Teledyne LeCroy Conquest User Manual - Users Manual - Manual (Page 216)

Appendix A
206
ASL Script Structure
An ASL Script file includes three types of sections:
• Protocol Extraction Section
• Protocol Decoding Section
• USB Descriptor Section
Each ASL script can include only one of each section type. Not every script file
requires both Protocol Decoding and USB Descriptor sections, however as
minimum each script file must contain a Protocol Extraction section, and one
of Protocol Decoding or USB Descriptor sections.
Each section serves a specific function during the decoding process.
A section consists of one or more blocks. A block is a procedure that is formed
with a series of statements that are enclosed within the block. Each block has
a dedicated function within the section and follows one of two formats as
shown:
Blockname
Statement1;
Statement2;
….
StatementN;
EndBlock
or
{
Statement1;
Statement2;
….
StatementN;
}
Section Type Function
Protocol Extraction
Instructs the decoder on how to extract the high-level protocol data
from USB transactions.
Protocol Decoding
Breaks the extracted data stream into protocol fields and decodes
the data per each field.
USB Descriptor
Decodes descriptor information that is transferred by standard
GetDescriptor and SetDescriptor requests.