Parallel port access using Dev c++ in Windows

[Shailbond]

1. I am writing a program to access parallel port in Windows XP.
2. taking help from net i found a program called UserPort which opens ports.
3. Using a small program in C using stdio and conio include files i could access the port.
4. However the problem is i have to write code in C++ and when i try to compile the same code in C++ as a .cpp file the compiler gives an error saying "_outp undeclared " and " sleep undeclared". the same code compiles properly in c using same IDE.
5. I am using Dev-C++ 4.9.9.2. I cant use any other compiler.
6. My code is given below as a c file

/******
binary counter : This will count from 0 to 255 This takes printer port address as 0x378 and pauses for 250 mS between every count
*******/

include <stdio.h>

include <conio.h> /required for _outp/

int main()
{
int x;
for(x = 0;x<=255;x++)
{
_outp(0x378,x);
sleep(250);
}
return 0;
}

1. Pl help. Its urgent as same code doesnt work when compiled as C++ file.

Shaleen Singh

[Anonymous]

The _outp() function is declared in Microsoft's conio.h - however if you have a conio.h file at all, it is likely to be a clone of the Borland library header (which is very different). Moreover direct hardware I/O will not work at all in NT/2K/XP because they are kernel protected resources, you will need a port I/O driver.

Clifford

[Osito]

I've always just used window.h and Sleep(), which works with C and C++. I checked my header files and I don't even have "sleep" defined anywhere, so you must be doing something different if that worked for you in C. I do have _sleep, and I stuck it into a C++ prog and it did compile with stdlib.h included. Hope that helps.

[Osito]

Sorry that should be windows.h, duh. Too early in the morning.

[Shailbond]

Thanks guys windows.h and stdlib.h both solved my problem of Sleep function. both Sleep and _sleep are working, but what about _outp function. Is there any other function to output data to a parallel port in Dev c++.