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"""

Interfaces contain low level implementations that interact with CAN hardware.

"""

# interface_name => (module, classname)

BACKENDS = {

"kvaser": ("can.interfaces.kvaser", "KvaserBus"),

"socketcan": ("can.interfaces.socketcan", "SocketcanBus"),

"serial": ("can.interfaces.serial.serial_can", "SerialBus"),

"pcan": ("can.interfaces.pcan", "PcanBus"),

"usb2can": ("can.interfaces.usb2can", "Usb2canBus"),

"ixxat": ("can.interfaces.ixxat", "IXXATBus"),

"nican": ("can.interfaces.nican", "NicanBus"),

"iscan": ("can.interfaces.iscan", "IscanBus"),

"virtual": ("can.interfaces.virtual", "VirtualBus"),

"udp_multicast": ("can.interfaces.udp_multicast", "UdpMulticastBus"),

"neovi": ("can.interfaces.ics_neovi", "NeoViBus"),

"vector": ("can.interfaces.vector", "VectorBus"),

"slcan": ("can.interfaces.slcan", "slcanBus"),

"robotell": ("can.interfaces.robotell", "robotellBus"),

"canalystii": ("can.interfaces.canalystii", "CANalystIIBus"),

"systec": ("can.interfaces.systec", "UcanBus"),

"seeedstudio": ("can.interfaces.seeedstudio", "SeeedBus"),

"cantact": ("can.interfaces.cantact", "CantactBus"),

"gs_usb": ("can.interfaces.gs_usb", "GsUsbBus"),

"nixnet": ("can.interfaces.nixnet", "NiXNETcanBus"),

"neousys": ("can.interfaces.neousys", "NeousysBus"),

"etas": ("can.interfaces.etas", "EtasBus"),

"socketcand": ("can.interfaces.socketcand", "SocketCanDaemonBus"),

}

try:

from importlib.metadata import entry_points

try:

entries = entry_points(group="can.interface")

except TypeError:

# Fallback for Python <3.10

# See https://docs.python.org/3/library/importlib.metadata.html#entry-points, "Compatibility Note"

entries = entry_points().get("can.interface", [])

BACKENDS.update(

{interface.name: tuple(interface.value.split(":")) for interface in entries}

)

except ImportError:

from pkg_resources import iter_entry_points

entry = iter_entry_points("can.interface")

BACKENDS.update(

{

interface.name: (interface.module_name, interface.attrs[0])

for interface in entry

}

)

VALID_INTERFACES = frozenset(BACKENDS.keys())