dctran.c

spice中支持多层次元件模型仿真的可单独运行的插件源码

#endif /* SENSDEBUG */
        }
#endif
        return(OK);
    }
    if( (*(SPfrontEnd->IFpauseTest))() ) {
        /* user requested pause... */
        ckt->CKTcurrentAnalysis = DOING_TRAN;
        ckt->CKTstat->STATtranTime += (*(SPfrontEnd->IFseconds))()-startTime;
        ckt->CKTstat->STATtranIter += ckt->CKTstat->STATnumIter - startIters;
        ckt->CKTstat->STATtranDecompTime += ckt->CKTstat->STATdecompTime -
                startdTime;
        ckt->CKTstat->STATtranSolveTime += ckt->CKTstat->STATsolveTime -
                startsTime;
        ckt->CKTstat->STATtranLoadTime += ckt->CKTstat->STATloadTime -
                startlTime;
        ckt->CKTstat->STATtranCombTime += ckt->CKTstat->STATcombineTime -
                startcTime;
        ckt->CKTstat->STATtranSyncTime += ckt->CKTstat->STATsyncTime -
                startkTime;
        return(E_PAUSE);
    }
resume:
#ifdef STEPDEBUG
    if( (ckt->CKTdelta <= ckt->CKTfinalTime/50) && 
            (ckt->CKTdelta <= ckt->CKTmaxStep)) {
            ;
    } else {
        if(ckt->CKTfinalTime/50<ckt->CKTmaxStep) {
            (void)printf("limited by Tstop/50\n");
        } else {
            (void)printf("limited by Tmax\n");
        }
    }
#endif
    ckt->CKTdelta = 
            MIN(ckt->CKTdelta,ckt->CKTmaxStep);
	/* are we at a breakpoint, or indistinguishably close? */
    if ((ckt->CKTtime == *(ckt->CKTbreaks)) || (*(ckt->CKTbreaks) -
    				(ckt->CKTtime) <= ckt->CKTdelmin)) {
        /* first timepoint after a breakpoint - cut integration order */
        /* and limit timestep to .1 times minimum of time to next breakpoint,
         *  and previous timestep
         */
        ckt->CKTorder = 1;
#ifdef STEPDEBUG
        if( (ckt->CKTdelta >.1* ckt->CKTsaveDelta) ||
                (ckt->CKTdelta > .1*(*(ckt->CKTbreaks+1)-*(ckt->CKTbreaks))) ) {
            if(ckt->CKTsaveDelta < (*(ckt->CKTbreaks+1)-*(ckt->CKTbreaks)))  {
                (void)printf("limited by pre-breakpoint delta\n");
            } else {
                (void)printf("limited by next breakpoint\n");
            }
        }
#endif
#ifdef HAS_SHORTMACRO
            mt= MIN(ckt->CKTsaveDelta, *(ckt->CKTbreaks+1)-*(ckt->CKTbreaks));
            ckt->CKTdelta = MIN(ckt->CKTdelta, .1 * mt);
#else
            ckt->CKTdelta = MIN(ckt->CKTdelta, .1 * MIN(ckt->CKTsaveDelta,
                    *(ckt->CKTbreaks+1)-*(ckt->CKTbreaks)));
#endif
        if(firsttime) {
            ckt->CKTdelta /= 10;
#ifdef STEPDEBUG
            (void)printf("delta cut for initial timepoint\n");
#endif
        } 

	/* don't want to get below delmin for no reason */
	ckt->CKTdelta = MAX(ckt->CKTdelta, ckt->CKTdelmin*2.0);
    }
    else if(ckt->CKTtime + ckt->CKTdelta >= *(ckt->CKTbreaks)) {
        ckt->CKTsaveDelta = ckt->CKTdelta;
        ckt->CKTdelta = *(ckt->CKTbreaks) - ckt->CKTtime;
#ifdef STEPDEBUG
        (void)printf("delta cut to hit breakpoint\n");
#endif
        ckt->CKTbreak = 1; /* why? the current pt. is not a bkpt. */
    }

#ifdef PARALLEL_ARCH
    DGOP_( &type, &(ckt->CKTdelta), &length, "min" );
#endif /* PARALLEL_ARCH */

    for(i=5;i>=0;i--) {
        ckt->CKTdeltaOld[i+1]=ckt->CKTdeltaOld[i];
    }
    ckt->CKTdeltaOld[0]=ckt->CKTdelta;

    temp = ckt->CKTstates[ckt->CKTmaxOrder+1];
    for(i=ckt->CKTmaxOrder;i>=0;i--) {
        ckt->CKTstates[i+1] = ckt->CKTstates[i];
    }
    ckt->CKTstates[0] = temp;

/* 600 */
    while (1) {
        olddelta=ckt->CKTdelta;
        /* time abort? */
        ckt->CKTtime += ckt->CKTdelta;
        ckt->CKTdeltaOld[0]=ckt->CKTdelta;
        NIcomCof(ckt);
#ifdef PREDICTOR
        error = NIpred(ckt);
#endif /* PREDICTOR */
        save_mode = ckt->CKTmode;
        save_order = ckt->CKTorder;
        converged = NIiter(ckt,ckt->CKTtranMaxIter);
        ckt->CKTstat->STATtimePts ++;
        ckt->CKTmode = (ckt->CKTmode&MODEUIC)|MODETRAN | MODEINITPRED;
        if(firsttime) {
            for(i=0;i<ckt->CKTnumStates;i++) {
                *(ckt->CKTstate2+i) = *(ckt->CKTstate1+i);
                *(ckt->CKTstate3+i) = *(ckt->CKTstate1+i);
            }
        }
        if(converged != 0) {
            ckt->CKTtime = ckt->CKTtime -ckt->CKTdelta;
            ckt->CKTstat->STATrejected ++;
            ckt->CKTdelta = ckt->CKTdelta/8;
#ifdef STEPDEBUG
            (void)printf("delta cut for non-convergence\n");
#endif
            if(firsttime) {
                ckt->CKTmode = (ckt->CKTmode&MODEUIC)|MODETRAN | MODEINITTRAN;
            }
            ckt->CKTorder = 1;
        } else {
            if (firsttime) {
#ifdef HAS_SENSE2
                if(ckt->CKTsenInfo && (ckt->CKTsenInfo->SENmode & TRANSEN)){
                    save1 = ckt->CKTmode;
                    save2 = ckt->CKTorder;
                    ckt->CKTmode = save_mode;
                    ckt->CKTorder = save_order;
                    if(error = CKTsenDCtran(ckt)) return(error);
                    ckt->CKTmode = save1;
                    ckt->CKTorder = save2;
                }
#endif
                firsttime =0;
                goto nextTime;  /* no check on
                                 * first time point
                                 */
            }
            new = ckt->CKTdelta;
            error = CKTtrunc(ckt,&new);
            if(error) {
                ckt->CKTcurrentAnalysis = DOING_TRAN;
                ckt->CKTstat->STATtranTime += 
                        (*(SPfrontEnd->IFseconds))()-startTime;
                ckt->CKTstat->STATtranIter += 
                        ckt->CKTstat->STATnumIter - startIters;
                ckt->CKTstat->STATtranDecompTime += ckt->CKTstat->STATdecompTime
                        - startdTime;
                ckt->CKTstat->STATtranSolveTime += ckt->CKTstat->STATsolveTime
                        - startsTime;
		ckt->CKTstat->STATtranLoadTime += ckt->CKTstat->STATloadTime
			- startlTime;
		ckt->CKTstat->STATtranCombTime += ckt->CKTstat->STATcombineTime
			- startcTime;
		ckt->CKTstat->STATtranSyncTime += ckt->CKTstat->STATsyncTime
			- startkTime;
                return(error);
            }
            if(new>.9 * ckt->CKTdelta) {
                if(ckt->CKTorder == 1) {
                    new = ckt->CKTdelta;
                    ckt->CKTorder = 2;
                    error = CKTtrunc(ckt,&new);
                    if(error) {
                        ckt->CKTcurrentAnalysis = DOING_TRAN;
                        ckt->CKTstat->STATtranTime += 
                                (*(SPfrontEnd->IFseconds))()-startTime;
                        ckt->CKTstat->STATtranIter += 
                                ckt->CKTstat->STATnumIter - startIters;
                        ckt->CKTstat->STATtranDecompTime += 
                                ckt->CKTstat->STATdecompTime - startdTime;
                        ckt->CKTstat->STATtranSolveTime += 
                                ckt->CKTstat->STATsolveTime - startsTime;
			ckt->CKTstat->STATtranLoadTime +=
				ckt->CKTstat->STATloadTime - startlTime;
			ckt->CKTstat->STATtranCombTime +=
				ckt->CKTstat->STATcombineTime - startcTime;
			ckt->CKTstat->STATtranSyncTime +=
				ckt->CKTstat->STATsyncTime - startkTime;
                        return(error);
                    }
                    if(new <= 1.05 * ckt->CKTdelta) {
                        ckt->CKTorder = 1;
                    }
                }
                /* time point OK  - 630*/
                ckt->CKTdelta = new;
#ifdef STEPDEBUG
                (void)printf(
                    "delta set to truncation error result:point accepted\n");
#endif
#ifdef HAS_SENSE2
                if(ckt->CKTsenInfo && (ckt->CKTsenInfo->SENmode & TRANSEN)){
                    save1 = ckt->CKTmode;
                    save2 = ckt->CKTorder;
                    ckt->CKTmode = save_mode;
                    ckt->CKTorder = save_order;
                    if(error = CKTsenDCtran(ckt)) return(error);
                    ckt->CKTmode = save1;
                    ckt->CKTorder = save2;
                }
#endif
                /* go to 650 - trapezoidal */
                goto nextTime;
            } else {
                ckt->CKTtime = ckt->CKTtime -ckt->CKTdelta;
                ckt->CKTstat->STATrejected ++;
                ckt->CKTdelta = new;
#ifdef STEPDEBUG
                (void)printf(
                    "delta set to truncation error result:point rejected\n");
#endif
            }
        }
#ifdef PARALLEL_ARCH
	DGOP_( &type, &(ckt->CKTdelta), &length, "min" );
#endif /* PARALLEL_ARCH */

        if (ckt->CKTdelta <= ckt->CKTdelmin) {
            if (olddelta > ckt->CKTdelmin) {
                ckt->CKTdelta = ckt->CKTdelmin;
#ifdef STEPDEBUG
                (void)printf("delta at delmin\n");
#endif
            } else {
                ckt->CKTcurrentAnalysis = DOING_TRAN;
                ckt->CKTstat->STATtranTime += 
                        (*(SPfrontEnd->IFseconds))()-startTime;
                ckt->CKTstat->STATtranIter += 
                        ckt->CKTstat->STATnumIter - startIters;
                ckt->CKTstat->STATtranDecompTime += 
                        ckt->CKTstat->STATdecompTime - startdTime;
                ckt->CKTstat->STATtranSolveTime += 
                        ckt->CKTstat->STATsolveTime - startsTime;
		ckt->CKTstat->STATtranLoadTime +=
			ckt->CKTstat->STATloadTime - startlTime;
		ckt->CKTstat->STATtranCombTime +=
			ckt->CKTstat->STATcombineTime - startcTime;
		ckt->CKTstat->STATtranSyncTime +=
			ckt->CKTstat->STATsyncTime - startkTime;
		errMsg = CKTtrouble((GENERIC *) ckt, "Timestep too small");
                return(E_TIMESTEP);
            }
        }
    }
    /* NOTREACHED */
}