新手求助基于python串口通信程序怎么修改，一直不对报错，各种办法都试过了，还是跑不了（TAT）

[yyixx11]

小弟头回在这里发帖，我是用python3.5的idle写的，我的目的就是用usb uart接收发送我板子上的二进制代码到pc，没什么python基础，边学边写还有一堆错误真实太痛苦了，图形界面还好pyserial怎么搞真实要命了，网上看的头晕也没搞出来，麻烦大神帮我看看

from tkinter import*
from tkinter .ttk import*
import sys as sys
import serial
import time
import threading
isOpened = threading.Event()

root = Tk()
root.title('RS serial communication')
txt0 = Text(root,width=80,height=24,border=5)
txt0.pack(side='top')
sec0 = Frame(root,border=4)
sec0.pack(side='top',anchor='w')
sec1 = Frame(root,border=4)
sec1.pack(side='top',anchor='w')
sec2 = Frame(root,border=4)
sec2.pack(side='top',anchor='w')

comx = StringVar(root,'COM4')
Label(sec0,text='com： ').pack(side='left')
Combobox(sec0,text=comx,values=['COM3', 'COM4'],width='12').pack(side='left')

baud = StringVar(root,"9600")
Label(sec0,text='  buad： ').pack(side='left')
Combobox(sec0,textvariable=baud,values=['4800','9600','19200'],width='12').pack(side='left')

dlen = StringVar(root,'8')
Label(sec1,text='data： ').pack(side='left')
Combobox(sec1,textvariable=dlen,values=['9','8','7','6','5','4'],width='12').pack(side='left')

slen = StringVar(root,'1')
Label(sec1,text='  stop： ').pack(side='left')
lst3 = Combobox(sec1,textvariable=slen,values=['1','2'],width='12').pack(side='left')

chck = StringVar(root,'None')
Label(sec1,text='  parity： ').pack(side='left')
lst4 = Combobox(sec1,textvariable=chck,values=['None','Odd','Even'],width='12').pack(side='left')

inpt = StringVar(root,'')
Label(sec2,text='input： ').pack(side='left')
Entry(sec2,width=30,textvariable=inpt).pack(side='left')


isOpened = threading.Event()


ser = serial.Serial()

def COMOpen():
    if not isOpened.isSet():
        try:
            ser.timeout = 1
            ser.xonxoff = 0   
            ser.port = ComX.get()
            ser.parity = Chck.get()[0]
            ser.baudrate = int(Baud.get())
            ser.bytesize = int(Dbit.get())
            ser.stopbits = int(Sbit.get())
            ser.open()
        except Exception:
            print ("COM Open Error!")
        else:
            isOpened.set()
            Open.set('close')

    else:
        ser.close()
        isOpened.clear()
        Open.set('open serial')

Open = StringVar(root,'open serial')
Button(sec0,textvariable=Open,width=16,command = COMOpen()).pack(side='left')


def Submit():
        datain = ser.write(inpt.get())

dataout = ser.read()
txt0.insert(0.0,dataout)

def Clear():
        txt0.delete(0.0,END)

Send = StringVar(root,'send')
Button(sec2,textvariable=Send,width=9,command = Submit()).pack(side='left')

Clear = StringVar(root,'clear')
Button(sec2,textvariable=Clear,width=9,command = Clear()).pack(side='left')

root.mainloop()

这里是错误Traceback (most recent call last):
line 79, in <module>
dataout = ser.read()
File "C:\Users\Yin Jinyue\AppData\Local\Programs\Python\Python35-32\lib\site-packages\serial\serialwin32.py", line 263, in read
raise portNotOpenError
serial.serialutil.SerialException: Attempting to use a port that is not open

这是图

有两个按钮send和clear在run的时候消失了

[yyixx11]

来个人啊

[sprawling]

提示串口打开错误，用测试程序先试试看。

[yyixx11]

引用 2 楼 sprawling 的回复:

提示串口打开错误，用测试程序先试试看。

你是说和代码62行一样的COM Open Error!吗？没有连东西肯定阿

[panghuhu250]

不要GUI, 直接ser.port="COM4", ..., ser.open(), ser.write(...), print(ser.read())等等, 先保证你serial模块的用法没有问题 (这一部分很适合在python shell中做). 然后再连GUI部分. GUI部分有一些问题:

Button(sec0,textvariable=Open,width=16,command = COMOpen()).pack(side='left')

应该为

Button(sec0,textvariable=Open,width=16,command = COMOpen).pack(side='left')

COMOpen没有括号. COMOpen要在按钮被点击时执行, 而不是建立按钮时执行. submit和clear也一样.

dataout = ser.read()
txt0.insert(0.0,dataout)

应该放到一个函数中, 在适当的时候执行. 现在是程序运行的时候马上就读ser. 以前这儿有人贴过串口控制的脚本, 你可以翻翻老帖子.

[sprawling]

修改了一下,简单试试还是可以用的.

#!/usr/bin/python
# -*- coding:utf-8 -*-


from Tkinter import *
from ttk import *
import sys
import platform
import serial
import time
import threading
import ipdb

#ipdb.set_trace()

running = False

def recevie(obj):
    global running
    print "start rx:\n"
    while(running == True):
        rx_len = obj.inWaiting()
        if(rx_len):
            s0 = obj.read(rx_len)
            print "rx",s0
            txt0.insert(END,s0)
    print "stop rx:\n"

def COMOpen():
    global running
    if not isOpened.isSet():
        try:
            ser.timeout = 1
            ser.xonxoff = 0   
            ser.port = comx.get()
            ser.parity = chck.get()[0]
            ser.baudrate = int(baud.get())
            ser.bytesize = int(dlen.get())
            ser.stopbits = int(slen.get())
            print ser.port
            ser.open()
            running = True
            print running
            t = threading.Thread(target=recevie, args=(ser,))
            t.start()
        except Exception, e:
            print ("COM Open Error!"),e
        else:
            isOpened.set()
            Open.set('close')

    else:
        running = False
        ser.close()
        isOpened.clear()
        Open.set('open serial')


def Submit():
    s1 = inpt.get()
    print s1
#    txt0.insert(END,s1)
    datain = ser.write(s1)


def f_Clear():
    print "delete all"
    txt0.delete(0.0,END)

def test():
    dataout = ser.read()
    txt0.insert(0.0,dataout)
    
            
            
if platform.system() == 'Linux':
	sp_list=['ttyUSBS0', 'ttyUSBS1']
elif platform.system() == 'Windows':
	sp_list=['COM1','COM6']

ser = serial.Serial()

if __name__ == "__main__":
    isOpened = threading.Event()
    
    root = Tk()
    root.title('RS serial communication')
    txt0 = Text(root,width=80,height=24,border=5)
    txt0.pack(side='top')
    sec0 = Frame(root,border=4)
    sec0.pack(side='top',anchor='w')
    sec1 = Frame(root,border=4)
    sec1.pack(side='top',anchor='w')
    sec2 = Frame(root,border=4)
    sec2.pack(side='top',anchor='w')
    
    comx = StringVar(root,sp_list[0])
    Label(sec0,text='com: ').pack(side='left')
    Combobox(sec0,text=comx,values=sp_list,width='12').pack(side='left')
    
    baud = StringVar(root,"9600")
    Label(sec0,text='  buad: ').pack(side='left')
    Combobox(sec0,textvariable=baud,values=['4800','9600','19200'],width='12').pack(side='left')
    
    dlen = StringVar(root,'8')
    Label(sec1,text='data: ').pack(side='left')
    Combobox(sec1,textvariable=dlen,values=['9','8','7','6','5','4'],width='12').pack(side='left')
    
    slen = StringVar(root,'1')
    Label(sec1,text='  stop: ').pack(side='left')
    lst3 = Combobox(sec1,textvariable=slen,values=['1','2'],width='12').pack(side='left')
    
    chck = StringVar(root,'None')
    Label(sec1,text='  parity: ').pack(side='left')
    lst4 = Combobox(sec1,textvariable=chck,values=['None','Odd','Even'],width='12').pack(side='left')
    
    inpt = StringVar(root,'')
    Label(sec2,text='input: ').pack(side='left')
    Entry(sec2,width=30,textvariable=inpt).pack(side='left')

    Send = StringVar(root,'send')
    Button(sec2,textvariable=Send,width=9,command = Submit).pack(side='left')

    Clear = StringVar(root,'clear')
    Button(sec2,textvariable=Clear,width=9,command = f_Clear).pack(side='left')
    
    Open = StringVar(root,'open serial')
    Button(sec0,textvariable=Open,width=16,command = COMOpen).pack(side='left')
    
    isOpened = threading.Event()
    
    root.mainloop()

[yyixx11]

引用 4 楼 panghuhu250 的回复:

不要GUI, 直接ser.port="COM4", ..., ser.open(), ser.write(...), print(ser.read())等等, 先保证你serial模块的用法没有问题 (这一部分很适合在python shell中做). 然后再连GUI部分. GUI部分有一些问题:

Button(sec0,textvariable=Open,width=16,command = COMOpen()).pack(side='left')

应该为

Button(sec0,textvariable=Open,width=16,command = COMOpen).pack(side='left')

COMOpen没有括号. COMOpen要在按钮被点击时执行, 而不是建立按钮时执行. submit和clear也一样.

dataout = ser.read()
txt0.insert(0.0,dataout)

应该放到一个函数中, 在适当的时候执行. 现在是程序运行的时候马上就读ser. 以前这儿有人贴过串口控制的脚本, 你可以翻翻老帖子.

谢谢啦，你指出的这几个地方改了之后立刻没错了

[yyixx11]

引用 5 楼 sprawling 的回复:

修改了一下,简单试试还是可以用的. 删

谢谢，我这两天板出问题没法试，这坛子真是比别的论坛热心人多多了