Zephyr - How to Change frequency.

[Neeraj Dhekale]

Hello,

I am using the nRF52840 DK board and writing code in Zephyr and I want to change the clock frequency. Currently, I guess by default it is 32.768KHz How can I change to a high-frequency clock (HFCLK), high-frequency 192 MHz clock (HFCLK192M)?

I have tried to set below in prj.conf file:

CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=32768

CONFIG_SYS_CLOCK_TICKS_PER_SEC=32768

But it seems that it is not accepting a value greater than 32768.

Thanks in advance

Thanks and regards,

[Neeraj Dhekale]

Hello,

I have tried to use nrfx_timer but it does not execute timer_handler callback function.

err = nrfx_timer_init(&m_timer, &timer_cfg, timer_handler);

Can anyone help me in this?

Thanks and regards,

Neeraj Dhekale

[haakonsh]

Why do you want to change the operating frequency of the Zephyr kernel? Is it related to your timer issue? 

For you timer issue: Have you enabled the timer's interrupt? Can you share the relevant code?

[Neeraj Dhekale]

Hello,

Timer's interrupt was not enabled. Also, it was not registered to IRQ_DIRECT_CONNECT().

Thank you so much.

haakonsh