Create main.py

For use with Clockwork Goggles guide

GemmaM0_Clockwork_Goggles/main.py

@@ -0,0 +1,58 @@
+# CircuitPython Gemma Gear goggles
+# uses two 16 NeoPixel rings (RGBW)
+# connected to Gemma M0 powered by LiPo battery
+
+import board
+import neopixel
+import time
+
+pixpinLeft = board.D1 #Data In attached to Gemma pin D1
+pixpinRight = board.D0 #Data In attached to Gemma pin D0
+numpix = 16
+
+stripLeft = neopixel.NeoPixel(pixpinLeft, numpix, bpp=4, brightness=.18,
+    auto_write=False)
+stripRight = neopixel.NeoPixel(pixpinRight, numpix, bpp=4, brightness=.18,
+    auto_write=False)
+
+def cog(pos):
+    # Input a value 0 to 255 to get a color value.
+    # Note: switch the commented lines below if using RGB vs. RGBW NeoPixles
+    if (pos < 8) or (pos > 250):
+        return (120, 0, 0, 0) #first color, red: for RGBW NeoPixels
+        #return (120, 0, 0) #first color, red: for RGB NeoPixels
+    if (pos < 85):
+        #return (int(pos * 3), int(255 - (pos*3)), 0, 0)
+        return (125, 35, 0, 0) #second color, brass: for RGBW NeoPixels
+        #return (125, 35, 0) #second color, brass: for RGB NeoPixels
+    elif (pos < 170):
+        pos -= 85
+        return (int(255 - pos*3), 0, int(pos*3), 0)#: for RGBW NeoPixels
+        #return (int(255 - pos*3), 0, int(pos*3))#: for RGB NeoPixels
+    else:
+        pos -= 170
+        return (0, int(pos*3), int(255 - pos*3), 0)#: for RGBW NeoPixels
+        #return (0, int(pos*3), int(255 - pos*3))#: for RGB NeoPixels
+
+def brass_cycle(wait, patternL, patternR):
+    # patterns do different things, try:
+    # 1 blink
+    # 24 chase w pause
+    # 64 chase
+    # 96 parial chase
+    # 128 half turn
+    # 230 quarter turn w blink
+    # 256 quarter turn
+    for j in range(255):
+        for i in range(len(stripLeft)):
+            idxL = int ((i * patternL / len(stripLeft)) + j)
+            stripLeft[i] = cog(idxL & 64) #sets the second (brass) color
+            idxR = int ((i * patternR / len(stripRight)) + j)
+            stripRight[i] = cog(idxR & 64) #sets the second (brass) color
+        stripLeft.show()
+        stripRight.show()
+        time.sleep(wait)
+
+while True:
+    brass_cycle(0.01, 256, 24)     # brass color cycle with 1ms delay per step
+                                    # patternL, patternR