Question

只有当我的应用程序从串行端口接收数据时，我才遇到调用我的方法之一的问题。

我熟悉信号和插槽的概念，但一般情况下会返回错误。

这是我的尝试：

from PyQt5 import uic
from PyQt5.QtWidgets import QWidget, QApplication
import sys
from PyQt5.QtSerialPort import QSerialPort
from PyQt5.QtCore import QIODevice, QObject, pyqtSignal

class MyWindow(QWidget):
    def __init__(self, parent=None):
        QWidget.__init__(self)
        uic.loadUi("widget.ui", self)

        self.lcdNumber.display(24)
        self.pushButton_2.setAutoRepeat(True)

        # "general" approach, which works exellent
        self.pushButton_2.pressed.connect(self.slider_one_plus)
        self.serial = QSerialPort(self)

        # how can I connect signal readyRead() to my slot do_after_data_recieved   
        # self.connect(???)
        # QIODevice.readyRead(self).connect(???)

    def do_after_data_recieved(self):
        print('Data has been recieved!')

def configure_serial_ports_parameters(self):
    PORT = 'COM3'

    self.serial.setPortName(port=PORT)
    if self.serial.open(QIODevice.ReadWrite):
        self.serial.setBaudRate(115200)
        self.serial.readyRead.connect(self.on_serial_read)
        # clear the text
        self.clear()
        # Send a Control-C
        self.serial.write(b'\x03')
    else:
        print("Cannot connect to device on port {}".format(PORT))
        raise IOError("Cannot connect to device on port {}".format(PORT))

据我了解，readyReady信号是从QIODevice继承的，我需要某种方式从我在代码中实现的QIODevice发出信号，但是如何将信号readyRead（）连接到插槽do_after_data_recieved？

操作系统-我认为并不重要，但就我而言，它是Windows 8.1 Python 3.7 库-PyQt5

任何帮助将不胜感激，谢谢！

PyQt5 QSerialPort readyread信号

0 个答案: