How to print out the current CPU clock in Zephyr OS?

[MasterKeyxda]

I am looking to print out the current system clock in MHz or Hz using the printf() function. Is there a way I can get the information?

[ldomaigne]

Hi,

If I understand your question correctly, you could get the CPU clock speed in Hz, KHz or MHz using the function k_xxx_to_cyc_floor32 from time_unit.h (or the floor64 variant if you prefer 64 bits integer):

#include <kernel/sys/time_units.h>
k_sec_to_cyc_floor32(1); // 1sec to #cycle => Hz
k_ms_to_cyc_floor32(1);  // 1ms to # cycle => kHz
k_us_to_cyc_floor32(1);  // 1us to # cycle => MHz 

[MasterKeyxda]

I'll try that tonight. You understood my question correctly.