Is softdevice doing anything when ADV is disabled?

RE: Is softdevice doing anything when ADV is disabled?

Hung Bui — Tue, 24 Apr 2018 14:27:11 GMT

You can test if the softdevice preempt your application by simply flipping a GPIO pin in your task routine or in main loop. Then can use a logic analyzer to check if there is any period that the pin flipping get preempted (flat). Make sure you don't have interrupts from other peripherals.

RE: Is softdevice doing anything when ADV is disabled?

Al Bundy — Tue, 24 Apr 2018 08:26:32 GMT

Yes, I use crystal.

RE: Is softdevice doing anything when ADV is disabled?

Hung Bui — Tue, 24 Apr 2018 08:13:35 GMT

As far as I know, if you are not in a connection, not doing any advertising, then the only possible activity of the softdevice is to calibrate the 32kHz RC. If you don't use RC but using crystal, I think you are safe.

Some alternatives are to use timeslot API, or to temporarily disable the softdevice and then enable it again.