Using RNG with SoftDevice disabled

[ImQ009]

I have my devices programmed in a way, that they decide whether to enable SD and transmit via BLE or to keep it disabled and start operating using Gazell. In this case I need SD to be disabled and use RNG. Can I do it?

Thanks in advance.

[Susheel Nuguru]

YES :) Softdevice disable will mark all peripherals as unprotected, you can just consider that it doesn't exist except that it takes space in flash

[ImQ009]

I see, so I have to access the registers directly? Thanks

[Susheel Nuguru]

Yes, when you disable stack, you cannot use its API anymore. Few exceptions, the ones defined in nrf_sdm.h and everything that is below SOC_SVC_BASE_NOT_AVAILABLE enum in nrf_soc.h. The exception in these is that they are used to enable/disable softdevice and some flash operations.