Kernel panic when I remove uart0_default

[mchartier]

I have a simple application running on our custom board based on nRF52840. Our board does not have any uart pins connected so we use RTT exclusively for console I/O. I attempted to remove all references to uart pins from the board.dts file and this causes a kernel panic. Is there any example project that shows the proper way to replace uart with RTT?

My custom board files are attached. The files work as-is, however if I remove uart0_default and uart0_sleep from the miTracerV2.dtsi I will get the kernel panic.

miTracerV2.zip

[Vidar Berg]

Hello,

You can disable the uart0 in your board's devictree if your not using it.

&uart0 {
    status = "disabled";
};

Then add the following kconfig symbols to your prj.conf file (or you can apply these as default configurations in your board file)

CONFIG_SERIAL=n
CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y

Best regards,

Vidar

[mchartier]

Perfect! Thanks