From ccd17715871444b41d1cc6112d3359134ac4b9fc Mon Sep 17 00:00:00 2001
From: Bdale Garbee <bdale@gag.com>
Date: Sun, 6 Aug 2017 18:26:29 -0700
Subject: [PATCH] add ssop generator and make ssop-28 for CAN chip used by
 AMSAT LTI

---
 packages/Makefile |  4 +++
 packages/ssop.5c  | 78 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 82 insertions(+)
 create mode 100644 packages/ssop.5c

diff --git a/packages/Makefile b/packages/Makefile
index e557c83..c583e31 100644
--- a/packages/Makefile
+++ b/packages/Makefile
@@ -11,6 +11,7 @@ DIRS= \
 	te-connectivity 
 
 SOIC= \
+	ssop-28.fp \
 	soic-16.fp \
 	soic-24.fp
 
@@ -139,6 +140,9 @@ clean: $(CLEANDIRS)
 .gitignore: Makefile
 	for i in $@ $(FOOTPRINTS); do echo $$i; done > $@
 
+ssop-28.fp: ssop.5c
+	nickle ssop.5c 28 > $@
+
 soic-16.fp: soic.5c
 	nickle soic.5c 16 > $@
 
diff --git a/packages/ssop.5c b/packages/ssop.5c
new file mode 100644
index 0000000..6ad0559
--- /dev/null
+++ b/packages/ssop.5c
@@ -0,0 +1,78 @@
+/*
+ * Copyright © 2017 Bdale Garbee <bdale@gag.com>, GPLv3+
+ */
+
+load "footprint.5c"
+import Footprint;
+
+int total_pad = 28;
+real center_gap = 7.20 - 1.75;
+
+if (dim(argv) > 1)
+	total_pad = string_to_integer(argv[1]);
+if (dim(argv) > 2)
+	center_gap = string_to_real(argv[2]);
+
+real pad_width = 0.45;
+
+real pad_height = 1.75;
+
+real pad_spacing = 0.65;
+
+int num_pad = total_pad / 2;	/* per side */
+
+string name = sprintf ("SSOP-%d", total_pad);
+
+real package_width = (num_pad - 1) * pad_spacing + 1.75;
+
+real package_height = center_gap - 0.15;
+
+real pad_y_off = center_gap / 2 + pad_height / 2;
+
+element_start(name);
+
+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++) {
+	/* bottom (1-num_pad) */
+
+	pad_mm(pad_off(pad),
+	       pad_y_off,
+	       pad_width,
+	       pad_height,
+	       sprintf("%d", pad + 1),
+	       sprintf("%d", pad + 1));
+	
+	/* top side (total_pad - num_pad+1) */
+
+	pad_mm(pad_off(pad),
+	       -pad_y_off,
+	       pad_width,
+	       pad_height,
+	       sprintf("%d", total_pad - pad),
+	       sprintf("%d", total_pad - pad));
+	
+}
+
+element_end();
-- 
2.39.5