retriggerable timer

[JimK]

I'm using the app_timer library to create one shot timer. I'm calling the app_timer_start() to the same timer repeatedly in the gpiote handler. I had thought that this would restart the timer but it doesn't seem to work.

The timer event fires N seconds after the FIRST gpiote event. I'm want to wait N seconds after the LAST gpiote event has fired.

Is there a way to reset a time that is already started?

Is there another function I should  use?

[haakonsh]

Yeah, use the RTC2 instance with its RTC driver and RTC HAL. Set up a compare event that will trigger an interrupt after N seconds.

You can use the PPI — Programmable peripheral interconnect system to connect the GPIOTE's IN_EVENT to the RTC's START task. 

What is it that you're going to use this timer for, is it to run som SW or to trigger another HW peripheral task?
If it's the latter then you can again use PPI to connect the RTC's COMPARE event to any other peripheral's task, like starting an SPI transaction N seconds after a GPIO pin has been toggled. 

[JimK]

In this case we will trigger a SW module from the timer. Thanks for your help