/* * Author: Brendan Le Foll * Copyright (c) 2014 Intel Corporation. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #pragma once #include #include #include struct thresholdContext { long averageReading; long runningAverage; int averagedOver; }; namespace upm { /** * @brief analog microphone library * @defgroup mic libupm-mic */ /** * @brief C++ API for Microphone * * This file defines the Microphone Analog sensor * * @ingroup mic * @snippet mic-example.cxx Interesting */ class Microphone { public: /** * Instanciates a Microphone object * * @param micPin pin where microphone is connected */ Microphone(int micPin); /** * MAX31723 object destructor */ ~Microphone(); /** * Get samples from microphone according to provided window and * number of samples * * @param freqMS time between each sample (in microseconds) * @param numberOfSamples number of sample to sample for this window * @param buffer bufer with sampled data */ int getSampledWindow (unsigned int freqMS, unsigned int numberOfSamples, uint16_t * buffer); /** * Given sampled buffer this method will return TRUE/FALSE if threshold * was reached * * @param ctx threshold context * @param threshold sample threshold * @param buffer buffer with samples * @param len bufer len */ int findThreshold (thresholdContext* ctx, unsigned int threshold, uint16_t * buffer, unsigned int len); /** * * Print running average of threshold context * * @param ctx threshold context */ void printGraph (thresholdContext* ctx); private: mraa_aio_context m_micCtx; }; }