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
25 #include <iostream>
26 #include <string>
27 #include <stdexcept>
28 #include <unistd.h>
29
30 #include "ina132.h"
31
32 using namespace upm;
33 using namespace std;
34
INA132(int pin)35 INA132::INA132(int pin)
36 {
37 if ( !(m_aio = mraa_aio_init(pin)) )
38 {
39 throw std::invalid_argument(std::string(__FUNCTION__) +
40 ": mraa_aio_init() failed, invalid pin?");
41 return;
42 }
43 }
44
~INA132()45 INA132::~INA132()
46 {
47 mraa_aio_close(m_aio);
48 }
49
value()50 float INA132::value()
51 {
52 int val, i;
53 float v, vo;
54 float sum=0;
55 for(i=0;i<10;i++)
56 {
57 val = mraa_aio_read(m_aio);
58 v = val*5.00/1023;
59 sum += v;
60 usleep(10000);
61 }
62 vo = sum/10;
63 return vo;
64 }
65