nrf5340 audio occur HCI error after building network core

[LandyWang]

Hello,

I am using nrf5340 audio sample with the custom board.

I want to add my own FEM settings, so I modified the configuration as follows:

prj.conf

CONFIG_NCS_INCLUDE_RPMSG_CHILD_IMAGE=y # Make sure NCS build system will build network core

child_image\hci_rpmsg.conf

CONFIG_MPSL=y
CONFIG_MPSL_FEM=y
CONFIG_MPSL_FEM_SIMPLE_GPIO=y
CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
CONFIG_BT_CTLR_TX_PWR_PLUS_8=y
CONFIG_BT_CTLR_TX_PWR_ANTENNA=12

CONFIG_BT_EXT_ADV=y
CONFIG_BT_PER_ADV=y
CONFIG_BT_CTLR_ADV_EXT=y
CONFIG_BT_HCI=y
CONFIG_BT_HCI_VS_EXT=y

Execute Pristine build after modifying these configurations, a merged_domains.hex file will be generated.
I burned the merged_domains.hex into the nrf5340 module, and an error occurred:

I think this error should be caused by enabling CONFIG_NCS_INCLUDE_RPMSG_CHILD_IMAGE. Maybe I have some necessary CONFIG not added in hci_rpmsg.conf. Is there any reference material?

[Elfving]

Hello,

I think this error should be caused by enabling CONFIG_NCS_INCLUDE_RPMSG_CHILD_IMAGE. Maybe I have some necessary CONFIG not added in hci_rpmsg.conf. Is there any reference material?

Yes, could you try building it without the CONFIG_NCS_INCLUDE_RPMSG_CHILD_IMAGE configuration? I believe it might select the default BLE controller on the network core, as opposed to the LE Audio stack that needs to run on the netcore for the application to work.

Regards,

Elfving

[LandyWang]

Hello,

Thank you for your reply. I can build successfully after I disable CONFIG_NCS_INCLUDE_RPMSG_CHILD_IMAGE configuration.

But in this way, the configuration I set in child_image\hci_rpmsg.conf will not be compiled.

Is there any way to set the child image configuration of the nrf5340 audio sample?
Is the nrf5340 audio sample able to set the child image configuration?

[Elfving]

Hello again, and sorry about the delay.

The Audio controller is precompiled as opposed to hci_rpmsg, so it is very limited what you can configure on it. I believe the configurations that can be enabled on the controller does so through the application. 

What configurations are you trying to enable on the child image?

Regards,

Elfving

[LandyWang]

Hello,

Thank you for your reply.

Here are the configurations I want to enable in the child image.

CONFIG_MPSL=y
CONFIG_MPSL_FEM=y
CONFIG_MPSL_FEM_SIMPLE_GPIO=y
CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
CONFIG_BT_CTLR_TX_PWR_PLUS_8=y
CONFIG_BT_CTLR_TX_PWR_ANTENNA=12

CONFIG_BT_EXT_ADV=y
CONFIG_BT_PER_ADV=y
CONFIG_BT_CTLR_ADV_EXT=y
CONFIG_BT_HCI=y
CONFIG_BT_HCI_VS_EXT=y

I want to set some FEM related configurations.

[Karl Ylvisaker]

Hello,

As my colleague Håkon mentioned the LE Audio controller is precompiled, and so adding netcore compilation options are not possible.

You can read about how you can enable FEM support in the nRF5340 Audio application here.

Best regards,
Karl

[LandyWang]

Thank you for your reply.

I will refer to this link to configure FEM, if there are other problems, I will report back.

[Karl Ylvisaker]

LandyWang said:

Thank you for your reply.

No problem, I am happy to help! :) 

LandyWang said:

I will refer to this link to configure FEM, if there are other problems, I will report back.

Great! Please do not hesitate to ask if you should encounter any issues or questions.

Best regards,
Karl

[LandyWang]

Hello again,

I have a problem configuring FEM.

I want to use Skyworks FEM with nRF5340 Audio application, but this link only provides how to use the nRF21540 front-end module with nRF5340 Audio application.

I refer to here to set prj.conf and overlay as follows:

<prj.conf>

CONFIG_MPSL_FEM_GENERIC_TWO_CTRL_PINS_SUPPORT=y
CONFIG_MPSL_FEM_SIMPLE_GPIO=y
CONFIG_MPSL_FEM_NCS_SUPPORTED_FEM_USED=y

<nrf5340_audio_dk_nrf5340_cpuapp.overlay>

/ {
    nrf_radio_fem: pa_lna {
        compatible = "skyworks,sky66112-11", "generic-fem-two-ctrl-pins";
        ctx-gpios = <&gpio1 4 GPIO_ACTIVE_LOW>;
        ctx-settle-time-us = < 23 >;
        crx-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
        crx-settle-time-us = < 5 >;
        cps-gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;
        tx-gain-db = < 13 >;
        rx-gain-db = < 14 >;
    };
};

I'm wondering if nRF5340 Audio application supports Skyworks FEM.

[Bendik Heiskel]

Hi,

The audio controller only supports the nRF21540 FEM. This is a unfortunate consequence of the controller being precompiled.

 

Best regards,

Bendik