/**

 * LPT signal generator

 * Copyright © 2017 František Kučera (frantovo.cz)

 *

 * 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 3 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, see <http://www.gnu.org/licenses/>.

 */

#include <stdlib.h>

#include <iostream>

#include <stdio.h>

#include <math.h>

#include <sys/io.h>

#include <unistd.h>

using namespace std;

// g++ lpt.cpp && ./a.out

int main() {

  cout << "LPT!" << endl;

  //int addr = 0x378; // parport0

  int addr = 0xe400; // parport1

  //int addr = 0x278;

  //int addr = 0xc800;

  if (ioperm(addr,1,1)) { fprintf(stderr, "Access denied to %x\n", addr), exit(1); }

  for (int i = 0; i < 30; i++) {

    cout << "cyklus" << endl;

    usleep(100*1000);

    outb(0b11111111, addr);

    usleep(10*1000);

    outb(0b00000000, addr);

  }

  cout << "hotovo" << endl;

}