开辟线程进行pc(ubuntu)和arduino串口通信的python程序

#!/usr/bin/env python
#coding=utf-8
import serial
import time
import threading
import glob

inhead = 'RECV'			#接收数据头
outhead = 'SEND'		#发送数据头

class SerialData(threading.Thread):#创建threading.Thread的子类SerialData
def __init__(self):
threading.Thread.__init__(self)		#初始化线程
def open_com(self, port, baud):			#打开串口
self.ser = serial.Serial(port, baud, timeout = 0.5)
return self.ser
def com_isopen(self):  						#判断串口是否打开
return self.ser.isOpen()
def send_data(self, data, outhead = outhead):	#发送数据
self.ser.write(outhead + data)
def next(self):  									#接收的数据组
all_data = ''
#if inhead == self.ser.read(1) :
all_data =  self.ser.readline()		#读一行数据
return  all_data
def close_listen_com(self):					#关闭串口
return self.ser.close()

if __name__ == '__main__':
try:
rec_data = SerialData()  				#为串口开辟线程
allport = glob.glob('/dev/ttyACM*')  #搜索匹配字符 ‘/dev/ttyACM’的设备
port = allport[0]
baud = 9600
openflag = rec_data.open_com(port, baud) #打开串口
if openflag:
print 'i open %s at %s successfully!'%(allport[0], baud)
rec_data.send_data('---I am the data from pc to mcu ,now i am back to pc !:)')#发送数据
while True:
com_data = rec_data.next()
if not com_data == '':
print 'Look what i got :%s'%(com_data)
rec_data.close_listen_com()#关闭串口

except KeyboardInterrupt:
rec_data.close_listen_com()#关闭串口
if not rec_data.com_isopen():#判断串口是否关闭
print '''i..........closed........the serial......
i........am ...........dead......!!!!!!'''