我试图做一个GUI,不断绘制从微处理器接收到信号。 我试图让使用的只有类这一点,但失败了,因为只有GUI类是oppend。 现在,我已经实现了线程(或至少我觉得我有!?),但每个线程只运行一次。 这让我相信,我不明白,主循环中的Tkinter是如何工作的,这样我就可以重拍我的代码在远离该线成为活跃?
import Tkinter
import tkMessageBox as messagebox
from serial import *
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure
import numpy as np
import time
import threading
go=0
x=[0.0001,0.0002,0.0003]
y=[3600,1000,2000]
stid=time.time()
root = Tkinter.Tk()
root.title("Serial gui")
class SensorThread(threading.Thread):
def run(self):
global run
global x
global y
global stid
print "run er ok"
if go==1:
print "go er ok"
ser = Serial(5, 9600, timeout=1)
f=ser.read(4)
ser.close()
x.append(time.time()-stid)
y.append(f)
class Foo:
def __init__(self, master):
print "foo ok"
frame = Tkinter.Frame(root)
self.button_left = Tkinter.Button(frame,text="Start",
command=self.start)
self.button_left.pack(side="left")
self.button_right = Tkinter.Button(frame,text="Stop",
command=self.stop)
self.button_right.pack(side="right")
self.button_midt = Tkinter.Button(frame, text='Quit', command=self.terminate)
self.button_midt.pack(side="bottom")
fig = Figure()
ax = fig.add_subplot(111, axisbg='black')
canvas = FigureCanvasTkAgg(fig,master=master)
canvas.show()
canvas.get_tk_widget().pack(side='top', fill='both', expand=1)
frame.pack()
line1, = ax.plot(x, y, 'r-') # Returns a tuple of line objects, thus the comma
line1.set_ydata(y)
fig.canvas.draw()
def start(self):
global go
go=1
print go
def stop(self):
global go
go=0
print go
def terminate(self):
root.quit() # stops mainloop
root.destroy() # this is necessary on Windows to prevent
# Fatal Python Error: PyEval_RestoreThread: NULL tstate
if __name__ == "__main__":
SensorThread().run()
Foo(root)
root.mainloop()
我希望你们中的一些可以帮助我使这个代码成为实时更新的阴谋计划。
超我已经在节目改变以下,
class SensorThread(threading.Thread):
def run(self):
global run
global x
global y
global stid
#print "run er ok"
if go==1:
print "go er ok"
ser = Serial(17, 9600, timeout=1)
f=ser.read(4)
ser.close()
x.append(time.time()-stid)
y.append(f)
SensorThread().start()
else:
SensorThread().start()
class Foo:
....
if __name__ == "__main__":
SensorThread().start()
Foo(root)
root.mainloop()
但它仍然没有更新的plottet图中,应该不是在Foo类做到这一点? 另外现在,当我退出或相当的python脚本仍然使用CPU功率的50%,可能是因为传感器螺纹现在运行,直到永远!?