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/** | ||
* @file OneButton.cpp | ||
* | ||
* @brief Library for detecting button clicks, doubleclicks and long press | ||
* pattern on a single button. | ||
* | ||
* @author Matthias Hertel, https://www.mathertel.de | ||
* @Copyright Copyright (c) by Matthias Hertel, https://www.mathertel.de. | ||
* Ihor Nehrutsa, Ihor.Nehrutsa@gmail.com | ||
* | ||
* This work is licensed under a BSD style license. See | ||
* http://www.mathertel.de/License.aspx | ||
* | ||
* More information on: https://www.mathertel.de/Arduino/OneButtonLibrary.aspx | ||
* | ||
* Changelog: see OneButtonTiny.h | ||
*/ | ||
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#include "OneButtonTiny.h" | ||
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// ----- Initialization and Default Values ----- | ||
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/** | ||
* Initialize the OneButton library. | ||
* @param pin The pin to be used for input from a momentary button. | ||
* @param activeLow Set to true when the input level is LOW when the button is pressed, Default is true. | ||
* @param pullupActive Activate the internal pullup when available. Default is true. | ||
*/ | ||
OneButtonTiny::OneButtonTiny(const int pin, const boolean activeLow, const bool pullupActive) { | ||
_pin = pin; | ||
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if (activeLow) { | ||
// the button connects the input pin to GND when pressed. | ||
_buttonPressed = LOW; | ||
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} else { | ||
// the button connects the input pin to VCC when pressed. | ||
_buttonPressed = HIGH; | ||
} | ||
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if (pullupActive) { | ||
// use the given pin as input and activate internal PULLUP resistor. | ||
pinMode(pin, INPUT_PULLUP); | ||
} else { | ||
// use the given pin as input | ||
pinMode(pin, INPUT); | ||
} | ||
} // OneButton | ||
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// explicitly set the number of millisec that have to pass by before a click is assumed stable. | ||
void OneButtonTiny::setDebounceMs(const unsigned int ms) { | ||
_debounce_ms = ms; | ||
} // setDebounceMs | ||
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// explicitly set the number of millisec that have to pass by before a click is detected. | ||
void OneButtonTiny::setClickMs(const unsigned int ms) { | ||
_click_ms = ms; | ||
} // setClickMs | ||
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// explicitly set the number of millisec that have to pass by before a long button press is detected. | ||
void OneButtonTiny::setPressMs(const unsigned int ms) { | ||
_press_ms = ms; | ||
} // setPressMs | ||
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// save function for click event | ||
void OneButtonTiny::attachClick(callbackFunction newFunction) { | ||
_clickFunc = newFunction; | ||
} // attachClick | ||
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// save function for doubleClick event | ||
void OneButtonTiny::attachDoubleClick(callbackFunction newFunction) { | ||
_doubleClickFunc = newFunction; | ||
} // attachDoubleClick | ||
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// save function for longPressStart event | ||
void OneButtonTiny::attachLongPressStart(callbackFunction newFunction) { | ||
_longPressStartFunc = newFunction; | ||
} // attachLongPressStart | ||
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void OneButtonTiny::reset(void) { | ||
_state = OneButtonTiny::OCS_INIT; | ||
_nClicks = 0; | ||
_startTime = 0; | ||
} | ||
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/** | ||
* @brief Debounce input pin level for use in SpecialInput. | ||
*/ | ||
int OneButtonTiny::debounce(const int value) { | ||
now = millis(); // current (relative) time in msecs. | ||
if (_lastDebouncePinLevel == value) { | ||
if (now - _lastDebounceTime >= _debounce_ms) | ||
debouncedPinLevel = value; | ||
} else { | ||
_lastDebounceTime = now; | ||
_lastDebouncePinLevel = value; | ||
} | ||
return debouncedPinLevel; | ||
}; | ||
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/** | ||
* @brief Check input of the configured pin, | ||
* debounce input pin level and then | ||
* advance the finite state machine (FSM). | ||
*/ | ||
void OneButtonTiny::tick(void) { | ||
if (_pin >= 0) { | ||
_fsm(debounce(digitalRead(_pin)) == _buttonPressed); | ||
} | ||
} // tick() | ||
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void OneButtonTiny::tick(bool activeLevel) { | ||
_fsm(debounce(activeLevel)); | ||
} | ||
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/** | ||
* @brief Advance to a new state and save the last one to come back in cas of bouncing detection. | ||
*/ | ||
void OneButtonTiny::_newState(stateMachine_t nextState) { | ||
_state = nextState; | ||
} // _newState() | ||
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/** | ||
* @brief Run the finite state machine (FSM) using the given level. | ||
*/ | ||
void OneButtonTiny::_fsm(bool activeLevel) { | ||
unsigned long waitTime = (now - _startTime); | ||
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// Implementation of the state machine | ||
switch (_state) { | ||
case OneButtonTiny::OCS_INIT: | ||
// waiting for level to become active. | ||
if (activeLevel) { | ||
_newState(OneButtonTiny::OCS_DOWN); | ||
_startTime = now; // remember starting time | ||
_nClicks = 0; | ||
} // if | ||
break; | ||
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case OneButtonTiny::OCS_DOWN: | ||
// waiting for level to become inactive. | ||
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if (!activeLevel) { | ||
_newState(OneButtonTiny::OCS_UP); | ||
_startTime = now; // remember starting time | ||
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} else if ((activeLevel) && (waitTime > _press_ms)) { | ||
if (_longPressStartFunc) _longPressStartFunc(); | ||
_newState(OneButtonTiny::OCS_PRESS); | ||
} // if | ||
break; | ||
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case OneButtonTiny::OCS_UP: | ||
// level is inactive | ||
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// count as a short button down | ||
_nClicks++; | ||
_newState(OneButtonTiny::OCS_COUNT); | ||
break; | ||
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case OneButtonTiny::OCS_COUNT: | ||
// dobounce time is over, count clicks | ||
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if (activeLevel) { | ||
// button is down again | ||
_newState(OneButtonTiny::OCS_DOWN); | ||
_startTime = now; // remember starting time | ||
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} else if ((waitTime >= _click_ms) || (_nClicks == 2)) { | ||
// now we know how many clicks have been made. | ||
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if (_nClicks == 1) { | ||
// this was 1 click only. | ||
if (_clickFunc) _clickFunc(); | ||
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} else if (_nClicks == 2) { | ||
// this was a 2 click sequence. | ||
if (_doubleClickFunc) _doubleClickFunc(); | ||
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} // if | ||
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reset(); | ||
} // if | ||
break; | ||
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case OneButtonTiny::OCS_PRESS: | ||
// waiting for pin being release after long press. | ||
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if (!activeLevel) { | ||
_newState(OneButtonTiny::OCS_PRESSEND); | ||
_startTime = now; | ||
} // if | ||
break; | ||
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case OneButtonTiny::OCS_PRESSEND: | ||
// button was released. | ||
reset(); | ||
break; | ||
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default: | ||
// unknown state detected -> reset state machine | ||
_newState(OneButtonTiny::OCS_INIT); | ||
break; | ||
} // if | ||
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} // OneButton.tick() | ||
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// end. |
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