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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/**

* Copyright (c) 2014 - 2021, Nordic Semiconductor ASA

*

* All rights reserved.

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* Redistribution and use in source and binary forms, with or without modification,

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* list of conditions and the following disclaimer.

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* 2. Redistributions in binary form, except as embedded into a Nordic

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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

/**
 * Copyright (c) 2014 - 2021, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
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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.