MATLAB: How to get a complete record of a signal from the xPC Target using xPC Target 2.0.1 (R13SP1)

completecontinuousdatadownloadrecordscopesignalSimulink Real-Timetargetxpc

How can I get a complete record of a signal from my xPC Target using xPC Target 2.0.1 (R13SP1)?

I am running my model on an xPC Target in external mode. How can I get a complete record of a signal from the xPC Target?

Best Answer

You can use two xPC host scopes to collect the data. Have the first scope trigger the second scope and the second scope trigger the first scope. Then use a script in MATLAB to collect the data from multiple scopes and save the data into a single MATLAB variable while your simulation is running on the xPC Target.

See following steps for a complete example illustrating the above-described solution:

1) Download the files linked at the bottom of this solution and place them in a directory on your MATLAB path

2) Make sure that you are properly connected to your xPC Target box by running the XPCTEST command

3) Open the downloaded model by typing the following at at the MATLAB command prompt

test_logging

4) Build the test_logging model by selecting Simulation -> Simulation Parameters from the menu and selecting the RTW pane and clicking on the Build button

5) When the build completes successfully, type the following at the MATLAB command prompt to run the downloaded script

collect_data

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MATLAB: How to save all of the data from a simulation running in external mode to one file

Hi Matt,

We've heard this request from customers before and we have it in our plans to address it sometime in the future. For now, you can save the complete simulation data using the 'External Mode Control Panel'. You can do it in two different ways.

1) Increase the External mode trigger duration.

If you have a finite running simulation, you can change the External mode trigger duration to log more data. From your model, go to Code->External Mode Control Panel-> Signal & triggering -> Duration. Set this to a number that might be enough for you to capture the simulation data. Please note that some targets might limit you to have a specific trigger duration.

2) Saving simulation data to MAT files

You can also save simulation data to MAT file(s). The number of MAT files generated will depend on the 'External mode trigger duration'. For example: If the trigger duration is set to 100 and the complete simulation generates 200 data points, you will get two MAT files. The first will have data stored in a variable from T1 -> T100 and the second will have data from T101 -> T200. You can follow the steps below to try this out.

    a) Code -> External Mode Control Panel -> Data Archiving
    b) Check the 'Enable archiving' box. 
    c) In the 'Directory' edit box, specify a directory where you'd like to save the MAT file(s)
    d) In the 'File' edit box, enter a name for your MAT file.

Let me know if you have other questions!

Thanks,

Siddharth

MATLAB: Am I able to choose which PCI-bus Ethernet card is shipped with xPC Target 2.0.1 (R13SP1)

Currently, the Ethernet card in stock and shipping with xPC Target 2.0.1 (R13SP1) is the Intel Pro/100S. The SMC 1208BT is an older card that is no longer available.

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