Add support for MicroPython

adafruit_led_animation/__init__.py

@@ -28,13 +28,22 @@ try:
         return monotonic_ns() // NANOS_PER_MS
 
 except (ImportError, NotImplementedError):
-    import time
+    try:
+        from time import monotonic
 
         def monotonic_ms():
             """
             Implementation of monotonic_ms for platforms without time.monotonic_ns
             """
-        return int(time.monotonic() * MS_PER_SECOND)
+            return int(monotonic() * MS_PER_SECOND)
+    except (ImportError, NotImplementedError):
+        from time import time_ns
+
+        def monotonic_ms():
+            """
+            Implementation of monotonic_ms for platforms without time.monotonic_ns or time.monotonic
+            """
+            return time_ns() // NANOS_PER_MS
 
 
 NANOS_PER_MS = const(1000000)

adafruit_led_animation/animation/__init__.py

@@ -41,6 +41,7 @@ class Animation:
     # pylint: disable=too-many-arguments
     def __init__(self, pixel_object, speed, color, peers=None, paused=False, name=None):
         self.pixel_object = pixel_object
+        if hasattr(self.pixel_object, "auto_write"):
             self.pixel_object.auto_write = False
         self._peers = [self] + peers if peers is not None else [self]
         self._speed_ms = 0
@@ -116,7 +117,10 @@ class Animation:
         """
         Displays the updated pixels.  Called during animates with changes.
         """
+        if hasattr(self.pixel_object, "show"):
             self.pixel_object.show()
+        elif hasattr(self.pixel_object, "write"):
+            self.pixel_object.write()
 
     @property
     def peers(self):
@@ -154,7 +158,10 @@ class Animation:
         Fills the pixel object with a color.
         """
         self.pixel_object.fill(color)
+        if hasattr(self.pixel_object, "show"):
             self.pixel_object.show()
+        elif hasattr(self.pixel_object, "write"):
+            self.pixel_object.write()
 
     @property
     def color(self):

adafruit_led_animation/color.py

@@ -24,7 +24,28 @@ Implementation Notes
   https://circuitpython.org/downloads
 """
 # Makes colorwheel() available.
-from rainbowio import colorwheel  # pylint: disable=unused-import
+try:
+    from rainbowio import colorwheel  # pylint: disable=unused-import
+except (ImportError, ModuleNotFoundError):
+    def colorwheel(pos):
+        # ref: https://github.com/adafruit/circuitpython/blob/main/shared-module/rainbowio/__init__.c
+        pos = pos - ((pos // 256) * 256)
+        shift1 = 0
+        shift2 = 0
+        if (pos < 85):
+            shift1 = 8
+            shift2 = 16
+        elif (pos < 170):
+            pos -= 85
+            shift1 = 0
+            shift2 = 8
+        else:
+            pos -= 170
+            shift1 = 16
+            shift2 = 0
+        p = (int)(pos * 3)
+        p = p if (p < 256) else 255
+        return (p << shift1) | ((255 - p) << shift2)
 
 RED = (255, 0, 0)
 """Red."""

adafruit_led_animation/grid.py

@@ -130,7 +130,7 @@ class PixelGrid:
         else:
             raise ValueError("PixelGrid assignment needs a sub-index or x,y coordinate")
 
-        if self._pixels.auto_write:
+        if hasattr(self._pixels, "auto_write") and self._pixels.auto_write:
             self.show()
 
     def __getitem__(self, index):
@@ -150,10 +150,11 @@ class PixelGrid:
         """
         brightness from the underlying strip.
         """
-        return self._pixels.brightness
+        return self._pixels.brightness if hasattr(self._pixels, "brightness") else 1.0
 
     @brightness.setter
     def brightness(self, brightness):
+        if hasattr(self._pixels, "brightness"):
             # pylint: disable=attribute-defined-outside-init
             self._pixels.brightness = min(max(brightness, 0.0), 1.0)
 
@@ -170,17 +171,21 @@ class PixelGrid:
         """
         Shows the pixels on the underlying strip.
         """
+        if hasattr(self._pixels, "show"):
             self._pixels.show()
+        elif hasattr(self._pixels, "write"):
+            self._pixels.write()
 
     @property
     def auto_write(self):
         """
         auto_write from the underlying strip.
         """
-        return self._pixels.auto_write
+        return hasattr(self._pixels, "auto_write") and self._pixels.auto_write
 
     @auto_write.setter
     def auto_write(self, value):
+        if hasattr(self._pixels, "auto_write"):
             self._pixels.auto_write = value
 
 

adafruit_led_animation/group.py

@@ -146,7 +146,10 @@ class AnimationGroup:
                 for member in self._members:
                     if isinstance(member, Animation):
                         if last_strip != member.pixel_object:
+                            if hasattr(member.pixel_object, "show"):
                                 member.pixel_object.show()
+                            elif hasattr(member.pixel_object, "write"):
+                                member.pixel_object.write()
                             last_strip = member.pixel_object
                     else:
                         member.show()

adafruit_led_animation/helper.py

@@ -138,7 +138,7 @@ class PixelMap:
         else:
             self._set_pixels(index, val)
 
-        if self._pixels.auto_write:
+        if hasattr(self._pixels, "auto_write") and self._pixels.auto_write:
             self.show()
 
     def __getitem__(self, index):
@@ -161,10 +161,11 @@ class PixelMap:
         """
         brightness from the underlying strip.
         """
-        return self._pixels.brightness
+        return self._pixels.brightness if hasattr(self._pixels, "brightness") else 1.0
 
     @brightness.setter
     def brightness(self, brightness):
+        if hasattr(self._pixels, "brightness"):
             # pylint: disable=attribute-defined-outside-init
             self._pixels.brightness = min(max(brightness, 0.0), 1.0)
 
@@ -182,17 +183,21 @@ class PixelMap:
         """
         Shows the pixels on the underlying strip.
         """
+        if hasattr(self._pixels, "show"):
             self._pixels.show()
+        elif hasattr(self._pixels, "write"):
+            self._pixels.write()
 
     @property
     def auto_write(self):
         """
         auto_write from the underlying strip.
         """
-        return self._pixels.auto_write
+        return hasattr(self._pixels, "auto_write") and self._pixels.auto_write
 
     @auto_write.setter
     def auto_write(self, value):
+        if hasattr(self._pixels, "auto_write"):
             self._pixels.auto_write = value
 
     @classmethod