nrf54L15 : Unable to use UARTE00 P2.0, P2.2, P2.3, P2.4 not able to send data.

[varsha@]

Hello,

I am not able to send any data through the pins of port P2 using Pins : P2.0, P2.2, P2.3, P2.4 , while the pins P1.11, P1,10, and P1.4, P1.5 are working properly.

I referred to this issue and tried to configure accordingly, but still unable to send and receive data. I am using the DK, 

I tried to call nrfx_power_constlat_mode_request(); as well, but I am not sure where I am going wrong.

[Kenneth]

Hi,

I can see I had the other case, did you also see my follow up reply about board configurator?

Kenneth

[varsha@]

Hello,

Sorry for the Late Response.

I did not understand what I need to configure in the Board Configurator. Are we talking about the application in nrf connect for Desktop?

[Kenneth]

Yes, but I can see that the app doesn't support this as of yet, it's planned end of September.

Kenneth

[varsha@]

Hello, 

I wanted to use P2.02 as RXD and P2.03 as TXD in NRF54L15. I am using a custom board. 

My configuration looks like this on the dts File :

    /omit-if-no-ref/ uart00_default: uart00_default {
        group1 {
            psels = <NRF_PSEL(UART_TX, 2, 3)>;
        };
        group2 {
            psels = <NRF_PSEL(UART_RX, 2, 2)>;
            // bias-pull-up;
        };
    };

    /omit-if-no-ref/ uart00_sleep: uart00_sleep {
        group1 {
            psels = <NRF_PSEL(UART_TX, 2, 3)>,
                <NRF_PSEL(UART_RX, 2, 2)>;
            low-power-enable;
        };
    };
/////////////////////////////////////////////////////////////////////////////////////////////////////////
&uart00 {
    compatible = "nordic,nrf-uarte";
    status = "okay";
    current-speed = <9600>;
    pinctrl-0 = <&uart00_default>;
    pinctrl-1 = <&uart00_sleep>;
    pinctrl-names = "default", "sleep";
};

///////////////////////////////////////////////////////////////////////////////////////////////////////////

#include "header.h"

#define UART_USB_NODE   DT_NODELABEL(uart00)
const struct device *uart_dev_usb= DEVICE_DT_GET(UART_USB_NODE);
char usb_buff[10] = {0};
const struct uart_config uart_cfg_usb = {
 .baudrate = 9600,
 .parity = UART_CFG_PARITY_NONE,
 .stop_bits = UART_CFG_STOP_BITS_1,
 .data_bits = UART_CFG_DATA_BITS_8,
 .flow_ctrl = UART_CFG_FLOW_CTRL_NONE
};

static void uart_usb_cb(const struct device *dev, struct uart_event *evt, void *user_data)
{
//LOG_INF("uart_cb enum = %d\n\r",evt->type);
 switch (evt->type)
 {
    case UART_TX_DONE:
        printk("UART_TX_DONE \r\n");
    // do something
    break;  
    case UART_TX_ABORTED:
    // do something
    break;


    case UART_RX_RDY:
        f.gnss_uart_rx_F = 1;
        printk("RX Data :  %s\r\n",usb_buff);

        break;  
    case UART_RX_BUF_REQUEST:
    // do something
    break;  
    case UART_RX_BUF_RELEASED:
       
    // do something
    break;
    case UART_RX_DISABLED:
        uart_rx_enable(dev, (uint8_t *)usb_buff, sizeof(usb_buff), 500 * 1000);
        break;  
    case UART_RX_STOPPED:
    // do something
    break;
    default:
    break;
 }
}

void USB_init(void)
{  
    int err = 0;
    if (!device_is_ready(uart_dev_usb))
        printk("err : device_is_ready\r\n");
    else
        printk("no err : device_is_ready\r\n");

    err = uart_configure(uart_dev_usb, &uart_cfg_usb);  
    if (err == -ENOSYS)
    {
        printk("err = %d : uart_configure\r\n", err);
        // return -ENOSYS;
    }
    else
    {
        printk("err = %d : uart_configure\r\n", err);
    }

    err = uart_callback_set(uart_dev_usb, uart_usb_cb, NULL);
    if (err)
    {
        printk("err = %d : uart_callback_set\r\n", err);
        // return err;
    }
    else
    {
        printk("err = %d : uart_callback_set\r\n", err);
    }
    uart_rx_enable(uart_dev_usb, (uint8_t *)usb_buff, sizeof(usb_buff), 1000*1000);
}

void USB_printk(char *data,int len)
{
    int err = uart_tx(uart_dev_usb, data, len, 100);
    printk("err = %d\r\n", err);
}

Also Before transmitting, I used the function : 

nrfx_power_constlat_mode_request();

I am using a loopback format.

I am using P1.4, P1.5 and P1.10, and P1.11 also, but did not face any issue while using those.

Is there something i need to change? Am I going wrong somewhere?

[Kenneth]

Hi,

I can't seem to find that P2.03 support UARTE00 TX?
https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/chapters/pin.html 

Kenneth

[varsha@]

Hello, 

Thankyou For Confirming.

We figured that out later. We need this UART for logging.and we want to use only TX. So I guess it be possible to use P2.2 as TX (Swapping with P2.3) for UARTE00?