我正致力于在被黑客MindFlex EEG读者与Arduino Uno到Raspberry Pi工作之间进行整合。我按照指示来到来源的来信，即here。这是代码：
from pygame import *
import random
import time
import serial
# set up the serial port
ser = serial.Serial('/dev/ttyACM0',9600)
# Clear the serial input buffer
ser.flushInput()
# variables for colours
black = [ 0, 0, 0]
white = [255,255,255]
red = [255, 0, 0]
blue = [0,0,255]
darkBlue = [0,0,128]
pink = [255,200,255]
green = [0,255,0]
orange = [255,102,0]
brown = [153,102,0]
yellow = [255,255,0]
purple = [128,0,128]
# gap in wall
gap = 200
# width and height of screen
width = 1000
height = 600
count_gap = int(height/gap)
# 0 = hard, 1 = easier, 2 is easiest
difficulty = 2
# class to create sprites and render them
class Sprite:
def __init__(self,xpos,ypos,filename):
self.x = xpos
self.y = ypos
self.bitmap = image.load(filename)
def render(self):
screen.blit(self.bitmap,(self.x,self.y))
# screen size
size=[width,height]
# initialise pygame
init()
# create the screen (window)
screen = display.set_mode(size)
# Caption to go at the top of the window
display.set_caption("Flappy EEG 2")
# set the music, its volume and start to play. -1 means infinite loop
mixer.music.load("Pinky_and_the_Brain.ogg")
mixer.music.set_volume(0.5)
mixer.music.play(-1)
# create sound for crash
crasheffect = mixer.Sound("ouch.ogg")
# fill the screen with blue, update the screen
# not really required but I like it
screen.fill(blue)
display.update()
#time.sleep(1)
# create the sprites for the brain, columns and the background image
playerbrain = Sprite(20,200,"brain_75.png")
column1 = Sprite(1200,100,"column1.png")
column2 = Sprite(1200,100,"column2.png")
background = Sprite(0,0,"background.png")
# set fonts for different purposes
scorefont = font.Font(None,60)
datafont = font.Font(None,20)
overfont = font.Font(None,100)
# set default values for some variables
score = 0
maxscore = 0
quit = 0
gameover = 0
# master loop for the program. If quit == 0 then exit program
while quit == 0:
# flush the serial port of all data to begin fresh
ser.flushInput()
gameover = 0
# set the height of top column
column1.y = (random.randrange(0,(count_gap))*gap)-800
# set the height of the bottom column
column2.y = column1.y + 800 + gap
# start of loop (using while) to move the columns
# start off screen to the right
x = width +50
# x>-100 means still valid (yes there is a minus in there)
# gameover when collision
# quit selected. either pressed q or click x on window
while x >-100 and gameover == 0 and quit == 0:
# increment the score and if higher than maxscore make maxscore = score
score = score + 1
if score > maxscore:
maxscore = score
# update columns location and set x positions
x = x - 50
column1.x = x
column2.x =x
data = ser.readline()
# print data
signal,att,med,delta,theta,lalpha,halpha,lbeta,hbeta,lgamma,hgamma
= data.split(",")
print "signal: " + signal
print "attention: " + att
print "data: " + data
intatt = int(att)
if intatt > 90:
intatt = 90
brainpos = intatt * 6
# set brain location based att (attention)
# is intatt near the gap above
if brainpos < column1.y +800 and brainpos > column1.y + 800 -
(difficulty * 10):
playerbrain.y = column1.y +800 +70
print "brain near top and moved down!"
# is intatt near gap bottom
elif brainpos > column2.y-75 and brainpos < column2.y +
(difficulty * 10):
playerbrain.y = column1.y +800 +70
print "brain near bottom and moved up!"
else:
playerbrain.y = brainpos
print "brain where is should be"
# print playerbrain.y
background.render()
playerbrain.render()
column1.render()
column2.render()
# display some information on screen
screen.blit(scorefont.render("Score: "+ str(score),1,white), (100, 5))
screen.blit(scorefont.render("High Score: "+
str(maxscore),1,white), (400, 5))
screen.blit(datafont.render("signal: "+ signal,1,white), (5, 570))
screen.blit(datafont.render("attention: "+ att,1,white), (150, 570))
screen.blit(datafont.render("playerbrain.y: "+
str(brainpos),1,white), (250, 570))
screen.blit(datafont.render("column1.y: "+
str(column1.y+800),1,white), (500, 570))
screen.blit(datafont.render("difficulty: "+
str(difficulty),1,white), (650, 570))
display.update()
# print playerbrain.y
# collision dection
if ((playerbrain.y < column1.y+801 or playerbrain.y >
column2.y-74) and (x <150 and x > 20)):
mixer.music.stop()
mixer.Sound.play(crasheffect)
print "BUMP"
gameover = 1
# check if clicked x on window to exit
for ourevent in event.get():
if ourevent.type == QUIT:
quit = 1
# has key been pressed. K_q is to quit
if ourevent.type == KEYDOWN:
if ourevent.key == K_DOWN:
playerbrain.y = playerbrain.y+10
if ourevent.key == K_UP:
playerbrain.y = playerbrain.y-10
if ourevent.key == K_q:
quit = 1
# if game over show message
while gameover == 1 and quit == 0:
screen.blit(overfont.render("GAME OVER",1,yellow), (380, 260))
display.update()
# then wait for a key to pressed before starting again
for ourevent in event.get():
if ourevent.type == KEYDOWN:
if ourevent.key == K_0:
difficulty = 0
score = 0
gameover = 0
mixer.music.play(-1)
if ourevent.key == K_1:
difficulty = 1
score = 0
gameover = 0
mixer.music.play(-1)
if ourevent.key == K_2:
difficulty = 2
score = 0
gameover = 0
mixer.music.play(-1)
if ourevent.key == K_SPACE:
score = 0
gameover = 0
mixer.music.play(-1)
if ourevent.key == K_q:
quit = 1
score = 0
gameover = 0
我通过Raspery Pi命令在sudo python flappybrain.py上执行此脚本。当然，我确保一切都正确连接。当我运行Arduino IDE时，我可以看到EEG的良好输出。
但是，当我执行脚本时，它会返回：
Traceback (most recent call last):
File "flappybrain.py", line 125, in <module>
signal,att,med,delta,theta,lalpha,halpha,lbeta,hbeta,lgamma,hgamma
= data.split(",")
ValueError: need more than 1 value to unpack
我没有在MindFlex未连接时出现此错误（它只是挂起，然后）。看了MindFlex的原始输出后，它就像数字一样;来自EEG的值。显然，脚本遇到了麻烦。典型的行可能如下所示：
20010,2140,43234,345,2342,2342,4534,5643,564,3244,7865
我可以看到脚本正在尝试做什么，而不是为什么它不能这样做。非常感谢您的帮助。
答案 0 :(得分：1)
在这种情况下，您遇到了一行输入，其中不包含这些分隔符（逗号）。您可以ValueError处理continue（仅限此行！），或者设置一个检查逗号并执行continue的警卫。或者，如果有意义，您可以过滤掉不包含逗号的行。
否则，如果输入无效，则必须拒绝此输入。
例如：
data = ser.readline()
# print data
EXPECTED_FIELD_COUNT = 11
if len(data.split(',')) != EXPECTED_FIELD_COUNT:
continue
signal,att,med,delta,theta,lalpha,halpha,lbeta,hbeta,lgamma,hgamma = data.split(",")
答案 1 :(得分：0)
确保type(data) <type 'str'>是str(data).split(",")
，否则你应该：
int(result[i])
如果你需要和int类型：
private delegate DependencyObject PredictFocusedElement(DependencyObject sourceElement, FocusNavigationDirection direction, bool treeViewNavigation, bool considerDescendants);
// get the default KeyboardNavigation instance
KeyboardNavigation keyboardNavigation = (KeyboardNavigation)typeof(FrameworkElement).GetProperty("KeyboardNavigation", BindingFlags.NonPublic | BindingFlags.Static).GetMethod.Invoke(null, null);
// create a delegate for the PredictFocusedElement method
_predictFocusedElement = (PredictFocusedElement)typeof(KeyboardNavigation).GetMethod("PredictFocusedElement", BindingFlags.NonPublic | BindingFlags.Instance, Type.DefaultBinder,
new Type[] { typeof(DependencyObject), typeof(FocusNavigationDirection), typeof(bool), typeof(bool) },
null).CreateDelegate(typeof(PredictFocusedElement), keyboardNavigation);