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   1 /*
   2  * Copyright © 2012 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 namespace Footprint {
  19
  20         /* process clearance requirement */
  21         public real process_clearance = 0.6;
  22
  23         public int mm2mils100(real mm) = floor (mm / 25.4 * 1000 * 100 + 0.5);
  24
  25         public void element_start(string name) {
  26                 printf ("# author: Keith Packard\n");
  27                 printf ("# email: keithp@keithp.com\n");
  28                 printf ("# dist-license: GPL 2\n");
  29                 printf ("# use-license: unlimited\n");
  30                 printf ("Element [\"\" \"%s\" \"\" \"\" 0 0 0 0 0 100 \"\"]\n",
  31                         name);
  32                 printf ("(\n");
  33
  34         }
  35
  36         public void element_end() {
  37                 printf (")\n");
  38         }
  39
  40         public void pad_mm_clear(real center_x,
  41                                  real center_y,
  42                                  real width,
  43                                  real height,
  44                                  real clearance,
  45                                  string name,
  46                                  string num)
  47         {
  48                 real    x1 = 0;
  49                 real    y1 = 0;
  50                 real    x2 = 0;
  51                 real    y2 = 0;
  52                 real    thickness = 0;
  53
  54                 if (width > height) {
  55                         thickness = height;
  56                         y1 = center_y;
  57                         x1 = center_x - (width - height) / 2;
  58                         y2 = center_y;
  59                         x2 = center_x + (width - height) / 2;
  60                 } else {
  61                         thickness = width;
  62                         x1 = center_x;
  63                         y1 = center_y - (height - width) / 2;
  64                         x2 = center_x;
  65                         y2 = center_y + (height - width) / 2;
  66                 }
  67
  68                 real mask = thickness + clearance / 2;
  69
  70                 printf ("    Pad[");
  71                 printf (" %6d %6d %6d %6d",
  72                         mm2mils100(x1),
  73                         mm2mils100(y1),
  74                         mm2mils100(x2),
  75                         mm2mils100(y2));
  76                 printf (" %6d %6d %6d",
  77                         mm2mils100(thickness),
  78                         mm2mils100(clearance),
  79                         mm2mils100(mask));
  80                 printf (" \"%s\" \"%s\" \"square\"]\n",
  81                         name, num);
  82         }
  83
  84         public void pad_mm(real center_x,
  85                            real center_y,
  86                            real width,
  87                            real height,
  88                            string name,
  89                            string num)
  90         {
  91                 pad_mm_clear(center_x,
  92                              center_y,
  93                              width,
  94                              height,
  95                              process_clearance,
  96                              name,
  97                              num);
  98         }
  99
 100         public void pin_mm_clear(real x, real y, real drill, real copper, real clearance,
 101                         string name,
 102                         string number)
 103         {
 104                 real thickness = drill + copper * 2;
 105                 real mask = thickness + clearance / 2;
 106                 printf("    Pin[");
 107                 printf(" %6d %6d",
 108                        mm2mils100(x),
 109                        mm2mils100(y));
 110                 printf(" %6d %6d %6d %6d",
 111                        mm2mils100(thickness),
 112                        mm2mils100(clearance),
 113                        mm2mils100(mask),
 114                        mm2mils100(drill));
 115                 printf (" \"%s\" \"%s\"",
 116                         name, number);
 117                 printf (" \"\"]\n");
 118
 119         }
 120
 121         public void pin_mm(real x, real y, real drill, real copper,
 122                         string name,
 123                         string number)
 124         {
 125                 pin_mm_clear(x, y, drill, copper, process_clearance,
 126                              name, number);
 127         }
 128
 129         public void line (real x1, real y1, real x2, real y2)
 130         {
 131                 printf ("    ElementLine[");
 132                 printf (" %6d %6d %6d %6d",
 133                         mm2mils100(x1),
 134                         mm2mils100(y1),
 135                         mm2mils100(x2),
 136                         mm2mils100(y2));
 137                 printf (" 1000]\n");
 138         }
 139
 140         public void rect (real x, real y, real w, real h)
 141         {
 142                 line(x,y,x+w,y);
 143                 line(x+w,y,x+w,y+h);
 144                 line(x+w,y+h,x,y+h);
 145                 line(x,y+h,x,y);
 146         }
 147 }