How to use internal LFCLK on nrf5340 chip?

RE: How to use internal LFCLK on nrf5340 chip?

likai — Tue, 22 Nov 2022 09:46:03 GMT

and more,V2.0.0\nrf\samples\bluetooth\peripheral_uart\prj.conf ,in this file,add the same configuration.resolved.

Thanks.

RE: How to use internal LFCLK on nrf5340 chip?

Bendik Heiskel — Tue, 22 Nov 2022 08:07:49 GMT

The filename should be hci_rpmsg.conf, there is a typo in the filename.

RE: How to use internal LFCLK on nrf5340 chip?

likai — Tue, 22 Nov 2022 02:26:37 GMT

I create a file named hci_ rpsmg.conf in my_project/child_image/hci_rpmsg and add the same configuration. There is also a boards folder in this directory. After recompilation, it has no effect.

RE: How to use internal LFCLK on nrf5340 chip?

Bendik Heiskel — Mon, 21 Nov 2022 14:56:11 GMT

For the nRF5340 you will also need to add the same configuration options to my_project/child_image/hci_rpmsg/hci_rpmsg.conf

If the file/folders don't exists you just have to make them.

Sorry I forgot to include this in my first response

RE: How to use internal LFCLK on nrf5340 chip?

likai — Mon, 21 Nov 2022 08:29:09 GMT

Thanks for your reply!
After added the following to the pro.conf:

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

run my project,debug info tells us:

bt_enable() return a error message.

Please take a look.

Thanks.

RE: How to use internal LFCLK on nrf5340 chip?

Bendik Heiskel — Fri, 18 Nov 2022 12:44:48 GMT

Hi,

To change the LFCLK source to the internal LFRC you must add the following to the prj.conf:

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

Best regards,

Bendik