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。现在通过测试已经确定了问题出在串口接收有关的代码上，跟数据处理没有关系，跟界面刷新也没有关联，帮我分析数据接收的问题
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本文探讨了在使用C++11进行嵌入式开发时如何处理内存限制的问题，特别是在Handler类中利用bitfields来节省内存。由于C++11不支持bitfields特性，文章进一步说明了这一限制，并指出C++20开始支持该特性。
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