% render "layouts/guides.html" do

This page will be used to document any UltraFLEX-only APIs related to pattern generation,
however the goal is to have as few of these as possible so that Origen pattern source code can re-target
automatically to any supported platform.

There are no significant APIs in this category currently, therefore refer to the
[Common Pattern API](<%= path "guides/pattern/common" %>) which can fully target the UltraFLEX.

### DigSrc

UltraFlex supports <code>:digsrc</code> as a <code>tester.overlay_style</code> set like this:

~~~ruby
  tester.overlay_style = :digsrc
~~~

By default Origen will automatically place the digsrc start opcode at the beginning of the resulting pattern
when overlay is used. In some cases (like when the pattern is used in a pattern set that has already started
the instrument in a previous pattern, or possibly in svm_patterns) this behavior is undesirable.

The insertion of this start opcode can be disabled by placing the following code **before** any overlay operations
for a given pin.

~~~ruby
  tester.digsrc_skip_start :pin_or_group_name if tester.ultraflex?
  # Overlay operations can happen after this point
~~~

% end