Reading ADC in nRF52840

RE: Reading ADC in nRF52840

ovrebekk — Tue, 19 Nov 2019 09:34:50 GMT

That's great news 🙂

Best regards
Torbjørn

RE: Reading ADC in nRF52840

Jagbir — Mon, 18 Nov 2019 16:51:57 GMT

I had problems in viewing the error messages in debug terminal window but I am fine now.

RE: Reading ADC in nRF52840

ovrebekk — Mon, 18 Nov 2019 14:40:00 GMT

Sorry for the late reply, I was on travel all last week.

Can you not get the project I sent you to work either?
It is based on the code you sent me originally.

If you diff my code with yours you should see a list of all the changes I made.

Best regards
Torbjørn

RE: Reading ADC in nRF52840

Jagbir — Mon, 11 Nov 2019 23:01:50 GMT

I am not getting a reliable connection over UART. When I stop debugging then I getting following error. The message on the UART to change RAM parameters was different than that you found..

RAM_START=0x20002BE0

RAM_SIZE=0x3D420

After changing the RAM settings to above, the call stack still gives me error 0x04 again and the UART prints following.

<info> app_timer: RTC: initialized.
<error> app: Fatal error
<warning> app: System reset

How do I debug this problem.Can you provide the steps you followed for debugging the problem related to the initialization of the ble_nus service.

RE: Reading ADC in nRF52840

Jagbir — Mon, 11 Nov 2019 22:06:27 GMT

I was able to print ouput on uart by initializing log but not on RTT.

uint32_t err_code = NRF_LOG_INIT(NULL);

RE: Reading ADC in nRF52840

Jagbir — Mon, 11 Nov 2019 21:38:21 GMT

Ovrebekk,

Thanks for your help.

I am trying, step by step to replicate what you did to fix my code and I have few questions.

As you mentioned, I was able to remove error 0x08 (Invalid state ) by commenting uart_init().

After that I I started getting error 0x04 (No Memory for operation). I need to output the log to find the RAM address to fix this error. My problem is that I was not able to print any log output. How were you able to print the log output to find the RAM address.

I tried using both the UART as well RTT logging to print the debug message. I found that both UART and RTT works for me with the sadc example.

Thanks

RE: Reading ADC in nRF52840

ovrebekk — Thu, 07 Nov 2019 13:31:49 GMT

1) Yes, this error does not affect the program itself, it is only a convenience issue.

2) Yes, I get the following log output when I run your code (after commenting out the uart_init() call):

<info> app_timer: RTC: initialized.
<warning> nrf_sdh_ble: Insufficient RAM allocated for the SoftDevice.
<warning> nrf_sdh_ble: Change the RAM start location from 0x20002AE8 to 0x20002BE0.
<warning> nrf_sdh_ble: Maximum RAM size for application is 0x3D420.
<error> nrf_sdh_ble: sd_ble_enable() returned NRF_ERROR_NO_MEM.
<error> app: Fatal error
<warning> app: System reset

After fixing this issue I got another problem related to the initialization of the ble_nus service.
The reason for this problem is that in order to use a proprietary service you need to set the NRF_SDH_BLE_VS_UUID_COUNT define in sdk_config.h equal to the number of unique 128-bit UUID's you are using in your application.

The ble_nus service needs 1 128-bit UUID, so you have to set this value to 1 or more and once again change the RAM settings to make room for this:

<warning> nrf_sdh_ble: Change the RAM start location from 0x20002BE8 to 0x20002BF0.
<warning> nrf_sdh_ble: Maximum RAM size for application is 0x3D410.

After fixing the RAM settings again I now got an error because you are trying to initialize timer 0 in the application. The TIMER0 module is used by the SoftDevice, and can not be used by the application when the SoftDevice is in use.

To fix this problem I had to change this line (line 127 of main.c):

static const nrf_drv_timer_t m_timer = NRF_DRV_TIMER_INSTANCE(0);

to this:

static const nrf_drv_timer_t m_timer = NRF_DRV_TIMER_INSTANCE(1);

Then I had to modify sdk_config.h to enable TIMER1 instead of TIMER0.

With all this fixed the application appears to run nicely, and I can connect to the kit from my phone.

I attached the modified project for your reference:

devzone.nordicsemi.com/.../ble_5F00_app_5F00_uart.zip

The only project I updated was the one in this folder:
\ble_app_uart\pca10056\s140\ses

Best regards
Torbjørn

RE: Reading ADC in nRF52840

Jagbir — Wed, 06 Nov 2019 12:09:25 GMT

1) Yes, I did change the cmsis_gcc but it did not fix the error. Can we the ignore errors displayed the source navigator window on SES,

2) I have connected the dev kit to putty terminal with the desired setting but I don't see any output on putty screen.I have already attached the full project in the attachments here. Can you recreate the errors with nRf52840 DK with SES and debug it.

RE: Reading ADC in nRF52840

ovrebekk — Wed, 06 Nov 2019 09:03:28 GMT

1) The reply from Johannes in the case you link to is describing the reason for this issue, no?
Did you try his suggested fix, by making some modifications to the cmsis_gcc.h file?

2) You have to connect to the CDC comport of your development kit, and set the baudrate to 115200. Then you should see the log output when you run your code, and the log will include the correct RAM settings for your project.

Best regards
Torbjørn

RE: Reading ADC in nRF52840

Jagbir — Mon, 04 Nov 2019 17:44:46 GMT

I am still getting the same error after disabling the uart_init().

Couple of questions:

1) In the source navigator window on SES, I do see an error message "unknown register name 'vfpcc' in asm" but this issue is not preventing me from building. I did search the devzone for this issue , in the Case ID: 208419 it's mentioned that this issue is just a visual distraction and doesn't impact building/code execution . I have confirmed that I use gcc instead of clang in my project but I am unsure why I am getting this error.

2) How to access the UART log. How did you diagnose the RAM settings.

Thanks.

RE: Reading ADC in nRF52840

ovrebekk — Mon, 04 Nov 2019 13:58:15 GMT

Andreas has left Nordic unfortunately, and I will take over the case instead.

The problem with your code is that you initialize the UART before you enable logging.

Since the log module is configured to use the UART this means you are initializing it twice.

If you comment out the call to uart_init() your code should run. It crashes again because the RAM settings are incorrect, but the UART log will inform you how to fix this.

Best regards
Torbjørn Øvrebekk

RE: Reading ADC in nRF52840

Jagbir — Fri, 01 Nov 2019 12:31:23 GMT

Andreas,

I was able to use the new function but I my program always ends up in a break point condition after log_init(). Am I initializing something multiple times ? See the following link.

devzone.nordicsemi.com/.../nRF5_5F00_SDK_5F00_16.0.0_5F00_98a08e2_5F00_ble_5F00_app_5F00_uart_5F00_saadc_5F00_10_5F00_31.zip

RE: Reading ADC in nRF52840

Jagbir — Thu, 31 Oct 2019 20:35:51 GMT

I was able to use the new function but I my program always ends up in a break point condition after log_init(). Am I initializing something multiple times ?

devzone.nordicsemi.com/.../nRF5_5F00_SDK_5F00_16.0.0_5F00_98a08e2_5F00_ble_5F00_app_5F00_uart_5F00_saadc_5F00_10_5F00_31.zip

RE: Reading ADC in nRF52840

AndreasF — Thu, 31 Oct 2019 06:34:39 GMT

Hi.

Have you taken a look at the API description?

They are basically the same, only difference is that ble_nus_data_send requires the connection handle to the destination of the message as input.

Best regards,

Andreas

RE: Reading ADC in nRF52840

Jagbir — Wed, 30 Oct 2019 21:00:06 GMT

Thanks Andreas. I was thinking that using the ble_app_uart example with saadc will suit my application more.

The function used in my code “err_code = ble_nus_string_send(&m_nus, my_data_array, BLE_NUS_MAX_DATA_LEN); “ is replaced by following function in latest sdk.

uint32_t ble_nus_data_send(ble_nus_t * p_nus, uint8_t * p_data, uint16_t * p_length, uint16_t conn_handle)

How can I use the new function without sacrificing the original functionality.

void saadc_callback(nrf_drv_saadc_evt_t const * p_event)
{
		static uint8_t my_data_array[BLE_NUS_MAX_DATA_LEN];
		uint8_t index;
		char	out_str[256];
		int total = 0;
		int average = 0;
	
	if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
    {
        ret_code_t err_code;

        err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAMPLES_IN_BUFFER);
        APP_ERROR_CHECK(err_code);

        int i;
        NRF_LOG_INFO("ADC event number: %d\r\n", (int)m_adc_evt_counter);

        for (i = 0; i < SAMPLES_IN_BUFFER; i++)
        {
            NRF_LOG_INFO("%d\r\n", p_event->data.done.p_buffer[i]);
						total += p_event->data.done.p_buffer[i];
        }
        m_adc_evt_counter++;
				average = total / SAMPLES_IN_BUFFER;
				
				// display adc average once every 5 samples
				memset(my_data_array, 0x0, BLE_NUS_MAX_DATA_LEN);
				sprintf(out_str,"ADC val = %d",average);
				for (i=0;i<strlen(out_str);i++)
				{
					my_data_array[i] = (uint8_t)out_str[i];
				}
				err_code = ble_nus_string_send(&m_nus, my_data_array, BLE_NUS_MAX_DATA_LEN);
                                
        NRF_LOG_INFO("ADC val sent: %d\r\n", (int)m_adc_evt_counter);
				memset(my_data_array, 0x0, BLE_NUS_MAX_DATA_LEN);
				
				// get button status and display
				for (index=0;index<=3;index++)
					{
						if (app_button_is_pushed(index))
						{
							sprintf(out_str,"Button %1d = 0",index);
							for (i=0;i<strlen(out_str);i++)
							{
								my_data_array[i] = (uint8_t)out_str[i];
							}
						err_code = ble_nus_string_send(&m_nus, my_data_array, BLE_NUS_MAX_DATA_LEN);
						NRF_LOG_INFO("Button val sent: %d\r\n", index);
						memset(my_data_array, 0x0, BLE_NUS_MAX_DATA_LEN);
						}
						else
						{
							sprintf(out_str,"Button %1d = 1",index);
							for (i=0;i<strlen(out_str);i++)
							{
								my_data_array[i] = (uint8_t)out_str[i];
							}
						err_code = ble_nus_string_send(&m_nus, my_data_array, BLE_NUS_MAX_DATA_LEN);
						NRF_LOG_INFO("Button val sent: %d\r\n", index);
						memset(my_data_array, 0x0, BLE_NUS_MAX_DATA_LEN);
						}
						
					}	
				
				
    }
}

/**
 * Copyright (c) 2014 - 2019, 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.
 *
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 *    engineered, decompiled, modified and/or disassembled.
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 */
/** @file
 *
 * @defgroup ble_sdk_uart_over_ble_main main.c
 * @{
 * @ingroup  ble_sdk_app_nus_eval
 * @brief    UART over BLE application main file.
 *
 * This file contains the source code for a sample application that uses the Nordic UART service.
 * This application uses the @ref srvlib_conn_params module.
 */


#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "ble_hci.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "app_timer.h"
#include "ble_nus.h"
#include "app_uart.h"
#include "app_util_platform.h"
#include "bsp_btn_ble.h"
#include "nrf_pwr_mgmt.h"

// Includes for ADC
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "nrf.h"
#include "nrf_drv_saadc.h"
#include "nrf_drv_ppi.h"
#include "nrf_drv_timer.h"
#include "boards.h"
#include "app_error.h"
#include "nrf_delay.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
//  End of ADC includes

#if defined (UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined (UARTE_PRESENT)
#include "nrf_uarte.h"
#endif

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

#define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */

#define DEVICE_NAME                     "Nordic_UART"                               /**< Name of device. Will be included in the advertising data. */
#define NUS_SERVICE_UUID_TYPE           BLE_UUID_TYPE_VENDOR_BEGIN                  /**< UUID type for the Nordic UART Service (vendor specific). */

#define APP_BLE_OBSERVER_PRIO           3                                           /**< Application's BLE observer priority. You shouldn't need to modify this value. */

#define APP_ADV_INTERVAL                64                                          /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */

#define APP_ADV_DURATION                18000                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */

#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(20, UNIT_1_25_MS)             /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(75, UNIT_1_25_MS)             /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY                   0                                           /**< Slave latency. */
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)             /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(5000)                       /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY   APP_TIMER_TICKS(30000)                      /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT    3                                           /**< Number of attempts before giving up the connection parameter negotiation. */

#define DEAD_BEEF                       0xDEADBEEF                                  /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */

#define UART_TX_BUF_SIZE                256                                         /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE                256                                         /**< UART RX buffer size. */

//Start of defines for ADC
#define SAMPLES_IN_BUFFER 5
volatile uint8_t state = 1;

static const nrf_drv_timer_t m_timer = NRF_DRV_TIMER_INSTANCE(0);
static nrf_saadc_value_t     m_buffer_pool[2][SAMPLES_IN_BUFFER];
static nrf_ppi_channel_t     m_ppi_channel;
static uint32_t              m_adc_evt_counter;
static ble_nus_t             m_nus;                                      /**< Structure to identify the Nordic UART Service. */
static uint16_t              m_conn_handle = BLE_CONN_HANDLE_INVALID;    /**< Handle of the current connection. */
static nrf_ble_gatt_t        m_gatt;                                     /**< GATT module instance. */
static ble_uuid_t            m_adv_uuids[] = {{BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};  /**< Universally unique service identifier. */
static uint16_t              m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3;  /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */

//End of defines for ADC

//Prototype of function for ADC support
void timer_handler(nrf_timer_event_t event_type, void * p_context)
{

}//End of timer handler

void saadc_sampling_event_init(void)
{
    ret_code_t err_code;

    err_code = nrf_drv_ppi_init();
    APP_ERROR_CHECK(err_code);

    nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
    timer_cfg.bit_width = NRF_TIMER_BIT_WIDTH_32;
    err_code = nrf_drv_timer_init(&m_timer, &timer_cfg, timer_handler);
    APP_ERROR_CHECK(err_code);

    /* setup m_timer for compare event every 400ms */
    uint32_t ticks = nrf_drv_timer_ms_to_ticks(&m_timer, 400);
    nrf_drv_timer_extended_compare(&m_timer,
                                   NRF_TIMER_CC_CHANNEL0,
                                   ticks,
                                   NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK,
                                   false);
    nrf_drv_timer_enable(&m_timer);

    uint32_t timer_compare_event_addr = nrf_drv_timer_compare_event_address_get(&m_timer,
                                                                                NRF_TIMER_CC_CHANNEL0);
    uint32_t saadc_sample_task_addr   = nrf_drv_saadc_sample_task_get();

    /* setup ppi channel so that timer compare event is triggering sample task in SAADC */
    err_code = nrf_drv_ppi_channel_alloc(&m_ppi_channel);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_ppi_channel_assign(m_ppi_channel,
                                          timer_compare_event_addr,
                                          saadc_sample_task_addr);
    APP_ERROR_CHECK(err_code);
}


void saadc_sampling_event_enable(void)
{
    ret_code_t err_code = nrf_drv_ppi_channel_enable(m_ppi_channel);

    APP_ERROR_CHECK(err_code);
}


void saadc_callback(nrf_drv_saadc_evt_t const * p_event)
{
		static uint8_t my_data_array[BLE_NUS_MAX_DATA_LEN];
		uint8_t index;
		char	out_str[256];
		int total = 0;
		int average = 0;
	
	if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
    {
        ret_code_t err_code;

        err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAMPLES_IN_BUFFER);
        APP_ERROR_CHECK(err_code);

        int i;
        NRF_LOG_INFO("ADC event number: %d\r\n", (int)m_adc_evt_counter);

        for (i = 0; i < SAMPLES_IN_BUFFER; i++)
        {
            NRF_LOG_INFO("%d\r\n", p_event->data.done.p_buffer[i]);
						total += p_event->data.done.p_buffer[i];
        }
        m_adc_evt_counter++;
				average = total / SAMPLES_IN_BUFFER;
				
				// display adc average once every 5 samples
				memset(my_data_array, 0x0, BLE_NUS_MAX_DATA_LEN);
				sprintf(out_str,"ADC val = %d",average);
				for (i=0;i<strlen(out_str);i++)
				{
					my_data_array[i] = (uint8_t)out_str[i];
				}
				err_code = ble_nus_string_send(&m_nus, my_data_array, BLE_NUS_MAX_DATA_LEN);
                                
        NRF_LOG_INFO("ADC val sent: %d\r\n", (int)m_adc_evt_counter);
				memset(my_data_array, 0x0, BLE_NUS_MAX_DATA_LEN);
				
				// get button status and display
				for (index=0;index<=3;index++)
					{
						if (app_button_is_pushed(index))
						{
							sprintf(out_str,"Button %1d = 0",index);
							for (i=0;i<strlen(out_str);i++)
							{
								my_data_array[i] = (uint8_t)out_str[i];
							}
						err_code = ble_nus_string_send(&m_nus, my_data_array, BLE_NUS_MAX_DATA_LEN);
						NRF_LOG_INFO("Button val sent: %d\r\n", index);
						memset(my_data_array, 0x0, BLE_NUS_MAX_DATA_LEN);
						}
						else
						{
							sprintf(out_str,"Button %1d = 1",index);
							for (i=0;i<strlen(out_str);i++)
							{
								my_data_array[i] = (uint8_t)out_str[i];
							}
						err_code = ble_nus_string_send(&m_nus, my_data_array, BLE_NUS_MAX_DATA_LEN);
						NRF_LOG_INFO("Button val sent: %d\r\n", index);
						memset(my_data_array, 0x0, BLE_NUS_MAX_DATA_LEN);
						}
						
					}	
				
				
    }
}

void saadc_init(void)
{
    ret_code_t err_code;
    nrf_saadc_channel_config_t channel_config =
        NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN0);

    err_code = nrf_drv_saadc_init(NULL, saadc_callback);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_channel_init(0, &channel_config);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[0], SAMPLES_IN_BUFFER);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[1], SAMPLES_IN_BUFFER);
    APP_ERROR_CHECK(err_code);

}





BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT);                                   /**< BLE NUS service instance. */
NRF_BLE_GATT_DEF(m_gatt);                                                           /**< GATT module instance. */
NRF_BLE_QWR_DEF(m_qwr);                                                             /**< Context for the Queued Write module.*/
BLE_ADVERTISING_DEF(m_advertising);                                                 /**< Advertising module instance. */

//static uint16_t   m_conn_handle          = BLE_CONN_HANDLE_INVALID;                 /**< Handle of the current connection. */
//static uint16_t   m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3;            /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
//static ble_uuid_t m_adv_uuids[]          =                                          /**< Universally unique service identifier. */
//{
//   {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}
//};


/**@brief Function for assert macro callback.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyse
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in] line_num    Line number of the failing ASSERT call.
 * @param[in] p_file_name File name of the failing ASSERT call.
 */
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
    app_error_handler(DEAD_BEEF, line_num, p_file_name);
}

/**@brief Function for initializing the timer module.
 */
static void timers_init(void)
{
    ret_code_t err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);
}

/**@brief Function for the GAP initialization.
 *
 * @details This function will set up all the necessary GAP (Generic Access Profile) parameters of
 *          the device. It also sets the permissions and appearance.
 */
static void gap_params_init(void)
{
    uint32_t                err_code;
    ble_gap_conn_params_t   gap_conn_params;
    ble_gap_conn_sec_mode_t sec_mode;

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

    err_code = sd_ble_gap_device_name_set(&sec_mode,
                                          (const uint8_t *) DEVICE_NAME,
                                          strlen(DEVICE_NAME));
    APP_ERROR_CHECK(err_code);

    memset(&gap_conn_params, 0, sizeof(gap_conn_params));

    gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
    gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
    gap_conn_params.slave_latency     = SLAVE_LATENCY;
    gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;

    err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling Queued Write Module errors.
 *
 * @details A pointer to this function will be passed to each service which may need to inform the
 *          application about an error.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void nrf_qwr_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for handling the data from the Nordic UART Service.
 *
 * @details This function will process the data received from the Nordic UART BLE Service and send
 *          it to the UART module.
 *
 * @param[in] p_evt       Nordic UART Service event.
 */
/**@snippet [Handling the data received over BLE] */
static void nus_data_handler(ble_nus_evt_t * p_evt)
{

    if (p_evt->type == BLE_NUS_EVT_RX_DATA)
    {
        uint32_t err_code;

        NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
        NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);

        for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++)
        {
            do
            {
                err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
                if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY))
                {
                    NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
                    APP_ERROR_CHECK(err_code);
                }
            } while (err_code == NRF_ERROR_BUSY);
        }
        if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r')
        {
            while (app_uart_put('\n') == NRF_ERROR_BUSY);
        }
    }

}
/**@snippet [Handling the data received over BLE] */


/**@brief Function for initializing services that will be used by the application.
 */
static void services_init(void)
{
    uint32_t           err_code;
    ble_nus_init_t     nus_init;
    nrf_ble_qwr_init_t qwr_init = {0};

    // Initialize Queued Write Module.
    qwr_init.error_handler = nrf_qwr_error_handler;

    err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
    APP_ERROR_CHECK(err_code);

    // Initialize NUS.
    memset(&nus_init, 0, sizeof(nus_init));

    nus_init.data_handler = nus_data_handler;

    err_code = ble_nus_init(&m_nus, &nus_init);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling an event from the Connection Parameters Module.
 *
 * @details This function will be called for all events in the Connection Parameters Module
 *          which are passed to the application.
 *
 * @note All this function does is to disconnect. This could have been done by simply setting
 *       the disconnect_on_fail config parameter, but instead we use the event handler
 *       mechanism to demonstrate its use.
 *
 * @param[in] p_evt  Event received from the Connection Parameters Module.
 */
static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
{
    uint32_t err_code;

    if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
    {
        err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
        APP_ERROR_CHECK(err_code);
    }
}


/**@brief Function for handling errors from the Connection Parameters module.
 *
 * @param[in] nrf_error  Error code containing information about what went wrong.
 */
static void conn_params_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for initializing the Connection Parameters module.
 */
static void conn_params_init(void)
{
    uint32_t               err_code;
    ble_conn_params_init_t cp_init;

    memset(&cp_init, 0, sizeof(cp_init));

    cp_init.p_conn_params                  = NULL;
    cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
    cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
    cp_init.max_conn_params_update_count   = MAX_CONN_PARAMS_UPDATE_COUNT;
    cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID;
    cp_init.disconnect_on_fail             = false;
    cp_init.evt_handler                    = on_conn_params_evt;
    cp_init.error_handler                  = conn_params_error_handler;

    err_code = ble_conn_params_init(&cp_init);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for putting the chip into sleep mode.
 *
 * @note This function will not return.
 */
static void sleep_mode_enter(void)
{
    uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
    APP_ERROR_CHECK(err_code);

    // Prepare wakeup buttons.
    err_code = bsp_btn_ble_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);

    // Go to system-off mode (this function will not return; wakeup will cause a reset).
    err_code = sd_power_system_off();
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling advertising events.
 *
 * @details This function will be called for advertising events which are passed to the application.
 *
 * @param[in] ble_adv_evt  Advertising event.
 */
static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
{
    uint32_t err_code;

    switch (ble_adv_evt)
    {
        case BLE_ADV_EVT_FAST:
            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
            APP_ERROR_CHECK(err_code);
            break;
        case BLE_ADV_EVT_IDLE:
            sleep_mode_enter();
            break;
        default:
            break;
    }
}


/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
    uint32_t err_code;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            NRF_LOG_INFO("Connected");
            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
            APP_ERROR_CHECK(err_code);
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
            err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GAP_EVT_DISCONNECTED:
            NRF_LOG_INFO("Disconnected");
            // LED indication will be changed when advertising starts.
            m_conn_handle = BLE_CONN_HANDLE_INVALID;
            break;

        case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
        {
            NRF_LOG_DEBUG("PHY update request.");
            ble_gap_phys_t const phys =
            {
                .rx_phys = BLE_GAP_PHY_AUTO,
                .tx_phys = BLE_GAP_PHY_AUTO,
            };
            err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
            APP_ERROR_CHECK(err_code);
        } break;

        case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
            // Pairing not supported
            err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTS_EVT_SYS_ATTR_MISSING:
            // No system attributes have been stored.
            err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTC_EVT_TIMEOUT:
            // Disconnect on GATT Client timeout event.
            err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTS_EVT_TIMEOUT:
            // Disconnect on GATT Server timeout event.
            err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
            break;

        default:
            // No implementation needed.
            break;
    }
}


/**@brief Function for the SoftDevice initialization.
 *
 * @details This function initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void)
{
    ret_code_t err_code;

    err_code = nrf_sdh_enable_request();
    APP_ERROR_CHECK(err_code);

    // Configure the BLE stack using the default settings.
    // Fetch the start address of the application RAM.
    uint32_t ram_start = 0;
    err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
    APP_ERROR_CHECK(err_code);

    // Enable BLE stack.
    err_code = nrf_sdh_ble_enable(&ram_start);
    APP_ERROR_CHECK(err_code);

    // Register a handler for BLE events.
    NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}


/**@brief Function for handling events from the GATT library. */
void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
{
    if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED))
    {
        m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
        NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
    }
    NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
                  p_gatt->att_mtu_desired_central,
                  p_gatt->att_mtu_desired_periph);
}


/**@brief Function for initializing the GATT library. */
void gatt_init(void)
{
    ret_code_t err_code;

    err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated by button press.
 */
void bsp_event_handler(bsp_event_t event)
{
    uint32_t err_code;
    switch (event)
    {
        case BSP_EVENT_SLEEP:
            sleep_mode_enter();
            break;

        case BSP_EVENT_DISCONNECT:
            err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            if (err_code != NRF_ERROR_INVALID_STATE)
            {
                APP_ERROR_CHECK(err_code);
            }
            break;

        case BSP_EVENT_WHITELIST_OFF:
            if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
            {
                err_code = ble_advertising_restart_without_whitelist(&m_advertising);
                if (err_code != NRF_ERROR_INVALID_STATE)
                {
                    APP_ERROR_CHECK(err_code);
                }
            }
            break;

        default:
            break;
    }
}


/**@brief   Function for handling app_uart events.
 *
 * @details This function will receive a single character from the app_uart module and append it to
 *          a string. The string will be be sent over BLE when the last character received was a
 *          'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length.
 */
/**@snippet [Handling the data received over UART] */
void uart_event_handle(app_uart_evt_t * p_event)
{
    static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
    static uint8_t index = 0;
    uint32_t       err_code;

    switch (p_event->evt_type)
    {
        case APP_UART_DATA_READY:
            UNUSED_VARIABLE(app_uart_get(&data_array[index]));
            index++;

            if ((data_array[index - 1] == '\n') ||
                (data_array[index - 1] == '\r') ||
                (index >= m_ble_nus_max_data_len))
            {
                if (index > 1)
                {
                    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_array, index);

                    do
                    {
                        uint16_t length = (uint16_t)index;
                        err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                            APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);
                }

                index = 0;
            }
            break;

        case APP_UART_COMMUNICATION_ERROR:
            APP_ERROR_HANDLER(p_event->data.error_communication);
            break;

        case APP_UART_FIFO_ERROR:
            APP_ERROR_HANDLER(p_event->data.error_code);
            break;

        default:
            break;
    }
}
/**@snippet [Handling the data received over UART] */


/**@brief  Function for initializing the UART module.
 */
/**@snippet [UART Initialization] */
static void uart_init(void)
{
    uint32_t                     err_code;
    app_uart_comm_params_t const comm_params =
    {
        .rx_pin_no    = RX_PIN_NUMBER,
        .tx_pin_no    = TX_PIN_NUMBER,
        .rts_pin_no   = RTS_PIN_NUMBER,
        .cts_pin_no   = CTS_PIN_NUMBER,
        .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
        .use_parity   = false,
#if defined (UART_PRESENT)
        .baud_rate    = NRF_UART_BAUDRATE_115200
#else
        .baud_rate    = NRF_UARTE_BAUDRATE_115200
#endif
    };

    APP_UART_FIFO_INIT(&comm_params,
                       UART_RX_BUF_SIZE,
                       UART_TX_BUF_SIZE,
                       uart_event_handle,
                       APP_IRQ_PRIORITY_LOWEST,
                       err_code);
    APP_ERROR_CHECK(err_code);
}
/**@snippet [UART Initialization] */


/**@brief Function for initializing the Advertising functionality.
 */
static void advertising_init(void)
{
    uint32_t               err_code;
    ble_advertising_init_t init;

    memset(&init, 0, sizeof(init));

    init.advdata.name_type          = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance = false;
    init.advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

    init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    init.srdata.uuids_complete.p_uuids  = m_adv_uuids;

    init.config.ble_adv_fast_enabled  = true;
    init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;
    init.evt_handler = on_adv_evt;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}


/**@brief Function for initializing buttons and leds.
 *
 * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
 */
static void buttons_leds_init(bool * p_erase_bonds)
{
    bsp_event_t startup_event;

    uint32_t err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_btn_ble_init(NULL, &startup_event);
    APP_ERROR_CHECK(err_code);

    *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}


/**@brief Function for initializing the nrf log module.
 */
static void log_init(void)
{
    ret_code_t err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEFAULT_BACKENDS_INIT();
}


/**@brief Function for initializing power management.
 */
static void power_management_init(void)
{
    ret_code_t err_code;
    err_code = nrf_pwr_mgmt_init();
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling the idle state (main loop).
 *
 * @details If there is no pending log operation, then sleep until next the next event occurs.
 */
static void idle_state_handle(void)
{
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}


/**@brief Function for starting advertising.
 */
static void advertising_start(void)
{
    uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);
}


/**@brief Application main function.
 */
int main(void)
{
    bool erase_bonds;

    // Initialize.
    uart_init();
    log_init();
    timers_init();
    buttons_leds_init(&erase_bonds);
    power_management_init();
    ble_stack_init();
    gap_params_init();
    gatt_init();
    services_init();
    advertising_init();
    conn_params_init();

    // Start execution.
   ret_code_t ret_code = nrf_pwr_mgmt_init();
    APP_ERROR_CHECK(ret_code);

    saadc_init();
    saadc_sampling_event_init();
    saadc_sampling_event_enable();
    NRF_LOG_INFO("UART SAADC HAL simple example started.");

    advertising_start();

    // Enter main loop.
    for (;;)
    {
        nrf_pwr_mgmt_run();
        NRF_LOG_FLUSH();    }
}


/**
 * @}
 */

RE: Reading ADC in nRF52840

AndreasF — Wed, 30 Oct 2019 09:23:42 GMT

Hi.

The first issue you have is that you try to initialize logging twice.

Please remove:

     //uint32_t err_code = NRF_LOG_INIT(NULL);
    //APP_ERROR_CHECK(err_code);

    //NRF_LOG_DEFAULT_BACKENDS_INIT();

from main(void).

Second problem i spotted is in saadc_sampling_event_init() -> nrf_drv_timer_init();

This assert triggers:

Best regards,

Andreas

RE: Reading ADC in nRF52840

Jagbir — Tue, 29 Oct 2019 18:11:20 GMT

Uploaded nRF5_SDK_16.0.0_98a08e2_Modified.zip with modified "examples\ble_peripheral\ble_app_hts\pca10056\s140\ses"

devzone.nordicsemi.com/.../nRF5_5F00_SDK_5F00_16.0.0_5F00_98a08e2_5F00_Modified.zip

RE: Reading ADC in nRF52840

Jagbir — Tue, 29 Oct 2019 13:30:58 GMT

Yes. nRF log is enabled except back end RTT.

RE: Reading ADC in nRF52840

AndreasF — Tue, 29 Oct 2019 13:19:51 GMT

Hi.

Have you enabled the logging?

Best regards,

Andreas

RE: Reading ADC in nRF52840

Jagbir — Tue, 29 Oct 2019 11:47:29 GMT

int main(void)
{
bool erase_bonds;

// Initialize.
log_init();

I have found that the function log_init() always results in break point condition.

NRF_BREAKPOINT_COND;

// On assert, the system can only recover with a reset.

RE: Reading ADC in nRF52840

AndreasF — Tue, 29 Oct 2019 07:30:54 GMT

Hi.

Have you tried to debug the project and see why it ends up in the breakpoint condition?

Best regards,

Andreas

RE: Reading ADC in nRF52840

Jagbir — Mon, 28 Oct 2019 21:12:05 GMT

Thanks for your help.

I was able to remove all build errors by importing the remaining C files.

After building it, once I run the program then I am getting following error message.

NRF_BREAKPOINT_COND;

// On assert, the system can only recover with a reset.

In the end, I am trying(not implemented) to copy the adc buffer data to the ble packet and receiver the transmission in the smartphone app.I should be able the visualize the ADC data in RTT.

RE: Reading ADC in nRF52840

Jagbir — Mon, 28 Oct 2019 13:55:13 GMT

Hi,

After using this sdk_config.h file, I am getting following errors.

Building ‘ble_app_hrs_pca10056_s140’ from solution ‘ble_app_hrs_pca10056_s140’ in configuration ‘Release’
  Compiling ‘bsp.c’
  Compiling ‘nrf_hw_backend_init.c’
  Compiling ‘bsp_btn_ble.c’
  Compiling ‘nrf_hw_backend_rng.c’
  Compiling ‘nrf_hw_backend_rng_mbedtls.c’
  Compiling ‘app_button.c’
  Compiling ‘app_error_handler_gcc.c’
  Compiling ‘app_error_weak.c’
  Compiling ‘app_scheduler.c’
  Compiling ‘app_timer.c’
  Compiling ‘crc16.c’
  Compiling ‘fds.c’
  Compiling ‘hardfault_implementation.c’
  Compiling ‘mem_manager.c’
  Compiling ‘nrf_atfifo.c’
  Compiling ‘nrf_atflags.c’
  Compiling ‘nrf_atomic.c’
  Compiling ‘nrf_fprintf_format.c’
  Compiling ‘nrf_fprintf.c’
  Compiling ‘nrf_balloc.c’
  Compiling ‘nrf_fstorage.c’
  Compiling ‘nrf_memobj.c’
  Compiling ‘nrf_fstorage_sd.c’
  Compiling ‘nrf_pwr_mgmt.c’
  Compiling ‘nrf_queue.c’
  Compiling ‘nrf_ringbuf.c’
  Compiling ‘nrf_section_iter.c’
  Compiling ‘nrf_strerror.c’
  Compiling ‘nrf_drv_clock.c’
  Compiling ‘nrf_drv_uart.c’
  Compiling ‘nrf_drv_rng.c’
  Compiling ‘nrfx_atomic.c’
  Compiling ‘nrfx_clock.c’
  Compiling ‘nrfx_gpiote.c’
  Compiling ‘nrfx_prs.c’
  Compiling ‘nrfx_rng.c’
  Compiling ‘nrfx_uart.c’
  Compiling ‘nrfx_uarte.c’
  Compiling ‘boards.c’
  Compiling ‘nrf_log_backend_rtt.c’
  Compiling ‘nrf_log_backend_serial.c’
  Compiling ‘nrf_log_backend_uart.c’
  Compiling ‘nrf_log_default_backends.c’
  Compiling ‘nrf_log_frontend.c’
  Compiling ‘nrf_log_str_formatter.c’
  Compiling ‘ctr_drbg.c’
  Compiling ‘aes.c’
  Compiling ‘nrf_crypto_aes.c’
  Compiling ‘nrf_crypto_aead.c’
  Compiling ‘nrf_crypto_aes_shared.c’
  Compiling ‘nrf_crypto_ecc.c’
  Compiling ‘nrf_crypto_ecdh.c’
  Compiling ‘nrf_crypto_ecdsa.c’
  Compiling ‘nrf_crypto_eddsa.c’
  Compiling ‘nrf_crypto_error.c’
  Compiling ‘nrf_crypto_hash.c’
  Compiling ‘nrf_crypto_hkdf.c’
  Compiling ‘nrf_crypto_hmac.c’
  Compiling ‘nrf_crypto_init.c’
  Compiling ‘nrf_crypto_rng.c’
  Compiling ‘nrf_crypto_shared.c’
  Compiling ‘main.c’
  Compiling ‘SEGGER_RTT.c’
  Compiling ‘SEGGER_RTT_Syscalls_SES.c’
  Compiling ‘SEGGER_RTT_printf.c’
  Compiling ‘cc310_backend_aes.c’
  Compiling ‘cc310_backend_aes_aead.c’
  Compiling ‘cc310_backend_chacha_poly_aead.c’
  Compiling ‘cc310_backend_ecc.c’
  Compiling ‘cc310_backend_ecdh.c’
  Compiling ‘cc310_backend_ecdsa.c’
  Compiling ‘cc310_backend_eddsa.c’
  Compiling ‘cc310_backend_hash.c’
  Compiling ‘cc310_backend_hmac.c’
  Compiling ‘cc310_backend_init.c’
  Compiling ‘cc310_backend_mutex.c’
  Compiling ‘cc310_backend_rng.c’
  Compiling ‘cc310_backend_shared.c’
  Compiling ‘auth_status_tracker.c’
  Compiling ‘ble_advdata.c’
  Compiling ‘ble_advertising.c’
  Compiling ‘ble_conn_params.c’
  Compiling ‘ble_conn_state.c’
  Compiling ‘ble_srv_common.c’
  Compiling ‘gatt_cache_manager.c’
  Compiling ‘gatts_cache_manager.c’
  Compiling ‘id_manager.c’
  Compiling ‘nrf_ble_gatt.c’
  Compiling ‘nrf_ble_lesc.c’
  Compiling ‘nrf_ble_qwr.c’
  Compiling ‘peer_data_storage.c’
  Compiling ‘peer_database.c’
  Compiling ‘peer_id.c’
  Compiling ‘peer_manager.c’
  Compiling ‘peer_manager_handler.c’
  Compiling ‘pm_buffer.c’
  Compiling ‘security_dispatcher.c’
  Compiling ‘security_manager.c’
  Compiling ‘utf.c’
  Compiling ‘ble_bas.c’
  Compiling ‘ble_dis.c’
  Compiling ‘ble_hrs.c’
  Compiling ‘nrf_sdh.c’
  Compiling ‘nrf_sdh_ble.c’
  Compiling ‘nrf_sdh_soc.c’
  Compiling ‘oberon_backend_chacha_poly_aead.c’
  Compiling ‘oberon_backend_ecc.c’
  Compiling ‘oberon_backend_ecdh.c’
  Compiling ‘oberon_backend_ecdsa.c’
  Compiling ‘oberon_backend_eddsa.c’
  Compiling ‘oberon_backend_hash.c’
  Compiling ‘oberon_backend_hmac.c’
  Linking ble_app_hrs_pca10056_s140.elf
    Output/ble_app_hrs_pca10056_s140 Release/Obj/main.o: in function `saadc_callback':
    undefined reference to `nrfx_saadc_buffer_convert'
    Output/ble_app_hrs_pca10056_s140 Release/Obj/main.o: in function `saadc_sampling_event_init':
    undefined reference to `nrf_drv_ppi_init'
    C:\Users\30709741\Downloads\SDKs\nRF5_SDK_15.3.0_59ac345_Modified\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs/main.c:170: undefined reference to `nrfx_timer_init'
    C:\Users\30709741\Downloads\SDKs\nRF5_SDK_15.3.0_59ac345_Modified\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs/main.c:175: undefined reference to `nrfx_timer_extended_compare'
    C:\Users\30709741\Downloads\SDKs\nRF5_SDK_15.3.0_59ac345_Modified\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs/main.c:180: undefined reference to `nrfx_timer_enable'
    C:\Users\30709741\Downloads\SDKs\nRF5_SDK_15.3.0_59ac345_Modified\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs/main.c:184: undefined reference to `nrfx_saadc_sample_task_get'
    C:\Users\30709741\Downloads\SDKs\nRF5_SDK_15.3.0_59ac345_Modified\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs/main.c:187: undefined reference to `nrfx_ppi_channel_alloc'
    C:\Users\30709741\Downloads\SDKs\nRF5_SDK_15.3.0_59ac345_Modified\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs/main.c:190: undefined reference to `nrfx_ppi_channel_assign'
    Output/ble_app_hrs_pca10056_s140 Release/Obj/main.o: in function `saadc_sampling_event_enable':
    undefined reference to `nrfx_ppi_channel_enable'
    Output/ble_app_hrs_pca10056_s140 Release/Obj/main.o: in function `nrf_drv_saadc_init':
    undefined reference to `nrfx_saadc_init'
    Output/ble_app_hrs_pca10056_s140 Release/Obj/main.o: in function `saadc_init':
    undefined reference to `nrfx_saadc_channel_init'
    C:\Users\30709741\Downloads\SDKs\nRF5_SDK_15.3.0_59ac345_Modified\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs/main.c:238: undefined reference to `nrfx_saadc_buffer_convert'
    C:\Users\30709741\Downloads\SDKs\nRF5_SDK_15.3.0_59ac345_Modified\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs/main.c:241: undefined reference to `nrfx_saadc_buffer_convert'
Build failed

RE: Reading ADC in nRF52840

AndreasF — Mon, 28 Oct 2019 13:38:22 GMT

Hi.

I've enabled a timer instance, PPI and SAADC in this sdk_config.h file: devzone.nordicsemi.com/.../sdk_5F00_config.h

Best regards,

Andreas

RE: Reading ADC in nRF52840

Jagbir — Mon, 28 Oct 2019 13:14:46 GMT

Can anyone provide a solution for this problem.