234 lines
7.0 KiB
C
234 lines
7.0 KiB
C
/**
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* Copyright (c) 2015 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/** @file
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* @defgroup capacitive_sensor_example_main main.c
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* @{
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* @ingroup capacitive_sensor_example
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* @brief Capacitive Sensor Example main file.
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*
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* This file contains the source code for a sample application that uses a capacitive sensor.
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include "boards.h"
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#include "nrf_csense.h"
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#include "app_error.h"
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#include "nrf_drv_clock.h"
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#include "app_timer.h"
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#include "nrf_delay.h"
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#include "nrf_log.h"
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#include "nrf_log_ctrl.h"
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#include "nrf_log_default_backends.h"
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/* Time between RTC interrupts. */
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#define APP_TIMER_TICKS_TIMEOUT APP_TIMER_TICKS(50)
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/* Scale range. */
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#define RANGE 50
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/* Analog inputs. */
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#define AIN1 1
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#define AIN2 2
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#define AIN3 3
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#define AIN4 4
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#define AIN7 7
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/* Definition which pads use which analog inputs. */
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#define BUTTON AIN7
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#define PAD1 AIN4
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#define PAD4 AIN4
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#ifdef NRF51
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#define PAD2 AIN2
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#define PAD3 AIN3
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#else
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#define PAD2 AIN1
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#define PAD3 AIN2
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#endif
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/* Threshold values for pads and button. */
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#define THRESHOLD_PAD_1 400
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#define THRESHOLD_PAD_2 400
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#define THRESHOLD_PAD_3 400
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#define THRESHOLD_PAD_4 400
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#define THRESHOLD_BUTTON 400
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/*lint -e19 -save */
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NRF_CSENSE_BUTTON_DEF(m_button, (BUTTON, THRESHOLD_BUTTON));
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NRF_CSENSE_SLIDER_4_DEF(m_slider,
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RANGE,
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(PAD1, THRESHOLD_PAD_1),
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(PAD2, THRESHOLD_PAD_2),
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(PAD3, THRESHOLD_PAD_3),
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(PAD4, THRESHOLD_PAD_4));
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/*lint -restore*/
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/**
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* @brief Function for starting the internal LFCLK XTAL oscillator.
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*
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* Note that when using a SoftDevice, LFCLK is always on.
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*
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* @return Values returned by @ref nrf_drv_clock_init.
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*/
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static ret_code_t clock_config(void)
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{
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ret_code_t err_code;
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err_code = nrf_drv_clock_init();
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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nrf_drv_clock_lfclk_request(NULL);
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return NRF_SUCCESS;
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}
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/**
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* @brief Function for handling slider interrupts.
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*
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* @param[in] step Detected step.
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*/
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static void slider_handler(uint16_t step)
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{
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static uint16_t slider_val;
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if (slider_val != step)
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{
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NRF_LOG_INFO("Slider value: %03d.", step);
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slider_val = step;
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}
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}
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/**
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* @brief Event handler for Capacitive Sensor High module.
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*
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* @param [in] p_evt_type Pointer to event data structure.
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*/
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void nrf_csense_handler(nrf_csense_evt_t * p_evt)
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{
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switch (p_evt->nrf_csense_evt_type)
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{
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case NRF_CSENSE_BTN_EVT_PRESSED:
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break;
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case NRF_CSENSE_BTN_EVT_RELEASED:
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if (p_evt->p_instance == (&m_button))
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{
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uint16_t * btn_cnt = ((uint16_t *)p_evt->p_instance->p_context);
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(*btn_cnt)++;
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NRF_LOG_INFO("Button touched %03d times.", (*btn_cnt));
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}
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break;
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case NRF_CSENSE_SLIDER_EVT_PRESSED:
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case NRF_CSENSE_SLIDER_EVT_RELEASED:
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break;
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case NRF_CSENSE_SLIDER_EVT_DRAGGED:
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if ((p_evt->p_instance == (&m_slider)) && (p_evt->params.slider.step != UINT16_MAX))
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{
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/*lint -e611 -save */
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((void(*)(uint16_t, uint8_t))p_evt->p_instance->p_context)(p_evt->params.slider.step, 2);
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/*lint -restore*/
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}
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break;
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default:
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NRF_LOG_WARNING("Unknown event.");
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break;
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}
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}
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/**
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* @brief Function for starting Capacitive Sensor High module.
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*
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* Function enables one slider and one button.
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*/
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static void csense_start(void)
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{
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ret_code_t err_code;
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static uint16_t touched_counter = 0;
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err_code = nrf_csense_init(nrf_csense_handler, APP_TIMER_TICKS_TIMEOUT);
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APP_ERROR_CHECK(err_code);
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nrf_csense_instance_context_set(&m_button, (void*)&touched_counter);
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nrf_csense_instance_context_set(&m_slider, (void*)slider_handler);
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err_code = nrf_csense_add(&m_button);
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APP_ERROR_CHECK(err_code);
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err_code = nrf_csense_add(&m_slider);
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APP_ERROR_CHECK(err_code);
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}
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/**
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* @brief Function for main application entry.
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*/
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int main(void)
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{
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ret_code_t err_code;
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err_code = NRF_LOG_INIT(NULL);
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APP_ERROR_CHECK(err_code);
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NRF_LOG_DEFAULT_BACKENDS_INIT();
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err_code = app_timer_init();
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APP_ERROR_CHECK(err_code);
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err_code = clock_config();
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APP_ERROR_CHECK(err_code);
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NRF_LOG_INFO("Capacitive sensing library example started.");
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csense_start();
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while (1)
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{
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__WFI();
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NRF_LOG_FLUSH();
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}
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}
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/** @} */
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