3 # Contains class definition for USBConfiguration.
5 class USBConfiguration:
6 def __init__(self, configuration_index, configuration_string, interfaces):
7 self.configuration_index = configuration_index
8 self.configuration_string = configuration_string
9 self.configuration_string_index = 0
10 self.interfaces = interfaces
12 def set_configuration_string_index(self, i):
13 self.configuration_string_index = i
15 def get_descriptor(self):
16 interface_descriptors = bytearray()
17 for i in self.interfaces:
18 interface_descriptors += i.get_descriptor()
20 total_len = len(interface_descriptors) + 7
23 7, # length of descriptor in bytes
24 2, # descriptor type 2 == configuration
26 (total_len >> 8) & 0xff,
28 self.configuration_index,
29 self.configuration_string_index
32 return d + interface_descriptors