Start and stop RTC with PORT events on a single pin

[haakonsh]

Hi, i'm wondering if it's possible to make a GPIO pin trigger different tasks when it is externally driven from low to high, and high to low.

I'm trying to stop an RTC timer when a pin goes high and start it again when it goes low, using PPI. Do i need to allocate two GPIOTE channels? And how do i get the different event adresses?

I'm on the nRF52, and i'm not using SD, I also don't want the high frequency clock running.

[Paul]

Yes, you can do this no problem. and you need to use GPIOTE. I guess you are capturing pulse width using RTC?

[Paul]

Probably in the next SDK release Nordic can remove this limitation? :-)