/*
 * Copyright © 2021 Bdale Garbee <bdale@gag.com>
 * GPL v3
 */

/* intended for use with the onsemi CAT24C32 eeprom and similar chips */

load "footprint.5c"
import Footprint;

real pad_width = 0.68;
real pad_height = 0.30;
real pad_spacing = 0.50;		/* center to center, along the pads */
real pad_center = 3.40-pad_width;	/* center to center, across the part */

real center_width = 1.45;
real center_height = 1.56;

real package_width = 3;
real package_height = 2;

real pad_x_off = pad_center / 2;

real num_pad = 4;	/* per side */

element_start("udfn8");

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 (int pad = 0; pad < num_pad; pad++) {
	/* left side (1-4) */

	pad_mm(-pad_x_off,
	       pad_off(pad),
	       pad_width,
	       pad_height,
	       sprintf("%d", pad + 1),
	       sprintf("%d", pad + 1));
	
	/* right side (5-8) */

	pad_mm(pad_x_off,
	       -pad_off(pad),
	       pad_width,
	       pad_height,
	       sprintf("%d", pad + 5),
	       sprintf("%d", pad + 5));
	
}

/* center pad */
pad_mm(0, 0,
       center_width,
       center_height,
       "9", "9");

element_end();