1 /*
2  * Author: Zion Orent <zorent@ics.com>
3  * Copyright (c) 2015 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/aio.h>
28 
29 namespace upm {
30   /**
31    * @brief INA132 Differential Amplifier Sensor library
32    * @defgroup ina132 libupm-ina132
33    * @ingroup seeed analog electric
34    */
35   /**
36    * @library ina132
37    * @sensor ina132
38    * @comname Grove Differential Amplifier
39    * @altname INA132
40    * @type electric
41    * @man seeed
42    * @con analog
43    *
44    * @brief API for the INA132 Differential Amplifier Sensor
45    *
46    * The INA132 Differential Amplifier Sensor is designed
47    * for precise differential-input amplification.
48    *
49    * This sensor was tested amplifying the signal
50    * from a Weight Sensor (Load Cell) 0-500g
51    *
52    * @image html ina132.jpg
53    * @snippet ina132.cxx Interesting
54    */
55   class INA132 {
56   public:
57     /**
58      * INA132 constructor
59      *
60      * @param pin Analog pin to use
61      */
62     INA132(int pin);
63     /**
64      * INA132 destructor
65      */
66     ~INA132();
67 
68     /**
69      * Measures precise differential-input amplification from the sensor
70      *
71      * @return Precise differential-input amplification
72      */
73     float value();
74 
75   private:
76     mraa_aio_context m_aio;
77   };
78 }
79 
80 
81