Restartig app_timer does not work with nRF52832 and SDK12.0.0

[Jarmo]

I am having an app_timer (nRF52832 / SDK12.0.0) that's interval must be changed during its lifetime. I am using following code to change the interval:

app_timer_stop(m_timer_id);
uint32_t interval = APP_TIMER_TICKS(interval_ms, APP_TIMER_PRESCALER);
app_timer_start(m_timer_id, interval, NULL);

So far so good, but what really happens is that I end up having a delay of a minute or so, before timer starts to fire interrupts again. This happens only when I change the interval. My target interval is from 10 to 100 ms.

Could there be a bug somewhere in the app_timer library code? With SDK8.0.0 and nRF51822 I did not have similar problem. My code is exactly the same.

[Susheel Nuguru]

Not sure what the problem is in your code. I tested app_timer with this example and it showed correct results

main.c

[Susheel Nuguru]

There is ofcourse possibility of mixing up with timers. Easy mistake is to use the same timer instance two times, then we get completely unexpected results. It is also possible to configure PPI to trigger timer tasks with other events. In you case if you are not using TIMER0 and if you are not not reconfiguring the timer you use and not using PPI around it, then i do not know what else is wrong. Like I said it will be much easier if you upload more code.