nrf_pwr_mgmt_shutdown() fails while debugging.

RE: nrf_pwr_mgmt_shutdown() fails while debugging.

haakonsh — Tue, 15 Oct 2019 12:07:20 GMT

yes, it's fixed in SDK 16.0.0 :)

RE: nrf_pwr_mgmt_shutdown() fails while debugging.

Eliot Stock — Sun, 22 Sep 2019 07:34:29 GMT

Will this be fixed in SDK 16.0.0? Seems a bad bug. If nrf_pwr_mgmt_shutdown() returned an error code we could just handle this in application code.

RE: nrf_pwr_mgmt_shutdown() fails while debugging.

haakonsh — Tue, 20 Aug 2019 10:03:48 GMT

I won't get fixed in the SoftDevice so the power management library should have handled that, but it does not. You'll want to use an ifdef for debug mode though:

/* Solution for simulated System OFF in debug mode */

        // Enter System OFF.
#ifdef SOFTDEVICE_PRESENT
        if (nrf_sdh_is_enabled())
        {
            ret_code_t ret_code = sd_power_system_off();
#ifdef DEBUG
            while(true)
            {
                __WFE;
            } 
#else
            ASSERT((ret_code == NRF_SUCCESS) || (ret_code == NRF_ERROR_SOFTDEVICE_NOT_ENABLED));
#endif
            UNUSED_VARIABLE(ret_code);
        }
#endif // SOFTDEVICE_PRESENT
        nrf_power_system_off();

RE: nrf_pwr_mgmt_shutdown() fails while debugging.

nrbrook — Mon, 19 Aug 2019 13:15:06 GMT

Surely this is still incorrect behaviour in nrf_pwr_mgmt_shutdown though – it should have a while(1) after the call to sd_power_system_off as nrf_power_system_off does:

/* Solution for simulated System OFF in debug mode */
while (true)
{
    __WFE();
}

Seems like a bug?

RE: nrf_pwr_mgmt_shutdown() fails while debugging.

haakonsh — Wed, 22 May 2019 08:14:37 GMT

Yeah, it's called "emulated shutdown". If the MCU goes into SystemOFF mode with a debugger attached then the DAP - Debug access port will also shut down and you will exit whatever debugging session you're in. This is not really conducive to debugging so we emulated the shutdown, either by putting the system into SystemON Idle mode , holding the CPU in an infinite loop, or stopping the CPU.

Try compiling without the DEBUG flags, in SES you can use the "release" build environment.