pyqt5界面设计串口发送数据，停止发送数据，刷新串口代码

下面是一个简单的使用PyQt5实现串口通信的界面设计代码，其中包括了发送数据、停止发送数据以及刷新串口的功能：

import sys
import serial
from PyQt5.QtCore import QIODevice, QSerialPort, QThread, pyqtSignal
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QTextEdit

class SerialThread(QThread):
    data_received = pyqtSignal(str)

    def __init__(self, port, baudrate):
        super(SerialThread, self).__init__()
        self.port = port
        self.baudrate = baudrate
        self.is_running = True

    def __del__(self):
        self.is_running = False

    def run(self):
        ser = serial.Serial(self.port, self.baudrate)
        while self.is_running:
            if ser.in_waiting:
                data = ser.readline().decode()
                self.data_received.emit(data)
        ser.close()

class MainWindow(QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle("Serial Communication")
        self.resize(600, 400)

        # Create widgets
        self.text_edit_recv = QTextEdit(self)
        self.text_edit_recv.setGeometry(10, 10, 580, 180)

        self.text_edit_send = QTextEdit(self)
        self.text_edit_send.setGeometry(10, 200, 400, 180)

        self.btn_send = QPushButton('Send', self)
        self.btn_send.setGeometry(430, 200, 80, 30)
        self.btn_send.clicked.connect(self.send_data)

        self.btn_stop = QPushButton('Stop', self)
        self.btn_stop.setGeometry(520, 200, 80, 30)
        self.btn_stop.clicked.connect(self.stop_sending)

        self.btn_refresh = QPushButton('Refresh', self)
        self.btn_refresh.setGeometry(430, 250, 170, 30)
        self.btn_refresh.clicked.connect(self.refresh_ports)

        # Initialize variables
        self.port = None
        self.baudrate = 9600
        self.serial_thread = None
        self.is_sending = False

    def send_data(self):
        if not self.is_sending:
            self.port.write(self.text_edit_send.toPlainText().encode())
            self.is_sending = True

    def stop_sending(self):
        self.is_sending = False

    def refresh_ports(self):
        port_list = [port.device for port in QSerialPortInfo.availablePorts()]
        print("Available ports:", port_list)

    def open_serial_port(self):
        if not self.port:
            port_name = "COM6"  # Replace with the actual port name
            self.port = serial.Serial(port_name, self.baudrate)
            self.serial_thread = SerialThread(port_name, self.baudrate)
            self.serial_thread.data_received.connect(self.display_data)
            self.serial_thread.start()

    def display_data(self, data):
        self.text_edit_recv.append(data)

    def closeEvent(self, event):
        if self.port:
            self.port.close()
        if self.serial_thread:
            del self.serial_thread

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

在该示例代码中，我们使用了PyQt5中的QSerialPort模块来实现串口通信。SerialThread类继承自QThread，用于在后台线程中读取串口数据；MainWindow类继承自QMainWindow，用于创建GUI界面和处理相关事件。界面中包括了一个用于显示接收数据的文本框、一个用于输入发送数据的文本框、一个用于发送数据的按钮、一个用于停止发送数据的按钮以及一个用于刷新串口的按钮。