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- #!/usr/bin/env python3
- #
- # This file is part of usb-protocol.
- #
- """ Examples for using the simple descriptor data structures. """
-
- from usb_protocol.types.descriptors import StringDescriptor
- from usb_protocol.emitters.descriptors import DeviceDescriptorEmitter
-
- string_descriptor = bytes([
- 40, # Length
- 3, # Type
- ord('G'), 0x00,
- ord('r'), 0x00,
- ord('e'), 0x00,
- ord('a'), 0x00,
- ord('t'), 0x00,
- ord(' '), 0x00,
- ord('S'), 0x00,
- ord('c'), 0x00,
- ord('o'), 0x00,
- ord('t'), 0x00,
- ord('t'), 0x00,
- ord(' '), 0x00,
- ord('G'), 0x00,
- ord('a'), 0x00,
- ord('d'), 0x00,
- ord('g'), 0x00,
- ord('e'), 0x00,
- ord('t'), 0x00,
- ord('s'), 0x00,
- ])
-
- # Use our simple StringDescriptor object to parse a binary blob string descriptor.
- print(f"Parsing: {string_descriptor}")
- parsed = StringDescriptor.parse(string_descriptor)
- print(parsed)
-
- # Create a simple Device Descriptor via an emitter object.
- # Our object has sane defaults, so we can skip some fields if we want.
- builder = DeviceDescriptorEmitter()
- builder.idVendor = 0x1234
- builder.idProduct = 0xabcd
- builder.bNumConfigurations = 3
- print(f"Generated device descriptor: {builder.emit()}")
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