25326
Dependencies: QEI WS2812 PixelArray DFPlayerMini MODSERIAL PCA9685_ pca9685
DebounceIn.h@9:4bc77e4c090e, 2019-08-23 (annotated)
- Committer:
- turumputum
- Date:
- Fri Aug 23 16:58:47 2019 +0000
- Revision:
- 9:4bc77e4c090e
- Parent:
- 0:474fb16588bf
123
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
dimavb | 0:474fb16588bf | 1 | /* |
dimavb | 0:474fb16588bf | 2 | Copyright (c) 2010 Andy Kirkham |
dimavb | 0:474fb16588bf | 3 | |
dimavb | 0:474fb16588bf | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
dimavb | 0:474fb16588bf | 5 | of this software and associated documentation files (the "Software"), to deal |
dimavb | 0:474fb16588bf | 6 | in the Software without restriction, including without limitation the rights |
dimavb | 0:474fb16588bf | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
dimavb | 0:474fb16588bf | 8 | copies of the Software, and to permit persons to whom the Software is |
dimavb | 0:474fb16588bf | 9 | furnished to do so, subject to the following conditions: |
dimavb | 0:474fb16588bf | 10 | |
dimavb | 0:474fb16588bf | 11 | The above copyright notice and this permission notice shall be included in |
dimavb | 0:474fb16588bf | 12 | all copies or substantial portions of the Software. |
dimavb | 0:474fb16588bf | 13 | |
dimavb | 0:474fb16588bf | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
dimavb | 0:474fb16588bf | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
dimavb | 0:474fb16588bf | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
dimavb | 0:474fb16588bf | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
dimavb | 0:474fb16588bf | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
dimavb | 0:474fb16588bf | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
dimavb | 0:474fb16588bf | 20 | THE SOFTWARE. |
dimavb | 0:474fb16588bf | 21 | */ |
dimavb | 0:474fb16588bf | 22 | |
dimavb | 0:474fb16588bf | 23 | #ifndef DEBOUNCEIN_H |
dimavb | 0:474fb16588bf | 24 | #define DEBOUNCEIN_H |
dimavb | 0:474fb16588bf | 25 | |
dimavb | 0:474fb16588bf | 26 | #include "mbed.h" |
dimavb | 0:474fb16588bf | 27 | |
dimavb | 0:474fb16588bf | 28 | /** DebounceIn adds mechanical switch debouncing to DigitialIn. |
dimavb | 0:474fb16588bf | 29 | * |
dimavb | 0:474fb16588bf | 30 | * Example: |
dimavb | 0:474fb16588bf | 31 | * @code |
dimavb | 0:474fb16588bf | 32 | * #include "mbed.h" |
dimavb | 0:474fb16588bf | 33 | * #include "DebounceIn.h" |
dimavb | 0:474fb16588bf | 34 | * |
dimavb | 0:474fb16588bf | 35 | * DebounceIn d(p5); |
dimavb | 0:474fb16588bf | 36 | * DigitialOut led1(LED1); |
dimavb | 0:474fb16588bf | 37 | * DigitialOut led2(LED2); |
dimavb | 0:474fb16588bf | 38 | * |
dimavb | 0:474fb16588bf | 39 | * int main() { |
dimavb | 0:474fb16588bf | 40 | * while(1) { |
dimavb | 0:474fb16588bf | 41 | * led1 = d; |
dimavb | 0:474fb16588bf | 42 | * led2 = d.read(); |
dimavb | 0:474fb16588bf | 43 | * } |
dimavb | 0:474fb16588bf | 44 | * } |
dimavb | 0:474fb16588bf | 45 | * @endcode |
dimavb | 0:474fb16588bf | 46 | * |
dimavb | 0:474fb16588bf | 47 | * @see set_debounce_us() To change the sampling frequency. |
dimavb | 0:474fb16588bf | 48 | * @see set_samples() To alter the number of samples. |
dimavb | 0:474fb16588bf | 49 | * |
dimavb | 0:474fb16588bf | 50 | * Users of this library may also be interested in PinDetect library:- |
dimavb | 0:474fb16588bf | 51 | * @see http://mbed.org/users/AjK/libraries/PinDetect/latest |
dimavb | 0:474fb16588bf | 52 | * |
dimavb | 0:474fb16588bf | 53 | * This example shows one input displayed by two outputs. The input |
dimavb | 0:474fb16588bf | 54 | * is debounced by the default 10ms. |
dimavb | 0:474fb16588bf | 55 | */ |
dimavb | 0:474fb16588bf | 56 | |
dimavb | 0:474fb16588bf | 57 | class DebounceIn : public DigitalIn { |
dimavb | 0:474fb16588bf | 58 | public: |
dimavb | 0:474fb16588bf | 59 | |
dimavb | 0:474fb16588bf | 60 | /** set_debounce_us |
dimavb | 0:474fb16588bf | 61 | * |
dimavb | 0:474fb16588bf | 62 | * Sets the debounce sample period time in microseconds, default is 1000 (1ms) |
dimavb | 0:474fb16588bf | 63 | * |
dimavb | 0:474fb16588bf | 64 | * @param int i The debounce sample period time to set. |
dimavb | 0:474fb16588bf | 65 | */ |
dimavb | 0:474fb16588bf | 66 | void set_debounce_us(int i) |
dimavb | 0:474fb16588bf | 67 | { |
dimavb | 0:474fb16588bf | 68 | _ticker.attach_us(this, &DebounceIn::_callback, i); |
dimavb | 0:474fb16588bf | 69 | //ticker.attach(callback(this, &Sonar::background_read), 0.01f) |
dimavb | 0:474fb16588bf | 70 | } |
dimavb | 0:474fb16588bf | 71 | |
dimavb | 0:474fb16588bf | 72 | /** set_samples |
dimavb | 0:474fb16588bf | 73 | * |
dimavb | 0:474fb16588bf | 74 | * Defines the number of samples before switching the shadow |
dimavb | 0:474fb16588bf | 75 | * definition of the pin. |
dimavb | 0:474fb16588bf | 76 | * |
dimavb | 0:474fb16588bf | 77 | * @param int i The number of samples. |
dimavb | 0:474fb16588bf | 78 | */ |
dimavb | 0:474fb16588bf | 79 | void set_samples(int i) { _samples = i; } |
dimavb | 0:474fb16588bf | 80 | |
dimavb | 0:474fb16588bf | 81 | /** read |
dimavb | 0:474fb16588bf | 82 | * |
dimavb | 0:474fb16588bf | 83 | * Read the value of the debounced pin. |
dimavb | 0:474fb16588bf | 84 | */ |
dimavb | 0:474fb16588bf | 85 | int read(void) { return _shadow; } |
dimavb | 0:474fb16588bf | 86 | int trig(void) { _trig2 = _trig; _trig = 0; return _trig2; } |
dimavb | 0:474fb16588bf | 87 | int ntrig(void) { _ntrig2 = _ntrig; _ntrig = 0; return _ntrig2; } |
dimavb | 0:474fb16588bf | 88 | |
dimavb | 0:474fb16588bf | 89 | #ifdef MBED_OPERATORS |
dimavb | 0:474fb16588bf | 90 | /** operator int() |
dimavb | 0:474fb16588bf | 91 | * |
dimavb | 0:474fb16588bf | 92 | * Read the value of the debounced pin. |
dimavb | 0:474fb16588bf | 93 | */ |
dimavb | 0:474fb16588bf | 94 | operator int() { return read(); } |
dimavb | 0:474fb16588bf | 95 | #endif |
dimavb | 0:474fb16588bf | 96 | |
dimavb | 0:474fb16588bf | 97 | /** Constructor |
dimavb | 0:474fb16588bf | 98 | * |
dimavb | 0:474fb16588bf | 99 | * @param PinName pin The pin to assign as an input. |
dimavb | 0:474fb16588bf | 100 | */ |
dimavb | 0:474fb16588bf | 101 | DebounceIn(PinName pin) : DigitalIn(pin,PullUp) { _counter = 0; _samples = 5; set_debounce_us(8100); }; |
dimavb | 0:474fb16588bf | 102 | |
dimavb | 0:474fb16588bf | 103 | protected: |
dimavb | 0:474fb16588bf | 104 | void _callback(void) { |
dimavb | 0:474fb16588bf | 105 | if (DigitalIn::read()) { |
dimavb | 0:474fb16588bf | 106 | if (_counter < _samples) _counter++; |
dimavb | 0:474fb16588bf | 107 | if (_counter == _samples) |
dimavb | 0:474fb16588bf | 108 | { |
dimavb | 0:474fb16588bf | 109 | _ntrig = 0; // comment if you don`t want to miss signal |
dimavb | 0:474fb16588bf | 110 | _nlock = 0; |
dimavb | 0:474fb16588bf | 111 | _shadow = 1; |
dimavb | 0:474fb16588bf | 112 | if (!_lock) {_trig = 1; _lock = 1;} |
dimavb | 0:474fb16588bf | 113 | } |
dimavb | 0:474fb16588bf | 114 | } |
dimavb | 0:474fb16588bf | 115 | else { |
dimavb | 0:474fb16588bf | 116 | if (_counter > 0) _counter--; |
dimavb | 0:474fb16588bf | 117 | if (_counter == 0) |
dimavb | 0:474fb16588bf | 118 | { |
dimavb | 0:474fb16588bf | 119 | _shadow = 0; |
dimavb | 0:474fb16588bf | 120 | _trig = 0; // comment if you don`t want to miss signal |
dimavb | 0:474fb16588bf | 121 | _lock = 0; |
dimavb | 0:474fb16588bf | 122 | if (!_nlock) {_ntrig = 1; _nlock = 1;} |
dimavb | 0:474fb16588bf | 123 | } |
dimavb | 0:474fb16588bf | 124 | } |
dimavb | 0:474fb16588bf | 125 | } |
dimavb | 0:474fb16588bf | 126 | |
dimavb | 0:474fb16588bf | 127 | Ticker _ticker; |
dimavb | 0:474fb16588bf | 128 | int _lock; |
dimavb | 0:474fb16588bf | 129 | int _nlock; |
dimavb | 0:474fb16588bf | 130 | |
dimavb | 0:474fb16588bf | 131 | int _ntrig; |
dimavb | 0:474fb16588bf | 132 | int _ntrig2; |
dimavb | 0:474fb16588bf | 133 | |
dimavb | 0:474fb16588bf | 134 | int _trig; |
dimavb | 0:474fb16588bf | 135 | int _trig2; |
dimavb | 0:474fb16588bf | 136 | |
dimavb | 0:474fb16588bf | 137 | int _shadow; |
dimavb | 0:474fb16588bf | 138 | int _counter; |
dimavb | 0:474fb16588bf | 139 | int _samples; |
dimavb | 0:474fb16588bf | 140 | }; |
dimavb | 0:474fb16588bf | 141 | |
dimavb | 0:474fb16588bf | 142 | #endif |
dimavb | 0:474fb16588bf | 143 |