About timeslot, I want to ask something

RE: About timeslot, I want to ask something

user14926 — Mon, 23 May 2022 11:52:33 GMT

[quote user="eric_cheng"]I think I found the priority setting[/quote]

Yes, this is the priority of the timeslot request. It can be set to normal or high.

[quote user="eric_cheng"]This is to set the priority of BLE?[/quote]

The priority levels used by the softevice is predefined, and cannot be changed. The timing-critical events in the softdevice will always get highest priority. APP_BLE_OBSERVER_PRIO is the priority of the callback in your application where the softdevice events are passed. As the comment says, you should not need to change this priority.

[quote user="eric_cheng"]

The smaller the number, the higher the priority?

Is there a range of numbers? (maybe 0-3 or 0-5 or other ... ?)

[/quote]

Yes, that is correct. See the softdevice specification for details: Interrupt priority levels.

[quote user="eric_cheng"]

My project will switch ESB frequently_ TX and ESB_ RX

Does switching take a little processing time

Cause some radio data can't be received in time?

[/quote]

The timing of the radio is given in the RADIO peripheral documentation: Radio timing

RE: About timeslot, I want to ask something

user115209 — Thu, 19 May 2022 03:42:27 GMT

Hi,

Thank you for your reply

I think I found the priority setting

m_timeslot_request.params.earliest.priority    = NRF_RADIO_PRIORITY_NORMAL; // or NRF_RADIO_PRIORITY_HIGH

In examples \ ble_peripheral \ ble_app_uart

#define APP_BLE_OBSERVER_PRIO           3                                           /**< Application's BLE observer priority. You shouldn't need to modify this value. */

This is to set the priority of BLE?

The smaller the number, the higher the priority?

Is there a range of numbers? (maybe 0-3 or 0-5 or other ... ?)

=====================================================

I want to ask a question

My project will switch ESB frequently_ TX and ESB_ RX

Does switching take a little processing time

Cause some radio data can't be received in time?

Thank you

RE: About timeslot, I want to ask something

user14926 — Wed, 18 May 2022 13:36:30 GMT

Hi,

1) Yes, the sessions are like init and uninit of the timeslots.

2) Yes, the range for one request is 100us-100ms, but you can request to extend the timeslot up to 128s. See Timeslot length.

3) No, the SoftDevice scheduler will only grant the timeslot request if the timeslot can be scheduled between other tasks, see Scheduling and SoftDevice timing-activities and priorities.

Best regards,
Jørgen