--- /dev/null
+/* atlc - arbitrary transmission line calculator, for the analysis of
+transmission lines are directional couplers.
+
+Copyright (C) 2002. Dr. David Kirkby, PhD (G8WRB).
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either package_version 2
+of the License, or (at your option) any later package_version.
+
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+USA.
+
+Dr. David Kirkby, e-mail drkirkby at gmail.com
+
+*/
+
+#include "config.h"
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include "definitions.h"
+#include "exit_codes.h"
+
+extern double Er1, Er2;
+extern double Ers[];
+extern int colours[];
+
+void convert_create_create_bmp_for_coupled_microstrip_dimensions_to_integers(struct transmission_line_properties *pcb)
+{
+ /* A number of paramters are set to -1, as otherwise the compiler
+ complains they may be used unitialised. It is wise to check they
+ are not -1 before assining a variable to their contents,
+ but I can't be bothered. */
+ int best_W=-1, best_H=-1, best_w=-1, best_s=-1, best_g=-1;
+ int best_h=-1, best_t=-1;
+ int min, max, lowest = 2500, highest=10000;
+ int i;
+ double max_gridsize, min_gridsize;
+ double error, error_min=VERY_LARGE, gridsize=-1, best_grid_size=-1;
+
+
+ /* scale grid size, according to a command line option */
+ lowest*=(int) 0.5+pow(2.0,(double)pcb->bmp_size);
+ highest*=(int) 0.5+pow(2.0,(double)pcb->bmp_size);
+
+ max_gridsize=sqrt(pcb->WW*pcb->HH/(double )lowest); /* minimum dimension in m */
+ min_gridsize=sqrt(pcb->WW*pcb->HH/(double )highest);
+ if(pcb->WW>=pcb->HH)
+ {
+ min=pcb->WW/max_gridsize;
+ max=pcb->WW/min_gridsize;
+ }
+ else
+ {
+ min=pcb->HH/max_gridsize;
+ max=pcb->HH/min_gridsize;
+ }
+ if (pcb->verbose_level >= 2)
+ printf("WW=%f HH=%f lowest=%d higherst = %d min=%d max=%d\n",pcb->WW,pcb->HH,lowest, highest, min, max);
+ for(i=min;i<=max;++i)
+ {
+ /* Try various combinations for H,a,b,c, etc */
+ if(pcb->W>pcb->H)
+ gridsize=pcb->WW/i;
+ else
+ gridsize=pcb->HH/i;
+ pcb->W=(int)(pcb->WW/gridsize + 0.5);
+ pcb->H=(int)(pcb->HH/gridsize + 0.5);
+ pcb->w=(int)(pcb->ww/gridsize + 0.5);
+ pcb->s=(int)(pcb->ss/gridsize + 0.5);
+ pcb->g=(int)(pcb->gg/gridsize + 0.5);
+ pcb->h=(int)(pcb->hh/gridsize + 0.5);
+ pcb->t=(int)(pcb->tt/gridsize + 0.5);
+ error=0.0;
+ /*error+=pow((pcb->WW-pcb->W*gridsize)/pcb->WW,2.0); */ /* relative error in W */
+ /*error+=pow((pcb->HH-pcb->H*gridsize)/pcb->HH,2.0); */
+ if(pcb->w>0)
+ error+=pow((pcb->ww-pcb->w*gridsize)/pcb->ww,2.0);
+ if(pcb->s>0)
+ error+=pow((pcb->ss-pcb->s*gridsize)/pcb->ss,2.0);
+ if(pcb->g>0)
+ error+=pow((pcb->gg-pcb->g*gridsize)/pcb->gg,2.0);
+ if(pcb->h>0)
+ error+=pow((pcb->hh-pcb->h*gridsize)/pcb->hh,2.0);
+ if(pcb->t>0)
+ error+=pow((pcb->tt-pcb->t*gridsize)/pcb->tt,2.0);
+ if(error < (error_min-TINY))
+ {
+ error_min=error;
+ best_W=pcb->W;
+ best_H=pcb->H;
+ best_w=pcb->w;
+ best_s=pcb->s;
+ best_g=pcb->g;
+ best_h=pcb->h;
+ best_t=pcb->t;
+ best_grid_size=gridsize;
+ }
+ }
+ pcb->W=best_W;
+ pcb->H=best_H;
+ pcb->w=best_w;
+ pcb->s=best_s;
+ pcb->g=best_g;
+ pcb->h=best_h;
+ pcb->t=best_t;
+ if(pcb->verbose_level > 0)
+ {
+ fprintf(stderr,"error_min=%.16f\n",error_min);
+ fprintf(stderr,"User requested: W=%f H=%f w=%f s=%f g=%f h=%f t=%f Er1=%f Er2=%f\n\n",pcb->WW,pcb->HH,pcb->ww,pcb->ss,pcb->gg,pcb->hh,pcb->tt,Er1,Er2);
+ fprintf(stderr,"Internally the program is using the following grid:\n");
+ fprintf(stderr,"W=%d H=%d w=%d s=%d g=%d h=%d t=%d\nThe grid size is %f mm, inches or whatever\n\n", pcb->W, pcb->H, pcb->w, pcb->s, pcb->g,pcb->h, pcb->t,best_grid_size);
+ if(error_min > TINY)
+ {
+ fprintf(stderr,"This means we are simulating a transmission line with these dimensions:\n");
+ fprintf(stderr,"W=%f H=%f w=%f s=%f g=%f h=%f t=%f (mm, inches or whatever)\n",pcb->W*best_grid_size,pcb->H*best_grid_size,pcb->w*best_grid_size,pcb->s*best_grid_size,pcb->g*best_grid_size,pcb->h*best_grid_size,pcb->t*best_grid_size);
+ fprintf(stderr,"\nThese are slightly different to what you indicated on the command line,\n");
+ fprintf(stderr,"but they are the best approximation possible, given the grid size\n");
+ }
+ }
+ if(pcb->s == 0)
+ {
+ fprintf(stderr,"Error #12. The gap between the two conductors coupled lines (s) is too small. Either increase the bitmap size (-b option), or make s at least %f\n",gridsize);
+ exit_with_msg_and_exit_code("",GAP_BETWEEN_CONDUCTORS_TOO_SMALL);
+ }
+ if(pcb->g == 0)
+ {
+ fprintf(stderr,"Error #13. The gap between the groundplane (g) and coupled lines is too small. Either increase the bitmap size (-b option), or make g at least %f\n",gridsize);
+ exit_with_msg_and_exit_code("",GAP_BETWEEN_CONDUCTORS_TOO_SMALL);
+ }
+ if(pcb->h == 0)
+ {
+ fprintf(stderr,"Error #14. The thickness of the dielectric of Er2 (h) is too small. Either increase the bitmap size (-b option), or make h at least %f\n",gridsize);
+ exit_with_msg_and_exit_code("",GAP_BETWEEN_CONDUCTORS_TOO_SMALL);
+ }
+ check_error(pcb->WW,pcb->W,best_grid_size,"W");
+ check_error(pcb->HH,pcb->H,best_grid_size,"H");
+ check_error(pcb->ww,pcb->w,best_grid_size,"w");
+ check_error(pcb->ss,pcb->s,best_grid_size,"s");
+ check_error(pcb->gg,pcb->g,best_grid_size,"g");
+ check_error(pcb->hh,pcb->h,best_grid_size,"h");
+ check_error(pcb->tt,pcb->t,best_grid_size,"t");
+}
projects / debian / atlc / blobdiff