vsat communication

3.4 use wm_copydata for Message Communication For a small amount of data, wm_copydata can be used for convenient communication. Because sendmessage () is blocked, only sendmessage () can be returned if the receiver responds to the message. Otherwise, it will be blocked all the time. Therefore, for a large amount of data, the use of sendmessage () can easily lead to false window death.3.4.1 how to implement

　　background: The recent project uses a piece of industrial board, the board hardware and the host computer through the UDP communication, but the manufacturers only provide C # demo, and the corresponding driver commands encapsulated as DLL dynamic library. Another project team wants to be able to drive this industrial board under the Android platform, I have previously written some of the underlying drivers, but all received through the serial port

There are three modes of communication in the current network: unicast, broadcast, multicast (multicast), which has the advantage of multicast and broadcast at the latest, and has the most development foreground.One, unicast:The "one-on" communication mode between hosts, switches and routers in the network are forwarded to the data only and not replicated. If 10 clients require the same data, the server nee

This article takes the Visual C + + data acquisition and the serial communication measurement and control application actual combat as the reference tutorialThis article is suitable for VC + + Serial Communication IntroductionOne, page layout and add controls1, install the vs2010.2, create a new MFC project based on VC + + CommNote: Click OK, then next, to change the application type to dialog base, then ne

Socket Communication in Python twisted framework Reprinted: http://blog.csdn.net/jackyyen/archive/2009/04/13/4069887.aspx Python Network toolkit twisted Matrix Twisted matrix is an increasingly popular pure Python framework for programming network services and applications. Although twisted matrix has a large number of loosely coupled modular components, the central concept of the framework is the idea of non-blocking asynchronous servers. In thi

(Resetsignal ()), MyThread, SLOT (Resetslot ())); Setwindowtitle ("Thread Test"); Resize (200, 200); Mythread->start (); } Widget::~widget () { } void Widget::startslot () { Mythread->start (); } void Widget::stopslot () { Mythread->terminate (); } void Widget::updateslot (int num) { Label->settext (Qstring::number (num)); } void Widget::clearslot () { Emit resetsignal (); } #include "Main.moc" int main (int a

In fact, this implementation is not a true sense of video communication, neither Peer-to-peer nor very high performance, because basically two clients at the same time to the server to deliver video information, and then by the server to relay to each other. The point is two. IIS root decentralization clientaccesspolicy.xml files Note the amount of data defined in the service is 2147483646, or it may not pass This is a one-way client. Periodically

Microsoft Communication Framework practice-main concepts and communication framework practice Windows Communication Foundation (WCF) is a series of application frameworks developed by Microsoft to support data Communication. It is a cross-platform security, reliable, and transactional solution. It is a web service ,. n

Communication between a thread DWORD WINAPI firstthread (void *p) {messageboxa (0, "1", "1", 0); printf ("1th thread execution complete \ n"); SetEvent (event[0]);//Send event signal return 0; } DWORD WINAPI secondthread (void *p) {WaitForSingleObject (event[0], INFINITE);//wait for the event signal to appear, perform the next messageboxa (0, "2", " 2 ", 0); printf ("2nd thread execution complete \ n"); return 0; } void Main () {//security_attributes,

Winform serial communication platform, winform Serial Communication Next to the last card reading, you need to make a weighbridge read. The following figure shows how to read the lbs. The weighbridge always sends data to the serial port, so it is necessary to intercept the data to determine whether the data is legal and then calculate the result. I encountered a small problem. I will introduce it at the end

Linux inter-process communication: Message Queue and linux Process Communication queue I. Features of Message Queue 1. A message queue is a linked list of messages in a specific format. It is stored in the memory and identified by the Message Queue identifier.2. A Message Queue allows one or more processes to write and read messages to it.3. Both pipelines and named pipelines are

Message Queue for Linux Process Communication and linux Process Communication queue Based on the following ideas, this article first elaborates on the message queue mechanism from a macro perspective, then describes the mechanism using the specific code as an example, and finally tries to think about the potential application of the communication mechanism. Mess

Java implements multi-threaded socket communication technology, and ocket Communication Technology In the previous example, we use the following code: Package com.test.net; import java. io. dataInputStream; import java. io. inputStream; import java.net. serverSocket; import java.net. socket; public class EchoServer {/*** print all client output */@ SuppressWarnings ("deprecation") public static void main (

Synchronous communication between threads and synchronous communication between threads We all know that the thread code in java can be written as follows: new Thread(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stub}}).start();Under multi-thread startup, the running between threads will be switched randomly. Generally, we may need to switch between threads in an orderly manner

Simple analysis Ucenter member Synchronous login Communication principle, ucenter communication principle 1, the user login discuz, through the logging.php file function Uc_user_login to post data verification, that is, username and password to verify. 2. If the validation succeeds, the function uc_user_synlogin in the client.php file under Uc_client will be called, in which uc_api_post (' user ', ' synlog

Message communication messagesMessages are an important way of interprocess communication, usually made up of both the client and server side. The server creates a message queue with a specific key value, populates the message queue with the message and data type to be sent according to the agreed message format. On the client side, the corresponding data is received according to the known key value and the

Pipe Introduction Pipelines are a way of interprocess communication in Linux, which connects the output of a program directly to the input of another program (in fact, I prefer to liken the pipe to the pipe of a rural land). The main pipeline of Linux includes two kinds: nameless pipe and famous pipe. This section mainly talks about the nameless pipeline, first introduces these two pipes. (the feature is very important!) ） 1, Nameless pipe The name

/* * Date:2004-11-29 author:zhangyu6050; * TODO: a two-person single direction communication example * This file is the host side (Server) * Provide communication between host and client sockets: Fromclient * Bugs: */ Import java.net.*; Import java.io.*; public class Chatserver { public static void Main (string[] args) { Final int port = 1775; The port number of the host that established the

Well, since I said that in fact, no one is more cattle than who , we think that communication is a very cabbage thing, these two days plus my QQ and email friends obviously enthusiastic, the public morale has lost control. And when I and two of the industry after Daniel Chatter, and finally found that they will face the situation is very cold-in the face of the influx of advice and admiration, Daniel also feel very tired, at a loss. So I see from the

Basic signal of PHP process communication, php process Communication Use signal communication. You can use kill-l to view the signal type of the current system.The detailed meaning of each signal, please refer to my article: http://www.bkjia.com/article/106040.htmWhen using the signal, you can use php -- version to view the current PHP version. You have decided w