How can I write log on Keil? (such as printf, file print)

[HYUNCHEOLJANG]

My question a little weird. Because I am super beginner about BLE. So what I want is how to write string data. now i am looking to information about this. I cannot find it. :( so could you help me? Below code, you can well understand what I want.

this code is from "ble_app_proximity.uvpoj" . in the code, how can i write string to see console or data as text file?

static void alert_signal(uint8_t alert_level)
{
    switch (alert_level)
    {
        case BLE_CHAR_ALERT_LEVEL_NO_ALERT:
            m_is_link_loss_alerting = false;
            alert_led_blink_stop();

printf("NO_ALERT"); // I would like to use this kind method.
fprintf("NO_ALERT", "C:\\data.txt"); // or this kind method.

            break;

        case BLE_CHAR_ALERT_LEVEL_MILD_ALERT:
            alert_led_blink_start();
            break;

        case BLE_CHAR_ALERT_LEVEL_HIGH_ALERT:
            alert_led_blink_stop();
            nrf_gpio_pin_set(ALERT_PIN_NO);
            break;
            
        default:
            // No implementation needed.
            break;
    }
}

sorry about my English expression is not enough to understand.
do you understand? if you understand what i want and know about how to this, please help me:(

in short, I want to write string on text file using code in keil5.

[Balaji Srinivasan]

Hi there,

You will need to make printf send the string over UART and get it printed on a console on your PC. You can refer to this post on how to do this.

Alternatively, you can use the 'Debug Logger' module included in the SDK. Documentation on this can be found here -> devzone.nordicsemi.com/.../a00084.html .

Cheers, Balaji