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