Write to Arduino Analog pins from Simulink

Question

mahdi Babayi semiromi 2021-10-21

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https://ww2.mathworks.cn/matlabcentral/answers/1568638-write-to-arduino-analog-pins-from-simulink

回答： Neelanshu 2024-5-7

I'm trying build and deploy simulink models to Arduino Uno using the "Simulink support package for Arduino hardware". I need to change the pin mode of pin "A0" to output and wirte to it. I know it's possible using the "Matlab support package" but the "Digital Output" block in the Simulink package doesn't seem to accept anything other than an integer between 0-13 for pin number.

If it's impossible, any hacks would be welcome (like calling the matlab function from Simulink etc. )

Thanks in advance for your answers

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Answer 1

Neelanshu 2024-5-7

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https://ww2.mathworks.cn/matlabcentral/answers/1568638-write-to-arduino-analog-pins-from-simulink#answer_1453706

Hi mahdi,

The digital output block can only handle the digital output pins (0-13). Any value greater than 13, representing A0-A5, will throw an error.

You may use the "S-function Builder" block that interprets the Arduino IDE Code to S-function as a workaround.

In the editor window of S-Function builder add the necessary Arduino libraries and C++ S-function libraries under ‘libraries’ tab.
In the ‘Ports and Parameters’ tab, under ‘Input ports’ add the required inputs and outputs under ‘Output ports’ .
Map the logic from Arduino IDE to following methods of s-function :
"<system_name>_Start_wrapper" & "<system_name>_Terminate_wrapper" - Allocate and deallocate memory at the start and the end of simulation.
"<system_name>_Outputs_wrapper" - Enter the code that computes the outputs of the S-function at each simulation time step.
"<system_name>_Update_wrapper" - Enter the code that computes the value of discrete states at the next time step using the values at the current time step.