How to configure peripheral to use HFXO exclusively in NRF Connect SDK

[edmcnicholas]

I am looking as using pwm and timers and trying to get them to use the HFXO rather then the internal RC as I need the higher accuracy.  I know how to start it using the below code to start the clock but the issue seems to be with another peripheral turning it off which I would guess is the BLE radio as this is likely done through PPI. 

What I need is some way to tell the peripheral to exclusively use the HFXO and disable it being turned off while that peripheral is running.  Any help would be appreciated.

NRF_CLOCK->TASKS_HFCLKSTART = 1;

// Wait for clock to start

while(NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);

Thanks,

Ed

[edmcnicholas]

is there an nrf connect equivalent for this.  The current code looks to be missing a counting semaphore to be able to override the radio turning off the hfxo

sd_clock_hfclk_request();

        while (!is_running) {

                sd_clock_hfclk_is_running(&is_running);

            }

[edmcnicholas]

After digging I think this is the right api call can someone confirm.

nrfx_clock_hfclk_start();

        while(nrfx_clock_hfclk_is_running() == false);