Read rotary encoder from Arduino Uno in Simulink

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Apostolos Vrontos
Apostolos Vrontos 2020-3-20
评论： Omer Faruk 2022-5-19
Hello,
I can easily read the counts in Matlab (like this: https://de.mathworks.com/help/supportpkg/arduinoio/ug/control-rotary-encoder-knob.html), but not in Sumulink! Can someone tell me how it is the correct way to read the counts in real-time in Simulink?
Thanks

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Pranav Murali
Pranav Murali 2020-3-23
I understand that you are trying to read the counts from a rotary encoder using Simulink. Although Simulink doesn't have a block to interface a rotary encoder at present, it can possibly be achieved in two ways:
  1. Write your code on MATLAB and import the function as a Simulink block. See how that is done here.
  2. Attach External Interrupt block to pins 2 and 3 to call an Interrupt Service Routine (ISR) function. The ISR will then perform bitwise comparison of the two inputs to increment/decrement the counts.
The idea behind the second approach is to implement the rotaryEncoder function through existing Simulink blocks.
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Azlin Afiqah
Azlin Afiqah 2021-8-9
@Phan Du Thank you so much. I really really appreciate that. Thank you so much <3
Ghani Lawal
Ghani Lawal 2022-2-18
If one doesn't care about the direction of the motor, can one just attach the External Interrupt to call the ISR when the signal at PIN 2 goes from LOW o HIGH?
Note: http://www.creative-robotics.com/quadrature-intro is a broken link

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更多回答（3 个）

Hasan Falah
Hasan Falah 2020-6-30
Hello friends,
I’m using arduino Due to read incremental rotary encoder by simulink, there is no block in sinulink to do that.
I tried with external interrupt example in matlab 2020a but it is reading only in one direction and just increasing, so it should be readings in clockwise and counterclockwise.
Aslo I tried with encoder S-Function in Device Driver examples but also does not work.
Your help please .....
Thanks
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Harshil Jani
Harshil Jani 2021-3-29
Hi Yago menezes, If you are able to use it using simulink please send me to harshiljani008@gmail.com
Anass Dkheila
Anass Dkheila 2021-9-21
Hello Hasan did you solve this problem? if you did can you send it to me at againstmarz@gmail.com

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Daniel Velazquez
Daniel Velazquez 2021-7-5
Hi, thanks for the encoder part.
Attached is a preliminary implementation of a PID Speed Controller for a DC motor with encoder.
The circuit is a low side FET to the pin 5 of the ATMEGA (PWM output) and pins 2 and 3 go to the encoders as input.
The PID parameters and scopes are tuneable.
Saludos
Daniel Velazquez
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Azlin Afiqah
Azlin Afiqah 2021-8-4
Hi, can you give me the block diagram in version R2014a. Thank you. I'm helpless doing this project. I really really appreciate your support. Thank you again

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Daniel Velazquez
Daniel Velazquez 2021-8-6
Hello Azlin, unfortunately I do not have R2014a but you can easily redraw it in your version from the image attached of the Simulink diagram.
Have fun
Daniel
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mechali omar
mechali omar 2021-10-21
编辑：mechali omar 2021-10-21
Hola, Hello Daniel Velazquez
Thank you for providing these useful files.
May I kindly ask you to provide a small clirification about some blocs in the encoder function.
1- for the gain 60/485. Why we exactly need to choose these values. Are thery related to the encoder type, or they remain valid for any other encoder.
2- for the bloc with gain of 0.1. What is the role of this bloc with exactly 0.1 gain.
3- How to change the sampling time of the S-Function block "Ts".It remains always 0.1 even we have changed it in the workspace.
GRACIAS
Omer Faruk
Omer Faruk 2022-5-19
Daniel could you explain how we obtain response curve?

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