/*
################################################################################
# Basic example of MDE8255-1 LPT usage
# This program flashes the LEDs on port B
#
# Created by: Travis Sidelinger <travis@ilive4code.net>
#
# Version History:
#   2005Oct22 : initial release
#
# Copyright:
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
################################################################################
*/
 
#define PORT0 0x378
#define PORT2 0x37A
 
// Includes
#include <stdio.h>
#include <unistd.h>
#include <sys/io.h>
#include <signal.h>
 
/* Fucntion Declarations */
static void sigcatch(int signum);       /* SIGALRM Signal Handler */
 
int main(void)
{
    /* Variables */
    static unsigned char c  = 1;
    static char m = 1;
 
    /* Main */
    signal(SIGINT, sigcatch);           /* set the timer catch */
 
    printf("Opening the port\n");
    ioperm(PORT0,3,1);
 
    printf("Setting the hardware mode to output on B\n");
    outb(0x80, PORT0);  /* put the device in output mode */
    outb(0x0F, PORT2);  /* control bits */
    outb(0x07, PORT2);  /* control bits */
    outb(0x0F, PORT2);  /* control bits */
 
    while(1)
    {
        printf("Toggling B\n");
        outb(0x55, PORT0);  /* data 55h */
        outb(0x0E, PORT2);  /* control bits */
        outb(0x06, PORT2);  /* control bits */
        outb(0x0E, PORT2);  /* control bits */
        sleep(1);
        printf("Toggling B\n");
        outb(0xAA, PORT0);  /* data AAh */
        outb(0x0E, PORT2);  /* control bits */
        outb(0x06, PORT2);  /* control bits */
        outb(0x0E, PORT2);  /* control bits */
        sleep(1);
        }
 
    /* End */
    return(0);
    }
 
/* SIGALRM Signal Handler */
void sigcatch(int signum)
{
    printf("Closing the port\n");
    ioperm(PORT0,3,0);
    exit(0);
    }