Merge pull request #728 from makermelissa/raspberrypi-5

[hackapet/Adafruit_Blinka.git] / src / adafruit_blinka / microcontroller / bcm283x / neopixel.py

diff --git a/src/adafruit_blinka/microcontroller/bcm283x/neopixel.py b/src/adafruit_blinka/microcontroller/bcm283x/neopixel.py
index 1753419c136608fcc3f380fc5968d4c8ce02204c..c743220d5a07affd28045dfb4baadbccb34ebf46 100644 (file)
--- a/src/adafruit_blinka/microcontroller/bcm283x/neopixel.py
+++ b/src/adafruit_blinka/microcontroller/bcm283x/neopixel.py
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
 """BCM283x NeoPixel Driver Class"""
 import time
 import atexit
@@ -16,15 +19,15 @@ LED_STRIP = None  # We manage the color order within the neopixel library
 # a 'static' object that we will use to manage our PWM DMA channel
 # we only support one LED strip per raspi
 _led_strip = None
-_buf_len = None
+_buf = None
 
 
 def neopixel_write(gpio, buf):
     """NeoPixel Writing Function"""
     global _led_strip  # we'll have one strip we init if its not at first
-    global _buf_len # we save the length of the buf, and if it changes we will cleanup and re-initalize.
+    global _buf  # we save a reference to the buf, and if it changes we will cleanup and re-init.
 
-    if _led_strip is None or _buf_len != len(buf):
+    if _led_strip is None or buf is not _buf:
         # This is safe to call since it doesn't do anything if _led_strip is None
         neopixel_cleanup()
 
@@ -33,7 +36,7 @@ def neopixel_write(gpio, buf):
         # need to be careful that you delete its memory by calling
         # delete_ws2811_t when it's not needed.
         _led_strip = ws.new_ws2811_t()
-        _buf_len = len(buf)
+        _buf = buf
 
         # Initialize all channels to off
         for channum in range(2):