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ws2812_i2s: WS2812 leds driver implementation using i2s_dma library

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sheinz 2016-08-16 10:53:56 +03:00
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# WS2812 led driver
This driver uses I2S and DMA subsystems to drive WS2812 leds.
The idea to use I2S to control WS2812 leds belongs to [CNLohr](https://github.com/CNLohr).
## Pros
* Not using CPU to generate pulses.
* Interrupt neutral. Reliable operation even with high network load.
## Cons
* Using RAM for DMA buffer. 12 bytes per pixel.
* Can not change output PIN. Use I2S DATA output pin which is GPIO3.