Code generation

I'm trying to use code generation to have all calculations done in C then passed to Matlab. I'm currently having problems using coder.ceval. It is telling me 'Too many output arguments'.

function y = callfoo %#codegen

y = int32(0);

y = coder.ceval('func', int32(5), int32(5));

end

#include stdio.h

#include stdlib.h

#include "func.h"

int32_T func(real_T in1, real_T in2)

{

return in1-in2; }

Answer 1

[Kaustubha Govind]

Perhaps you are attempting to run this code in MATLAB? coder.ceval only applies during code generation. You may need to modify your code to something like:

function y = callfoo %#codegen

y = int32(0);
if isempty(coder.target)
  % Executing in MATLAB, call MATLAB equivalent of func
  y = 5 - 5;
else
y = coder.ceval('func', 5, 5); %in1 and in2 are double
end
end

Answer 2

[John Elliott]

In addition to the explicit problem that Kaustubha identified, you have declared you C function to accept real_T arguments, but you are passing int32_T arguments, so you either need to change the C code, or do what Kaustubha did (don't cast the inputs to int32).