DSP Blockset

Configuring Simulink for DSP Systems

This appendix describes how to adjust certain Simulink settings to suit your needs.

Using dspstartup.m	Use the `dspstartup` M-file to preconfigure Simulink for DSP simulations.
Performance-Related Settings in dspstartup.m	Understand how the settings in the `dspstartup` M-file improve the performance of the simulation.
Miscellaneous Settings	Learn the other parameters that the `dspstartup` M-file adjusts to make it easier to run DSP simulations.

When you create a new DSP model, you might want to adjust certain Simulink settings to suit your own needs. A typical change, for example, is to adjust the Stop time parameter (in the Simulation Parameters dialog box) to a different value. Another common change is to specify the Fixed-step option in the Solver options panel to reflect the discrete-time nature of the DSP model.

The DSP Blockset provides an M-file, dspstartup, that lets you automate this configuration process so that every new model you create is preconfigured for DSP simulation. The M-file executes the following commands:

set_param(0, ...
    'SingleTaskRateTransMsg','error', ...
    'Solver',                'fixedstepdiscrete', ...
    'SolverMode',            'SingleTasking', ...
    'StartTime',             '0.0', ...
    'StopTime',              'inf', ...
    'FixedStep',             'auto', ...
    'SaveTime',              'off', ...
    'SaveOutput',            'off', ...
    'AlgebraicLoopMsg',      'error', ...
    'InvariantConstants',    'on', ...
    'ShowInportBlksSampModeDlgField','on', ...
    'RTWOptions',         [get_param(0,'RTWOptions')
                             ' -aRollThreshold=2']);

The following sections provide information about dspstartup:

For complete information on any of the settings, see the Simulink documentation.

ANSI/ISO C Code Generation Support Using dspstartup.m

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