Specifying Data Type for Code Generation with IQmath Library
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I am using the Embedded Coder Support Package for TI C2000 Processors. How do I specify the output data type for a Simulink block to be in the 'Q' format, as used in the TI IQmath library?
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MathWorks Support Team
2023-4-7
编辑：MathWorks Support Team
2023-4-7
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The correct way to configure a block to use the Q format is to specify a fixed-point output data type that matches the particular Q format in use. For example, to configure a block for a Q23 representation, specify the data type as "fixdt(1, 32, 23)" under Block Parameters > Signal Attributes > Output data type. This indicates a signed 32-bit fixed-point number with 23 fraction bits, which matches the Q23 representation. This is described on the following documentation page, under the heading "Q Format Notation":
Please see the documentation page of "fixdt" for more information on creating Fixed-Point Numbers in Simulink:
Additionally, please refer to the user's guide for the
C28x IQmath Library - A Virtual Floating Point Engine
, Literature Number SPRC087, available at the Texas Instruments Web site for more information on the IQmath library.
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2018-2-21
2023-4-7
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