bt_le_ext_adv_update_param() and bt_le_ext_adv_start() processing time

[loquat]

I'm measuring the processing time of one-shot advertising.

system is nRF5340-DK and nRF52833-DK with nrf connect sdk.

simple processing sequence.
1. bt_le_ext_adv_create() only first
2. bt_le_ext_adv_update_param()
3. bt_le_ext_adv_set_data()
4. bt_le_ext_adv_start()
5. wait
6. goto (2.)

result
nRF5340-DK
(2) bt_le_ext_adv_update_param() processing time about 2.5ms
(4) bt_le_ext_adv_start() processing time about 2.5ms

nRF52833-DK
(2) bt_le_ext_adv_update_param() processing time about 500us
(4) bt_le_ext_adv_start() processing time about 500us

1. why processing time of nRF5340-DK is much longer than nRF52833-DK?
2. Both development boards have a long processing time. Is it possible to shorten it?

[Elfving]

Hello and sorry about the wait,

This difference is unexpected for me atleast.

I guess this nRF5340 is running hci_rpmsg on the netcore on nrf53, and bluetooth host on app core?

I would at least be curious to see how it looks on nrf53 if you run everything on netcore. Could you compile this for board nrf5340dk_nrf5340_cpunet and compare?

Regards,

Elfving

[loquat]

In order to do a similar test with netcore, I need to manipulate the GPIO (LED) with netcore.
I couldn't manipulate GPIO in the same way as appcore.
Please tell me how to operate it.

[Elfving]

I do not think I understand. You need to manipulate the led to test the one-shot advertising?

How are you doing the testing?

Regards,

Elfving

[loquat]

I I am testing with nRF5340-DK + PPK2. (connect LED1/LED2 to PPK2's Trigger)

My test program is,

1. bt_le_ext_adv_create() only first
2. LED_ON(1)
3. bt_le_ext_adv_update_param()
4. LED_OFF(1)
5. my short function
6. LED_ON(1)
7. bt_le_ext_adv_set_data()
8. LED_OFF(1)
9. LED_ON(2)
10. bt_le_ext_adv_start()
11. LED_OFF(2)
12. wait
13. goto (2.)

I need an LED because I'm using an LED output to measure the processing time.

[Elfving]

Hello again and sorry about the wait. There can be some delay here on DevZone during the summer holiday period.

loquat said:

I I am testing with nRF5340-DK + PPK2. (connect LED1/LED2 to PPK2's Trigger)

I see. You can forward these pins to the netcore using nrf-gpio-forwarder. See here.

Regards,

Elfving