LLPM on two NRF5340

RE: LLPM on two NRF5340

SamA — Thu, 17 Jun 2021 00:34:16 GMT

Thanks will push on sales end.

RE: LLPM on two NRF5340

Einar Thorsrud — Wed, 16 Jun 2021 14:29:37 GMT

Hi. There is no change yet, and LLPM is still not performing as well with the nRF5340 as with nRF52840. This will not change in the next nRF Connect SDK release. I cannot say when this will be improved (nor answer road map questions in general), so I recommend you contact the Nordic sales representative for your region if you need information about timelines.

RE: LLPM on two NRF5340

SamA — Wed, 16 Jun 2021 13:56:59 GMT

Hi Einar, there an update to this? May have to go with nrf52480 on the project if this is not a near term fix.

RE: LLPM on two NRF5340

Einar Thorsrud — Mon, 19 Apr 2021 10:33:10 GMT

Yes, I expect so. I is currently being worked on.

RE: LLPM on two NRF5340

SamA — Fri, 16 Apr 2021 19:17:02 GMT

Good to know, but it will eventually right?

RE: LLPM on two NRF5340

Einar Thorsrud — Fri, 16 Apr 2021 10:48:32 GMT

Hi,

It turns out that LLPM does not work properly on the nRF53 yet, and it is still unsupported. There are two workarounds you can use in the meantime though (one of them is enough):

Increase the interval to >= 2000 us
Run with the app on the network core

Edit: One more thing you can do when running a split configuration (host and controller on separate cores) it can help to disable QoS reports by commenting out these lines in the sample:

	if (enable_qos_conn_evt_report()) {
		printk("Enable LLPM QoS failed.\n");
		return;
	}

RE: LLPM on two NRF5340

SamA — Fri, 16 Apr 2021 05:22:16 GMT

I have opened and rebuild the hci_rpmsg project CONFIG_BT_CTLR_LLPM=y

New to the dual core system.

Are you suppose to flash the net core first with the hci_rpmsg project. then open the the llpm project and flash to the app core? (tried and failed also). Seems like the llpm project will erase the entire flash during llpm flashing.

Would the llpm project on it's on picks up the last compiled net core bin and flash to the net core as well?

Tried many approach. still can only do normal speed.. and not 1ms. Please help. Need to evaluate this for an up coming project.

RE: LLPM on two NRF5340

Einar Thorsrud — Thu, 15 Apr 2021 12:09:00 GMT

Hi,

Have you set CONFIG_BT_CTLR_LLPM=y in the prj.conf for the hci_rpmsg project as well (which is for the controller that runs on the network core)?