garmin_serial.cp

Garble is a C++ program for transferring data to and from Garmin GPS

// $Id: garmin_serial.cp,v 1.1.1.1 2000/02/21 06:17:23 decouto Exp $
// garmin_serial.cp
// Douglas S. J. De Couto
// September 9, 1998

// Copyright (C) 1998 Douglas S. J. De Couto
// <[e-mail]>
//
// 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.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#include "garmin_serial.h"

void 
garmin_serial::putbyte(const garmin::uint8 c) throw (garmin::not_possible)
{
	if (!m_init) {
		throw garmin::not_possible("The garmin physical protocol layer is not initialized");
	}
	
	try {
		m_port->putchar(c);
	}
	catch (...) {
		// lame error handling...
		throw garmin::not_possible("There has been a serial port error");
	}
}



garmin::uint8 
garmin_serial::getbyte(void) throw (garmin::not_possible)
{
	if (!m_init) {
		throw garmin::not_possible("The garmin physical protocol layer is not initialized");
	}

	try {
		return m_port->getchar();
	}
	catch (serial_port::timeout) {
		throw garmin::timeout("There has been a communications timeout on the serial port");
	}
	catch (...) {
		throw garmin::not_possible("There has been a serial port error");
	}
	return 0;
}