Upto 6 frequency measurement through GPIOs

RE: Upto 6 frequency measurement through GPIOs

Sigurd — Wed, 12 Feb 2025 00:16:23 GMT

[quote user="frogrammer"]But switching between GPIOs i can take a look. So, in the program above do i just loop between PIN numbers?[/quote]

Correct

RE: Upto 6 frequency measurement through GPIOs

frogrammer — Tue, 28 Jan 2025 11:51:26 GMT

It is a RC oscillator with Schmitt triggered output measuring changes in Capacitance. And the capacitance could vary or could stay stable depending on some external influence.

RE: Upto 6 frequency measurement through GPIOs

Sigurd — Tue, 28 Jan 2025 11:47:39 GMT

[quote user="frogrammer"]My first target is to measure concurrently. because changes are instant and need to catch that. It might get lost during switching to another GPIO. [/quote]

How often does the frequencies changes?

RE: Upto 6 frequency measurement through GPIOs

frogrammer — Mon, 27 Jan 2025 23:46:26 GMT

My first target is to measure concurrently. because changes are instant and need to catch that. It might get lost during switching to another GPIO.

But switching between GPIOs i can take a look. So, in the program above do i just loop between PIN numbers? or what is the best way you suggest?

RE: Upto 6 frequency measurement through GPIOs

Sigurd — Mon, 27 Jan 2025 21:33:08 GMT

Do you need to it concurrently? Or could you e.g. measure the frequency for x amount of time on pin 1, then switch to the next pin, measure for x amount of time, switch to next pin, etc, etc

RE: Upto 6 frequency measurement through GPIOs

frogrammer — Mon, 27 Jan 2025 20:53:13 GMT

Ok got it. Is there any work around to have 6 frequencies measured? I wanted to stick to nRF5340 solely.

RE: Upto 6 frequency measurement through GPIOs

Sigurd — Mon, 27 Jan 2025 20:27:36 GMT

Hi!

[quote user=""]Meaning, there is only one counter per timer which is my TIMER0 ''NRF_TIMER_TASK_COUNT''[/quote]

Correct. In Counter mode, the TIMER's internal Counter register is incremented by one each time the COUNT task is triggered.

The app core have 3 timer instances. TIMER0, TIMER1, TIMER2

There are also 3 timer instances in the network core, but when you use Bluetooth, then 2 of these are reserved and used by the Bluetooth stack.

https://docs.nordicsemi.com/bundle/ps_nrf5340/page/timer.html#d1873e184