User`s guide

Features of the Online DSP Block Reference
5-3
About Tunable Parameters
Tunable parameters are block parameters whose settings you can change or
tune during a simulation. In the “Dialog Box” section of the block reference
pages, these parameters are marked “Tunable” in the parameter descriptions.
To tune a tunable parameter during a simulation, open the block parameters
dialog, change the parameter to the desired setting, then press the
OK or
Apply button.
Parameters that are not labeled “Tunable” are not tunable. During a
simulation, the fields, pull-down menus, and check boxes of nontunable
parameters become gray and cannot be edited.
About Supported Data Types
Many DSP Blockset blocks can support all built-in data types, as well as
custom data types and the fixed-point data type. To see which data types a
particular block supports, check the “Supported Data Types” section of its
reference page.
Note that not all blocks support all of the following data types.
Correctly Defining Custom Data Types. Custom data types are user-defined data
types. You must define your custom data types by following the guidelines in
the Custom Data Types section in the “Implementing Block Features” section
of the “Writing S-Functions” Simulink documentation. If you do not follow the
Simulink guidelines for creating custom data types, the DSP Blockset blocks
will not support your custom data types.
Data Types Supported by the DSP Blockset:
•Fixed-point data type
•Custom data types
•Simulink built-in data types (and commands for casting values to these data
types):
- Boolean —
boolean
- Integer (8-,16-, or 32-bits) — int8, int16, int32
- Unsigned integer (8-,16-, or 32-bits) — uint8, uint16, uint32
- Single-precision floating point — single
- Double-precision floating point — double