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Set Run in Kernel Mode (External Mode) Scope Parameters

Connected IO mode and accelerator modes run the simulation algorithm in Simulink® and access the external hardware by using drivers running in operating system kernel mode. The Simulink block diagram is a user interface to your real-time application.

Run in Kernel mode connects your Simulink model to your real-time application. You can use the Simulink block diagram as a user interface as you can in Connected IO mode or accelerator mode.

This procedure uses the model sldrtex_model. To open this model, in the MATLAB® Command Window, type:


It assumes that you have already loaded that model.

After you have created a real-time application, you can enter scope parameters for signal tracing with Simulink Run in Kernel mode:

  1. In the Simulink Editor, on the Desktop Real-Time tab, click Prepare > Hardware Settings.

  2. In the Configuration Parameters dialog box, select the Code Generation > Simulink Desktop Real-Time node.

  3. If you select the External mode check box, your changes affect the real-time application.

    Check that the MEX-file name label has an entry of sldrtext. The MEX-file sldrtext.mex* is supplied with the Simulink Desktop Real-Time™ software. This file works with Simulink Run in Kernel mode and supports uploading signal data and downloading parameter values.

    Click OK.

    These settings appear in the Simulink Desktop Real-Time options tab of the configuration parameters dialog box.

  4. In the Simulink Editor, on the Desktop Real-Time tab, click Prepare > Control Panel. In the External Mode Control Panel, click the Signal & Triggering button.

  5. Select the Select all check box. From the Source list, select manual. From the Mode list, select normal.

    The X under Signal selection indicates that a signal is tagged for data collection. T indicates that the signal is tagged as a trigger signal.

  6. In the Duration field, enter the number of sample points in a data buffer. For example, to specify a sample rate of 1000 samples/second and a stop time of 10 seconds, enter:

  7. Select the Arm when connecting to target check box.

    If you do not select this check box, data is not displayed in the Scope window.

    Use the external signal and triggering window to apply these settings.

  8. Click Close.

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