RE: SLM fault on startup with UART2

Thomas — Wed, 07 May 2025 07:53:55 GMT

Oooohhh - I have used two week on what I think is the same problem or maybe a similar problem with using uart2.

As soon as I enable uart2 in my devicetree for the project, the application crashes on startup.

BUT I cannot get the above fix to work. Have added a mcuboot.overlay, with the &uart2 disabled. But this is causing a build error:

-- Found devicetree overlay: D:/Workspaces/azure_iot_hub_7/sysbuild/mcuboot.overlay
devicetree error: D:/ncs/v3.0.1/zephyr/misc/empty_file.c:1 (column 1): parse error: expected ';', not '<EOF>'
CMake Error at D:/ncs/v3.0.1/zephyr/cmake/modules/dts.cmake:305 (execute_process):
execute_process failed command indexes:

1: "Child return code: 1"

My mcuboot.overlay file looks lige this:

&uart2 {

status = "disabled";

};

RE: SLM fault on startup with UART2

Vidar Berg — Fri, 25 Apr 2025 14:01:00 GMT

Hello Mike,

Thank you for reporting this! These kinds of issues can be tricky to track down. Hope you didn't have to spend too much time on it. Assuming you're not using the UARTE2 instance in your bootloader, a solution that doesn't require patching the SDK is to disable the uart2 node in the devicetree for MCUboot. I have reported this as a bug internally.

<project source directory>/sysbuild/mcuboot.overlay

&uart2 {
    status = "disabled";
}

Best regards,

Vidar