RGB Pixel Array Driver for the Raspberry Pi
Project Page: http://thegreatgeekery.blogspot.ca/2012/08/raspberry-pi-and-ws2801.html
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Originally based on http://learn.adafruit.com/light-painting-with-raspberry-pi/software
sudo python pixelpi.py --help usage: pixelpi.py [-h] [-v] {strip,array,pixelinvaders,fade,chase,pan,all_on,all_off,wiimote} ... positional arguments: {strip,array,pixelinvaders,fade,chase,pan,all_on,all_off,wiimote} sub command help? strip Stip Mode - Display an image using POV and a LED strip array Array Mode - Display an image on a pixel array pixelinvaders Pixelinvaders Mode - setup pixelpi as a Pixelinvaders slave fade Fade Mode - Fade colors on all LEDs chase Chase Mode - Chase display test mode pan Pan Mode - Pan an image across an array all_on All On Mode - Turn all LEDs On all_off All Off Mode - Turn all LEDs Off wiimote Wiimote Mode - move and LED witht he Wiimote optional arguments: -h, --help show this help message and exit -v, --version show program's version number and exit sudo python pixelpi.py strip --help usage: pixelpi.py strip [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] [--filename FILENAME] --array_height ARRAY_HEIGHT optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --filename FILENAME Specify the image file eg: hello.png --array_height ARRAY_HEIGHT Set the Y dimension of your pixel array (height) sudo python pixelpi.py array --help usage: pixelpi.py array [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] [--filename FILENAME] --array_width ARRAY_WIDTH --array_height ARRAY_HEIGHT optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --filename FILENAME Specify the image file eg: hello.png --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) sudo python pixelpi.py pixelinvaders --help usage: pixelpi.py pixelinvaders [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] --udp-ip UDP_IP --udp-port UDP_PORT optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --udp-ip UDP_IP Used for PixelInvaders mode, listening address --udp-port UDP_PORT Used for PixelInvaders mode, listening port sudo python pixelpi.py fade --help usage: pixelpi.py fade [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] --num_leds NUM_LEDS optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --num_leds NUM_LEDS Set the number of LEDs in the string sudo python pixelpi.py chase --help usage: pixelpi.py chase [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] --num_leds NUM_LEDS optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --num_leds NUM_LEDS Set the number of LEDs in the string sudo python pixelpi.py pan --help usage: pixelpi.py pan [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] [--filename FILENAME] --array_width ARRAY_WIDTH --array_height ARRAY_HEIGHT optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --filename FILENAME Specify the image file eg: hello.png --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) sudo python pixelpi.py all_on --help usage: pixelpi.py all_on [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] --num_leds NUM_LEDS optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --num_leds NUM_LEDS Set the number of LEDs in the string sudo python pixelpi.py all_off --help usage: pixelpi.py all_off [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] --num_leds NUM_LEDS optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --num_leds NUM_LEDS Set the number of LEDs in the string sudo python pixelpi.py wiimote --help usage: pixelpi.py wiimote [-h] [--chip {WS2801,LDP8806}] [--verbose] [--spi_dev SPI_DEV_NAME] [--refresh_rate REFRESH_RATE] --num_leds NUM_LEDS optional arguments: -h, --help show this help message and exit --chip {WS2801,LDP8806} Specify chip type LDP8806 or WS2801 --verbose enable verbose mode --spi_dev SPI_DEV_NAME Set the SPI device descriptor --refresh_rate REFRESH_RATE Set the refresh rate in ms (default 500ms) --num_leds NUM_LEDS Set the number of LEDs in the string
- each line pertains to a pixel, the first line is the first pixel in the string (closest to the RaspberryPi)
- each line has two entries (x and y location)
The image is mapped like so:
X0Y0 X1Y0 X2Y0... X0Y1 X0Y2 ...
- so if the first pixel of your array is the lower left hand corner (of a 6x6 array) the entry would be 0,6 if your second pixel is the lower second from left pixel the entry would be: 1,6