From: Keith Packard <keithp@keithp.com>
Date: Sun, 3 Nov 2013 00:18:54 +0000 (-0700)
Subject: Add TI s-pwson-n8 footprint (for drv8837)
X-Git-Tag: telelco-v3.0~822
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=beda790974a151482bba17097fd14a3e47db2b43;p=hw%2Faltusmetrum

Add TI s-pwson-n8 footprint (for drv8837)

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/packages/footprint.5c b/packages/footprint.5c
index 7e45489..e6af81a 100644
--- a/packages/footprint.5c
+++ b/packages/footprint.5c
@@ -164,33 +164,50 @@ namespace Footprint {
 			     name,
 			     num);
 	}
+	public void pad_mm_options(real center_x,
+				   real center_y,
+				   real width,
+				   real height,
+				   string name,
+				   string num,
+				   string options)
+	{
+		pad_mm_clear_options(center_x,
+				     center_y,
+				     width,
+				     height,
+				     process_clearance,
+				     name,
+				     num,
+				     options);
+	}
 
-public void pad_mm_arbitrary(   real x1,
-                                real y1,
-                                real x2,
-                                real y2,
-                                real thickness,
-                                string name,
-                                string num,
-                                string options)
-{
-        real clearance = process_clearance;
+	public void pad_mm_arbitrary(   real x1,
+					real y1,
+					real x2,
+					real y2,
+					real thickness,
+					string name,
+					string num,
+					string options)
+	{
+		real clearance = process_clearance;
 
-        real mask = thickness + clearance / 2;
+		real mask = thickness + clearance / 2;
 
-        printf ("    Pad[");
-                printf (" %6d %6d %6d %6d",
-                        mm2mils100(x1),
-                        mm2mils100(y1),
-                        mm2mils100(x2),
-                        mm2mils100(y2));
-                printf (" %6d %6d %6d",
-                        mm2mils100(thickness),
-                        mm2mils100(clearance),
-                        mm2mils100(mask));
-                printf (" \"%s\" \"%s\" \"%s\"]\n",
-                        name, num, options);
-}
+		printf ("    Pad[");
+		printf (" %6d %6d %6d %6d",
+			mm2mils100(x1),
+			mm2mils100(y1),
+			mm2mils100(x2),
+			mm2mils100(y2));
+		printf (" %6d %6d %6d",
+			mm2mils100(thickness),
+			mm2mils100(clearance),
+			mm2mils100(mask));
+		printf (" \"%s\" \"%s\" \"%s\"]\n",
+			name, num, options);
+	}
 
 	public void pin_mm_clear(real x, real y, real drill, real copper, real clearance,
 			string name,
diff --git a/packages/s-pwson-n8.5c b/packages/s-pwson-n8.5c
new file mode 100644
index 0000000..57952b9
--- /dev/null
+++ b/packages/s-pwson-n8.5c
@@ -0,0 +1,79 @@
+/*
+ * 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;
+
+Footprint::process_clearance = 0.07;
+
+real pad_expose = 0.1;
+real pad_width = 0.28;
+real pad_height = 0.50;
+real pad_x_spacing = 0.50;
+real pad_y_gap = 1.4;
+real pad_y_spacing = pad_y_gap + pad_height;
+
+real package_width = 2;
+real package_height = 2;
+
+real center_width = 1.6;
+real center_height = 0.9;
+
+
+real pad_x_off = package_width / 2 - (pad_width - pad_expose) / 2 + pad_expose;
+
+real num_pad = 4;	/* per side */
+
+element_start("s-pwson-n8");
+
+/* full center pad */
+pad_mm_options(0, 0, center_width, center_height, "9", "9", "square,nopaste");
+
+/* 63% paste coverage */
+real paste_coverage = 0.63;
+real paste_coverage_scale = sqrt(paste_coverage);
+pad_mm_options(0, 0, center_width * paste_coverage_scale,
+	       center_height * paste_coverage_scale, "9", "9", "square");
+
+real pad_y_off = pad_y_spacing / 2;
+
+real pad_off(int n) {
+	return pad_x_spacing * (n - (num_pad - 1) / 2);
+}
+
+for (int pad = 0; pad < num_pad; pad++) {
+	/* bottom side (1-4) */
+
+	pad_mm(pad_off(pad),
+	       -pad_y_off,
+	       pad_width,
+	       pad_height,
+	       sprintf("%d", pad + 1),
+	       sprintf("%d", pad + 1));
+	
+	/* top side (8-5) */
+
+	pad_mm(pad_off(pad),
+	       pad_y_off,
+	       pad_width,
+	       pad_height,
+	       sprintf("%d", 8 - pad),
+	       sprintf("%d", 8 - pad));
+	
+}
+
+element_end();