/*
 * 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 corner_pad_width = 0.50;
real pad_height = 0.30;
real corner_pad_notch = 0.12;
real pad_spacing = 0.50;
real pad_clearance = 12 / 1000 * 25.4;

real pad_x_off = 3.20 / 2;
real pad_y_off = 3.20 / 2;

real package_width = 4;
real package_height = 4;

real num_pad = 7;	/* per side */

element_start("ufqfpn-28");

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++) {
	real pw = pad_width;
	real ph = pad_height;
	real pwa = 0;
	real pha = 0;

	int	nstep = 0;

	if (pad == 0 || pad == num_pad-1)
		nstep = 4;

	for (int s = 0; s <= nstep; s++) {
		if (nstep != 0) {
			real	step = (corner_pad_notch) / nstep;

			pw = corner_pad_width - (nstep - s) * step;
			ph = pad_height - s * step*2/3;

			pwa = pad_width - pw;

			pha = pad_height - ph;
			if (pad != 0)
				pha = -pha;
		}

		/* left (1-7) */
		pad_mm_clear(-pad_x_off - pw / 2 - pwa,
			     pad_off(pad) + pha,
			     pw,
			     ph,
			     pad_clearance,
			     sprintf("%d", pad + 1),
			     sprintf("%d", pad + 1));

		/* bottom (8-14) */

		pad_mm_clear(pad_off(pad) + pha,
			     pad_y_off + pw / 2 + pwa,
			     ph,
			     pw,
			     pad_clearance,
			     sprintf("%d", pad + 8),
			     sprintf("%d", pad + 8));

		/* right side (15-21) */

		pad_mm_clear(pad_x_off + pw / 2 + pwa,
			     -pad_off(pad) - pha,
			     pw,
			     ph,
			     pad_clearance,
			     sprintf("%d", pad + 15),
			     sprintf("%d", pad + 15));

		/* top (22-28) */

		pad_mm_clear(-pad_off(pad) - pha,
			     -pad_y_off - pw / 2 - pwa,
			     ph,
			     pw,
			     pad_clearance,
			     sprintf("%d", pad + 22),
			     sprintf("%d", pad + 22));
	}

}

element_end();