Using Simulink

Interacting with the Simulink Accelerator Programmatically

Using three commands, set_param, sim, and accelbuild, you can control the execution of your model from the MATLAB prompt or from M-files. This section describes the syntax for these commands and the options available.

Controlling the Simulation Mode

You can control the simulation mode from the MATLAB prompt using

• set_param(gcs,'simulationmode','mode')
  

or

• set_param(modelname,'simulationmode','mode')
  

You can use gcs ("get current system") to set parameters for the currently active model (i.e., the active model window) and modelname if you want to specify the model name explicitly. The simulation mode can be either normal or accelerator.

Simulating an Accelerated Model

You can also simulate an accelerated model using

• sim(gcs);   % Blocks the MATLAB prompt until simulation complete
  

or

• set_param(gcs,'simulationcommand','start'); % Returns to the 
                                              % MATLAB prompt 
                                              % immediately
  

Again, you can substitute the modelname for gcs if you prefer to specify the model explicitly.

Building Simulink Accelerator MEX-Files Independent of Simulation

You can build the Simulink Accelerator MEX-file without actually simulating the model by using the accelbuild command, for example,

• accelbuild f14
  

Creating the Accelerator MEX-files in batch mode using accelbuild allows you to build the C code and executables prior to running your simulations. When you use the Accelerator interactively at a later time, it does not need to generate or compile MEX-files at the start of the accelerated simulations.

You can use the accelbuild command to specify build options such as turning on debugging symbols in the generated MEX-file.

• accelbuild f14 OPT_OPTS=-g
  

Using the Simulink Accelerator with the Simulink Debugger

Comparing Performance