Teledyne LeCroy USB Chief - Users Manual - Manual (Page 75)

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Chief User’s Manual CATC Version 1.7
Decoding USB Requests
When your Decoding request does not belong to any of the defined Decoding
groups (Standard, Class, or Vendor),
• Select Decode USB Request from the Request menu.
You The USB Decode Request window appears.
This window provides definitions for the individual fields of the Request and the
returned data.
Decoding Class- and Vendor-Specific Descriptors
The decoding of Descriptors is organized in a way that is very similar to the
decoding of Requests. The Definition text files for Descriptors have a .dsc
extension. All Definition files are listed in the descriptors.lst file. Please refer to
the set of .dsc files provided by CATC for examples of how to add Descriptor
Decoding files to the application.
Creating a New Class or Vendor Definition
File
Decoding for a set of Class or Vendor Requests is defined in a special text file with
a .req extension. The Analyzer currently has Decoding Definition files for
• Standard Requests (standard.req)