How to call M file to Simulink model? - matlab

Question

I got a script from this link and it runs correctly in MATLAB. However, when I create a Simulink model, it runs normally, but I can get the data from m file.
MATLAB script:
function data = Loadcell()
eml.extrinsic('arduino','addon','read_HX711')
a = arduino('COM5','Mega2560','libraries','ExampleAddon/HX711');
while 1
LoadCell = addon(a, 'ExampleAddon/HX711',{'D2','D3'});
data = read_HX711(LoadCell)
end
end
Simulink function
function data = Loadcell()
coder.extrinsic('Loadcell');
Loadcell = zeros('double');
data = zeros('double');
data = Loadcell
end
I run Simulink in external mode using Arduino and I don't get the data from that code. How can I use that MATLAB script to use it in the Simulink block model and get the data?

Answer 1

It's most likely a couple of issues
naming your Embedded MATLAB function in Simulink the same as the MATLAB function. (How would you expect Simulink to know which function it's supposed to call? The MATLAB function, or re-entering the Embedded MATLAB function?)
defining Loadcell as an extrinsic function, then (re)defining it to be a double 0.0, then trying to execute it as a function.
I suspect you want something like,
function data = Loadcell_Wrapper()
coder.extrinsic('Loadcell');
data = zeros(1,1,'double');
data = Loadcell()
end
(Also, not part of your question, but isn't there an infinite loop in the MATLAB code?)