icdevice - Create device object

Syntax

obj = icdevice('driver', hwobj) obj = icdevice('driver', 'RsrcName') obj = icdevice('driver') obj = icdevice('driver', hwobj, 'P1', V1, 'P2', V2,...) obj = icdevice('driver', 'RsrcName','P1', V1, 'P2', V2,...) obj = icdevice('driver','P1', V1, 'P2', V2,...)

Arguments

`driver`	A MATLAB instrument driver.
`hwobj`	An interface object.
`RsrcName`	VISA resource name.
`'P1', 'P2',...`	Device-specific property names.
`V1, V2,...`	Property values supported by corresponding `P1, P2,...`.
`obj`	A device object.

Description

obj = icdevice('driver', hwobj) creates the device object obj. The instrument-specific information is defined in the MATLAB interface instrument driver, driver. Communication to the instrument is done through the interface object, hwobj. The interface object can be a serial port, GPIB, VISA, TCPIP, or UDP object. If driver does not exist or if hwobj is invalid, the device object is not created.

Device objects may also be used with VXIplug&play and Interchangeable Virtual Instrument (IVI) drivers. To use these drivers, you must first have a MATLAB instrument driver wrapper for the underlying VXIplug&play or IVI driver. If the MATLAB instrument driver wrapper does not already exist, it may be created using makemid or midedit. Note that makemid or midedit only needs to be used once to create the MATLAB instrument driver wrapper.

obj = icdevice('driver', 'RsrcName') creates a device object obj, using the MATLAB instrument driver, driver. The specified driver must be a MATLAB VXIplug&play instrument driver or MATLAB IVI instrument driver. Communication to the instrument is done through the resource specified by rsrcname. For example, all VXIplug&play, and many IVI drivers require VISA resource names for rsrcname.

obj = icdevice('driver') constructs a device object obj, using the MATLAB instrument driver, driver. The specified driver must be a MATLAB IVI instrument driver, and the underlying IVI driver must be referenced using a logical name.

obj = icdevice('driver', hwobj, 'P1', V1, 'P2', V2,...), obj = icdevice('driver', 'RsrcName','P1', V1, 'P2', V2,...), and obj = icdevice('driver','P1', V1, 'P2', V2,...), construct a device object, obj, with the specified property values. If an invalid property name or property value is specified, the object will not be created.

Note that the parameter-value pairs can be in any format supported by the set function: parameter-value string pairs, structures, and parameter-value cell array pairs.

Additionally, you can specify property names without regard to case, and you can make use of property name completion. For example, these commands are all valid and equivalent:

d = icdevice('tektronix_tds210',g,'ObjectVisibility','on');
d = icdevice('tektronix_tds210',g,'objectvisibility','on');
d = icdevice('tektronix_tds210',g,'ObjectVis','on');

Tips

At any time, you can use the instrhelp function to view a complete listing of properties and functions associated with device objects.

instrhelp icdevice

When you create a device object, these property values are automatically configured:

Interface specifies the interface used to communicate with the instrument. For device objects created using interface objects, it is that interface object. For VXIplug&play and IVI-C, this is the session handle to the driver session. For IVI-COM and MATLAB instrument drivers, this is the handle to the driver's default COM interface.
LogicalName is an IVI logical name. For non-IVI drivers, it is empty.
Name is given by concatenating the instrument type with the name of the instrument driver.
RsrcName is the full VISA resource name for VXIplug&play and IVI drivers. For MATLAB interface drivers, RsrcName is an empty string.
Type is the instrument type, if known (for example, scope or multimeter).

To communicate with the instrument, the device object must be connected to the instrument with the connect function. When the device object is constructed, the object's Status property is closed. Once the device object is connected to the instrument with the connect function, the Status property is configured to open.

Examples

The first example creates a device object for a Tektronix TDS 210 oscilloscope that is connected to a Keithley GPIB board, using a MATLAB interface object and MATLAB interface instrument driver.

g = gpib('keithley',0,2);
d = icdevice('tektronix_tds210',g);

Connect to the instrument.

connect(d);

List the oscilloscope settings that can be configured.

props = set(d);

Get the current configuration of the oscilloscope.

values = get(d);

Disconnect from the instrument and clean up.

disconnect(d);
delete([d g]);

The second example creates a device object for a Tektronix TDS 210 oscilloscope using a MATLAB VXIplug&play instrument driver.

This example assumes that the 'tktds5k' VXIplug&play driver is installed on your system.

This first step is necessary only if a MATLAB VXIplug&play instrument driver for the tktds5k does not exist on your system.

makemid('tktds5k', 'Tktds5kMATLABDriver');

Construct a device object that uses the VXIplug&play driver. The instrument is assumed to be located at GPIB primary address 2.

d = icdevice('Tktds5kMATLABDriver', 'GPIB0::2::INSTR');