MCP23S17 Bufferd
ExioBufferedDebounceIn.h@6:cc3b65d44e9e, 2016-11-04 (annotated)
- Committer:
- ryood
- Date:
- Fri Nov 04 23:16:41 2016 +0000
- Revision:
- 6:cc3b65d44e9e
- Parent:
- 4:acd6e59f8544
Add: Test ExioBufferedPinDetect
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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ryood | 4:acd6e59f8544 | 1 | /* |
ryood | 4:acd6e59f8544 | 2 | Copyright (c) 2010 Andy Kirkham |
ryood | 4:acd6e59f8544 | 3 | |
ryood | 4:acd6e59f8544 | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
ryood | 4:acd6e59f8544 | 5 | of this software and associated documentation files (the "Software"), to deal |
ryood | 4:acd6e59f8544 | 6 | in the Software without restriction, including without limitation the rights |
ryood | 4:acd6e59f8544 | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
ryood | 4:acd6e59f8544 | 8 | copies of the Software, and to permit persons to whom the Software is |
ryood | 4:acd6e59f8544 | 9 | furnished to do so, subject to the following conditions: |
ryood | 4:acd6e59f8544 | 10 | |
ryood | 4:acd6e59f8544 | 11 | The above copyright notice and this permission notice shall be included in |
ryood | 4:acd6e59f8544 | 12 | all copies or substantial portions of the Software. |
ryood | 4:acd6e59f8544 | 13 | |
ryood | 4:acd6e59f8544 | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
ryood | 4:acd6e59f8544 | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
ryood | 4:acd6e59f8544 | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
ryood | 4:acd6e59f8544 | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
ryood | 4:acd6e59f8544 | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
ryood | 4:acd6e59f8544 | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
ryood | 4:acd6e59f8544 | 20 | THE SOFTWARE. |
ryood | 4:acd6e59f8544 | 21 | */ |
ryood | 4:acd6e59f8544 | 22 | |
ryood | 4:acd6e59f8544 | 23 | /* |
ryood | 4:acd6e59f8544 | 24 | * 2016.11.5 Customized for MCP23S17 Buffered Input by ryood |
ryood | 4:acd6e59f8544 | 25 | */ |
ryood | 4:acd6e59f8544 | 26 | |
ryood | 4:acd6e59f8544 | 27 | #ifndef EXIOBUFFEREDDEBOUNCEIN_H |
ryood | 4:acd6e59f8544 | 28 | #define EXIOBUFFEREDDEBOUNCEIN_H |
ryood | 4:acd6e59f8544 | 29 | |
ryood | 4:acd6e59f8544 | 30 | #include "mbed.h" |
ryood | 4:acd6e59f8544 | 31 | #include "ExioBufferedIn.h" |
ryood | 4:acd6e59f8544 | 32 | |
ryood | 4:acd6e59f8544 | 33 | /** DebounceIn adds mechanical switch debouncing to DigitialIn. |
ryood | 4:acd6e59f8544 | 34 | * |
ryood | 4:acd6e59f8544 | 35 | * Example: |
ryood | 4:acd6e59f8544 | 36 | * @code |
ryood | 4:acd6e59f8544 | 37 | * #include "mbed.h" |
ryood | 4:acd6e59f8544 | 38 | * #include "DebounceIn.h" |
ryood | 4:acd6e59f8544 | 39 | * |
ryood | 4:acd6e59f8544 | 40 | * DebounceIn d(p5); |
ryood | 4:acd6e59f8544 | 41 | * DigitialOut led1(LED1); |
ryood | 4:acd6e59f8544 | 42 | * DigitialOut led2(LED2); |
ryood | 4:acd6e59f8544 | 43 | * |
ryood | 4:acd6e59f8544 | 44 | * int main() { |
ryood | 4:acd6e59f8544 | 45 | * while(1) { |
ryood | 4:acd6e59f8544 | 46 | * led1 = d; |
ryood | 4:acd6e59f8544 | 47 | * led2 = d.read(); |
ryood | 4:acd6e59f8544 | 48 | * } |
ryood | 4:acd6e59f8544 | 49 | * } |
ryood | 4:acd6e59f8544 | 50 | * @endcode |
ryood | 4:acd6e59f8544 | 51 | * |
ryood | 4:acd6e59f8544 | 52 | * @see set_debounce_us() To change the sampling frequency. |
ryood | 4:acd6e59f8544 | 53 | * @see set_samples() To alter the number of samples. |
ryood | 4:acd6e59f8544 | 54 | * |
ryood | 4:acd6e59f8544 | 55 | * Users of this library may also be interested in PinDetect library:- |
ryood | 4:acd6e59f8544 | 56 | * @see http://mbed.org/users/AjK/libraries/PinDetect/latest |
ryood | 4:acd6e59f8544 | 57 | * |
ryood | 4:acd6e59f8544 | 58 | * This example shows one input displayed by two outputs. The input |
ryood | 4:acd6e59f8544 | 59 | * is debounced by the default 10ms. |
ryood | 4:acd6e59f8544 | 60 | */ |
ryood | 4:acd6e59f8544 | 61 | |
ryood | 4:acd6e59f8544 | 62 | class ExioBufferedDebounceIn : public ExioBufferedIn { |
ryood | 4:acd6e59f8544 | 63 | public: |
ryood | 4:acd6e59f8544 | 64 | |
ryood | 4:acd6e59f8544 | 65 | /** set_debounce_us |
ryood | 4:acd6e59f8544 | 66 | * |
ryood | 4:acd6e59f8544 | 67 | * Sets the debounce sample period time in microseconds, default is 1000 (1ms) |
ryood | 4:acd6e59f8544 | 68 | * |
ryood | 4:acd6e59f8544 | 69 | * @param int i The debounce sample period time to set. |
ryood | 4:acd6e59f8544 | 70 | */ |
ryood | 4:acd6e59f8544 | 71 | void set_debounce_us(int i) { _ticker.attach_us(this, &ExioBufferedDebounceIn::_callback, i); } |
ryood | 4:acd6e59f8544 | 72 | |
ryood | 4:acd6e59f8544 | 73 | /** set_samples |
ryood | 4:acd6e59f8544 | 74 | * |
ryood | 4:acd6e59f8544 | 75 | * Defines the number of samples before switching the shadow |
ryood | 4:acd6e59f8544 | 76 | * definition of the pin. |
ryood | 4:acd6e59f8544 | 77 | * |
ryood | 4:acd6e59f8544 | 78 | * @param int i The number of samples. |
ryood | 4:acd6e59f8544 | 79 | */ |
ryood | 4:acd6e59f8544 | 80 | void set_samples(int i) { _samples = i; } |
ryood | 4:acd6e59f8544 | 81 | |
ryood | 4:acd6e59f8544 | 82 | /** read |
ryood | 4:acd6e59f8544 | 83 | * |
ryood | 4:acd6e59f8544 | 84 | * Read the value of the debounced pin. |
ryood | 4:acd6e59f8544 | 85 | */ |
ryood | 4:acd6e59f8544 | 86 | int read(void) { return _shadow; } |
ryood | 4:acd6e59f8544 | 87 | |
ryood | 4:acd6e59f8544 | 88 | #ifdef MBED_OPERATORS |
ryood | 4:acd6e59f8544 | 89 | /** operator int() |
ryood | 4:acd6e59f8544 | 90 | * |
ryood | 4:acd6e59f8544 | 91 | * Read the value of the debounced pin. |
ryood | 4:acd6e59f8544 | 92 | */ |
ryood | 4:acd6e59f8544 | 93 | operator int() { return read(); } |
ryood | 4:acd6e59f8544 | 94 | #endif |
ryood | 4:acd6e59f8544 | 95 | |
ryood | 4:acd6e59f8544 | 96 | /** Constructor |
ryood | 4:acd6e59f8544 | 97 | * |
ryood | 4:acd6e59f8544 | 98 | * @param buffer The Exio Buffered object |
ryood | 4:acd6e59f8544 | 99 | * @param pin The pin number |
ryood | 4:acd6e59f8544 | 100 | */ |
ryood | 4:acd6e59f8544 | 101 | ExioBufferedDebounceIn(ExioInBuffer* buffer, int pin) : |
ryood | 4:acd6e59f8544 | 102 | ExioBufferedIn(buffer, pin) |
ryood | 4:acd6e59f8544 | 103 | { |
ryood | 4:acd6e59f8544 | 104 | _counter = 0; |
ryood | 4:acd6e59f8544 | 105 | _samples = 10; |
ryood | 4:acd6e59f8544 | 106 | // set_debounce_us(1000); |
ryood | 4:acd6e59f8544 | 107 | }; |
ryood | 4:acd6e59f8544 | 108 | |
ryood | 4:acd6e59f8544 | 109 | protected: |
ryood | 4:acd6e59f8544 | 110 | void _callback(void) { |
ryood | 4:acd6e59f8544 | 111 | if (ExioBufferedIn::read()) { |
ryood | 4:acd6e59f8544 | 112 | if (_counter < _samples) _counter++; |
ryood | 4:acd6e59f8544 | 113 | if (_counter == _samples) _shadow = 1; |
ryood | 4:acd6e59f8544 | 114 | } |
ryood | 4:acd6e59f8544 | 115 | else { |
ryood | 4:acd6e59f8544 | 116 | if (_counter > 0) _counter--; |
ryood | 4:acd6e59f8544 | 117 | if (_counter == 0) _shadow = 0; |
ryood | 4:acd6e59f8544 | 118 | } |
ryood | 4:acd6e59f8544 | 119 | } |
ryood | 4:acd6e59f8544 | 120 | |
ryood | 4:acd6e59f8544 | 121 | Ticker _ticker; |
ryood | 4:acd6e59f8544 | 122 | int _shadow; |
ryood | 4:acd6e59f8544 | 123 | int _counter; |
ryood | 4:acd6e59f8544 | 124 | int _samples; |
ryood | 4:acd6e59f8544 | 125 | }; |
ryood | 4:acd6e59f8544 | 126 | |
ryood | 4:acd6e59f8544 | 127 | #endif //EXIOBUFFEREDDEBOUNCEIN_H |
ryood | 4:acd6e59f8544 | 128 |