pre_post_group_spikegen.cpp

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/* 
 * Copyright (c) 2014 Regents of the University of California. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. The names of its contributors may not be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * *********************************************************************************************** *
 * CARLsim
 * created by:      (MDR) Micah Richert, (JN) Jayram M. Nageswaran
 * maintained by:   (MA) Mike Avery <averym@uci.edu>, (MB) Michael Beyeler <mbeyeler@uci.edu>,
 *                  (KDC) Kristofor Carlson <kdcarlso@uci.edu>
 *                  (TSC) Ting-Shuo Chou <tingshuc@uci.edu>
 *
 * CARLsim available from http://socsci.uci.edu/~jkrichma/CARLsim/
 * Ver 11/26/2014
 */ 
#include <pre_post_group_spikegen.h>

PrePostGroupSpikeGenerator::PrePostGroupSpikeGenerator(int interSpikeInterval, int offsetToFirstGroup, int firstGroup, int secondGroup) {
    isi = interSpikeInterval;
    offset = offsetToFirstGroup;
    g1 = firstGroup;
    g2 = secondGroup;
    setOffset = false;
}

unsigned int PrePostGroupSpikeGenerator::nextSpikeTime(CARLsim* s, int grpId, int nid, unsigned int currentTime, 
    unsigned int lastScheduledSpikeTime, unsigned int endOfTimeSlice) {
    if (grpId == g1)
        return lastScheduledSpikeTime + isi;
    else if (grpId == g2) {
        if (!setOffset) {
            setOffset = true;
            return lastScheduledSpikeTime + isi + offset;
        } else
            return lastScheduledSpikeTime + isi;
    }

    return 0xFFFFFFFF;
}

void PrePostGroupSpikeGenerator::updateOffset(int newOffset) {
    offset = newOffset;
    setOffset = false;
}