fieldbus communication

Linux IPC (Inter-Process Communication, Inter-process Communication) pipeline learning, ipcinter-Process1. the standard Stream pipeline operation supports the file stream mode, which is used to create the pipeline linking another process. This blog introduces the function popen and pclosepopen in detail. 2. unknown pipeline (PIPE) features: 1) communication can o

Process communication refers to the exchange of information between processes. PV operation is a low-level mode of communication, high-level communication means the transmission of large amounts of data with high efficiency of the communication mode. There are three main classes of advanced

(i) communication between threads: Because multithreading shares address space and data space, communication between multiple threads is a thread of data that can be directly provided to other threads for use, Without having to go through the operating system. So the communication between the threads and synchronization of the main way is lock, signal, signal vo

Reflection: Language Communication and document communication in project development Problem: A mentor arranged to develop and implement some functional modules or small applications during the trial period of the company. After all, you need to add code under the framework of the entire product. After reading the source code of nearly 1 GB of the entire product, it is quite vast. Although we do not need ne

Recently, I have fully felt that,ProgramThe communication and communication skills of members are too important, or even more important than technical skills. Many programmers are used to being bored with problems. 1:There are some difficult things that cannot be discussed with the leaders.-- If you don't ask a colleague, ask a technical leader, or study it by yourself, it may be difficult for several

Next: "Architecture design: Inter-system Communication (4)--io communication model and Java Practice Medium", we continue to explain asynchronous IO7. Asynchronous IOIn the previous two articles, we explained the three IO models for blocking synchronous IO, non-blocking synchronous io, multiplexed io, and Java support for these three IO models. The main point is that the IO model is supported by the operati

Inter-process communication:# pipe: A pipe is a half-duplex mode of communication in which data can only flow in one direction and can only be used between processes that have affinity. A process's affinity usually refers to a parent-child process relationship.# famous pipe (named pipe): A well-known pipe is also a half-duplex mode of communication, but it allows

Escape characters in communication protocols and escape characters in communication protocolsEscape characters in communication protocolsPurpose: make the communication content more secure and reliable in the communication protocol.For example: if you need to customize a

PHP Socket communication-UDP communication instance. PHP Socket communication-UDP communication instance this article describes the PHP Socket communication-UDP communication method. Share it with you for your reference. Details:

Java concurrency: Code explanation of traditional thread-synchronous communication technology, java Communication Technology This article focuses on the code example of the traditional thread synchronous communication technology of Java concurrency, which is described as follows. Let's first look at a question: There are two threads. The sub-thread executes 10

Today's society is already an information society, can quickly and efficiently access information, become the core of competitiveness, already more than 10 years ago, the popularization of the Internet has accelerated the flow of information, the way we get information has gradually shifted to a more efficient internet, and now, the advent of micro-Bo era, but also to bring you what kind of information? Remember an internet giant said, users of the four major needs of the Internet is: informati

In Linux systems, there are times when multiple processes work together to accomplish a task, between processes or between threads that sometimes need to pass information, and sometimes to coordinate with each other, interprocess communication occurs (interprocess communication or IPC) Signals are also a mechanism for interprocess communication, although its main

Redis Research (13)-security and communication protocols, redis research communication protocols I. Security Salvatore Sanfilippo, author of Redis, once published the Redis declaration, which mentions Redis to be concise and beautiful. Redis does not do much work at the security level.1. trusted environmentThe Redis security design is based on the premise that "Redis runs in a trusted environment". During t

: This article mainly introduces the PHP_APP communication interface-encapsulation of communication interfaces. For more information about PHP tutorials, see. Standard format of communication data: Code Status code (200,400, etc ); Message prompts (logon failure, data return success, etc ); Data returns data; 1. json encapsulation of

Inter-process communication (4)-shared memory, Process Communication shared memory I will use several blogs to summarize several methods of communication between processes in Linux. I will write the summary at the beginning in each blog of this series. Communication between processes MPs queue Message Queue Signal

Android binder inter-process communication mechanism 6-JAVA interface of inter-process communication mechanism of Binder, android6-binder JAVA layer interface for inter-process communication between Binder, mainly through the JNI method to call the C/C ++ interface of the Binder Library On the JAVA layer, a Service component is called a JAVA Service, and a Servic

The IP phone number is a star product in Cisco Unified Communications. Everyone knows that, as an IP-based voice mode, it is very cost-effective. Naturally, this market is also very optimistic. Now let's take a look at Cisco's Unified Communication telephone and communication devices. Cisco Unified Communication telephone and