From 6488916fe431c9ea33236523f71f2d8c140591f9 Mon Sep 17 00:00:00 2001
From: Bdale Garbee <bdale@gag.com>
Date: Mon, 2 Nov 2020 01:04:19 -0700
Subject: [PATCH] package for MCP9808 temperature sensor

---
 packages/Makefile     |  1 +
 packages/dfn-2x3-8.5c | 78 +++++++++++++++++++++++++++++++++++++++++++
 pcb-rnd.mk            |  8 ++++-
 3 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 packages/dfn-2x3-8.5c

diff --git a/packages/Makefile b/packages/Makefile
index ac01c52..91162ad 100644
--- a/packages/Makefile
+++ b/packages/Makefile
@@ -90,6 +90,7 @@ FOOTPRINTS= \
 	PowerPAD32.fp \
 	usb_onboard.fp \
 	u-pdfn-8.fp \
+	dfn-2x3-8.fp \
 	ufqfpn28.fp \
 	ufqfpn24.fp \
 	ufqfpn20.fp \
diff --git a/packages/dfn-2x3-8.5c b/packages/dfn-2x3-8.5c
new file mode 100644
index 0000000..c78c5db
--- /dev/null
+++ b/packages/dfn-2x3-8.5c
@@ -0,0 +1,78 @@
+/*
+ * Copyright © 2020 Bdale Garbee <bdale@gag.com>
+ * GPL v3
+ */
+
+/* intended for use with the MCP9808 temperature sensor and similar chips */
+
+load "footprint.5c"
+import Footprint;
+
+real pad_width = 0.75;
+real pad_height = 0.30;
+real pad_spacing = 0.50;	/* center to center, along the pads */
+real pad_center = 2.9;		/* center to center, across the part */
+
+real center_width = 1.75;
+real center_height = 1.45;
+
+real package_width = 3;
+real package_height = 2;
+
+real pad_x_off = pad_center / 2;
+
+real num_pad = 4;	/* per side */
+
+element_start("u-pdfn-8");
+
+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();
diff --git a/pcb-rnd.mk b/pcb-rnd.mk
index d630ec1..a574b80 100644
--- a/pcb-rnd.mk
+++ b/pcb-rnd.mk
@@ -1,7 +1,7 @@
 AM=../altusmetrum
 SCHEME=$(AM)/scheme
 
-.SUFFIXES: .lht .sch .ps .pdf .tdx
+.SUFFIXES: .lht .sch .ps .pdf .tdx .scad .stl
 
 # need to have PROJECT defined
 ifndef PROJECT
@@ -101,6 +101,12 @@ stencilsunlimited:	$(BOTTOMCOPPER) $(PROJECT).toppaste.gbr $(OUTLINE)
 stencil:	$(PROJECT).lht
 	pcb-rnd -x cam gerber:stencils --outfile out/$(PROJECT) $(PROJECT).lht
 
+$(PROJECT).scad:	$(PROJECT).lht
+	pcb-rnd -x openscad $(PROJECT).lht
+
+$(PROJECT).stl:	$(PROJECT).scad
+	openscad --o $(PROJECT).stl $(PROJECT).scad
+
 clean:
 	rm -f *.bom *.drc *.log *~ $(PROJECT).ps *.gbr *.cnc *bak* *- *.zip *.tdx *.backup
 	rm -f *.net *.xy *.cmd *.png partslist partslist.csv *.ger *.xln PCB*save
-- 
2.47.2