#1
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data lose
I have an EEG system I'd like to use to send data to vizard over our network.
EEG System --> BCI Software ---> Network (UDP) ---> Vizard so, when i send to data from BCI software to vizard, the data lose is induced. my BCI software data sampling rate is 256hz, how can i get all data from BCI software to Vizard ? |
#2
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You could try using the Python socket module to receive the data.
If you can send data via the parallel port you could try getting that in Vizard using the vizparallel.read command. |
#3
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HI.
i don't know how can use vizparallel.read . where can i search this example ?? if possible, i want to example code. |
#4
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attach my code
Code:
import viz import vizmat import vizinfo import socket import struct viz.go() viz.mouse.setVisible(viz.OFF) #The maximum amount of data to receive at a time MAX_DATA_SIZE = 1024 #The port to send/receive data on PORT = 8000 #Get the name of this computer COMPUTER_NAME = socket.gethostname() #Get the IP address of this computer COMPUTER_IP_ADDRESS = socket.gethostbyname('localhost') #Create a socket to send data over OutSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) OutSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) #Create a socket to receive data from InSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) InSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) InSocket.bind(('', PORT)) InSocket.setblocking(0) viz.directormode(viz.DIRECTOR_FAST) def SendData(data): OutSocket.sendto(data,(COMPUTER_IP_ADDRESS,PORT)) def ReceiveData(): try: return InSocket.recvfrom(MAX_DATA_SIZE) except: pass def onkeydown(key): if key == ' ': #Send data over the socket SendData('hello there') viz.callback(viz.KEYDOWN_EVENT,onkeydown) def ontimer(num): #Try to receive data from socket data = ReceiveData() if data: udp = struct.unpack(">d", data[0][:8])[0] right = open('c:\\new\\new.txt', 'a+') right.write(str(udp)+'\n') print 'Received Message:',udp viz.callback(viz.TIMER_EVENT,ontimer) viz.starttimer(0,0,viz.FOREVER) |
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