How to enable both physical uart0 and ble nus service uart

[Teijokk]

Hi, I'm using nrf52810 ,nrf connect, zephyr, vscode extension. I’m having trouble using both UART0 and the NUS UART service.  Here’s a snippet from my overlay file:

/ {

    chosen {

        nordic,nus-uart = &uart0;

    };

};

&uart0 {

    compatible = "nordic,nrf-uarte";

    current-speed = <115200>;

    status = "okay";

    pinctrl-0 = <&uart0_default>;

    pinctrl-1 = <&uart0_sleep>;

    pinctrl-names = "default", "sleep";

};

I previously tested this code on an NRF52840, which has two physical UARTs (UART0 and UART1), where NUS used UART0 and the physical UART was set to UART1.

How can I bind the NUS UART service to something other than UART0? When both are on the same UART peripheral, the code doesn’t work.

Is it possible to create a "dummy UART1" in the DTS file since the NUS service doesn’t use a hardware UART peripheral?

br

Teijo

[Priyanka]

Hi Teijo,

The problem is that nRF52810 has only one hardware UART and it's not possible to use the UART peripheral together for multiple stuff. 

You suggestion of using a dummy UART (say, uart1) for the NUS in the dts file could help (though I have not tried it here). You could maybe set it's status as disabled in the dts so that it does not attempt to assign a physical pin to it. I see that you have tried this and you get errors. Could you share your overlay file?

Another idea would be to maybe try time-sharing the UART0 and NUS.

Regards,

Priyanka