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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 real mils1002mm(real mils100) = mils100 * 25.4 / 100 / 1000;
  26
  27         public int line_thickness = 1000;
  28
  29         public void element_start(string name) {
  30                 printf ("# author: Keith Packard\n");
  31                 printf ("# email: keithp@keithp.com\n");
  32                 printf ("# dist-license: GPL 2\n");
  33                 printf ("# use-license: unlimited\n");
  34                 printf ("Element [\"\" \"%s\" \"\" \"\" 0 0 0 0 0 100 \"\"]\n",
  35                         name);
  36                 printf ("(\n");
  37
  38         }
  39
  40         public void element_end() {
  41                 printf (")\n");
  42         }
  43
  44         public void pad_mm_clear_mask_options(real center_x,
  45                                               real center_y,
  46                                               real width,
  47                                               real height,
  48                                               real clearance,
  49                                               real mask,
  50                                               string name,
  51                                               string num,
  52                                               string options)
  53         {
  54                 real    x1 = 0;
  55                 real    y1 = 0;
  56                 real    x2 = 0;
  57                 real    y2 = 0;
  58                 real    thickness = 0;
  59
  60                 if (width > height) {
  61                         thickness = height;
  62                         y1 = center_y;
  63                         x1 = center_x - (width - height) / 2;
  64                         y2 = center_y;
  65                         x2 = center_x + (width - height) / 2;
  66                 } else {
  67                         thickness = width;
  68                         x1 = center_x;
  69                         y1 = center_y - (height - width) / 2;
  70                         x2 = center_x;
  71                         y2 = center_y + (height - width) / 2;
  72                 }
  73
  74
  75                 printf ("    Pad[");
  76                 printf (" %6d %6d %6d %6d",
  77                         mm2mils100(x1),
  78                         mm2mils100(y1),
  79                         mm2mils100(x2),
  80                         mm2mils100(y2));
  81                 printf (" %6d %6d %6d",
  82                         mm2mils100(thickness),
  83                         mm2mils100(clearance),
  84                         mm2mils100(mask));
  85                 printf (" \"%s\" \"%s\" \"square%s%s\"]\n",
  86                         name, num, options == "" ? "" : ",", options);
  87         }
  88
  89         public void pad_mm_clear_options(real center_x,
  90                                          real center_y,
  91                                          real width,
  92                                          real height,
  93                                          real clearance,
  94                                          string name,
  95                                          string num,
  96                                          string options)
  97         {
  98                 real    x1 = 0;
  99                 real    y1 = 0;
 100                 real    x2 = 0;
 101                 real    y2 = 0;
 102                 real    thickness = 0;
 103
 104                 if (width > height) {
 105                         thickness = height;
 106                         y1 = center_y;
 107                         x1 = center_x - (width - height) / 2;
 108                         y2 = center_y;
 109                         x2 = center_x + (width - height) / 2;
 110                 } else {
 111                         thickness = width;
 112                         x1 = center_x;
 113                         y1 = center_y - (height - width) / 2;
 114                         x2 = center_x;
 115                         y2 = center_y + (height - width) / 2;
 116                 }
 117
 118                 real mask = thickness + clearance / 2;
 119
 120                 printf ("    Pad[");
 121                 printf (" %6d %6d %6d %6d",
 122                         mm2mils100(x1),
 123                         mm2mils100(y1),
 124                         mm2mils100(x2),
 125                         mm2mils100(y2));
 126                 printf (" %6d %6d %6d",
 127                         mm2mils100(thickness),
 128                         mm2mils100(clearance),
 129                         mm2mils100(mask));
 130                 printf (" \"%s\" \"%s\" \"square%s%s\"]\n",
 131                         name, num, options == "" ? "" : ",", options);
 132         }
 133
 134         public void pad_mm_clear(real center_x,
 135                                  real center_y,
 136                                  real width,
 137                                  real height,
 138                                  real clearance,
 139                                  string name,
 140                                  string num)
 141         {
 142                 pad_mm_clear_options(center_x,
 143                                      center_y,
 144                                      width,
 145                                      height,
 146                                      clearance,
 147                                      name,
 148                                      num,
 149                                      "");
 150         }
 151
 152         public void pad_mm(real center_x,
 153                            real center_y,
 154                            real width,
 155                            real height,
 156                            string name,
 157                            string num)
 158         {
 159                 pad_mm_clear(center_x,
 160                              center_y,
 161                              width,
 162                              height,
 163                              process_clearance,
 164                              name,
 165                              num);
 166         }
 167
 168         public void pin_mm_clear(real x, real y, real drill, real copper, real clearance,
 169                         string name,
 170                         string number)
 171         {
 172                 real thickness = drill + copper * 2;
 173                 real mask = thickness + clearance / 2;
 174                 printf("    Pin[");
 175                 printf(" %6d %6d",
 176                        mm2mils100(x),
 177                        mm2mils100(y));
 178                 printf(" %6d %6d %6d %6d",
 179                        mm2mils100(thickness),
 180                        mm2mils100(clearance),
 181                        mm2mils100(mask),
 182                        mm2mils100(drill));
 183                 printf (" \"%s\" \"%s\"",
 184                         name, number);
 185                 printf (" \"\"]\n");
 186
 187         }
 188
 189         public void pin_mm_clear_mask(real x, real y,
 190                                       real drill, real copper, real clearance, real mask,
 191                                       string name, string number)
 192         {
 193                 real thickness = drill + copper * 2;
 194                 printf("    Pin[");
 195                 printf(" %6d %6d",
 196                        mm2mils100(x),
 197                        mm2mils100(y));
 198                 printf(" %6d %6d %6d %6d",
 199                        mm2mils100(thickness),
 200                        mm2mils100(clearance),
 201                        mm2mils100(mask),
 202                        mm2mils100(drill));
 203                 printf (" \"%s\" \"%s\"",
 204                         name, number);
 205                 printf (" \"\"]\n");
 206
 207         }
 208
 209         public void pin_mm(real x, real y, real drill, real copper,
 210                         string name,
 211                         string number)
 212         {
 213                 pin_mm_clear(x, y, drill, copper, process_clearance,
 214                              name, number);
 215         }
 216
 217         public void line (real x1, real y1, real x2, real y2)
 218         {
 219                 printf ("    ElementLine[");
 220                 printf (" %6d %6d %6d %6d",
 221                         mm2mils100(x1),
 222                         mm2mils100(y1),
 223                         mm2mils100(x2),
 224                         mm2mils100(y2));
 225                 printf (" %d]\n", line_thickness);
 226         }
 227
 228         public void rect (real x, real y, real w, real h)
 229         {
 230                 line(x,y,x+w,y);
 231                 line(x+w,y,x+w,y+h);
 232                 line(x+w,y+h,x,y+h);
 233                 line(x,y+h,x,y);
 234         }
 235 }