Using The Sequencer; To Trigger After A Sequence Of States - HP 64751 User Manual

Using the Sequencer

When you use the analyzer's sequencer, you can specify traces that trigger on a
series, or sequence, of states. You can specify a state which, when found, causes
the analyzer to restart the search for the sequence of states. Also, the analyzer's
sequencer allows you to trace "windows" of code execution.
This section describes how to:
•
Trigger on a sequence of states.
•
Specify a global restart state.
•
Trace "windows" of program execution.
The sequencing and windowing capabilities from within the Softkey Interface are
not as powerful or flexible as they are from within the Terminal Interface. For
example, in the Terminal Interface, you can specify different restart states for each
sequence term and you can set up a windowing trace specification where the trigger
does not have to be in the window. If you do not find the sequencing flexibility
you need from within Softkey Interface, refer to the 68340 Emulator User's Guide
for the Terminal Interface.

To trigger after a sequence of states

• Use the trace find_sequence command.
The analyzer's sequencer has several levels (also called sequence terms). Each
state in the series of states to be found before triggering, as well as the trigger state,
is associated with a sequence term.
The sequencer works like this: The analyzer searches for the state associated with
the first sequence term. When that state is captured, the analyzer starts searching
for the state associated with the second term, and so on. The last sequence term
used is associated with the trigger state. When the trigger state is captured the
analyzer is triggered. Up to seven sequence terms and an optional occurrence count
for each term are available.
Chapter 7: Using the Emulation Analyzer
Using the Sequencer
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