Hi
Iīm making a program which will access my computers parallel port (I made a simple device to attach to it).
But when i try to open the port at adress 0x378 it says that canīt find the port....
How can i install a parallel port on my system??
Iīm using Mandriva 2005 Limited Edition.
The sample program that i use to test the por is listed below.
Tks to all for an help.
Best regards!
include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <asm/io.h>
#define base 0x378 /* printer port base address */
main(int argc, char **argv)
{
int value;
if (argc!=2)
fprintf(stderr, "Error: Wrong number of arguments. This program needs one argument which is number between 0 and 255.\n"), exit(1);
if (sscanf(argv[1],"%i",&value)!=1)
fprintf(stderr, "Error: Parameter is not a number.\n"), exit(1);
if ((value<0) || (value>255))
fprintf(stderr, "Error: Invalid numeric value. The parameter number must be between 0 and 255\n"), exit(1);
if (ioperm(base,1,1))
fprintf(stderr, "Error: Couldn't get the port at %x\n", base), exit(1);
outb((unsigned char)value, base);
}
//Written and copyright by Tomi Engdahl 1998
