example-dynamic.cpp

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/* ------------------------------------------------------------------------- */
/* file example1-dynamic.cpp                                                                 */
/* ------------------------------------------------------------------------- */
/*   Copyright (C) 2011 Peter Milne, D-TACQ Solutions Ltd
 *                      <Peter dot Milne at D hyphen TACQ dot com>
 *  Created on: Sep 14, 2011
 *      Author: pgm

    http://www.d-tacq.com

    This program is free software; you can redistribute it and/or modify
    it under the terms of Version 2 of the GNU General Public License
    as published by the Free Software Foundation;

    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., 675 Mass Ave, Cambridge, MA 02139, USA.                */
/* ------------------------------------------------------------------------- */

/** @file example-dynamic.cpp example with dynamic system load.
 *
 * Example usage:
 * @verbatim
LL2_SYSFILE=xml/example1-krypton.xml LL_OUTPUTS=data/ai-ramps.dat ./example-dynamic -v 2 -n 10000 100


LL2_SYSFILE : xml system definition
LL_OUTPUTS  : data file for AO data. DO is alternating all 1's.

./example-dynamic : run this program
-v 2                    : verbose
-n 10000                : for 10k samples
100                             : ECM 100 eg 100usec cycle with 1MHz SYSCLK

   @endverbatim
 */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <assert.h>

#include "ll2.h"
#include "testharness.h"

/** environment variable defines config_file */
#define LL2_SYSFILE     "LL2_SYSFILE"

/** default config_file */
#define LL2_SYSFILE_DEFAULT     "xml/example1.xml"

/** example program with dynamic system instantiation from config_file*/
int main(int argc, const char* argv[])
{
        const char* sysfile =
                        getenv(LL2_SYSFILE)? getenv(LL2_SYSFILE): LL2_SYSFILE_DEFAULT;
        LL_ControlSystem& the_system = LL_ControlSystem::createFromFile(sysfile);

        the_system.init(argc, argv);

        const int SAMPLES = the_system.getSamples();
        Outputs outputs(the_system.getAO_count(), the_system.getDO_count());
        Inputs inputs(SAMPLES,
                        the_system.getAI_count(),
                        the_system.getDI_count(), the_system.getStatus_count());

        the_system.Arm(outputs.getAO(0), outputs.getDO(0));

        for (int ii = 0; ii < SAMPLES; ++ii){
                int rc = the_system.IO(
                                outputs.getAO(ii), outputs.getDO(ii),
                                inputs.getAI(ii), inputs.getDI(ii), inputs.getStatus(ii));
        }

        the_system.Stop();
        LL_ControlSystem::closedown(the_system);
}