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インターフェイスディスクリプタ

bInterfaceProtocol

Top / bInterfaceProtocol

HID

• A variety of protocols are supported HID devices. The bInterfaceProtocol member of an Interface descriptor only has meaning if the bInterfaceSubClass member declares that the device supports a boot interface, otherwise it is 0.

  Protocol Code	Description
  0	None
  1	Keyboard
  2	Mouse
  3 - 255	Reserved

USB 2.0/仕様

• Protocol code (assigned by the USB).These codes are qualified by the value of the bInterfaceClass and the bInterfaceSubClass fields. If an interface supports class-specific requests, this code identifies the protocols that the device uses as defined by the specification of the device class.
• If this field is reset to zero, the device does not use a class-specific protocol on this interface.
• If this field is set to FFH, the device uses a vendor-specific protocol for this interface.