arduino串口绘图_Arduino 串口数据可视化

Begin

前一阵子我们学校搞什么无碳小车，要用单片机，我用的是Arduino，主要是超声波模块的使用。超声波模块代码不难，调试难啊，因为要求低延迟，我把读数周期调整到1ms，这下好了，数字哗哗的从眼前飞走，根本看不清楚好吗！！！没办法，这种时候就应该让python来帮忙了。

[注:]依赖matplotlib,serial等库，只运行于linux，os x 系统中，Windows不支持！因为我懒得弄windows的串口通信了。

Then

#-.- coding:utf-8

import matplotlib.pyplot as plt

import matplotlib.animation as animation

import time

import serial

import serial.tools.list_ports

import numpy as np

from Tkinter import *

import matplotlib

from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

from matplotlib.figure import Figure

import threading

root=Tk()

root.resizable(width=0, height=0)

root.title("By Kid")

port_list = list(serial.tools.list_ports.comports())

if len(port_list) <= 0:

print "The Serial port can't find!"

else:

port_list_0 =list(port_list[0])

port_serial = port_list_0[0]

ser = serial.Serial(port_serial,9600,timeout = 60)

print "check which port was really used >",ser.name

ser = serial.Serial(ser.name,9600,timeout = 1)

#ser = serial.Serial("/dev/cu.usbmodem1421",9600,timeout = 1)

matplotlib.use('TkAgg')

fig = plt.figure()

ax = fig.add_subplot(1,1,1)

xs = []

ys = []

k = 0

Is_Run = 1

y_low_int = 0

y_high_int = 0

Is_Auto = 1

def test():

global ys

while Is_Run:

try:

line = ser.readline()

try:

b = float(line)

ys.append(b)

ys = ys[-50:]

except :

print line

print "ValueError"

continue

except :

print "no data receive"

#root.after(100,test)

continue

#time.sleep(0.001)

def ani():

global xs

global ys

global k

while Is_Run:

k += 1

if k > 60000 :

k = 0

xs.append(k)

if len(xs) :

xs = xs[-50:]

try:

ax.clear()

if (y_low_int < y_high_int) and not Is_Auto :

plt.ylim([y_low_int,y_high_int])

ax.plot(xs,ys)

canvas.show()

except :

#print line

print "Show Error"

#continue

#time.sleep(0.001)

def Set_ylim():

global y_low_int

global y_high_int

global Is_Auto

try :

y_low_int=int(y_low.get())

y_high_int=int(y_high.get())

Is_Auto = 0

except :

print "Input Error"

def Set_Auto():

global Is_Auto

Is_Auto = 1

def Quit():

global Is_Run

Is_Run = 0

print "close!"

root.quit()

def start():

global Start_B

Start_B.config(state = 'disable')

recvth = threading.Thread(target=test,args={})

drawth = threading.Thread(target=ani,args={})

recvth.start()

#time.sleep(2000)

drawth.start()

Start_B = Button(root,text='Begin!!',command=start)

Start_B.grid(row=1,column=0)

#List_COM = Listbox(root,height=1)

#List_COM.grid(row=2,column=0)

Label(root,text='y_low').grid(row=1,column=1)

y_low=Entry(root)

y_low.grid(row=1,column=2)

y_low.insert(0,'100')

Label(root,text='y_high').grid(row=2,column=1)

y_high=Entry(root)

y_high.grid(row=2,column=2)

y_high.insert(0,'700')

Button(root,text='Set_Y',command=Set_ylim).grid(row=1,column=3)

Button(root,text='Auto ',command=Set_Auto).grid(row=2,column=3)

canvas = FigureCanvasTkAgg(fig, master=root)

canvas.get_tk_widget().grid(row=0, columnspan=4)

root.protocol("WM_DELETE_WINDOW", Quit)

root.mainloop()

使用时，程序仅仅支持分析数值的可视化，不分析字符串或其他符号，而且，使用时请关闭其他的串口监听工具，比如Arduino IDE 自带的串口通信程序，因为可能会造成误码。

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python大法好！！