Implementing custom MATLAB functions in Simulink

Question

I would like to use a custom MATLAB function in Simulink. So far I have done it by placing an embedded MATLAB function block. However, if the custom function contains another custom function the compile process fails.

Here is the example of function I am trying to embed in the simulation:

function [c, d, iterationsCount] = decodeLDPC(y, H, variance)
Lci = initializeLq(y, H, variance);
Lr = getLr(Lci);
[Lq, c] = getLq(Lci, H, Lr);
iterationsCount = 1;

while(sum(mod(c * H', 2)) ~= 0)
    Lr = getLr(Lq);
    [Lq, c] = getLq(Lq, H, Lr);
    iterationsCount = iterationsCount + 1;
end;
G = getGeneratorMatrix(H);
d = c/G;

where initializeLq and getLr are custom functions as well.

Is there a method to implement the above function in the simulation?

Answer 1

You need to use the command eml.extrinsic to call any external MATLAB functions from an EML block. For example, you can put this at the top of your EML function,

eml.extrinsic('getLr', 'initializeLq');

to allow those functions to be called. For more information, see the documentation