USB_INTERFACE_DESCRIPTOR structure
The USB_INTERFACE_DESCRIPTOR structure is used by USB client drivers to retrieve a USB-defined interface descriptor.
Syntax
typedef struct _USB_INTERFACE_DESCRIPTOR { UCHAR bLength; UCHAR bDescriptorType; UCHAR bInterfaceNumber; UCHAR bAlternateSetting; UCHAR bNumEndpoints; UCHAR bInterfaceClass; UCHAR bInterfaceSubClass; UCHAR bInterfaceProtocol; UCHAR iInterface; } USB_INTERFACE_DESCRIPTOR, *PUSB_INTERFACE_DESCRIPTOR;
Members
- bLength
-
The length, in bytes, of the descriptor.
- bDescriptorType
-
The descriptor type. bDescriptor must be set to USB_INTERFACE_DESCRIPTOR_TYPE.
- bInterfaceNumber
-
The index number of the interface.
- bAlternateSetting
-
The index number of the alternate setting of the interface.
- bNumEndpoints
-
The number of endpoints that are used by the interface, excluding the default status endpoint.
- bInterfaceClass
-
The class code of the device that the USB specification group assigned.
- bInterfaceSubClass
-
The subclass code of the device that the USB specification group assigned.
- bInterfaceProtocol
-
The protocol code of the device that the USB specification group assigned.
- iInterface
-
The index of a string descriptor that describes the interface. For information about this field, see section 9.6.5 in the "Universal Serial Bus Revision 2.0" specification at USB Technology.
Requirements
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See also
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Build date: 12/5/2013
