WIP: SOIC Package and Generator

scripts/generate_soic.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+
+"""
+Generates pin header in KiCAD style from a single pin model.
+Models are generated in current working directory.
+"""
+import os
+from lxml import etree
+from copy import deepcopy
+import argparse
+
+corner_rad = 0.3
+
+# TODO: width settings does nothing right now
+soic_settings = [
+  {'pins': 8, 'width': 3.9, 'height': 4.9},
+  {'pins': 8, 'width': 5.3, 'height': 5.3},
+  {'pins': 8, 'width': 5.23, 'height': 5.23},
+  {'pins': 14, 'width': 3.9, 'height': 8.7},
+  {'pins': 16, 'width': 3.9, 'height': 9.9},
+]
+
+if __name__ == "__main__":
+    for soic in soic_settings:
+        # Get the document's items
+        document = etree.parse('base/SOIC.svg')
+        root = document.getroot()
+
+        # Delete all inkscape grids
+        p = root.find("{http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd}namedview")
+        for c in p.findall("{http://www.inkscape.org/namespaces/inkscape}grid"):
+            p.remove(c)
+
+        origin = root.find(".//*[@id='origin']")
+        body = root.find(".//*[@id='body_path']")
+        first_pin_dot = root.find(".//*[@id='first_pin_dot']")
+        # Remove the origin, body, and first dot pin to add later
+        # This is to place them above the pins
+        root.remove(origin)
+        root.remove(body)
+        root.remove(first_pin_dot)
+        sh = soic['height']
+        sw = soic['width']
+        # Copy the pin and use that to make other pins
+        pin_copy = root.find(".//*[@id='pin']")
+        root.remove(pin_copy)
+        for r in [-1, 1]:
+            for c in range(1, soic['pins']//2+1):
+                el = deepcopy(pin_copy)
+                del el.attrib["id"]
+                el.attrib["y"] = "{}".format((soic['pins']/4-c)* 1.27 - 0.2 + 1.27/2)
+                el.attrib["x"] = "{}".format(r*(sw/2 + 0.5) - 0.5)
+                root.append(el)
+        # Change the main body's lower dimension
+        body.attrib["d"] = "m {},{} h {} c 0,0 0.3,0 0.3,0.3 l 0,{} c 0,0.3 -0.3,0.3 -0.3,0.3 h {} c 0,0 -0.3,0 -0.3,-0.3 l 0,{} c 0,-0.3 0.3,-0.3 0.3,-0.3 z".format(corner_rad-sw/2, -sh/2, sw-corner_rad*2, sh-corner_rad*2, -(sw-corner_rad*2), -(sh-corner_rad*2))
+        # Move the dot
+        first_pin_dot.attrib["cy"] = str(-((sh/2) - 0.8))
+        first_pin_dot.attrib["cx"] = str(-((sw/2) - 0.8))
+        # Add back the body, dot, and origin to the SVG file to lay them on top of the pins
+        root.append(body)
+        root.append(first_pin_dot)
+        root.append(origin)
+        # Export the document
+        sn = "export/SOIC-{}_{:.2f}x{:.2f}mm_P1.27mm.svg".format(soic['pins'], sw, sh)
+        if not os.path.isdir("export"):
+          os.mkdir("export")
+        document.write(sn)
+        os.system(f"inkscape {sn} -D -o {sn} ;")