From cb7836866e02bf86205b1120a4093f49a9571e44 Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Sun, 17 Jan 2016 11:51:04 +0100
Subject: icetime docs

---
 docs/index.html    | 9 ++++++++-
 icefuzz/timings.py | 3 ++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/docs/index.html b/docs/index.html
index d8e676e..446b855 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -132,6 +132,13 @@ that has blocks of <span style="font-family:monospace">0</span> and <span style=
 <span style="font-family:monospace">icepack</span> program converts such an ASCII file back to an iCE40 <span style="font-family:monospace">.bin</span> file.
 </p>
 
+<h3>IceTime</h3>
+
+<p>
+The <span style="font-family:monospace">icetime</span> program is an iCE40 timing analysis tool. It reads designs in IceBox ASCII format and writes times timing
+netlists that can be used in external timing analysers. It also includes a simple topological timing analyser that can be used to create timing reports.
+</p>
+
 <h3>IceBox</h3>
 
 <p>
@@ -398,7 +405,7 @@ e.g. using the following BibTeX code:
 
 <p>
 <i>Documentation mostly by Clifford Wolf &lt;clifford@clifford.at&gt; in 2015. Based on research by Mathias Lasser and Clifford Wolf.<br/>
-Buy an <a href="http://www.latticesemi.com/icestick">iCEstick</a> from Lattice and see what you can do with the information provided here. Buy a few because you might break some..</i>
+Buy an <a href="http://www.latticesemi.com/icestick">iCEstick</a> from Lattice and see what you can do with the information provided here.</i>
 </p>
 
 </body></html>
diff --git a/icefuzz/timings.py b/icefuzz/timings.py
index 75215d5..51d99f4 100644
--- a/icefuzz/timings.py
+++ b/icefuzz/timings.py
@@ -261,7 +261,8 @@ for filename in txt_inputs:
 # Filter database
 
 for celltype in ignore_cells:
-    del database[celltype]
+    if celltype in database:
+        del database[celltype]
 
 
 ###########################################
-- 
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