Set the sample time of an input port that inherits its sample time from the port to which it is connected
#define MDL_SET_INPUT_PORT_SAMPLE_TIME void mdlSetInputPortSampleTime(SimStruct *S, int_T port, real_T sampleTime, real_T offsetTime)
SimStruct representing an S-Function block.
Index of a port.
Inherited sample time for
Inherited offset time for
The Simulink® engine invokes this method with the sample
port inherits from the port to which
it is connected.
For C MEX S-functions, if the inherited sample time is acceptable,
this method sets the sample time of
port to the
inherited time, using
ssSetInputPortOffsetTime. If the sample
time is unacceptable, this method generates an error via
ssSetErrorStatus. Note that any other
input or output ports whose sample times are implicitly defined by
virtue of knowing the sample time of the given port can also have
their sample times set via calls to
This method is only valid for simulation, and must be enclosed in
#if defined(MATLAB_MEX_FILE) statement.
The engine calls this method until all input ports with inherited sample times are specified.
When inherited port-based sample times are specified, the sample
time is guaranteed to be one of the following where
period < inf and
0.0 <= offset < period.
|Sample Time||Offset Time|
Constant, triggered, and variable-step sample times are not propagated to S-functions with port-based sample times.
mdlSetInputPortSampleTime is called
once per port with the input port sample time. However, there can
be cases where this function is called more than once. This happens
when the simulation engine is converting continuous sample times to
continuous but fixed in minor steps sample times. When this occurs,
the original values of the sample times specified in
restored before this method is called again.
The final sample time specified at the port can be different from (but equivalent to) the sample time specified by this method. This occurs when
The model uses a fixed-step solver and the port has a continuous but fixed in minor step sample time. In this case, the Simulink engine converts the sample time to the fundamental sample time for the model.
The engine adjusts the sample time to be as numerically
sound as possible. For example, the engine converts
The S-function can examine the final sample times in