Implement root-level I/O as

Specify how generated code passes root-level input and output to nonreusable subcomponent execution entry-point function

Since R2025a

Model Configuration Pane: Code Generation / Interface

Description

The Implement root-level I/O as parameter controls how root-level model input and output data is passed to a nonreusable subcomponent (model reference) model_step, model_initialize, or model_terminate entry-point function.

Dependencies

To enable this parameter, set the Code interface packaging (subcomponent) parameter to Nonreusable function.

Settings

Auto (default) | Individual arguments | Global variables
Auto

Same behavior as Individual arguments.

Individual arguments

Passes each root-level model input and output value to the subcomponent entry-point function as a separate argument.

Global variables

Passes each root-level model input and output value to the subcomponent entry-point function using global variables.

You cannot select Global variables if you:

  • Customize the function prototype of the subcomponent model_step function.

  • Assign a storage class other than Auto to root-level I/O ports and signals that directly feed into or propagate out of the subcomponent.

  • Configure the root-level model with a service interface or AUTOSAR target and connect root-level I/O ports directly to the subcomponent.

Recommended Settings

ApplicationSetting
DebuggingNo impact
TraceabilityNo impact
EfficiencyNo impact
Safety precautionNo impact

Programmatic Use

Parameter: SubcomponentRootIOFormat
Type: character vector
Values: 'Auto' | 'Individual arguments' | 'Global variables'
Default: 'Auto'

Version History

Introduced in R2025a

See Also

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