Generating math expression LUT using variable from workspace

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Eirik Nordeng
Eirik Nordeng 2023-12-20
回答： Andy Bartlett 2023-12-20
I am following this guide for creating a LUT for a custom math function: Replace a Custom Function with a Lookup Table - MATLAB & Simulink - MathWorks Nordic
I must ensure consistency between the model and the HDL code and therefore wish to pass a confgiuration parameter from the workspace to the math function, but the approach for doing this is unclear to me.
I see that the -globals flag is not supported by "fiaccel -float2fixed". I tried using the -args option, but this does not seem like the correct approach.
How can I pass a constant configuration parameter to the function used for generating the LUT?

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Andy Bartlett
Andy Bartlett 2023-12-20
I assume you are modeling your design in Simulink.
I suggest you look at using the Function Approximation tooling to create an approximation using a Simulink Lookup Table block.
This tooling provides several optimizations such as data types, size of lookup table, etc. Please check out the optimization options, especially this one.
HDLOptimized — Whether to generate HDL-optimized approximate
If you need a MATLAB based approximation instead of one using the Simulink Lookup Table, change the default for this option.
ApproximateSolutionType — How to output optimized lookup table
'Simulink' (default) | 'MATLAB'

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