upm  1.6.0
Sensor/Actuator repository for libmraa (v1.9.0)
mic.hpp
1 /*
2  * Author: Brendan Le Foll <brendan.le.foll@intel.com>
3  * Copyright (c) 2014 Intel Corporation.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be
14  * included in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  */
24 #pragma once
25 
26 #include <string>
27 #include <mraa/gpio.h>
28 #include <mraa/aio.h>
29 
30 struct thresholdContext {
31  long averageReading;
32  unsigned long runningAverage;
33  int averagedOver;
34 };
35 
36 namespace upm {
37 
61 class Microphone {
62  public:
68  Microphone(int micPin);
69 
73  ~Microphone();
74 
83  int getSampledWindow (unsigned int freqMS, int numberOfSamples, uint16_t * buffer);
84 
94  int findThreshold (thresholdContext* ctx, unsigned int threshold, uint16_t * buffer, int len);
95 
102  void printGraph (thresholdContext* ctx);
103 
104  private:
105  mraa_aio_context m_micCtx;
106 };
107 
108 }
C++ API for the kxtj3 driver.
Definition: a110x.hpp:29
Definition: gas.hpp:29
API for the Analog Microphone.
Definition: mic.hpp:61