def managed_set_configuration(self, device, config):
if config is None:
cfg = device[0]
elif isinstance(config, Configuration):
cfg = config
elif config == 0: # unconfigured state
class MockConfiguration(object):
def __init__(self):
self.index = None
self.bConfigurationValue = 0
cfg = MockConfiguration()
else:
cfg = util.find_descriptor(device, bConfigurationValue=config)
if cfg is None:
raise ValueError("Invalid configuration " + str(config))
self.managed_open()
self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
# cache the index instead of the object to avoid cyclic references
# of the device and Configuration (Device tracks the _ResourceManager,
# which tracks the Configuration, which tracks the Device)
self._active_cfg_index = cfg.index
self._ep_info.clear()
def managed_set_configuration(self, device, config):
if config is None:
cfg = device[0]
elif isinstance(config, Configuration):
cfg = config
elif config == 0: # unconfigured state
class MockConfiguration(object):
def __init__(self):
self.index = None
self.bConfigurationValue = 0
cfg = MockConfiguration()
else:
cfg = util.find_descriptor(device, bConfigurationValue=config)
if cfg is None:
raise ValueError("Invalid configuration " + str(config))
self.managed_open()
self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
# cache the index instead of the object to avoid cyclic references
# of the device and Configuration (Device tracks the _ResourceManager,
# which tracks the Configuration, which tracks the Device)
self._active_cfg_index = cfg.index
self._ep_info.clear()
def managed_set_interface(self, device, intf, alt):
if isinstance(intf, Interface):
i = intf
else:
cfg = self.get_active_configuration(device)
if intf is None:
intf = cfg[(0,0)].bInterfaceNumber
if alt is not None:
i = util.find_descriptor(cfg, bInterfaceNumber=intf, bAlternateSetting=alt)
else:
i = util.find_descriptor(cfg, bInterfaceNumber=intf)
self.managed_claim_interface(device, i)
if alt is None:
alt = i.bAlternateSetting
self.backend.set_interface_altsetting(self.handle, i.bInterfaceNumber, alt)
def managed_set_interface(self, device, intf, alt):
if isinstance(intf, Interface):
i = intf
else:
cfg = self.get_active_configuration(device)
if intf is None:
intf = cfg[(0,0)].bInterfaceNumber
if alt is not None:
i = util.find_descriptor(cfg, bInterfaceNumber=intf, bAlternateSetting=alt)
else:
i = util.find_descriptor(cfg, bInterfaceNumber=intf)
self.managed_claim_interface(device, i)
if alt is None:
alt = i.bAlternateSetting
self.backend.set_interface_altsetting(self.handle, i.bInterfaceNumber, alt)
def get_interface_and_endpoint(self, device, endpoint_address):
try:
return self._ep_info[endpoint_address]
except KeyError:
for intf in self.get_active_configuration(device):
ep = util.find_descriptor(intf, bEndpointAddress=endpoint_address)
if ep is not None:
self._ep_info[endpoint_address] = (intf, ep)
return intf, ep
raise ValueError('Invalid endpoint address ' + hex(endpoint_address))
def get_interface_and_endpoint(self, device, endpoint_address):
try:
return self._ep_info[endpoint_address]
except KeyError:
for intf in self.get_active_configuration(device):
ep = util.find_descriptor(intf, bEndpointAddress=endpoint_address)
if ep is not None:
self._ep_info[endpoint_address] = (intf, ep)
return intf, ep
raise ValueError('Invalid endpoint address ' + hex(endpoint_address))
def get_active_configuration(self, device):
if self._active_cfg_index is None:
self.managed_open()
cfg = util.find_descriptor(
device,
bConfigurationValue=self.backend.get_configuration(self.handle)
)
if cfg is None:
raise USBError('Configuration not set')
self._active_cfg_index = cfg.index
return cfg
return device[self._active_cfg_index]
def get_active_configuration(self, device):
if self._active_cfg_index is None:
self.managed_open()
cfg = util.find_descriptor(
device,
bConfigurationValue=self.backend.get_configuration(self.handle)
)
if cfg is None:
raise USBError('Configuration not set')
self._active_cfg_index = cfg.index
return cfg
return device[self._active_cfg_index]
