Chapter 2. API Reference
union usb_intf_desc_t
#include <usb_types_ch9.h> Structure representing a USB interface descriptor.
See Table 9-12 of USB2.0 specification for more details
Public Members
uint8_t bLength
Size of the descriptor in bytes
uint8_t bDescriptorType
INTERFACE Descriptor Type
uint8_t bInterfaceNumber
Number of this interface.
uint8_t bAlternateSetting
Value used to select this alternate setting for the interface identified in the prior field
uint8_t bNumEndpoints
Number of endpoints used by this interface (excluding endpoint zero).
uint8_t bInterfaceClass
Class code (assigned by the USB-IF)
uint8_t bInterfaceSubClass
Subclass code (assigned by the USB-IF)
uint8_t bInterfaceProtocol
Protocol code (assigned by the USB)
uint8_t iInterface
Index of string descriptor describing this interface
struct usb_intf_desc_t::[anonymous] USB_DESC_ATTR
uint8_t val[USB_INTF_DESC_SIZE]
union usb_ep_desc_t
#include <usb_types_ch9.h> Structure representing a USB endpoint descriptor.
See Table 9-13 of USB2.0 specification for more details
Public Members
uint8_t bLength
Size of the descriptor in bytes
uint8_t bDescriptorType
ENDPOINT Descriptor Type
uint8_t bEndpointAddress
The address of the endpoint on the USB device described by this descriptor
uint8_t bmAttributes
This field describes the endpoint’s attributes when it is configured using the bConfigurationValue.
uint16_t wMaxPacketSize
Maximum packet size this endpoint is capable of sending or receiving when this configuration is selected.
uint8_t bInterval
Interval for polling Isochronous and Interrupt endpoints. Expressed in frames or microframes depending
on the device operating speed (1 ms for Low-Speed and Full-Speed or 125 us for USB High-Speed and
above).
struct usb_ep_desc_t::[anonymous] USB_DESC_ATTR
Espressif Systems 502
Submit Document Feedback
Release v4.4
To Next Page
Loading...