CONFIGURE UART ERROR IN NRF54L15

[Nguyen Kha Duong]

Hi everyone,
When I try configure UART (parity, data_bit, stop_bit, flow_ctrl), I have noticed error when I run in terminal: 
"

*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***

*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***

Failed to configure UART30, err -134

Failed to configure UART20, err -134
"

in file myuart.c: 

static struct uart_config uart_cfg = {

    .baudrate = 115200,

    .parity = UART_CFG_PARITY_NONE,

    .data_bits = UART_CFG_DATA_BITS_8,

    .stop_bits = UART_CFG_STOP_BITS_1,

    .flow_ctrl = UART_CFG_FLOW_CTRL_NONE,

};

void myuart_init(void)

{

    int ret;

    if (!device_is_ready(uart0_dev)) {

        printk("UART30 device not ready\n");

    }

    if (!device_is_ready(uart1_dev)) {

        printk("UART20 device not ready\n");

    }

    /* Configure UART20, UART30 */

    ret = uart_configure(uart0_dev, &uart_cfg);

    if (ret) {

        printk("Failed to configure UART30, err %d\n", ret);

    }

    ret = uart_configure(uart1_dev, &uart_cfg);

    if (ret) {

        printk("Failed to configure UART20, err %d\n", ret);

    }

};

Beside that, I configure UART in file devicetree:

&uart20 {

    compatible = "nordic,nrf-uarte";

    status = "okay";

    current-speed = <115200>;

    pinctrl-0 = <&uart20_default>;

    pinctrl-names = "default";

};

&uart30 {

    compatible = "nordic,nrf-uarte";

    status = "okay";

    current-speed = <115200>;

    pinctrl-0 = <&uart30_default>;

    pinctrl-names = "default";

};

You can explain for me with my error, please?

Thank for that,

[Kazi Afroza Sultana]

Hello,

The error messages "Failed to configure UART30, err -134" and "Failed to configure UART20, err -134" means that there is an issue with UART configuration.  

How have you defined the pins for these nodes?

I can see you have commented out the configuration part from the code.

It should be there and after that call the UART API function uart_configure() function and pass it the variable of type uart_config.

	int err = uart_configure(uart, &uart_cfg);

	if (err == -ENOSYS) {
		return -ENOSYS;
	}

If configuration is supported by the device, you will get negative errno code. (UART Driver - Nordic Developer Academy)

Can you try these and see if there is any change?