Datentyp-Konvertierung und -Casting
Datentyp-Konvertierung und -Casting bezieht sich auf das Wechseln von einem Datentyp zu einem anderen Datentyp. Mit Fixed-Point Designer™ können Sie Datentypen erstellen und optimieren, die Anforderungen an die numerische Präzision und Beschränkungen der Zielhardware erfüllen.
Themen
- Parameter and Signal Conversions
Conversions of data types of parameters and signals in Simulink® simulations.
- Conversions and Arithmetic Operations
Example highlighting how the data types are converted and arithmetic operations are performed on inputs and parameters in the Simulink software.
- Fixed-Point Arithmetic
Addition, subtraction, multiplication, casts, modulo, and two’s complement arithmetic.
- Cast from Doubles to Fixed Point
Simulate a continuous signal with fixed-point data types using Fixed-Point Designer to adjust scaling, rounding, and overflow handling.
- Display Port Data Types
Three parts of the port display for fixed-point signals: the data type, the number of bits, and the scaling.
- fi Objects and C Integer Data Types
Comparison of ANSI C integer data type ranges, conversions, and exception handling with those of
fiobjects. - Cast fi Objects
Information on casting
fiobjects.
Enthaltene Beispiele
Double to Fixed-Point Conversion
How to convert signals between built-in and fixed-point data types and illustrates how fixed-point data types affect the representable precision and range. The fixed-point data type used in this model is fixdt(1,5,2), which is a signed 5-bit number with 2 bits to the right of the binary point:
Fixed-Point to Fixed-Point Inherited Conversion
Use the Data Type Conversion block FixPt To FixPt Inherited. Because Simulink® propagates data types throughout a block diagram, fixed-point utility modeling can be templatized for multiple use scenarios. The data type inheritance capability can be given additional information through the use of various relative-type specifications. The FixPt To FixPt Inherited block provides a way to specify that "this signal should have the same fixed-point data type as that signal" by wiring it up to the signals of interest.
