ltra.c

linux平台下类似著名的电路板作图软件 Spice的源代码

/**********
Copyright 1990 Regents of the University of California.  All rights
reserved.
Author: 1990 Jaijeet S. Roychowdhury
**********/

/*
 * This file defines the LTRA data structures that are available to the
 * next level(s) up the calling hierarchy
 */

#include "spice.h"
#include <stdio.h>
#include "devdefs.h"
#include "ifsim.h"
#include "ltradefs.h"
#include "suffix.h"

IFparm LTRApTable[] = { /* parameters */ 
 IOPAU( "v1", LTRA_V1,   IF_REAL   , "Initial voltage at end 1"),
 IOPAU( "v2", LTRA_V2,   IF_REAL   , "Initial voltage at end 2"),
 IOPAU( "i1", LTRA_I1,   IF_REAL   , "Initial current at end 1"),
 IOPAU( "i2", LTRA_I2,   IF_REAL   , "Initial current at end 2"),
 IP("ic", LTRA_IC,   IF_REALVEC,"Initial condition vector:v1,i1,v2,i2"),
 OPU("pos_node1", LTRA_POS_NODE1,IF_INTEGER,"Positive node of end 1 of t-line"),
 OPU("neg_node1", LTRA_NEG_NODE1,IF_INTEGER,"Negative node of end 1 of t.line"),
 OPU("pos_node2", LTRA_POS_NODE2,IF_INTEGER,"Positive node of end 2 of t-line"),
 OPU("neg_node2", LTRA_NEG_NODE2,IF_INTEGER,"Negative node of end 2 of t-line")
};

IFparm LTRAmPTable[] = { /* model parameters */
 IOP( "ltra",	LTRA_MOD_LTRA,	IF_FLAG,	"LTRA model"),
 IOPU( "r", LTRA_MOD_R,   IF_REAL   , "Resistance per metre"),
 IOPAU( "l", LTRA_MOD_L,   IF_REAL   , "Inductance per metre"),
 IOPR( "g", LTRA_MOD_G,   IF_REAL   , "Conductance per metre"),
 IOPAU( "c", LTRA_MOD_C,   IF_REAL   , "Capacitance per metre"),
 IOPU( "len", LTRA_MOD_LEN,   IF_REAL   , "length of line"),
 OP( "rel", LTRA_MOD_RELTOL, IF_REAL, "Rel. rate of change of deriv. for bkpt"),
 OP( "abs", LTRA_MOD_ABSTOL, IF_REAL, "Abs. rate of change of deriv. for bkpt"),

 IOPU("nocontrol", LTRA_MOD_NOCONTROL, IF_FLAG,	"No timestep control"),
 IOPU( "steplimit", LTRA_MOD_STEPLIMIT, IF_FLAG,
	 "always limit timestep to 0.8*(delay of line)"),
 IOPU( "nosteplimit", LTRA_MOD_NOSTEPLIMIT, IF_FLAG,
	 "don't always limit timestep to 0.8*(delay of line)"),
 IOPU( "lininterp", LTRA_MOD_LININTERP, IF_FLAG, "use linear interpolation"),
 IOPU("quadinterp", LTRA_MOD_QUADINTERP, IF_FLAG, "use quadratic interpolation"),
 IOPU("mixedinterp", LTRA_MOD_MIXEDINTERP, IF_FLAG,
	 "use linear interpolation if quadratic results look unacceptable"),
 IOPU("truncnr", LTRA_MOD_TRUNCNR, IF_FLAG,
	 "use N-R iterations for step calculation in LTRAtrunc"),
 IOPU( "truncdontcut", LTRA_MOD_TRUNCDONTCUT, IF_FLAG,
    "don't limit timestep to keep impulse response calculation errors low"),
 IOPAU( "compactrel", LTRA_MOD_STLINEREL, IF_REAL,
	 "special reltol for straight line checking"),
 IOPAU( "compactabs", LTRA_MOD_STLINEABS, IF_REAL,
	 "special abstol for straight line checking")

#ifdef notdef
 IOP( "f",  LTRA_MOD_FREQ, IF_REAL   , "Frequency"),
 IOP( "nl", LTRA_MOD_NL,   IF_REAL   , "Normalized length at frequency given"),
 IOP("fullcontrol", LTRA_MOD_FULLCONTROL, IF_FLAG, "rigorous timestep control"),
 IOP("halfcontrol", LTRA_MOD_HALFCONTROL, IF_FLAG,
	 "only the current step is considered for timestep control"),
 IOP( "print", LTRA_MOD_PRINT, IF_FLAG, "printing of debugging info on"),
 IOP( "noprint", LTRA_MOD_NOPRINT, IF_FLAG, "printing of debugging info off"),
 IOP( "ronly", LTRA_MOD_RONLY, IF_FLAG, "use special load routines for G=0"),
 IOP( "choprel", LTRA_MOD_CHOPREL, IF_REAL,
	 "special reltol for truncation of impulse responses"),
 IOP( "chopabs", LTRA_MOD_CHOPABS, IF_REAL,
	 "special abstol for truncation of impulse responses "),
#endif
};

char *LTRAnames[] = {
    "P1+",
    "P1-",
    "P2+",
    "P2-"
};

int	LTRAnSize = NUMELEMS(LTRAnames);
int	LTRApTSize = NUMELEMS(LTRApTable);
int	LTRAmPTSize = NUMELEMS(LTRAmPTable);
int	LTRAiSize = sizeof(LTRAinstance);
int	LTRAmSize = sizeof(LTRAmodel);