USB_ENDPOINT_DESCRIPTOR Struct Reference

A structure representing the standard USB endpoint descriptor. More...

#include <libusbk.h>

Data Fields
UCHAR	bLength
	Size of this descriptor (in bytes)
UCHAR	bDescriptorType
	Descriptor type.
UCHAR	bEndpointAddress
	The address of the endpoint described by this descriptor. More...
UCHAR	bmAttributes
	Attributes which apply to the endpoint when it is configured using the bConfigurationValue. More...
USHORT	wMaxPacketSize
	Maximum packet size this endpoint is capable of sending/receiving.
UCHAR	bInterval
	Interval for polling endpoint for data transfers.

Detailed Description

A structure representing the standard USB endpoint descriptor.

This descriptor is documented in section 9.6.3 of the USB 2.0 specification. All multiple-byte fields are represented in host-endian format.

Field Documentation

UCHAR bEndpointAddress

The address of the endpoint described by this descriptor.

• Bits 0:3 are the endpoint number
• Bits 4:6 are reserved
• Bit 7 indicates direction

UCHAR bmAttributes

Attributes which apply to the endpoint when it is configured using the bConfigurationValue.

• Bits 0:1 determine the transfer type.
• Bits 2:3 are only used for isochronous endpoints and refer to sync type.
• Bits 4:5 are also only used for isochronous endpoints and refer to usage type.
• Bits 6:7 are reserved.

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The documentation for this struct was generated from the following file:

• libusbk.h