PyQt串口助手

# -*- coding:utf-8 -*- import sys import serial import serial.tools.list_ports from PyQt5 import QtWidgets from PyQt5.QtWidgets import QDialog from PyQt5.QtWidgets import QMessageBox from PyQt5.QtCore import QTimer from PyQt5.uic import loadUi class Uart(QDialog): def __init__(self,*args): super(Uart,self).__init__(*args) loadUi('uart.ui',self) self.s1_comboBox_2.setCurrentIndex(10) self.s1_comboBox_3.setCurrentIndex(2) self.close_button.setEnabled(False) self.s5_pushButton_2.setEnabled(False) self.init() self.ser = serial.Serial() self.port_check() # 接收数据和发送数据数目置零 self.data_num_received = 0 self.s3_lineEdit_1.setText(str(self.data_num_received)) self.data_num_sended = 0 self.s3_lineEdit_2.setText(str(self.data_num_sended)) def init(self): # 串口检测按钮 self.s1_pushButton_1.clicked.connect(self.port_check) # 串口信息显示 self.s1_comboBox_1.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.s5_pushButton_2.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.s5_pushButton_3.clicked.connect(self.send_data_clear) # 清除接收窗口 self.s5_pushButton_1.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_comboBox_1.clear() for port in port_list: self.Com_Dict["%s" % port[0]] = "%s" % port[1] self.s1_comboBox_1.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_comboBox_1.currentText() if imf_s != "": self.state_label.setText(self.Com_Dict[self.s1_comboBox_1.currentText()]) # 打开串口 def port_open(self): self.ser.port = self.s1_comboBox_1.currentText() self.ser.baudrate = int(self.s1_comboBox_2.currentText()) self.ser.bytesize = int(self.s1_comboBox_3.currentText()) self.ser.stopbits = int(self.s1_comboBox_5.currentText()) self.ser.parity = self.s1_comboBox_4.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2ms self.timer.start(2) if self.ser.isOpen(): self.s5_pushButton_2.setEnabled(True) self.open_button.setEnabled(False) self.close_button.setEnabled(True) self.groupBox_3.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: pass self.open_button.setEnabled(True) self.close_button.setEnabled(False) self.s5_lineEdit.setEnabled(True) self.timer_send_cb.setChecked(False) self.s5_pushButton_2.setEnabled(False) # 接收数据和发送数据数目置零 self.data_num_received = 0 self.s3_lineEdit_1.setText(str(self.data_num_received)) self.data_num_sended = 0 self.s3_lineEdit_2.setText(str(self.data_num_sended)) self.groupBox_3.setTitle("串口状态(已关闭)") # 发送数据 def data_send(self): if self.ser.isOpen(): input_s = self.s4_lineEdit_1.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 None input_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 += num self.s3_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 None if 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_textEdit.insertPlainText(out_s + '\n') 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_textEdit.insertPlainText(data.decode('iso-8859-1')) # 统计接收字符的数量 self.data_num_received += num self.s3_lineEdit_1.setText(str(self.data_num_received)) # 获取到text光标 textCursor = self.s2_textEdit.textCursor() # 滚动到底部 textCursor.movePosition(textCursor.End) # 设置光标到text中去 self.s2_textEdit.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.s5_lineEdit.text())) self.s5_lineEdit.setEnabled(False) else: self.timer_send.stop() self.s5_lineEdit.setEnabled(True) # 清除显示 def send_data_clear(self): self.s4_lineEdit_1.setText("") def receive_data_clear(self): self.s2_textEdit.setText("")