radio off notification and relationship to distance.

[archangel689]

The radio notification tutorial (devzone.nordicsemi.com/.../) says:

"The distance is the time window before/after the radio goes active. The radio events are radio_on and radio_off, e.g. a notification distance of 800µs corresponds to a radio notification event 800µs before the radio goes active, and another event right after the radio has gone inactive."

Does this mean that a radio inactive notification occurs 800µs after the radio goes inactive? It seems that a lot of times if you add 800µs to the time of the radio-on notification, and subtract 800µs from the radio-off notification the adjusted radio off notification time will be earlier than the adjusted radio active time.

[Øyvind]

The INACTIVE notification is right after the radio goes inactive, regardless of the notification distance configured. In other words, the notification distance only applies to the ACTIVE signal, if enabled.

Note that the timings (ACTIVE notification distance, the phrase "right after the radio goes inactive") refers to the instance where the software interrupt is set pending. The time you observe that the interrupt handler is executing may vary depending on the CPU activity at the different priority levels.

Hope this makes things clearer.

[archangel689]

Thank you!