Input Capture Block Error on Supported Pin in Simulink

I'm encountering an issue with the Input Capture block in Simulink when attempting to change the pin number for input capture functionality. Despite selecting pins that are listed as supported in the pin map, I receive the following error message:

"Input capture functionality is not supported on the selected pin. Please click the 'view pin map' button to open the list of pins supported for input capture."

This issue persists even though I am using the exact pins designated for input capture in the pin map. I've verified this on several different devices, all running MATLAB 2024b, but the error remains consistent.

I've also ensured that the software and support packages are up-to-date. Has anyone else experienced this issue, or does anyone have suggestions for troubleshooting?

[Abhinav Aravindan]

Hi @Laith, can you provide details on the board you are using and the Pin numbers ?

[Laith]

Hi @Abhinav Aravindan, my current hardware implementation is in ESP32 but the problem arises before build (on pin selection) I also tried Arduino mega settings and the same error occurred upon pin selection.

[Saurabh]

Hi @Laith,

Would it be possible for you to share the pin configuration that is been provided to the 'Input capture' Block Parameter and the and Target Hardware.

Thankyou.

[Laith]

Hi @Saurabh, I have the following configuration:

[Saurabh]

Hi @Laith

As per the documentation the Input Capture is not supported for ESP32-WROOM(Arduino Compatible) as of now.

The same information can be found here:

https://www.mathworks.com/help/releases/R2024b/simulink/supportpkg/arduino_ug/pin-mapping-for-arduino-timer-dependent-blocks.html

Thank You.

[Laith]

Hello @Saurabh,

Thanks for the info and the link!

I also tried using an Arduino Mega 2560, but I'm still getting an error saying input capture isn’t supported on the selected pin (screenshot attached). Is there a workaround or specific setting for this, or is input capture limited on multiple boards?

Answer 1

[Kautuk Raj]

I understand that you encountered an error when you tried to set the pin in the "Input Capture" block in a Simulink model, where the hardware implementation is set to "ESP32-WROOM (Arduino Compatible)".

This error occurs because the ESP32 hardware implementation does not support any pin for the "Input Capture" block. The pin map indicates that only PWM blocks support pins in the ESP32 hardware implementation, which you can also find at the following MathWorks documentation page: https://www.mathworks.com/help/releases/R2024b/simulink/supportpkg/arduino_ug/pin-mapping-for-arduino-timer-dependent-blocks.html

From the comments, I can see that you also tried using an Arduino Mega 2560, but are still getting an error stating that input capture isn’t supported on the selected pin. I was able to reproduce this issue.

The pin map in the documentation page below indicates that only pins 48 and 49 are supported for the "Input Capture" block, with the hardware implementation set to "Arduino Mega 2560". However, the section below that addresses "Conflicting Pin Configurations on Arduino Timer" says that "Arduino Pin Connections for Input Capture Block" can be 2, 3 and 5 for Timer 3: https://www.mathworks.com/help/releases/R2024b/simulink/supportpkg/arduino_ug/pin-mapping-for-arduino-timer-dependent-blocks.html

I think this is a typo error on the page wherein the columns for Timers 1 and 3 got interchanged for Input Capture and PWM. It should be N/A for Input Capture for Timers 1 and 3.

You can try using pin 48 or 49 to see if it resolves the issue for you, it worked for me.