我設計了一個船用發動機模擬器——它是一個使用稱為“BlueVision”的特定協議發送一些串行資料的程式。資料基于標題、塊編號、塊型別、實際資料（索引）、校驗和和頁腳進行編碼。由于如果您想更改實際資料中的值 - 那么校驗和會發生變化 - 我設計了在資料更改時使用正確校驗和重新計算塊。我制作了一個 GUI，允許我更改 2 個資料點的值以便能夠進行實時測驗。問題是我不知道如何正確使用執行緒或子行程并且視窗一直凍結. 該應用程式有效 - 但效果不佳，我一直在尋找類似的問題 - 確實找到了一些建議，但我無法實作它。有人可以幫忙嗎？PS：代碼最多是尷尬的-請不要判斷-我知道我可以做得更好-但這是我有時間能做的最好的事情。如果您沒有程式寫入的 COM 埠，您可能不清楚這個問題。
# Blue Vision is a MTU serial communication protocol - based on HEX values grouped in BLOCKS
import tkinter as tk
from tkinter import ttk
import time
import serial
def split_by_n(seq, n):
while seq:
yield seq[:n]
seq= seq[n:]
def after(self, ms, func=None, *args):
"""Call function once after given time.
MS specifies the time in milliseconds. FUNC gives the
function which shall be called. Additional parameters
are given as parameters to the function call. Return
identifier to cancel scheduling with after_cancel."""
win = tk.Tk()
win.title("GUI - TEST VERSION")
win.geometry("750x250")
label = tk.Label(win, text = "Main Engine Overspeed")
label.pack()
v = tk.StringVar()
v.set('00')
c = tk.StringVar()
c.set("00")
def setText(word):
v.set(word)
a = ttk.Button(win, text ="01", command =lambda:setText("01"))
a.pack()
b = ttk.Button(win, text="00", command = lambda:setText("00"))
b.pack()
label1 = tk.Label(win, text ="Main Engine Speed")
label1.pack()
name_entry = tk.Entry(win, textvariable=c)
name_entry.pack()
def task():
MyVar = v.get()
priEngSp =c.get()
if len(priEngSp) == 0:
priEngSp = '00'
block_3 = 'FAF500030002000000290100000001000100000001000001000000000000000000000000000222AF5F'
block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
block_5 = 'FAF5000500020000005600000000000000000000000000000000000000000000007F7F0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000034AAF5F'
block_6 = 'FAF5000600020000003D00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000234AF5F'
block_7 = 'FAF5000700030000008C000006280000064A0000064A0000068D0000066B0000068D0000068D000006AE0000000000000000000006AE000006070000060700000607000005E5000005A2000006070000064A00000000000000000000062A000006AE000005A20000350EFFFFF07C00003CDEFFFFE8AC00000000000000000000000000000000000012DEAF5F'
block_8 = 'FAF50008000300000070000000000000112900000000000000000000059C000027740000283C000047E000000000000000000000000000000000000000000000000000000000000000007FFFFFFF7FFFFFFF0000055100002CEC0000000000000000000000000000000000000DD1AF5F'
block_9 = 'FAF50009000200000020000000000000000000000000000000000000021AAF5F'
block_10 = 'FAF5000A0002000000260000000000000000000000000000000000000000000000000221AF5F'
block_11 = 'FAF5000B0003000000EC00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002E9AF5F'
block_12 = 'FAF5000C000200000045000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000242AF5F'
block_2 = 'FAF50002000200000074010001000000000000000000000000000000000000000000007F0000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002E9AF5F'
checksum = hex(0x00)
block_2split = list(split_by_n(block_2,2))
block_2split[10] = MyVar.upper() #Overspeed Alarm Position
for i in range(len(block_2split)-6):
checksum = hex(int(checksum, 16) int(block_2split[i], 16))
checksum_string = str(checksum)
checksum_actvalue = checksum_string[2:]
checksum_long = checksum_actvalue.rjust(8,'0').upper()
checksum_split = list(split_by_n(checksum_long,2))
block_2split[len(block_2split)-3] = checksum_split[3]
block_2split[len(block_2split)-4] = checksum_split[2]
block_2split[len(block_2split)-5] = checksum_split[1]
block_2split[len(block_2split)-6] = checksum_split[0]
Block_2Output = ''.join(str(item) for item in block_2split)
iEngineSpeed = int(priEngSp,10)
hEngineSpeed = hex(iEngineSpeed * 10)
sEngineSpeed = str(hEngineSpeed)[2:].upper()
while (len(sEngineSpeed)<8):
sEngineSpeed = '0' sEngineSpeed
block_4split = list(split_by_n(block_4,4))
sEngineSpeed_split = list(split_by_n(sEngineSpeed,4))
block_4split[5] = sEngineSpeed_split[0]
block_4split[6] = sEngineSpeed_split[1]
Block_4joint = ''.join(str(item) for item in block_4split)
Block_4joint_sp = list(split_by_n(Block_4joint,2))
checksumb4 = hex(0x00)
for i in range(len(Block_4joint_sp)-6):
checksumb4 = hex(int(checksumb4, 16) int(Block_4joint_sp[i], 16))
checksumb4_string = str(checksumb4)
checksumb4_actvalue = checksumb4_string[2:]
checksumb4_long = checksumb4_actvalue.rjust(8,'0').upper()
checksumb4_split = list(split_by_n(checksumb4_long,2))
Block_4joint_sp[len(Block_4joint_sp)-3] = checksumb4_split[3]
Block_4joint_sp[len(Block_4joint_sp)-4] = checksumb4_split[2]
Block_4joint_sp[len(Block_4joint_sp)-5] = checksumb4_split[1]
Block_4joint_sp[len(Block_4joint_sp)-6] = checksumb4_split[0]
Block_4Output = ''.join(str(item) for item in Block_4joint_sp)
blocks = [Block_2Output, block_3, Block_4Output, block_5, block_6, block_7, block_8, block_9, block_10, block_11, block_12]
with serial.Serial('COM5', '9600') as ser: #you might wanna comment this part out
for block in blocks:
print(block)
ser.write(bytes.fromhex(block.strip())) #you might wanna comment this part out
time.sleep(1)
win.after(200, task)
win.after(200, task)
win.mainloop()
uj5u.com熱心網友回復：
為避免凍結，一種方法是使用thread：
from threading import Thread
...
def task():
while True:
MyVar = v.get()
...
blocks = [Block_2Output, block_3, Block_4Output, block_5, block_6, block_7, block_8, block_9, block_10, block_11, block_12]
with serial.Serial('COM5', '9600') as ser: #you might wanna comment this part out
for block in blocks:
print(block)
ser.write(bytes.fromhex(block.strip())) #you might wanna comment this part out
time.sleep(1)
time.sleep(0.2)
# run task() in a thread
Thread(target=task, daemon=1).start()
win.mainloop()
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