用pyqt5写一个能显示获取的串口CMO7的界面

好的，下面是一个用 PyQt5 编写的串口监控界面的示例代码。需要安装 pyserial 库和 PyQt5 库。

import sys
import serial
from PyQt5 import QtCore, QtWidgets

class SerialMonitor(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()

        self.serial_port = serial.Serial()
        self.serial_port.baudrate = 9600
        self.serial_port.timeout = 0.1

        layout = QtWidgets.QVBoxLayout()
        self.setLayout(layout)

        self.open_button = QtWidgets.QPushButton('Open')
        self.open_button.clicked.connect(self.open_serial_port)
        layout.addWidget(self.open_button)

        self.close_button = QtWidgets.QPushButton('Close')
        self.close_button.setEnabled(False)
        self.close_button.clicked.connect(self.close_serial_port)
        layout.addWidget(self.close_button)

        self.text_edit = QtWidgets.QTextEdit()
        self.text_edit.setReadOnly(True)
        layout.addWidget(self.text_edit)

        self.serial_timer = QtCore.QTimer()
        self.serial_timer.timeout.connect(self.read_serial_data)

    def open_serial_port(self):
        port_name = 'COM7'  # Replace with your serial port name
        try:
            self.serial_port.port = port_name
            self.serial_port.open()
        except serial.SerialException as e:
            QtWidgets.QMessageBox.critical(self, 'Error', str(e))
            return
        self.open_button.setEnabled(False)
        self.close_button.setEnabled(True)
        self.serial_timer.start(100)

    def close_serial_port(self):
        self.serial_timer.stop()
        self.serial_port.close()
        self.open_button.setEnabled(True)
        self.close_button.setEnabled(False)

    def read_serial_data(self):
        while self.serial_port.in_waiting > 0:
            data = self.serial_port.read(1)
            self.text_edit.insertPlainText(data.decode())

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

你可以根据自己的需求修改代码中的串口名称、波特率等参数。