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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 clearance_mm = 0.6;
  22         public real clearance_mil = 25;
  23
  24         public int mm2mils100(real mm) = floor (mm / 25.4 * 1000 * 100 + 0.5);
  25
  26         public int mils2mils100(real mils) = floor (mils * 100 + 0.5);
  27
  28         public void element_start(string name) {
  29                 printf ("# author: Keith Packard\n");
  30                 printf ("# email: keithp@keithp.com\n");
  31                 printf ("# dist-license: GPL 2\n");
  32                 printf ("# use-license: unlimited\n");
  33                 printf ("Element [\"\" \"%s\" \"\" \"\" 0 0 0 0 0 100 \"\"]\n",
  34                         name);
  35                 printf ("(\n");
  36
  37         }
  38
  39         public void element_end() {
  40                 printf (")\n");
  41         }
  42
  43         public void pad_mm(real center_x,
  44                            real center_y,
  45                            real width,
  46                            real height,
  47                            string name,
  48                            string num)
  49         {
  50                 real    x1 = 0;
  51                 real    y1 = 0;
  52                 real    x2 = 0;
  53                 real    y2 = 0;
  54                 real    thickness = 0;
  55
  56                 if (width > height) {
  57                         thickness = height;
  58                         y1 = center_y;
  59                         x1 = center_x - (width - height) / 2;
  60                         y2 = center_y;
  61                         x2 = center_x + (width - height) / 2;
  62                 } else {
  63                         thickness = width;
  64                         x1 = center_x;
  65                         y1 = center_y - (height - width) / 2;
  66                         x2 = center_x;
  67                         y2 = center_y + (height - width) / 2;
  68                 }
  69
  70                 real mask = thickness + clearance_mm / 2;
  71
  72                 printf ("    Pad[");
  73                 printf (" %6d %6d %6d %6d",
  74                         mm2mils100(x1),
  75                         mm2mils100(y1),
  76                         mm2mils100(x2),
  77                         mm2mils100(y2));
  78                 printf (" %6d %6d %6d",
  79                         mm2mils100(thickness),
  80                         mm2mils100(clearance_mm),
  81                         mm2mils100(mask));
  82                 printf (" \"%s\" \"%s\" \"square\"]\n",
  83                         name, num);
  84         }
  85
  86         public void pin_mm(real x, real y, real drill, real copper,
  87                         string name,
  88                         string number)
  89         {
  90                 real thickness = drill + copper * 2;
  91                 real mask = thickness + clearance_mm / 2;
  92                 printf("    Pin[");
  93                 printf(" %6d %6d",
  94                        mm2mils100(x),
  95                        mm2mils100(y));
  96                 printf(" %6d %6d %6d %6d",
  97                        mm2mils100(thickness),
  98                        mm2mils100(clearance_mm),
  99                        mm2mils100(mask),
 100                        mm2mils100(drill));
 101                 printf (" \"%s\" \"%s\"",
 102                         name, number);
 103                 printf (" \"\"]\n");
 104
 105         }
 106
 107         public void pin_mil(real x, real y, real drill, real copper,
 108                         string name,
 109                         string number)
 110         {
 111                 real thickness = drill + copper * 2;
 112                 real mask = thickness + clearance_mil / 2;
 113                 printf("    Pin[");
 114                 printf(" %6d %6d",
 115                        mils2mils100(x),
 116                        mils2mils100(y));
 117                 printf(" %6d %6d %6d %6d",
 118                        mils2mils100(thickness),
 119                        mils2mils100(clearance_mil),
 120                        mils2mils100(mask),
 121                        mils2mils100(drill));
 122                 printf (" \"%s\" \"%s\"",
 123                         name, number);
 124                 printf (" \"\"]\n");
 125
 126         }
 127
 128         public void line_mm (real x1, real y1, real x2, real y2)
 129         {
 130                 printf ("    ElementLine[");
 131                 printf (" %6d %6d %6d %6d",
 132                         mm2mils100(x1),
 133                         mm2mils100(y1),
 134                         mm2mils100(x2),
 135                         mm2mils100(y2));
 136                 printf (" 1000]\n");
 137         }
 138
 139         public void line_mil (real x1, real y1, real x2, real y2)
 140         {
 141                 printf ("    ElementLine[");
 142                 printf (" %6d %6d %6d %6d",
 143                         mils2mils100(x1),
 144                         mils2mils100(y1),
 145                         mils2mils100(x2),
 146                         mils2mils100(y2));
 147                 printf (" 1000]\n");
 148         }
 149
 150         public void rect_mm (real x, real y, real w, real h)
 151         {
 152                 line_mm(x,y,x+w,y);
 153                 line_mm(x+w,y,x+w,y+h);
 154                 line_mm(x+w,y+h,x,y+h);
 155                 line_mm(x,y+h,x,y);
 156         }
 157
 158         public void rect_mil (real x, real y, real w, real h)
 159         {
 160                 line_mil(x,y,x+w,y);
 161                 line_mil(x+w,y,x+w,y+h);
 162                 line_mil(x+w,y+h,x,y+h);
 163                 line_mil(x,y+h,x,y);
 164         }
 165 }