Switch to using adafruit_debouncer instead of failing to roll my own

colorbar-fastloop.py

@@ -3,6 +3,7 @@ import board
 import neopixel
 import adafruit_datetime as datetime
 from adafruit_seesaw import seesaw, rotaryio, digitalio
+from adafruit_debouncer import Button
 import busio
 
 
@@ -23,8 +24,8 @@ i2c = busio.I2C(SCL, SDA)
 seesaw = seesaw.Seesaw(i2c, 0x36)
 
 seesaw.pin_mode(24, seesaw.INPUT_PULLUP)
-button = digitalio.DigitalIO(seesaw, 24)
-button_held = False
+pin = digitalio.DigitalIO(seesaw, 24)
+button = Button(pin)
 
 encoder = rotaryio.IncrementalEncoder(seesaw)
 last_position = -1
@@ -209,58 +210,27 @@ def countdown(
             #  displayio, but just put it on the terminal output for now)
             print("current time: " + display_time_sign + prettytime(current_time))
 
-        # If the button is currently being pressed
-        if not button.value:
+        # Update the debouncer
+        button.update()
+
+        # Pause on single short button press
+        if button.short_count == 1:
             # We are paused
             pause = True
-            # There's no long-press option before pausing, so button should
-            #  no longer be down.
-            button_held = False
             print("Timer Paused")
             # Keep looping here as long as we're paused
             while pause:
-                # If the button is being pressed
-                if not button.value and not button_held:
-                    # The button is being held down
-                    button_held = True
-                    # Record when the button started being pressed
-                    button_held_timer = time.monotonic()
-                    # Keep looping while the button is down
-                    while not button.value:
-                        # Continually check if button_hold_delay has elapsed
-                        #  while the button is still down
-                        if time.monotonic() - button_held_timer > button_hold_delay:
-                            # Button should no longer be down
-                            button_held = False
-                            # Reset the long-press timer as a debounce method
-                            button_held_timer = time.monotonic()
-                            # No longer in pause mode
+                # Update the debouncer
+                button.update()
+                # Resume timer on single short button press
+                if button.short_count == 1:
                     pause = False
-                            # Give the user feedback
-                            print("Timer Reset")
-                            # Hang around for half a second for debounce
-                            time.sleep(0.5)
-                            # Return from countdown() back to the main loop
-                            return
-                # If the button is not being pressed and button_held is True.
-                #  I don't understand why, but it gets hung up here sometimes,
-                #  requiring the user to press the button multiple times to
-                #  resume the timer again...
-                if button.value and button_held:
-                    # Flip it back to False
-                    button_held = False
-                # If the button is being short-pressed when it previously wasn't
-                #  being pressed, and we are paused.
-                if not button.value and not button_held and pause:
-                    # Flip it back to False
-                    button_held = False
-                    # Exiting pause
-                    pause = False
-                    # User Feedback
                     print("Timer Resumed")
-                    # Hang around for half a second for debounce
-                    time.sleep(0.5)
-
+                # Reset timer on long press
+                if button.long_press:
+                    pause = False
+                    print("Timer Reset")
+                    return
 
 # Hard-coded initial value. (will replace with stored value later)
 set_time_orig = 120
@@ -270,13 +240,13 @@ set_time = set_time_orig
 #  for every encoder click
 set_time_step = 60
 
-# How long is a long-press in seconds
-button_hold_delay = 2
-
 
 # Main loop
 while True:
 
+    # Update the debouncer
+    button.update()
+
     # Negate the position to make clockwise rotation positive
     position = -encoder.position
 
@@ -297,31 +267,17 @@ while True:
         last_position = position
         # User feedback
         print("Current set time: " + prettytime(set_time))
-    # If the button is being pressed, and button_held is False
-    if not button.value and not button_held:
-        # Button is being pressed
-        button_held = True
-        # Capture the current monotonic clock time to later detect a long-press
-        button_held_timer = time.monotonic()
-        # Keep looping while the button is down
-        while not button.value:
-            # Continually check if button_hold_delay has elapsed
-            #  while the button is still down
-            if time.monotonic() - button_held_timer > button_hold_delay:
+
+    # Reset timer to config value on long press
+    if button.long_press:
         # Reset the set_time to the value of set_time_orig
         #  (eventually, set_time_orig will be read from persistent config)
         set_time = set_time_orig
         # Give the user feedback
         print("Time reset to: " + prettytime(set_time))
-                # Button should no longer be down
-                button_held = False
-                # Reset the long-press timer as a debounce method
-                button_held_timer = time.monotonic()
 
-    # If the button is not being pressed, and it previously was being pressed
-    if button.value and button_held:
-        # Button is no longer being pressed
-        button_held = False
+    # Start the timer on single short press
+    if button.short_count == 1:
         # Start the countdown using the configured set_time
         countdown(set_time)
         # Once the timer has been reset, re-init last_position.