1 /*
2 * Author: Jon Trulson <jtrulson@ics.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
25 #include <unistd.h>
26 #include <iostream>
27 #include <signal.h>
28 #include "gp2y0a.h"
29
30 using namespace std;
31
32 bool shouldRun = true;
33
34 // analog voltage, usually 3.3 or 5.0
35 #define GP2Y0A_AREF 5.0
36 #define SAMPLES_PER_QUERY 20
37
sig_handler(int signo)38 void sig_handler(int signo)
39 {
40 if (signo == SIGINT)
41 shouldRun = false;
42 }
43
main()44 int main()
45 {
46 signal(SIGINT, sig_handler);
47
48 //! [Interesting]
49 // Note, for the Grove 80cm version of this sensor, due to the way
50 // it is wired, you need to plug this into the A0 port, where it
51 // will use the available A1 pin for data.
52
53 // Instantiate a GP2Y0A on analog pin A1
54 upm::GP2Y0A *volts = new upm::GP2Y0A(1);
55
56 // The higher the voltage (closer to AREF) the closer the object is. NOTE:
57 // the measured voltage will probably not exceed 3.3 volts.
58 // Every second, print the averaged voltage value (averaged over 20 samples).
59 while (shouldRun)
60 {
61 cout << "AREF: " << GP2Y0A_AREF
62 << ", Voltage value (higher means closer): "
63 << volts->value(GP2Y0A_AREF, SAMPLES_PER_QUERY) << endl;
64
65 sleep(1);
66 }
67 //! [Interesting]
68
69 cout << "Exiting" << endl;
70
71 delete volts;
72 return 0;
73 }
74