UART1 in NRF52840 board with VSCode (nrf connect sdk)

Question

everyone~ I'm using NRF52840 board for getting location data(latitude, longitude, satellites) from RYS8330. Currently uart0 is used to another function. So I should use uart1 with another pins. How can I initialize the uart1 and assign pins?

I had searched many samples in zephyr library. But I can't find anything similar to my purpose.

Answer 1

I recommend the DevAcademy guide on the nRF Connect SDK. In short, you can use pinctrl to change pins for the drivers.

EDIT: Since I should explain how instead of linking. Docs are in the above pinctrl link. For an example on pinctrl, see https://github.com/nrfconnect/sdk-nrf/blob/v2.5.0/samples/zigbee/ncp/boards/nrf52833dk_nrf52833.overlay, which is like this:

*
 * Copyright (c) 2021-2023 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */

&uart1 {
    status = "okay";
    pinctrl-0 = <&uart1_default_alt>;
    pinctrl-1 = <&uart1_sleep_alt>;
    pinctrl-names = "default", "sleep";
};

&uart0 {
    pinctrl-0 = <&uart0_default_alt>;
    pinctrl-1 = <&uart0_sleep_alt>;
    pinctrl-names = "default", "sleep";
};

&zephyr_udc0 {
    cdc_acm_uart0: cdc_acm_uart0 {
        compatible = "zephyr,cdc-acm-uart";
    };
};

&pinctrl {
    uart1_default_alt: uart1_default_alt {
        group1 {
            psels = <NRF_PSEL(UART_TX, 0, 6)>,
                <NRF_PSEL(UART_RX, 0, 8)>,
                <NRF_PSEL(UART_RTS, 0, 5)>,
                <NRF_PSEL(UART_CTS, 0, 7)>;
        };
    };

    uart1_sleep_alt: uart1_sleep_alt {
        group1 {
            psels = <NRF_PSEL(UART_TX, 0, 6)>,
                <NRF_PSEL(UART_RX, 0, 8)>,
                <NRF_PSEL(UART_RTS, 0, 5)>,
                <NRF_PSEL(UART_CTS, 0, 7)>;
            low-power-enable;
        };
    };

    uart0_default_alt: uart0_default_alt {
        group1 {
            psels = <NRF_PSEL(UART_RX, 1, 1)>,
                <NRF_PSEL(UART_TX, 1, 2)>;
        };
    };

    uart0_sleep_alt: uart0_sleep_alt {
        group1 {
            psels = <NRF_PSEL(UART_RX, 1, 1)>,
                <NRF_PSEL(UART_TX, 1, 2)>;
            low-power-enable;
        };
    };

};

/ {
    chosen {
        ncs,zigbee-uart = &uart1;
    };
};