65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
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#include "debounce.h"
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enum class ButtonEvent : uint8_t {
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NoEvent,
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Press,
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LongPress,
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DoublePress,
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};
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// template wird komplett wegoptimiert (wie #define)
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template<uint16_t LONGPRESS_TIMEOUT, uint16_t DOUBLEPRESS_TIMEOUT>
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class Button {
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public:
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enum class State : uint8_t {
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Idle,
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Pressed,
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LongPressed,
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Released,
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};
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ButtonEvent event(RawButtonEvent result) {
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switch(state) {
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case State::Idle :
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if(result == RawButtonEvent::Pressed) {
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state = State::Pressed;
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counter = millis();
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}
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break;
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case State::Pressed :
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if(result == RawButtonEvent::Released) {
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state = State::Released;
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counter = millis();
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} else if((uint16_t) millis() - counter >= LONGPRESS_TIMEOUT) {
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state = State::LongPressed;
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return ButtonEvent::LongPress;
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}
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break;
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case State::Released :
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if(result == RawButtonEvent::Pressed) {
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state= State::Idle;
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return ButtonEvent::DoublePress;
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} else if((uint16_t) millis() - counter >= DOUBLEPRESS_TIMEOUT) {
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state = State::Idle;
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return ButtonEvent::Press;
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}
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break;
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case State::LongPressed :
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if(result == RawButtonEvent::Released) {
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state = State::Idle;
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} else {
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return ButtonEvent::LongPress;
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}
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break;
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}
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return ButtonEvent::NoEvent;
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}
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private:
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State state = State::Idle;
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uint16_t counter = 0;
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};
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