Solved

Intercept serial port communication

Posted on 2001-08-06
7
412 Views
Last Modified: 2013-11-15
Hi,

Because I want to understand the protocol in which an application "talks" to external hardware, I need to have a program which intercepts the "talking" and dumps it to a file.

The program must sit and wait until another program writes or retrieves data to or from the COM1: port (it has to run on a Windows 2000 machine).

Is this possible in VISUAL C++ (or in any way at all?). If such a program already exists, please say where I can get it!

Thnx in advance,

Bart van der Vliet
trance_creator@zonnet.nl
0
Comment
Question by:trance_creator
[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
  • 3
  • 3
7 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 6356018
>>Is this possible in VISUAL C++ (or in any way at all?).

You can always do that usina API hooking - see http://research.microsoft.com/sn/detours/ and http://msdn.microsoft.com/msdnmag/issues/1000/vtrace/VTrace.asp on this issue.

BTW: A great tool that already does what you want to is http://www.sysinternals.com/ntw2k/freeware/portmon.shtml
0
 
LVL 1

Expert Comment

by:RideOn
ID: 6356084
You have to use following APIs CreateFile & ReadFile to Read from ComPort.
Do you only want to Read from it?
0
 
LVL 86

Expert Comment

by:jkr
ID: 6356140
>>You have to use following APIs CreateFile & ReadFile to
>>Read from ComPort.

But these APIs don't allow to intercept an ongoing communication...
0
Resolve Critical IT Incidents Fast

If your data, services or processes become compromised, your organization can suffer damage in just minutes and how fast you communicate during a major IT incident is everything. Learn how to immediately identify incidents & best practices to resolve them quickly and effectively.

 
LVL 1

Expert Comment

by:RideOn
ID: 6356174
oh yes, thats right
okay, want to know what i did?
i had to monitor the communication over COM1 Port.
I made a patch-cable that was 1:1:1, that means APLLICATION - COM1 - COM2

over COM1 i communicated with the APPLICATION and on COM2 i watched what's happening. I think that's a very easy and fast way to do that...
U can watch COM2 with a normal Terminal-Program like Windows Hyper Terminal...
0
 
LVL 86

Accepted Solution

by:
jkr earned 250 total points
ID: 6356191
>>okay, want to know what i did?

Well, that works - but it's easier to use http://www.sysinternals.com/ntw2k/freeware/portmon.shtml 
0
 
LVL 1

Expert Comment

by:RideOn
ID: 6356247
that's maybe right...but you're a little restricted with that application...
but anyway, maybe it's enough for trance_creator...

grEEz RideOn
0
 

Author Comment

by:trance_creator
ID: 6358384
The program is exactly what I need! Thanks a lot!!!

TTYL,

Bart van der Vliet
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Why isn't object file created? 6 93
what type of pointer is this pointer? 3 24
Cannot install SkypeSetup.exe 4 46
JQuery on multiple lines 3 16
If your app took Google’s lash recently, here are the 5 most likely reasons.
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…

726 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