Represent std_logic_vector in Simulink

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Brad 2023-9-6

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https://ww2.mathworks.cn/matlabcentral/answers/2017791-represent-std_logic_vector-in-simulink

评论： Kiran Kintali 2024-3-10

Does SIMULINK support creation of typical HDL data types or only MATLAB types (e.g. UINT32, FI, etc.)? Some of the inputs to my system do not fall neatly into power-of-2 variable sizing and I would like to be able to create something equivalent to std_logic_vector (10 downto 0) in SIMULINK. Even if I have to somehow create the datatype from scratch, is this possible?

I want to be able to use this datatype and assign it to my ports as their datatype.

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Answer 1

Kiran Kintali 2023-9-7

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https://ww2.mathworks.cn/matlabcentral/answers/2017791-represent-std_logic_vector-in-simulink#answer_1303696

编辑：Kiran Kintali 2023-9-8

在 MATLAB Online 中打开

HDL Coder supports fixed point data types with integer lengths ranging from 1 to 128 bits.

During the HDL code generation process, these map to the std_logic_vector type (typically used for arrays of std_logic variables and signals in VHDL).

Try HDL Code generation from some of example MATLAB Code and Simulink models foudn here..

https://www.mathworks.com/matlabcentral/fileexchange/50098-hdlcoder-design-patterns-and-examples

You can browse through the code samples in the HDL Coder documentation to get an idea of the std_logic and std_logic_vector types generated.

https://www.mathworks.com/help/hdlcoder/ug/resettable-subsystem-support-in-hdl-coder.html

y : OUT std_logic_vector(32 DOWNTO 0) -- sfix33_En20

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Brad 2024-3-7

If I need a std_logic_vector that exceeds 128 bits (127 downto 0) what data type should I use that allows me to select an arbitrary number of bits? I'm trying to populate a data dictionary and have some data that is more than 128 bits in size. I was thinking about using a boolean datatype and setting dimensions to my desired value. Will that also yield a std_logic_vector when hdl coder generates code?