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S-Function MAX6675 for Arduino MEGA2560

Asked by Tobias Winzel on 3 Jan 2018
Latest activity Commented on by Sofia Ricalde Sanchez on 16 Apr 2019
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

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3 Answers

Answer by Nick Sarnie on 5 Jan 2018

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.

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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

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Answer by Tobias Wzl on 19 Jan 2018

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

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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..!!

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Answer by wael ahmed on 29 Sep 2018

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?

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