python 串口调试小工具

import serial.tools.list_ports
import serial
from tkinter import  Tk,StringVar,Label,Button,Listbox,Text,END
import time
import datetime
import re
import threading
import json
global serial_com
port_list = list(serial.tools.list_ports.comports())#读串口
print(port_list)
serial_com=[]
if len(port_list) <= 0:
    print( "The Serial port can't find!")

else:
    x=len(port_list)
    for i in range(x):
        port_list_0 =list(port_list[i])
        print(port_list_0[0])
        serial_com.append(port_list_0[0])
print(serial_com)
def thread_recv():#接收数据显示数据
    while True:

        for i in range(20):
            time_data=datetime.datetime.now()
            read = ser.readall()
            if len(read)>0:
                hexShow(read,time_data)
            if on_hit==False:
                break
        if on_hit == False:
            break
        data_text1.delete(1.0,END)

def freshen():#刷新串口
    global serial_com
    lis.delete(END,)
    port_list = list(serial.tools.list_ports.comports())# 读串口
    serial_com = []
    print(port_list)
    if len(port_list) <= 0:
        print("The Serial port can't find!")
    else:
        x = len(port_list)
        for i in range(x):
            port_list_0 = list(port_list[i])
            print(port_list_0[0])
            serial_com.append(port_list_0[0])
    print('端口',serial_com)
    var2.set(tuple(serial_com))
def print_selection(): #选择串口
    global value,serial_com
    value=lis.get(lis.curselection())
    var1.set(value)
    print(serial_com[lis.curselection()[0]])
    data1 = open("dump.txt", "r")
    data2 = json.load(data1)
    data1.close()
    data_text2.delete(1.0,END)
    data_text2.insert(1.0,data2)
on_hit =False
def open_serial():
    global on_hit,var3,ser,value
    src = data_text2.get(1.0, END).strip().replace('\n', '').encode()
    src1=bytes(src).decode('ascii')
    print(src1)
    time.sleep(0.1)
    data=open("dump.txt","w")
    json.dump(src1,data)
    data.close()
    print(1)

    if on_hit == False:
        print("port",value)
        print(src1)

        ser = serial.Serial(  # 下面这些参数根据情况修改
            port=value,
            baudrate=int(src1),
            parity=serial.PARITY_NONE,
            timeout=0.23,
            stopbits=serial.STOPBITS_ONE,
            bytesize=serial.EIGHTBITS)
        print("串口打开")

        var3.set('关闭串口')
        on_hit=True
        recv_data=threading.Thread(target=thread_recv)
        recv_data.start()
    else:
        on_hit=False
        ser.close()
        var3.set("打开串口")
        print("串口关闭")
def hexShow(argv,time_data):#接收数据格式调整
    result = ''
    hlen = len(argv)
    for i in range(hlen):
        hvol = argv[i]
        hhex = hex(hvol)[2:]

        result += hhex.upper() + ' '
    result="%s:"%time_data+result
    data_text1.insert(1.0,result+'\n')


def get_data():#协议输入提取和转码
    global ser
    req1=[]
    src = data_text.get(1.0, END).strip().replace('\n', '').encode()

    print(len(src))
    print(src)
    req = re.findall(r"[^' ']",src.decode())
    print(req)
    j = 0
    while True:
        try:


            data=req[j]+req[j+1]

            req1.append(data)

            if j+1<len(req):
                j+=2
        except IndexError :
            break
    print(req1)

    st=[]
    for i in range(len(req1)):
        a = int(req1[i],16)
        print(a)
        st.append(a)
    print(st)
    a=str(len(st))+'B'
    data=bytes(st)
    ser.write(data)


init_window = Tk()
init_window.title('串口发送工具')
init_window.geometry("1000x250+10+10")
var1=StringVar()

l=Label(init_window,bg='yellow',width=14,textvariable=var1)
l.grid(row=0,column=0)

var3=StringVar()
var3.set('打开串口')
b1=Button(init_window,text='串口',width=10,height=1,command=print_selection)
b1.grid(row=1,column=0)
b2=Button(init_window,textvariable=var3,width=10,height=1,command=open_serial)
b2.grid(row=1,column=2)
b2=Button(init_window,text="发送",width=10,height=1,command=get_data)
b2.grid(row=1,column=4)
b3=Button(init_window,text="刷新串口",width=9,height=1,command=freshen)
b3.place(x=15,y=150)
t=Label(init_window,text="波特率")
t.grid(row=0,column=1)
var2=StringVar()
var2.set(tuple(serial_com))
print("chuangk",serial_com)
lis =Listbox(init_window,width=10,height=5,listvariable=var2)#显示串口
lis.place(x=15,y=55)
data_text = Text(init_window,width=80,height=1)#输入传输字符
data_text.grid(row=1,column=3)
data_text1=Text(init_window,width=70,height=10)#接收字符
data_text1.grid(row=2,column=3)
data_text2=Text(init_window,width=10,height=1)#波特率设置
data_text2.grid(row=1,column=1)

init_window.mainloop()