|
|
/**
* Copyright (c) 2015 - 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. * * 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 capacitive_sensor_example_main main.c * @{ * @ingroup capacitive_sensor_example * @brief Capacitive Sensor Example main file. * * This file contains the source code for a sample application that uses a capacitive sensor. * */
#include <stdio.h>
#include <string.h>
#include "boards.h"
#include "nrf_csense.h"
#include "app_error.h"
#include "nrf_drv_clock.h"
#include "app_timer.h"
#include "nrf_delay.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
/* Time between RTC interrupts. */#define APP_TIMER_TICKS_TIMEOUT APP_TIMER_TICKS(50)
/* Scale range. */#define RANGE 50
/* Analog inputs. */#define AIN1 1
#define AIN2 2
#define AIN3 3
#define AIN4 4
#define AIN7 7
/* Definition which pads use which analog inputs. */#define BUTTON AIN7
#define PAD1 AIN4
#define PAD4 AIN4
#ifdef NRF51
#define PAD2 AIN2
#define PAD3 AIN3
#else
#define PAD2 AIN1
#define PAD3 AIN2
#endif
/* Threshold values for pads and button. */#define THRESHOLD_PAD_1 400
#define THRESHOLD_PAD_2 400
#define THRESHOLD_PAD_3 400
#define THRESHOLD_PAD_4 400
#define THRESHOLD_BUTTON 400
/*lint -e19 -save */NRF_CSENSE_BUTTON_DEF(m_button, (BUTTON, THRESHOLD_BUTTON));NRF_CSENSE_SLIDER_4_DEF(m_slider, RANGE, (PAD1, THRESHOLD_PAD_1), (PAD2, THRESHOLD_PAD_2), (PAD3, THRESHOLD_PAD_3), (PAD4, THRESHOLD_PAD_4));/*lint -restore*/
/**
* @brief Function for starting the internal LFCLK XTAL oscillator. * * Note that when using a SoftDevice, LFCLK is always on. * * @return Values returned by @ref nrf_drv_clock_init. */static ret_code_t clock_config(void){ ret_code_t err_code;
err_code = nrf_drv_clock_init(); if (err_code != NRF_SUCCESS) { return err_code; }
nrf_drv_clock_lfclk_request(NULL);
return NRF_SUCCESS;}
/**
* @brief Function for handling slider interrupts. * * @param[in] step Detected step. */static void slider_handler(uint16_t step){ static uint16_t slider_val; if (slider_val != step) { NRF_LOG_INFO("Slider value: %03d.", step); slider_val = step; }}
/**
* @brief Event handler for Capacitive Sensor High module. * * @param [in] p_evt_type Pointer to event data structure. */void nrf_csense_handler(nrf_csense_evt_t * p_evt){ switch (p_evt->nrf_csense_evt_type) { case NRF_CSENSE_BTN_EVT_PRESSED: break; case NRF_CSENSE_BTN_EVT_RELEASED: if (p_evt->p_instance == (&m_button)) { uint16_t * btn_cnt = ((uint16_t *)p_evt->p_instance->p_context); (*btn_cnt)++; NRF_LOG_INFO("Button touched %03d times.", (*btn_cnt)); } break; case NRF_CSENSE_SLIDER_EVT_PRESSED: case NRF_CSENSE_SLIDER_EVT_RELEASED: break; case NRF_CSENSE_SLIDER_EVT_DRAGGED: if ((p_evt->p_instance == (&m_slider)) && (p_evt->params.slider.step != UINT16_MAX)) { /*lint -e611 -save */ ((void(*)(uint16_t, uint8_t))p_evt->p_instance->p_context)(p_evt->params.slider.step, 2); /*lint -restore*/ } break; default: NRF_LOG_WARNING("Unknown event."); break; }}
/**
* @brief Function for starting Capacitive Sensor High module. * * Function enables one slider and one button. */static void csense_start(void){ ret_code_t err_code;
static uint16_t touched_counter = 0;
err_code = nrf_csense_init(nrf_csense_handler, APP_TIMER_TICKS_TIMEOUT); APP_ERROR_CHECK(err_code);
nrf_csense_instance_context_set(&m_button, (void*)&touched_counter); nrf_csense_instance_context_set(&m_slider, (void*)slider_handler);
err_code = nrf_csense_add(&m_button); APP_ERROR_CHECK(err_code);
err_code = nrf_csense_add(&m_slider); APP_ERROR_CHECK(err_code);}
/**
* @brief Function for main application entry. */int main(void){ ret_code_t err_code;
err_code = NRF_LOG_INIT(NULL); APP_ERROR_CHECK(err_code);
NRF_LOG_DEFAULT_BACKENDS_INIT();
err_code = app_timer_init(); APP_ERROR_CHECK(err_code);
err_code = clock_config(); APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Capacitive sensing library example started.");
csense_start();
while (1) { __WFI(); NRF_LOG_FLUSH(); }}
/** @} */
|
