46
void Button::set_press_mode( bool send_interim )
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// if the button is down and we're switching from sending interim presses
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// to not sending interim presses, we need to ignore the next unpress, or
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// this button press may trigger events while being presses *and* events
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// when it is unpressed.
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if( _state && _send_interim && !send_interim )
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_ignore_next_unpress = true;
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_send_interim = send_interim;
46
60
void Button::update()
49
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unsigned long millis = ::millis();
53
bool real_state = digitalRead( _pin )? false : true;
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// if real state has changed, reset the timer
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if( real_state != _last_real_state ) {
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_last_real_state = real_state;
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_millis_real_state = millis;
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// get state and check for change
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bool state = digitalRead( _pin )? false : true;
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// if we're not sending interim presses, we care about when the button
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if( !_send_interim && !state )
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// are we being told to ignore the next unpress?
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if( _ignore_next_unpress )
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_ignore_next_unpress = false;
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// check through events to see if the button was pressed long
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// enough to trigger one
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for( int a = 0; _event_times[ a ]; a++ )
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// if this event is in the future, we can stop looking
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if( _state_millis < (unsigned long)_event_times[ a ] )
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_pending_event = a + 1;
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_state_millis = millis;
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_state_duration_done = 0;
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// work out current state; if the real state timer has elapsed, set our
62
// state to real state
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if( _last_real_state != state && millis - _millis_real_state > 15 )
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state = _last_real_state;
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// if the button is pressed
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// if we are sending interim presses, we care about all the time that the
99
// button is being pressed
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if( _send_interim && state )
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// if it has just been pressed, record the time now and reset how much
71
// of the press we have already generated events for
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_millis_state = millis;
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// calculate time that has elapsed in total this press
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unsigned long elapsed = millis - _millis_state;
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// look through the events to see if any need to be triggered
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// calculate new duration for this state
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unsigned long duration = millis - _state_millis;
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// check through events to see if the button has been pressed long
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// enough to trigger one
81
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for( int a = 0; _event_times[ a ]; a++ )
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// if this event is in the future, stop
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if( (unsigned)_event_times[ a ] > elapsed ) break;
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// if this event has already been triggered, skip
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if( (unsigned)_event_times[ a ] <= _millis_done ) continue;
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_pending_event = a + 1;
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// if this event is in the future, we can stop looking
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if( duration < (unsigned long)_event_times[ a ] )
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// if this event happened since the previous update, trigger it
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if( _state_duration_done < (unsigned long)_event_times[ a ] )
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_pending_event = a + 1;
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// update the amount of press we have processed
94
_millis_done = elapsed;
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// update the duration we've accounted for
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_state_duration_done = duration;