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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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HART设备连接界面模块
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实现设备连接、断开等功能
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"""
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import serial
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import serial.tools.list_ports
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from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, QHBoxLayout, QLabel,
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QPushButton, QComboBox, QGroupBox, QFormLayout,
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QMessageBox, QSpinBox, QRadioButton)
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from PyQt5.QtCore import Qt, pyqtSignal, QThread, QSize
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from PyQt5.QtGui import QFont
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import qtawesome
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from protocol.HART import HARTCommunication, PrimaryMasterMode, SecondaryMasterMode, BurstModeON, BurstModeOFF
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class ScanDeviceThread(QThread):
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"""在后台扫描设备的线程"""
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scanCompleted = pyqtSignal(object) # 扫描完成信号，参数为找到的设备信息或None
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def __init__(self, hartComm):
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super().__init__()
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self.hartComm = hartComm
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def run(self):
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result = self.hartComm.scanForDevice()
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self.scanCompleted.emit(result)
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class HartConnectionWidget(QWidget):
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"""
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HART设备连接界面模块
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实现设备连接、断开等功能
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"""
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# 自定义信号
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connectionStatusChanged = pyqtSignal(bool) # 连接状态改变信号
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hartCommCreated = pyqtSignal(object) # HART通信对象创建信号
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def __init__(self):
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"""
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初始化连接界面
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"""
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super().__init__()
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# 初始化变量
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self.hartComm = None
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self.isConnected = False
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# 初始化界面
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self.initUI()
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# 检查COM7是否可用
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self.refreshPortList()
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def initUI(self):
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"""
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初始化用户界面
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"""
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# 创建主布局
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mainLayout = QVBoxLayout()
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mainLayout.setContentsMargins(20, 20, 20, 20)
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mainLayout.setSpacing(20)
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# 创建连接设置组
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connectionGroup = QGroupBox("串口设置")
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connectionGroup.setFont(QFont("Microsoft YaHei", 10, QFont.Bold))
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connectionLayout = QFormLayout()
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try:
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connectionLayout.setLabelAlignment(Qt.AlignRight)
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except AttributeError:
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pass # Linter may fail on this
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self.portLabel = QLabel("COM7")
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connectionLayout.addRow("串口:", self.portLabel)
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self.baudrateLabel = QLabel("1200")
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connectionLayout.addRow("波特率:", self.baudrateLabel)
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self.parityLabel = QLabel("奇校验")
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connectionLayout.addRow("校验方式:", self.parityLabel)
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self.timeoutLabel = QLabel("3 秒")
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connectionLayout.addRow("超时时间:", self.timeoutLabel)
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connectionGroup.setLayout(connectionLayout)
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mainLayout.addWidget(connectionGroup)
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# 创建地址与模式设置组
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configGroup = QGroupBox("寻址与模式")
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configGroup.setFont(QFont("Microsoft YaHei", 10, QFont.Bold))
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configLayout = QFormLayout()
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try:
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configLayout.setLabelAlignment(Qt.AlignRight)
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except AttributeError:
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pass # Linter may fail on this
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# 寻址方式
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addressingLayout = QHBoxLayout()
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self.rbSpecificAddress = QRadioButton("指定短地址")
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self.rbSpecificAddress.setChecked(True)
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self.rbScanAddress = QRadioButton("扫描设备(轮询)")
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addressingLayout.addWidget(self.rbSpecificAddress)
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addressingLayout.addWidget(self.rbScanAddress)
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configLayout.addRow("寻址方式:", addressingLayout)
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# 短地址输入
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self.pollingAddressSpinBox = QSpinBox()
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self.pollingAddressSpinBox.setRange(0, 63)
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configLayout.addRow("轮询地址:", self.pollingAddressSpinBox)
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# 主站模式
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self.masterModeCombo = QComboBox()
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self.masterModeCombo.addItems(["主要主站", "次要主站"])
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configLayout.addRow("主站模式:", self.masterModeCombo)
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# 突发模式
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self.burstModeCombo = QComboBox()
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self.burstModeCombo.addItems(["关闭", "开启"])
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configLayout.addRow("突发模式:", self.burstModeCombo)
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configGroup.setLayout(configLayout)
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mainLayout.addWidget(configGroup)
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# 创建按钮布局
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buttonLayout = QHBoxLayout()
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buttonLayout.setSpacing(10)
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# 连接/扫描按钮
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self.connectButton = QPushButton("连接设备")
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self.connectButton.setObjectName("startProtocolBtn")
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self.connectButton.setIcon(qtawesome.icon('fa5s.play-circle', color='#047857'))
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self.connectButton.setIconSize(QSize(22, 22))
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self.connectButton.clicked.connect(self.connectDevice)
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self.scanButton = QPushButton("扫描设备")
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self.scanButton.setObjectName("forceBtn") # Yellow style for scanning
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self.scanButton.setIcon(qtawesome.icon('fa5s.search', color='#D97706'))
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self.scanButton.setIconSize(QSize(22, 22))
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self.scanButton.clicked.connect(self.scanDevice)
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self.scanButton.setVisible(False) # 默认隐藏
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buttonLayout.addWidget(self.connectButton)
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buttonLayout.addWidget(self.scanButton)
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# 信号连接
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self.rbSpecificAddress.toggled.connect(self.updateAddressingMode)
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# 断开按钮
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self.disconnectButton = QPushButton("断开连接")
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self.disconnectButton.setObjectName("delBtn") # Red style
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self.disconnectButton.setIcon(qtawesome.icon('fa5s.stop-circle', color='#B91C1C'))
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self.disconnectButton.setIconSize(QSize(22, 22))
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self.disconnectButton.clicked.connect(self.disconnectDevice)
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self.disconnectButton.setEnabled(False)
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buttonLayout.addWidget(self.disconnectButton)
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mainLayout.addLayout(buttonLayout)
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# 添加状态标签
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self.statusLabel = QLabel("未连接")
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try:
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self.statusLabel.setAlignment(Qt.AlignCenter)
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except AttributeError:
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pass # Linter may fail on this
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self.statusLabel.setFont(QFont("Microsoft YaHei", 10))
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self.statusLabel.setStyleSheet("color: red;")
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mainLayout.addWidget(self.statusLabel)
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# 添加弹性空间
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mainLayout.addStretch(1)
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# 设置主布局
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self.setLayout(mainLayout)
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def refreshPortList(self):
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"""
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刷新串口列表（仅检查COM7是否可用）
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"""
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ports = [port.device for port in serial.tools.list_ports.comports()]
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# 检查COM7是否可用
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if "COM7" in ports:
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self.connectButton.setEnabled(True)
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self.statusLabel.setText("未连接")
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else:
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self.connectButton.setEnabled(False)
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self.statusLabel.setText("未检测到COM7串口设备")
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def updateAddressingMode(self, checked):
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is_specific = self.rbSpecificAddress.isChecked()
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self.pollingAddressSpinBox.setEnabled(is_specific)
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self.connectButton.setVisible(is_specific)
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self.scanButton.setVisible(not is_specific)
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def scanDevice(self):
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"""开始扫描设备"""
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if self.isConnected:
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QMessageBox.information(self, "提示", "设备已连接。如需重新扫描，请先断开连接。")
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return
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if not self._ensure_serial_connection():
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return
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self.scanButton.setEnabled(False)
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self.scanButton.setText("扫描中...")
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self.statusLabel.setText("正在扫描设备 (0-63)...")
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self.statusLabel.setStyleSheet("color: orange;")
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self.scanThread = ScanDeviceThread(self.hartComm)
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self.scanThread.scanCompleted.connect(self.onScanCompleted)
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self.scanThread.start()
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def onScanCompleted(self, result):
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"""扫描完成后的处理"""
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self.scanButton.setEnabled(True)
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self.scanButton.setText("扫描设备")
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if result and 'address' in result:
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found_addr = result['address']
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QMessageBox.information(self, "扫描成功", f"在轮询地址 {found_addr} 找到设备！\n已自动配置为该地址。")
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self.pollingAddressSpinBox.setValue(found_addr)
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self.rbSpecificAddress.setChecked(True) # 切换回指定地址模式
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# 自动连接
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self.connectDevice()
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else:
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QMessageBox.warning(self, "扫描失败", "未在任何轮询地址 (0-63) 找到设备。")
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self.statusLabel.setText("扫描完成，未找到设备")
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self.statusLabel.setStyleSheet("color: orange;")
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def _ensure_serial_connection(self):
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"""确保串口已连接并创建HART对象"""
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if self.hartComm and self.hartComm.isConnected():
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return True
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if self.hartComm:
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self.hartComm.disconnect()
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port = "COM7"
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baudrate = 1200
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timeout = 3
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parity = serial.PARITY_ODD
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try:
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self.hartComm = HARTCommunication(port=port, baudrate=baudrate, parity=parity, timeout=timeout)
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if self.hartComm.connect():
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self.hartCommCreated.emit(self.hartComm)
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return True
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else:
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self.hartComm = None
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QMessageBox.critical(self, "连接失败", "无法打开COM7串口，请检查设备连接。")
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return False
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except Exception as e:
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self.hartComm = None
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QMessageBox.critical(self, "连接错误", f"连接过程中发生错误：{str(e)}")
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return False
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def connectDevice(self):
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"""使用指定配置连接设备并验证"""
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if self.isConnected:
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QMessageBox.information(self, "提示", "设备已连接。如需更换地址或模式，请先断开连接。")
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return
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if not self._ensure_serial_connection() or not self.hartComm:
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return
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try:
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# 应用界面上的配置
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is_primary = self.masterModeCombo.currentIndex() == 0
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self.hartComm.setMasterMode(isPrimaryMaster=is_primary)
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is_burst_on = self.burstModeCombo.currentIndex() == 1
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self.hartComm.setBurstMode(enable=is_burst_on)
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polling_address = self.pollingAddressSpinBox.value()
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self.hartComm.buildHartAddress(pollingAddress=polling_address, isLongFrame=False)
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self.statusLabel.setText(f"正在验证地址 {polling_address}...")
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self.statusLabel.setStyleSheet("color: orange;")
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app_instance = QApplication.instance()
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if app_instance:
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app_instance.processEvents()
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# 验证设备通信
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device_info = self.hartComm.readUniqueId()
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if isinstance(device_info, list) and device_info:
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self.isConnected = True
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self.statusLabel.setText(f"已连接 (地址: {polling_address})")
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self.statusLabel.setStyleSheet("color: green;")
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self.disconnectButton.setEnabled(True)
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self.connectButton.setEnabled(False)
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self.scanButton.setVisible(False)
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self._set_config_controls_enabled(False)
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self.connectionStatusChanged.emit(True)
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QMessageBox.information(self, "连接成功", f"成功连接到地址为 {polling_address} 的设备。")
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else:
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# self.isConnected remains False
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self.statusLabel.setText("连接失败")
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self.statusLabel.setStyleSheet("color: red;")
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self.connectionStatusChanged.emit(False)
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QMessageBox.critical(self, "连接失败", f"在地址 {polling_address} 未找到设备或设备无响应。")
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# 保持串口打开，允许用户尝试其他地址, 但需要一个断开按钮
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self.disconnectButton.setEnabled(True)
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except Exception as e:
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self.isConnected = False
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self.statusLabel.setText("连接错误")
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self.statusLabel.setStyleSheet("color: red;")
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self.connectionStatusChanged.emit(False)
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QMessageBox.critical(self, "配置错误", f"应用配置时发生错误：{str(e)}")
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def disconnectDevice(self, silent=False):
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"""
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断开设备连接
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"""
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try:
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if self.hartComm:
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self.hartComm.disconnect()
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self.isConnected = False
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self.statusLabel.setText("未连接")
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self.statusLabel.setStyleSheet("color: red;")
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self.disconnectButton.setEnabled(False)
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self.connectButton.setEnabled(True)
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self._set_config_controls_enabled(True)
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self.updateAddressingMode(self.rbSpecificAddress.isChecked())
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self.connectionStatusChanged.emit(False)
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if not silent:
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QMessageBox.information(self, "断开连接", "已成功断开设备连接！")
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except Exception as e:
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if not silent:
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QMessageBox.warning(self, "断开连接错误", f"断开连接过程中发生错误：{str(e)}")
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# 恢复UI到断开状态
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self.isConnected = False
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self.statusLabel.setText("未连接")
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self.statusLabel.setStyleSheet("color: red;")
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self.disconnectButton.setEnabled(False)
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self.connectButton.setEnabled(True)
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self._set_config_controls_enabled(True)
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self.connectionStatusChanged.emit(False)
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def _set_config_controls_enabled(self, enabled):
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"""启用或禁用配置相关的控件"""
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self.pollingAddressSpinBox.setEnabled(enabled)
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self.masterModeCombo.setEnabled(enabled)
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self.burstModeCombo.setEnabled(enabled)
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self.rbSpecificAddress.setEnabled(enabled)
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self.rbScanAddress.setEnabled(enabled)
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def updatePollingAddress(self, new_address):
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"""
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从外部更新轮询地址的UI显示
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"""
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self.pollingAddressSpinBox.setValue(new_address)
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if self.isConnected:
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self.statusLabel.setText(f"已连接 (地址: {new_address})") |