git.gag.com Git - hw/altusmetrum/blob - packages/ssop.5c

   1 /*
   2  * Copyright © 2017 Bdale Garbee <bdale@gag.com>, GPLv3+
   3  */
   4
   5 load "footprint.5c"
   6 import Footprint;
   7
   8 int total_pad = 28;
   9 real center_gap = 7.20 - 1.75;
  10
  11 if (dim(argv) > 1)
  12         total_pad = string_to_integer(argv[1]);
  13 if (dim(argv) > 2)
  14         center_gap = string_to_real(argv[2]);
  15
  16 real pad_width = 0.45;
  17
  18 real pad_height = 1.75;
  19
  20 real pad_spacing = 0.65;
  21
  22 int num_pad = total_pad / 2;    /* per side */
  23
  24 string name = sprintf ("SSOP-%d", total_pad);
  25
  26 real package_width = (num_pad - 1) * pad_spacing + 1.75;
  27
  28 real package_height = center_gap - 0.15;
  29
  30 real pad_y_off = center_gap / 2 + pad_height / 2;
  31
  32 element_start(name);
  33
  34 real pad_off(int n) {
  35         return pad_spacing * (n - (num_pad - 1) / 2);
  36 }
  37
  38 real corner(int dx, int dy) {
  39         real    x = dx * package_width / 2;
  40         real    y = dy * package_height / 2;
  41         real    len = 0.4;
  42
  43         line(x, y, x - dx * len, y);
  44         line(x, y, x, y - dy * len);
  45 }
  46
  47 corner(-1, -1);
  48 corner(1, -1);
  49 corner(-1, 1);
  50 corner(1, 1);
  51
  52 real dot_off = -.3;
  53
  54 line(-package_width/2 + dot_off, package_height/2 - dot_off,
  55      -package_width/2 + dot_off, package_height/2 - dot_off);
  56
  57 for (int pad = 0; pad < num_pad; pad++) {
  58         /* bottom (1-num_pad) */
  59
  60         pad_mm(pad_off(pad),
  61                pad_y_off,
  62                pad_width,
  63                pad_height,
  64                sprintf("%d", pad + 1),
  65                sprintf("%d", pad + 1));
  66
  67         /* top side (total_pad - num_pad+1) */
  68
  69         pad_mm(pad_off(pad),
  70                -pad_y_off,
  71                pad_width,
  72                pad_height,
  73                sprintf("%d", total_pad - pad),
  74                sprintf("%d", total_pad - pad));
  75
  76 }
  77
  78 element_end();