1 /*
2 * Author: Sarah Knepper <sarah.knepper@intel.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 <string>
26 #include <stdexcept>
27
28 #include "ttp223.h"
29
30 using namespace upm;
31
TTP223(unsigned int pin)32 TTP223::TTP223(unsigned int pin) {
33 // initialize gpio input
34 if ( !(m_gpio = mraa_gpio_init(pin)) )
35 {
36 throw std::invalid_argument(std::string(__FUNCTION__) +
37 ": mraa_gpio_init() failed, invalid pin?");
38 return;
39 }
40 mraa_gpio_dir(m_gpio, MRAA_GPIO_IN);
41 m_name = "ttp223";
42 m_isrInstalled = false;
43 }
44
~TTP223()45 TTP223::~TTP223() {
46 // close gpio input
47 mraa_gpio_close(m_gpio);
48 }
49
name()50 std::string TTP223::name() {
51 return m_name;
52 }
53
value()54 int TTP223::value() {
55 return mraa_gpio_read(m_gpio);
56 }
57
isPressed()58 bool TTP223::isPressed() {
59 return this->value() == 1;
60 }
61
62 #ifdef JAVACALLBACK
installISR(mraa::Edge level,IsrCallback * cb)63 void TTP223::installISR(mraa::Edge level, IsrCallback *cb)
64 {
65 installISR(level, generic_callback_isr, cb);
66 }
67 #endif
68
installISR(mraa::Edge level,void (* isr)(void *),void * arg)69 void TTP223::installISR(mraa::Edge level, void (*isr)(void *), void *arg)
70 {
71 if (m_isrInstalled)
72 uninstallISR();
73
74 // install our interrupt handler
75 mraa_gpio_isr(m_gpio, (mraa_gpio_edge_t) level, isr, arg);
76 m_isrInstalled = true;
77 }
78
uninstallISR()79 void TTP223::uninstallISR()
80 {
81 mraa_gpio_isr_exit(m_gpio);
82 m_isrInstalled = false;
83 }
84