WS2811 Led Strip SPI driver
Uses SPI bus at 3.2Mps to address 800kb/s models or 1,6Mb/s for the 400kb/s one (untested), dynamicaly creates a 1kB lookup table for fast transcoding. Datasheet available here : http://www.nooelec.com/files/WS2811.pdf
The demo uses an old Rhino GHI board, and 4 meters / 240 RGB leds from adafruit. Sorry for the quality, the leds are too bright for my Camera. Also at the end you will see the rainbow running at full speed for 5s (too fast to see) then with an extra 20ms delay before each shift for 5 more seconds.
For more details, please read the comments in the code !