From 3aa8b1dd6e0f504ef83da99f8c9cdb2532f948f5 Mon Sep 17 00:00:00 2001
From: Rob Austein <sra@hactrn.net>
Date: Sun, 13 Sep 2020 23:10:21 +0000
Subject: Initial conversion pass

---
 ...GitRepositories%2Fuser%2Fft%2Falpha_to_kicad.md | 72 ++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 raw-wiki-dump/GitRepositories%2Fuser%2Fft%2Falpha_to_kicad.md

(limited to 'raw-wiki-dump/GitRepositories%2Fuser%2Fft%2Falpha_to_kicad.md')

diff --git a/raw-wiki-dump/GitRepositories%2Fuser%2Fft%2Falpha_to_kicad.md b/raw-wiki-dump/GitRepositories%2Fuser%2Fft%2Falpha_to_kicad.md
new file mode 100644
index 0000000..df254d5
--- /dev/null
+++ b/raw-wiki-dump/GitRepositories%2Fuser%2Fft%2Falpha_to_kicad.md
@@ -0,0 +1,72 @@
+```
+#!htmlcomment
+
+This page is maintained automatically by a script.  Don't modify this page by hand,
+your changes will just be overwritten the next time the script runs.  Talk to your
+Friendly Neighborhood Repository Maintainer if you need to change something here.
+
+```
+
+```
+#!html
+<p>Work-in-progress repository with output of altium2kicad conversion
+of the Cryptech Alpha rev03 board.</p>
+
+<p>The conversion was done using 'convert.sh', with the Altium Designer
+project files from</p>
+
+<p>https://wiki.cryptech.is/browser/hardware/cad/rev03</p>
+
+<p>and the altium2kicad project from</p>
+
+<p>https://github.com/thesourcerer8/altium2kicad</p>
+
+<h2>Current status</h2>
+
+<p>NOTE: The latest stable KiCAD version as of this writing is 4.0.7 - it does
+NOT include necessary support for stitching vias. Install KiCAD nightly build
+to work with the Cryptech Alpha PCB.</p>
+
+<p>The schematics are mostly converted. A few components do not connect with their
+nets (e.g. C9 and C10 on sheet rev02_01), but maybe a manual overhaul will be
+needed anyways at the end of conversion. A bigger issue is that no components
+get footprints associated with them in the schema, so generating a new netlist
+won't work at all. The footprints exists in some form in the PCB, so we only
+need to figure out how to reference them properly in the schema.</p>
+
+<p>All the copper layers convert reasonably well. The challenges are mostly
+around filled polygons on the various layers. A python script (fix-pcb.py)
+modifies parameters to get a fairly close result.</p>
+
+<p>I'm currently looking into ensuring the drill hole sizes are right, and the
+non-copper layers have been largely ignored this far.</p>
+
+<h2>Issues</h2>
+
+<p>Two layers (Altium Gerber files CrypTech.G1 and CrypTech.G2) have fills
+that I have not been able to reproduce. I targeted not missing any copper,
+accepting that the KiCAD gerber fills reach more places, so add some copper
+on those layers.</p>
+
+<p>Drill hole sizes have not been checked. KiCAD seems to add ~0.85 mil more
+clearance around vias. This needs to be double checked but I'm hoping that
+we can just tolerate that.</p>
+
+<p>Importing WRL files (3D models) required some hacking of the altium2kicad
+tool that I haven't been able to work on upstreaming yet. Something is still
+not right here, but the board does have a fair amount of component (including
+the more special ones) in KiCAD 3D view.</p>
+
+<p>Another hack that has not been upstreamed is loading more of the source
+files, IIRC to get all component footprints properly converted.</p>
+
+<p>The KiCAD board does not pass DRC checks yet. I believe part of this is
+because design rule settings aren't (fully?) imported from Altium. Need
+to figure out the settings used for this project, and fix all drill sizes
+I think.</p>
+```
+
+[[RepositoryIndex(format=table,glob=user/ft/alpha_to_kicad)]]
+
+| Clone `https://git.cryptech.is/user/ft/alpha_to_kicad.git` |
+|---|
-- 
cgit v1.2.3