Supported Data Types and Scope
Supported Data Types
HDL Coder™ supports the following subset of MATLAB® data types.
|Types||Supported Data Types||Restrictions|
||In Simulink®, MATLAB Function block ports must use numeric types
HDL code generated with
When you have floating-point data types, to generate synthesizable HDL code, use:
Fixed-point numbers with slope (not equal to 1.0) and bias (not equal to 0.0) are not supported.
Maximum word size for fixed-point numbers is 128 bits.
The maximum number of vector elements allowed is 2^32.
Before a variable is subscripted, it must be fully defined.
Matrices are supported in the body of the design algorithm and as inputs to the top-level design function.
Matrices are not supported with the following HDL workflows:
Cosimulation workflows that use Simulink and SystemVerilog now support vector data types.
Arrays of structures are not supported.
For the FPGA Turnkey and IP Core Generation workflows, structures are supported in the body of the design algorithm, but are not supported as inputs to the top-level design function.
If your target language is Verilog®, all enumeration member names must be unique within the design.
Enumerations at the top-level DUT ports are not supported with the following workflows or verification methods:
Enumerations are supported for Simulink workflows and only for Verilog and SystemVerilog. Enumerations are not supported for VHDL®.
Unsupported Data Types
The following data types are not supported:
Scope for Variables
Global variables are not supported for HDL code generation.