Instrument Control Toolbox

Saving Objects to a MAT-File

You can save an instrument object to a MAT-file just as you would any workspace variable -- using the save command. For example, to save the GPIB object g, and the variables cmd and out defined in the preceding section to the MAT-file mygpib1.mat:

• save mygpib1 g cmd out
  

Read-only property values are not saved. Therefore, read-only properties use their default values when you load the instrument object into the MATLAB workspace. To determine if a property is read-only, use the propinfo function or examine the property reference pages.

Loading the Instrument Object

To load an instrument object that was saved to a MAT-file into the MATLAB workspace, use the load command. For example, to load g, cmd, and out from MAT-file mygpib1.mat:

• load mygpib1
  

The display summary for g is shown below. Note that the read-only properties such as Status, BytesAvailable, ValuesReceived, and ValuesSent are restored to their default values.

• GPIB Object Using NI Adaptor : GPIB0-1
  
  Communication Address 
     BoardIndex:         0
     PrimaryAddress:     1
     SecondaryAddress:   0
  
  Communication State 
     Status:             closed
     RecordStatus:       off
  
  Read/Write State  
     TransferStatus:     idle
     BytesAvailable:     0
     ValuesReceived:     0
     ValuesSent:         0
  

Saving and Loading Instrument Objects

Debugging: Recording Information to Disk