this is hardware I did to do this
http://learn.adafruit.com/light-painting-with-raspberry-pi/hardware
and with the help of Scott from
http://thegreatgeekery.blogspot.ca/
and you can see the video of the final work
https://www.youtube.com/watch?v=ED2u5O7GyEY
apt-get update
apt-get upgrade
sudo aptitude install python-imaging-tk
sudo apt-get install python-dev
#create a file called pixelpi.py and copy the code below
nano pixelpi.py
import sys
import RPi.GPIO as GPIO
import Image
import time
import argparse
import csv
import socket
import gc
def glediator():
spidev = file(args.spi_dev_name, "wb")
print ("Start glediator listener "+args.UDP_IP+":"+str(args.UDP_PORT))
sock = socket.socket( socket.AF_INET, # Internet
socket.SOCK_DGRAM ) # UDP
sock.bind( (args.UDP_IP,args.UDP_PORT) )
while True:
data, addr = sock.recvfrom(2048)
pixels = bytearray(len(data))
u=data[18:]
d=u+"yyyyyyyyyyyyyyyyyy"
for pixel_index in range(len(data) / 3):
pixels[((pixel_index)*3):]=bytearray(d[(pixel_index * 3):((pixel_index * 3) + 3)])
spidev.write(pixels)
spidev.flush()
gc.disable()
gamma = bytearray(256)
parser = argparse.ArgumentParser(add_help=True,version='1.0', prog='pixelpi.py')
subparsers = parser.add_subparsers(help='sub command help?')
common_parser = argparse.ArgumentParser(add_help=False)
common_parser.add_argument('--chip', action='store', dest='chip_type', default='WS2801', choices=['WS2801', 'LDP8806', 'LPD6803'], help='Specify chip type LPD6803, LDP8806 or WS2801')
common_parser.add_argument('--verbose', action='store_true', dest='verbose', default=True, help='enable verbose mode')
common_parser.add_argument('--spi_dev', action='store', dest='spi_dev_name', required=False, default='/dev/spidev0.0', help='Set the SPI device descriptor')
common_parser.add_argument('--refresh_rate', action='store', dest='refresh_rate', required=False, default=500, type=int, help='Set the refresh rate in ms (default 500ms)')
parser_glediator = subparsers.add_parser('glediator', parents=[common_parser], help='glediator Mode - setup pixelpi as a glediator slave')
parser_glediator.set_defaults(func=glediator)
parser_glediator.add_argument('--udp-ip', action='store', dest='UDP_IP', required=True, help='Used for glediator mode, listening address')
parser_glediator.add_argument('--udp-port', action='store', dest='UDP_PORT', required=True, default=6454, type=int, help='Used for glediator mode, listening port')
args = parser.parse_args()
args.func()
# then save the file
sudo chown `id -u`.`id -g` /dev/spidev0.*
sudo modprobe spi_bcm2708
now download the gladiator V1.0.6
now, go to the artnet file on glediator, leave everything the same, just change this
artnet.mumber_of_nodes = 1
artnet.ip_node_0 = 192.168.1.137
artnet.number_of_universes_per_node = 1
artnet.first_universe_id_per_node = 0
artnet.number_of_pixels_per_universe = 615
artnet.pixel_mapping = 40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,122,121,120,119,118,117,116,115,114,113,112,111,110,109,108,107,106,105,104,103,102,101,100,99,98,97,96,95,94,93,92,91,90,89,88,87,86,85,84,83,82,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,286,285,284,283,282,281,280,279,278,277,276,275,274,273,272,271,270,269,268,267,266,265,264,263,262,261,260,259,258,257,256,255,254,253,252,251,250,249,248,247,246,287,288,289,290,291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,368,367,366,365,364,363,362,361,360,359,358,357,356,355,354,353,352,351,350,349,348,347,346,345,344,343,342,341,340,339,338,337,336,335,334,333,332,331,330,329,328,369,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400,401,402,403,404,405,406,407,408,409,450,449,448,447,446,445,444,443,442,441,440,439,438,437,436,435,434,433,432,431,430,429,428,427,426,425,424,423,422,421,420,419,418,417,416,415,414,413,412,411,410,451,452,453,454,455,456,457,458,459,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481,482,483,484,485,486,487,488,489,490,491,532,531,530,529,528,527,526,525,524,523,522,521,520,519,518,517,516,515,514,513,512,511,510,509,508,507,506,505,504,503,502,501,500,499,498,497,496,495,494,493,492,533,534,535,536,537,538,539,540,541,542,543,544,545,546,547,548,549,550,551,552,553,554,555,556,557,558,559,560,561,562,563,564,565,566,567,568,569,570,571,572,573,614,613,612,611,610,609,608,607,606,605,604,603,602,601,600,599,598,597,596,595,594,593,592,591,590,589,588,587,586,585,584,583,582,581,580,579,578,577,576,575,574
#and this is the Cmd to run
sudo python pixelpi.py glediator --udp-ip 192.168.1.137 --udp-port 6454
#anything let me know how works. Luis
