String Variables
Because there are so many ways to code numbers, the HP 16500C Logic
Analysis System handles almost all data as ASCII strings. Depending on your
host language, you may be able to use other types when reading in responses.
Sometimes it is helpful to use string variables in place of constants to send
instructions to the system, such as including the headers with a query
response.
Example
This example combines variables and constants in order to make it easier to
switch from MACHINE1 to MACHINE2 in slot 3. In BASIC, the
&
operator is
used for string concatenation.
10 LET Machine$ = ":SELECT 3:MACHINE2"
!Send all instructions to machine 2 in
!slot 3
20 OUTPUT XXX; Machine$ & ":TYPE STATE" !Make machine a state analyzer
30
! Assign all labels to be positive
40 OUTPUT XXX; Machine$ & ":SFORMAT:LABEL ’CHAN 1’, POS"
50 OUTPUT XXX; Machine$ & ":SFORMAT:LABEL ’CHAN 2’, POS"
60 OUTPUT XXX; Machine$ & ":SFORMAT:LABEL ’OUT’, POS"
99 END
If you want to observe the headers for queries, you must bring the returned
data into a string variable. Reading queries into string variables requires little
attention to formatting.
Example
This command line places the output of the query in the string variable
Result$.
ENTER XXX;Result$
The output of the system may be numeric or character data depending on
what is queried. Refer to the specific commands in Part 2 of this guide for
the formats and types of data returned from queries.
Introduction to Programming
String Variables
1–19
Summary of Contents for 16501A LOGIC
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Page 12: ...Contents 8 ...
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Page 15: ...1 Introduction to Programming ...
Page 38: ...1 24 ...
Page 39: ...2 Programming Over HP IB ...
Page 45: ...3 Programming Over RS 232 C ...
Page 55: ...4 Programming Over LAN ...
Page 68: ...4 14 ...
Page 69: ...5 Programming and Documentation Conventions ...
Page 81: ...6 Message Communication and System Functions ...
Page 91: ...7 Status Reporting ...
Page 93: ...Figure 7 1 Status Byte Structures and Concepts Status Reporting 7 3 ...
Page 97: ...Figure 7 2 Service Request Enabling Status Reporting Key Features 7 7 ...
Page 100: ...Figure 7 3 Parallel Poll Data Structure Status Reporting Parallel Poll 7 10 ...
Page 105: ...8 Error Messages ...
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Page 113: ...9 Common Commands ...
Page 116: ...Figure 9 1 Common Commands Syntax Diagram Common Commands 9 4 ...
Page 122: ...Figure 9 2 IST Data Structure Common Commands IST Individual Status 9 10 ...
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Page 133: ...10 Mainframe Commands ...
Page 135: ...Figure 10 1 Mainframe Commands Syntax Diagram Mainframe Commands 10 3 ...
Page 136: ...Figure 10 1 continued Mainframe Commands Syntax Diagram continued Mainframe Commands 10 4 ...
Page 159: ...11 SYSTem Subsystem ...
Page 161: ...Figure 11 1 System Subsystem Commands Syntax Diagram SYSTem Subsystem 11 3 ...
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Page 173: ...12 MMEMory Subsystem ...
Page 175: ...Figure 12 1 MMEMory Subsystem Commands Syntax Diagram MMEMory Subsystem 12 3 ...
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Page 199: ...13 INTermodule Subsystem ...
Page 201: ...Figure 13 1 Intermodule Subsystem Commands Syntax Diagram INTermodule Subsystem 13 3 ...
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Page 217: ...14 TGTctrl Subsystem ...
Page 219: ...Figure 14 1 Targetcontrol Subsystem Commands Syntax Diagram TGTctrl Subsystem 14 3 ...
Page 220: ...Figure 14 1 continued Targetcontrol Subsystem Commands Syntax Diagram TGTctrl Subsystem 14 4 ...
Page 233: ...Part 3 15 Programming Examples 15 1 Programming Examples ...
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