Solved

open the COM1 port

Posted on 1998-01-07
1
590 Views
Last Modified: 2008-02-01
Dear sir,
 How can I open the COM1 port to read the characters  through it by using Visual C++ 5.0?
Thanks,
0
Comment
Question by:myle
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 7

Accepted Solution

by:
galkin earned 50 total points
ID: 1177739
Com port is treated as file in Win32. So use CerateFile Win32 API function to open file and ReadFile and WriteFile to read/write data from/to port.

  HANDLE hPort = ::CreateFile
  ( _T("COM1"),
            GENERIC_READ | GENERIC_WRITE,
            0,    // exclusive access                
            NULL, // no security attributes
            OPEN_EXISTING,
            FILE_ATTRIBUTE_NORMAL,
            NULL  // No template
  );
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
Introduction This article is the first in a series of articles about the C/C++ Visual Studio Express debugger.  It provides a quick start guide in using the debugger. Part 2 focuses on additional topics in breakpoints.  Lastly, Part 3 focuses on th…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
Suggested Courses

635 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question