Update to the latest version from upstream which adds RGBW support and lays the foundation for pixel ordering.

Author: tannewt

neopixel.py

@@ -5,10 +5,12 @@
 from neopixel_write import neopixel_write
 
 class NeoPixel:
-    def __init__(self, pin, n):
+    ORDER = (1, 0, 2, 3)
+    def __init__(self, pin, n, bpp=3):
         self.pin = nativeio.DigitalInOut(pin)
         self.n = n
-        self.buf = bytearray(n * 3)
+        self.bpp = bpp
+        self.buf = bytearray(n * bpp)
         self.pin.switch_to_output()
 
     def __enter__(self):
@@ -18,21 +20,18 @@ def __exit__(self, exception_type, exception_value, traceback):
         self.pin.deinit()
 
     def __setitem__(self, index, val):
-        r, g, b = val
-        self.buf[index * 3] = g
-        self.buf[index * 3 + 1] = r
-        self.buf[index * 3 + 2] = b
+        offset = index * self.bpp
+        for i in range(self.bpp):
+            self.buf[offset + self.ORDER[i]] = val[i]
 
     def __getitem__(self, index):
-        i = index * 3
-        return self.buf[i + 1], self.buf[i], self.buf[i + 2]
+        offset = index * self.bpp
+        return tuple(self.buf[offset + self.ORDER[i]]
+                     for i in range(self.bpp))
 
     def fill(self, color):
-        r, g, b = color
-        for i in range(len(self.buf) / 3):
-            self.buf[i * 3] = g
-            self.buf[i * 3 + 1] = r
-            self.buf[i * 3 + 2] = b
+        for i in range(self.n):
+            self[i] = color
 
     def write(self):
         neopixel_write(self.pin, self.buf, True)