nRF9151 CONFIG_UART_ASYNC_API

[abdukhair]

Hi!

I am using nRF9151-DK, enabling UART1 and using CONFIG_UART_ASYNC_API.

The build is successful, but the problem every time i connect a flashed kit with this binaries into nrf Programmer software.

I get notification of "Application core is protected".

I have isolated all the included configurations and found out that CONFIG_UART_ASYNC_API is causing this.

Am i missing some configuration? How to overcome this issue?

UART-related config:

# Enable UART1 Async
CONFIG_SERIAL=y
CONFIG_UART_ASYNC_API=y
CONFIG_UART_1_ASYNC=y
CONFIG_UART_1_INTERRUPT_DRIVEN=n

Devicetree:

&uart1 {
    status = "okay";
    current-speed = <115200>;
    pinctrl-0 = <&uart1_default>;
    pinctrl-1 = <&uart1_sleep>;
    pinctrl-names = "default", "sleep";
};

Best regards,

Abdu

[Menon]

Hello,

I think the issue you are seeing is due to the errata where the access port gets locked in WFI and WFE.
Try commenting out lines 55 and 57 in: ncs\v3.0.1\modules\hal\nordic\nrfx\mdk\system_nrf91_approtect.h, See the same here

Kind Regards,

Abhijith

[abdukhair]

Hi Abhijith,

The issue is fixed now, using this workaround.

Thank you for your support

Best Regards,

Abdu