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softdevice - How to print UART message / what is SOFTDEVICE_PRESENT and where it is defined in Segger

Hello,

I am using nRF52840 DK board and nRF5SDK17.0.2.

I am trying to code to print data on UART so I have added below folder path into user include directories:

../../../config
../../../../../../components
../../../../../../components/boards
../../../../../../components/drivers_nrf/nrf_soc_nosd
../../../../../../components/libraries/atomic
../../../../../../components/libraries/balloc
../../../../../../components/libraries/bsp
../../../../../../components/libraries/delay
../../../../../../components/libraries/experimental_section_vars
../../../../../../components/libraries/fifo
../../../../../../components/libraries/log
../../../../../../components/libraries/log/src
../../../../../../components/libraries/memobj
../../../../../../components/libraries/ringbuf
../../../../../../components/libraries/strerror
../../../../../../components/libraries/uart
../../../../../../components/libraries/util
../../../../../../components/toolchain/cmsis/include
../../..
../../../../../../external/fprintf
../../../../../../integration/nrfx
../../../../../../integration/nrfx/legacy
../../../../../../modules/nrfx
../../../../../../modules/nrfx/drivers/include
../../../../../../modules/nrfx/hal
../../../../../../modules/nrfx/mdk
../config

0508.sdk_config.h

uploaded sdk_config.h file for your reference.

Also, I have added the required file to the project but still, I am getting the error below.

Compiling 'nrf_log_frontend.c'

sdk_common.h

nrf_log_frontend.c

nrf_mbr.h: No such file or directory

What is SOFTDEVICE_PRESENT and where it is defined in SEGGER?

/**
 * Copyright (c) 2014 - 2020, 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.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
/** @file
 * @defgroup uart_example_main main.c
 * @{
 * @ingroup uart_example
 * @brief UART Example Application main file.
 *
 * This file contains the source code for a sample application using UART.
 *
 */

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "app_uart.h"
#include "app_error.h"
#include "nrf_delay.h"
#include "nrf.h"
#include "bsp.h"
#if defined (UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined (UARTE_PRESENT)
#include "nrf_uarte.h"
#endif


//#define ENABLE_LOOPBACK_TEST  /**< if defined, then this example will be a loopback test, which means that TX should be connected to RX to get data loopback. */

#define MAX_TEST_DATA_BYTES     (15U)                /**< max number of test bytes to be used for tx and rx. */
#define UART_TX_BUF_SIZE 256                         /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256                         /**< UART RX buffer size. */

void uart_error_handle(app_uart_evt_t * p_event)
{
    if (p_event->evt_type == APP_UART_COMMUNICATION_ERROR)
    {
        APP_ERROR_HANDLER(p_event->data.error_communication);
    }
    else if (p_event->evt_type == APP_UART_FIFO_ERROR)
    {
        APP_ERROR_HANDLER(p_event->data.error_code);
    }
}


#ifdef ENABLE_LOOPBACK_TEST
/* Use flow control in loopback test. */
#define UART_HWFC APP_UART_FLOW_CONTROL_ENABLED

/** @brief Function for setting the @ref ERROR_PIN high, and then enter an infinite loop.
 */
static void show_error(void)
{

    bsp_board_leds_on();
    while (true)
    {
        // Do nothing.
    }
}


/** @brief Function for testing UART loop back.
 *  @details Transmitts one character at a time to check if the data received from the loopback is same as the transmitted data.
 *  @note  @ref TX_PIN_NUMBER must be connected to @ref RX_PIN_NUMBER)
 */
static void uart_loopback_test()
{
    uint8_t * tx_data = (uint8_t *)("\r\nLOOPBACK_TEST\r\n");
    uint8_t   rx_data;

    // Start sending one byte and see if you get the same
    for (uint32_t i = 0; i < MAX_TEST_DATA_BYTES; i++)
    {
        uint32_t err_code;
        while (app_uart_put(tx_data[i]) != NRF_SUCCESS);

        nrf_delay_ms(10);
        err_code = app_uart_get(&rx_data);

        if ((rx_data != tx_data[i]) || (err_code != NRF_SUCCESS))
        {
            show_error();
        }
    }
    return;
}
#else
/* When UART is used for communication with the host do not use flow control.*/
#define UART_HWFC APP_UART_FLOW_CONTROL_DISABLED
#endif


/**
 * @brief Function for main application entry.
 */
int main(void)
{
    uint32_t err_code;

    bsp_board_init(BSP_INIT_LEDS);

    const app_uart_comm_params_t comm_params =
      {
          RX_PIN_NUMBER,
          TX_PIN_NUMBER,
          RTS_PIN_NUMBER,
          CTS_PIN_NUMBER,
          UART_HWFC,
          false,
#if defined (UART_PRESENT)
          NRF_UART_BAUDRATE_115200
#else
          NRF_UARTE_BAUDRATE_115200
#endif
      };

    APP_UART_FIFO_INIT(&comm_params,
                         UART_RX_BUF_SIZE,
                         UART_TX_BUF_SIZE,
                         uart_error_handle,
                         APP_IRQ_PRIORITY_LOWEST,
                         err_code);

    APP_ERROR_CHECK(err_code);

#ifndef ENABLE_LOOPBACK_TEST
    printf("\r\nUART example started.\r\n");

    while (true)
    {
        uint8_t cr;
        while (app_uart_get(&cr) != NRF_SUCCESS);
        while (app_uart_put(cr) != NRF_SUCCESS);

        if (cr == 'q' || cr == 'Q')
        {
            printf(" \r\nExit!\r\n");

            while (true)
            {
                // Do nothing.
            }
        }
    }
#else

    // This part of the example is just for testing the loopback .
    while (true)
    {
        uart_loopback_test();
    }
#endif
}


/** @} */

I am attaching my screenshot for your reference.

What I am doing wrong? Please help.

Please find the attached code file.

Thanks and regards,

Neeraj Dhekale

  • Hello Jared,

    Thanks for the reply.

    The PCA10040 is not the correct folder for the nRF52840 DK, it doesn't map the pins correctly nor does it adjust the memory settings correctly for the nRF52840. You should use PCA10056

    Yes, Recently I got realized I was using the wrong folder from here. And I started recently to use PCA 10056 > S140 folder.

    Still not sure why this would result in serial data being printed out on the Debug terminal.

    Correct. I think so because when I use nRF5SDK17.0.2 > example > peripheral> uart with

    PCA10040 > S132 folder it works completely fine and I can see the log is getting printed on UART. Also, I had cross-checked it in the PuTTy tool.

    could you see if you're able to reproduce it using the correct folder. 

    Let me check and update you on this.

    Thanks and regards,

    Neeraj Dhekale

  • Hello Jared,

    could you see if you're able to reproduce it using the correct folder.

    I have checked with PCA10056 as you can see in the screenshot at the top (Written PCA10056). But behavior is similar like before.

    instead of the printing message on UART / Terminal Emulator, it is getting printed on Debug terminal,

    Thanks and regards,

    Neeraj Dhekale

  • Hello Jared,

    I found the problem there was 1 file that needs to be included in nRF_Libraries folder that is retarget.c kept in nRF5_SDK_17.0.2_d674dde/components/libraries/uart/retarget.c

    instead of the printing message on UART / Terminal Emulator, it is getting printed on Debug terminal,

    Maybe I assume this retarget.c file is necessary to indicate that LOG should print on UART instead of Debug terminal (Where generally RTT LOG is getting displayed).

    Thank you so much Jared for your help. Got so much input from you. Really Appreciated.

    Thanks and regards,

    Neeraj Dhekale

  • Hello Jared,

    I found the problem there was 1 file that needs to be included in nRF_Libraries folder that is retarget.c kept in nRF5_SDK_17.0.2_d674dde/components/libraries/uart/retarget.c

    instead of the printing message on UART / Terminal Emulator, it is getting printed on Debug terminal,

    Maybe I assume this retarget.c file is necessary to indicate that LOG should print on UART instead of Debug terminal (Where generally RTT LOG is getting displayed).

    Thank you so much Jared for your help. Got so much input from you. Really Appreciated.

    Thanks and regards,

    Neeraj Dhekale

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