SerialPortIODevice.h

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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4; -*-
// vim: set shiftwidth=4 softtabstop=4 expandtab:
/*
 ********************************************************************
 ** NIDAS: NCAR In-situ Data Acquistion Software
 **
 ** 2011, Copyright University Corporation for Atmospheric Research
 **
 ** 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.
 **
 ** The LICENSE.txt file accompanying this software contains
 ** a copy of the GNU General Public License. If it is not found,
 ** write to the Free Software Foundation, Inc.,
 ** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 **
 ********************************************************************
*/
#ifndef NIDAS_CORE_SERIALPORTIODEVICE_H
#define NIDAS_CORE_SERIALPORTIODEVICE_H

#include "UnixIODevice.h"
#include <nidas/util/Termios.h>
#include <nidas/util/IOTimeoutException.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>

#ifdef DEBUG
#include <iostream>
#endif

namespace nidas { namespace core {

class SerialPortIODevice : public UnixIODevice {

public:

    SerialPortIODevice():
        UnixIODevice(),_termios(),_rts485(0),_usecsperbyte(0)
    {
        _termios.setRaw(true);
        _termios.setRawLength(1);
        _termios.setRawTimeout(0);
    }

    SerialPortIODevice(const std::string& name):
        UnixIODevice(name),_termios(),_rts485(0),_usecsperbyte(0)
    {
        _termios.setRaw(true);
        _termios.setRawLength(1);
        _termios.setRawTimeout(0);
    }

    ~SerialPortIODevice() {}

    void open(int flags) throw(nidas::util::IOException);

    void applyTermios() throw(nidas::util::IOException)
    {
        _termios.apply(_fd,getName());
    }

    nidas::util::Termios& termios() { return _termios; }

    int getUsecsPerByte() const;

    void setRTS485(int val) throw(nidas::util::IOException);

    size_t write(const void *buf, size_t len) throw(nidas::util::IOException);

protected:

    nidas::util::Termios _termios;

    int _rts485;

    unsigned int _usecsperbyte;

};

}}  // namespace nidas namespace core

#endif