matlab embedded fuction in simulink

I have used an m file named('XSteam.m') and I wanted to make a simulink model from this m file then I have made the embedded function code as the following

function [t,p,h,hv,hl,v,v_v,vl,s,sv,sl,u,uv,ul,x] = fcn(t1,p1,h1,v1,s1,u1,x1)
%#eml
eml.extrinsic('XSteam')
coder.extrinsic('XSteam');
if ((t1==0)&& (h1==0)&& (v1==0)&& (s1==0)&& (u1==0)&&(x1==0));
    t=XSteam('Tsat_p',p1);
    p=0;
    hv=XSteam('hV_p',p1);
    hl=XSteam('hL_p',p1);
    v_v=XSteam('vV_p',p1);
    vl=XSteam('vL_p',p1);
    sv=XSteam('sV_p',p1);
    sl=XSteam('sL_p',p1);
    uv=XSteam('uV_p',p1);
    ul=XSteam('uL_p',p1);
    h=0;
    u=0;
    s=0;v=0;x=0;
elseif ((p1==0)&&(h1==0)&&(v1==0)&&(s1==0)&&(u1==0)&&(x1==0));
     p=XSteam('psat_T',t1);
    hv=XSteam('hV_T',t1);
    hl=XSteam('hL_T',t1);
    v_v=XSteam('vV_T',t1);
    vl=XSteam('vL_T',t1);
    sv=XSteam('sV_T',t1);
    sl=XSteam('sL_T',t1);
    uv=XSteam('uV_T',t1);
    ul=XSteam('uL_T',t1);
    t=0;
    h=0;u=0;s=0;v=0;
elseif ((h1==0)&&(v1==0)&&(s1==0)&&(u1==0)&&(x1==0));
    h=XSteam('h_pT',p1,t1);
    s=XSteam('s_pT',p1,t1);
    v=XSteam('v_pT',p1,t1);
    u=XSteam('u_pT',p1,t1);
    p=0;ul=0;uv=0;sl=0;sv=0;v_v=0;vl=0;hv=0;hl=0;x=0;
    t=0;
elseif ((t1==0)&&(h1==0)&&(v1==0)&&(u1==0)&&(x1==0));
    x=XSteam('x_ps',p1,s1);
     u=XSteam('u_ps',p1,s1);
     v=XSteam('v_ps',p1,s1);
     t=XSteam('T_ps',p1,s1);
     p=0;
     s=0;ul=0;uv=0;sl=0;sv=0;v_v=0;vl=0;hv=0;hl=0;
elseif ((t1==0)&&(v1==0)&&(s1==0)&&(u1==0)&&(x1==0))
    t=XSteam('T_ph',p1,h1);
     v=XSteam('v_ph',p1,h1);
      s=XSteam('s_ph',p1,h1);
      u=XSteam('u_ph',p1,h1);
      x=XSteam('x_ph',p1,h1);
      p=0;
      h=0;ul=0;uv=0;sl=0;sv=0;v_v=0;vl=0;hv=0;hl=0;
elseif ((t1==0)&&(v1==0)&&(u1==0)&&(p1==0)&&(x1==0))
    t=XSteam('T_hs',h1,s1);
    p=XSteam('p_hs',h1,s1);
    h=0;s=0;ul=0;uv=0;sl=0;sv=0;v_v=0;vl=0;hv=0;hl=0;x=0;
else
    h=XSteam('h_px',p1,x1);
    u=0;s=0;p=0;x=0;ul=0;uv=0;sl=0;sv=0;v_v=0;vl=0;hv=0;hl=0;

end

then the model didn't work

and error messages appeared

I don't know the reasons for that because I am beginner in Simulink

If any one Can help me I will be grateful

[Merged information from duplicate question]

but when I run the model some errors display ""Sampled update was specified and no sample time was entered in chart Embedded MATLAB Function (#18)""

and ""Error reported by S-function 'sf_sfun' in 'steam/Embedded MATLAB Function/ SFunction ': Stateflow Suppress Error.""

[TAB]

First of all your code is not readable at all.

Please format the code properly and specify which errors you are getting?

Answer 1

[Mike Hosea]

I don't know anything about XSteam, but whenever you use an extrinsic function call, you need to pre-declare the output so that the compiler knows what the data type coming back from MATLAB is supposed to be before the model runs. Delete the eml.extrinsic line and keep the coder.extrinsic. Now, before any calls to XSteam, make sure the return variable is properly defined already. For example, if XSteam('T_ph',pl,hl) returns a 3-by-1 vector that is a 'uint8', then we should see

t = zeros(3,1,'uint8');
t = XSteam('T_ph',pl,hl);

It looks redundant, but that's how you do it, and the compiler knows better than to actually do both assignments. The first assignment just tells it that the data coming back from the extrinsic call is a 3-by-1 vector of 'uint8'. Of course you don't have to repeat the declarations in each case--you can collect them into one set at the top, before the if/elseif/elseif/.../else/end section.

You may have trouble with Simulink if any of the return types are different depending on which case is used. Make sure all the outputs are always the same class, size, and complexity (i.e., real or complex).

[Ahmed Tolba]

but I am still having error

??? Error using ==> sf

Sampled update was specified and no sample time was entered in

chart Embedded

MATLAB Function (#18)

how can overcome this problem

[Kaustubha Govind]

Strange error for an Embedded MATLAB Function block. I'm not sure if this is a legitimate error - try reporting this to MathWorks Tech Support and see if they are able to provide a resolution?

Answer 2

[Tianji Li]

Hi Ahmed Tolba,

you should input the "Sample time" or just change "Update method" to "Inherited".

You can find them in "Model Exploer".