struct memeber can not be Simulink.Parameter?

Question

dayu lai 2021-7-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/888282-struct-memeber-can-not-be-simulink-parameter

评论： dayu lai 2021-8-5

hi,

I am using HDL Coder to generate RTL code from simulink.

While I want some signal internal a simulink to be tunable, which names 'bp' for example. So I wrote following code:

bp = Simulink.Parameter;

bp.Value = [0;0;0];

bp.CoderInfo.StorageClass = 'ExportedGlobal';

Then the bp signal will appeared as a input port in RTL.

However, if I wrote like this:

reg.bp = Simulink.Parameter;

reg.bp.Value = [0;0;0];

reg.bp.CoderInfo.StorageClass = 'ExportedGlobal';

While generate RTL, it comes out error:

Invalid setting in '<some_block>' for parameter 'Value'.

error using slhdlcoder.SimulinkConnection/initModel

Expression 'reg.bp' for block '<some_block>' returns a Simulink.Parameter object that has property values that need to be evaluated. This object should be instantiated in a workspace and referenced by name in Simulink

So it seems struct member can not be simulink parameter?

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Answer 1

Kiran Kintali 2021-8-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/888282-struct-memeber-can-not-be-simulink-parameter#answer_758262

Can you share a sample model?

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dayu lai 2021-8-5

Hi, I use the same demo in other question

https://ww2.mathworks.cn/matlabcentral/answers/888157-how-to-assign-the-name-of-a-multiple-port-while-using-hdl-coder-generate-rtl-from-simulink?s_tid=prof_contriblnk

The demo above can generate RTL successfully. However, if I change the parameter of constant before comparator into structure memeber. The compile of MDL is fail.

See the attached png for detail.

In reality, there will be a lot of tunable value in my design. I just want them to be members of structure, like reg.tunable_value0, reg.tunable_value1 and etc. Otherwise my workspace would be full filled with the global tunable value.

How I can do it?

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