def __init__(self, context, device_p):
"""
You should not instanciate this class directly.
Call LibUSBContext methods to receive instances of this class.
"""
# Important: device_p refcount must be incremented before being given
# to this constructor. This class will decrement refcount upon
# destruction.
self.__context = context
self.device_p = device_p
# Fetch device descriptor
device_descriptor = libusb1.libusb_device_descriptor()
result = libusb1.libusb_get_device_descriptor(device_p,
byref(device_descriptor))
if result:
raise libusb1.USBError(result)
self.device_descriptor = device_descriptor
# Fetch all configuration descriptors
self.__configuration_descriptor_list = []
append = self.__configuration_descriptor_list.append
for configuration_id in xrange(device_descriptor.bNumConfigurations):
config = libusb1.libusb_config_descriptor_p()
result = libusb1.libusb_get_config_descriptor(device_p,
configuration_id, byref(config))
if result == libusb1.LIBUSB_ERROR_NOT_FOUND:
# Some devices (ex windows' root hubs) tell they have one
# configuration, but they have no configuration descriptor.
continue
if result:
raise libusb1.USBError(result)
append(config.contents)
def __init__(self, context, device_p):
self.context = context
libusb1.libusb_ref_device(device_p)
self.device_p = device_p
# Fetch device descriptor
device_descriptor = libusb1.libusb_device_descriptor()
result = libusb1.libusb_get_device_descriptor(device_p,
byref(device_descriptor))
if result:
raise libusb1.USBError, result
self.device_descriptor = device_descriptor
# Fetch all configuration descriptors
self.configuration_descriptor_list = []
append = self.configuration_descriptor_list.append
for configuration_id in xrange(device_descriptor.bNumConfigurations):
config = libusb1.libusb_config_descriptor_p()
result = libusb1.libusb_get_config_descriptor(device_p,
configuration_id, byref(config))
if result:
raise libusb1.USBError, result
append(config.contents)