HP Drive manual Generate an Instrument Wrapper, Configure and Control the Instrument

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11Select File and Save IVI Configuration Store. Saving to the store may take several moments.

12Close the Test & Measurement Tool.

Generate an Instrument Wrapper

We will now automatically generate an instrument driver wrapper file (.mdd) so that

MATLAB can use the IVI driver.

At the MATLAB command prompt, type

makemid(‘dmm’);

The file dmm.mdd appears in the current directory window. This is the instrument wrapper created by the makemid command. You may now use MATLAB to communicate with your instrument through an IVI driver.

Note: To help you learn the structure of a driver faster, MATLAB provides autocompletion support. As you are typing your commands for a driver, press the Tab key to get a selection of possible completions. You can also use the command “get” to see a list of possible properties and “methods” to get a list of methods on the object. “methodsview” will give you a graphical display of the methods also.

Configure and Control the Instrument

You can interact with the instrument by using the Test & Measurement Tool or the

MATLAB command line. We use the MATLAB command line here.

Note: All MATLAB methods and properties are available at the command line.

Create an Instance of the Instrument

To create an instance of the instrument, type

myDmm = icdevice(‘dmm’);

Connect to the Instrument

Similar to the Initialize command in most ADEs, the Connect command in MATLAB initializes the instrument. The instrument will be initialized with the properties you specified using the Test & Measurement Tool. Type

connect(myDmm);

Configure the Instrument

To set a range of 1.5 volts and resolution of 0.001 volts, type

myDmm.Range = 1.5; myDmm.Resolution = 0.001;

Using IVI with MATLAB® 61

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HP Drive manual Generate an Instrument Wrapper, Configure and Control the Instrument, Create an Instance of the Instrument

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