added pixel_order

Author: caternuson

neopixel.py

@@ -36,6 +36,20 @@
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_NeoPixel.git"
 
+# Pixel color order constants
+RGB = 0
+GRB = 1
+RGBW = 2
+GRBW = 3
+
+# Pixel color order
+PIXEL_ORDER = {
+    RGB:  (0, 1, 2),
+    GRB:  (1, 0, 2),
+    RGBW: (0, 1, 2, 3),
+    GRBW: (1, 0, 2, 3),
+}
+
 class NeoPixel:
     """
     A sequence of neopixels.
@@ -76,12 +90,18 @@ class NeoPixel:
             pixels[::2] = [RED] * (len(pixels) // 2)
             time.sleep(2)
     """
-    ORDER = (1, 0, 2, 3)
-    def __init__(self, pin, n, *, bpp=3, brightness=1.0, auto_write=True):
+    #ORDER = (1, 0, 2, 3)
+    def __init__(self, pin, n, *, bpp=3, brightness=1.0, auto_write=True, pixel_order=None):
         self.pin = digitalio.DigitalInOut(pin)
         self.pin.direction = digitalio.Direction.OUTPUT
         self.n = n
-        self.bpp = bpp
+        #self.bpp = bpp
+        if pixel_order is None:
+            self.ORDER = PIXEL_ORDER[GRBW]
+            self.bpp = bpp
+        else:
+            self.ORDER = PIXEL_ORDER[pixel_order]
+            self.bpp = len(self.ORDER)
         self.buf = bytearray(n * bpp)
         # Set auto_write to False temporarily so brightness setter does _not_
         # call show() while in __init__.