class SyncHassebDALIUSBDriver(HassebDALIUSBDriver, SyncDALIDriver):
"""Synchronous ``DALIDriver`` implementation for Hasseb DALI USB device.
"""
def __init__(self, bus=None, port_numbers=None, interface=0):
self.backend = USBBackend(HASSEB_USB_VENDOR,
HASSEB_USB_PRODUCT,
bus=bus,
port_numbers=port_numbers,
interface=interface)
def send(self, command, timeout=2000):
self.backend.write(self.construct(command))
frame = None
backoff = 0.010
if command.response is not None:
for i in range(7):
frame = self.extract(self.backend.read(timeout=timeout))
if isinstance(frame, HassebDALIUSBNoAnswer):
self.backend.write(self.construct(command))
if isinstance(frame, BackwardFrame):
if command.response:
return command.response(frame)
return frame
backoff += backoff
sleep(backoff)
raise MissingResponse()
return None
class SyncTridonicDALIUSBDriver(TridonicDALIUSBDriver, SyncDALIDriver):
"""Synchronous ``DALIDriver`` implementation for Tridonic DALI USB device.
"""
def __init__(self, bus=None, port_numbers=None, interface=0):
self.backend = USBBackend(
DALI_USB_VENDOR,
DALI_USB_PRODUCT,
bus=bus,
port_numbers=port_numbers,
interface=interface
)
def send(self, command, timeout=None):
self.backend.write(self.construct(command))
frame = None
# For now read up to 2 frames. This may not be reliable if forward
# frames are passed between request and response from DALI side.
# though this may not happen at all due to DALI USB implementation
# details.
for i in range(2):
frame = self.extract(self.backend.read(timeout=timeout))
if isinstance(frame, BackwardFrame):
if command.response:
return command.response(frame)
return frame
return DALI_USB_NO_RESPONSE
class SyncTridonicDALIUSBDriver(TridonicDALIUSBDriver, SyncDALIDriver):
"""Synchronous ``DALIDriver`` implementation for Tridonic DALI USB device.
"""
def __init__(self, bus=None, port_numbers=None, interface=0):
self.backend = USBBackend(DALI_USB_VENDOR,
DALI_USB_PRODUCT,
bus=bus,
port_numbers=port_numbers,
interface=interface)
def send(self, command, timeout=None):
self.backend.write(self.construct(command))
frame = None
# For now read up to 2 frames. This may not be reliable if forward
# frames are passed between request and response from DALI side.
# though this may not happen at all due to DALI USB implementation
# details.
for i in range(2):
frame = self.extract(self.backend.read(timeout=timeout))
if isinstance(frame, BackwardFrame):
if command.response:
return command.response(frame)
return frame
return DALI_USB_NO_RESPONSE