Making Complex Trace Measurements
You can have the analyzer record bus activity by simply using the trace command
without any options. But this doesn’t use the analyzer effectively for two reasons:
•
the trace memory may fill before the program reaches the states of interest.
•
you may have to search through a long trace list to find a few states pertinent to
your measurement problem.
The HP 64700 analyzer has trigger and sequence capabilities that help solve these
problems. These tools act as a filter for processor bus activity that allows the
analyzer to capture only the states you want to see in the measurement.
A trigger tells the analyzer to identify a certain bus state as a point of reference in
the trace of states. A sequence is a more complex specification that specifies a
series of bus states that must be found to satisfy the trigger.
This section tells you how to get the most out of the HP 64700 analyzer by using
trigger and sequence specifications. It also describes additional measurement tools
to help you get more information from the trace.
Many of the options in this section can be combined one or more times. See the
trace syntax in Chapter 11, "Emulator Commands", for more information.
Expressions are an important part of trace specifications because they specify the
numeric or logical values that the analyzer matches for trigger and storage.
Expressions are represented by the <expression> symbol in this chapter. Refer to
Chapter 11, "Emulator Commands", for specifics on expression syntax.
Expressions in Trace Commands
When modifying the analysis specification, you can enter expressions that consist
of values, symbols, and operators.
Values
Values are numbers in hexadecimal, decimal, octal, or binary. These
number bases are specified by the following characters:
B b
Binary (example: 10010110b).
Q q O o
Octal (example: 377o or 377q).
D d (default)
Decimal (example: 2048d or 2048).
Chapter 5: Using the Emulation-Bus Analyzer
Making Complex Trace Measurements
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Страница 33: ...1 Getting Started 3 ...
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Страница 71: ...2 Solving Quick Start Problems Solutions to problems you might face during the Getting Started procedures 41 ...
Страница 75: ...Part 2 Using The Emulator 45 ...
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Страница 141: ...4 Using the Emulator How to control the processor and view system resources 111 ...
Страница 227: ...5 Using the Emulation Bus Analyzer How to record program execution in real time 197 ...
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Страница 311: ...7 Making Software Performance Measurements How to make software performance measurements on your programs 281 ...
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Страница 383: ...9 Solving Problems What to do when the emulator doesn t behave as expected 353 ...
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Страница 399: ...10 Using Memory Management Understanding logical and physical emulation and analysis 369 ...
Страница 429: ...11 Emulator Commands The command syntax reference for the emulator softkey interface 399 ...
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Страница 607: ...15 Microtec Language Tools Used With MC68040 Emulators Using the emulator analyzer with Microtec language tools 577 ...
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Страница 645: ...Chapter 18 Connecting the Emulator to a Target System Plugging The Emulator Into A Target System 615 ...
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Страница 746: ...Chapter 19 Installation and Service Verifying the Installation 716 ...
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