对Python 简单串口收发GUI界面的实例详解

忙活了三个多小时，连学带做，总算是搞出来了一个具有基本功能的串口通信PC机的GUI界面，Tkinter在python中确实很好用，而且代码量确实也很少，不足的是Tkinter不自带combox，但是幸运的是我下载的2.7版本自带了包含有combox的ttk模块，于是乎问题就顺利解决了。

下面是源代码，一些错误提示功能还没有做，目前只是简单地实现了下位机与PC的通信界面，下位机还是用的STM32F103

#encoding=utf-8
__author__ = 'freedom'

from Tkinter import *
from serial import *
import ttk

class GUI(Frame):
 def __init__(self,master):
   frame = Frame(master)
   frame.pack()
   #串口设置相关变量
   self.port = 0
   self.baudrate = 9600
   #串口号提示
   self.lab1 = Label(frame,text = 'Serial Number')
   self.lab1.grid(row = 0,column = 0,sticky = W)
   #串口号选择下拉菜单
   self.boxValue = StringVar()
   self.boxChoice = ttk.Combobox(frame,textvariable = self.boxValue,state = 'readonly')
   self.boxChoice['value'] = ('COM1','COM2','COM3','COM4')
   self.boxChoice.current(0)
   self.boxChoice.bind('<<ComboboxSelected>>',self.Choice)
   self.boxChoice.grid(row = 1,column = 0,sticky = W)
   #波特率选择提示
   self.lab2 = Label(frame,text = 'Baudrate Set')
   self.lab2.grid(row = 2,column = 0,sticky = W)
   #波特率选择下拉菜单
   self.boxValueBaudrate = IntVar()
   self.BaudrateChoice = ttk.Combobox(frame,textvariable = self.boxValueBaudrate,state = 'readonly')
   self.BaudrateChoice['value'] = (9600,115200)
   self.BaudrateChoice.current(0)
   self.BaudrateChoice.bind('<<ComboboxSelected>>',self.ChoiceBaudrate)
   self.BaudrateChoice.grid(row = 3,column = 0,sticky = W)
   #输出框提示
   self.lab3 = Label(frame,text = 'Message Show')
   self.lab3.grid(row = 0,column = 1,sticky = W)
   #输出框
   self.show = Text(frame,width = 40,height = 5,wrap = WORD)
   self.show.grid(row = 1,column = 1,rowspan = 4,sticky = W)
   #输入框提示
   self.lab4 = Label(frame,text = 'Input here,please!')
   self.lab4.grid(row = 5,column = 1,sticky = W)
   #输入框
   self.input = Entry(frame,width = 40)
   self.input.grid(row = 6,column = 1,rowspan = 4,sticky = W)
   #输入按钮
   self.button1 = Button(frame,text = "Input",command = self.Submit)
   self.button1.grid(row = 11,column = 1,sticky = E)
   #串口开启按钮
   self.button2 = Button(frame,text = 'Open Serial',command = self.open)
   self.button2.grid(row = 7,column = 0,sticky = W)
   #串口关闭按钮
   self.button3 = Button(frame,text = 'Close Serial',command = self.close)
   self.button3.grid(row = 10,column = 0,sticky = W)
   #串口信息提示框
   self.showSerial = Text(frame,width = 20,height = 2,wrap = WORD)
   self.showSerial.grid(row = 12,column = 0,sticky = W)
   #串口初始化配置
   self.ser = Serial()
   self.ser.setPort(self.port)
   #self.ser.setBaudrate(self.baudrate)
   #self.ser.open()
   #print self.ser.isOpen()
   #print self.ser
 def Choice(self,event):
   context = self.boxValue.get()
   list = ["COM1",'COM2','COM3','COM4']
   if context in list:
     self.port = list.index(context)
     self.ser.setPort(self.port)
   print self.port
 def ChoiceBaudrate(self,event):
   self.baudrate = self.boxValueBaudrate.get()
   self.ser.setBaudrate(self.baudrate)
   print self.baudrate
 def Submit(self):
   context1 = self.input.get()
   n = self.ser.write(context1)
   output = self.ser.read(n)
   print output
   self.show.delete(0.0,END)
   self.show.insert(0.0,output)
 def open(self):
   self.ser.open()
   if self.ser.isOpen() == True:
     self.showSerial.delete(0.0,END)
     self.showSerial.insert(0.0,"Serial has been opend!")
 def close(self):
   self.ser.close()
   if self.ser.isOpen() == False:
     self.showSerial.delete(0.0,END)
     self.showSerial.insert(0.0,"Serial has been closed!")
root = Tk()
root.title("Serial GUI")
#root.geometry("3000x4000")
app = GUI(root)
root.mainloop()

来源：https://blog.csdn.net/freedom098/article/details/48211567