About the problem of ncs mesh opening PA\LNA error.

[xinjiang]

I use ncs1.6.0 to develop on nRF52832DK. The current requirement is to enable PA LNA support on mesh.

I learned how to use FEM driver through this blog. I added the corresponding .overlay file and macro configuration to the nrf\samples\bluetooth\mesh\light_switch example. But an abnormal error occurred when the program was running. I have uploaded the demo to the attachment, roughly as follows:

4572.light_switch_demo.rar

Add in prj.conf:

# FEM configration (PA/LNA)
CONFIG_MPSL=y
CONFIG_MPSL_FEM=y
CONFIG_MPSL_FEM_SIMPLE_GPIO=y

Add nrf52dk_nrf52832.overlay file:

/ {
    nrf_radio_fem: pa_lna {
        compatible = "skyworks,sky66112-11", "generic-fem-two-ctrl-pins";
        ctx-gpios = <&gpio0 24 GPIO_ACTIVE_HIGH>;
        crx-gpios = <&gpio0 20 GPIO_ACTIVE_HIGH>;
    };
};

Error log:

[13:55:08.527]收←◆I: Bootloader chainload address offset: 0xc000
I: Jumping to the first image slot
[13:57:48.709]收←◆*** Booting Zephyr OS build v2.6.0-rc1-ncs1  ***

[13:57:50.157]收←◆Initializing...
I: 6 Sectors of 4096 bytes
I: alloc wra: 0, ff0
I: data wra: 0, 0

[13:58:00.169]收←◆ASSERTION FAIL @ WEST_TOPDIR/zephyr/subsys/bluetooth/host/hci_core.c:307
E: r0/a1:  0x00000003  r1/a2:  0x0002d5cc  r2/a3:  0x00000001
E: r3/a4:  0x000072cd r12/ip:  0x00000000 r14/lr:  0x0000980b
E:  xpsr:  0x41000000
E: Faulting instruction address (r15/pc): 0x00009816
E: >>> ZEPHYR FATAL ERROR 3: Kernel oops on CPU 0
E: Current thread: 0x20002320 (unknown)
E: Resetting system

The reason is that a certain command of hci did not return and the semaphore was blocked.

I don't know what commands the underlying logic sends to hci that cause conflicts with FEM. Does FEM only support BLE?

[xinjiang]

Does anyone answer this question?

[Mttrinh]

Hi,

MPSL + Zephyr controller is not supported, so you won't be able to use FEM through MPSL. You will have to wait for Mesh support in Softdevice controller then it will be possible to use MPSL + FEM.

[xinjiang]

Does the follow-up FEM plan to support mesh? When does the mesh team plan to support?

[Mttrinh]

Hi,

I suggest you contact your Regional Sales Manager for future roadmap questions. If you don't know who that is you can send me a PM.