libusb_endpoint_descriptor Struct Reference

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

#include <libusb.h>

Data Fields
uint8_t	bLength
	Size of this descriptor (in bytes)
uint8_t	bDescriptorType
	Descriptor type.
uint8_t	bEndpointAddress
	The address of the endpoint described by this descriptor.
uint8_t	bmAttributes
	Attributes which apply to the endpoint when it is configured using the bConfigurationValue.
uint16_t	wMaxPacketSize
	Maximum packet size this endpoint is capable of sending/receiving.
uint8_t	bInterval
	Interval for polling endpoint for data transfers.
uint8_t	bRefresh
	For audio devices only: the rate at which synchronization feedback is provided.
uint8_t	bSynchAddress
	For audio devices only: the address if the synch endpoint.
const unsigned char *	extra
	Extra descriptors.
int	extra_length
	Length of the extra descriptors, in bytes.

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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.

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Field Documentation

uint8_t libusb_endpoint_descriptor::bDescriptorType

Descriptor type.

Will have value libusb_descriptor_type::LIBUSB_DT_ENDPOINT LIBUSB_DT_ENDPOINT in this context.

uint8_t libusb_endpoint_descriptor::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, see libusb_endpoint_direction.

uint8_t libusb_endpoint_descriptor::bmAttributes

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

Bits 0:1 determine the transfer type and correspond to libusb_transfer_type. Bits 2:3 are only used for isochronous endpoints and correspond to libusb_iso_sync_type. Bits 4:5 are also only used for isochronous endpoints and correspond to libusb_iso_usage_type. Bits 6:7 are reserved.

uint16_t libusb_endpoint_descriptor::wMaxPacketSize

Maximum packet size this endpoint is capable of sending/receiving.

uint8_t libusb_endpoint_descriptor::bInterval

Interval for polling endpoint for data transfers.

uint8_t libusb_endpoint_descriptor::bRefresh

For audio devices only: the rate at which synchronization feedback is provided.

const unsigned char* libusb_endpoint_descriptor::extra

Extra descriptors.

If libusb encounters unknown endpoint descriptors, it will store them here, should you wish to parse them.

int libusb_endpoint_descriptor::extra_length

Length of the extra descriptors, in bytes.

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

• libusb.h