SWD interface example

[Trinh Le]

Hi, I'm relatively new to nRF products and embedded systems and right now I want to try out programming a adafruit feather nrf52840 express with a nrf52dk (52832) board and swd interface (and a swd connector breakout board for easy wiring). I'm wondering if there's any example code or special instruction to make this possible. So far I've tried connecting them through 4 swd pins (from other posts here i believe the connections are correct)  and with segger i tried "build and run" option but it only flash on my nrf52dk board not the feather board. ( i ran the blinky example for pca10040)

anything I'm missing here? Appreciate any help because i'm pretty new to this stuff.

[Sigurd]

Hi,

We have a guide here: https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/dk/hw_debug_out_v2.html

[Trinh Le]

Hi,

Thank you for your response. It seems like the feather board is changing but I can't seem to make the LED blinks. Can you provide a guidance of what I need to modify from the .../examples/peripheral/blinky so that I can make the LED blinks?

[Sigurd]

To test the CONN LED, try this code:

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/** @file
 *
 * @defgroup blinky_example_main main.c
 * @{
 * @ingroup blinky_example
 * @brief Blinky Example Application main file.
 *
 * This file contains the source code for a sample application to blink LEDs.
 *
 */

#include <stdbool.h>
#include <stdint.h>
#include "nrf_delay.h"
#include "boards.h"
#include "nrf_gpio.h"

#define LED_PIN NRF_GPIO_PIN_MAP(1,10) //P1.10 LED 

/**
 * @brief Function for application main entry.
 */
int main(void)
{

    nrf_gpio_cfg_output(LED_PIN);

    /* Toggle LEDs. */
    while (true)
    {
            nrf_gpio_pin_toggle(LED_PIN);
            nrf_delay_ms(1000);
    }
}

/**
 *@}
 **/

( i ran the blinky example for pca10040)

Use the pca10056 project for the code you flash to the nRF52840.