1 /*
2 * Author: Alexander Komarov <alexander.komarov@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 #include <stdlib.h>
30 #include <functional>
31 #include <string.h>
32 #include "joystick12.h"
33
34 using namespace upm;
35
36 // FIXME AK: to make configurable if needed
37 const int Joystick12::X_left = 100;
38 const int Joystick12::X_center = 1610;
39 const int Joystick12::X_right= 4070;
40
41 const int Joystick12::Y_left = 2;
42 const int Joystick12::Y_center = 1610;
43 const int Joystick12::Y_right= 4070;
44
45
Joystick12(int pinX,int pinY)46 Joystick12::Joystick12(int pinX, int pinY) {
47
48 if ( !(m_joystickCtxX = mraa_aio_init(pinX)) )
49 {
50 throw std::invalid_argument(std::string(__FUNCTION__) +
51 ": mraa_aio_init(pinX) failed, invalid pin?");
52 return;
53 }
54
55 if ( !(m_joystickCtxY = mraa_aio_init(pinY)) )
56 {
57 throw std::invalid_argument(std::string(__FUNCTION__) +
58 ": mraa_aio_init(pinY) failed, invalid pin?");
59 return;
60 }
61 }
62
~Joystick12()63 Joystick12::~Joystick12() {
64 // close inputs
65 mraa_result_t error;
66 error = mraa_aio_close(m_joystickCtxX);
67 if (error != MRAA_SUCCESS) {
68 mraa_result_print(error);
69 }
70 error = mraa_aio_close(m_joystickCtxY);
71 if (error != MRAA_SUCCESS) {
72 mraa_result_print(error);
73 }
74 }
75
getXInput()76 float Joystick12::getXInput() {
77 float in = mraa_aio_read (m_joystickCtxX);
78 if (in < X_left) return -1;
79 if (in < X_center) return -(X_center - in) / (X_center - X_left);
80 if (in == X_center) return 0;
81 if (in < X_right) return (in - X_center) / (X_right - X_center);
82 if (in >= X_right) return 1;
83 mraa_result_print(MRAA_ERROR_UNSPECIFIED);
84 return 0;
85 }
86
getYInput()87 float Joystick12::getYInput() {
88 float in = mraa_aio_read (m_joystickCtxY);
89 if (in < Y_left) return -1;
90 if (in < Y_center) return -(Y_center - in) / (Y_center - Y_left);
91 if (in == Y_center) return 0;
92 if (in < Y_right) return (in - Y_center) / (Y_right - Y_center);
93 if (in >= Y_right) return 1;
94 mraa_result_print(MRAA_ERROR_UNSPECIFIED);
95 return 0;
96 }
97
98
99