Counting Square Wave Pulses on nRF5340 Using Zephyr and GPIOTE

[Stefano1984]

Hello everyone,

I have an nRF5340 microcontroller (NORA B106 module), and I want to connect a square wave signal to one of its pins to read its frequency or count the number of rising edges per second. I understand that I need to use a timer in "Event Counter Mode." I believe I also need to use the GPIOTE module, correct?

Could someone assist me with this?

I'm using the Zephyr operating system with nRF Connect SDK v2.9.0.

Thank you.

[Priyanka]

Hi,

That's right. You would need to use the GPIOTE module to generate events on rising edges, and it would be good to use the PPI to connect the generated GPIOTE events directly to the TIMER, so that with each rising edge the counter is incremented.

You can refer this discussion.

Regards,

Priyanka