/* -*- c++ -*- */

/*

 * Copyright 2001,2003 Free Software Foundation, Inc.

 * 

 * This file is part of GNU Radio

 * 

 * GNU Radio 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, or (at your option)

 * any later version.

 * 

 * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to

 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

#ifndef INCLUDED_PPIO_H

#define INCLUDED_PPIO_H

#include <boost/shared_ptr.hpp>

class ppio;

typedef boost::shared_ptr<ppio> ppio_sptr;

/*!

 * \brief abstract class that provides low level access to parallel port bits

 */

class ppio {

 public:

  ppio () {}

  virtual ~ppio ();

  virtual void write_data (unsigned char v) = 0;

  virtual unsigned char read_data () = 0;

  virtual void write_control (unsigned char v) = 0;

  virtual unsigned char read_control () = 0;

  virtual unsigned char read_status () = 0;

  virtual void lock () = 0;

  virtual void unlock () = 0;

};

/*!

 * \brief Factory method.  

 *

 * Split out from class to make life easier for SWIG

 */

ppio_sptr make_ppio (int which_pp);

#endif /* INCLUDED_PPIO_H */