New examples/ws2801_simpletest.py based on the DotStar example, tested on GEMMA M0.

Author: Kevin J Walters

examples/ws2801_simpletest.py

@@ -0,0 +1,31 @@
+### Based on https://github.com/adafruit/Adafruit_CircuitPython_DotStar/blob/master/examples/dotstar_simpletest.py
+
+import time
+import random
+import board
+import adafruit_ws2801
+
+### Example for a GEMMA M0 driving 50 12mm leds
+oclock=board.D2
+odata=board.D0
+numleds=50
+bright=1.0
+leds = adafruit_ws2801.WS2801(oclock, odata, numleds, brightness=bright, auto_write=False)
+
+######################### HELPERS ##############################
+
+# a random color 0 -> 224
+def random_color():
+    return random.randrange(0, 7) * 32
+
+######################### MAIN LOOP ##############################
+n_leds = len(leds)
+while True:
+    #fill each led with a random color
+    for idx in range(n_leds):
+        leds[idx] = (random_color(), random_color(), random_color())
+
+    # show all leds in led string
+    leds.show()
+
+    time.sleep(.25)