How can I convert double to const real_T of a sfunction?

Hi everyone :) ,

I am working on my Masters and have a C-code which I have to put into a sfunction for SIMULINK. As an in between result I have a value of an variable of datatype double (fx_u). With it other values have to be calculated also, which will be output of the sfunction in SIMULINK as well.

For that I have to convert the double to real_T, haven´t I? (real_T as output data type of a sfunction) How can I do that?

Code is something like:

for(i = 0; i <= limit; i++)
    {
        fx_u[i] = x0 + x1*u + x2*(u*u) + x3*(u*u*u) + x4*(u*u*u*u) + x5*(u*u*u*u*u);
        u = u+res;
    }
    x = &fx_u;      // <<--- I MEAN THIS LINE BECAUSE I GET A WARNING WHICH IS:

"warning: assignment from incompatible pointer type x = &fx_u;"

x is of data type real_T and fx_u is of data type double. x should be the output and fx_u is meant for further calculations.

In advance I thank you for your help. :)

Please don´t beat me, I am still a student.

[fus]

Did you ever find a solution for this? Running into the same problem and google is not being my friend

Answer 1

[Benjamin Thompson]

If x is a constant you cannot change it. You would need to supply a more complete example, it is hard to tell what you are trying to do.