Big update here:
http://thegreatgeekery.blogspot.ca/2012/10/pixelpi-update.html
Update (August 19th):
- Pixel Invaders support provided in the 1.3.0-Beta4 release of pixel controller (Here: https://github.com/neophob/PixelController/downloads)
- Tested and working with the latest checked in version of PixelPi
- Run it like this: " sudo python pixelpi.py --chip WS2801 --mode all_off "
- It works by sending the pixel data to the pixelPi software using a UDP network connection. So in pixelcontroller you must setup a UDP output device with the IP set to the IP address of your Raspberry Pi board (Keep the port set at 6803)
- The PixelPi software receives the packet and sets the pixels accordingly.
Update (august 17th):
- Just added preliminary support for pixel invaders; Neophob (from http://www.pixelinvaders.ch) just added UDP support so the pixelcontroller software can talk to the Raspberry Pi (https://github.com/neophob/PixelController/issues/23) Its still a work in progress but should be functional(ish)
What it does so far:
- Supports POV LED Strip (Like the original Adafruit Software)
- Now Support matrix displays (2D Panels)
- Added some test modes (fade and chase modes)
- Supports pixel remapping (by using a CSV file with the location of your pixels in the array)
- Adjustable refresh rate / chase rate
- All options selectable by command line args (no python tweaking required (hopefully))
What's up next.
- panning on large images across the pixel array. Ideally I was thinking it would be cool to pass in some images from vgamaps.com and have it pan around them.
- animation support (maybe animated GIF)
- TCP/IP support (support sending display data from another PC)
Installation:
Grab the python file:
git clone git://github.com/scottjgibson/PixelPi.git
Install Python Image library:
sudo aptitude install python-imaging-tk
UsageL
pi@raspberrypi ~/git/PixelPi $ sudo python pixelpi.py --help
usage: pixelpi.py [-h] [-v] [--chip {WS2801,LDP8806}] --filename FILENAME
--mode {strip,array,fade,chase} [--verbose]
[--array_width ARRAY_WIDTH] [--array_height ARRAY_HEIGHT]
[--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE]
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
--chip {WS2801,LDP8806}
Specify chip type LDP8806 or WS2801
--filename FILENAME Specify the image file eg: hello.png
--mode {strip,array,fade,chase}
Choose the display mode, either POV strip or 2D array,
color, chase
--verbose enable verbose mode
--array_width ARRAY_WIDTH
Set the X dimension of your pixel array (width)
--array_height ARRAY_HEIGHT
Set the Y dimension of your pixel array (height)
--spi_dev SPI_DEV_NAME
Set the SPI device descriptor
--refresh_rate REFRESH_RATE
Set the refresh rate in ms (default 500ms)
Test with a fade:
sudo python pixelpi.py --chip WS2801 --mode fade --refresh_rate 1
Test with a chase:
sudo python pixelpi.py --chip WS2801 --mode chase--refresh_rate 1
Display an image (POV mode):
sudo python pixelpi.py --chip WS2801 --mode strip --filename test.png --refresh_rate 1
Display an image (Array mode):
sudo python pixelpi.py --chip WS2801 --mode array --filename test.png --refresh_rate 1
Wire up the RGB LED string:
I did something similar to this:
http://learn.adafruit.com/light-painting-with-raspberry-pi/hardware
My starting point:
http://learn.adafruit.com/light-painting-with-raspberry-pi/software
