diff options
Diffstat (limited to 'klippy/extras/buttons.py')
| -rw-r--r-- | klippy/extras/buttons.py | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/klippy/extras/buttons.py b/klippy/extras/buttons.py index daa998a9..4f012f51 100644 --- a/klippy/extras/buttons.py +++ b/klippy/extras/buttons.py @@ -244,6 +244,33 @@ class HalfStepRotaryEncoder(BaseRotaryEncoder): BaseRotaryEncoder.R_START | BaseRotaryEncoder.R_DIR_CCW), ) +class DebounceButton: + def __init__(self, config, button_action): + self.printer = config.get_printer() + self.reactor = self.printer.get_reactor() + self.button_action = button_action + self.debounce_delay = config.getfloat('debounce_delay', 0., minval=0.) + self.logical_state = None + self.physical_state = None + self.latest_eventtime = None + def button_handler(self, eventtime, state): + self.physical_state = state + self.latest_eventtime = eventtime + # if there would be no state transition, ignore the event: + if self.logical_state == self.physical_state: + return + trigger_time = eventtime + self.debounce_delay + self.reactor.register_callback(self._debounce_event, trigger_time) + def _debounce_event(self, eventtime): + # if there would be no state transition, ignore the event: + if self.logical_state == self.physical_state: + return + # if there were more recent events, they supersede this one: + if (eventtime - self.debounce_delay) < self.latest_eventtime: + return + # enact state transition and trigger action + self.logical_state = self.physical_state + self.button_action(self.latest_eventtime, self.logical_state) ###################################################################### # Button registration code @@ -261,6 +288,14 @@ class PrinterButtons: self.adc_buttons[pin] = adc_buttons = MCU_ADC_buttons( self.printer, pin, pullup) adc_buttons.setup_button(min_val, max_val, callback) + def register_debounce_button(self, pin, callback, config): + debounce = DebounceButton(config, callback) + return self.register_buttons([pin], debounce.button_handler) + def register_debounce_adc_button(self, pin, min_val, max_val, pullup + , callback, config): + debounce = DebounceButton(config, callback) + return self.register_adc_button(pin, min_val. min_val, max_val, pullup + , debounce.button_handler) def register_adc_button_push(self, pin, min_val, max_val, pullup, callback): def helper(eventtime, state, callback=callback): if state: |