Timer accuracy for micro seconds

[MaximSh]

Hi,

i defined timer 

K_TIMER_DEFINE(my_timer, my_timer_handler, NULL);

then i am starting  the timer with configuration :

k_timer_start(&my_timer, K_USEC(500), K_USEC(500));

The issue that the 

the handler prints log every 581.5 us instead of 500.

What can be the reason?or how to trigger some handler every 500 us

Thanks

[Susheel Nuguru]

I thought the k_timer resolution is in milliseconds and not micro seconds. Need to look into the code to see if microseconds are also supported

[MaximSh]

i think it converts time to ticks 

[Susheel Nuguru]

Are you using SyTick as kernel timer? on nRF the default should be RTC to be low power capable and the tick resolution I assumed to be 1ms.

[MaximSh]

i didn't change configurations

[Susheel Nuguru]

The resolution of the kernel timers depend on which clock you are using. We are using RTC on nRF and the configuration CONFIG_SYS_CLOCK_TICKS_PER_SEC is set to 32768 in our samples. 

You should not use k_timer for creating timeouts less than the resolution of the system timer.