j3d1/esp-open-rtos
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity
esp-open-rtos/extras/ws2812_i2s
History
lilian 9317995eb1 quick fix to prevent two ws2812_update that follow each other
2017-12-02 19:46:38 +01:00
..
component.mk ws2812_i2s: WS2812 leds driver implementation using i2s_dma library 2016-08-16 10:53:56 +03:00
README.md ws2812_i2s: WS2812 leds driver implementation using i2s_dma library 2016-08-16 10:53:56 +03:00
ws2812_i2s.c quick fix to prevent two ws2812_update that follow each other 2017-12-02 19:46:38 +01:00
ws2812_i2s.h quick fix to prevent two ws2812_update that follow each other 2017-12-02 19:46:38 +01:00

README.md

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.

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.