Relation RTC1 Compare / app_timer

RE: Relation RTC1 Compare / app_timer

Susheel Nuguru — Mon, 10 Dec 2018 12:57:46 GMT

Yes you are correct, nRF52810 has only two instances of RTC. I see your dilemma now.

You might have to upgrade to nRF52832 for that. You idea then using the PPI to connect the timer events to trigger SAADC samples sounds easy then.

RE: Relation RTC1 Compare / app_timer

Franz — Mon, 10 Dec 2018 11:57:25 GMT

Hi Susheel,

Ok - that´s what I feared.. well I would have to look for the specific revision ID of the chip, but as far as I can see form the datasheet, the nRF52810 only has RTC0 and RTC1, right? (I think only nRF52832 and upwards have RTC2)

Kind regards,

Franz

RE: Relation RTC1 Compare / app_timer

Susheel Nuguru — Mon, 10 Dec 2018 11:18:54 GMT

Theoretically yes, you can use it. But I would not recommend it as the behavior of the app_timer would change. Which chip revision are you using? can't you just use RTC2 instance for this?
Please see above, I do not thinking using another CC register of RTC1(app_timer) will fulfill your purpose of periodical trigger of SAADC sample without interfering with app_timer. Using another CC channel in RTC1 would still cause RTC1 interrupts confusing the app_timer a lot.