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

   1 /*
   2  * Copyright © 2018 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 real pad_height = 1.75;
  11 real pad_width = 0.45;
  12 real pad_spacing = 0.65;
  13
  14 if (dim(argv) > 1)
  15         total_pad = string_to_integer(argv[1]);
  16 if (dim(argv) > 2)
  17         center_gap = string_to_real(argv[2]);
  18 if (dim(argv) > 3)
  19         pad_height = string_to_real(argv[3]);
  20 if (dim(argv) > 4)
  21         pad_width = string_to_real(argv[4]);
  22 if (dim(argv) > 5)
  23         pad_spacing = string_to_real(argv[5]);
  24
  25 int num_pad = total_pad / 2;    /* per side */
  26
  27 string name = sprintf ("SSOP-%d", total_pad);
  28
  29 real package_width = (num_pad - 1) * pad_spacing + 1.75;
  30
  31 real package_height = center_gap - 0.15;
  32
  33 real pad_y_off = center_gap / 2 + pad_height / 2;
  34
  35 element_start(name);
  36
  37 real pad_off(int n) {
  38         return pad_spacing * (n - (num_pad - 1) / 2);
  39 }
  40
  41 real corner(int dx, int dy) {
  42         real    x = dx * package_width / 2;
  43         real    y = dy * package_height / 2;
  44         real    len = 0.4;
  45
  46         line(x, y, x - dx * len, y);
  47         line(x, y, x, y - dy * len);
  48 }
  49
  50 corner(-1, -1);
  51 corner(1, -1);
  52 corner(-1, 1);
  53 corner(1, 1);
  54
  55 real dot_off = -.3;
  56
  57 line(-package_width/2 + dot_off, package_height/2 - dot_off,
  58      -package_width/2 + dot_off, package_height/2 - dot_off);
  59
  60 for (int pad = 0; pad < num_pad; pad++) {
  61         /* bottom (1-num_pad) */
  62
  63         pad_mm(pad_off(pad),
  64                pad_y_off,
  65                pad_width,
  66                pad_height,
  67                sprintf("%d", pad + 1),
  68                sprintf("%d", pad + 1));
  69
  70         /* top side (total_pad - num_pad+1) */
  71
  72         pad_mm(pad_off(pad),
  73                -pad_y_off,
  74                pad_width,
  75                pad_height,
  76                sprintf("%d", total_pad - pad),
  77                sprintf("%d", total_pad - pad));
  78
  79 }
  80
  81 element_end();