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adafruit / Adafruit_CircuitPython_NeoPixel

CircuitPython drivers for neopixels.
MIT License
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Allow NEOPIXEL_POWER* init outside of NeoPixel lib #116

Closed anecdata closed 3 years ago

anecdata commented 3 years ago

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

Based on comments starting here: https://github.com/adafruit/Adafruit_CircuitPython_NeoPixel/pull/111#issuecomment-896489059

Tested on Adafruit CircuitPython 7.0.0-alpha.5-187-g1e53cf40a on 2021-08-11; Adafruit MagTag with ESP32S2

import board, digitalio, neopixel

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

status_light = neopixel.NeoPixel(board.NEOPIXEL, 4, brightness=0.05, pixel_order=neopixel.GRB)

status_light[1] = (255, 0, 255)
aux_power_io.value = True  # turn OFF NeoPixel power
status_light[2] = (0, 255, 0)  # no change after this statement (as expected)

# an interesting quirk:
aux_power_io.value = False  # no change after this statement
status_light[1] = (255, 0, 255)  # both NeoPixels turn on after this statement
# individual NeoPixel status is retained when power is disabled,
# but when power is re-enabled, it takes a new write to display all
UnexpectedMaker commented 3 years ago

Oh wicked @anecdata - thanks for doing this. I hadn't had time to get to it yet, so it's much appreciated!

UnexpectedMaker commented 3 years ago

@tannewt this change doesn't seem to be included in the neo pixel in frozen modules? How do we make this happen? Thanks!

tannewt commented 3 years ago

Updated in https://github.com/adafruit/circuitpython/pull/5288