/*
 * Copyright © 2012 Keith Packard <keithp@keithp.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 */

load "footprint.5c"
import Footprint;

real pad_width = 0.55;
real pad_height = 0.30;
real pad_spacing = 0.50;
real pad_clearance = 8 / 1000 * 25.4;	/* 2 mil gap for solder mask */

real pad_x_off = 6.20 / 2;
real pad_y_off = 6.20 / 2;

real center_width = 5.6;
real center_height = 5.6;

real package_width = 7;
real package_height = 7;

real num_pad = 12;	/* per side */

element_start("ufqfpn-48");

real pad_off(int n) {
	return pad_spacing * (n - (num_pad - 1) / 2);
}

real corner(int dx, int dy) {
	real	x = dx * package_width / 2;
	real	y = dy * package_height / 2;
	real	len = 0.4;

	line(x, y, x - dx * len, y);
	line(x, y, x, y - dy * len);
}

corner(-1, -1);
corner(1, -1);
corner(-1, 1);
corner(1, 1);

real dot_off = .3;

line(-package_width/2 + dot_off, -package_height/2 + dot_off,
     -package_width/2 + dot_off, -package_height/2 + dot_off);

for (pad = 0; pad < num_pad; pad++) {
	/* left side (1-12) */

	pad_mm_clear(-pad_x_off - pad_width / 2,
		     pad_off(pad),
		     pad_width,
		     pad_height,
		     pad_clearance,
		     sprintf("%d", pad + 1),
		     sprintf("%d", pad + 1));
	
	/* bottom (13-24) */

	pad_mm_clear(pad_off(pad),
		     pad_y_off + pad_width / 2,
		     pad_height,
		     pad_width,
		     pad_clearance,
		     sprintf("%d", pad + 13),
		     sprintf("%d", pad + 13));
	
	/* right side (25-36) */

	pad_mm_clear(pad_x_off + pad_width / 2,
		     -pad_off(pad),
		     pad_width,
		     pad_height,
		     pad_clearance,
		     sprintf("%d", pad + 25),
		     sprintf("%d", pad + 25));
	
	/* top (37-48) */

	pad_mm_clear(-pad_off(pad),
		     -pad_y_off - pad_width / 2,
		     pad_height,
		     pad_width,
		     pad_clearance,
		     sprintf("%d", pad + 37),
		     sprintf("%d", pad + 37));
	
}

int pad_blocks = 3;

real block_width = center_width / pad_blocks;
real block_height = center_height / pad_blocks;

real block_x(int x) = (x - (pad_blocks - 1)/2) * block_width;
real block_y(int y) = (y - (pad_blocks - 1)/2) * block_height;

bool via_block(int x, int y) {
	return (x & 1) == 0 && (y & 1) == 0;
}

real via_hole = 15/1000 * 25.4;		/* 15 mil drill */
real via_copper = 3.5/1000 * 25.4; 	/* 7 mil anulus */

for (int pad_y = 0; pad_y < pad_blocks; pad_y++) {
	for (int pad_x = 0; pad_x < pad_blocks; pad_x++)
		if (via_block(pad_x, pad_y)) {
			pin_mm_clear_mask(block_x(pad_x), block_y(pad_y),
					  via_hole, via_copper * 2, pad_clearance, 0,
					  "GND", "GND");
			pad_mm_clear_mask_options(block_x(pad_x), block_y(pad_y),
						  block_width, block_height,
						  pad_clearance, 0,
						  "GND", "GND","nopaste");
		} else {
			/* full square of metal */
			pad_mm_clear_options(block_x(pad_x), block_y(pad_y),
					     block_width, block_height,
					     0,
					     "GND", "GND","nopaste");
			/* 1/4 full of solder paste */
			pad_mm_clear_options(block_x(pad_x), block_y(pad_y),
					     block_width/2, block_height/2,
					     0,
					     "GND", "GND","");
		}
}

element_end();