Channel Selection Algorithms in nRF52840DK

[BOZHENG]

Hi All

I am now working on Channel Selection Algorithms in nRF52840DK by Zephyr. For right now, the choice between Channel Selection Algorithm 1 and 2 could be made by me (by setting kconfig parameters:

CONFIG_BT_CTLR_ADV_EXT=n
CONFIG_BT_CTLR_CHAN_SEL_2=n

I found some files about Channel Selection Algorithms in Zephyr (zephyr/subsys/bluetooth/controller/ll_sw/lll_chan.c), but when I tried to make some changes into those 2 algorithms, it did not seem to do anything.

How would I be able to do any modification or test on Channel Selection Algorithms?

[Simon]

I don't know much about this. However, you could start by checking if the configs actually set inside .config file in the build folder. You could also search for the configs in the zephyr folder/relevant libraries and see how the configs are actually used, which will help you understand why it doesn't work.

I would recommend you to contact the Zephyr developers, the ones that wrote these libraries. Use the tools mentioned in the Reference Link, section 2.1 Maintenance and support:

• "For reporting issues, see Zephyr GitHub repository issues." 
• "For asking questions or providing feedback, see Zephyr mailing lists." 
• "For interacting with users and developers directly, use the #zephyrproject channel on freenode.net"

Best regards,

Simon

[BOZHENG]

Hi Simon

Thanks for your information. I still have one more question, and it was posted as another question here: https://devzone.nordicsemi.com/f/nordic-q-a/50403/nrf52840-ble-channel-map.

Could you please have a check if you could provide any help?

[Simon]

That case should be handled by another engineer. 

Best regards,

Simon