Why doesn't Timer interrupt operate at the interval which is configured in code?

RE: Why doesn't Timer interrupt operate at the interval which is configured in code?

Yusuke — Mon, 08 Apr 2019 16:14:58 GMT

I see. So nRF9160 may have the same issue in low frequency timer as nRF51 has. Ok, I will wait for next update.

RE: Why doesn't Timer interrupt operate at the interval which is configured in code?

Bjørn Kvaale — Fri, 05 Apr 2019 12:34:51 GMT

This may be related to this bug reported here.

RE: Why doesn't Timer interrupt operate at the interval which is configured in code?

Yusuke — Wed, 03 Apr 2019 15:25:10 GMT

Hi, Bjørn

I've already checked the timer example. It's a timer delay example, not timer interrupt example.

In my case, an interrupt interval is long, like 1 sec, so It's better to use kernel timers instead (RTC based)

Please read my previous post here

https://devzone.nordicsemi.com/f/nordic-q-a/45200/how-to-implement-timer-interrupt-in-nrf9160

RE: Why doesn't Timer interrupt operate at the interval which is configured in code?

Bjørn Kvaale — Wed, 03 Apr 2019 12:34:32 GMT

There is a timer example here that may help you. You could either try copying some of the code into your secure_boot implementation or download the user's branch of the nrf folder (will most likely require the master branch of nrfxlib, mcuboot & zephyr). You could create a new ncs folder called ncs_master & then clone Rallare's nrf branch, along with the master branches of the other three folders mentioned.

RE: Why doesn't Timer interrupt operate at the interval which is configured in code?

Yusuke — Tue, 02 Apr 2019 14:40:59 GMT

Thank you for your reply! This is what I did.

1. I copied secure_boot example and change the folder name as well as some file names.
secure_boot(folder) -> timer_interrupt
secure_boot.emProject -> timer_interrupt.emProject
secure_boot.emSession -> timer_interrupt.emSession

2. implement the code above by myself.

RE: Why doesn't Timer interrupt operate at the interval which is configured in code?

Bjørn Kvaale — Tue, 02 Apr 2019 14:10:16 GMT

Sorry for the delayed response. Have you taken this code from a specific example (if yes, where is the code location?) or have you written it yourself?