Merge pull request #63 from rhooper/refactor-to-ms

use milliseconds instead to support smaller boards

adafruit_led_animation/__init__.py

@@ -35,15 +35,25 @@ except ImportError:
 
 try:
     from time import monotonic_ns
-except ImportError:
+
+    monotonic_ns()  # Test monotonic_ns in 6.x
+
+    def monotonic_ms():
+        """
+        Return monotonic time in milliseconds.
+        """
+        return monotonic_ns() // NANOS_PER_MS
+
+
+except (ImportError, NotImplementedError):
     import time
 
-    def monotonic_ns():
+    def monotonic_ms():
         """
-        Implementation of monotonic_ns for platforms without time.monotonic_ns
+        Implementation of monotonic_ms for platforms without time.monotonic_ns
         """
-        return int(time.time() * NANOS_PER_SECOND)
+        return int(time.monotonic() * MS_PER_SECOND)
 
 
-NANOS_PER_SECOND = const(1000000000)
 NANOS_PER_MS = const(1000000)
+MS_PER_SECOND = const(1000)

adafruit_led_animation/animation/__init__.py

@@ -46,7 +46,7 @@ Implementation Notes
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_LED_Animation.git"
 
-from adafruit_led_animation import NANOS_PER_SECOND, monotonic_ns
+from adafruit_led_animation import MS_PER_SECOND, monotonic_ms
 
 
 class Animation:
@@ -61,13 +61,13 @@ class Animation:
         self.pixel_object = pixel_object
         self.pixel_object.auto_write = False
         self._peers = [self] + peers if peers is not None else [self]
-        self._speed_ns = 0
+        self._speed_ms = 0
         self._color = None
         self._paused = paused
-        self._next_update = monotonic_ns()
+        self._next_update = monotonic_ms()
         self._time_left_at_pause = 0
         self._also_notify = []
-        self.speed = speed  # sets _speed_ns
+        self.speed = speed  # sets _speed_ms
         self.color = color  # Triggers _set_color
         self.name = name
         self.cycle_complete = False
@@ -93,7 +93,7 @@ class Animation:
         if self._paused:
             return False
 
-        now = monotonic_ns()
+        now = monotonic_ms()
         if now < self._next_update:
             return False
 
@@ -113,7 +113,7 @@ class Animation:
                 anim.cycle_complete = False
                 anim.on_cycle_complete()
 
-        self._next_update = now + self._speed_ns
+        self._next_update = now + self._speed_ms
         return True
 
     def draw(self):
@@ -157,13 +157,13 @@ class Animation:
         Stops the animation until resumed.
         """
         self._paused = True
-        self._time_left_at_pause = max(0, monotonic_ns() - self._next_update)
+        self._time_left_at_pause = max(0, monotonic_ms() - self._next_update)
 
     def resume(self):
         """
         Resumes the animation.
         """
-        self._next_update = monotonic_ns() + self._time_left_at_pause
+        self._next_update = monotonic_ms() + self._time_left_at_pause
         self._time_left_at_pause = 0
         self._paused = False
 
@@ -201,11 +201,11 @@ class Animation:
         """
         The animation speed in fractional seconds.
         """
-        return self._speed_ns / NANOS_PER_SECOND
+        return self._speed_ms / MS_PER_SECOND
 
     @speed.setter
     def speed(self, seconds):
-        self._speed_ns = int(seconds * NANOS_PER_SECOND)
+        self._speed_ms = int(seconds * MS_PER_SECOND)
 
     def on_cycle_complete(self):
         """

adafruit_led_animation/animation/rainbow.py

@@ -45,7 +45,7 @@ Implementation Notes
 
 from adafruit_led_animation.animation import Animation
 from adafruit_led_animation.color import BLACK, colorwheel
-from adafruit_led_animation import NANOS_PER_SECOND, monotonic_ns
+from adafruit_led_animation import MS_PER_SECOND, monotonic_ms
 
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_LED_Animation.git"
@@ -88,15 +88,15 @@ class Rainbow(Animation):
     on_cycle_complete_supported = True
 
     def _color_wheel_generator(self):
-        period = int(self._period * NANOS_PER_SECOND)
+        period = int(self._period * MS_PER_SECOND)
 
         num_pixels = len(self.pixel_object)
-        last_update = monotonic_ns()
+        last_update = monotonic_ms()
         cycle_position = 0
         last_pos = 0
         while True:
             cycle_completed = False
-            now = monotonic_ns()
+            now = monotonic_ms()
             time_since_last_draw = now - last_update
             last_update = now
             pos = cycle_position = (cycle_position + time_since_last_draw) % period

adafruit_led_animation/helper.py

@@ -44,7 +44,7 @@ Implementation Notes
 
 import math
 
-from . import NANOS_PER_SECOND, monotonic_ns
+from . import MS_PER_SECOND, monotonic_ms
 from .color import calculate_intensity
 
 
@@ -339,14 +339,14 @@ def pulse_generator(period: float, animation_object, dotstar_pwm=False):
     :param animation_object: An animation object to interact with.
     :param dotstar_pwm: Whether to use the dostar per pixel PWM value for brightness control.
     """
-    period = int(period * NANOS_PER_SECOND)
+    period = int(period * MS_PER_SECOND)
     half_period = period // 2
 
-    last_update = monotonic_ns()
+    last_update = monotonic_ms()
     cycle_position = 0
     last_pos = 0
     while True:
-        now = monotonic_ns()
+        now = monotonic_ms()
         time_since_last_draw = now - last_update
         last_update = now
         pos = cycle_position = (cycle_position + time_since_last_draw) % period

adafruit_led_animation/sequence.py

@@ -46,7 +46,7 @@ Implementation Notes
 
 import random
 from adafruit_led_animation.color import BLACK
-from . import NANOS_PER_SECOND, monotonic_ns
+from . import MS_PER_SECOND, monotonic_ms
 
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_LED_Animation.git"
@@ -108,9 +108,9 @@ class AnimationSequence:
             )
         self._members = members
         self._advance_interval = (
-            advance_interval * NANOS_PER_SECOND if advance_interval else None
+            advance_interval * MS_PER_SECOND if advance_interval else None
         )
-        self._last_advance = monotonic_ns()
+        self._last_advance = monotonic_ms()
         self._current = 0
         self.auto_clear = auto_clear
         self.auto_reset = auto_reset
@@ -162,7 +162,7 @@ class AnimationSequence:
     def _auto_advance(self):
         if not self._advance_interval:
             return
-        now = monotonic_ns()
+        now = monotonic_ms()
         if now - self._last_advance > self._advance_interval:
             self._last_advance = now
             self._advance()
@@ -247,7 +247,7 @@ class AnimationSequence:
         if self._paused:
             return
         self._paused = True
-        self._paused_at = monotonic_ns()
+        self._paused_at = monotonic_ms()
         self.current_animation.freeze()
 
     def resume(self):
@@ -257,7 +257,7 @@ class AnimationSequence:
         if not self._paused:
             return
         self._paused = False
-        now = monotonic_ns()
+        now = monotonic_ms()
         self._last_advance += now - self._paused_at
         self._paused_at = 0
         self.current_animation.resume()