I would like to know the accuracy of the nrf51 timer.

RE: I would like to know the accuracy of the nrf51 timer.

tadanohito — Fri, 13 Aug 2021 01:03:47 GMT

I've checked.

#define CONFIG_SYS_CLOCK_TICKS_PER_SEC 32768

haakonsh — Thu, 12 Aug 2021 10:43:09 GMT

You can use menuconfig to view your kernel configurations.

Look for CONFIG_SYS_CLOCK_TICKS_PER_SEC, and clock sources and accuracies.

tadanohito — Thu, 05 Aug 2021 13:54:34 GMT

I don't know what it is and where to look for it. Here is the "kernel.h" file that contains the functions I used.devzone.nordicsemi.com/.../kernel.h

And this may be an off-the-wall answer, but in "system_nrf51.c", I set "#define __SYSTEM_CLOCK (32000000UL)".

haakonsh — Thu, 05 Aug 2021 11:43:54 GMT

What is your kernel clock configuration?

tadanohito — Thu, 05 Aug 2021 10:05:54 GMT

I don't know what it refers to, but the device used is nrf51. The SDK used is NCS1.6.0 and the count is obtained by "k_cycle_get_32()".

haakonsh — Thu, 05 Aug 2021 08:22:40 GMT

It depends on the accuracy of the clock source. What is your clock source?