python编写的串口程序
最近导师给了个GSM模块,需要通过RS232串口发送AT指令来对模块进行控制,于是看了看python的GUI设计和串口部分的资料,自己编写了一个串口发送的小程序,虽然有不少的bug,但是总体上还是能用的,先把程序留在这,以便后续修改。
感觉Python确实是一个很容易上手的语言,因为我事先都没看过pythonGUI设计和串口的资料,也就只用了一天就完成了这个小程序,感觉主要是python的语句确实很简洁,比方说在串口上,几句话就能实现串口发送和接收了。不过在做GUI设计方面,还是希望能像MFC那样可以拖拉控件,这样就方便了许多。
下面先发一张界面的截图:
好了,下面贴程序:
import wx
import serial
import time
import threading
class MyFrame(wx.Frame):
def __init__(self,parent):
print "MyFrame __init__"
wx.Frame.__init__(self,parent,-1,'My COM',size=(500,500))#窗口标题栏和大小
panel=wx.Panel(self)
sizer=wx.BoxSizer(wx.VERTICAL)
panel.SetSizer(sizer)
self.sendtxt=wx.StaticText(panel,-1,u'发送',(20,50),(50,15))#发送静态文本框
self.rectxt=wx.StaticText(panel,-1,u'接收',(20,200),(50,15))#接收静态文本框
self.baudratetxt=wx.StaticText(panel,-1,u'波特率',(20,320),(50,15))#波特率静态文本框
self.comtxt=wx.StaticText(panel,-1,'com',(20,350),(50,15))#com口静态文本框
baudratelist=['300','600','1200','2400','4800','9600','19200','38400'
,'43000','56000','57600','115200']
comlist=['com1','com2','com3','com4','com5','com6','com7','com8','com9']
self.baudratelistctr=wx.Choice(panel, -1, (70, 320), choices=baudratelist)
self.Bind(wx.EVT_CHOICE,self.OnbaudrateCH,self.baudratelistctr)#波特率下拉列表响应函数
self.comlistctr=wx.Choice(panel, -1, (70, 350), choices=comlist)
self.Bind(wx.EVT_CHOICE,self.OncomlistCH,self.comlistctr)#com下拉列表响应函数
self.baudratelistctr.SetSelection(5)
self.comlistctr.SetSelection(3)
self.sendctr = wx.TextCtrl(panel, -1,
pos = (100, 50), size = (200, 100),
style=wx.TE_MULTILINE|wx.TE_CENTER)
self.recctr = wx.TextCtrl(panel, -1,
pos = (100, 200), size = (200, 100),
style=wx.TE_MULTILINE|wx.TE_CENTER)
self.sendbutton=wx.Button(panel,-1,u'发送',pos=(350,50))#发送按钮
self.Bind(wx.EVT_BUTTON,self.OnSend,self.sendbutton)
self.ClearRecbutton=wx.Button(panel,-1,u'清空接收列表',pos=(350,200))
self.Bind(wx.EVT_BUTTON,self.OnClearRec,self.ClearRecbutton)
index=self.baudratelistctr.GetSelection()
BaudRate=self.baudratelistctr.GetString(index)#获取波特率
index=self.comlistctr.GetSelection()
ComNum=self.comlistctr.GetString(index)#获取com口
t = threading.Timer(0.1,self.myreceive)
t.start()
self.Centre()
global mycom
try:
mycom= serial.Serial(ComNum,BaudRate,timeout=1)
except:
wx.MessageBox('open com fail','error')
return None
def myreceive(self):
try:
n=mycom.inWaiting()
except:
return None
if n!=0:
str1=mycom.read(n)
self.recctr.Value=str1
t = threading.Timer(0.1,self.myreceive)
t.start()
def OnClearRec(self,event):
self.recctr.Value=''
def OnbaudrateCH(self,event):
global mycom
index=self.baudratelistctr.GetSelection()
BaudRate=self.baudratelistctr.GetString(index)#获取波特率
mycom.setBaudrate(BaudRate)
print mycom.inWaiting
def OncomlistCH(self,event):
global mycom
index=self.comlistctr.GetSelection()
ComNum=self.comlistctr.GetString(index)#获取com口
try:
mycom.setPort(ComNum)
except:
wx.MessageBox('change port fail','error')
return None
print mycom.inWaiting
def OnSend(self,event): #发送处理程序
value=self.sendctr.GetValue()
n=mycom.write(value)
''' def OnRec(self,event): #接收处理程序
n=mycom.inWaiting()
str1=mycom.read(n)
self.recctr.Value=str1'''
class MyApp(wx.App): #自定义应用程序对象
def OnInit(self):
print "MyApp OnInit"
self.frame = MyFrame(None)
id=self.frame.GetId()
print "Frame ID:",id
self.frame.Show(True)
return True
def OnExit(self):
print "MyApp OnExit"
mycom.close()
time.sleep(2)
if __name__ == '__main__':
print "Main start"
app = MyApp() #使用从wx.App继承的子类
print "Before MainLoop"
app.MainLoop()
print "After MainLoop"
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