String Constant - Output specified string - Simulink (original) (raw)
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Libraries:
Simulink / String
Description
The String Constant block outputs a string specified by theString parameter. Use this block when you want a constant whose type is string.
Limitations
The Output data type parameter does not support string data types that use symbolic expressions to specify the maximum length because signals with symbolic dimensions must be driven by a block with nonconstant sample time. For example, the Output data type parameter specified asstringtype("N") with N defined as a symbolic expression is not supported.
Ports
Output
Output string, specified as a scalar.
Data Types: string
Parameters
Input string, specified as a scalar.
Programmatic Use
| Block Parameter: String |
|---|
| Type: character vector |
| Values: '"Hello!"' | scalar |
| Default: '"Hello!"' |
Output data type, specified using the string data type to specify a string with no maximum length.
To specify a string data type with a maximum length, specifystringtype(_`N`_). For example, stringtype(31) creates a string data type with a maximum length of 31 characters.
Click the Show data type assistant button 
to display the Data Type Assistant, which helps you set the data type attributes. SeeSpecify Data Types Using Data Type Assistant for more information.
Programmatic Use
| Block Parameter: OutDataTypeStr |
|---|
| Type: character vector |
| Values: 'string' | |
| Default: 'string' |
Use the stringtype function, for example,stringtype(31).
Dependency
Clicking the Show data type assistant button enables this parameter.
Block Characteristics
| Data Types | string |
|---|---|
| Direct Feedthrough | no |
| Multidimensional Signals | no |
| Variable-Size Signals | no |
| Zero-Crossing Detection | no |
Extended Capabilities
HDL Coder™ provides additional configuration options that affect HDL implementation and synthesized logic.
HDL Architecture
This block has one default HDL architecture.
HDL Block Properties
| ConstrainedOutputPipeline | Number of registers to place at the outputs by moving existing delays within your design. Distributed pipelining does not redistribute these registers. The default is0. For more details, see ConstrainedOutputPipeline (HDL Coder). |
|---|---|
| OutputPipeline | Number of output pipeline stages to insert in the generated code. Distributed pipelining and constrained output pipelining can move these registers. The default is0. For more details, see OutputPipeline (HDL Coder). |
Version History
Introduced in R2018a