串口小工具（来源网络，源码修改）

从CSDN 中的一位博主的分享做了一些修改

QtSerial 的配和更稳定些

信号和槽 … … 更不容易崩

# This Python file uses the following encoding: utf-8
import sys
import time

from PySide6.QtGui import QIcon, QTextCursor
from PySide6.QtWidgets import QApplication, QWidget, QMainWindow, QMessageBox
from PySide6.QtCore import QTimer, QThread
# Important:
# You need to run the following command to generate the ui_form.py file
#     pyside6-uic form.ui -o ui_form.py, or
#     pyside2-uic form.ui -o ui_form.py
from ui_form import Ui_MainWindow
import PySide6.QtSerialPort as serial
import PySide6.QtCore as QtCore


class MainWindow(QMainWindow, Ui_MainWindow):
    _recvThread = None
    portSelect = None
    bitSize = serial.QSerialPort.DataBits.Data8

    def __init__(self, parent=None):
        super().__init__(parent)
        self.portDict = None
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

        self.setWindowTitle('串口小工具')

        self.mSerial = serial.QSerialPort()
        self.ScanComPort()  # 扫描一次串口端口
        self.OnPortChanged()

        self.ui.comboBox_Baudrate.setCurrentText("115200")  # 设置默认波特率
        self.ui.comboBox_ByteSize.setCurrentText("8")  # 设置默认数据位

        self.ui.BtnScanPort.clicked.connect(self.ScanComPort)
        self.ui.BtnOpenPort.clicked.connect(self.OpenComPort)
        self.ui.BtnClosePort.clicked.connect(self.CloseComPort)
        self.ui.BtnSendData.clicked.connect(self.SendData)
        self.ui.BtnClearRecv.clicked.connect(self.ClearRecvText)
        self.ui.BtnClearSend.clicked.connect(self.ClearSendText)
        self.ui.comboBox_ComPort.currentIndexChanged.connect(self.OnPortChanged)

    def ClearRecvText(self):
        self.ui.textBrowserRecvArea.clear()

    def ClearSendText(self):
        self.ui.lineEdit_SendData.clear()

    def OnPortChanged(self):
        if len(self.portDict) > 0:
            self.ui.label_CurrentPortName.setText(self.portDict[self.ui.comboBox_ComPort.currentText()])

    def ScanComPort(self):
        self.portDict = {}
        self.portSelect = {}
        self.ui.comboBox_ComPort.clear()
        portList = serial.QSerialPortInfo.availablePorts()
        for port in portList:
            self.portDict["%s" % port.portName()] = "%s" % port.description()
            self.portSelect["%s" % port.portName()] = port
            self.ui.comboBox_ComPort.addItem(port.portName())
        if len(self.portDict) == 0:
            QMessageBox.critical(self, "警告", "未找到串口", QMessageBox.StandardButton.Cancel,
                                 QMessageBox.StandardButton.Cancel)
        pass

    def OpenComPort(self):
        port = self.ui.comboBox_ComPort.currentText()
        self.mSerial.setPort(self.portSelect[port])
        baudrate = int(self.ui.comboBox_Baudrate.currentText())
        self.mSerial.setBaudRate(baudrate)

        # 数据位设置
        bytesize = self.ui.comboBox_ByteSize.currentText()
        if "5" == bytesize:
            bitSize = serial.QSerialPort.DataBits.Data5
        elif "6" == bytesize:
            bitSize = serial.QSerialPort.DataBits.Data6
        elif "7" == bytesize:
            bitSize = serial.QSerialPort.DataBits.Data7
        elif "8" == bytesize:
            bitSize = serial.QSerialPort.DataBits.Data8
        self.mSerial.setDataBits(bitSize)

        stopbitsItems = [serial.QSerialPort.StopBits.OneStop, serial.QSerialPort.StopBits.OneAndHalfStop,
                         serial.QSerialPort.StopBits.TwoStop]
        stopbits = stopbitsItems[self.ui.comboBox_Stopbits.currentIndex()]
        self.mSerial.setStopBits(stopbits)

        parityItmes = [serial.QSerialPort.Parity.NoParity,
                       serial.QSerialPort.Parity.OddParity,
                       serial.QSerialPort.Parity.EvenParity,
                       serial.QSerialPort.Parity.MarkParity,
                       serial.QSerialPort.Parity.SpaceParity,
                       serial.QSerialPort.Parity.NoParity]
        self.mSerial.setParity(parityItmes[self.ui.comboBox_Parity.currentIndex()])

        flowctrl = self.ui.comboBox_FlowCtrl.currentText()
        if 'None' == flowctrl:
            self.mSerial.setFlowControl(serial.QSerialPort.FlowControl.NoFlowControl)
        elif 'XON/XOFF' == flowctrl:
            self.mSerial.setFlowControl(serial.QSerialPort.FlowControl.SoftwareControl)
        elif 'RTS/CTS' == flowctrl:
            self.mSerial.setFlowControl(serial.QSerialPort.FlowControl.HardwareControl)

        self.mSerial.timeout = 100
        if self.mSerial.isOpen():
            QMessageBox.warning(self, "警告", "串口已打开", QMessageBox.StandardButton.Cancel,
                                QMessageBox.StandardButton.Cancel)

        else:
            try:
                self.ui.BtnOpenPort.setEnabled(False)
                self.mSerial.open(QtCore.QIODeviceBase.OpenModeFlag.ReadWrite)
                self.mSerial.flush()
                self._recvThread = QThread(self)
                self._recvThread.run = self.RecvData
                self._recvThread.start()
            except SerialException as error:
                QMessageBox.critical(self, "警告", "串口打开失败:%s" % error.strerror,
                                     QMessageBox.StandardButton.Cancel,
                                     QMessageBox.StandardButton.Cancel)
                self.ui.BtnOpenPort.setEnabled(True)

        self.mSerial.readyRead.connect(self.RecvData)

    def CloseComPort(self):
        if self._recvThread is not None:
            if self._recvThread.isRunning():
                self._recvThread.exit(1)
        if self.mSerial.isOpen():
            self.ui.BtnOpenPort.setEnabled(True)
            self.mSerial.flush()
            self.mSerial.close()
        pass

    def SendData(self):
        if self.mSerial.isOpen():
            if self.mSerial.isWritable():
                sendtext = self.ui.lineEdit_SendData.text() + "\r"
                self.mSerial.write(sendtext.encode("utf-8"))
        else:
            QMessageBox.warning(self, "警告", "串口未打开，请先打开串口", QMessageBox.StandardButton.Cancel,
                                QMessageBox.StandardButton.Cancel)

    def refreshConsole(self):
        self.ui.textBrowserRecvArea.moveCursor(QTextCursor.MoveOperation.End)

    def RecvData(self):
        rdata = self.mSerial.readAll()
        self.ui.textBrowserRecvArea.append(rdata.data().decode("utf-8").strip("\n"))
        self.refreshConsole()



if __name__ == '__main__':
    app = QApplication(sys.argv)
    mw = MainWindow()
    mw.show()
    sys.exit(app.exec())

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>1439</width>
    <height>713</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <widget class="QGroupBox" name="groupBox_ComSettings">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>20</y>
      <width>221</width>
      <height>471</height>
     </rect>
    </property>
    <property name="title">
     <string>串口设置</string>
    </property>
    <widget class="QWidget" name="horizontalLayoutWidget">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>400</y>
       <width>201</width>
       <height>51</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="QPushButton" name="BtnOpenPort">
        <property name="text">
         <string>打开串口</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="BtnClosePort">
        <property name="text">
         <string>关闭串口</string>
        </property>
       </widget>
      </item>
     </layout>
    </widget>
    <widget class="QWidget" name="horizontalLayoutWidget_2">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>350</y>
       <width>201</width>
       <height>51</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout_8">
      <item>
       <widget class="QPushButton" name="BtnScanPort">
        <property name="text">
         <string>扫描端口</string>
        </property>
       </widget>
      </item>
     </layout>
    </widget>
    <widget class="QLabel" name="label_CurrentPortName">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>20</y>
       <width>201</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string/>
     </property>
    </widget>
    <widget class="QWidget" name="layoutWidget">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>60</y>
       <width>201</width>
       <height>281</height>
      </rect>
     </property>
     <layout class="QVBoxLayout" name="verticalLayout">
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_2">
        <item>
         <widget class="QLabel" name="label_ComPort">
          <property name="maximumSize">
           <size>
            <width>60</width>
            <height>16777215</height>
           </size>
          </property>
          <property name="text">
           <string>串  口</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QComboBox" name="comboBox_ComPort">
          <property name="editable">
           <bool>false</bool>
          </property>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_3">
        <item>
         <widget class="QLabel" name="label_Baudrate">
          <property name="maximumSize">
           <size>
            <width>60</width>
            <height>16777215</height>
           </size>
          </property>
          <property name="text">
           <string>波特率</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QComboBox" name="comboBox_Baudrate">
          <property name="editable">
           <bool>true</bool>
          </property>
          <property name="currentText">
           <string>115200</string>
          </property>
          <property name="currentIndex">
           <number>8</number>
          </property>
          <item>
           <property name="text">
            <string>2400</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>4800</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>9600</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>14400</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>19200</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>38400</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>56000</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>57600</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>115200</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>128000</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>256000</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>230400</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>1000000</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>2000000</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>3000000</string>
           </property>
          </item>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_4">
        <item>
         <widget class="QLabel" name="label_ByteSize">
          <property name="maximumSize">
           <size>
            <width>60</width>
            <height>16777215</height>
           </size>
          </property>
          <property name="text">
           <string>数据位</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QComboBox" name="comboBox_ByteSize">
          <property name="editable">
           <bool>false</bool>
          </property>
          <property name="currentText">
           <string>8</string>
          </property>
          <property name="currentIndex">
           <number>3</number>
          </property>
          <item>
           <property name="text">
            <string>5</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>6</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>7</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>8</string>
           </property>
          </item>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_6">
        <item>
         <widget class="QLabel" name="label_Stopbits">
          <property name="maximumSize">
           <size>
            <width>60</width>
            <height>16777215</height>
           </size>
          </property>
          <property name="text">
           <string>停止位</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QComboBox" name="comboBox_Stopbits">
          <item>
           <property name="text">
            <string>1</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>1.5</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>2</string>
           </property>
          </item>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_5">
        <item>
         <widget class="QLabel" name="label_Parity">
          <property name="maximumSize">
           <size>
            <width>60</width>
            <height>16777215</height>
           </size>
          </property>
          <property name="text">
           <string>校验位</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QComboBox" name="comboBox_Parity">
          <item>
           <property name="text">
            <string>None</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>Odd</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>Even</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>Mark</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>Space</string>
           </property>
          </item>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_7">
        <item>
         <widget class="QLabel" name="label_CTS">
          <property name="maximumSize">
           <size>
            <width>60</width>
            <height>16777215</height>
           </size>
          </property>
          <property name="text">
           <string>流  控</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QComboBox" name="comboBox_FlowCtrl">
          <item>
           <property name="text">
            <string>None</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>RTS/CTS</string>
           </property>
          </item>
          <item>
           <property name="text">
            <string>XON/XOFF</string>
           </property>
          </item>
         </widget>
        </item>
       </layout>
      </item>
     </layout>
    </widget>
   </widget>
   <widget class="QGroupBox" name="groupBox">
    <property name="geometry">
     <rect>
      <x>250</x>
      <y>20</y>
      <width>1181</width>
      <height>471</height>
     </rect>
    </property>
    <property name="title">
     <string>接收区</string>
    </property>
    <widget class="QTextBrowser" name="textBrowserRecvArea">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>20</y>
       <width>1161</width>
       <height>441</height>
      </rect>
     </property>
    </widget>
   </widget>
   <widget class="QGroupBox" name="groupBox_2">
    <property name="geometry">
     <rect>
      <x>250</x>
      <y>500</y>
      <width>1181</width>
      <height>151</height>
     </rect>
    </property>
    <property name="title">
     <string>发送区</string>
    </property>
    <widget class="QLineEdit" name="lineEdit_SendData">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>20</y>
       <width>561</width>
       <height>31</height>
      </rect>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnSendData">
     <property name="geometry">
      <rect>
       <x>580</x>
       <y>20</y>
       <width>181</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>发送数据</string>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnClearRecv">
     <property name="geometry">
      <rect>
       <x>760</x>
       <y>20</y>
       <width>171</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>清空接收区</string>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnClearSend">
     <property name="geometry">
      <rect>
       <x>930</x>
       <y>20</y>
       <width>171</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>清空发送区</string>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnSendData_2">
     <property name="geometry">
      <rect>
       <x>930</x>
       <y>60</y>
       <width>171</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>循环执行脚本</string>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnSendData_3">
     <property name="geometry">
      <rect>
       <x>760</x>
       <y>60</y>
       <width>171</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>导入命令脚本</string>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnSendData_4">
     <property name="geometry">
      <rect>
       <x>580</x>
       <y>60</y>
       <width>181</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>执行命令脚本</string>
     </property>
    </widget>
    <widget class="QComboBox" name="comboBox">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>100</y>
       <width>561</width>
       <height>31</height>
      </rect>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnSendData_5">
     <property name="geometry">
      <rect>
       <x>580</x>
       <y>100</y>
       <width>181</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>变更输出解析类型</string>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnSendData_6">
     <property name="geometry">
      <rect>
       <x>760</x>
       <y>100</y>
       <width>171</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>导入输出解析类型</string>
     </property>
    </widget>
    <widget class="QPushButton" name="BtnSendData_7">
     <property name="geometry">
      <rect>
       <x>930</x>
       <y>100</y>
       <width>171</width>
       <height>31</height>
      </rect>
     </property>
     <property name="text">
      <string>冻结/解冻</string>
     </property>
    </widget>
    <widget class="QComboBox" name="comboBox_2">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>60</y>
       <width>561</width>
       <height>31</height>
      </rect>
     </property>
    </widget>
   </widget>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>1439</width>
     <height>17</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

在这里插入图片描述 > 添加键盘监听事件