Total Phase makes a high-speed USB 2.0 protocol analyzer for $1200, or a regular-speed USB protocol analyzer for $400. Here’s a trick someone mentioned: if you get the cheaper protocol analyzer and need to work with a high-speed USB device, you may be able to plug the high-speed device into a low-speed USB hub to slow the device down.
I decided to start with ladyada’s excellent guide to hacking a Kinect by reverse engineering USB packets. So here’s what I did.
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