NRF5340DK UART_1 problem

[DavidAbreu99]

Hello,

I'm trying to develop a ble-uart gateway based on mesh provisioner and peripheral-uart samples but i'm getting an error on getting the device bind of the uart device.

I'm trying to use the UART_0 as debug using printk() and wanted to use 2 pins (32 and 33) as RX and TX with the name "UART_1". I went to the .dts file andi have this device

arduino_serial: &uart1 {
	compatible = "nordic,nrf-uarte";
	current-speed = <115200>;
	tx-pin = <33>;
	rx-pin = <32>;
	rts-pin = <34>;
	cts-pin = <35>;
	label = "UART_1";
};

However i can't seem to be able to use this device, i've tried to use it by label, nodelabel and even creating an alias however i always get the NULL error in

static const struct device *uart_dev;
uart_dev = device_get_binding("UART_1");

    if (uart_dev == NULL) {
        printk("Cannot initialize UART 1 device\n");
        return;
    }

I've searched and tried various solutions found in the devzone forums but none resolved my issue, does anyone know what can i do?

[Amanda Hsieh]

Hi, 

Please make a new file in the project directory called "nrf5340dk_nrf5340_cpuapp.overlay" if your using the DK and build for the cpuapp as 

&uart1 {
    status = "okay";
	rts-pin = <34>;
	cts-pin = <35>;
	label = "UART_1";
};

Also, make sure that CONFIG_NRFX_UARTE1=y is enabled in prj.conf too.

Here is the example. hello_world_nRF5340DK_UART1.zip

Regards,

Amanda