From 87588bed0ed72bf44e01333d19915cbcebe6fb5a Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@openmoko.org>
Date: Thu, 12 Aug 2010 09:39:13 -0300
Subject: [PATCH] Added QFN28 and QFN32 footprints for MCU and TXRX.

---
 BOOKSHELF       |   8 ++++
 modules/INFO    |  22 +++++++++++
 modules/qfn.fpd | 101 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 131 insertions(+)
 create mode 100644 modules/qfn.fpd

diff --git a/BOOKSHELF b/BOOKSHELF
index d7b2601..4e48115 100644
--- a/BOOKSHELF
+++ b/BOOKSHELF
@@ -39,3 +39,11 @@ D: http://jae-connector.com/en/pdf/SJ037525.pdf
 # Footprints of standard rectangular passive components
 N: stdpass
 D: http://www.vishay.com/docs/20035/dcrcwe3.pdf
+
+# NXP SOT617-3 package (QFN32 with a 3.6 x 3.6 mm center pad)
+N: sot617-3-lp
+A: nxp-qfn32-lp
+D: http://www.nxp.com/documents/outline_drawing/sot617-3_po.pdf
+
+N: atmel-qfn
+D: http://www.atmel.com/dyn/resources/prod_documents/doc8583.pdf
diff --git a/modules/INFO b/modules/INFO
index 6e6d954..17ae691 100644
--- a/modules/INFO
+++ b/modules/INFO
@@ -14,3 +14,25 @@ F: mini_usb_b
 
 # Standard rectangular passive components
 F: stdpass
+
+# "Generic" simple QFN
+F: qfn
+#
+# The information for these packages comes from various sources:
+#
+# - the C8051F326 data sheet, for the QFN28 footprint (N: mcu)
+# - the AT86F326 data sheet, for the QFN32 package dimensions (N: txrx)
+# - Atmel's general recommendations for QFN land patterns (N: atmel-qfn)
+# - NXP's SOT617-1 and SOT617-3, for package and land pattern:
+#   http://www.nxp.com/package/SOT617-1.html
+#   http://www.nxp.com/package/SOT617-3.html
+#
+# Known bugs:
+#
+# - we should distribute the solder paste in an array of small
+#   squares instead of just covering the whole center pad.
+# - really ought to merge all the various QFN definitions (we have more
+#   over at gta02-core) into a single QFN file with a big mean table of
+#   everything
+#
+N: sot617-3-lp
diff --git a/modules/qfn.fpd b/modules/qfn.fpd
new file mode 100644
index 0000000..afc075f
--- /dev/null
+++ b/modules/qfn.fpd
@@ -0,0 +1,101 @@
+/* MACHINE-GENERATED ! */
+
+frame center {
+	set pin = pins+1
+
+	set x = D2+0.1mm
+
+	set y = E2+0.1mm
+
+	__0: vec @(x/2, y/2)
+	__1: vec @(-x/2, -y/2)
+	pad "$pin" . __0
+}
+
+frame pad {
+	set px = (dx*X1+dy*Y1)/2
+
+	set py = (dy*X1+dx*Y1)/2
+
+	set pin = side*pins/4+i+1
+
+	__0: vec @(px, py)
+	__1: vec @(-px, -py)
+	pad "$pin" __0 .
+}
+
+frame side {
+	set pos = i-(pins/4-1)/2
+
+	loop i = 0, pins/4-1
+
+	__0: vec @(E*pos*dx, E*pos*dy)
+	frame pad .
+}
+
+frame pads {
+	table
+	    { side, dx, dy }
+	    { 0, 0, -1 }
+	    { 1, 1, 0 }
+	    { 2, 0, 1 }
+	    { 3, -1, 0 }
+
+	__0: vec @(dy*C1/2, -dx*C2/2)
+	frame side .
+}
+
+frame index {
+}
+
+frame outline {
+	table
+	    { index, dx, _, dy }
+	    { 1, -1, 0, 0 }
+	    { 0, 0, 0, -1 }
+	    { 0, 1, 0, 0 }
+	    { 0, 0, 0, 1 }
+
+	set mx = dx*C1/2
+
+	set my = dy*C2/2
+
+	set cx = mx+my
+
+	set cy = my-mx
+
+	set ax = -Y1/2*dx
+
+	set ay = -Y1/2*dy
+
+	set bx = -Y1/2*dy
+
+	set by = Y1/2*dx
+
+	__0: vec @(cx, cy)
+	w: vec .(ax, ay)
+	line __0 . w
+	__2: vec __0(bx, by)
+	line __0 . w
+	__1: vec .(index*(ax-bx), index*(ay-by))
+	line __2 . w
+}
+
+package "QFN$pins"
+unit mm
+
+table
+    { pins, X1, Y1, E, C1, C2, D2, E2 }
+    { 28, 0.25mm, 0.9mm, 0.5mm, 4.8mm, 4.8mm, 3.15mm, 3.15mm }
+    { 32, 0.29mm, 0.9mm, 0.5mm, 5.1mm, 5.1mm, 3.3mm, 3.3mm }
+
+set X2 = X1+(pins/4-1)*E
+
+set Y2 = X2
+
+set w = 5mil
+
+__0: vec @(D2/2, E2/2)
+frame pads @
+frame center @
+frame outline @