git.gag.com Git - hw/altusmetrum/blob - packages/qfn16-3x3.5c

   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 load "footprint.5c"
  19 import Footprint;
  20
  21 real pad_width = 0.55;
  22 real metal_width = 0.32;
  23 real metal_height = 0.24;
  24 real pad_height = 0.30;
  25 real pad_spacing = 0.50;
  26 real pad_clearance = 12 / 1000 * 25.4;
  27
  28 real center_width = 2;
  29 real center_height = 2;
  30
  31 real package_width = 3;
  32 real package_height = 3;
  33
  34 real pad_x_off = package_width / 2 - metal_width;
  35 real pad_y_off = package_height / 2 - metal_width;
  36
  37 real num_pad = 4;       /* per side */
  38
  39 element_start("qfn16-3x3");
  40
  41 real pad_off(int n) {
  42         return pad_spacing * (n - (num_pad - 1) / 2);
  43 }
  44
  45 real corner(int dx, int dy) {
  46         real    x = dx * package_width / 2;
  47         real    y = dy * package_height / 2;
  48         real    len = 0.4;
  49
  50         line(x, y, x - dx * len, y);
  51         line(x, y, x, y - dy * len);
  52 }
  53
  54 corner(-1, -1);
  55 corner(1, -1);
  56 corner(-1, 1);
  57 corner(1, 1);
  58
  59 real dot_off = .3;
  60
  61 line(-package_width/2 + dot_off, -package_height/2 + dot_off,
  62      -package_width/2 + dot_off, -package_height/2 + dot_off);
  63
  64 for (pad = 0; pad < num_pad; pad++) {
  65         /* left side (1-4) */
  66
  67         pad_mm_clear(-pad_x_off - pad_width / 2,
  68                      pad_off(pad),
  69                      pad_width,
  70                      pad_height,
  71                      pad_clearance,
  72                      sprintf("%d", pad + 1),
  73                      sprintf("%d", pad + 1));
  74
  75         /* bottom (5-8) */
  76
  77         pad_mm_clear(pad_off(pad),
  78                      pad_y_off + pad_width / 2,
  79                      pad_height,
  80                      pad_width,
  81                      pad_clearance,
  82                      sprintf("%d", pad + 5),
  83                      sprintf("%d", pad + 5));
  84
  85         /* right side (9-12) */
  86
  87         pad_mm_clear(pad_x_off + pad_width / 2,
  88                      -pad_off(pad),
  89                      pad_width,
  90                      pad_height,
  91                      pad_clearance,
  92                      sprintf("%d", pad + 9),
  93                      sprintf("%d", pad + 9));
  94
  95         /* top (13-16) */
  96
  97         pad_mm_clear(-pad_off(pad),
  98                      -pad_y_off - pad_width / 2,
  99                      pad_height,
 100                      pad_width,
 101                      pad_clearance,
 102                      sprintf("%d", pad + 13),
 103                      sprintf("%d", pad + 13));
 104
 105 }
 106
 107 int pad_blocks = 3;
 108
 109 real block_width = center_width / pad_blocks;
 110 real block_height = center_height / pad_blocks;
 111
 112 real block_x(int x) = (x - (pad_blocks - 1)/2) * block_width;
 113 real block_y(int y) = (y - (pad_blocks - 1)/2) * block_height;
 114
 115 bool via_block(int x, int y) {
 116         return (x & 1) == 0 && (y & 1) == 0;
 117 }
 118
 119 real via_hole = 13/1000 * 25.4;         /* 13 mil drill */
 120 real via_copper = 7/1000 * 25.4;        /* 5.6 mil anulus */
 121
 122 for (int pad_y = 0; pad_y < pad_blocks; pad_y++) {
 123         for (int pad_x = 0; pad_x < pad_blocks; pad_x++)
 124                 if (via_block(pad_x, pad_y)) {
 125                         pin_mm_clear_mask(block_x(pad_x), block_y(pad_y),
 126                                           via_hole, via_hole + 2 * via_copper, pad_clearance, 0,
 127                                           "GND", "GND");
 128                         pad_mm_clear_mask_options(block_x(pad_x), block_y(pad_y),
 129                                                   block_width, block_height,
 130                                                   pad_clearance, 0,
 131                                                   "GND", "GND","square,nopaste");
 132                 } else {
 133                         /* full square of metal */
 134                         pad_mm_clear_options(block_x(pad_x), block_y(pad_y),
 135                                              block_width, block_height,
 136                                              0,
 137                                              "GND", "GND","square,nopaste");
 138                         /* 1/4 full of solder paste */
 139                         pad_mm_clear_options(block_x(pad_x), block_y(pad_y),
 140                                              block_width/2, block_height/2,
 141                                              0,
 142                                              "GND", "GND","square");
 143                 }
 144 }
 145
 146 element_end();