Give the branch a name and click update: Now you have the contents of the SVN repository being imported into Launchpad every so often (usually more than once per day).
The gamepad example applications have three different default configurations to enable a variety of potential control schemas.
These define the number of digital inputs and indicator outputs: 11/11 inputs and outputs, 16/6 inputs and outputs, or 20/2 inputs and outputs.
It enables knobs, faders and buttons to instantly control plug-in instruments/FX, as well as your sequencer's mixer, transport controls and more...
If the Device Version on your flash drive is 2.17, 2.18, 2.19 or 2.20, you will NEED to run the U3 LP Installer in a Windows XP environment to do an update.
Or do I need my own mechanism for pushing new source packages for every update from trunk? What you are looking for is called a source package recipe.