Tpm2 Firmware for Arduino to build an Ambilight for VDR/XBMC. It has been tested with WS2801/WS2811/WS2812B LED stripes and Arduino Duemilanove with FTDI onBoard.
protohreads library installed in the Arduino libraries directory (http://dunkels.com/adam/pt/download.html) FastLED library installed in the Arduino libraries directory (https://github.com/FastLED/FastLED)
For VDR use the seduatmo-Plugin and set the mode to tpm2.
To get boblight running well, apply boblight.patch with patch -p0 <boblight.patch in boblight-source directory and setup your boblight.conf.
[device]
name ambilight
output /dev/ttyUSB0
channels 768
type momo
interval 20000
rate 500000
prefix C9 DA 03 00
postfix 36
debug off
03 00 in prefix means 768 channels. With 642 channels this value would be 02 82.
You can use an online HEX Converter to find out the value: http://www.binaryhexconverter.com/decimal-to-hex-converter