POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

RE: POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

michael01 — Fri, 20 Feb 2026 15:28:52 GMT

Here is the working code for others trying to figure this out.
Its confusing b/c of mixed APIs

    nrf_drv_power_pofwarn_config_t config = { 
        .handler  = pof_handler, 
    };
    
    nrfx_power_pof_init(&config);
    sd_power_pof_threshold_set(NRF_POWER_THRESHOLD_V28);
    sd_power_pof_enable(true);

RE: POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

michael01 — Fri, 20 Feb 2026 15:14:32 GMT

Thanks Hung.

Based on your advice I saw nrf_drv_power.c has support for using pof with softdevice.
I added that, and configured.

    nrf_drv_power_pofwarn_config_t config = { 
        .handler  = pof_handler, 
        .thr = NRF_POWER_POFTHR_V27 
    };
    nrf_drv_power_pof_init(&config);

I was able to get the pof_handler to fire today, how ever I see in only supports 2.7v, 2.5v, 2.3v, 2.1v via nrf_drv_power.c, and I want to use 2.8v , so I think I'm going to pull all of this into my own application and stop using nrf_drv_power.c

RE: POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

Hung Bui — Fri, 20 Feb 2026 10:10:34 GMT

Hi Michael,
I assume sd_power_pof_* API worked for you. Let me know if you have further questions related to this.

RE: POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

michael01 — Thu, 19 Feb 2026 23:44:05 GMT

Thanks Hung. Yes I'm using softdevice. Very helpful thank you.

RE: POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

Hung Bui — Thu, 19 Feb 2026 12:56:49 GMT

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 ?

RE: POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

michael01 — Wed, 18 Feb 2026 23:21:02 GMT

Also tried the nrfx hal, same result

    nrfx_power_pofwarn_config_t pof_config;
    pof_config.thr = NRF_POWER_POFTHR_V28; // Set threshold to 2.7V
    pof_config.handler = &pof_handler;
    nrfx_power_pof_init(&pof_config);
    nrfx_power_pof_enable(&pof_config); // <- hard fault

RE: POFCON configuration causing hard fault in SDK 17.1.0 with nrf52832

michael01 — Wed, 18 Feb 2026 23:03:26 GMT

I tried enabling LFCLK as well, same result