Section 6: Instrument programming Model 2657A High Power System SourceMeter® Instrument Reference Manual
6-16 2657A-901-01 Rev. B/December 2012
Create functions using scripts
You can use scripts to define functions. Scripts that define a function are like any other script: They
do not cause any action to be performed on the instrument until they are executed. The global
variable of the function does not exist until the script that created the function is executed.
A script can consist of one or more functions. Once a script has been run, the computer can call
functions that are in the script directly.
The following steps use TSB Embedded. You can also use the loadscript and endscript
commands to create the script over the remote interface. See Load a script by sending commands
over the remote interface (on page 6-4).
Steps to create a function using a script:
1. In TSB Embedded, enter a name into the TSP Script box. For example, type MakeMyFunction.
2. Enter the function as the body of the script. This example concatenates two strings:
MyFunction = function (who)
print("Hello " .. who)
end
3. Click Save Script.
MakeMyFunction is now on the instrument in a global variable with the same name as the script
(MakeMyFunction). However, the function defined in the script does not yet exist because the
script has not been executed.
4. Run the script as a function. For this example, send:
MakeMyFunction()
This instructs the instrument to run the script, which creates the MyFunction global variable.
This variable is of the type "function" (see Variable types
(on page 6-13)).
5. Run the new function with a value.
MyFunction("world")
The response message is:
Hello world
Group commands using the function keyword
The following script contains instrument commands that display the name of the person that is using
the script on the front panel of the instrument. It takes one parameter to represent this name. When
this script is run, the function is loaded in memory. Once loaded into memory, you can call the
function outside of the script to execute it.
When calling the function, you must specify a string for the name argument of the function. For
example, to set the name to John, call the function as follows:
myDisplay("John")
NOTE
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