LeCroy USB Protocol Suite Advisor T3, Руководство пользователя

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Chapter 11: Traffic Generation (2.0) USB Protocol Suite User Manual
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11.10 Format of Traffic Generation Files
Whether you create a traffic generation from scratch or use the Export command, there
are a few rules about the format of the generation file that you should review. These are
presented in this section.
Traffic is generated from a text file named
*.utg . Within the text file:
• The data format for data fields such as Pids and Raw bits is hex.
• Each packet definition consists of this set of assignments: key=value .
• White space is permitted around the equal sign.
• There are no restrictions on dividing packet definition to lines nor is it necessary to
define each packet in a separate line, although it is recommended.
• The maximum number of characters in a line is 250.
• The characters # and ; indicate end-of-line comments (i.e. the rest of the line is
ignored)
• Comments are not allowed within brackets ( ).
• No keys or values are case-sensitive.
Each packet definition starts with one of these assignments:
•
pid=N (where N is a string representing a valid packet identifier or an eight bit value)
• OR
• frame=N (where N is an eleven bit value of the frame number or the strings auto
and keep_alive ).
A bus condition definition starts with one of these assignments:
•
reset=N (where N is a positive integer or string)
• suspend=N (where N is a positive integer)
• resume=N (where N is a positive integer)
• chirp=here
Subsequent assignments after a packet’s starting assignment define the values of
particular fields within the packet. If a field is not defined, it is assumed to be
0 . Values
are assumed to be decimal unless they are prefixed with 0x and then are interpreted as
hexadecimal. Values within a data block assignment are always assumed to be
hexadecimal and should not be prefixed by
0x .
11.10.1 Script control of Intelliframe vs Bitstream modes
To force the .utg file to run in IntelliFrame mode, add the following text string to the
FIRST LINE of the . utg file.
;intelliframe=ON
To force the .utg file to run in Bitstream mode, add the following text string to the
FIRST LINE of the . utg file.
;intelliframe=OFF
These commands are useful if an automated interface, such as USB Compliance Suite,
is running a script.
If you run the script manually, to allow selection of IntelliFrame or Bitstream mode from
the toolbar, make sure the
.utg file has no such Intelliframe command line.