parallelPort.cpp

/*
 * ViSP, open source Visual Servoing Platform software.
 * Copyright (C) 2005 - 2025 by Inria. All rights reserved.
 *
 * This software 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.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact Inria about acquiring a ViSP Professional
 * Edition License.
 *
 * See https://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * If you have questions regarding the use of this file, please contact
 * Inria at visp@inria.fr
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Description:
 * Example of parallel port management.
 */

 
#include <visp3/core/vpConfig.h>
#include <visp3/core/vpDebug.h>
 
#if defined VISP_HAVE_PARPORT
#include <iostream>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
 
#include <visp3/io/vpParallelPort.h>
#include <visp3/io/vpParseArgv.h>
 
// List of allowed command line options
#define GETOPTARGS "d:h"
 
#ifdef ENABLE_VISP_NAMESPACE
using namespace VISP_NAMESPACE_NAME;
#endif

void usage(const char *name, const char *badparam, unsigned char &data)
{
  fprintf(stdout, "\n\
Send a data to the parallel port.\n\
\n\
SYNOPSIS\n\
  %s [-d <data>] [-h]\n\
",
name);
 
  fprintf(stdout, "\n\
OPTIONS:                                               Default\n\
  -d <data>                                              %d\n\
     Data to send to the parallel port.\n\
     Value should be in [0:255].\n\
\n\
  -h\n\
     Print the help.\n\n",
          data);
 
  if (badparam) {
    fprintf(stderr, "ERROR: \n");
    fprintf(stderr, "\nBad parameter [%s]\n", badparam);
  }
}

bool getOptions(int argc, const char **argv, unsigned char &data)
{
  const char *optarg;
  int c;
 
  int value;
  while ((c = vpParseArgv::parse(argc, argv, GETOPTARGS, &optarg)) > 1) {
 
    switch (c) {
    case 'd': {
      value = atoi(optarg);
      if ((value < 0) || (value > 255)) {
        usage(argv[0], optarg, data);
        std::cerr << "ERROR: " << std::endl;
        std::cerr << "  Bad value \"-d " << optarg << "\"" << std::endl << std::endl;
        return false;
      }
      else {
        data = (unsigned char)value;
      }
      break;
    }
    case 'h':
      usage(argv[0], nullptr, data);
      return false;
 
    default:
      usage(argv[0], optarg, data);
      return false;
    }
  }
 
  if ((c == 1) || (c == -1)) {
    // standalone param or error
    usage(argv[0], nullptr, data);
    std::cerr << "ERROR: " << std::endl;
    std::cerr << "  Bad argument " << optarg << std::endl << std::endl;
    return false;
  }
 
  return true;
}

int main(int argc, const char **argv)
{
  // data to send to the parallel port
  unsigned char data = 0;
 
  // Read the command line options
  if (getOptions(argc, argv, data) == false) {
    return EXIT_FAILURE;
  }
  try {
 
    vpParallelPort parport;
 
    printf("Send data \"%d\" to the parallel port\n", data);
    parport.sendData(data);
 
  }
  catch (vpParallelPortException &e) {
    switch (e.getCode()) {
    case vpParallelPortException::opening:
      printf("Can't open the parallel port\n");
      break;
    case vpParallelPortException::closing:
      printf("Can't close the parallel port\n");
      break;
    }
  }
  catch (const vpException &e) {
    std::cout << "An error occurs: " << e.getMessage() << std::endl;
  }
  return EXIT_SUCCESS;
}
#else
int main()
{
  std::cout << "vpParallelPort class works only on unix..." << std::endl;
  return EXIT_SUCCESS;
}
#endif