swacload.c

支持数字元件仿真的SPICE插件

/*
 * Copyright (c) 1985 Gordon Jacobs
 */

#include "prefix.h"
#include <stdio.h>
#include "CKTdefs.h"
#include "SWdefs.h"
#include "SPerror.h"
#include "suffix.h"

RCSID("SWacLoad.c $Revision: 1.1 $ on $Date: 90/10/11 12:46:19 $")

int
SWacLoad(inModel,ckt)
    GENmodel *inModel;
    register CKTcircuit *ckt;
        /* load the current values into the 
         * sparse matrix previously provided 
         * during AC analysis.
         */
{
    register SWmodel *model = (SWmodel *)inModel;
    register SWinstance *here;
    double g_now;
    int current_state;

    /*  loop through all the switch models */
    for( ; model != NULL; model = model->SWnextModel ) {

        /* loop through all the instances of the model */
        for (here = model->SWinstances; here != NULL ;
                here=here->SWnextInstance) {

            /* In AC analysis, just propogate the state... */

            current_state = (int)*(ckt->CKTstate0 + here->SWstate);

            g_now = current_state?(model->SWonConduct):(model->SWoffConduct);

            *(here->SWposPosptr) += g_now;
            *(here->SWposNegptr) -= g_now;
            *(here->SWnegPosptr) -= g_now;
            *(here->SWnegNegptr) += g_now;
        }
    }
    return(OK);
}