/**

  * 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;

 }