【Hardware】串口驱动

1. Serial Type

1.1. 物理接口形式

  • UART接口：通用异步收发器（Universal Asynchronous Receiver/Transmitter)，UART是串口收发的逻辑电路，这部分可以独立成芯片，也可以作为模块嵌入到其他芯片里，单片机、SOC、PC里都会有UART模块。
  • **COM口：**特指台式计算机或一些电子设备上的D-SUB外形(一种连接器结构，VGA接口的连接器也是D-SUB)的串行通信口，应用了串口通信时序和RS232的逻辑电平。
  • **USB口：**通用串行总线，和串口完全是两个概念。虽然也是串行方式通信，但由于USB的通信时序和信号电平都和串口完全不同，因此和串口没有任何关系。USB是高速的通信接口，用于PC连接各种外设，U盘、键鼠、移动硬盘、当然也包括“USB转串口”的模块。（USB转串口模块，就是USB接口的UART模块）

1.2. 逻辑电平形式

  • **TTL：**TTL指双极型三极管逻辑电路，市面上很多“USB转TTL”模块，实际上是“USB转TTL电平的串口”模块。这种信号0对应0V，1对应3.3V或者5V。与单片机、SOC的IO电平兼容。T

    TL电平：全双工（逻辑1: 2.4V–5V 逻辑0: 0V–0.5V）. 常见的USB转TTL芯片有CH340、PL2303、FT232、CP2102等

  • **RS232：**是电子工业协会(Electronic Industries Association，EIA) 制定的异步传输标准接口，同时对应着电平标准和通信协议（时序），其电平标准：+3V～+15V对应0，-3V～-15V对应1。rs232 的逻辑电平和TTL 不一样但是协议一样。

    RS-232电平：全双工（逻辑1：-15V–5V 逻辑0：+3V–+15V). 232芯片用于5V单片机，3232芯片用于3.3V单片机。

  • **RS485：**RS485是一种串口接口标准，为了长距离传输采用差分方式传输，传输的是差分信号，抗干扰能力比RS232强很多。两线压差为-(26)V表示0，两线压差为+(26)V表示1

    RS-485：半双工、（逻辑1：+2V–+6V 逻辑0： -6V—2V）这里的电平指AB 两线间的电压差。

2. Serial Class-pyserial

ser=serial.Serial("/dev/ttyUSB0",9600,timeout=0.5) #使用USB连接串行口
ser=serial.Serial("/dev/ttyAMA0",9600,timeout=0.5) #使用树莓派的GPIO口连接串行口
ser=serial.Serial(1,9600,timeout=0.5)#winsows系统使用com1口连接串行口
ser=serial.Serial("com1",9600,timeout=0.5)#winsows系统使用com1口连接串行口
ser=serial.Serial("/dev/ttyS1",9600,timeout=0.5)#Linux系统使用com1口连接串行口
  • 属性

name:设备名字
port：读或者写端口
baudrate：波特率
bytesize：字节大小
parity：校验位
stopbits：停止位
timeout：读超时设置
writeTimeout：写超时
xonxoff：软件流控
rtscts：硬件流控
dsrdtr：硬件流控
interCharTimeout:字符间隔超时

  • 方法

ser.isOpen()：查看端口是否被打开。
ser.open() ：打开端口‘。
ser.close()：关闭端口。
ser.read()：从端口读字节数据。默认1个字节。
ser.read_all():从端口接收全部数据。
ser.write(“hello”)：向端口写数据。
ser.readline()：读一行数据。
ser.readlines()：读多行数据。
in_waiting()：返回接收缓存中的字节数。
flush()：等待所有数据写出。
flushInput()：丢弃接收缓存中的所有数据。
flushOutput()：终止当前写操作，并丢弃发送缓存中的数据。

  • 函数封装
from PyQt5.QtCore import QTimer
import serial
import serial.tools.list_portsclass FlexSensor(object):def __init__(self,com,bps,timeout):self.port = comself.bps = bpsself.timeout =timeout#self.timer=Qtimer()global Ret     # flag: 判断是否打开，如果打开，Ret=truetry:# 打开串口，并得到串口对象self.main_engine= serial.Serial(self.port,self.bps,timeout=self.timeout)# 判断是否打开成功if (self.main_engine.is_open):Ret = Trueexcept Exception as e:print("---异常---：", e)# 打印设备基本信息def Print_Name(self):print(self.main_engine.name) #设备名字print(self.main_engine.port)#读或者写端口print(self.main_engine.baudrate)#波特率print(self.main_engine.bytesize)#字节大小print(self.main_engine.parity)#校验位print(self.main_engine.stopbits)#停止位print(self.main_engine.timeout)#读超时设置print(self.main_engine.writeTimeout)#写超时print(self.main_engine.xonxoff)#软件流控print(self.main_engine.rtscts)#软件流控print(self.main_engine.dsrdtr)#硬件流控print(self.main_engine.interCharTimeout)#字符间隔超时#打开串口def Open_Engine(self):self.main_engine.open()#关闭串口def Close_Engine(self):self.main_engine.close()print(self.main_engine.is_open)  # 检验串口是否打开# 打印可用串口列表@staticmethoddef Print_Used_Com():port_list = list(serial.tools.list_ports.comports())print(port_list)#接收指定大小的数据#从串口读size个字节。如果指定超时，则可能在超时后返回较少的字节；如果没有指定超时，则会一直等到收完指定的字节数。def Read_Size(self,size):return self.main_engine.read(size=size)#接收一行数据# 使用readline()时应该注意：打开串口时应该指定超时，否则如果串口没有收到新行，则会一直等待。# 如果没有超时，readline会报异常。def Read_Line(self):return self.main_engine.readline()#发数据def Send_data(self,data):self.main_engine.write(data)#接收数据#一个整型数据占两个字节#一个字符占一个字节def Recive_data(self,way):# 循环接收数据，此为死循环，可用线程实现print("开始接收数据：")while True:try:# 一个字节一个字节的接收if self.main_engine.in_waiting:if(way == 0):for i in range(self.main_engine.in_waiting):print("接收ascii数据："+str(self.Read_Size(1)))data1 = self.Read_Size(1).hex()#转为十六进制data2 = int(data1,16)#转为十进制print("收到数据十六进制："+data1+"  收到数据十进制："+str(data2))if(way == 1):#整体接收# data = self.main_engine.read(self.main_engine.in_waiting).decode("utf-8")#方式一data = self.main_engine.read_all()#方式二print("接收ascii数据：", data)except Exception as e:print("异常报错：",e)if __name__ == "__main__":FlexSensor.Print_Used_Com()Ret =False #是否创建成功标志Engine1 = FlexSensor("com5",115200,0.5)

3. 串口相关项目

3.1. Qt-based QSerial

  • UI布局文件
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0"><class>Form</class><widget class="QWidget" name="Form"><property name="windowModality"><enum>Qt::NonModal</enum></property><property name="geometry"><rect><x>0</x><y>0</y><width>704</width><height>562</height></rect></property><property name="font"><font><family>方正兰亭中黑_GBK</family><pointsize>9</pointsize><weight>50</weight><italic>false</italic><bold>false</bold></font></property><property name="cursor"><cursorShape>PointingHandCursor</cursorShape></property><property name="mouseTracking"><bool>false</bool></property><property name="windowTitle"><string>Form</string></property><property name="styleSheet"><string notr="true">color: rgb(255, 255, 255);
background-color: rgb(25, 25, 25);
font: 9pt &quot;方正兰亭中黑_GBK&quot;;</string></property><widget class="QLabel" name="label"><property name="geometry"><rect><x>40</x><y>40</y><width>71</width><height>21</height></rect></property><property name="text"><string>接收区</string></property></widget><widget class="QLabel" name="label_2"><property name="geometry"><rect><x>40</x><y>355</y><width>54</width><height>12</height></rect></property><property name="text"><string>发送区</string></property><property name="textFormat"><enum>Qt::AutoText</enum></property></widget><widget class="QPushButton" name="Send_Button"><property name="geometry"><rect><x>330</x><y>350</y><width>75</width><height>23</height></rect></property><property name="text"><string>发送</string></property></widget><widget class="QPushButton" name="ClearButton"><property name="geometry"><rect><x>330</x><y>40</y><width>75</width><height>23</height></rect></property><property name="text"><string>清除</string></property></widget><widget class="QTextEdit" name="textEdit_Recive"><property name="geometry"><rect><x>40</x><y>70</y><width>361</width><height>251</height></rect></property><property name="styleSheet"><string notr="true">background-color: rgb(255, 255, 255);
background-color: rgb(0, 0, 0);</string></property><property name="html"><string>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
p, li { white-space: pre-wrap; }
&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'方正兰亭中黑_GBK'; font-size:9pt; font-weight:400; font-style:normal;&quot;&gt;
&lt;p style=&quot;-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'SimSun';&quot;&gt;&lt;br /&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string></property></widget><widget class="QTextEdit" name="textEdit_Send"><property name="geometry"><rect><x>40</x><y>385</y><width>361</width><height>151</height></rect></property><property name="styleSheet"><string notr="true">background-color: rgb(0, 0, 0);</string></property></widget><widget class="QWidget" name="gridLayoutWidget"><property name="geometry"><rect><x>440</x><y>100</y><width>221</width><height>171</height></rect></property><layout class="QGridLayout" name="gridLayout"><item row="1" column="0"><widget class="QLabel" name="Com_Baud_Label"><property name="text"><string>波特率</string></property><property name="alignment"><set>Qt::AlignCenter</set></property></widget></item><item row="4" column="1"><widget class="QPushButton" name="Com_Close_Button"><property name="text"><string>Close</string></property><property name="default"><bool>false</bool></property></widget></item><item row="2" column="0"><widget class="QLabel" name="Com_Name_Label"><property name="text"><string>串口选择</string></property><property name="alignment"><set>Qt::AlignCenter</set></property></widget></item><item row="2" column="1"><widget class="QComboBox" name="Com_Name_Combo"/></item><item row="0" column="0"><widget class="QLabel" name="Com_Refresh_Label"><property name="text"><string>串口搜索</string></property><property name="alignment"><set>Qt::AlignCenter</set></property></widget></item><item row="0" column="1"><widget class="QPushButton" name="Com_Refresh_Button"><property name="text"><string>刷新</string></property></widget></item><item row="3" column="0"><widget class="QLabel" name="Com_State_Label"><property name="text"><string>串口操作</string></property><property name="alignment"><set>Qt::AlignCenter</set></property></widget></item><item row="1" column="1"><widget class="QComboBox" name="Com_Baud_Combo"><property name="editable"><bool>true</bool></property><property name="currentText"><string>1200</string></property><property name="duplicatesEnabled"><bool>false</bool></property><property name="modelColumn"><number>0</number></property><item><property name="text"><string>1200</string></property></item><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>43000</string></property></item><item><property name="text"><string>57600</string></property></item><item><property name="text"><string>76800</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>230400</string></property></item><item><property name="text"><string>256000</string></property></item><item><property name="text"><string>460800</string></property></item><item><property name="text"><string>921600</string></property></item><item><property name="text"><string>1382400</string></property></item></widget></item><item row="3" column="1"><widget class="QPushButton" name="Com_Open_Button"><property name="text"><string>Open</string></property></widget></item><item row="4" column="0"><widget class="QLabel" name="Com_isOpenOrNot_Label"><property name="text"><string/></property><property name="alignment"><set>Qt::AlignCenter</set></property></widget></item></layout></widget><widget class="QCheckBox" name="hexSending_checkBox"><property name="geometry"><rect><x>240</x><y>345</y><width>91</width><height>31</height></rect></property><property name="text"><string>16进制发送</string></property></widget><widget class="QCheckBox" name="hexShowing_checkBox"><property name="geometry"><rect><x>240</x><y>40</y><width>81</width><height>20</height></rect></property><property name="text"><string>16进制显示</string></property></widget><widget class="QCalendarWidget" name="calendarWidget"><property name="geometry"><rect><x>430</x><y>350</y><width>251</width><height>181</height></rect></property><property name="styleSheet"><string notr="true">alternate-background-color: rgb(0, 0, 0);
background-color: rgb(0, 0, 0);</string></property><property name="firstDayOfWeek"><enum>Qt::Sunday</enum></property><property name="horizontalHeaderFormat"><enum>QCalendarWidget::ShortDayNames</enum></property><property name="verticalHeaderFormat"><enum>QCalendarWidget::ISOWeekNumbers</enum></property></widget><widget class="QLabel" name="Time_Label"><property name="geometry"><rect><x>460</x><y>310</y><width>181</width><height>21</height></rect></property><property name="font"><font><family>方正兰亭中黑_GBK</family><pointsize>9</pointsize><weight>50</weight><italic>false</italic><bold>false</bold></font></property><property name="text"><string>Time</string></property><property name="alignment"><set>Qt::AlignCenter</set></property></widget><widget class="QPushButton" name="About_Button"><property name="geometry"><rect><x>440</x><y>40</y><width>221</width><height>31</height></rect></property><property name="font"><font><family>方正兰亭中黑_GBK</family><pointsize>9</pointsize><weight>50</weight><italic>false</italic><bold>false</bold></font></property><property name="text"><string>Made by PyQt5 - 查看源代码</string></property></widget></widget><resources/><connections><connection><sender>ClearButton</sender><signal>clicked()</signal><receiver>textEdit_Recive</receiver><slot>clear()</slot><hints><hint type="sourcelabel"><x>367</x><y>51</y></hint><hint type="destinationlabel"><x>368</x><y>79</y></hint></hints></connection></connections>
</ui>
  • 主程序逻辑
import re
import sys
import binascii
import time
from PyQt5.QtCore import QTimer, QUrl
from PyQt5.QtWidgets import *
from PyQt5.QtSerialPort import QSerialPort, QSerialPortInfo
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtWebEngineWidgets import *
from Ui_SerialPort import Ui_Form
from PyQt5.QtCore import QDate
class MyMainWindow(QMainWindow, Ui_Form):def __init__(self, parent=None):super(MyMainWindow, self).__init__(parent)self.setupUi(self)# 设置实例self.CreateItems()# 设置信号与槽self.CreateSignalSlot()# 设置实例 def CreateItems(self):# Qt 串口类self.com = QSerialPort()# Qt 定时器类self.timer = QTimer(self) #初始化一个定时器self.timer.timeout.connect(self.ShowTime) #计时结束调用operate()方法self.timer.start(100) #设置计时间隔 100ms 并启动# 设置信号与槽def CreateSignalSlot(self):self.Com_Open_Button.clicked.connect(self.Com_Open_Button_clicked) self.Com_Close_Button.clicked.connect(self.Com_Close_Button_clicked) self.Send_Button.clicked.connect(self.SendButton_clicked) self.Com_Refresh_Button.clicked.connect(self.Com_Refresh_Button_Clicked) self.com.readyRead.connect(self.Com_Receive_Data) # 接收数据self.hexSending_checkBox.stateChanged.connect(self.hexShowingClicked)self.hexSending_checkBox.stateChanged.connect(self.hexSendingClicked)self.About_Button.clicked.connect(self.Goto_GitHub) # 跳转到 GitHub 查看源代码def Goto_GitHub(self):self.browser = QWebEngineView()self.browser.load(QUrl('https://github.com/Oslomayor/PyQt5-SerialPort-Stable'))self.setCentralWidget(self.browser)# 显示时间def ShowTime(self):self.Time_Label.setText(time.strftime("%B %d, %H:%M:%S", time.localtime())) # 串口发送数据def Com_Send_Data(self):txData = self.textEdit_Send.toPlainText()if len(txData) == 0 :returnif self.hexSending_checkBox.isChecked() == False:self.com.write(txData.encode('UTF-8'))else:Data = txData.replace(' ', '')# 如果16进制不是偶数个字符, 去掉最后一个, [ ]左闭右开if len(Data)%2 == 1:Data = Data[0:len(Data)-1]# 如果遇到非16进制字符if Data.isalnum() is False:QMessageBox.critical(self, '错误', '包含非十六进制数')try:hexData = binascii.a2b_hex(Data)except:QMessageBox.critical(self, '错误', '转换编码错误')return# 发送16进制数据, 发送格式如 ‘31 32 33 41 42 43’, 代表'123ABC'try:self.com.write(hexData) except:QMessageBox.critical(self, '异常', '十六进制发送错误')return# 串口接收数据def Com_Receive_Data(self):try:rxData = bytes(self.com.readAll())except:QMessageBox.critical(self, '严重错误', '串口接收数据错误')if self.hexShowing_checkBox.isChecked() == False :try:self.textEdit_Recive.insertPlainText(rxData.decode('UTF-8'))except:passelse :Data = binascii.b2a_hex(rxData).decode('ascii')# re 正则表达式 (.{2}) 匹配两个字母hexStr = ' 0x'.join(re.findall('(.{2})', Data))# 补齐第一个 0xhexStr = '0x' + hexStrself.textEdit_Recive.insertPlainText(hexStr)self.textEdit_Recive.insertPlainText(' ')     # 串口刷新def Com_Refresh_Button_Clicked(self):self.Com_Name_Combo.clear()com = QSerialPort()com_list = QSerialPortInfo.availablePorts()for info in com_list:com.setPort(info)if com.open(QSerialPort.ReadWrite):self.Com_Name_Combo.addItem(info.portName())com.close()# 16进制显示按下   def hexShowingClicked(self):if self.hexShowing_checkBox.isChecked() == True:# 接收区换行self.textEdit_Recive.insertPlainText('\n')# 16进制发送按下   def hexSendingClicked(self):if self.hexSending_checkBox.isChecked() == True:pass# 发送按钮按下def SendButton_clicked(self):self.Com_Send_Data()# 串口刷新按钮按下def Com_Open_Button_clicked(self):#### com Open Code here ####comName = self.Com_Name_Combo.currentText()comBaud = int(self.Com_Baud_Combo.currentText())self.com.setPortName(comName)try:if self.com.open(QSerialPort.ReadWrite) == False:QMessageBox.critical(self, '严重错误', '串口打开失败')returnexcept:QMessageBox.critical(self, '严重错误', '串口打开失败')returnself.Com_Close_Button.setEnabled(True)self.Com_Open_Button.setEnabled(False)self.Com_Refresh_Button.setEnabled(False)self.Com_Name_Combo.setEnabled(False)self.Com_Baud_Combo.setEnabled(False)self.Com_isOpenOrNot_Label.setText('  已打开')self.com.setBaudRate(comBaud)def Com_Close_Button_clicked(self):self.com.close()self.Com_Close_Button.setEnabled(False)self.Com_Open_Button.setEnabled(True)self.Com_Refresh_Button.setEnabled(True)self.Com_Name_Combo.setEnabled(True)self.Com_Baud_Combo.setEnabled(True)self.Com_isOpenOrNot_Label.setText('  已关闭')
if __name__ == '__main__':app = QApplication(sys.argv)myWin = MyMainWindow()myWin.show()sys.exit(app.exec_())

3.2. Qt-serial

  • UI_file
# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'demo_1.ui'
#
# Created by: PyQt5 UI code generator 5.6
#
# WARNING! All changes made in this file will be lost!from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_Form(object):def setupUi(self, Form):Form.setObjectName("Form")Form.resize(707, 458)self.formGroupBox = QtWidgets.QGroupBox(Form)self.formGroupBox.setGeometry(QtCore.QRect(20, 20, 167, 301))self.formGroupBox.setObjectName("formGroupBox")self.formLayout = QtWidgets.QFormLayout(self.formGroupBox)self.formLayout.setContentsMargins(10, 10, 10, 10)self.formLayout.setSpacing(10)self.formLayout.setObjectName("formLayout")self.s1__lb_1 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_1.setObjectName("s1__lb_1")self.formLayout.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.s1__lb_1)self.s1__box_1 = QtWidgets.QPushButton(self.formGroupBox)self.s1__box_1.setAutoRepeatInterval(100)self.s1__box_1.setDefault(True)self.s1__box_1.setObjectName("s1__box_1")self.formLayout.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.s1__box_1)self.s1__lb_2 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_2.setObjectName("s1__lb_2")self.formLayout.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.s1__lb_2)self.s1__box_2 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_2.setObjectName("s1__box_2")self.formLayout.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.s1__box_2)self.s1__lb_3 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_3.setObjectName("s1__lb_3")self.formLayout.setWidget(3, QtWidgets.QFormLayout.LabelRole, self.s1__lb_3)self.s1__box_3 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_3.setObjectName("s1__box_3")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.formLayout.setWidget(3, QtWidgets.QFormLayout.FieldRole, self.s1__box_3)self.s1__lb_4 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_4.setObjectName("s1__lb_4")self.formLayout.setWidget(4, QtWidgets.QFormLayout.LabelRole, self.s1__lb_4)self.s1__box_4 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_4.setObjectName("s1__box_4")self.s1__box_4.addItem("")self.s1__box_4.addItem("")self.s1__box_4.addItem("")self.s1__box_4.addItem("")self.formLayout.setWidget(4, QtWidgets.QFormLayout.FieldRole, self.s1__box_4)self.s1__lb_5 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_5.setObjectName("s1__lb_5")self.formLayout.setWidget(5, QtWidgets.QFormLayout.LabelRole, self.s1__lb_5)self.s1__box_5 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_5.setObjectName("s1__box_5")self.s1__box_5.addItem("")self.formLayout.setWidget(5, QtWidgets.QFormLayout.FieldRole, self.s1__box_5)self.open_button = QtWidgets.QPushButton(self.formGroupBox)self.open_button.setObjectName("open_button")self.formLayout.setWidget(7, QtWidgets.QFormLayout.SpanningRole, self.open_button)self.close_button = QtWidgets.QPushButton(self.formGroupBox)self.close_button.setObjectName("close_button")self.formLayout.setWidget(8, QtWidgets.QFormLayout.SpanningRole, self.close_button)self.s1__lb_6 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_6.setObjectName("s1__lb_6")self.formLayout.setWidget(6, QtWidgets.QFormLayout.LabelRole, self.s1__lb_6)self.s1__box_6 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_6.setObjectName("s1__box_6")self.s1__box_6.addItem("")self.formLayout.setWidget(6, QtWidgets.QFormLayout.FieldRole, self.s1__box_6)self.state_label = QtWidgets.QLabel(self.formGroupBox)self.state_label.setText("")self.state_label.setTextFormat(QtCore.Qt.AutoText)self.state_label.setScaledContents(True)self.state_label.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignTrailing | QtCore.Qt.AlignVCenter)self.state_label.setObjectName("state_label")self.formLayout.setWidget(2, QtWidgets.QFormLayout.SpanningRole, self.state_label)self.verticalGroupBox = QtWidgets.QGroupBox(Form)self.verticalGroupBox.setGeometry(QtCore.QRect(210, 20, 401, 241))self.verticalGroupBox.setObjectName("verticalGroupBox")self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalGroupBox)self.verticalLayout.setContentsMargins(10, 10, 10, 10)self.verticalLayout.setObjectName("verticalLayout")self.s2__receive_text = QtWidgets.QTextBrowser(self.verticalGroupBox)self.s2__receive_text.setObjectName("s2__receive_text")self.verticalLayout.addWidget(self.s2__receive_text)self.verticalGroupBox_2 = QtWidgets.QGroupBox(Form)self.verticalGroupBox_2.setGeometry(QtCore.QRect(210, 280, 401, 101))self.verticalGroupBox_2.setObjectName("verticalGroupBox_2")self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.verticalGroupBox_2)self.verticalLayout_2.setContentsMargins(10, 10, 10, 10)self.verticalLayout_2.setObjectName("verticalLayout_2")self.s3__send_text = QtWidgets.QTextEdit(self.verticalGroupBox_2)self.s3__send_text.setObjectName("s3__send_text")self.verticalLayout_2.addWidget(self.s3__send_text)self.s3__send_button = QtWidgets.QPushButton(Form)self.s3__send_button.setGeometry(QtCore.QRect(620, 310, 61, 31))self.s3__send_button.setObjectName("s3__send_button")self.s3__clear_button = QtWidgets.QPushButton(Form)self.s3__clear_button.setGeometry(QtCore.QRect(620, 350, 61, 31))self.s3__clear_button.setObjectName("s3__clear_button")self.formGroupBox1 = QtWidgets.QGroupBox(Form)self.formGroupBox1.setGeometry(QtCore.QRect(20, 340, 171, 101))self.formGroupBox1.setObjectName("formGroupBox1")self.formLayout_2 = QtWidgets.QFormLayout(self.formGroupBox1)self.formLayout_2.setContentsMargins(10, 10, 10, 10)self.formLayout_2.setSpacing(10)self.formLayout_2.setObjectName("formLayout_2")self.label = QtWidgets.QLabel(self.formGroupBox1)self.label.setObjectName("label")self.formLayout_2.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.label)self.label_2 = QtWidgets.QLabel(self.formGroupBox1)self.label_2.setObjectName("label_2")self.formLayout_2.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.label_2)self.lineEdit = QtWidgets.QLineEdit(self.formGroupBox1)self.lineEdit.setObjectName("lineEdit")self.formLayout_2.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.lineEdit)self.lineEdit_2 = QtWidgets.QLineEdit(self.formGroupBox1)self.lineEdit_2.setObjectName("lineEdit_2")self.formLayout_2.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.lineEdit_2)self.hex_send = QtWidgets.QCheckBox(Form)self.hex_send.setGeometry(QtCore.QRect(620, 280, 71, 16))self.hex_send.setObjectName("hex_send")self.hex_receive = QtWidgets.QCheckBox(Form)self.hex_receive.setGeometry(QtCore.QRect(620, 40, 71, 16))self.hex_receive.setObjectName("hex_receive")self.s2__clear_button = QtWidgets.QPushButton(Form)self.s2__clear_button.setGeometry(QtCore.QRect(620, 80, 61, 31))self.s2__clear_button.setObjectName("s2__clear_button")self.timer_send_cb = QtWidgets.QCheckBox(Form)self.timer_send_cb.setGeometry(QtCore.QRect(260, 390, 71, 16))self.timer_send_cb.setObjectName("timer_send_cb")self.lineEdit_3 = QtWidgets.QLineEdit(Form)self.lineEdit_3.setGeometry(QtCore.QRect(350, 390, 61, 20))self.lineEdit_3.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignTrailing | QtCore.Qt.AlignVCenter)self.lineEdit_3.setObjectName("lineEdit_3")self.dw = QtWidgets.QLabel(Form)self.dw.setGeometry(QtCore.QRect(420, 390, 54, 20))self.dw.setObjectName("dw")self.verticalGroupBox.raise_()self.verticalGroupBox_2.raise_()self.formGroupBox.raise_()self.s3__send_button.raise_()self.s3__clear_button.raise_()self.formGroupBox.raise_()self.hex_send.raise_()self.hex_receive.raise_()self.s2__clear_button.raise_()self.timer_send_cb.raise_()self.lineEdit_3.raise_()self.dw.raise_()self.retranslateUi(Form)QtCore.QMetaObject.connectSlotsByName(Form)def retranslateUi(self, Form):_translate = QtCore.QCoreApplication.translateForm.setWindowTitle(_translate("Form", "Form"))self.formGroupBox.setTitle(_translate("Form", "串口设置"))self.s1__lb_1.setText(_translate("Form", "串口检测："))self.s1__box_1.setText(_translate("Form", "检测串口"))self.s1__lb_2.setText(_translate("Form", "串口选择："))self.s1__lb_3.setText(_translate("Form", "波特率："))self.s1__box_3.setItemText(0, _translate("Form", "115200"))self.s1__box_3.setItemText(1, _translate("Form", "2400"))self.s1__box_3.setItemText(2, _translate("Form", "4800"))self.s1__box_3.setItemText(3, _translate("Form", "9600"))self.s1__box_3.setItemText(4, _translate("Form", "14400"))self.s1__box_3.setItemText(5, _translate("Form", "19200"))self.s1__box_3.setItemText(6, _translate("Form", "38400"))self.s1__box_3.setItemText(7, _translate("Form", "57600"))self.s1__box_3.setItemText(8, _translate("Form", "76800"))self.s1__box_3.setItemText(9, _translate("Form", "12800"))self.s1__box_3.setItemText(10, _translate("Form", "230400"))self.s1__box_3.setItemText(11, _translate("Form", "460800"))self.s1__lb_4.setText(_translate("Form", "数据位："))self.s1__box_4.setItemText(0, _translate("Form", "8"))self.s1__box_4.setItemText(1, _translate("Form", "7"))self.s1__box_4.setItemText(2, _translate("Form", "6"))self.s1__box_4.setItemText(3, _translate("Form", "5"))self.s1__lb_5.setText(_translate("Form", "校验位："))self.s1__box_5.setItemText(0, _translate("Form", "N"))self.open_button.setText(_translate("Form", "打开串口"))self.close_button.setText(_translate("Form", "关闭串口"))self.s1__lb_6.setText(_translate("Form", "停止位："))self.s1__box_6.setItemText(0, _translate("Form", "1"))self.verticalGroupBox.setTitle(_translate("Form", "接受区"))self.verticalGroupBox_2.setTitle(_translate("Form", "发送区"))self.s3__send_text.setHtml(_translate("Form","<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n""<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n""p, li { white-space: pre-wrap; }\n""</style></head><body style=\" font-family:\'SimSun\'; font-size:9pt; font-weight:400; font-style:normal;\">\n""<p style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\">123456</p></body></html>"))self.s3__send_button.setText(_translate("Form", "发送"))self.s3__clear_button.setText(_translate("Form", "清除"))self.formGroupBox1.setTitle(_translate("Form", "串口状态"))self.label.setText(_translate("Form", "已接收："))self.label_2.setText(_translate("Form", "已发送："))self.hex_send.setText(_translate("Form", "Hex发送"))self.hex_receive.setText(_translate("Form", "Hex接收"))self.s2__clear_button.setText(_translate("Form", "清除"))self.timer_send_cb.setText(_translate("Form", "定时发送"))self.lineEdit_3.setText(_translate("Form", "1000"))self.dw.setText(_translate("Form", "ms/次"))
# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'demo_1.ui'
#
# Created by: PyQt5 UI code generator 5.6
#
# WARNING! All changes made in this file will be lost!from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_Form(object):def setupUi(self, Form):Form.setObjectName("Form")Form.resize(707, 458)self.formGroupBox = QtWidgets.QGroupBox(Form)self.formGroupBox.setGeometry(QtCore.QRect(20, 20, 167, 301))self.formGroupBox.setObjectName("formGroupBox")self.formLayout = QtWidgets.QFormLayout(self.formGroupBox)self.formLayout.setContentsMargins(10, 10, 10, 10)self.formLayout.setSpacing(10)self.formLayout.setObjectName("formLayout")self.s1__lb_1 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_1.setObjectName("s1__lb_1")self.formLayout.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.s1__lb_1)self.s1__box_1 = QtWidgets.QPushButton(self.formGroupBox)self.s1__box_1.setAutoRepeatInterval(100)self.s1__box_1.setDefault(True)self.s1__box_1.setObjectName("s1__box_1")self.formLayout.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.s1__box_1)self.s1__lb_2 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_2.setObjectName("s1__lb_2")self.formLayout.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.s1__lb_2)self.s1__box_2 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_2.setObjectName("s1__box_2")self.formLayout.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.s1__box_2)self.s1__lb_3 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_3.setObjectName("s1__lb_3")self.formLayout.setWidget(3, QtWidgets.QFormLayout.LabelRole, self.s1__lb_3)self.s1__box_3 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_3.setObjectName("s1__box_3")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.s1__box_3.addItem("")self.formLayout.setWidget(3, QtWidgets.QFormLayout.FieldRole, self.s1__box_3)self.s1__lb_4 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_4.setObjectName("s1__lb_4")self.formLayout.setWidget(4, QtWidgets.QFormLayout.LabelRole, self.s1__lb_4)self.s1__box_4 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_4.setObjectName("s1__box_4")self.s1__box_4.addItem("")self.s1__box_4.addItem("")self.s1__box_4.addItem("")self.s1__box_4.addItem("")self.formLayout.setWidget(4, QtWidgets.QFormLayout.FieldRole, self.s1__box_4)self.s1__lb_5 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_5.setObjectName("s1__lb_5")self.formLayout.setWidget(5, QtWidgets.QFormLayout.LabelRole, self.s1__lb_5)self.s1__box_5 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_5.setObjectName("s1__box_5")self.s1__box_5.addItem("")self.formLayout.setWidget(5, QtWidgets.QFormLayout.FieldRole, self.s1__box_5)self.open_button = QtWidgets.QPushButton(self.formGroupBox)self.open_button.setObjectName("open_button")self.formLayout.setWidget(7, QtWidgets.QFormLayout.SpanningRole, self.open_button)self.close_button = QtWidgets.QPushButton(self.formGroupBox)self.close_button.setObjectName("close_button")self.formLayout.setWidget(8, QtWidgets.QFormLayout.SpanningRole, self.close_button)self.s1__lb_6 = QtWidgets.QLabel(self.formGroupBox)self.s1__lb_6.setObjectName("s1__lb_6")self.formLayout.setWidget(6, QtWidgets.QFormLayout.LabelRole, self.s1__lb_6)self.s1__box_6 = QtWidgets.QComboBox(self.formGroupBox)self.s1__box_6.setObjectName("s1__box_6")self.s1__box_6.addItem("")self.formLayout.setWidget(6, QtWidgets.QFormLayout.FieldRole, self.s1__box_6)self.state_label = QtWidgets.QLabel(self.formGroupBox)self.state_label.setText("")self.state_label.setTextFormat(QtCore.Qt.AutoText)self.state_label.setScaledContents(True)self.state_label.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignTrailing | QtCore.Qt.AlignVCenter)self.state_label.setObjectName("state_label")self.formLayout.setWidget(2, QtWidgets.QFormLayout.SpanningRole, self.state_label)self.verticalGroupBox = QtWidgets.QGroupBox(Form)self.verticalGroupBox.setGeometry(QtCore.QRect(210, 20, 401, 241))self.verticalGroupBox.setObjectName("verticalGroupBox")self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalGroupBox)self.verticalLayout.setContentsMargins(10, 10, 10, 10)self.verticalLayout.setObjectName("verticalLayout")self.s2__receive_text = QtWidgets.QTextBrowser(self.verticalGroupBox)self.s2__receive_text.setObjectName("s2__receive_text")self.verticalLayout.addWidget(self.s2__receive_text)self.verticalGroupBox_2 = QtWidgets.QGroupBox(Form)self.verticalGroupBox_2.setGeometry(QtCore.QRect(210, 280, 401, 101))self.verticalGroupBox_2.setObjectName("verticalGroupBox_2")self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.verticalGroupBox_2)self.verticalLayout_2.setContentsMargins(10, 10, 10, 10)self.verticalLayout_2.setObjectName("verticalLayout_2")self.s3__send_text = QtWidgets.QTextEdit(self.verticalGroupBox_2)self.s3__send_text.setObjectName("s3__send_text")self.verticalLayout_2.addWidget(self.s3__send_text)self.s3__send_button = QtWidgets.QPushButton(Form)self.s3__send_button.setGeometry(QtCore.QRect(620, 310, 61, 31))self.s3__send_button.setObjectName("s3__send_button")self.s3__clear_button = QtWidgets.QPushButton(Form)self.s3__clear_button.setGeometry(QtCore.QRect(620, 350, 61, 31))self.s3__clear_button.setObjectName("s3__clear_button")self.formGroupBox1 = QtWidgets.QGroupBox(Form)self.formGroupBox1.setGeometry(QtCore.QRect(20, 340, 171, 101))self.formGroupBox1.setObjectName("formGroupBox1")self.formLayout_2 = QtWidgets.QFormLayout(self.formGroupBox1)self.formLayout_2.setContentsMargins(10, 10, 10, 10)self.formLayout_2.setSpacing(10)self.formLayout_2.setObjectName("formLayout_2")self.label = QtWidgets.QLabel(self.formGroupBox1)self.label.setObjectName("label")self.formLayout_2.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.label)self.label_2 = QtWidgets.QLabel(self.formGroupBox1)self.label_2.setObjectName("label_2")self.formLayout_2.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.label_2)self.lineEdit = QtWidgets.QLineEdit(self.formGroupBox1)self.lineEdit.setObjectName("lineEdit")self.formLayout_2.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.lineEdit)self.lineEdit_2 = QtWidgets.QLineEdit(self.formGroupBox1)self.lineEdit_2.setObjectName("lineEdit_2")self.formLayout_2.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.lineEdit_2)self.hex_send = QtWidgets.QCheckBox(Form)self.hex_send.setGeometry(QtCore.QRect(620, 280, 71, 16))self.hex_send.setObjectName("hex_send")self.hex_receive = QtWidgets.QCheckBox(Form)self.hex_receive.setGeometry(QtCore.QRect(620, 40, 71, 16))self.hex_receive.setObjectName("hex_receive")self.s2__clear_button = QtWidgets.QPushButton(Form)self.s2__clear_button.setGeometry(QtCore.QRect(620, 80, 61, 31))self.s2__clear_button.setObjectName("s2__clear_button")self.timer_send_cb = QtWidgets.QCheckBox(Form)self.timer_send_cb.setGeometry(QtCore.QRect(260, 390, 71, 16))self.timer_send_cb.setObjectName("timer_send_cb")self.lineEdit_3 = QtWidgets.QLineEdit(Form)self.lineEdit_3.setGeometry(QtCore.QRect(350, 390, 61, 20))self.lineEdit_3.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignTrailing | QtCore.Qt.AlignVCenter)self.lineEdit_3.setObjectName("lineEdit_3")self.dw = QtWidgets.QLabel(Form)self.dw.setGeometry(QtCore.QRect(420, 390, 54, 20))self.dw.setObjectName("dw")self.verticalGroupBox.raise_()self.verticalGroupBox_2.raise_()self.formGroupBox.raise_()self.s3__send_button.raise_()self.s3__clear_button.raise_()self.formGroupBox.raise_()self.hex_send.raise_()self.hex_receive.raise_()self.s2__clear_button.raise_()self.timer_send_cb.raise_()self.lineEdit_3.raise_()self.dw.raise_()self.retranslateUi(Form)QtCore.QMetaObject.connectSlotsByName(Form)def retranslateUi(self, Form):_translate = QtCore.QCoreApplication.translateForm.setWindowTitle(_translate("Form", "Form"))self.formGroupBox.setTitle(_translate("Form", "串口设置"))self.s1__lb_1.setText(_translate("Form", "串口检测："))self.s1__box_1.setText(_translate("Form", "检测串口"))self.s1__lb_2.setText(_translate("Form", "串口选择："))self.s1__lb_3.setText(_translate("Form", "波特率："))self.s1__box_3.setItemText(0, _translate("Form", "115200"))self.s1__box_3.setItemText(1, _translate("Form", "2400"))self.s1__box_3.setItemText(2, _translate("Form", "4800"))self.s1__box_3.setItemText(3, _translate("Form", "9600"))self.s1__box_3.setItemText(4, _translate("Form", "14400"))self.s1__box_3.setItemText(5, _translate("Form", "19200"))self.s1__box_3.setItemText(6, _translate("Form", "38400"))self.s1__box_3.setItemText(7, _translate("Form", "57600"))self.s1__box_3.setItemText(8, _translate("Form", "76800"))self.s1__box_3.setItemText(9, _translate("Form", "12800"))self.s1__box_3.setItemText(10, _translate("Form", "230400"))self.s1__box_3.setItemText(11, _translate("Form", "460800"))self.s1__lb_4.setText(_translate("Form", "数据位："))self.s1__box_4.setItemText(0, _translate("Form", "8"))self.s1__box_4.setItemText(1, _translate("Form", "7"))self.s1__box_4.setItemText(2, _translate("Form", "6"))self.s1__box_4.setItemText(3, _translate("Form", "5"))self.s1__lb_5.setText(_translate("Form", "校验位："))self.s1__box_5.setItemText(0, _translate("Form", "N"))self.open_button.setText(_translate("Form", "打开串口"))self.close_button.setText(_translate("Form", "关闭串口"))self.s1__lb_6.setText(_translate("Form", "停止位："))self.s1__box_6.setItemText(0, _translate("Form", "1"))self.verticalGroupBox.setTitle(_translate("Form", "接受区"))self.verticalGroupBox_2.setTitle(_translate("Form", "发送区"))self.s3__send_text.setHtml(_translate("Form","<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n""<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n""p, li { white-space: pre-wrap; }\n""</style></head><body style=\" font-family:\'SimSun\'; font-size:9pt; font-weight:400; font-style:normal;\">\n""<p style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\">123456</p></body></html>"))self.s3__send_button.setText(_translate("Form", "发送"))self.s3__clear_button.setText(_translate("Form", "清除"))self.formGroupBox1.setTitle(_translate("Form", "串口状态"))self.label.setText(_translate("Form", "已接收："))self.label_2.setText(_translate("Form", "已发送："))self.hex_send.setText(_translate("Form", "Hex发送"))self.hex_receive.setText(_translate("Form", "Hex接收"))self.s2__clear_button.setText(_translate("Form", "清除"))self.timer_send_cb.setText(_translate("Form", "定时发送"))self.lineEdit_3.setText(_translate("Form", "1000"))self.dw.setText(_translate("Form", "ms/次"))
  • pyserial_logic
import sys
import serial
import serial.tools.list_ports
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QMessageBox
from PyQt5.QtCore import QTimer
from ui_demo_1 import Ui_Formclass Pyqt5_Serial(QtWidgets.QWidget, Ui_Form):def __init__(self):super(Pyqt5_Serial, self).__init__()self.setupUi(self)self.init()self.setWindowTitle("串口小助手")self.ser = serial.Serial()self.port_check()# 接收数据和发送数据数目置零self.data_num_received = 0self.lineEdit.setText(str(self.data_num_received))self.data_num_sended = 0self.lineEdit_2.setText(str(self.data_num_sended))def init(self):# 串口检测按钮self.s1__box_1.clicked.connect(self.port_check)# 串口信息显示self.s1__box_2.currentTextChanged.connect(self.port_imf)# 打开串口按钮self.open_button.clicked.connect(self.port_open)# 关闭串口按钮self.close_button.clicked.connect(self.port_close)# 发送数据按钮self.s3__send_button.clicked.connect(self.data_send)# 定时发送数据self.timer_send = QTimer()self.timer_send.timeout.connect(self.data_send)self.timer_send_cb.stateChanged.connect(self.data_send_timer)# 定时器接收数据self.timer = QTimer(self)self.timer.timeout.connect(self.data_receive)# 清除发送窗口self.s3__clear_button.clicked.connect(self.send_data_clear)# 清除接收窗口self.s2__clear_button.clicked.connect(self.receive_data_clear)# 串口检测def port_check(self):# 检测所有存在的串口，将信息存储在字典中self.Com_Dict = {}port_list = list(serial.tools.list_ports.comports())self.s1__box_2.clear()for port in port_list:self.Com_Dict["%s" % port[0]] = "%s" % port[1]self.s1__box_2.addItem(port[0])if len(self.Com_Dict) == 0:self.state_label.setText(" 无串口")# 串口信息def port_imf(self):# 显示选定的串口的详细信息imf_s = self.s1__box_2.currentText()if imf_s != "":self.state_label.setText(self.Com_Dict[self.s1__box_2.currentText()])# 打开串口def port_open(self):self.ser.port = self.s1__box_2.currentText()self.ser.baudrate = int(self.s1__box_3.currentText())self.ser.bytesize = int(self.s1__box_4.currentText())self.ser.stopbits = int(self.s1__box_6.currentText())self.ser.parity = self.s1__box_5.currentText()try:self.ser.open()except:QMessageBox.critical(self, "Port Error", "此串口不能被打开！")return None# 打开串口接收定时器，周期为2msself.timer.start(2)if self.ser.isOpen():self.open_button.setEnabled(False)self.close_button.setEnabled(True)self.formGroupBox1.setTitle("串口状态（已开启）")# 关闭串口def port_close(self):self.timer.stop()self.timer_send.stop()try:self.ser.close()except:passself.open_button.setEnabled(True)self.close_button.setEnabled(False)self.lineEdit_3.setEnabled(True)# 接收数据和发送数据数目置零self.data_num_received = 0self.lineEdit.setText(str(self.data_num_received))self.data_num_sended = 0self.lineEdit_2.setText(str(self.data_num_sended))self.formGroupBox1.setTitle("串口状态（已关闭）")# 发送数据def data_send(self):if self.ser.isOpen():input_s = self.s3__send_text.toPlainText()if input_s != "":# 非空字符串if self.hex_send.isChecked():# hex发送input_s = input_s.strip()send_list = []while input_s != '':try:num = int(input_s[0:2], 16)except ValueError:QMessageBox.critical(self, 'wrong data', '请输入十六进制数据，以空格分开!')return Noneinput_s = input_s[2:].strip()send_list.append(num)input_s = bytes(send_list)else:# ascii发送input_s = (input_s + '\r\n').encode('utf-8')num = self.ser.write(input_s)self.data_num_sended += numself.lineEdit_2.setText(str(self.data_num_sended))else:pass# 接收数据def data_receive(self):try:num = self.ser.inWaiting()except:self.port_close()return Noneif num > 0:data = self.ser.read(num)num = len(data)# hex显示if self.hex_receive.checkState():out_s = ''for i in range(0, len(data)):out_s = out_s + '{:02X}'.format(data[i]) + ' 'self.s2__receive_text.insertPlainText(out_s)else:# 串口接收到的字符串为b'123',要转化成unicode字符串才能输出到窗口中去self.s2__receive_text.insertPlainText(data.decode('iso-8859-1'))# 统计接收字符的数量self.data_num_received += numself.lineEdit.setText(str(self.data_num_received))# 获取到text光标textCursor = self.s2__receive_text.textCursor()# 滚动到底部textCursor.movePosition(textCursor.End)# 设置光标到text中去self.s2__receive_text.setTextCursor(textCursor)else:pass# 定时发送数据def data_send_timer(self):if self.timer_send_cb.isChecked():self.timer_send.start(int(self.lineEdit_3.text()))self.lineEdit_3.setEnabled(False)else:self.timer_send.stop()self.lineEdit_3.setEnabled(True)# 清除显示def send_data_clear(self):self.s3__send_text.setText("")def receive_data_clear(self):self.s2__receive_text.setText("")if __name__ == '__main__':app = QtWidgets.QApplication(sys.argv)myshow = Pyqt5_Serial()myshow.show()sys.exit(app.exec_())

4. 驱动下载

  • 使用驱动精灵工具；
  • 推荐使用dirverIdentifier软件，会自动检测系统设备管理器上各种驱动问题，然后提供对应的驱动安装口；

5. 学习链接

  • https://github.com/Oslomayor/PyQt5-SerialPort-Stable
  • 几种串口工具

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