Update simulink block parameters on xPC target

I would like to update the paramters in a compiled simulink model running on a xPC target. I am able to set most parameters though the (target handle).set_param(XX, XX) function. However, I do not know how to set block parameters like for instance, the sample time of a digital clock or the number of samples to hold in a buffer, on the compiled instance of the model. Is it possible to set these parameters without having to recompile each time, and if so how?

Many thanks Nick G.

Answer 1

[Rajiv Ghosh-Roy]

Certain parameters are not tunable. From the examples you gave, it appears that these are not. For instance, for the number of samples in a buffer, this would determine the size of the buffer: this would be built into the code and does require a rebuild.

Answer 2

[Nick]

Thanks Rajiv, so then as a follow up can you tell me how I could programatically set the buffer size in a script?

Thanks, Nick

[Rajiv Ghosh-Roy]

This is slightly more involved as you will need to find the name of the particular parameter. Using the Integrator block as an example,

>> get_param(gcb, 'DialogParameters')
ans = 
              ExternalReset: [1x1 struct]
     InitialConditionSource: [1x1 struct]
           InitialCondition: [1x1 struct]
                LimitOutput: [1x1 struct]
       UpperSaturationLimit: [1x1 struct]
       LowerSaturationLimit: [1x1 struct]
         ShowSaturationPort: [1x1 struct]
              ShowStatePort: [1x1 struct]
          AbsoluteTolerance: [1x1 struct]
                IgnoreLimit: [1x1 struct]
                  ZeroCross: [1x1 struct]
  ContinuousStateAttributes: [1x1 struct]

I can then guess that InitialCondition is the parameter I want to use. I can verify that this is the case by executing get_param(gcb, 'InitialCondition'), and checking the value. At this point, I can execute set_param(gcb, 'InitialCondition', '6'). Note that you must set the value as a string.

Of course, you will need to this with the block you want to use and find the actual parameter name.

See the help for get_param and set_param

[ABISHA P]

how to call .m file in simulink model for performing filtering operations like sliding window , savtzky golay filter , spectrogram generation, these operations are done in m file same thing has to be called in simulink ? How can i do it?