pass Function block parameter as C define string

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mate 2013-4-22

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https://ww2.mathworks.cn/matlabcentral/answers/73053-pass-function-block-parameter-as-c-define-string

编辑： BhaTTa 2025-4-17

Hello, Is there any way to add a function block parameter as C define string.

For example I have Digital IO write function block which calls a c function inside. It have one Inpput: this value will be written to the pin. And two parameter:the port name , the pin number The port name should be a C define macro like

#define gioPORTA ((gioPORT_t *)0xFFF7BC34U)

and I want to set the function block parameters to gioPORTA , 1 to set the digital io port (PORTA ,1) to 1.

Thank you in advance Best Regards, Mate

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Answer 1

BhaTTa 2025-4-17

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https://ww2.mathworks.cn/matlabcentral/answers/73053-pass-function-block-parameter-as-c-define-string#answer_1563789

编辑：BhaTTa 2025-4-17

Hey @mate, you can create a header file which has C macros defined and that can be included in your Simulink model. Then to model your system and call appropriate C function you can use any of the below technoloigy:

C function block: https://www.mathworks.com/help/simulink/slref/cfunction.html

MATLAB System object: https://www.mathworks.com/help/matlab/create-system-objects.html

additional references:

https://www.mathworks.com/help/simulink/supportpkg/arduino_ref/dht11-relative-humidity-temperature-io-device-builder.html

https://www.mathworks.com/help/simulink/slref/coder.ceval.html