libusb_endpoint_descriptor - syntax, references, description

Syntax

struct libusb_endpoint_descriptor { uint8_t bLength; uint8_t bDescriptorType; uint8_t bEndpointAddress; uint8_t bmAttributes; uint16_t wMaxPacketSize; uint8_t bInterval; uint8_t bRefresh; uint8_t bSynchAddress; const unsigned char *extra; int extra_length; };

Fields

bLength

Size of this descriptor (in bytes). Read more...

bDescriptorType

Descriptor type. Will have value libusb_descriptor_type ::LIBUSB_DT_ENDPOINT LIBUSB_DT_ENDPOINT in this context. Read more...

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 . Read more...

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_endpoint_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. Read more...

wMaxPacketSize

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

bInterval

Interval for polling endpoint for data transfers. Read more...

bRefresh

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

bSynchAddress

For audio devices only: the address if the synch endpoint. Read more...

extra

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

extra_length

Length of the extra descriptors, in bytes. Must be non-negative. Read more...

References

Location	Referrer	Scope	Text
libusb.h:627			struct libusb_endpoint_descriptor {
descriptor.c:78	clear_endpoint()		static void clear_endpoint(struct libusb_endpoint_descriptor *endpoint)
descriptor.c:84	parse_endpoint()		struct libusb_endpoint_descriptor endpoint, const uint8_t buffer, int size)
descriptor.c:181	clear_interface()		clear_endpoint((struct libusb_endpoint_descriptor *)
descriptor.c:184	clear_interface()		free((void *)ifp->endpoint);
descriptor.c:295	parse_interface()		struct libusb_endpoint_descriptor *endpoint;
descriptor.c:298	parse_interface()		endpoint = calloc(ifp->bNumEndpoints, sizeof(*endpoint));
libusb.h:769	libusb_interface_descriptor::endpoint	libusb_interface_descriptor	const struct libusb_endpoint_descriptor *endpoint;
libusb.h:1609	libusb_get_ss_endpoint_companion_descriptor()::endpoint	libusb_get_ss_endpoint_companion_descriptor()	const struct libusb_endpoint_descriptor *endpoint,