|
1 | | -/* |
2 | | -(C) 2015 dingus.dk J.Ø.N. |
3 | | -
|
4 | | -This file is part of ArduinoIHC. |
5 | | -
|
6 | | -ArduinoIHC is free software: you can redistribute it and/or modify |
7 | | -it under the terms of the GNU General Public License as published by |
8 | | -the Free Software Foundation, either version 3 of the License, or |
9 | | -(at your option) any later version. |
10 | | -
|
11 | | -ArduinoIHC is distributed in the hope that it will be useful, |
12 | | -but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | | -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | | -GNU General Public License for more details. |
15 | | -
|
16 | | -You should have received a copy of the GNU General Public License |
17 | | -along with ArduinoIHC. If not, see <http://www.gnu.org/licenses/>. |
18 | | -*/ |
19 | | -#define IHC_USEPINCHANGEINT |
20 | | -#include <Arduino.h> |
21 | | -#ifndef ESP8266 |
22 | | - #ifdef IHC_USEPINCHANGEINT |
23 | | - #include <PinChangeInt.h> |
24 | | - #else |
25 | | - #include <pcint.h> |
26 | | - #endif |
27 | | -#endif |
28 | | -#include "IHCInput.h" |
29 | | - |
30 | | -#define STARTPULSELENGTH 2500 |
31 | | -#define MAXPULSELENGTH 400 |
32 | | -#define THRESSHOLDPULSELENGTH 236 |
33 | | - |
34 | | -IHCinput* IHCinput::pTheFirst = NULL; |
35 | | - |
36 | | - |
37 | | -IHCinput::IHCinput() { |
38 | | - |
39 | | - dataline = 0; |
40 | | -#ifndef IHCINPUT_NO_MULTIPORTSUPPORT |
41 | | - pNext = NULL; |
42 | | -#endif |
43 | | -} |
44 | | - |
45 | | - |
46 | | -void IHCinput::Begin( int pin) { |
47 | | - |
48 | | - // We can only call begin one time, and we can only have one object |
49 | | - if (dataline != 0) return; |
50 | | - |
51 | | -#ifndef IHCINPUT_NO_MULTIPORTSUPPORT |
52 | | - pNext = pTheFirst; |
53 | | -#endif |
54 | | - pTheFirst = this; |
55 | | - |
56 | | - this->pin = pin; |
57 | | - pinMode(pin, INPUT); |
58 | | - // -1 when searching for start pulse |
59 | | - dataline = -1; |
60 | | - changemask = 0; |
61 | | - input = 0; |
62 | | - startpulse = micros(); |
63 | | - // Any state change will trigger the interrupt. |
64 | | -#ifdef ESP8266 |
65 | | - attachInterrupt(digitalPinToInterrupt(pin), _PinChangeInterrupt, CHANGE); |
66 | | -#else |
67 | | - #ifdef IHC_USEPINCHANGEINT |
68 | | - attachPinChangeInterrupt( pin, _PinChangeInterrupt, CHANGE); |
69 | | - #else |
70 | | - PCattachInterrupt(pin, _PinChangeInterrupt, CHANGE); |
71 | | - #endif |
72 | | -#endif |
73 | | -} |
74 | | - |
75 | | - |
76 | | -#ifdef ESP8266 |
77 | | -void ICACHE_RAM_ATTR IHCinput::_PinChangeInterrupt() { |
78 | | -#else |
79 | | -void IHCinput::_PinChangeInterrupt() { |
80 | | -#endif |
81 | | - |
82 | | - IHCinput* pInput = pTheFirst; |
83 | | -#ifdef ESP8266 |
84 | | - pInput->PinChangeInterrupt(digitalRead(pInput->pin)); |
85 | | -#else |
86 | | - #ifndef IHCINPUT_NO_MULTIPORTSUPPORT |
87 | | - byte intpin = PCintPort::arduinoPin; |
88 | | - while (pInput->pin != intpin) { |
89 | | - pInput = pInput->pNext; |
90 | | - if (pInput == NULL) return; |
91 | | - } |
92 | | - #endif |
93 | | - #ifdef IHC_USEPINCHANGEINT |
94 | | - pInput->PinChangeInterrupt(PCintPort::pinState); |
95 | | - #else |
96 | | - pInput->PinChangeInterrupt( digitalRead( pInput->pin)); |
97 | | - #endif |
98 | | -#endif |
99 | | -} |
100 | | - |
101 | | -void IHCinput::PinChangeInterrupt(byte pinstate) { |
102 | | - |
103 | | - unsigned long time = micros(); |
104 | | - if (pinstate) { |
105 | | - startpulse = time; |
106 | | - } |
107 | | - else { |
108 | | - // pulse length |
109 | | - unsigned long l = time - startpulse; |
110 | | - // Start pulse ? |
111 | | - if (dataline < 0) { |
112 | | - if (l > STARTPULSELENGTH) { |
113 | | - // We have a start |
114 | | - dataline = 0; |
115 | | - newinput = 0; |
116 | | - parity = 0; |
117 | | - } |
118 | | - } |
119 | | - else { |
120 | | - if (l > MAXPULSELENGTH) { |
121 | | - // if the pulse is more than 300 it is an error - wait for new start pulse |
122 | | - dataline = -1; |
123 | | - return; |
124 | | - } |
125 | | - if (dataline >= 8) { |
126 | | - // We ignore bit 8-15 |
127 | | - if (dataline == 16) { |
128 | | - // bit 16 is parity |
129 | | - // done - now search for start pulse again |
130 | | - dataline = -1; |
131 | | - // parity error ? |
132 | | - if ((l > THRESSHOLDPULSELENGTH) ^ (parity & 0x01)) { |
133 | | - return; |
134 | | - } |
135 | | - changemask |= input ^ newinput; |
136 | | - if (changemask) { |
137 | | - input = newinput; |
138 | | -#ifndef IHCINPUT_NO_CALLBACK |
139 | | - OnChange(changemask, input); |
140 | | -#endif |
141 | | - } |
142 | | - } |
143 | | - } |
144 | | - else if (l < THRESSHOLDPULSELENGTH) { |
145 | | - newinput |= 1 << dataline; |
146 | | - parity++; |
147 | | - } |
148 | | - dataline++; |
149 | | - } |
150 | | - } |
151 | | -} |
152 | | - |
153 | | -bool IHCinput::GetData(int channel) { |
154 | | - if (channel < 0 || channel > 7) return false; |
155 | | - return (input & (0x01 << channel)) != 0; |
156 | | -} |
157 | | - |
158 | | -byte IHCinput::GetInput() { |
159 | | - return input; |
160 | | -} |
161 | | - |
162 | | - |
163 | | -#ifndef IHCINPUT_NO_CALLBACK |
164 | | -void IHCinput::OnChange(byte changemask, byte data) { |
165 | | - |
166 | | -} |
167 | | -#endif |
168 | | - |
169 | | -byte IHCinput::GetChangeMask() { |
170 | | - |
171 | | - byte mask = changemask; |
172 | | - changemask = 0; |
173 | | - return mask; |
174 | | -} |
| 1 | +/* |
| 2 | +(C) 2015 dingus.dk J.Ø.N. |
| 3 | +
|
| 4 | +This file is part of ArduinoIHC. |
| 5 | +
|
| 6 | +ArduinoIHC is free software: you can redistribute it and/or modify |
| 7 | +it under the terms of the GNU General Public License as published by |
| 8 | +the Free Software Foundation, either version 3 of the License, or |
| 9 | +(at your option) any later version. |
| 10 | +
|
| 11 | +ArduinoIHC is distributed in the hope that it will be useful, |
| 12 | +but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | +GNU General Public License for more details. |
| 15 | +
|
| 16 | +You should have received a copy of the GNU General Public License |
| 17 | +along with ArduinoIHC. If not, see <http://www.gnu.org/licenses/>. |
| 18 | +*/ |
| 19 | +#define IHC_USEPINCHANGEINT |
| 20 | +#include <Arduino.h> |
| 21 | +#ifndef ESP8266 |
| 22 | + #ifdef IHC_USEPINCHANGEINT |
| 23 | + #include <PinChangeInt.h> |
| 24 | + #else |
| 25 | + #include <pcint.h> |
| 26 | + #endif |
| 27 | +#endif |
| 28 | +#include "IHCInput.h" |
| 29 | + |
| 30 | +#define STARTPULSELENGTH 2500 |
| 31 | +#define MAXPULSELENGTH 400 |
| 32 | +#define THRESSHOLDPULSELENGTH 236 |
| 33 | + |
| 34 | +IHCinput* IHCinput::pTheFirst = NULL; |
| 35 | + |
| 36 | + |
| 37 | +IHCinput::IHCinput() { |
| 38 | + |
| 39 | + dataline = 0; |
| 40 | +#ifndef IHCINPUT_NO_MULTIPORTSUPPORT |
| 41 | + pNext = NULL; |
| 42 | +#endif |
| 43 | +} |
| 44 | + |
| 45 | + |
| 46 | +void IHCinput::Begin( int pin) { |
| 47 | + |
| 48 | + // We can only call begin one time, and we can only have one object |
| 49 | + if (dataline != 0) return; |
| 50 | + |
| 51 | +#ifndef IHCINPUT_NO_MULTIPORTSUPPORT |
| 52 | + pNext = pTheFirst; |
| 53 | +#endif |
| 54 | + pTheFirst = this; |
| 55 | + |
| 56 | + this->pin = pin; |
| 57 | + pinMode(pin, INPUT); |
| 58 | + // -1 when searching for start pulse |
| 59 | + dataline = -1; |
| 60 | + changemask = 0; |
| 61 | + input = 0; |
| 62 | + startpulse = micros(); |
| 63 | + // Any state change will trigger the interrupt. |
| 64 | +#ifdef ESP8266 |
| 65 | + attachInterrupt(digitalPinToInterrupt(pin), _PinChangeInterrupt, CHANGE); |
| 66 | +#else |
| 67 | + #ifdef IHC_USEPINCHANGEINT |
| 68 | + attachPinChangeInterrupt( pin, _PinChangeInterrupt, CHANGE); |
| 69 | + #else |
| 70 | + PCattachInterrupt(pin, _PinChangeInterrupt, CHANGE); |
| 71 | + #endif |
| 72 | +#endif |
| 73 | +} |
| 74 | + |
| 75 | + |
| 76 | +#ifdef ESP8266 |
| 77 | +void ICACHE_RAM_ATTR IHCinput::_PinChangeInterrupt() { |
| 78 | +#else |
| 79 | +void IHCinput::_PinChangeInterrupt() { |
| 80 | +#endif |
| 81 | + |
| 82 | + IHCinput* pInput = pTheFirst; |
| 83 | +#ifdef ESP8266 |
| 84 | + pInput->PinChangeInterrupt(digitalRead(pInput->pin)); |
| 85 | +#else |
| 86 | + #ifndef IHCINPUT_NO_MULTIPORTSUPPORT |
| 87 | + byte intpin = PCintPort::arduinoPin; |
| 88 | + while (pInput->pin != intpin) { |
| 89 | + pInput = pInput->pNext; |
| 90 | + if (pInput == NULL) return; |
| 91 | + } |
| 92 | + #endif |
| 93 | + #ifdef IHC_USEPINCHANGEINT |
| 94 | + pInput->PinChangeInterrupt(PCintPort::pinState); |
| 95 | + #else |
| 96 | + pInput->PinChangeInterrupt( digitalRead( pInput->pin)); |
| 97 | + #endif |
| 98 | +#endif |
| 99 | +} |
| 100 | + |
| 101 | +void IHCinput::PinChangeInterrupt(byte pinstate) { |
| 102 | + |
| 103 | + unsigned long time = micros(); |
| 104 | + if (pinstate) { |
| 105 | + startpulse = time; |
| 106 | + } |
| 107 | + else { |
| 108 | + // pulse length |
| 109 | + unsigned long l = time - startpulse; |
| 110 | + // Start pulse ? |
| 111 | + if (dataline < 0) { |
| 112 | + if (l > STARTPULSELENGTH) { |
| 113 | + // We have a start |
| 114 | + dataline = 0; |
| 115 | + newinput = 0; |
| 116 | + parity = 0; |
| 117 | + } |
| 118 | + } |
| 119 | + else { |
| 120 | + if (l > MAXPULSELENGTH) { |
| 121 | + // if the pulse is more than 300 it is an error - wait for new start pulse |
| 122 | + dataline = -1; |
| 123 | + return; |
| 124 | + } |
| 125 | + if (dataline >= 8) { |
| 126 | + // We ignore bit 8-15 |
| 127 | + if (dataline == 16) { |
| 128 | + // bit 16 is parity |
| 129 | + // done - now search for start pulse again |
| 130 | + dataline = -1; |
| 131 | + // parity error ? |
| 132 | + if ((l > THRESSHOLDPULSELENGTH) ^ (parity & 0x01)) { |
| 133 | + return; |
| 134 | + } |
| 135 | + changemask |= input ^ newinput; |
| 136 | + if (changemask) { |
| 137 | + input = newinput; |
| 138 | +#ifndef IHCINPUT_NO_CALLBACK |
| 139 | + OnChange(changemask, input); |
| 140 | +#endif |
| 141 | + } |
| 142 | + } |
| 143 | + } |
| 144 | + else if (l < THRESSHOLDPULSELENGTH) { |
| 145 | + newinput |= 1 << dataline; |
| 146 | + parity++; |
| 147 | + } |
| 148 | + dataline++; |
| 149 | + } |
| 150 | + } |
| 151 | +} |
| 152 | + |
| 153 | +bool IHCinput::GetData(int channel) { |
| 154 | + if (channel < 0 || channel > 7) return false; |
| 155 | + return (input & (0x01 << channel)) != 0; |
| 156 | +} |
| 157 | + |
| 158 | +byte IHCinput::GetInput() { |
| 159 | + return input; |
| 160 | +} |
| 161 | + |
| 162 | + |
| 163 | +#ifndef IHCINPUT_NO_CALLBACK |
| 164 | +void IHCinput::OnChange(byte changemask, byte data) { |
| 165 | + |
| 166 | +} |
| 167 | +#endif |
| 168 | + |
| 169 | +byte IHCinput::GetChangeMask() { |
| 170 | + |
| 171 | + byte mask = changemask; |
| 172 | + changemask = 0; |
| 173 | + return mask; |
| 174 | +} |
0 commit comments