nRF5340 - real-time time capture

[Gabriele]

Hi,
on nRF5340 I want to capture accurate timing of external events.
I need a kind of real-time capture module to read the time period of a pulse train generated by a rotating turbine.
The minimum period is 200 us. The time resolution of 10-20 us is acceptable.
Is there a suitable HW peripheral I can use on nRF5340 to do the job efficiently ?

Best Regards

[Gabriele]

Hi,
I think nRF5340’s QDEC peripheral could be great to solve my problem.
From link
I see Zephyr manages the quadrature decoder.

The next question is how to activate it under NCS 1.5.1 ?
I’ve enabled CONFIG_QDEC_NRFX in prj.conf, and put the following definition in dts overlay

&qdec {
    status = "okay";
    a-pin = <3>;
    b-pin = <28>;
    enable-pin = <30>;
    led-pin = <0xFFFFFFFF>;
    led-pre = <0>;
    steps = <24>;
};

Build fails in parsing the input tree.
From link
I read nRF5340 is not listed among the SoC allowed to enable HAS_HW_NRF_QDEC.

Is there a way to use QDEC on nRF5340 ?