Obtain sample time in Embedded Matlab block

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Anders 2012-7-30

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Sorry if this has been asked many times before, but I couldn't find an answer.

If I have an embedded Matlab block with inherited sample time, can I somehow obtain the evaluated sample time in the code of the embedded block at runtime? This is possible for an S-function and it would be really sweet if it was possible for embedded blocks as well.

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Answer 1

Ryan G 2012-7-30

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在 MATLAB Online 中打开

I don't believe you can do this directly but you could use this code in the EML block with a clock as an input:

function y = fcn(u)
%#codegen
persistent time12
if isempty(time12)
    time12 = 0;
end
deltaT = u - time12;
time12 = u;
y = deltaT;

Where the block is at the same inherited sample rate.

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Answer 2

Azzi Abdelmalek 2012-7-30

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编辑：Azzi Abdelmalek 2012-7-30

you can use a "zoh" block (simulink/discret/Zero Order Holder), with a sample time of your choice. You place it at the inputs (or/and) outputs of the embedded matlab function block

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Answer 3

Anders 2012-7-31

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So basically it's not easily obtainable then. Thanks for those answers anyway. I guess I will have to make a feature request if someone hasn't already. There should be a possibility to access a struct with simulation info or something similar. Not supported on all target hardware of course but for simulation at least.