S-Function MAX6675 for Arduino MEGA2560

Hello everyone,

since Christmas I'm desperately trying to create my own s-function block for a MAX6675 (I want to mease some temperatures). I have seen several Videos how to do it, the s-Function itself is successfully created but if I want to start my Model on my Arduino I'm always getting the same Error and I can't figure out why -.-

That's why I'm desperately looking for some help...

Thank you for your help :)

with best regards

Tobi

Answer 1

[Nick Sarnie]

Hi Tobi,

Based on the compiler errors and looking at the model, it looks like the custom code included in S-Function Builder is C++. S-Function Builder only supports the C language. I recommend modifying the custom code to work in C.

[Tobias Winzel]

Hey Nick,

thank you for your answer, I solved this Issue, but the next thing which appears that Simulink can't handle is the following line from my attached file:

"unrecognized mmcu atmega2560".... I I don't know what this means or how I can solve this new issue I'm having right now...

I've also attached my new SimulinkModel which belongs to the Error-file.

Do you or somebody else have some solution for me?

thank you for your help!!!!

Tobi

Answer 2

[Tobias Wzl]

I solved the whole problem!!! The pins from the IDE-Code have to be declared as parameters in the s-function block

the loop function has to be put in the OUTPUT-Writer and thats it

[Khan Md Shafi Ahad Siddique]

Hi Tobias,

I'm new in arduino and in need of reading some temperature data from MAX6675 from matlab. Can you please share with me how you created the matlab function. thanks in advance..!!

[Sofia Ricalde Sanchez]

Lograste hacerlo??

Answer 3

[wael ahmed]

Hi Tobias,

I have built the MAX6675 sFunction and it has no errors, I am working on getting data on external mode but it gives only a constant value on the scope despite the sensor being heated. Any idea what could be the problem?

[Luca Walther]

Hi Wael,

I tryed to use your Simulink block with my Arduino UNO. Did you solve the problem yet? Thanks vor sharing.