1 /*
2 * Author: Jon Trulson <jtrulson@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
29 #include "rpr220.h"
30
31 using namespace upm;
32 using namespace std;
33
RPR220(int pin)34 RPR220::RPR220(int pin)
35 {
36 m_isrInstalled = false;
37
38 if ( !(m_gpio = mraa_gpio_init(pin)) )
39 {
40 throw std::invalid_argument(std::string(__FUNCTION__) +
41 ": mraa_gpio_init() failed, invalid pin?");
42 return;
43 }
44
45 mraa_gpio_dir(m_gpio, MRAA_GPIO_IN);
46 }
47
~RPR220()48 RPR220::~RPR220()
49 {
50 if (m_isrInstalled)
51 uninstallISR();
52
53 mraa_gpio_close(m_gpio);
54 }
55
blackDetected()56 bool RPR220::blackDetected()
57 {
58 return (mraa_gpio_read(m_gpio) ? true : false);
59 }
60
61 #ifdef JAVACALLBACK
installISR(IsrCallback * cb)62 void RPR220::installISR(IsrCallback *cb)
63 {
64 installISR(generic_callback_isr, cb);
65 }
66 #endif
67
installISR(void (* isr)(void *),void * arg)68 void RPR220::installISR(void (*isr)(void *), void *arg)
69 {
70 if (m_isrInstalled)
71 uninstallISR();
72
73 // install our interrupt handler
74 mraa_gpio_isr(m_gpio, MRAA_GPIO_EDGE_RISING,
75 isr, arg);
76 m_isrInstalled = true;
77 }
78
uninstallISR()79 void RPR220::uninstallISR()
80 {
81 mraa_gpio_isr_exit(m_gpio);
82 m_isrInstalled = false;
83 }
84
85