serial port programming in c linux pdf

... -// circle.cpp // Defines and calls the function circle() // -#include <iostream> #include <iomanip> #include <string> using namespace std; // Prototype of circle(): void circle( ... value occurs, i.e., the function manipulates a local copy Thus, only a local copy of the string is changed in the function, but the string in the calling function remains unchanged Exercise 2 ... used to indicate an error For pointers, the symbolic constant NULL is defined as 0 in standard header files A pointer containing the value NULL is also called NULL pointer Trang 5䊐 Using Pointers

Ngày tải lên: 06/07/2014, 17:21

... public: // Public data members and methods here }; // account.h // Defining the class Account // -#ifndef _ACCOUNT_ // Avoid multiple inclusions #define _ACCOUNT_ #include <iostream> #include ... #include <string> using namespace std; class Account { string name; // Account holder unsigned long nr; // Account number double balance; // Account balance bool init( const string&, unsigned ... so-called public interface of the class. The opposite page shows a schematic definition of a class The privatesection gen-erally contains data members and the publicsection contains the access

Ngày tải lên: 06/07/2014, 17:21

... for initial- izing objects—more details are given later. 252 ■ CHAPTER 13 DEFINING CLASSES // account_t.cpp // Uses objects of class Account. // #include "Account.h" int main() { Account ... defining the methods for the class Account in a source file named Account.cpp, for example. The source code of the application program, for example, the code containing the function main, is independent ... of current2 to the corresponding members of current1. 254 ■ CHAPTER 13 DEFINING CLASSES // ptrObj.cpp // Uses pointers to objects of class Account. // #include "Account.h" // Includes

Ngày tải lên: 06/07/2014, 17:21

... the methods in this “friendly” class automatically become friendfunctions in the class containing the frienddeclaration This technique is useful if a class is used in such close conjunction with ... declaration, which eliminates data encapsulation in certain cases. Imagine you need to write a global function that accesses the elements of a numerical array class If you need to call the access ... FRIEND CLASSES Class Result Class ControlPoint Trang 7䊐 Declaring Friend ClassesIn addition to declaring individual friendfunctions, you can also make entire classes “friends” of another class

Ngày tải lên: 06/07/2014, 17:21

... The C class inherits the Bclass, which is defined in the public section following the colon The privateandpublicsections contain additional members of the Cclass 䊐 Access to Public Members in ... available in the derived class and will retain its original meaning We will be looking at this point in more detail later 䊐 Public Interface Since the Carclass is a publicbase class of the PassCarclass, ... Direct and Indirect Base Classes The derived class Ccan itself be a base class for a further class, D This allows for class hierarchies Class Bthen becomes an indirect base class for class D In

Ngày tải lên: 06/07/2014, 17:21

... sends and receives on the new sockets The server gets a socket for an incoming client connection by calling accept () int accept(int socket, struct sockaddr *clientAddress, unsigned int *addressLength) ... new socket using send() and r ecv ( ) 9 Close the client connection using c l o s e ( ) Creating the socket, sending, receiving, and closing are the same as in the client The differences in the ... HandleTCPClient(int clntSocket); /* Maximum outstanding connection requests */ int main(int argc, char *argv[]) { /* Error handling function */ /* TCP client handling function */ int servSock;

Ngày tải lên: 05/11/2012, 14:45

... sin6_family; in_port_t sin6_port; uint32_t sin6_flowinfo; struct in6_addr sin6_addr; }; Trang 19Working with Addressesstruct sockaddr_in6 the socket routines struct sockaddr_in addr; Trang 20Creating ... = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); Trang 24Accepting Connections#include <sys/types.h> #include <sys/socket.h> int connfd; struct sockaddr_in cliaddr; ... for new connections The backlog is the maximum number of connections the socket will queue up, each waiting to be accept()’ed Trang 14Connecting to a Server#include <sys/types.h> #include

Ngày tải lên: 05/09/2013, 09:57

... 1Socket Programming in C/C++cSeptember 24, 2004 Trang 3Sockets are a protocol independent method of creating a connection between processes Sockets can be either I connection based or connectionless: ... connection is completed, thesocket is closed, and next connection can beaccepted Forking server: After an accept, a child process is forked off to handle the connection Variation: the child processesare ... build a concurrent server: I a fork is performed after the accept I The child process closes listenFd, and communicates usingconnectFd I The parent process closses connectFd, and then loops back tothe

Ngày tải lên: 15/03/2014, 17:20

... contain much code: using using using using using using using using using using using using System; System.Collections.Generic; System.Linq; System.Net; System .Windows; System .Windows. Controls; ... touch screen works in a different way. An array of conductors underneath the screen surface detects the change in capacitance caused by the presence of a finger on the surface. The touch screen ... comparable between processors. The processor in the Windows PC might take five clock ticks to do something that the Windows Phone processor needs ten ticks to perform. The Windows PC processor might

Ngày tải lên: 17/03/2014, 13:20

... long\n",numbytes); #define MYPORT 4950 // the port users will be connecting to int main(int argc, char *argv[]) { int sockfd; struct sockaddr_in their_addr; // connector’s address information struct hostent ... error checking for these calls: bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)); listen(sockfd, BACKLOG); Trang 19sin_size = sizeof(struct sockaddr_in);new_fd = accept(sockfd, ... The client source12: #define PORT 3490 // the port client will be connecting to #define MAXDATASIZE 100 // max number of bytes we can get at once int main(int argc, char *argv[]) { int sockfd,

Ngày tải lên: 19/03/2014, 13:41

... Server 156 7.3 Creating a Transmission Control Protocol (TCP) Connection 157 Reading a Web Page 157 7.4 Connecting to a Data Source 163 Using the WebClient class 163 7.5 Using LINQ to Read from ... Application Switching 210 The Windows Phone Application LifeCycle 211 Fast Application Switching in an application 213 Fast Application Switching and Development 218 Fast Application Switching and ... All Windows Phone devices have a core specification This includes a particular size of display, capacitive touch input that can track at least four points, Global Positioning System support,

Ngày tải lên: 23/03/2014, 22:21

... ❘ CHAPTER 1 A LOOK AT FUNCTIONAL PROGRAMMING HISTORY else tch ++ (calcLine ch (col+1) line maxp) ++ tch calcLines :: Int -> Int -> String calcLines line maxp = let ch = (ord ‘A’) + line in ... www.it-ebooks.info PROFESSIONAL Functional Programming in C# CLASSIC PROGRAMMING TECHNIQUES FOR MODERN PROJECTS Oliver Sturm www.it-ebooks.info Professional Functional Programming in C#: Classic Programming ... practical concerns of using functional programming in C# I picked a few speci c scenarios, and there are descriptions of functional programming ideas in existing products and technologies

Ngày tải lên: 28/04/2014, 16:01

... that contains the functions necessary to success- fully communicate with the serial port. With a single header file that contains all the functions necessary to communicate over a serial port, ... needed. 3.2.1 Windows In Windows, setting up the serial port requires three steps. 1. Create a DCB object and initialize it using the function BuildCommDCB(). 2. Set the serial port settings using the initialized DCB ... otherwise settings could be lost. 8 Provided that the serial port is successfully opened the next step is to configure it to the speci c appli- cation. 3.1.2 Linux Opening the serial port in Linux is...

Ngày tải lên: 05/11/2013, 20:15

... left curved bracket indicates the start of a function block, which contains the state- ments defining what the function does. ᮀ Prototype and Definition In a function definition the function ... settings for program com- pilation. DEFINING FUNCTIONS ■ 175 The following section describes how to program global functions. Chapter 13, Defining Classes, describes the steps for defining member ... of inheritance to create specialized classes without needing to change any existing classes. When implementing a class you must define the capacities of those objects, that is, the member functions,...

Ngày tải lên: 06/07/2014, 17:21

... when the object is accessed. c) A static constructor can have public as a accessibility modifiers 74. class A { public static int X = B.Y + 1; } class B { public static int Y = A.X ... explicitly or implicitly. b) Static constructors can have accessibility modifiers. e) Static constructors are called when the class is loaded. c) Static constructors cannot be called ... error. c) Incompatible type for ’=’ can’t convert SubClass to SuperClass. b) No constructor matching SuperClass() found in class SuperClass d) Wrong number of arguments in constructor....

Ngày tải lên: 21/08/2012, 15:55