Minimum softdevice initialization functions

RE: Minimum softdevice initialization functions

Jørgen Holmefjord — Fri, 27 Jan 2017 07:50:34 GMT

You can start the LF RC without initializing the softdevice. This is described in this post.

RE: Minimum softdevice initialization functions

bloobird0 — Thu, 26 Jan 2017 17:17:44 GMT

Edit: it looks like that app_timer uses the RTC. I don't have any 32kHz crystal on my board so I use the internal LFRC clock when configuring the softdevice. I may explain why my app_timer does not fire before initializing the softdevice.

RE: Minimum softdevice initialization functions

bloobird0 — Thu, 26 Jan 2017 16:51:54 GMT

Thanks, seems OK. Nevertheless I find that the app_timer does not fire anymore until the softdevice is initialized. Is App_timer softdevice-dependent?

RE: Minimum softdevice initialization functions

Jørgen Holmefjord — Thu, 26 Jan 2017 12:37:33 GMT

Hi,

As long as the softdevice is not enabled, you can use the registers directly to put the device into System off mode:

NRF_POWER->SYSTEMOFF = 1;

You can find some power-down examples on our GitHub page.

If the softdevice has been initialized, you will have to use the sd_power_system_off() function.

Best regards,

Jørgen