Qt的定时器0.0001

最新推荐文章于 2024-10-12 18:59:01 发布
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本文介绍了使用Qt框架创建一个简单的定时器应用的初衷和设计思路。目标是实现远程操控的定时任务，包括启动和关闭软件以及播放音乐。通过XML存储任务列表，使用DOM解析XML并展示在TableView中。目前遇到的问题主要集中在理解和使用QThread、信号槽以及事件循环上。

因为管理打铃，每当天气比较奇怪的时候，就要去做临时的调整，超级麻烦。先要关闭原来的打铃软件，再等时间到了打铃，然后过一段时间重新打开那个打铃软件，跑来跑去。所以打算自己做一个定时器来帮忙完成这项工作，希望能做到，远程操控，一次搞定。不过做事要一步一步来，先就一次搞定吧。

定时器需要有一个任务列表，再界面上用一个tableview显示，同时打算永xml结构进行存储方便下次重新运行。

<?xml version="1.0" encoding="UTF-8"?>
<Missons>
<misson>
<time>8:30</time>
<action>launch</action>
<path>D:/</path>
</misson>
<misson>
<time>9:30</time>
<action>play</action>
<path>D:/</path
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import sys sys.path.append(‘/UI/Login’) from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtWidgets import QApplication, QWidget #from PyQt5.QtCore import QThread, pyqtSignal,QTimer from Login import Ui_Form as Login_ui from CanOBD import Ui_MainWindow as CanOBD_ui from PyQt5.QtWidgets import QMessageBox import time #import threading class LogInViewUI(QtWidgets.QWidget,Login_ui): def int(self): super(LogInViewUI,self).int() self.setupUi(self) def connectslot(self): #self.m_loginbuttonOn.clicked.connect(self.login_button) self.mloginButton.clicked.connect(self.login_button) def login_button(self): if self.mPassWordEdit.acceptRichText() == “”: QMessageBox.warning(self, ‘警告’, ‘密码不能为空，请输入！’) return None # 1打开新窗口 CanOBDWidget.show() # 2关闭本窗口 LoginWidget.close() class CanOBDViewUI(QtWidgets.QWidget,CanOBD_ui): def int(self): super(CanOBDViewUI,self).int() self.setupUi(self) if name == “main”: app = QtWidgets.QApplication(sys.argv) #MainWidget = QtWidgets.QDockWidget() LoginWidget = QtWidgets.QWidget() CanOBDWidget = QtWidgets.QMainWindow() loginui = LogInViewUI() CanOBDui = CanOBDViewUI() loginui.setupUi(LoginWidget) loginui.connectslot() CanOBDui.setupUi(CanOBDWidget) CanOBDui.Serialconnectslot() LoginWidget.show() sys.exit(app.exec_()) 这是main文件 import serial import time import struct import queue import threading from datetime import datetime CanOBDItemList = [[0,0,0,0,0]] CanPGNItemList = [[0,0,0,0]] Frame_start = b’\xFF’ Frame_end = b’\x55’ Frame_data_style_len = 6 Frame_Data_Len = 0 frame_buffer = bytearray() class CanInfShow_Item: def int(self,CanID,CanFramType,Len,CanDataInf): self.SystemCycle = datetime.strftime(“%Y-%m-%d %H:%M:%S.%f”)[:-3], self.CanID = CanID, self.CanFrame = CanFramType, self.CanDataLen = Len, self.CanData = CanDataInf class CanPGNShow_Item: def int(self, PGNID, CanID, CanData, Signal): self.PGNID = PGNID, self.CanID = CanID, self.CanData = CanData, self.Signal = Signal class SerialPort: def init(self, port, baudrate): 初始化串口参数 self.port = port self.baudrate = baudrate self.ser = serial.Serial( port=self.port, baudrate=self.baudrate, bytesize=serial.EIGHTBITS, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE ) 等待串口连接稳定 self.last_data_time = time.time() # 新增：最后接收数据的时间戳 self.cycle_dict = {} # 存储{帧ID: [上次时间戳, 当前周期]} self.last_frame_time = {} # 存储每个ID的最后出现时间 self.data_updated_ids = set() # 存储数据变化的CAN ID self.new_added_ids = set() # 存储新增的CAN ID self.state = 0 self.current_frame = bytearray() self.expected_length = 0 self.raw_data_queue = queue.Queue(maxsize=10000) self.data_lock = threading.Lock() self.worker_threads = [] self._init_state_handlers() time.sleep(0.2) if not self.ser.isOpen(): print(“串口打开失败！”) def close(self): # 关闭串口连接 if self.ser.isOpen(): self.ser.close() def send(self, data): # 发送数据 if self.ser.isOpen(): try: self.ser.write(data.encode(‘utf-8’)) except serial.SerialException as e: print(f"发送数据失败: {e}“) # def recv(self): # # 接收数据 # if self.ser.isOpen(): # data = self.ser.read(self.ser.inWaiting()) # if data: # 有数据时更新时间戳 # self.last_data_time = time.time() # return data def recv(self, chunk_size=4096): if self.ser.isOpen(): # 每次最多读取1024字节 data = self.ser.read(min(self.ser.inWaiting(), chunk_size)) if data: # self.last_data_time = time.time() return data return None def del(self): self.close() def SerialIsOpen(self): if self.ser.isOpen(): return 1 else: return 0 def start_reading(self): self.recv_thread = threading.Thread(target=self._recv_worker, daemon=True) self.parse_thread = threading.Thread(target=self._parse_worker, daemon=True) self.recv_thread.start() self.parse_thread.start() self.worker_threads = [self.recv_thread, self.parse_thread] def _recv_worker(self): while self.ser.isOpen(): data = self.recv(chunk_size=4096) # 每次最多读4KB if data: self.raw_data_queue.put(data) else: time.sleep(0.001) def _init_state_handlers(self): self.state_handlers = { 0: self._state0_wait_ff, 1: self._state1_wait_55, 2: self._state2_length_high, 3: self._state3_length_low, 4: self._state4_type_field, 5: self._state5_reserved_field, 6: self._state6_can_channel, 7: self._state7_message_count, 8: self._state8_receive_data, 9: self._state9_checksum, 10: self._state10_verify } def _parse_worker(self): “”“优化后的状态机处理””" while True: try: data = self.raw_data_queue.get(timeout=0.1) for byte in data: handler = self.state_handlers.get(self.state) if handler: handler(byte) else: self.reset_state() except queue.Empty: continue # — 各状态处理函数 — def _state0_wait_ff(self, byte): if byte == 0xFF: self.current_frame.append(byte) self.state = 1 def _state1_wait_55(self, byte): if byte == 0x55: self.current_frame.append(byte) self.state = 2 else: self.reset_state() def _state2_length_high(self, byte): self.current_frame.append(byte) self.state = 3 def _state3_length_low(self, byte): self.current_frame.append(byte) length_high = self.current_frame[2] length_low = byte self.expected_length = (length_high << 8) | length_low self.state = 4 def _state4_type_field(self, byte): self.current_frame.append(byte) self.state = 5 def _state5_reserved_field(self, byte): self.current_frame.append(byte) self.state = 6 def _state6_can_channel(self, byte): self.current_frame.append(byte) self.state = 7 def _state7_message_count(self, byte): self.current_frame.append(byte) self.num_messages = byte self.state = 8 self.messages_received = 0 # 重置计数器 def _state8_receive_data(self, byte): self.current_frame.append(byte) self.messages_received += 1 if self.messages_received >= self.num_messages * 12: self.state = 9 def _state9_checksum(self, byte): self.current_frame.append(byte) self.state = 10 def _state10_verify(self, _): if self.verify_checksum(): self.Frame_analoy_process(bytes(self.current_frame)) else: print(“校验失败，丢弃当前帧”) self.reset_state() def verify_checksum(self): “”" 验证校验和：从第2字节到倒数第二个字节之和 & 0xFF “”" data_to_check = self.current_frame[2:-1] # 从第2字节到最后一个校验位之前 checksum = sum(data_to_check) & 0xFF return checksum == self.current_frame[-1] def reset_state(self): “”" 重置状态机 “”" self.state = 0 self.current_frame = bytearray() self.expected_length = 0 self.messages_received = 0 #报文解析 def Frame_analoy_process(self, Framedata): # 检查帧类型 (0x0C 0x98) if len(Framedata) < 8 or Framedata[4] != 0x0C or Framedata[5] != 0x98: return try: FrameNum = int(Framedata[7]) except IndexError: return # 检查是否有足够数据 if len(Framedata) < 12 * FrameNum + 8: return current_time = time.time() # 获取当前精确时间戳 for index in range(0,FrameNum): # 时间戳 # Cantime = datetime.now().strftime(“%Y-%m-%d %H:%M:%S.%f”)[:-3] Cantime=0 try: id_bytes = [ Framedata[12 * index + 11], # LSB Framedata[12 * index + 10], Framedata[12 * index + 9], Framedata[12 * index + 8] # MSB ] except IndexError: continue # 格式化为8位大写十六进制 CanID = ‘’.join(format(b, ‘02X’) for b in id_bytes) # 提取ID字节 CanFramType = “Cycle” Len = 8 CanDataSpace = ‘’ PGNdata = ‘’ PGNID = int(Framedata[12 * index + 9] ) + int(Framedata[12 * index + 10]* 0x100) PGNSignl = self.Frame_analoy_PGN_Signal(PGNID,Framedata[12 * index + 12:]) # 提取数据部分 for posindex in range(0,8): PGNdata += str(hex(Framedata[12 * index + 12 + posindex])[2:]) try: CanDataSpace = ’ '.join( format(Framedata[12 * index + 12 + posindex], ‘02X’) for posindex in range(8) ) except IndexError: continue CanItemData = [Cantime, CanID, CanFramType, Len, CanDataSpace] print(CanDataSpace) if PGNSignl != None: SignalItemData = [hex(PGNID)[2:], CanID, PGNdata, PGNSignl] if all(not sublist for sublist in CanPGNItemList) or CanPGNItemList[0][0] == 0: if len(CanPGNItemList): CanPGNItemList.pop(0) CanPGNItemList.insert(0, SignalItemData) else: Listpos = self.find_in_2d_list(CanPGNItemList, CanID) if None != Listpos: CanPGNItemList[Listpos[0]] = SignalItemData else: CanPGNItemList.append(SignalItemData) if CanID in self.last_frame_time: last_time = self.last_frame_time[CanID] cycle = (current_time - last_time) * 1000 # 转换为毫秒 # 平滑处理：使用加权平均减少抖动 # if CanID in self.cycle_dict: # old_cycle = self.cycle_dict[CanID] # self.cycle_dict[CanID] = 0.7 * old_cycle + 0.3 * cycle # else: self.cycle_dict[CanID] = cycle else: self.cycle_dict[CanID] = 0 # 首次出现，周期设为0 self.last_frame_time[CanID] = current_time # 更新列表 if not CanOBDItemList or CanOBDItemList[0][0] == 0: if CanOBDItemList and CanOBDItemList[0][0] == 0: CanOBDItemList.pop(0) CanOBDItemList.insert(0, CanItemData) self.new_added_ids.add(CanID) # 新增标志 else: Listpos = self.find_in_2d_list(CanOBDItemList, CanID) if Listpos is not None: CanOBDItemList[Listpos[0]] = CanItemData self.data_updated_ids.add(CanID) # 更新标志 else: CanOBDItemList.append(CanItemData) self.new_added_ids.add(CanID) # 新增标志 self.last_data_time = time.time() # 解析到有效帧时更新时间 # print(self.cycle_dict[“18F0090B”]) # if “18F0090B” in self.cycle_dict: # print( self.cycle_dict[“18F0090B”]) def find_in_2d_list(self,matrix, target): for i, row in enumerate(matrix): if any(x == target for x in row): return (i, row.index(target)) # 使用row.index()找到具体列的索引 return None def Frame_analoy_PGN_Signal(self,PGNID, Framedata): #车速 SignalVal = 0 if PGNID == 0xFEF1: SignalVal = float(int(Framedata[2] * 0x100) + int(Framedata[3]) / 256.0) elif PGNID == 0xF004: SignalVal = str(int(Framedata[2] & 0x7F)) + ‘|’+ str(float(int(Framedata[4] * 0x100) + int(Framedata[3]) / 125.0)) elif PGNID == 0xFCE1: SignalVal = int(Framedata[3] * 0x1000000) + int(Framedata[2] * 0x10000) + int(Framedata[1] * 0x100) + int(Framedata[0]) elif PGNID == 0xFEE5: SignalVal = int(Framedata[3] * 0x1000000) + int(Framedata[2] * 0x10000) + int(Framedata[1] * 0x100) + int(Framedata[0]) elif PGNID == 0xFEE5: SignalVal = int(Framedata[3] * 0x1000000) + int(Framedata[2] * 0x10000) + int(Framedata[1] * 0x100) + int(Framedata[0]) elif PGNID == 0xFEEE: SignalVal = int(Framedata[0] - 40) elif PGNID == 0xFE56: SignalVal = float(Framedata[0] * 0.4) elif PGNID == 0xFEF2: SignalVal = float(int(Framedata[1] * 0x100 + Framedata[0] * 0.05)) elif PGNID == 0xF005: SignalVal = Framedata[3] return SignalVal # def start_reading(self): # self.read_thread = threading.Thread(target=self.Com_read_frame, daemon=True) # self.read_thread.start() 这是serialpro文件 – coding: utf-8 – import threading Form implementation generated from reading ui file ‘CanOBD.ui’ Created by: PyQt5 UI code generator 5.15.9 WARNING: Any manual changes made to this file will be lost when pyuic5 is run again. Do not edit this file unless you know what you are doing. from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtCore import QThread, pyqtSignal,QTimer from PyQt5.QtWidgets import QApplication, QTableWidget, QTableWidgetItem,QTreeWidget, QTreeWidgetItem from SerialPro import SerialPort as SerialThread from SerialPro import CanOBDItemList,CanPGNItemList import time import serial import serial.tools.list_ports import binascii import struct class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName(“MainWindow”) MainWindow.resize(1220, 940) font = QtGui.QFont() font.setPointSize(12) MainWindow.setFont(font) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName(“centralwidget”) self.tabWidget = QtWidgets.QTabWidget(self.centralwidget) self.tabWidget.setGeometry(QtCore.QRect(0, 0, 1041, 940)) self.tabWidget.setObjectName(“tabWidget”) self.tab = QtWidgets.QWidget() self.tab.setObjectName(“tab”) self.tableWidget = QtWidgets.QTableWidget(self.tab) self.tableWidget.setGeometry(QtCore.QRect(0, 0, 1031, 940)) self.tableWidget.setObjectName(“tableWidget”) self.tableWidget.setColumnCount(5) self.tableWidget.setRowCount(150) for num in range(0,150,1): item = QtWidgets.QTableWidgetItem() self.tableWidget.setVerticalHeaderItem(num, item) item = QtWidgets.QTableWidgetItem() font = QtGui.QFont() font.setKerning(False) item.setFont(font) for line in range(0,5,1): self.tableWidget.setHorizontalHeaderItem(line, item) item = QtWidgets.QTableWidgetItem() self.tabWidget.addTab(self.tab, “”) self.tab_2 = QtWidgets.QWidget() self.tab_2.setObjectName(“CanOBD Cfg Set”) self.mSpeedTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mSpeedTreeWidget.setGeometry(QtCore.QRect(10, 0, 1031, 101)) self.mSpeedTreeWidget.setObjectName(“mSpeedTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mSpeedTreeWidget.headerItem().setFont(0, font) self.mSpeedTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mSpeedTreeWidget.headerItem().setFont(3, font) self.mRPMTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mRPMTreeWidget.setGeometry(QtCore.QRect(10, 100, 1031, 91)) self.mRPMTreeWidget.setObjectName(“mRPMTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mRPMTreeWidget.headerItem().setFont(0, font) self.mRPMTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mRPMTreeWidget.headerItem().setFont(3, font) self.mVDHRTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mVDHRTreeWidget.setGeometry(QtCore.QRect(10, 190, 1031, 91)) self.mVDHRTreeWidget.setObjectName(“mVDHRTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mVDHRTreeWidget.headerItem().setFont(0, font) self.mVDHRTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mVDHRTreeWidget.headerItem().setFont(3, font) self.mHoursTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mHoursTreeWidget.setGeometry(QtCore.QRect(10, 280, 1031, 101)) self.mHoursTreeWidget.setObjectName(“mHoursTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mHoursTreeWidget.headerItem().setFont(0, font) self.mHoursTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mHoursTreeWidget.headerItem().setFont(3, font) self.mEECTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mEECTreeWidget.setGeometry(QtCore.QRect(10, 380, 1031, 91)) self.mEECTreeWidget.setObjectName(“mEECTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mEECTreeWidget.headerItem().setFont(0, font) self.mEECTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mEECTreeWidget.headerItem().setFont(3, font) self.mET1TreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mET1TreeWidget.setGeometry(QtCore.QRect(10, 470, 1031, 101)) self.mET1TreeWidget.setObjectName(“mET1TreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mET1TreeWidget.headerItem().setFont(0, font) self.mET1TreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mET1TreeWidget.headerItem().setFont(3, font) self.mAT1T1ITreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mAT1T1ITreeWidget.setGeometry(QtCore.QRect(10, 570, 1031, 91)) self.mAT1T1ITreeWidget.setObjectName(“mAT1T1ITreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mAT1T1ITreeWidget.headerItem().setFont(0, font) self.mAT1T1ITreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mAT1T1ITreeWidget.headerItem().setFont(3, font) self.mLFETreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mLFETreeWidget.setGeometry(QtCore.QRect(10, 660, 1031, 101)) self.mLFETreeWidget.setObjectName(“mLFETreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mLFETreeWidget.headerItem().setFont(0, font) self.mLFETreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mLFETreeWidget.headerItem().setFont(3, font) self.mETC2TreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mETC2TreeWidget.setGeometry(QtCore.QRect(10, 760, 1031, 101)) self.mETC2TreeWidget.setObjectName(“mETC2TreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mETC2TreeWidget.headerItem().setFont(0, font) self.mETC2TreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mETC2TreeWidget.headerItem().setFont(3, font) self.tabWidget.addTab(self.tab_2, “”) self.mComCfgBox = QtWidgets.QGroupBox(self.centralwidget) self.mComCfgBox.setGeometry(QtCore.QRect(1040, 10, 191, 231)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mComCfgBox.setFont(font) self.mComCfgBox.setObjectName(“mComCfgBox”) self.mPortName = QtWidgets.QLabel(self.mComCfgBox) self.mPortName.setGeometry(QtCore.QRect(20, 30, 61, 21)) self.mPortName.setObjectName(“mPortName”) self.mBpsName = QtWidgets.QLabel(self.mComCfgBox) self.mBpsName.setGeometry(QtCore.QRect(20, 60, 61, 21)) self.mBpsName.setObjectName(“mBpsName”) self.mDatabitName = QtWidgets.QLabel(self.mComCfgBox) self.mDatabitName.setGeometry(QtCore.QRect(20, 90, 61, 21)) self.mDatabitName.setObjectName(“mDatabitName”) self.mStopName = QtWidgets.QLabel(self.mComCfgBox) self.mStopName.setGeometry(QtCore.QRect(20, 120, 61, 21)) self.mStopName.setObjectName(“mStopName”) self.mOddName = QtWidgets.QLabel(self.mComCfgBox) self.mOddName.setGeometry(QtCore.QRect(20, 150, 61, 21)) self.mOddName.setObjectName(“mOddName”) self.mDatabitVal = QtWidgets.QLabel(self.mComCfgBox) self.mDatabitVal.setGeometry(QtCore.QRect(100, 90, 54, 21)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mDatabitVal.setFont(font) self.mDatabitVal.setLayoutDirection(QtCore.Qt.LeftToRight) self.mDatabitVal.setAlignment(QtCore.Qt.AlignCenter) self.mDatabitVal.setObjectName(“mDatabitVal”) self.mStopBitVal = QtWidgets.QLabel(self.mComCfgBox) self.mStopBitVal.setGeometry(QtCore.QRect(100, 120, 54, 21)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mStopBitVal.setFont(font) self.mStopBitVal.setLayoutDirection(QtCore.Qt.LeftToRight) self.mStopBitVal.setAlignment(QtCore.Qt.AlignCenter) self.mStopBitVal.setObjectName(“mStopBitVal”) self.mOddVal = QtWidgets.QLabel(self.mComCfgBox) self.mOddVal.setGeometry(QtCore.QRect(100, 150, 54, 21)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mOddVal.setFont(font) self.mOddVal.setLayoutDirection(QtCore.Qt.LeftToRight) self.mOddVal.setAlignment(QtCore.Qt.AlignCenter) self.mOddVal.setObjectName(“mOddVal”) self.mPortVal = QtWidgets.QComboBox(self.mComCfgBox) self.mPortVal.setGeometry(QtCore.QRect(90, 30, 81, 22)) self.mPortVal.setObjectName(“mPortVal”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mBPSVal = QtWidgets.QComboBox(self.mComCfgBox) self.mBPSVal.setGeometry(QtCore.QRect(90, 60, 81, 22)) self.mBPSVal.setObjectName(“mBPSVal”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mOpenSerial = QtWidgets.QDialogButtonBox(self.mComCfgBox) self.mOpenSerial.setGeometry(QtCore.QRect(20, 190, 156, 31)) self.mOpenSerial.setStandardButtons(QtWidgets.QDialogButtonBox.Close|QtWidgets.QDialogButtonBox.Open) self.mOpenSerial.setObjectName(“mOpenSerial”) self.mCycleCfgBox = QtWidgets.QGroupBox(self.centralwidget) self.mCycleCfgBox.setGeometry(QtCore.QRect(1040, 260, 191, 221)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mCycleCfgBox.setFont(font) self.mCycleCfgBox.setObjectName(“mCycleCfgBox”) self.mcheck1000ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck1000ms.setGeometry(QtCore.QRect(20, 180, 141, 31)) self.mcheck1000ms.setObjectName(“mcheck1000ms”) self.mcheck500ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck500ms.setGeometry(QtCore.QRect(20, 150, 141, 31)) self.mcheck500ms.setObjectName(“mcheck500ms”) self.mcheck100ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck100ms.setGeometry(QtCore.QRect(20, 90, 141, 31)) self.mcheck100ms.setObjectName(“mcheck100ms”) self.mcheck50ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck50ms.setGeometry(QtCore.QRect(20, 60, 141, 31)) self.mcheck50ms.setObjectName(“mcheck50ms”) self.mcheck20ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck20ms.setGeometry(QtCore.QRect(20, 30, 141, 31)) self.mcheck20ms.setObjectName(“mcheck20ms”) self.mcheck200ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck200ms.setGeometry(QtCore.QRect(20, 120, 141, 31)) self.mcheck200ms.setObjectName(“mcheck200ms”) self.mEventSigBox = QtWidgets.QGroupBox(self.centralwidget) self.mEventSigBox.setGeometry(QtCore.QRect(1050, 490, 191, 151)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mEventSigBox.setFont(font) self.mEventSigBox.setObjectName(“mEventSigBox”) self.radioLeftREvent = QtWidgets.QRadioButton(self.mEventSigBox) self.radioLeftREvent.setGeometry(QtCore.QRect(10, 30, 151, 16)) self.radioLeftREvent.setObjectName(“radioLeftREvent”) self.radioKiilEvent = QtWidgets.QRadioButton(self.mEventSigBox) self.radioKiilEvent.setGeometry(QtCore.QRect(10, 90, 151, 16)) self.radioKiilEvent.setObjectName(“radioKiilEvent”) self.radioPEvent = QtWidgets.QRadioButton(self.mEventSigBox) self.radioPEvent.setGeometry(QtCore.QRect(10, 120, 151, 16)) self.radioPEvent.setObjectName(“radioPEvent”) self.radioOpenCloseEvent = QtWidgets.QRadioButton(self.mEventSigBox) self.radioOpenCloseEvent.setGeometry(QtCore.QRect(10, 60, 151, 16)) self.radioOpenCloseEvent.setObjectName(“radioOpenCloseEvent”) self.mReadOBDinfBox = QtWidgets.QGroupBox(self.centralwidget) self.mReadOBDinfBox.setGeometry(QtCore.QRect(1050, 660, 191, 171)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mReadOBDinfBox.setFont(font) self.mReadOBDinfBox.setObjectName(“mReadOBDinfBox”) self.radioVinRead = QtWidgets.QRadioButton(self.mReadOBDinfBox) self.radioVinRead.setGeometry(QtCore.QRect(10, 40, 141, 21)) self.radioVinRead.setObjectName(“radioVinRead”) self.mVinInfShow = QtWidgets.QTextBrowser(self.mReadOBDinfBox) self.mVinInfShow.setGeometry(QtCore.QRect(10, 70, 171, 91)) self.mVinInfShow.setObjectName(“mVinInfShow”) MainWindow.setCentralWidget(self.centralwidget) self.statusbar = QtWidgets.QStatusBar(MainWindow) self.statusbar.setObjectName(“statusbar”) MainWindow.setStatusBar(self.statusbar) self.retranslateUi(MainWindow) self.tabWidget.setCurrentIndex(0) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate(“MainWindow”, “MainWindow”)) for num in range(0, 150, 1): item = self.tableWidget.verticalHeaderItem(num) item.setText(_translate(“MainWindow”, str(num +1))) item = self.tableWidget.horizontalHeaderItem(0) item.setText(_translate(“MainWindow”, “时间标识”)) item = self.tableWidget.horizontalHeaderItem(1) item.setText(_translate(“MainWindow”, “帧ID”)) item = self.tableWidget.horizontalHeaderItem(2) item.setText(_translate(“MainWindow”, “帧类型”)) item = self.tableWidget.horizontalHeaderItem(3) item.setText(_translate(“MainWindow”, “长度”)) item = self.tableWidget.horizontalHeaderItem(4) item.setText(_translate(“MainWindow”, “数据 (BIT7–BIT0 大端模式)”)) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate(“MainWindow”, “Tab 1”)) self.mSpeedTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “速度[CCVS1]”)) self.mSpeedTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mSpeedTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mSpeedTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(km/h)”)) self.mSpeedTreeWidget.setColumnWidth(0, 150) self.mSpeedTreeWidget.setColumnWidth(1, 150) self.mSpeedTreeWidget.setColumnWidth(2, 550) self.mSpeedTreeWidget.setColumnWidth(3, 150) self.mRPMTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “转速[EEC1]”)) self.mRPMTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mRPMTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mRPMTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(rpm)”)) self.mRPMTreeWidget.setColumnWidth(0, 150) self.mRPMTreeWidget.setColumnWidth(1, 150) self.mRPMTreeWidget.setColumnWidth(2, 550) self.mRPMTreeWidget.setColumnWidth(3, 150) self.mVDHRTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “里程[VDHR]”)) self.mVDHRTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mVDHRTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mVDHRTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(km)”)) self.mVDHRTreeWidget.setColumnWidth(0, 150) self.mVDHRTreeWidget.setColumnWidth(1, 150) self.mVDHRTreeWidget.setColumnWidth(2, 550) self.mVDHRTreeWidget.setColumnWidth(3, 150) self.mHoursTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “工作时长[HOURS]”)) self.mHoursTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mHoursTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mHoursTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(hours)”)) self.mHoursTreeWidget.setColumnWidth(0, 150) self.mHoursTreeWidget.setColumnWidth(1, 150) self.mHoursTreeWidget.setColumnWidth(2, 550) self.mHoursTreeWidget.setColumnWidth(3, 150) self.mEECTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “发动机负载[EEC1]”)) self.mEECTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mEECTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mEECTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(%)”)) self.mEECTreeWidget.setColumnWidth(0, 150) self.mEECTreeWidget.setColumnWidth(1, 150) self.mEECTreeWidget.setColumnWidth(2, 550) self.mEECTreeWidget.setColumnWidth(3, 150) self.mET1TreeWidget.headerItem().setText(0, _translate(“MainWindow”, “冷却液温度[ET1]”)) self.mET1TreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mET1TreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mET1TreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(°)”)) self.mET1TreeWidget.setColumnWidth(0, 150) self.mET1TreeWidget.setColumnWidth(1, 150) self.mET1TreeWidget.setColumnWidth(2, 550) self.mET1TreeWidget.setColumnWidth(3, 150) self.mAT1T1ITreeWidget.headerItem().setText(0, _translate(“MainWindow”, “燃油液面[AT1T1I]”)) self.mAT1T1ITreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mAT1T1ITreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mAT1T1ITreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(%)”)) self.mAT1T1ITreeWidget.setColumnWidth(0, 150) self.mAT1T1ITreeWidget.setColumnWidth(1, 150) self.mAT1T1ITreeWidget.setColumnWidth(2, 550) self.mAT1T1ITreeWidget.setColumnWidth(3, 150) self.mLFETreeWidget.headerItem().setText(0, _translate(“MainWindow”, “平均油耗[LFE]”)) self.mLFETreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mLFETreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mLFETreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(L/h)”)) self.mLFETreeWidget.setColumnWidth(0, 150) self.mLFETreeWidget.setColumnWidth(1, 150) self.mLFETreeWidget.setColumnWidth(2, 550) self.mLFETreeWidget.setColumnWidth(3, 150) self.mETC2TreeWidget.headerItem().setText(0, _translate(“MainWindow”, “档位[ETC2]”)) self.mETC2TreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mETC2TreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mETC2TreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal”)) self.mETC2TreeWidget.setColumnWidth(0, 150) self.mETC2TreeWidget.setColumnWidth(1, 150) self.mETC2TreeWidget.setColumnWidth(2, 550) self.mETC2TreeWidget.setColumnWidth(3, 150) self.tableWidget.setColumnWidth(0, 200) self.tableWidget.setColumnWidth(1, 150) self.tableWidget.setColumnWidth(4,450) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate(“MainWindow”, “CanOBD Inf Show”)) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate(“MainWindow”, “CanOBD J1939 Show”)) self.mComCfgBox.setTitle(_translate(“MainWindow”, “串口配置”)) self.mPortName.setText(_translate(“MainWindow”, “端口号”)) self.mBpsName.setText(_translate(“MainWindow”, “波特率”)) self.mDatabitName.setText(_translate(“MainWindow”, “数据位”)) self.mStopName.setText(_translate(“MainWindow”, “停止位”)) self.mOddName.setText(_translate(“MainWindow”, “检验位”)) self.mDatabitVal.setText(_translate(“MainWindow”, “8”)) self.mStopBitVal.setText(_translate(“MainWindow”, “1”)) self.mOddVal.setText(_translate(“MainWindow”, “无”)) self.mBPSVal.setItemText(0, _translate(“MainWindow”, “9600”)) self.mBPSVal.setItemText(1, _translate(“MainWindow”, “19200”)) self.mBPSVal.setItemText(2, _translate(“MainWindow”, “115200”)) self.mBPSVal.setItemText(3, _translate(“MainWindow”, “230400”)) self.mBPSVal.setItemText(4, _translate(“MainWindow”, “256000”)) self.mBPSVal.setItemText(5, _translate(“MainWindow”, “460800”)) port_list = list(serial.tools.list_ports.comports()) if port_list.len() is not 0: for num in range(port_list.len()): self.mPortVal.setItemText(num, _translate(“MainWindow”, str(port_list[num].device))) serialport = self.mPortVal.currentText() serialbaudrate = self.mBPSVal.currentText() self.LSerial = SerialThread(serialport, serialbaudrate) self.mCycleCfgBox.setTitle(_translate(“MainWindow”, “过滤设置（周期）”)) self.mcheck1000ms.setText(_translate(“MainWindow”, “1000ms 周期”)) self.mcheck500ms.setText(_translate(“MainWindow”, “500ms 周期”)) self.mcheck100ms.setText(_translate(“MainWindow”, “100ms 周期”)) self.mcheck50ms.setText(_translate(“MainWindow”, “50ms 周期”)) self.mcheck20ms.setText(_translate(“MainWindow”, “20ms 周期”)) self.mcheck200ms.setText(_translate(“MainWindow”, “200ms 周期”)) self.mEventSigBox.setTitle(_translate(“MainWindow”, “事件信号策略”)) self.radioLeftREvent.setText(_translate(“MainWindow”, “左右转 事件”)) self.radioKiilEvent.setText(_translate(“MainWindow”, “刹车 事件”)) self.radioPEvent.setText(_translate(“MainWindow”, “档位 事件”)) self.radioOpenCloseEvent.setText(_translate(“MainWindow”, “开关门 事件”)) self.mReadOBDinfBox.setTitle(_translate(“MainWindow”, “主动读取信息”)) self.radioVinRead.setText(_translate(“MainWindow”, “VIN 信息”)) def OpenSerial(self): if self.LSerial != None: if self.LSerial.SerialIsOpen(): self.LSerial.del() port_list = list(serial.tools.list_ports.comports()) if port_list.len() != 0: serialport = self.mPortVal.currentText() serialbaudrate = self.mBPSVal.currentText() self.LSerial.init(serialport,serialbaudrate) # 开启线程 self.thread = Worker() # 创建线程对象 self.thread.update_signal.connect(self.CanOBDdatarefresh) # 连接信号和槽 self.thread.update_signal.connect(self.CanOBDSignalAnalyPro) # 连接信号和槽 # self.thread.update_signal.connect(self.LSerial.Com_read_frame) # 连接信号和槽 self.thread.start() # 启动线程 #self.LSerial.Com_read_frame() self.LSerial.start_reading() # <-- 在这里启动读取线程 def CloseSerial(self): if self.LSerial.SerialIsOpen(): self.LSerial.close() def Serialconnectslot(self): self.mOpenSerial.accepted.connect(self.OpenSerial) self.mOpenSerial.rejected.connect(self.CloseSerial) def get_checked_cycles(self): “”“返回用户勾选的所有周期值（毫秒）”“” checked_cycles = [] if self.mcheck20ms.isChecked(): checked_cycles.append(10) if self.mcheck50ms.isChecked(): checked_cycles.append(50) if self.mcheck100ms.isChecked(): checked_cycles.append(100) if self.mcheck200ms.isChecked(): checked_cycles.append(200) if self.mcheck500ms.isChecked(): checked_cycles.append(500) if self.mcheck1000ms.isChecked(): checked_cycles.append(1000) return checked_cycles def CanOBDdatarefresh(self): # # 检查数据接收是否超时（1秒阈值） # current_time = time.time() # if current_time - self.LSerial.last_data_time > 1.0: # # 清空缓冲区并跳过刷新 # global frame_buffer # frame_buffer = bytearray() # return filtered_cycles = self.get_checked_cycles() all_update_ids = self.LSerial.data_updated_ids | self.LSerial.new_added_ids for can_id in all_update_ids: # 查找该ID在列表中的位置 row_index = None for idx, item in enumerate(CanOBDItemList): if item[1] == can_id: row_index = idx break if row_index is None or row_index >= self.tableWidget.rowCount(): continue # 周期过滤检查 if can_id in self.LSerial.cycle_dict: cycle = self.LSerial.cycle_dict[can_id] skip = False for filtered_cycle in filtered_cycles: tolerance = filtered_cycle * 0.1 if abs(cycle - filtered_cycle) <= tolerance: skip = True break if skip: continue # 更新表格行 item_data = CanOBDItemList[row_index] self.tableWidget.setItem(row_index, 0, QtWidgets.QTableWidgetItem(str(item_data[0]))) self.tableWidget.setItem(row_index, 1, QtWidgets.QTableWidgetItem(str(item_data[1]))) self.tableWidget.setItem(row_index, 2, QtWidgets.QTableWidgetItem(str(item_data[2]))) self.tableWidget.setItem(row_index, 3, QtWidgets.QTableWidgetItem(str(item_data[3]))) self.tableWidget.setItem(row_index, 4, QtWidgets.QTableWidgetItem(str(item_data[4]))) # 清空标志位 self.LSerial.data_updated_ids.clear() self.LSerial.new_added_ids.clear() self.tableWidget.show() def CanOBDSignalAnalyPro(self): index = 0 bfindflag = 0 if all(not sublist for sublist in CanPGNItemList) or CanPGNItemList[0][0] == 0: if len(CanPGNItemList): CanPGNItemList.pop(0) else: for signalindex in CanPGNItemList: value = ‘’.join(c for c in signalindex[0].lower() if c in ‘0123456789abcdef’) # 判断是否需要补零（前面补） if len(value) % 2 != 0: value = ‘0’ + value # 将处理后的字符串重新赋值给 signalindex[0] signalindex[0] = value PGNCanID = bytes.fromhex(str(signalindex[0])).hex() #PGNCanID = int(signalindex[0]) #车速 if (PGNCanID == bytes.fromhex(“FEF1”).hex()): num_top_items = self.mSpeedTreeWidget.topLevelItemCount() for index in range(num_top_items ): if (self.mSpeedTreeWidget.topLevelItem(index).text(1) == str(signalindex[1])): self.mSpeedTreeWidget.topLevelItem(index).setText(0, str(signalindex[0])) self.mSpeedTreeWidget.topLevelItem(index).setText(1, str(signalindex[1])) self.mSpeedTreeWidget.topLevelItem(index).setText(2, str(signalindex[2])) self.mSpeedTreeWidget.topLevelItem(index).setText(3, str(signalindex[3])) bfindflag = 1 break #self.mSpeedTreeWidget.addTopLevelItem(speeditem) if bfindflag == 0: speeditem = QTreeWidgetItem(self.mSpeedTreeWidget) speeditem.setText(0, str(signalindex[0])) speeditem.setText(1, str(signalindex[1])) speeditem.setText(2, str(signalindex[2])) speeditem.setText(3, str(signalindex[3])) self.mSpeedTreeWidget.addTopLevelItem(speeditem) self.mSpeedTreeWidget.expandAll() self.mSpeedTreeWidget.show() class Worker(QThread): update_signal = pyqtSignal(int) # 定义一个信号，用于传递更新信息到主线程 def run(self): 模拟耗时操作 while True: time.sleep(0.5) self.update_signal.emit(1) # 发射信号，传递更新信息 这是canobd文件 这个程序在接收can数据时存在严重的丢包，1秒发送10条一样canid的数据时，也会产生50%的丢包。我用print DATA进行测试，为了简化表示，假设我发送的数据是A B C D E F G这边print显示接收到的就是 A C E G。能根据测试结果帮我找出程序的固有缺陷吗
07-17
串口接收缓冲区设置：每次读取最多4096字节，但可能由于串口数据到达不及时，导致读取次数过多，而线程又存在sleep(0.001)，可能导致数据堆积不及时。 2. 解析线程效率：状态机解析是逐个字节进行的，且每次解析一...
import sys sys.path.append(‘/UI/Login’) from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtWidgets import QApplication, QWidget #from PyQt5.QtCore import QThread, pyqtSignal,QTimer from Login import Ui_Form as Login_ui from CanOBD import Ui_MainWindow as CanOBD_ui from PyQt5.QtWidgets import QMessageBox import time #import threading class LogInViewUI(QtWidgets.QWidget,Login_ui): def int(self): super(LogInViewUI,self).int() self.setupUi(self) def connectslot(self): #self.m_loginbuttonOn.clicked.connect(self.login_button) self.mloginButton.clicked.connect(self.login_button) def login_button(self): if self.mPassWordEdit.acceptRichText() == “”: QMessageBox.warning(self, ‘警告’, ‘密码不能为空，请输入！’) return None # 1打开新窗口 CanOBDWidget.show() # 2关闭本窗口 LoginWidget.close() class CanOBDViewUI(QtWidgets.QWidget,CanOBD_ui): def int(self): super(CanOBDViewUI,self).int() self.setupUi(self) if name == “main”: app = QtWidgets.QApplication(sys.argv) #MainWidget = QtWidgets.QDockWidget() LoginWidget = QtWidgets.QWidget() CanOBDWidget = QtWidgets.QMainWindow() loginui = LogInViewUI() CanOBDui = CanOBDViewUI() loginui.setupUi(LoginWidget) loginui.connectslot() CanOBDui.setupUi(CanOBDWidget) CanOBDui.Serialconnectslot() LoginWidget.show() sys.exit(app.exec_()) 这是main文件 import serial import time import struct import queue import threading from datetime import datetime CanOBDItemList = [[0,0,0,0,0]] CanPGNItemList = [[0,0,0,0]] Frame_start = b’\xFF’ Frame_end = b’\x55’ Frame_data_style_len = 6 Frame_Data_Len = 0 frame_buffer = bytearray() class CanInfShow_Item: def int(self,CanID,CanFramType,Len,CanDataInf): self.SystemCycle = datetime.strftime(“%Y-%m-%d %H:%M:%S.%f”)[:-3], self.CanID = CanID, self.CanFrame = CanFramType, self.CanDataLen = Len, self.CanData = CanDataInf class CanPGNShow_Item: def int(self, PGNID, CanID, CanData, Signal): self.PGNID = PGNID, self.CanID = CanID, self.CanData = CanData, self.Signal = Signal class SerialPort: def init(self, port, baudrate): 初始化串口参数 self.port = port self.baudrate = baudrate self.ser = serial.Serial( port=self.port, baudrate=self.baudrate, bytesize=serial.EIGHTBITS, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE ) 等待串口连接稳定 self.last_data_time = time.time() # 新增：最后接收数据的时间戳 self.cycle_dict = {} # 存储{帧ID: [上次时间戳, 当前周期]} self.last_frame_time = {} # 存储每个ID的最后出现时间 self.data_updated_ids = set() # 存储数据变化的CAN ID self.new_added_ids = set() # 存储新增的CAN ID self.state = 0 self.current_frame = bytearray() self.expected_length = 0 self.raw_data_queue = queue.Queue(maxsize=10000) self.data_lock = threading.Lock() self.worker_threads = [] time.sleep(0.2) if not self.ser.isOpen(): print(“串口打开失败！”) def close(self): # 关闭串口连接 if self.ser.isOpen(): self.ser.close() def send(self, data): # 发送数据 if self.ser.isOpen(): try: self.ser.write(data.encode(‘utf-8’)) except serial.SerialException as e: print(f"发送数据失败: {e}“) # def recv(self): # # 接收数据 # if self.ser.isOpen(): # data = self.ser.read(self.ser.inWaiting()) # if data: # 有数据时更新时间戳 # self.last_data_time = time.time() # return data def recv(self, chunk_size=4096): if self.ser.isOpen(): # 每次最多读取1024字节 data = self.ser.read(min(self.ser.inWaiting(), chunk_size)) if data: self.last_data_time = time.time() return data return None def del(self): self.close() def SerialIsOpen(self): if self.ser.isOpen(): return 1 else: return 0 def start_reading(self): self.recv_thread = threading.Thread(target=self._recv_worker, daemon=True) self.parse_thread = threading.Thread(target=self._parse_worker, daemon=True) self.recv_thread.start() self.parse_thread.start() self.worker_threads = [self.recv_thread, self.parse_thread] def _recv_worker(self): while self.ser.isOpen(): data = self.recv(chunk_size=4096) # 每次最多读4KB if data: self.raw_data_queue.put(data) else: time.sleep(0.001) def _parse_worker(self): while True: try: data = self.raw_data_queue.get(timeout=0.1) for byte in data: self.process_byte(byte) except queue.Empty: continue def process_byte(self, byte): “”” 使用状态机逐字节解析帧结构。 “”" if self.state == 0: # 等待帧头 FF if byte == 0xFF: self.current_frame.append(byte) self.state = 1 else: # 如果不是帧头，忽略该字节 pass elif self.state == 1: # 等待帧头 55 if byte == 0x55: self.current_frame.append(byte) self.state = 2 else: # 如果第二字节不是55，重置 self.reset_state() elif self.state == 2: # 接收总长度高位 (第2字节) self.current_frame.append(byte) self.state = 3 elif self.state == 3: # 接收总长度低位 (第3字节) self.current_frame.append(byte) # 计算总长度（从第2字节开始） length_high = self.current_frame[2] length_low = byte self.expected_length = (length_high << 8) | length_low self.state = 4 elif self.state == 4: # 接收类型字段 (第4字节) self.current_frame.append(byte) self.state = 5 elif self.state == 5: # 接收保留字段 (第5字节) self.current_frame.append(byte) self.state = 6 elif self.state == 6: # 接收 CAN 通道类型 (第6字节) self.current_frame.append(byte) self.state = 7 elif self.state == 7: # 接收 CAN 报文个数 N (第7字节) self.current_frame.append(byte) self.num_messages = byte self.state = 8 self.messages_received = 0 elif self.state == 8: # 接收 CAN 报文数据 (每条12字节) self.current_frame.append(byte) self.messages_received += 1 if self.messages_received >= self.num_messages * 12: # 所有报文接收完成，准备校验位 self.state = 9 elif self.state == 9: # 接收校验位 self.current_frame.append(byte) self.state = 10 elif self.state == 10: # 完整帧已接收，验证校验和 if self.verify_checksum(): # 直接处理帧数据（关键修改点） self.Frame_analoy_process(bytes(self.current_frame)) else: print(“校验失败，丢弃当前帧”) self.reset_state() def verify_checksum(self): “”" 验证校验和：从第2字节到倒数第二个字节之和 & 0xFF “”" data_to_check = self.current_frame[2:-1] # 从第2字节到最后一个校验位之前 checksum = sum(data_to_check) & 0xFF return checksum == self.current_frame[-1] def reset_state(self): “”" 重置状态机 “”" self.state = 0 self.current_frame = bytearray() self.expected_length = 0 self.messages_received = 0 #报文解析 def Frame_analoy_process(self, Framedata): # 检查帧类型 (0x0C 0x98) if len(Framedata) < 8 or Framedata[4] != 0x0C or Framedata[5] != 0x98: return try: FrameNum = int(Framedata[7]) except IndexError: return # 检查是否有足够数据 if len(Framedata) < 12 * FrameNum + 8: return current_time = time.time() # 获取当前精确时间戳 for index in range(0,FrameNum): # 时间戳 Cantime = datetime.now().strftime(“%Y-%m-%d %H:%M:%S.%f”)[:-3] try: id_bytes = [ Framedata[12 * index + 11], # LSB Framedata[12 * index + 10], Framedata[12 * index + 9], Framedata[12 * index + 8] # MSB ] except IndexError: continue # 格式化为8位大写十六进制 CanID = ‘’.join(format(b, ‘02X’) for b in id_bytes) # 提取ID字节 CanFramType = “Cycle” Len = 8 CanDataSpace = ‘’ PGNdata = ‘’ PGNID = int(Framedata[12 * index + 9] ) + int(Framedata[12 * index + 10]* 0x100) PGNSignl = self.Frame_analoy_PGN_Signal(PGNID,Framedata[12 * index + 12:]) # 提取数据部分 for posindex in range(0,8): PGNdata += str(hex(Framedata[12 * index + 12 + posindex])[2:]) try: CanDataSpace = ’ '.join( format(Framedata[12 * index + 12 + posindex], ‘02X’) for posindex in range(8) ) except IndexError: continue CanItemData = [Cantime, CanID, CanFramType, Len, CanDataSpace] if PGNSignl != None: SignalItemData = [hex(PGNID)[2:], CanID, PGNdata, PGNSignl] if all(not sublist for sublist in CanPGNItemList) or CanPGNItemList[0][0] == 0: if len(CanPGNItemList): CanPGNItemList.pop(0) CanPGNItemList.insert(0, SignalItemData) else: Listpos = self.find_in_2d_list(CanPGNItemList, CanID) if None != Listpos: CanPGNItemList[Listpos[0]] = SignalItemData else: CanPGNItemList.append(SignalItemData) if CanID in self.last_frame_time: last_time = self.last_frame_time[CanID] cycle = (current_time - last_time) * 1000 # 转换为毫秒 # 平滑处理：使用加权平均减少抖动 if CanID in self.cycle_dict: old_cycle = self.cycle_dict[CanID] self.cycle_dict[CanID] = 0.7 * old_cycle + 0.3 * cycle else: self.cycle_dict[CanID] = cycle else: self.cycle_dict[CanID] = 0 # 首次出现，周期设为0 self.last_frame_time[CanID] = current_time # 更新列表 if not CanOBDItemList or CanOBDItemList[0][0] == 0: if CanOBDItemList and CanOBDItemList[0][0] == 0: CanOBDItemList.pop(0) CanOBDItemList.insert(0, CanItemData) self.new_added_ids.add(CanID) # 新增标志 else: Listpos = self.find_in_2d_list(CanOBDItemList, CanID) if Listpos is not None: CanOBDItemList[Listpos[0]] = CanItemData self.data_updated_ids.add(CanID) # 更新标志 else: CanOBDItemList.append(CanItemData) self.new_added_ids.add(CanID) # 新增标志 self.last_data_time = time.time() # 解析到有效帧时更新时间 if “18F0090B” in self.cycle_dict: print( self.cycle_dict[“18F0090B”]) def find_in_2d_list(self,matrix, target): for i, row in enumerate(matrix): if any(x == target for x in row): return (i, row.index(target)) # 使用row.index()找到具体列的索引 return None def Frame_analoy_PGN_Signal(self,PGNID, Framedata): #车速 SignalVal = 0 if PGNID == 0xFEF1: SignalVal = float(int(Framedata[2] * 0x100) + int(Framedata[3]) / 256.0) elif PGNID == 0xF004: SignalVal = str(int(Framedata[2] & 0x7F)) + ‘|’+ str(float(int(Framedata[4] * 0x100) + int(Framedata[3]) / 125.0)) elif PGNID == 0xFCE1: SignalVal = int(Framedata[3] * 0x1000000) + int(Framedata[2] * 0x10000) + int(Framedata[1] * 0x100) + int(Framedata[0]) elif PGNID == 0xFEE5: SignalVal = int(Framedata[3] * 0x1000000) + int(Framedata[2] * 0x10000) + int(Framedata[1] * 0x100) + int(Framedata[0]) elif PGNID == 0xFEE5: SignalVal = int(Framedata[3] * 0x1000000) + int(Framedata[2] * 0x10000) + int(Framedata[1] * 0x100) + int(Framedata[0]) elif PGNID == 0xFEEE: SignalVal = int(Framedata[0] - 40) elif PGNID == 0xFE56: SignalVal = float(Framedata[0] * 0.4) elif PGNID == 0xFEF2: SignalVal = float(int(Framedata[1] * 0x100 + Framedata[0] * 0.05)) elif PGNID == 0xF005: SignalVal = Framedata[3] return SignalVal # def start_reading(self): # self.read_thread = threading.Thread(target=self.Com_read_frame, daemon=True) # self.read_thread.start() 这是serialpro文件 – coding: utf-8 – import threading Form implementation generated from reading ui file ‘CanOBD.ui’ Created by: PyQt5 UI code generator 5.15.9 WARNING: Any manual changes made to this file will be lost when pyuic5 is run again. Do not edit this file unless you know what you are doing. from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtCore import QThread, pyqtSignal,QTimer from PyQt5.QtWidgets import QApplication, QTableWidget, QTableWidgetItem,QTreeWidget, QTreeWidgetItem from SerialPro import SerialPort as SerialThread from SerialPro import CanOBDItemList,CanPGNItemList import time import serial import serial.tools.list_ports import binascii import struct class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName(“MainWindow”) MainWindow.resize(1220, 940) font = QtGui.QFont() font.setPointSize(12) MainWindow.setFont(font) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName(“centralwidget”) self.tabWidget = QtWidgets.QTabWidget(self.centralwidget) self.tabWidget.setGeometry(QtCore.QRect(0, 0, 1041, 940)) self.tabWidget.setObjectName(“tabWidget”) self.tab = QtWidgets.QWidget() self.tab.setObjectName(“tab”) self.tableWidget = QtWidgets.QTableWidget(self.tab) self.tableWidget.setGeometry(QtCore.QRect(0, 0, 1031, 940)) self.tableWidget.setObjectName(“tableWidget”) self.tableWidget.setColumnCount(5) self.tableWidget.setRowCount(150) for num in range(0,150,1): item = QtWidgets.QTableWidgetItem() self.tableWidget.setVerticalHeaderItem(num, item) item = QtWidgets.QTableWidgetItem() font = QtGui.QFont() font.setKerning(False) item.setFont(font) for line in range(0,5,1): self.tableWidget.setHorizontalHeaderItem(line, item) item = QtWidgets.QTableWidgetItem() self.tabWidget.addTab(self.tab, “”) self.tab_2 = QtWidgets.QWidget() self.tab_2.setObjectName(“CanOBD Cfg Set”) self.mSpeedTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mSpeedTreeWidget.setGeometry(QtCore.QRect(10, 0, 1031, 101)) self.mSpeedTreeWidget.setObjectName(“mSpeedTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mSpeedTreeWidget.headerItem().setFont(0, font) self.mSpeedTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mSpeedTreeWidget.headerItem().setFont(3, font) self.mRPMTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mRPMTreeWidget.setGeometry(QtCore.QRect(10, 100, 1031, 91)) self.mRPMTreeWidget.setObjectName(“mRPMTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mRPMTreeWidget.headerItem().setFont(0, font) self.mRPMTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mRPMTreeWidget.headerItem().setFont(3, font) self.mVDHRTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mVDHRTreeWidget.setGeometry(QtCore.QRect(10, 190, 1031, 91)) self.mVDHRTreeWidget.setObjectName(“mVDHRTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mVDHRTreeWidget.headerItem().setFont(0, font) self.mVDHRTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mVDHRTreeWidget.headerItem().setFont(3, font) self.mHoursTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mHoursTreeWidget.setGeometry(QtCore.QRect(10, 280, 1031, 101)) self.mHoursTreeWidget.setObjectName(“mHoursTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mHoursTreeWidget.headerItem().setFont(0, font) self.mHoursTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mHoursTreeWidget.headerItem().setFont(3, font) self.mEECTreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mEECTreeWidget.setGeometry(QtCore.QRect(10, 380, 1031, 91)) self.mEECTreeWidget.setObjectName(“mEECTreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mEECTreeWidget.headerItem().setFont(0, font) self.mEECTreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mEECTreeWidget.headerItem().setFont(3, font) self.mET1TreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mET1TreeWidget.setGeometry(QtCore.QRect(10, 470, 1031, 101)) self.mET1TreeWidget.setObjectName(“mET1TreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mET1TreeWidget.headerItem().setFont(0, font) self.mET1TreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mET1TreeWidget.headerItem().setFont(3, font) self.mAT1T1ITreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mAT1T1ITreeWidget.setGeometry(QtCore.QRect(10, 570, 1031, 91)) self.mAT1T1ITreeWidget.setObjectName(“mAT1T1ITreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mAT1T1ITreeWidget.headerItem().setFont(0, font) self.mAT1T1ITreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mAT1T1ITreeWidget.headerItem().setFont(3, font) self.mLFETreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mLFETreeWidget.setGeometry(QtCore.QRect(10, 660, 1031, 101)) self.mLFETreeWidget.setObjectName(“mLFETreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mLFETreeWidget.headerItem().setFont(0, font) self.mLFETreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mLFETreeWidget.headerItem().setFont(3, font) self.mETC2TreeWidget = QtWidgets.QTreeWidget(self.tab_2) self.mETC2TreeWidget.setGeometry(QtCore.QRect(10, 760, 1031, 101)) self.mETC2TreeWidget.setObjectName(“mETC2TreeWidget”) font = QtGui.QFont() font.setPointSize(12) self.mETC2TreeWidget.headerItem().setFont(0, font) self.mETC2TreeWidget.headerItem().setTextAlignment(1, QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter) font = QtGui.QFont() font.setKerning(True) self.mETC2TreeWidget.headerItem().setFont(3, font) self.tabWidget.addTab(self.tab_2, “”) self.mComCfgBox = QtWidgets.QGroupBox(self.centralwidget) self.mComCfgBox.setGeometry(QtCore.QRect(1040, 10, 191, 231)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mComCfgBox.setFont(font) self.mComCfgBox.setObjectName(“mComCfgBox”) self.mPortName = QtWidgets.QLabel(self.mComCfgBox) self.mPortName.setGeometry(QtCore.QRect(20, 30, 61, 21)) self.mPortName.setObjectName(“mPortName”) self.mBpsName = QtWidgets.QLabel(self.mComCfgBox) self.mBpsName.setGeometry(QtCore.QRect(20, 60, 61, 21)) self.mBpsName.setObjectName(“mBpsName”) self.mDatabitName = QtWidgets.QLabel(self.mComCfgBox) self.mDatabitName.setGeometry(QtCore.QRect(20, 90, 61, 21)) self.mDatabitName.setObjectName(“mDatabitName”) self.mStopName = QtWidgets.QLabel(self.mComCfgBox) self.mStopName.setGeometry(QtCore.QRect(20, 120, 61, 21)) self.mStopName.setObjectName(“mStopName”) self.mOddName = QtWidgets.QLabel(self.mComCfgBox) self.mOddName.setGeometry(QtCore.QRect(20, 150, 61, 21)) self.mOddName.setObjectName(“mOddName”) self.mDatabitVal = QtWidgets.QLabel(self.mComCfgBox) self.mDatabitVal.setGeometry(QtCore.QRect(100, 90, 54, 21)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mDatabitVal.setFont(font) self.mDatabitVal.setLayoutDirection(QtCore.Qt.LeftToRight) self.mDatabitVal.setAlignment(QtCore.Qt.AlignCenter) self.mDatabitVal.setObjectName(“mDatabitVal”) self.mStopBitVal = QtWidgets.QLabel(self.mComCfgBox) self.mStopBitVal.setGeometry(QtCore.QRect(100, 120, 54, 21)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mStopBitVal.setFont(font) self.mStopBitVal.setLayoutDirection(QtCore.Qt.LeftToRight) self.mStopBitVal.setAlignment(QtCore.Qt.AlignCenter) self.mStopBitVal.setObjectName(“mStopBitVal”) self.mOddVal = QtWidgets.QLabel(self.mComCfgBox) self.mOddVal.setGeometry(QtCore.QRect(100, 150, 54, 21)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mOddVal.setFont(font) self.mOddVal.setLayoutDirection(QtCore.Qt.LeftToRight) self.mOddVal.setAlignment(QtCore.Qt.AlignCenter) self.mOddVal.setObjectName(“mOddVal”) self.mPortVal = QtWidgets.QComboBox(self.mComCfgBox) self.mPortVal.setGeometry(QtCore.QRect(90, 30, 81, 22)) self.mPortVal.setObjectName(“mPortVal”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mPortVal.addItem(“”) self.mBPSVal = QtWidgets.QComboBox(self.mComCfgBox) self.mBPSVal.setGeometry(QtCore.QRect(90, 60, 81, 22)) self.mBPSVal.setObjectName(“mBPSVal”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mBPSVal.addItem(“”) self.mOpenSerial = QtWidgets.QDialogButtonBox(self.mComCfgBox) self.mOpenSerial.setGeometry(QtCore.QRect(20, 190, 156, 31)) self.mOpenSerial.setStandardButtons(QtWidgets.QDialogButtonBox.Close|QtWidgets.QDialogButtonBox.Open) self.mOpenSerial.setObjectName(“mOpenSerial”) self.mCycleCfgBox = QtWidgets.QGroupBox(self.centralwidget) self.mCycleCfgBox.setGeometry(QtCore.QRect(1040, 260, 191, 221)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mCycleCfgBox.setFont(font) self.mCycleCfgBox.setObjectName(“mCycleCfgBox”) self.mcheck1000ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck1000ms.setGeometry(QtCore.QRect(20, 180, 141, 31)) self.mcheck1000ms.setObjectName(“mcheck1000ms”) self.mcheck500ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck500ms.setGeometry(QtCore.QRect(20, 150, 141, 31)) self.mcheck500ms.setObjectName(“mcheck500ms”) self.mcheck100ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck100ms.setGeometry(QtCore.QRect(20, 90, 141, 31)) self.mcheck100ms.setObjectName(“mcheck100ms”) self.mcheck50ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck50ms.setGeometry(QtCore.QRect(20, 60, 141, 31)) self.mcheck50ms.setObjectName(“mcheck50ms”) self.mcheck20ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck20ms.setGeometry(QtCore.QRect(20, 30, 141, 31)) self.mcheck20ms.setObjectName(“mcheck20ms”) self.mcheck200ms = QtWidgets.QCheckBox(self.mCycleCfgBox) self.mcheck200ms.setGeometry(QtCore.QRect(20, 120, 141, 31)) self.mcheck200ms.setObjectName(“mcheck200ms”) self.mEventSigBox = QtWidgets.QGroupBox(self.centralwidget) self.mEventSigBox.setGeometry(QtCore.QRect(1050, 490, 191, 151)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mEventSigBox.setFont(font) self.mEventSigBox.setObjectName(“mEventSigBox”) self.radioLeftREvent = QtWidgets.QRadioButton(self.mEventSigBox) self.radioLeftREvent.setGeometry(QtCore.QRect(10, 30, 151, 16)) self.radioLeftREvent.setObjectName(“radioLeftREvent”) self.radioKiilEvent = QtWidgets.QRadioButton(self.mEventSigBox) self.radioKiilEvent.setGeometry(QtCore.QRect(10, 90, 151, 16)) self.radioKiilEvent.setObjectName(“radioKiilEvent”) self.radioPEvent = QtWidgets.QRadioButton(self.mEventSigBox) self.radioPEvent.setGeometry(QtCore.QRect(10, 120, 151, 16)) self.radioPEvent.setObjectName(“radioPEvent”) self.radioOpenCloseEvent = QtWidgets.QRadioButton(self.mEventSigBox) self.radioOpenCloseEvent.setGeometry(QtCore.QRect(10, 60, 151, 16)) self.radioOpenCloseEvent.setObjectName(“radioOpenCloseEvent”) self.mReadOBDinfBox = QtWidgets.QGroupBox(self.centralwidget) self.mReadOBDinfBox.setGeometry(QtCore.QRect(1050, 660, 191, 171)) font = QtGui.QFont() font.setPointSize(14) font.setBold(True) font.setWeight(75) self.mReadOBDinfBox.setFont(font) self.mReadOBDinfBox.setObjectName(“mReadOBDinfBox”) self.radioVinRead = QtWidgets.QRadioButton(self.mReadOBDinfBox) self.radioVinRead.setGeometry(QtCore.QRect(10, 40, 141, 21)) self.radioVinRead.setObjectName(“radioVinRead”) self.mVinInfShow = QtWidgets.QTextBrowser(self.mReadOBDinfBox) self.mVinInfShow.setGeometry(QtCore.QRect(10, 70, 171, 91)) self.mVinInfShow.setObjectName(“mVinInfShow”) MainWindow.setCentralWidget(self.centralwidget) self.statusbar = QtWidgets.QStatusBar(MainWindow) self.statusbar.setObjectName(“statusbar”) MainWindow.setStatusBar(self.statusbar) self.retranslateUi(MainWindow) self.tabWidget.setCurrentIndex(0) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate(“MainWindow”, “MainWindow”)) for num in range(0, 150, 1): item = self.tableWidget.verticalHeaderItem(num) item.setText(_translate(“MainWindow”, str(num +1))) item = self.tableWidget.horizontalHeaderItem(0) item.setText(_translate(“MainWindow”, “时间标识”)) item = self.tableWidget.horizontalHeaderItem(1) item.setText(_translate(“MainWindow”, “帧ID”)) item = self.tableWidget.horizontalHeaderItem(2) item.setText(_translate(“MainWindow”, “帧类型”)) item = self.tableWidget.horizontalHeaderItem(3) item.setText(_translate(“MainWindow”, “长度”)) item = self.tableWidget.horizontalHeaderItem(4) item.setText(_translate(“MainWindow”, “数据 (BIT7–BIT0 大端模式)”)) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate(“MainWindow”, “Tab 1”)) self.mSpeedTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “速度[CCVS1]”)) self.mSpeedTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mSpeedTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mSpeedTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(km/h)”)) self.mSpeedTreeWidget.setColumnWidth(0, 150) self.mSpeedTreeWidget.setColumnWidth(1, 150) self.mSpeedTreeWidget.setColumnWidth(2, 550) self.mSpeedTreeWidget.setColumnWidth(3, 150) self.mRPMTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “转速[EEC1]”)) self.mRPMTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mRPMTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mRPMTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(rpm)”)) self.mRPMTreeWidget.setColumnWidth(0, 150) self.mRPMTreeWidget.setColumnWidth(1, 150) self.mRPMTreeWidget.setColumnWidth(2, 550) self.mRPMTreeWidget.setColumnWidth(3, 150) self.mVDHRTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “里程[VDHR]”)) self.mVDHRTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mVDHRTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mVDHRTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(km)”)) self.mVDHRTreeWidget.setColumnWidth(0, 150) self.mVDHRTreeWidget.setColumnWidth(1, 150) self.mVDHRTreeWidget.setColumnWidth(2, 550) self.mVDHRTreeWidget.setColumnWidth(3, 150) self.mHoursTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “工作时长[HOURS]”)) self.mHoursTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mHoursTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mHoursTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(hours)”)) self.mHoursTreeWidget.setColumnWidth(0, 150) self.mHoursTreeWidget.setColumnWidth(1, 150) self.mHoursTreeWidget.setColumnWidth(2, 550) self.mHoursTreeWidget.setColumnWidth(3, 150) self.mEECTreeWidget.headerItem().setText(0, _translate(“MainWindow”, “发动机负载[EEC1]”)) self.mEECTreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mEECTreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mEECTreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(%)”)) self.mEECTreeWidget.setColumnWidth(0, 150) self.mEECTreeWidget.setColumnWidth(1, 150) self.mEECTreeWidget.setColumnWidth(2, 550) self.mEECTreeWidget.setColumnWidth(3, 150) self.mET1TreeWidget.headerItem().setText(0, _translate(“MainWindow”, “冷却液温度[ET1]”)) self.mET1TreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mET1TreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mET1TreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(°)”)) self.mET1TreeWidget.setColumnWidth(0, 150) self.mET1TreeWidget.setColumnWidth(1, 150) self.mET1TreeWidget.setColumnWidth(2, 550) self.mET1TreeWidget.setColumnWidth(3, 150) self.mAT1T1ITreeWidget.headerItem().setText(0, _translate(“MainWindow”, “燃油液面[AT1T1I]”)) self.mAT1T1ITreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mAT1T1ITreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mAT1T1ITreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(%)”)) self.mAT1T1ITreeWidget.setColumnWidth(0, 150) self.mAT1T1ITreeWidget.setColumnWidth(1, 150) self.mAT1T1ITreeWidget.setColumnWidth(2, 550) self.mAT1T1ITreeWidget.setColumnWidth(3, 150) self.mLFETreeWidget.headerItem().setText(0, _translate(“MainWindow”, “平均油耗[LFE]”)) self.mLFETreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mLFETreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mLFETreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal(L/h)”)) self.mLFETreeWidget.setColumnWidth(0, 150) self.mLFETreeWidget.setColumnWidth(1, 150) self.mLFETreeWidget.setColumnWidth(2, 550) self.mLFETreeWidget.setColumnWidth(3, 150) self.mETC2TreeWidget.headerItem().setText(0, _translate(“MainWindow”, “档位[ETC2]”)) self.mETC2TreeWidget.headerItem().setText(1, _translate(“MainWindow”, “CanID”)) self.mETC2TreeWidget.headerItem().setText(2, _translate(“MainWindow”, “Data”)) self.mETC2TreeWidget.headerItem().setText(3, _translate(“MainWindow”, “Signal”)) self.mETC2TreeWidget.setColumnWidth(0, 150) self.mETC2TreeWidget.setColumnWidth(1, 150) self.mETC2TreeWidget.setColumnWidth(2, 550) self.mETC2TreeWidget.setColumnWidth(3, 150) self.tableWidget.setColumnWidth(0, 200) self.tableWidget.setColumnWidth(1, 150) self.tableWidget.setColumnWidth(4,450) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate(“MainWindow”, “CanOBD Inf Show”)) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate(“MainWindow”, “CanOBD J1939 Show”)) self.mComCfgBox.setTitle(_translate(“MainWindow”, “串口配置”)) self.mPortName.setText(_translate(“MainWindow”, “端口号”)) self.mBpsName.setText(_translate(“MainWindow”, “波特率”)) self.mDatabitName.setText(_translate(“MainWindow”, “数据位”)) self.mStopName.setText(_translate(“MainWindow”, “停止位”)) self.mOddName.setText(_translate(“MainWindow”, “检验位”)) self.mDatabitVal.setText(_translate(“MainWindow”, “8”)) self.mStopBitVal.setText(_translate(“MainWindow”, “1”)) self.mOddVal.setText(_translate(“MainWindow”, “无”)) self.mBPSVal.setItemText(0, _translate(“MainWindow”, “9600”)) self.mBPSVal.setItemText(1, _translate(“MainWindow”, “19200”)) self.mBPSVal.setItemText(2, _translate(“MainWindow”, “115200”)) self.mBPSVal.setItemText(3, _translate(“MainWindow”, “230400”)) self.mBPSVal.setItemText(4, _translate(“MainWindow”, “256000”)) self.mBPSVal.setItemText(5, _translate(“MainWindow”, “460800”)) 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self.radioPEvent.setText(_translate(“MainWindow”, “档位 事件”)) self.radioOpenCloseEvent.setText(_translate(“MainWindow”, “开关门 事件”)) self.mReadOBDinfBox.setTitle(_translate(“MainWindow”, “主动读取信息”)) self.radioVinRead.setText(_translate(“MainWindow”, “VIN 信息”)) def OpenSerial(self): if self.LSerial != None: if self.LSerial.SerialIsOpen(): self.LSerial.del() port_list = list(serial.tools.list_ports.comports()) if port_list.len() != 0: serialport = self.mPortVal.currentText() serialbaudrate = self.mBPSVal.currentText() self.LSerial.init(serialport,serialbaudrate) # 开启线程 self.thread = Worker() # 创建线程对象 self.thread.update_signal.connect(self.CanOBDdatarefresh) # 连接信号和槽 self.thread.update_signal.connect(self.CanOBDSignalAnalyPro) # 连接信号和槽 # self.thread.update_signal.connect(self.LSerial.Com_read_frame) # 连接信号和槽 self.thread.start() # 启动线程 #self.LSerial.Com_read_frame() self.LSerial.start_reading() # <-- 在这里启动读取线程 def CloseSerial(self): if self.LSerial.SerialIsOpen(): self.LSerial.close() def Serialconnectslot(self): self.mOpenSerial.accepted.connect(self.OpenSerial) self.mOpenSerial.rejected.connect(self.CloseSerial) def get_checked_cycles(self): “”“返回用户勾选的所有周期值（毫秒）”“” checked_cycles = [] if self.mcheck20ms.isChecked(): checked_cycles.append(10) if self.mcheck50ms.isChecked(): checked_cycles.append(50) if self.mcheck100ms.isChecked(): checked_cycles.append(100) if self.mcheck200ms.isChecked(): checked_cycles.append(200) if self.mcheck500ms.isChecked(): checked_cycles.append(500) if self.mcheck1000ms.isChecked(): checked_cycles.append(1000) return checked_cycles def CanOBDdatarefresh(self): # # 检查数据接收是否超时（1秒阈值） # current_time = time.time() # if current_time - self.LSerial.last_data_time > 1.0: # # 清空缓冲区并跳过刷新 # global frame_buffer # frame_buffer = bytearray() # return filtered_cycles = self.get_checked_cycles() all_update_ids = self.LSerial.data_updated_ids | self.LSerial.new_added_ids for can_id in all_update_ids: # 查找该ID在列表中的位置 row_index = None for idx, item in enumerate(CanOBDItemList): if item[1] == can_id: row_index = idx break if row_index is None or row_index >= self.tableWidget.rowCount(): continue # 周期过滤检查 if can_id in self.LSerial.cycle_dict: cycle = self.LSerial.cycle_dict[can_id] skip = False for filtered_cycle in filtered_cycles: tolerance = filtered_cycle * 0.1 if abs(cycle - filtered_cycle) <= tolerance: skip = True break if skip: continue # 更新表格行 item_data = CanOBDItemList[row_index] self.tableWidget.setItem(row_index, 0, QtWidgets.QTableWidgetItem(str(item_data[0]))) self.tableWidget.setItem(row_index, 1, QtWidgets.QTableWidgetItem(str(item_data[1]))) self.tableWidget.setItem(row_index, 2, QtWidgets.QTableWidgetItem(str(item_data[2]))) self.tableWidget.setItem(row_index, 3, QtWidgets.QTableWidgetItem(str(item_data[3]))) self.tableWidget.setItem(row_index, 4, QtWidgets.QTableWidgetItem(str(item_data[4]))) # 清空标志位 self.LSerial.data_updated_ids.clear() self.LSerial.new_added_ids.clear() self.tableWidget.show() def CanOBDSignalAnalyPro(self): index = 0 bfindflag = 0 if all(not sublist for sublist in CanPGNItemList) or CanPGNItemList[0][0] == 0: if len(CanPGNItemList): CanPGNItemList.pop(0) else: for signalindex in CanPGNItemList: value = ‘’.join(c for c in signalindex[0].lower() if c in ‘0123456789abcdef’) # 判断是否需要补零（前面补） if len(value) % 2 != 0: value = ‘0’ + value # 将处理后的字符串重新赋值给 signalindex[0] signalindex[0] = value PGNCanID = bytes.fromhex(str(signalindex[0])).hex() #PGNCanID = int(signalindex[0]) #车速 if (PGNCanID == bytes.fromhex(“FEF1”).hex()): num_top_items = self.mSpeedTreeWidget.topLevelItemCount() for index in range(num_top_items ): if (self.mSpeedTreeWidget.topLevelItem(index).text(1) == str(signalindex[1])): self.mSpeedTreeWidget.topLevelItem(index).setText(0, str(signalindex[0])) self.mSpeedTreeWidget.topLevelItem(index).setText(1, str(signalindex[1])) self.mSpeedTreeWidget.topLevelItem(index).setText(2, str(signalindex[2])) self.mSpeedTreeWidget.topLevelItem(index).setText(3, str(signalindex[3])) bfindflag = 1 break #self.mSpeedTreeWidget.addTopLevelItem(speeditem) if bfindflag == 0: speeditem = QTreeWidgetItem(self.mSpeedTreeWidget) speeditem.setText(0, str(signalindex[0])) speeditem.setText(1, str(signalindex[1])) speeditem.setText(2, str(signalindex[2])) speeditem.setText(3, str(signalindex[3])) self.mSpeedTreeWidget.addTopLevelItem(speeditem) self.mSpeedTreeWidget.expandAll() self.mSpeedTreeWidget.show() class Worker(QThread): update_signal = pyqtSignal(int) # 定义一个信号，用于传递更新信息到主线程 def run(self): 模拟耗时操作 while True: time.sleep(0.5) self.update_signal.emit(1) # 发射信号，传递更新信息 这是canobd文件 这段程序在接收can数据时，存在比较严重的丢包现象。请你注意，我哪怕只发送单一canid的数据，周期100ms，它也会有50%的丢包率。大量发送（1200条can数据每秒）时，大概会有33%的丢包率，能帮我分析程序在接收方面的原因吗？如果你觉得程序不会导致这么严重的丢包率，也可以回答是发送设备的问题
07-16
注意：在`_recv_worker`中，如果没有数据，会休眠0.001秒（1毫秒）。但在有数据时，会连续读取直到没有数据。在低速情况下，这没有问题。但是，如果串口设备发送数据不连续（比如每100ms发送一条），那么每次读取...
**** Build of configuration Debug for project QT **** "C:\\ti\\ccsv6\\utils\\bin\\gmake" -k all 'Building file: ../SRC/QT.c' 'Invoking: C2000 Compiler' "C:/ti/ccsv6/tools/compiler/ti-cgt-c2000_15.12.1.LTS/bin/cl2000" -v28 -ml -mt --float_support=fpu32 --include_path="C:/ti/ccsv6/tools/compiler/ti-cgt-c2000_15.12.1.LTS/include" --include_path="E:/CCS6.1.3/test/QT/INCLUDE" --include_path="E:/CCS6.1.3/test/QT/INCLUDE" --include_path="E:/CCS6.0/first/INCLUDE" -g --display_error_number --diag_warning=225 --diag_wrap=off --preproc_with_compile --preproc_dependency="SRC/QT.d" --obj_directory="SRC" "../SRC/QT.c" >> Compilation failure SRC/subdir_rules.mk:84: recipe for target 'SRC/QT.obj' failed "../SRC/QT.c", line 8: warning #163-D: unrecognized #pragma "../SRC/QT.c", line 10: error #20: identifier "uint16_t" is undefined "../SRC/QT.c", line 11: error #20: identifier "uint16_t" is undefined "../SRC/QT.c", line 12: error #20: identifier "uint32_t" is undefined "../SRC/QT.c", line 13: error #20: identifier "uint8_t" is undefined "../SRC/QT.c", line 14: error #20: identifier "uint16_t" is undefined "../SRC/QT.c", line 15: error #20: identifier "uint16_t" is undefined "../SRC/QT.c", line 17: warning #163-D: unrecognized #pragma "../SRC/QT.c", line 38: error #137: struct "ADC_REGS" has no field "ADCSOC0CTL" "../SRC/QT.c", line 39: error #137: struct "ADCTRL2_BITS" has no field "SOC_SEQ0" "../SRC/QT.c", line 40: error #137: struct "ADCST_BITS" has no field "INT_SEQ0" "../SRC/QT.c", line 41: error #20: identifier "uint16_t" is undefined "../SRC/QT.c", line 47: error #20: identifier "CPU_TIMER0_TIM" is undefined "../SRC/QT.c", line 51: error #20: identifier "uint16_t" is undefined "../SRC/QT.c", line 52: error #20: identifier "uint8_t" is undefined "../SRC/QT.c", line 52: error #20: identifier "data" is undefined "../SRC/QT.c", line 52: error #29: expected an expression "../SRC/QT.c", line 52: error #42: expression must have arithmetic or pointer type "../SRC/QT.c", line 53: error #29: expected an expression "../SRC/QT.c", line 53: error #20: identifier "i" is undefined "../SRC/QT.c", line 55: error #29: expected an expression "../SRC/QT.c", line 55: error #20: identifier "j" is undefined "../SRC/QT.c", line 61: warning #225-D: function "sci_xmit" declared implicitly 20 errors detected in the compilation of "../SRC/QT.c". gmake: *** [SRC/QT.obj] Error 1 gmake: Target 'all' not remade because of errors. **** Build Finished ****
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08-31
3. **定时器初始化**：代码中使用了`CPU_TIMER0_TIM`作为时间戳，需要初始化定时器0并启动。 4. **ADC转换启动**：注意，启动转换位（`SOC_SEQ0`）是上升沿触发，所以写1后会自动清零，不需要手动清零。 5. **CRC...
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biao2488890051的博客
11-14 1万+
该函数的声明为：int startTimer(int interval, Qt::TimerType timerType = Qt::CoarseTimer);参数一为时间间隔，单位毫秒；Qt::VeryCoarseTimer（很粗略的定时器，只保留完整的第二精度，大约为500毫秒）；Qt::PreciseTimer（精确的定时器，尽量保持毫秒精度，试图保持精确度在1毫秒）；Qt::CoarseTimer（粗略的定时器，尽量保持精度在所需的时间间隔5%范围内）；该函数关闭一个定时器，参数为定时器的编号。
8、Qt中定时器的使用
Viciower的博客
12-01 3346
Qt定时器；QTimerEvent；QTimer
QT开发--定时器和事件
荒野
10-12 872
qt5
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