NRF_POWER->GPREGRET

[Noxstella]

 The first time  I download  the program to my device , it will cause a crash when I try to set NRF_POWER->GPREGRET for OTA purpose;

However after  restarting my device,  and I try to set NRF_POWER->GPREGRET again, it will work well;

So what may cause this situation?

[Vidar Berg]

Hello,

Is the Softdevice enabled when you try to set NRF_POWER->GPREGRET. In that case, you will not have access to write to the register directly as the Softdevice reserves access to this peripheral. Instead you must use the Softdevice sd_power_gpregret_set() function.

Best regards,

Vidar