From 65eefcc2925ab3638128d9567237c91cb5145b1f Mon Sep 17 00:00:00 2001
From: anecdata <16617689+anecdata@users.noreply.github.com>
Date: Wed, 11 Aug 2021 15:11:38 -0500
Subject: [PATCH] Allow NEOPIXEL_POWER* init outside of NeoPixel lib

Ignore exception when trying to set up `NEOPIXEL_POWER`* pin, since user may have set that up already for controlling power independently of this library.

Tested on `Adafruit CircuitPython 7.0.0-alpha.5-187-g1e53cf40a on 2021-08-11; Adafruit MagTag with ESP32S2`; code snippet:
```py
import digitalio, neopixel

# NeoPixels & light sensor
aux_power_io = digitalio.DigitalInOut(board.NEOPIXEL_POWER_INVERTED)
aux_power_io.direction = Direction.OUTPUT
aux_power_io.value = False  # active low

status_light = neopixel.NeoPixel(board.NEOPIXEL, 4, brightness=0.05, pixel_order=neopixel.GRB)
```
---
 neopixel.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/neopixel.py b/neopixel.py
index 6af8d95..9b62818 100644
--- a/neopixel.py
+++ b/neopixel.py
@@ -120,8 +120,11 @@ def __init__(
             if not power:
                 power = getattr(board, "NEOPIXEL_POWER", None)
             if power:
-                self._power = digitalio.DigitalInOut(power)
-                self._power.switch_to_output(value=polarity)
+                try:
+                    self._power = digitalio.DigitalInOut(power)
+                    self._power.switch_to_output(value=polarity)
+                except ValueError:
+                    pass
 
         super().__init__(
             n, brightness=brightness, byteorder=pixel_order, auto_write=auto_write