4aeef100f6
* Introduce a python script to generate the USB descriptor instead of a bunch of C macros. In the future, we can use this dynamically in CircuitPython. * Add support for detecting read-only mass storage mounts. Fixes #377
53 lines
1.4 KiB
Python
53 lines
1.4 KiB
Python
from . import core
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import struct
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class FunctionalDescriptor(core.Descriptor):
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bDescriptorType = 0x24
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.fmt = "<BBB" + self.fmt[3:]
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def __bytes__(self):
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return struct.pack(self.fmt, self.bLength, self.bDescriptorType, self.bDescriptorSubtype, *self.data)
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class Header(FunctionalDescriptor):
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fields = [('bcdCDC', "H", None)]
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bLength = 0x05
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bDescriptorSubtype = 0x0
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class CallManagement(FunctionalDescriptor):
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fields = [('bmCapabilities', "b", None),
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('bDataInterface', "b", None)]
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bLength = 0x05
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bDescriptorSubtype = 0x01
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class AbstractControlManagement(FunctionalDescriptor):
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fields = [('bmCapabilities', "b", None)]
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bLength = 0x04
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bDescriptorSubtype = 0x02
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class DirectLineManagement(FunctionalDescriptor):
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fields = [('bmCapabilities', "b", None)]
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bLength = 0x04
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bDescriptorSubtype = 0x03
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class Union(FunctionalDescriptor):
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fields = [('bMasterInterface', "b", None)]
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bDescriptorSubtype = 0x06
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def __init__(self, *args, **kwargs):
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self.bSlaveInterface = kwargs["bSlaveInterface"]
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super().__init__(*args, **kwargs)
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def __bytes__(self):
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return super().__bytes__() + bytes(self.bSlaveInterface)
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@property
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def bLength(self):
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return 0x4 + len(self.bSlaveInterface)
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