MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Betriebsanweisung PDF herunterladen (Seite 73)

Overview of the C MEX S-Function Routines

3-29

simulation(or theReal-TimeWorkshopexternalmode)ifan attempt ismade

to change the parameter.

• If your S- function outputs are discrete (e.g., can only take on the values, 1

and 2), then specify

SS_OPTION_DISCRETE_VALUED_OUTPUT.

• The

ssGetPath (the Simulink full model path to the block) and

ssGetModelName (here model refers to the S-function name) are available for

use. If they are the same (that is, if

strcmp(ssGetPath(S),ssGetModelName(S))==0), then the S-function is

being executed from the MATLAB command line and is not part o f a

simulation.

In mdlInitializeS izes, you also must specify the number of sample times for

your block. There are two ways of specifying sample times:

• Port-based sample times

• Block-based sample times

See “SettingSample Times forC MEXS-Functions”onpage 3-36for acomplete

discussion of sample time issues.

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MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Betriebsanweisung Seite 73