POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

Question

Hi!

I'm migrating some code from an 14.2.0 SDK to the 17.1.0 SDK and cleaning up a big mess.

Whenever I call nrf_power_pofcon_set(true, NRF_POWER_POFTHR_V27) with either true or false, I get a hard fault.
I read the docs, and I see HFCLK needs to be on. I enable it like this at wake up

    nrf_drv_clock_init();
    nrf_drv_clock_hfclk_request(NULL);
    while (!nrf_drv_clock_hfclk_is_running())
    {
    }

I confirm HFHCLK is running with SRC RC and STATE = 1 (running)
However when I try to call nrf_power_pofcon_set I am getting a hard fault.

I also printed these to RTT for a sanity check

<info> app: NRFX_CLOCK_ENABLED: 1
<info> app: NRFX_POWER_CLOCK_ENABLED: 1
<info> app: NRF_POWER_HAS_POFCON: 1
<info> app: NRF_POWER_HAS_VDDH: 0
<info> app: POWER_POFCON_THRESHOLD_Msk: 30

I have burned quite a few hours on this so any tips are appreciated. Thanks!

Hung Bui · Accepted Answer

Hi Michael, Have you tried to step into the code and check which exactly line that cause the hardfault ? 
 Do you use softdevice ? If you do you would need to use sd_power_pof_* API to access the Power registers. 
 Where do you call the function ? Have you tried to test with very simple application ?

POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

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