fieldbus communication

I. Differences between the concepts of several words 1. Communication and communication At present, the use frequency of these two words is quite high, but the definition of the word scope is not clear and unified. 1.1 in the traditional sense, communication mainly refers to telephone, telegraph, and telex. A message refers to a message that is transmitted from

Order today is asked about interprocess communication problems, found that they do not know enough, so, to sum up the main task of the operating system is to manage the computer software, hardware resources. The main features of modern operating systems are multi-user and multitasking, which is the parallel execution of programs, and Windows is so Linux. Therefore, the operating system relies on the process to manage the computer's software and hardwa

Inter - process communication between embedded Linux (v)--Introduction to interprocess communicationI. Introduction to inter-process communication l inux process communication way linux of Bell Labs. system V IPC and BSD Socket two interprocess communication mechanisms Linux inter-process

Communication Mode Parallel Suitable for short distance communication, the parallel communication control is simple and the relative transmission speed is fast (8 bits are transmitted together). Serial Can only be transmitted by one person. Sync (Understanding) Establish the direct control of the receiver clock by the sender clock, so that the two sides a

Communication is purposeful, so what is the purpose of communication?1. Communication with purpose 1.1: communication with four purposes (1) describes things. (2) express emotions. (3) establish a relationship. (4) attempt. Before communication, we need to know which of the

Pipeline CommunicationWhat is a pipe? The pipeline is one-way, first-out, and he connects the output of one process with the input of another. One process (write process) writes data at the end of the pipeline, and another process (read process) reads the data from the head of the pipe.Pipeline CreationPipelines include nameless pipes and two of known pipelines, which are used for communication between parent and child processes, which can be used for

For telecommunications devices such as Cisco, Nortel and Avaya, Tuesday is their bad day. Tomorrow, Bill Gates will announce Microsoft's official foray into the communications equipment industry. The product that Microsoft brings is "unified communication". This is a platform to integrate all communication methods, such as: Voice, video, instant messaging and other information. If the project succeeds, th

what is JMS. The JMS-the Java Message Service-application interface is a Java platform-oriented messaging middleware (MOM) API for sending messages and communicating asynchronously between two applications, or distributed systems. The Java Messaging Service is a platform-independent API, with most MOM providers supporting JMS. the advantages of JMS At present, CORBA, DCOM, RMI and other RPC middleware technologies have been widely used in various fields. But in the face of distributed systems

[Serialization] C # design and implementation of communication (Serial Port and network) framework-6. Design of Communication Controller, Contents Chapter 6 Design of Communication Controller... 2 6.1 Controller Interface... 2 6.2 serial controller... 3 6.3 network controller... 5 6.4 Communication Control Manager... 9

HandlerHandler is a messaging mechanism in the Android system that works against multithreaded scenarios. The message of a process is passed to the B thread for asynchronous message processing. In many cases, an action message in a worker thread that needs to update the UI is passed to the UI main thread, which implements the update UI operation.Because the worker thread and the main thread are shared address spaces, that is, the handler instance object Mhandler is on a shared memory heap betwee

Basic principle * * *: Normally, a program can only access its own data, and the other processes do not communicate, each process is a separate entity, processes do not need to collaborate between the task can be completed. But as the complexity of the problem increases, a process cannot do all the work, and there must be more than one process that works together to solve the problem faster, better, and more quickly, just as collaboration between people can do much bigger things. However, for

Reprint Please specify source: http://blog.csdn.net/xiaoy_h/article/details/26090277Needless to say, IPC is inter-process communication.interprocess communication can be used in a number of ways, such as the creation of a port after the use of multicast technology for handshake connection, here is to be described by the method of memory file mapping implementation.First add the relevant API functions to the project: [DllImport ("kernel32.dll",

Please respect the fruits of labor, reproduced please specify the source: http://blog.csdn.net/caoshichao520326/article/details/8995583 Java Multithreading to exchange information, sometimes only pipe to complete, in the use of pipe communication, often encounter "Java-ioexception:read end Dead" or "Java-ioexception:write-end dead" anomaly, The following for this problem to make a simple analysis, the first is to write a pipeline

Introduction In the previous article discussed several application system integration methods, found that the actual Message Queuing-oriented integration scheme is a more reasonable overall choice. Here, we first discuss a specific message queue ACTIVEMQ Basic communication method. ACTIVEMQ is an implementation of the JMS message Communication specification. In general, the most common types of message

The internet is used to convey information, to understand the network programming, first to learn some basic knowledge of communication From the initial letter to telegram, telephone, to video communication, from radio, radio, to digital television, is the credit of the communication system, text, voice, images and so on are information, so it is the information

Tags: based on send local attr char dev buffer code onlineDon't say much nonsense, first. To get to the point: recently Idle bored, remembered in second day when using VB to write a LAN multiplayer chat room. At that time using the Winsock, and then write out for the students to use information classes, in fact, there is no use AH . It was a whim this afternoon to implement this function in C + +. To Baidu a bit of relevant information, just found that C + + socket is really trouble ... ( Maybe

Tags: signal processing timer seconds print process table permissions arm err getSignalSignals are asynchronous interprocess communication modesHow the process responds to the signal:SIGKILL and SIGSTOP cannot be ignoredWhen the process receives a signal, the signal processing function executed at this timeThe SIGSTOP signal is used to pause a process and cannot be blocked, ignored, and processed, and the default action is to pause the processMost sig

Preface:Blog articles want to organize the logical, easy to follow their own review study and communicate with you. I don't know if you feel the same way? Sometimes busy all day, search for all kinds of information, sometimes ecstatic, sometimes depressed depressed, sometimes into the source of the horn tip, sometimes the tiger to eat the day. But every time you go through this process, when you're about to give up, it suddenly dawned on you, the problem orbug solved. So again and again and agai

Principle of synchronous communication Synchronous communication is a continuous serial transmission of data communication, one communication only one frame of information. The information frame here is different from the character frame in the asynchronous communication, an

Android Process Communication and android Process Communication I recently studied the communication between Android processes. It turns out to be used, but it is useless. Let's take a look. At the beginning, my head was so big. After watching it all night, my head became like this. It scared the baby to go to bed quickly ,, Drink tea and tell a story before talk