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[232] | 1 | /*! \file Pushbutton.h
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| 2 | *
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| 3 | * See the Pushbutton class reference for more information about this library.
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| 4 | *
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| 5 | * \class Pushbutton Pushbutton.h
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| 6 | * \brief Read button presses and releases with debouncing
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| 7 | *
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| 8 | */
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| 9 |
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| 10 | #ifndef Pushbutton_h
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| 11 | #define Pushbutton_h
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| 12 |
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| 13 | #include <Arduino.h>
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| 14 |
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| 15 | #define ZUMO_BUTTON 12
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| 16 |
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| 17 | #define PULL_UP_DISABLED 0
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| 18 | #define PULL_UP_ENABLED 1
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| 19 |
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| 20 | #define DEFAULT_STATE_LOW 0
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| 21 | #define DEFAULT_STATE_HIGH 1
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| 22 |
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| 23 | class Pushbutton
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| 24 | {
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| 25 | public:
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| 26 |
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| 27 | // constructor; takes arguments specifying whether to enable internal pull-up
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| 28 | // and the default state of the pin that the button is connected to
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| 29 | Pushbutton(unsigned char pin, unsigned char pullUp = PULL_UP_ENABLED, unsigned char defaultState = DEFAULT_STATE_HIGH);
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| 30 |
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| 31 | // wait for button to be pressed, released, or pressed and released
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| 32 | void waitForPress();
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| 33 | void waitForRelease();
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| 34 | void waitForButton();
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| 35 |
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| 36 | // indicates whether button is currently pressed
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| 37 | boolean isPressed();
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| 38 |
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| 39 | // more complex functions that return true once for each button transition
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| 40 | // from released to pressed or pressed to released
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| 41 | boolean getSingleDebouncedPress();
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| 42 | boolean getSingleDebouncedRelease();
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| 43 |
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| 44 | void init()
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| 45 | {
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| 46 | if (!initialized)
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| 47 | {
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| 48 | initialized = true;
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| 49 | init2();
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| 50 | }
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| 51 | }
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| 52 |
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| 53 | private:
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| 54 |
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| 55 | unsigned char _pin;
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| 56 | unsigned char _pullUp;
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| 57 | unsigned char _defaultState;
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| 58 | unsigned char gsdpState;
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| 59 | unsigned char gsdrState;
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| 60 | unsigned int gsdpPrevTimeMillis;
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| 61 | unsigned int gsdrPrevTimeMillis;
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| 62 | boolean initialized;
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| 63 |
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| 64 | // initializes I/O pin for use as button input
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| 65 | void init2();
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| 66 |
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| 67 | boolean _isPressed();
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| 68 | };
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| 69 |
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| 70 | #endif
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