This is a bit of a hack for speeding up LPD8806 LED strip without using SPI. The code was originally written by Michael Noland, "Speeding up LPD8806 show() without hardware SPI" http://michaelnoland.com/speeding-up-lpd8806-show-without-hardware-spi/
To use, replace strip.show() with strip.showCompileTime<ClockPin, DataPin>(ClockPort, DataPort). ClockPin/DataPin are NOT the Arduino board pin numbers, they're the actual pin offset within the port. You can find these numbers with some Googling (eg "Arduino Leonardo pin mapping"). ClockPort and DataPort are the data registers that contain the pins; on my Flora these are both PORTD.
For my Flora with LEDs on data pin 6 and clock pin 12, this is how I show my LEDs: strip.showCompileTime<6, 7>(PORTD, PORTD)
This Library was written for the LPD8806 PWM LED driver chips, strips and pixels. But the LPD8803/LPD8809 will probably work too.
Pick some up at Adafruit Industries
Click the Downloads Tab in the Tabbar above. Or follow this link
- Uncompress the Downloaded Library
- Rename the uncompressed folder to LPD8806
- Check that the LPD8806 folder contains LPD8806.cpp and LPD8806.h
- Place the LPD8806 library folder your /libraries/ folder, if the libraries folder does not exist - create it first!
- If your libraries folder already contains an LPD8806 folder, replace it with this version
- Restart the IDE