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bbcmicrobit / micropython

Port of MicroPython for the BBC micro:bit
https://microbit-micropython.readthedocs.io
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Neopixel protocol flags #281

Open cefn opened 8 years ago

cefn commented 8 years ago

Thanks for all the work on the micropython runtime.

I would like to port Neopixel logic already running on the Arduino-compatible Shrimp (e.g. https://twitter.com/ShrimpingIt/status/734834598039982081 running on http://start.shrimping.it/kit/alarmclock.html ) but I'm struggling to know how to switch to the different KHZ required for the different types of pixels available under the 'Neopixel' label.

Is there a facility for this in the library, or is it only WS2812 support?

Using the Adafruit library we can currently drive PL9823 with the flags... NEO_GRB + NEO_KHZ800 ...and the WS2811 modules with... NEO_RGB + NEO_KHZ400 ...as in the Word Clock.

See... https://github.com/ShrimpingIt/projects/blob/master/sketchbook/shrimpingit/alarmclock/RGBUnaryClock/RGBUnaryClock.ino ...and... https://github.com/ShrimpingIt/projects/blob/master/sketchbook/shrimpingit/alarmclock/WordClock/WordClock.ino ...for the full source.

dpgeorge commented 8 years ago

The NeoPixel driver only supports a single frequency at the moment, and GRB byte order, to control WS2812 LEDs. It's possible to improve the code to support other configurations.

cefn commented 8 years ago

If this is ever in scope, the repository at https://github.com/adafruit/Adafruit_NeoPixel could be a useful reference for the variety of configurations which could be supported.