It is often said that a device usually has multiple configurations, and the configuration usually has multiple interfaces, and the interface usually has multiple endpoints. The interface represents a logical device, such as a sound card divided into recording and playback. When you access a device, you are accessing an interface (a logical device). In addition to endpoint 0, each endpoint supports only one
Introduction to USB protocolUSB is a protocol bus, that is, the communication between the host and the device needs to follow a series of conventions. The agreement content is many, here only makes some simple introduction, in-depth study, may refer to the USB specification (WWW. usb ORG).To understand the name in the agreement, look at Figure 10. 32. The diagram highlights the communication flow (communication flow) between the client software on the host and the USB logic device (the device in
Recently built a swift cloud storage architecture for the needs of the jobLet's take a look at the technical knowledge Inside: The SWIFT Service is a component service belonging to OpenStack, the Component Services in OpenStack are Keystone, Nova, glance, etc., different services are responsible for different functions, we build today swift+ Keystone,swift is responsible for storing data objects, Keystone provides authentication and authorization for it, but the Keystone Service is a shared cate
This article illustrates the bidirectional queue classes implemented by PHP and its usage, and has good reference value for the learning of PHP data structure and algorithm. Share to everyone for your reference. The specific analysis is as follows:
(Deque, the full name double-ended queue) is a data structure that has the nature of queues and stacks. Elements in a two-way queue can be ejected from both ends, and their qualifying insert and delete operations are performed at both ends of the tab
" in WCF.C (contract): English is understood as "contract", what is the contract?Tell us what we can do and what we can't do. The primary role of contract is to expose all the valid methods provided by a WCF service. Contract actually transforms each method into a corresponding message.C Solved: What functionalities does the Service provide?Third, Endpoint (end point) WCF implements the communication of the various applications of the network system.
) , the configuration has multiple interfaces composed. in the USB protocol, the interface consists of multiple endpoints, representing a basic function . Look at one of the following examples:
it seems that the others are better understood, mainly Endpoint the notion that the endpoint is the only addressable part of the USB device , which is located on a USB device or host. Data Buffers ,
Chapter13.http endpoint
I understanding HTTP Endpoint Security1 sever layers of HTTP endppint Security(1) Endpoint Type -- TCP/HTTP (s)(2) Endpoint payload -- the participating subset of traffic that the endpoint allows. tsql, soap, service_broker, and database_processing
From http://blog.csdn.net/linuxshadow/archive/2008/08/27/2838510.aspx
USB protocol Overview
USB is a protocol bus, that is, the communication between the host and the device must follow a series of conventions. There are many protocols. Here is a brief introduction. For more information, see USB specifications (www.usb.org ).To understand the name in the protocol, see Figure 10.32. This figure highlights the communication flow between the client software on the host and the USB logica
Core of the host, but its function is limited to providing programming interfaces, for example, use the structures usb_gadget_ops and usb_ep_ops to re-encapsulate the device controller driver operation function and Endpoint operation function. Specifically, the register function usb_gadget_register_driver of the Gadget driver is provided directly by the device controller (UDC) driver to bind the UDC to the gadget driver. This increases the dependency
Important USB keywords:
1. endpoint: a data buffer zone located on a USB device or host. It is used to store and send various USB data. Each endpoint has a unique fixed address, has different transmission features (such as input, output, configuration, and batch transmission)
2. frame: the concept of time. In USB, a frame is 1 ms. It is an independent unit and contains a series of bus actions. USB divides o
: device descriptor, configuration descriptor, string descriptor, interface descriptor, and Endpoint descriptor.(2) a USB device can be regarded as a device that provides multiple serial ports. According to the USB specification, each serial port is called an endpoint to communicate with this endpoint, we need to open the connection to this
content. It is called "ABC of the service".
WCF uses an endpoint to represent such a group of relationships. Endpoints are a mixture of addresses, bindings, and contracts.
Each endpoint contains these three elements, and the host is responsible for making the endpoint public.
Each service discloses at least one business endp
USB protocol OverviewUSB is a protocol bus, that is, the communication between the host and the device must follow a series of conventions. There are many protocols. Here is a brief introduction. For more information, see USB specifications (www.usb.org ).To understand the name in the protocol, see Figure 10.32. This figure highlights the communication flow between the client software on the host and the USB logic device (the device involved in programming). The communication flow spans the USB
Important USB keywords:
1. endpoint: a data buffer zone located on a USB device or host. It is used to store and send various USB data. Each endpoint has a unique fixed address, has different transmission features (such as input, output, configuration, and batch transmission)
2. frame: the concept of time. In USB, a frame is 1 ms. It is an independent unit and contains a series of bus actions. USB divid
Basic class, copy down the direct call on the line:Using System;Using System.IO;Using System.Net;Using System.Text;public enum Httpverb{Get,//method commonly used on this kind of, of course you can also add other get: Get post: Modify put: Write Delete: deletePOST,PUT,DELETE}Namespace Httputils{public class Restclient{public string EndPoint {get; set;}//Requested URL address eg:http://215.23.12.45:8080/order/order_id=1isdel=0Public Httpverb method {ge
Socket SocketsBoost.asio has three types of socket classes: IP::TCP,IP::UDP and ip::icmp, all of which are extensible. You can create your own socket class, although it is slightly more complex to do. If you really want to do this, you can refer to BOOST/ASIO/IP/TCP.HPP,BOOST/ASIO/IP/UDP.HPP and boost/asio/ip/icmp.hpp. They are very small classes that use typedef keywords internally.You can use the IP::TCP,IP::UDP and IP::ICMP classes as a placeholder; You can access the methods of classes and c
I. Linux USB driver levels
1. devices, configurations, interfaces, and endpointsThe logical organization of a USB device consists of four layers: device, configuration, interface, and endpoint.
A device usually has one or more configurations:
Each USB device provides different levels of configuration information, which can contain one or more configurations, different Configurations enable devices to exhibit different combinations of functions (
functionsThis kind of composite device includes the functions that has only one interface, such as HID+MSD.The default endpoint (endpoint 0) is a shared by all functions.Each function has a interface only, to handle class-specific requests, control commands and data.The interface and endpoint settings are function specific.Figure 3-1. USB Composite Device with S
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.