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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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HART变量信息显示界面模块
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实现主变量、第二变量、回路电流等动态数据的读取与显示
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"""
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from PyQt5.QtWidgets import (QWidget, QVBoxLayout, QHBoxLayout, QLabel,
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QPushButton, QGroupBox, QFormLayout, QTextEdit,
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QMessageBox, QProgressBar, QSplitter)
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from PyQt5.QtCore import Qt, QThread, pyqtSignal
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from PyQt5.QtGui import QFont, QTextCursor
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from protocol.HART import common
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class ReadVariableThread(QThread):
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"""读取单个变量信息的线程类"""
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infoReceived = pyqtSignal(dict, str) # 信号发送(响应字典, 命令类型)
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errorOccurred = pyqtSignal(str, str)
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def __init__(self, hartComm, command_name):
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super().__init__()
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self.hartComm = hartComm
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self.command_name = command_name
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self._is_running = True
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def stop(self):
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self._is_running = False
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def run(self):
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try:
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if not self.hartComm:
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raise Exception("HART通信对象未初始化")
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func = getattr(self.hartComm, self.command_name, None)
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if not func:
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raise Exception(f"未找到名为 {self.command_name} 的通信方法")
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response = func()
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if self._is_running:
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msg = response[0] if isinstance(response, list) and response else response
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# print(msg)
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if msg and isinstance(msg, dict):
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if msg.get("status") != "fail":
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self.infoReceived.emit(msg, self.command_name)
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else:
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error_msg = msg.get("error", "未知错误")
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self.errorOccurred.emit(f"命令 {self.command_name} 执行失败: {error_msg}", self.command_name)
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else:
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self.errorOccurred.emit(f"收到无效响应: {response}", self.command_name)
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except Exception as e:
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self.errorOccurred.emit(str(e), self.command_name)
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class HartVariableInfoWidget(QWidget):
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"""HART变量信息显示界面"""
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def __init__(self, parent=None):
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super().__init__(parent)
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self.hartComm = None
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self.readThreads = {}
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self.initUI()
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def initUI(self):
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mainLayout = QVBoxLayout(self)
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topLayout = QHBoxLayout()
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# --- Command 1 Group ---
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cmd1Group = QGroupBox("主变量 (Command 1)")
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cmd1Layout = QFormLayout()
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self.pvLabel = QLabel("--")
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self.pvUnitLabel = QLabel("--")
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cmd1Layout.addRow("主变量值:", self.pvLabel)
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cmd1Layout.addRow("单位:", self.pvUnitLabel)
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self.readCmd1Button = QPushButton("读取")
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self.readCmd1Button.clicked.connect(lambda: self.readVariableInfo('readPrimaryVariable'))
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cmd1Layout.addRow(self.readCmd1Button)
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cmd1Group.setLayout(cmd1Layout)
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# --- Command 2 Group ---
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cmd2Group = QGroupBox("回路电流和百分比 (Command 2)")
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cmd2Layout = QFormLayout()
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self.loopCurrentLabel_cmd2 = QLabel("--")
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self.percentRangeLabel = QLabel("--")
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cmd2Layout.addRow("回路电流:", self.loopCurrentLabel_cmd2)
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cmd2Layout.addRow("量程百分比:", self.percentRangeLabel)
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self.readCmd2Button = QPushButton("读取")
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self.readCmd2Button.clicked.connect(lambda: self.readVariableInfo('readLoopCurrentAndPercent'))
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cmd2Layout.addRow(self.readCmd2Button)
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cmd2Group.setLayout(cmd2Layout)
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# --- Command 3 Group ---
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cmd3Group = QGroupBox("动态变量和回路电流 (Command 3)")
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cmd3Layout = QFormLayout()
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self.loopCurrentLabel_cmd3 = QLabel("--")
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self.pv_cmd3_Label = QLabel("--")
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self.pv_cmd3_UnitLabel = QLabel("--")
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self.sv_cmd3_Label = QLabel("--")
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self.sv_cmd3_UnitLabel = QLabel("--")
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self.tv_cmd3_Label = QLabel("--")
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self.tv_cmd3_UnitLabel = QLabel("--")
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self.qv_cmd3_Label = QLabel("--")
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self.qv_cmd3_UnitLabel = QLabel("--")
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cmd3Layout.addRow("回路电流:", self.loopCurrentLabel_cmd3)
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cmd3Layout.addRow("主变量:", self.pv_cmd3_Label)
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cmd3Layout.addRow("主变量单位:", self.pv_cmd3_UnitLabel)
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cmd3Layout.addRow("第二变量:", self.sv_cmd3_Label)
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cmd3Layout.addRow("第二变量单位:", self.sv_cmd3_UnitLabel)
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cmd3Layout.addRow("第三变量:", self.tv_cmd3_Label)
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cmd3Layout.addRow("第三变量单位:", self.tv_cmd3_UnitLabel)
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cmd3Layout.addRow("第四变量:", self.qv_cmd3_Label)
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cmd3Layout.addRow("第四变量单位:", self.qv_cmd3_UnitLabel)
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self.readCmd3Button = QPushButton("读取")
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self.readCmd3Button.clicked.connect(lambda: self.readVariableInfo('readDynamicVariablesAndLoopCurrent'))
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cmd3Layout.addRow(self.readCmd3Button)
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cmd3Group.setLayout(cmd3Layout)
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topLayout.addWidget(cmd1Group)
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topLayout.addWidget(cmd2Group)
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topLayout.addWidget(cmd3Group)
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mainLayout.addLayout(topLayout)
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# --- Raw Data Group ---
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rawDataGroup = QGroupBox("原始数据")
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rawDataLayout = QVBoxLayout()
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self.rawDataText = QTextEdit()
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self.rawDataText.setReadOnly(True)
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self.rawDataText.setFont(QFont("Consolas", 9))
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self.rawDataText.setLineWrapMode(QTextEdit.NoWrap)
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rawDataLayout.addWidget(self.rawDataText)
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rawDataGroup.setLayout(rawDataLayout)
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mainLayout.addWidget(rawDataGroup)
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# --- Global Controls ---
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controlLayout = QHBoxLayout()
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self.clearButton = QPushButton("清除所有显示")
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self.clearButton.clicked.connect(self.clearAllDisplays)
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controlLayout.addStretch()
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controlLayout.addWidget(self.clearButton)
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mainLayout.addLayout(controlLayout)
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self.setHartComm(None) # Disable buttons initially
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def setHartComm(self, hartComm):
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self.hartComm = hartComm
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is_connected = hartComm is not None
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self.readCmd1Button.setEnabled(is_connected)
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self.readCmd2Button.setEnabled(is_connected)
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self.readCmd3Button.setEnabled(is_connected)
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def readVariableInfo(self, command_name):
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if not self.hartComm:
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QMessageBox.warning(self, "警告", "未连接到HART设备！")
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return
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if command_name in self.readThreads and self.readThreads[command_name].isRunning():
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self.readThreads[command_name].stop()
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self.readThreads[command_name].wait()
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thread = ReadVariableThread(self.hartComm, command_name)
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thread.infoReceived.connect(self.updateVariableInfo)
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thread.errorOccurred.connect(self.handleError)
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thread.finished.connect(lambda: self.onReadFinished(command_name))
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self.readThreads[command_name] = thread
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button = self.getButtonForCommand(command_name)
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if button:
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button.setText("读取中...")
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button.setEnabled(False)
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thread.start()
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def updateVariableInfo(self, msg, command_name):
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self.appendRawData(msg)
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if command_name == 'readPrimaryVariable':
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pv = msg.get('primary_variable')
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unit_code = msg.get('primary_variable_units')
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self.pvLabel.setText(f"{pv:.4f}" if pv is not None else "--")
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self.pvUnitLabel.setText(common.get_unit_description(unit_code))
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elif command_name == 'readLoopCurrentAndPercent':
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current = msg.get('analog_signal')
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percent = msg.get('primary_variable')
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self.loopCurrentLabel_cmd2.setText(f"{current:.4f} mA" if current is not None else "--")
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self.percentRangeLabel.setText(f"{percent:.2f} %" if percent is not None else "--")
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elif command_name == 'readDynamicVariablesAndLoopCurrent':
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current = msg.get('analog_signal')
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self.loopCurrentLabel_cmd3.setText(f"{current:.4f} mA" if current is not None else "--")
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pv = msg.get('primary_variable')
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pv_unit = msg.get('primary_variable_units')
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self.pv_cmd3_Label.setText(f"{pv:.4f}" if pv is not None else "--")
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self.pv_cmd3_UnitLabel.setText(common.get_unit_description(pv_unit))
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sv = msg.get('secondary_variable')
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sv_unit = msg.get('secondary_variable_units')
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self.sv_cmd3_Label.setText(f"{sv:.4f}" if sv is not None else "--")
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self.sv_cmd3_UnitLabel.setText(common.get_unit_description(sv_unit))
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tv = msg.get('tertiary_variable')
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tv_unit = msg.get('tertiary_variable_units')
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self.tv_cmd3_Label.setText(f"{tv:.4f}" if tv is not None else "--")
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self.tv_cmd3_UnitLabel.setText(common.get_unit_description(tv_unit))
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qv = msg.get('quaternary_variable')
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qv_unit = msg.get('quaternary_variable_units')
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self.qv_cmd3_Label.setText(f"{qv:.4f}" if qv is not None else "--")
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self.qv_cmd3_UnitLabel.setText(common.get_unit_description(qv_unit))
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def appendRawData(self, msg):
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# self.rawDataText.append(\"--- 接收到的报文: {msg.get('command_name', 'N/A')} ---\")
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for key, value in msg.items():
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if isinstance(value, bytes):
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value_str = ' '.join(f'{b:02x}' for b in value)
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self.rawDataText.append(f"{key}: {value_str} (hex)")
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else:
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self.rawDataText.append(f"{key}: {value}")
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self.rawDataText.append("\\n")
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self.rawDataText.moveCursor(QTextCursor.End)
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def handleError(self, errorMsg, command_name):
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QMessageBox.critical(self, "错误", f"执行 {command_name} 时出错:\\n{errorMsg}")
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def onReadFinished(self, command_name):
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button = self.getButtonForCommand(command_name)
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if button:
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button.setText("读取")
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button.setEnabled(self.hartComm is not None)
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def getButtonForCommand(self, command_name):
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if command_name == 'readPrimaryVariable':
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return self.readCmd1Button
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elif command_name == 'readLoopCurrentAndPercent':
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return self.readCmd2Button
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elif command_name == 'readDynamicVariablesAndLoopCurrent':
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return self.readCmd3Button
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return None
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def clearAllDisplays(self):
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# Cmd 1
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self.pvLabel.setText("--")
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self.pvUnitLabel.setText("--")
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# Cmd 2
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self.loopCurrentLabel_cmd2.setText("--")
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self.percentRangeLabel.setText("--")
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# Cmd 3
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self.loopCurrentLabel_cmd3.setText("--")
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self.pv_cmd3_Label.setText("--")
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self.pv_cmd3_UnitLabel.setText("--")
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self.sv_cmd3_Label.setText("--")
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self.sv_cmd3_UnitLabel.setText("--")
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self.tv_cmd3_Label.setText("--")
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self.tv_cmd3_UnitLabel.setText("--")
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self.qv_cmd3_Label.setText("--")
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self.qv_cmd3_UnitLabel.setText("--")
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self.rawDataText.clear()
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