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coder.descriptor.types.Fixed Class

Namespace: coder.descriptor.types
Superclasses: coder.descriptor.types.Numeric

Return information about variable of fixed-point type

Since R2024a

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Description

An object of the coder.descriptor.types.Fixed class describes a variable in the generated code that is of a fixed-point type. The coder.descriptor.types.Fixed class is a subclass of the coder.descriptor.types.Numeric class.

Properties

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Identifier used in generated code for the corresponding modeling element, specified as a character vector.

Data Types: char

Name of the data type that is represented in Simulink, specified as a character vector.

Data Types: char

Whether the type qualifier contains const, specified as 1 or 0. If you cannot change the value of the variable during execution, the variable is preceded by the const keyword as the type qualifier in the generated code. This property returns 1 if the type qualifier contains const. This property returns 0 if the type qualifier does not contain const.

Data Types: logical

Whether the type qualifier contains volatile, specified as 1 or 0. If you cannot change the value of the variable during execution, the variable is preceded by the volatile keyword as the type qualifier in the generated code. This property returns 1 if the type qualifier contains volatile. This property returns 0 if the type qualifier does not contain volatile.

Data Types: logical

Word size of a numeric data type, specified as an integer number of bits.

Data Types: int32

Whether the data type is signed, specified as 1 if signed or 0 if unsigned.

Data Types: logical

Bias of the scaling, specified as a double.

The slope and the bias determine the scaling of a fixed-point number.

Data Types: double

Data type name and scaling mode, specified as a character vector with one of these values:

  • 'Fixed-point: binary point scaling' – Fixed-point data type and scaling defined by the word length and fraction length

  • 'Fixed-point: slope and bias scaling' – Fixed-point data type and scaling defined by the slope and bias

  • 'Fixed-point: unspecified scaling' – Fixed-point data type with unspecified scaling

  • 'Scaled double: binary point scaling' – Double data type with fixed-point word length and fraction length information retained

  • 'Scaled double: slope and bias scaling' – Double data type with fixed-point slope and bias information retained

  • 'Scaled double: unspecified scaling' – Double data type with unspecified fixed-point scaling

  • 'Double' – Built-in double

  • 'Single' – Built-in single

  • 'Half' – MATLAB® half-precision data type

  • 'Boolean' – Built-in boolean

This value is derived from the slope and bias values.

Scaling of the data type, represented as a character vector with one of these values:

  • 'BinaryPoint' – Scaling for the numerictype object is defined by the fraction length.

  • 'SlopeBias' – Scaling for the numerictype object is defined by the slope and bias.

  • 'Unspecified' – Temporary setting that is only available at numerictype object creation, and allows for the automatic assignment of a best-precision binary point scaling.

Slope of the scaling, specified as a double.

The slope and the bias determine the scaling of a fixed-point number.

Data Types: double

Slope adjustment factor of a slope and bias scaled number, specified as a positive scalar.

The slope adjustment is equivalent to the fractional slope of a fixed-point number.

Data Types: double

Fixed exponent of a slope and bias scaled number, specified as an integer.

Data Types: int32

Fraction length, in bits, specified as a integer.

Fraction length can be greater than word length. For more information, see Binary Point Interpretation (Fixed-Point Designer).

Data Types: int32

Version History

Introduced in R2024a

See Also

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