RE: Raw radio access in MCUBoot which is based on Zephyr causes strang behavior

summer — Mon, 10 Jun 2019 02:55:44 GMT

Problem solved! Thank you!

RE: Raw radio access in MCUBoot which is based on Zephyr causes strang behavior

Joakim Andersson — Thu, 06 Jun 2019 13:49:02 GMT

You should request the HFCLK through the clock subsystem API. When you are using the RC oscillator as your LF, it needs to calibrate periodically from the HFCLK, when it has finished this it will turn the HFCLK off if no-one else is using it.
So in other words, you need to register yourself as a user of the HFCLK.

Replace this with a call to clock control driver:
void hal_clock_hfclk_enable(void)
{
NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
NRF_CLOCK->TASKS_HFCLKSTART = 1;
while( NRF_CLOCK->EVENTS_HFCLKSTARTED == 0 );
}

err = clock_control_on(device_get_binding(DT_NORDIC_NRF_CLOCK_0_LABEL "_16M");, (void *)1);