MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Guide de l'utilisateur télécharger pdf (Page 339)

Building for the Rapid Simulation Target

13-9

<-o> Specifying a New Output Filename for the Simulation

If you have specified Save to Workspace options (that is, checked Time,

States, Outputs,orFinal States checkboxes on the Workspace I/O page of the

Simulation Parameters dialog box under the Simulation menu in Simulink),

the default is to save simulation logging results to the file

modelname.mat. You

can now specify a replacement filename for subsequent simulations. In the case

of the model

rsimtfdemo,bytyping!rsimtfdemo at the MATLAB prompt, a

simulation runs and data is normally saved to

rsimtfdemo.mat.

!rsimtfdemo

created rsimtfdemo.mat

You can specify a new output filename for data logging by typing:

!rsimtfdemo -o sim1.mat

In this case, the set of parameters provided at the time of code generation,

including any From File block data, is run. You can combine a variety of

rsim

flags to provide new data, parameters, and output files to your simulation.

Note that the MAT-file containing data for the From File blocks is required.

This differs from the

grt operation, which inserts MAT-file data directly into

the generated C code that is then compiled and linked as an executable. In

contrast,

rsim allows you to provide new or replacement data sets for each

successive simulation. A MAT-file containing From File or From Workspace

data must be present, however, if any of these blocks (From File or From

Workspace blocks) exist in your model.

<-p> Changing Block Parameters for an rsim Simulation

Once you have altered one or more parameter in the Simulink block diagram,

you can extract the parameter vector,

rtP,fortheentiremodel.ThertP vector,

along with a model checksum, can then be saved to a MATLAB MAT-file. This

MAT-file can be read in directly by the stand-alone

rsim executable allowing

you to replace the entire parameter vector quickly, for running studies of

variations of parameter values.

The model checksum provides a safety check to ensure that any parameter

changes are only applied to

rsim models that have the same model structure.

If any block is deleted, or a new block added, then when generating a new

rtP

vector, the new checksum will no longer match the original checksum. rsim will

detect this incompatibility in parameter vectors and exit to avoid returning

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MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Guide de l'utilisateur Page 339

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