NRF9160 DK UART configuration

[Hkhan7861]

Hi

I am currently running and adjusting the zephyr echo_bot uart sample
on my nrf9160 DK. Currently , the sample makes use of UART0 to send a receive information which I have made compatible with an external device and the nrf terminal. My issue is that configuring the exact code to UART1 or UART0 has been difficult to achieve. Please assist.

[Naeem Maroof]

Hello Hasssan Khan,

Thank you for contacting DevZone at NordicSemi.

Your query is regarding configuring and using a different uart on a nrf9160DK.

You can use overlay file to configure the device-tree properly for your needs.

For example, as in this case, you want to use uart1 to communicate to the computer for printing / echoing-back. You can choose your uart port for console output using following in the device overlay.

/{
    chosen {
        zephyr,console = &uart1;
        zephyr,shell-uart = &uart1;
        zephyr,uart-mcumgr = &uart1;
    };
};

Also, by default, uart1 would be disabled, so you need to enable it, and set the required baudrate using code like:

&uart1{
    compatible = "nordic,nrf-uarte";
    status = "okay";
    current-speed = <115200>;
    pinctrl-0 = <&uart1_default>;
    pinctrl-1 = <&uart1_sleep>;
};

Please connect with the configured baudrate on your serial terminaal or nrf terminal.
You need to connect to the correct COM port on your computer.

This is all I could infer from your query. If you need more specific help, please do send more information including code, log, and/or overlay files etc.

Thank you and regards,
Naeem