inpout.dll and Visual C++ - Electronic Circuits Projects Diagrams Free

gastonanthony · 14th September 2005, 04:45 PM

hi, just got a problem that's buggin' me for a while now. I'm trying to access the parallel port and downloaded the inpout32.dll and tried to access the ports after I placed the inpout32.dll in C:\windows\system, but there is still a problem and an error occurs, the exact link of the code i'm trying to do is this

http://www.logix4u.net/parallelport1.htm

**Nigel Goodwin** · 14th September 2005, 06:21 PM

Quote:

Originally Posted by gastonanthony

hi, just got a problem that's buggin' me for a while now. I'm trying to access the parallel port and downloaded the inpout32.dll and tried to access the ports after I placed the inpout32.dll in C:\windows\system, but there is still a problem and an error occurs, the exact link of the code i'm trying to do is this

Can't help you on that DLL, but if you download the driver DLL that I use with WinPicProg it comes with examples in C.

BTW, did you install the program?, the one I use requires installing.

Joel Rainville · 14th September 2005, 06:26 PM

Quote:

Originally Posted by gastonanthony

I'm trying to access the parallel port and downloaded the inpout32.dll and tried to access the ports after I placed the inpout32.dll in C:\windows\system, but there is still a problem and an error occurs

What's the error you get?

ym2k · 15th September 2005, 01:56 AM

Quote:

Originally Posted by gastonanthony

hi, just got a problem that's buggin' me for a while now. I'm trying to access the parallel port and downloaded the inpout32.dll and tried to access the ports after I placed the inpout32.dll in C:\windows\system, but there is still a problem and an error occurs, the exact link of the code i'm trying to do is this

http://www.logix4u.net/parallelport1.htm

Try putting it in either c:\windows or c:\windows\system32 instead. we normally dun put driver in C:\windows\system. If problem still persist, try putting that driver in the same directory where you run your program.

gastonanthony · 15th September 2005, 02:23 AM

the instructions only told me to put the inpout32.dll in the C:\windows\system folder, it doesn't need to be installed (i think), it is located here [url]http://www.logix4u.net
I already put the inpout32.dll in C:\ (the same directory as the exe file, and C:\windows\system, and C:\windows\system32, but doesn't work,
A window appeared an asked me to send an error report to microsoft, I attached the details of the error

gastonanthony · 15th September 2005, 02:29 AM

I'm trying to do camera that follows a moving object (it must be pc based), so i'll need to experiment on the parallel port, after the program sees where the object is going, the motor beneath the camera must rotate in order for the camera to catch up.
Nigel, can the driver you mentioned be used in this project?

ym2k · 15th September 2005, 03:50 AM

Quote:

Originally Posted by gastonanthony

the instructions only told me to put the inpout32.dll in the C:\windows\system folder, it doesn't need to be installed (i think), it is located here [url]http://www.logix4u.net
I already put the inpout32.dll in C:\ (the same directory as the exe file, and C:\windows\system, and C:\windows\system32, but doesn't work,
A window appeared an asked me to send an error report to microsoft, I attached the details of the error

Did you try C:\windows\ ? Or could it be your programming error? I had use that driver before with VB6 running under XP sp2 envioriment. The results are great i must say. To narrow down the problem, i suggest you run the existing example provide in the archieve with your system. If it runs without error, most prob your error come from programming.

gastonanthony · 15th September 2005, 05:48 AM

i've already tried it with visual basic and it went fine, got it running in VB6 a few months ago. but my project needs to be done in visual C++ right now because the image processing will be done in C++, and I would like to have a uniform language in my project so as not to have problems with the delay in processing instructions, etc...I chose C++ for the speed of image processing. The problem is, I have no experience in using inpout32.dll for visual C++.

ym2k · 15th September 2005, 07:01 AM

Quote:

Originally Posted by gastonanthony

i've already tried it with visual basic and it went fine, got it running in VB6 a few months ago. but my project needs to be done in visual C++ right now because the image processing will be done in C++, and I would like to have a uniform language in my project so as not to have problems with the delay in processing instructions, etc...I chose C++ for the speed of image processing. The problem is, I have no experience in using inpout32.dll for visual C++.

Well, i just went and download the package again. It include a VC6++ source code inside. I compile it and run. It went fine without any crash. Here is the source

Code:

// InpoutTest.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
/* ----Prototypes of Inp and Outp--- */

short _stdcall Inp32(short PortAddress);
void _stdcall Out32(short PortAddress, short data);

/*--------------------------------*/

int main(int argc, char* argv[])
{

	int data;

	if(argc<3)
	{
		//too few command line arguments, show usage
		printf("Error : too few arguments\n\n***** Usage *****\n\nInpoutTest read <ADDRESS> \nor \nInpoutTest write <ADDRESS> <DATA>\n\n\n\n\n");
	} 
	else if(!strcmp(argv[1],"read"))
	{

		data = Inp32(atoi(argv[2]));

		printf("Data read from address %s is %d \n\n\n\n",argv[2],data);
	
	}
	else if(!strcmp(argv[1],"write"))
	{
		if(argc<4)
		{
			printf("Error in arguments supplied");
			printf("\n***** Usage *****\n\nInpoutTest read <ADDRESS> \nor \nInpoutTest write <ADDRESS> <DATA>\n\n\n\n\n");
		}
		else
		{
		Out32(atoi(argv[2]),atoi(argv[3]));
		printf("data written to %s\n\n\n",argv[2]);
		}
	}



	return 0;
}

Remember to include stdafx.h & stdafx.cpp in your project. I believe wat u need is only 2 function, "Inp32()" & "Out32()". Run the example again. If you can run VB6 example fine, i see no reason why you cannot do the same for VC6++

danielsmusic · 15th September 2005, 07:29 PM

you need to inport the dll to the project! and the lib file.

jrz126 · 15th September 2005, 08:31 PM

what operating system are you using? I'm using windows XP and I had a problem talking to my parallel port because there was something in the O.S. that blocked me from accessing it.

I dunno if this is your problem or not, but I thought I'd throw it out there.

....edit: Nevermind, just scrolled through your link there and saw that the problem was fixed inside that DLL file.

gastonanthony · 16th September 2005, 02:46 PM

I still don't understand, may someone please tell me what a dll does and what inpout32.dll does?I really have no clue yet

Styx · 16th September 2005, 02:59 PM

a DLL is the windows equivelent of a .so file for Linux

basically a shared libary of functions
say you write a program and in that program you want to have a dialog box for choosing a file you can do two things

1) write one from scratch yourself
2) use the one provided by your operating system/Desktop manager

number 2 is perfered since it simplifies your code by re-using someone elses code/function

So you want to write a program that accesses the parallel port (linux this would be very easy btw).
So you can do two things

1) write a low-level access to the BIOS to access and enumerate the parallel port
2) take advantage of someone elses hardwork and use their functions

now this inpout32.dll will do this, it provides the nessacary fucntions to use the parallel port easily.
To use it you need a header file (probably call inpout32.h) and do a #include at the start of your code

This will give your code access to the functions contained within the DLL.

Shared libaries aid in keeping things simple, why bother re-inventing/re-coding something that someone else has done

I am a python programmer and the equiv is the import declaration to load in the ability to use functions that other ppl have written

**Nigel Goodwin** · 16th September 2005, 03:26 PM

Quote:

Originally Posted by Styx

1) write a low-level access to the BIOS to access and enumerate the parallel port

This isn't quite true, you can't use low level access to ports under Win32 (NT and above), the OS prevents you doing it. What the port drivers do is allow you to access the ports in a 'legal' way by using a Windows driver.

If you want to see more about it, have a look at http://www.logix4u.net/inpout_theory.htm for details, including a link to the source code.

Styx · 16th September 2005, 04:06 PM

Quote:

Originally Posted by Nigel Goodwin

Quote:

Originally Posted by Styx

1) write a low-level access to the BIOS to access and enumerate the parallel port

This isn't quite true, you can't use low level access to ports under Win32 (NT and above), the OS prevents you doing it. What the port drivers do is allow you to access the ports in a 'legal' way by using a Windows driver.

If you want to see more about it, have a look at http://www.logix4u.net/inpout_theory.htm for details, including a link to the source code.

Fair enough I am a linux-head and it is easy really, we access the kernel-driver to enable full kernel control of a port, or just access the /dev/ps0 for direct access.

Been a while since coding for windows and low-level (windows 3.1)

So sounds like you need to have kernel-access to code one yourself (very hard from what I have heard with the NT kernel) so use the code someone else has done

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14th September 2005, 04:45 PM	(permalink)
gastonanthony	inpout.dll and Visual C++ hi, just got a problem that's buggin' me for a while now. I'm trying to access the parallel port and downloaded the inpout32.dll and tried to access the ports after I placed the inpout32.dll in C:\windows\system, but there is still a problem and an error occurs, the exact link of the code i'm trying to do is this http://www.logix4u.net/parallelport1.htm

15th September 2005, 02:29 AM	(permalink)
gastonanthony	I'm trying to do camera that follows a moving object (it must be pc based), so i'll need to experiment on the parallel port, after the program sees where the object is going, the motor beneath the camera must rotate in order for the camera to catch up. Nigel, can the driver you mentioned be used in this project?

15th September 2005, 05:48 AM	(permalink)
gastonanthony	i've already tried it with visual basic and it went fine, got it running in VB6 a few months ago. but my project needs to be done in visual C++ right now because the image processing will be done in C++, and I would like to have a uniform language in my project so as not to have problems with the delay in processing instructions, etc...I chose C++ for the speed of image processing. The problem is, I have no experience in using inpout32.dll for visual C++.

15th September 2005, 07:29 PM	(permalink)
danielsmusic	you need to inport the dll to the project! and the lib file. __________________ when you post that reply, im just kidding.

15th September 2005, 08:31 PM	(permalink)
jrz126	what operating system are you using? I'm using windows XP and I had a problem talking to my parallel port because there was something in the O.S. that blocked me from accessing it. I dunno if this is your problem or not, but I thought I'd throw it out there. ....edit: Nevermind, just scrolled through your link there and saw that the problem was fixed inside that DLL file. __________________ Jeff To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be.

16th September 2005, 02:46 PM	(permalink)
gastonanthony	I still don't understand, may someone please tell me what a dll does and what inpout32.dll does?I really have no clue yet

16th September 2005, 02:59 PM	(permalink)
Styx	a DLL is the windows equivelent of a .so file for Linux basically a shared libary of functions say you write a program and in that program you want to have a dialog box for choosing a file you can do two things 1) write one from scratch yourself 2) use the one provided by your operating system/Desktop manager number 2 is perfered since it simplifies your code by re-using someone elses code/function So you want to write a program that accesses the parallel port (linux this would be very easy btw). So you can do two things 1) write a low-level access to the BIOS to access and enumerate the parallel port 2) take advantage of someone elses hardwork and use their functions now this inpout32.dll will do this, it provides the nessacary fucntions to use the parallel port easily. To use it you need a header file (probably call inpout32.h) and do a #include at the start of your code This will give your code access to the functions contained within the DLL. Shared libaries aid in keeping things simple, why bother re-inventing/re-coding something that someone else has done I am a python programmer and the equiv is the import declaration to load in the ability to use functions that other ppl have written __________________ Nothing is impossible. Once a problem is realised, the rest is just details