Function-Call Generator

The block outputs function-call events only when the input at this port is a positive number.

Dependencies

To enable this port, select the Show enable port check box.

Sends function-call events to the function-call input port of a function-call subsystem or function-call model.

Specify the time interval between function-call events to a function-call subsystem or function-call model. If the actual calling rate for the subsystem or model differs from the time interval this parameter specifies, Simulink^® displays an error.

By default, the block uses a time interval of 1. To set a different interval, enter a valid sample time based on the table in Types of Sample Time, or specify -1 to inherit the time interval from the model.

Dependencies

To enable this parameter, clear the Show enable port check box. If you select Show enable port, sample time is automatically set to -1 (inherited).

Programmatic Use

Block Parameter: sample_time

Type: character vector

Values: '1' | scalar expression | vector expression | '-1'

Default: '1'

The value of this parameter can be a vector, where each element of the vector specifies a number of times to execute a function-call subsystem or model. If a vector is specified, then the block outputs a vector of function-call events, which can be split into individual function-call events using a Demux block and used to drive multiple function-call subsystems or models.

Suppose that you specify Number of iterations to be [3 2] and connect the output of this block to a Demux block, which is connected to the control ports of two function-call subsystems. In this case, the first function-call subsystem executes three times at each time step, and the second function-call subsystem executes two times at each time step.

If, however, you connect the output of this block to a single function-call subsystem or model, the total number of times that the function-call subsystem or model executes per time step is equal to the sum of the vector element values. So in the example above, specifying Number of iterations to be [3 2] and connecting the output of this block to a single function-call subsystem results in the function-call subsystem executing five times at each time step.

Settings

Programmatic Use

Block Parameter: numberOfIterations

Type: character vector

Values: '1' | integer in quotes | vector of integers in quotes

Default: '1'

Unless this parameter is selected, the output of this block is expanded into a vector, if necessary, to drive the blocks to which it is connected. For example, if Number of iterations is set to 2 and Disallow wide output is not selected, and the output of this block is connected to a Demux block, which is in turn connected to three separate function-call subsystems, then each function-call subsystem receives two function-call events at each time step. A similar result occurs if the output of this block is connected to a Stateflow^® chart with multiple events. If Disallow wide output is selected in these situations, the software produces an error.

Select this parameter to prevent implicit expansion of the output signal.

Clear this parameter to allow implicit expansion of the output signal when appropriate.

Programmatic Use

Block Parameter: DisallowWideOutput

Type: character vector

Values: 'off' | 'on'

Default: 'off'

Select this parameter to add a control signal input port to the block. The block outputs function-call events only when the value at the control signal input port is a positive number.

Clear this parameter to remove the control signal input port. The block outputs function-call events at every time step.

Programmatic Use

Block Parameter: ShowEnablePort

Type: character vector

Values: 'off' | 'on'

Default: 'off'