Implement logic signals as Boolean data (vs. double)

Description

Controls the output data type of blocks that generate logic signals.

Category: Simulation Target

Settings

Default: On

On

Blocks that generate logic signals output a signal of boolean data type. This reduces the memory requirements of generated code.

Off

Blocks that generate logic signals output a signal of double data type. This ensures compatibility with models created by earlier versions of Simulink^® software.

Tips

• Setting this option on reduces the memory requirements of generated code, because a Boolean signal typically requires one byte of storage compared to eight bytes for a double signal.

• Setting this option off allows the current version of Simulink software to run models that were created by earlier versions of Simulink software that supported only signals of type double.

• This optimization affects the following blocks:

  • Logical Operator block – This parameter affects only those Logical Operator blocks whose Output data type parameter specifies Inherit: Logical (see Configuration Parameters: Optimization). If this parameter is selected, such blocks output a signal of boolean data type; otherwise, such blocks output a signal of double data type.

  • Relational Operator block – This parameter affects only those Relational Operator blocks whose Output data type parameter specifies Inherit: Logical (see Configuration Parameters: Optimization). If this parameter is selected, such blocks output a signal of boolean data type; otherwise, such blocks output a signal of double data type.

  • Combinatorial Logic block – If this parameter is selected, Combinatorial Logic blocks output a signal of boolean data type; otherwise, they output a signal of double data type. See Combinatorial Logic in the Simulink Reference for an exception to this rule.

  • Hit Crossing block – If this parameter is selected, Hit Crossing blocks output a signal of boolean data type; otherwise, they output a signal of double data type.

Dependencies

• This parameter is disabled for models created with a version of Simulink software that supports only signals of type double.

Command-Line Information

Parameter: BooleanDataType

Value: 'on' | 'off'

Default: 'on'

Recommended Settings

Application	Setting
Debugging	No impact
Traceability	No impact
Efficiency	On
Safety precaution	On

Related Topics

• Optimize Generated Code Using Boolean Data for Logical Signals (Simulink Coder)
• Math and Data Types Pane