus
else:
raise NotImplementedError('Invalid CAN Bus Type.')
del kwargs['bustype']
else:
can.rc = load_config()
if can.rc['interface'] == 'kvaser':
cls = KvaserBus
elif can.rc['interface'] == 'socketcan_ctypes':
cls = SocketscanCtypes_Bus
elif can.rc['interface'] == 'socketcan_native':
cls = SocketscanNative_Bus
elif can.rc['interface'] == 'serial':
cls = SerialBus
elif can.rc['interface'] == 'pcan':
cls = PcanBus
else:
raise NotImplementedError("CAN Interface Not Found")
return cls(channel, **kwargs)
def __new__(cls, other, channel, *args, **kwargs):
config = load_config(config={'channel': channel})
# Import the correct implementation of CyclicSendTask
if config['interface'] == 'socketcan_ctypes':
from can.interfaces.socketcan.socketcan_ctypes import CyclicSendTask as _ctypesCyclicSendTask
cls = _ctypesCyclicSendTask
elif config['interface'] == 'socketcan_native':
from can.interfaces.socketcan.socketcan_native import CyclicSendTask as _nativeCyclicSendTask
cls = _nativeCyclicSendTask
# CyclicSendTask has not been fully implemented on remote interface yet.
# Waiting for issue #80 which will change the API to make it easier for
# interfaces other than socketcan to implement it
#elif can.rc['interface'] == 'remote':
# from can.interfaces.remote import CyclicSendTask as _remoteCyclicSendTask
# cls = _remoteCyclicSendTask
else:
raise can.CanError(
"Current CAN interface doesn't support CyclicSendTask")
return cls(config['channel'], *args, **kwargs)
def __new__(cls, other, channel=None, *args, **kwargs):
# Load defaults
can.rc = load_config()
if 'bustype' in kwargs:
can.rc['interface'] = kwargs['bustype']
del kwargs['bustype']
if can.rc['interface'] not in set(['kvaser', 'serial', 'pcan', 'socketcan_native', 'socketcan_ctypes', 'socketcan']):
raise NotImplementedError('Invalid CAN Bus Type - {}'.format(can.rc['interface']))
if can.rc['interface'] == 'socketcan':
can.rc['interface'] = choose_socketcan_implementation()
# Import the correct backend
if can.rc['interface'] == 'kvaser':
from can.interfaces.kvaser import KvaserBus
cls = KvaserBus
elif can.rc['interface'] == 'socketcan_ctypes':
from can.interfaces.socketcan_ctypes import SocketscanCtypes_Bus
cls = SocketscanCtypes_Bus
elif can.rc['interface'] == 'socketcan_native':
from can.interfaces.socketcan_native import SocketscanNative_Bus
cls = SocketscanNative_Bus
elif can.rc['interface'] == 'serial':
from can.interfaces.serial_can import SerialBus
cls = SerialBus
elif can.rc['interface'] == 'pcan':
from can.interfaces.pcan import PcanBus
cls = PcanBus
else:
raise NotImplementedError("CAN Interface Not Found")
if channel is None:
channel = can.rc['channel']
return cls(channel, **kwargs)
def __new__(cls, other, channel, *args, **kwargs):
# If can.rc doesn't look valid: load default
if 'interface' not in can.rc or 'channel' not in can.rc:
can.log.debug("Loading default configuration")
can.rc = load_config()
print(can.rc)
if can.rc['interface'] not in VALID_INTERFACES:
raise NotImplementedError('Invalid CAN Bus Type - {}'.format(
can.rc['interface']))
# Import the correct implementation of CyclicSendTask
if can.rc['interface'] == 'socketcan_ctypes':
from can.interfaces.socketcan_ctypes import CyclicSendTask as _ctypesCyclicSendTask
cls = _ctypesCyclicSendTask
elif can.rc['interface'] == 'socketcan_native':
from can.interfaces.socketcan_native import CyclicSendTask as _nativeCyclicSendTask
cls = _nativeCyclicSendTask
else:
can.log.info(
"Current CAN interface doesn't support CyclicSendTask")
return cls(channel, *args, **kwargs)
"""
can is an object-orient Controller Area Network interface module.
Modules include:
:mod:`can.message`
defines the :class:`~can.Message` class which is the
lowest level of OO access to the library.
"""
import logging
log = logging.getLogger('can')
class CanError(IOError):
pass
from can.CAN import BufferedReader, Listener, Printer, CSVWriter, SqliteWriter, set_logging_level
from can.message import Message
from can.bus import BusABC
from can.notifier import Notifier
from can.broadcastmanager import send_periodic, CyclicSendTaskABC, MultiRateCyclicSendTaskABC
from can.util import load_config
log.debug("Loading can configuration")
rc = load_config()
log.debug("RC: {}".format(rc))
from can.interfaces import interface
