nRF5340 RNG peripheral

[WesC]

I am trying to figure out how to enable and use the RNG peripheral of the nRF5340.

since the RNG is on the Network side of the nRF5340.

is there anything i need to set in the prj.conf or in a kconfig to enable it?

do I just add Secure_Services.h

then make a call to spm_request_random_number() like in this link?

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/include/secure_services.html?highlight=random#c.spm_request_random_number

this is not for cryptocell C312  this is just a random number

thanks

[Vidar Berg]

Hello,

We actually have the nRF5340: nRF RPC Entropy sample that does exactly this. The application core uses the nRF RPC library to request/retreive RNG data from the net core.

Best regards,

Vidar

Edit: The sample application linked to above is only relevant if there is a particular requirement for the application core to use the RNG peripheral on the network core. Otherwise you should use the RNG built into the cc312 via the entropy driver: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/drivers/entropy/README.html

[WesC]

Wow seems more complicated than i would have thought.  I was looking at the peripheral registers and there is a start,stop,and value register.  i guess i just cant read the value register when valrdy is set?