1 /*
2 * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@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
25 #include <iostream>
26 #include <string>
27 #include <stdexcept>
28 #include <unistd.h>
29
30 #include "buzzer.h"
31
32 using namespace upm;
33 using namespace std;
34
Buzzer(int pinNumber)35 Buzzer::Buzzer(int pinNumber) {
36 m_pwm_context = mraa_pwm_init(pinNumber);
37 if(m_pwm_context == 0)
38 {
39 throw std::invalid_argument(std::string(__FUNCTION__) +
40 ": mraa_pwm_init() failed, invalid pin?");
41 return;
42 }
43 m_name = "Buzzer";
44 mraa_pwm_enable (m_pwm_context, 1);
45 Buzzer::setVolume(1.0);
46 }
47
setVolume(float vol)48 void Buzzer::setVolume(float vol){
49 m_volume = vol;
50 }
51
getVolume()52 float Buzzer::getVolume(){
53 return m_volume;
54 }
55
playSound(int note,int delay)56 int Buzzer::playSound(int note, int delay) {
57 mraa_pwm_period_us(m_pwm_context, note);
58 mraa_pwm_write(m_pwm_context, m_volume * 0.5);
59 if(delay){
60 usleep(delay);
61 Buzzer::stopSound();
62 }
63 return note;
64 }
65
stopSound()66 void Buzzer::stopSound(){
67 // Has to be checked out on a scope and make sure it's flat 0
68 mraa_pwm_period_us(m_pwm_context, 1);
69 mraa_pwm_write(m_pwm_context, 0);
70 }
71
~Buzzer()72 Buzzer::~Buzzer() {
73 Buzzer::stopSound();
74 mraa_pwm_enable(m_pwm_context, 0);
75 mraa_pwm_close(m_pwm_context);
76 }
77
78