class AQMain(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        # TODO: figure out way to configure for different comm types (TCP, MAVLINK, etc) 
        self.comm = AQSerial()
        
        # Default main window conditions
        self.ui.buttonDisconnect.setEnabled(False)
        self.ui.buttonConnect.setEnabled(True)
        self.ui.comPort.setEnabled(True)
        self.ui.baudRate.setEnabled(True)
        self.ui.status.setText("Not connected to the AeroQuad")
        self.availablePorts = []
        self.updateComPortSelection()
        self.updateBaudRates()
        
        # Update comm port combo box to use last used comm port
        defaultComPort = xml.find("./Settings/DefaultComPort").text
        commIndex = self.ui.comPort.findText(defaultComPort)
        if commIndex == -1:
            commIndex = 0
        self.ui.comPort.setCurrentIndex(commIndex)
        
        # Load splash screen
        self.subPanel = Ui_splashScreen()
        self.subPanel.setupUi(self.subPanel)
        self.ui.subPanel.addWidget(self.subPanel)
        
        # Dynamically configure board type menu and subPanel menu from XML configuration file
        self.selectedBoardType = self.configureBoardTypeMenu()
        self.configureSubPanelMenu(self.selectedBoardType)
        self.activeSubPanel = None

        # Connect GUI slots and signals
        self.ui.buttonConnect.clicked.connect(self.connect)
        self.ui.buttonDisconnect.clicked.connect(self.disconnect)
        self.ui.actionExit.triggered.connect(QtGui.qApp.quit)
        self.ui.comPort.currentIndexChanged.connect(self.updateDetectedPorts)
        self.ui.actionBootUpDelay.triggered.connect(self.updateBootUpDelay)
        self.ui.actionCommTimeout.triggered.connect(self.updateCommTimeOut)


    '''Communication Methods'''        
    def connect(self):
        '''Initiates communication with the AeroQuad'''
        # Setup GUI
        self.ui.status.setText("Connecting to the " + self.selectedBoardType + "...")
        self.ui.buttonDisconnect.setEnabled(True)
        self.ui.buttonConnect.setEnabled(False)
        self.ui.comPort.setEnabled(False)
        self.ui.baudRate.setEnabled(False)
        # Update the GUI
        app.processEvents()
        
        # Setup serial port
        bootupDelay = float(xml.find("./Settings/BootUpDelay").text)
        commTimeOut = float(xml.find("./Settings/CommTimeOut").text)
        self.comm.connect(str(self.ui.comPort.currentText()), int(self.ui.baudRate.currentText()), bootupDelay, commTimeOut)
        self.comm.write("!")
        version = self.comm.read()
        if version != "":
            self.storeComPortSelection()
            self.ui.status.setText("Connected to the " + self.selectedBoardType + " using Flight Software v" + version)
            self.restartSubPanel()
        else:
            self.disconnect()
            self.ui.status.setText("Not connected to the " + self.selectedBoardType)
        
    def disconnect(self):
        '''Disconnect from the AeroQuad'''
        self.comm.write("X")
        self.comm.disconnect()
        # Update GUI
        self.ui.buttonDisconnect.setEnabled(False)
        self.ui.buttonConnect.setEnabled(True)
        self.ui.comPort.setEnabled(True)
        self.ui.baudRate.setEnabled(True)
        self.ui.status.setText("Disconnected from the " + self.selectedBoardType)
        self.restartSubPanel()

    def updateDetectedPorts(self):
        '''Cycles through 256 ports and checks if there is a response from them.'''
        selection = self.ui.comPort.currentText()
        if selection == "Refresh":
            self.updateComPortSelection
            self.ui.comPort.setCurrentIndex(0)
            self.ui.status.setText("Updated list of available COM ports")
        elif selection == "Autoconnect":
            self.ui.comPort.setCurrentIndex(0)
            self.ui.status.setText("This feature still under construction")
        elif selection == "-------":
            self.ui.comPort.setCurrentIndex(0)
    
    def updateBootUpDelay(self):
        '''Creates dialog box to ask user for desired boot up delay.
        This delay waits for Arduino based boards to finish booting up before sending commands.
        '''
        bootUpDelay = float(xml.find("./Settings/BootUpDelay").text)
        data, ok = QtGui.QInputDialog.getDouble(self, "Boot Up Delay", "Boot Up Delay:", bootUpDelay, 0, 60, 3)
        if ok:
            xml.find("./Settings/BootUpDelay").text = str(data)
            xml.write("AeroQuadConfigurator.xml")
 
    def updateCommTimeOut(self):
        '''Creates dialog box to ask user for desired comm timeout.
        This is timeout value used by serial drivers to wait for response from device
        '''
        commTimeOut = float(xml.find("./Settings/CommTimeOut").text)
        data, ok = QtGui.QInputDialog.getDouble(self, "Comm Time Out", "Comm Time Out:", commTimeOut, 0, 60, 3)
        if ok:
            xml.find("./Settings/CommTimeOut").text = str(data)
            xml.write("AeroQuadConfigurator.xml")

    def updateComPortSelection(self):
        '''Look for available comm ports and updates combo box'''
        self.ui.comPort.clear()
        for n in self.comm.detectPorts():
            self.ui.comPort.addItem(n)
        self.ui.comPort.addItem("-------")
        self.ui.comPort.addItem("Autoconnect")
        self.ui.comPort.addItem("Refresh")
        
    def storeComPortSelection(self):
        '''Stores comm port selection to xml file for later recall'''
        xml.find("./Settings/DefaultBaudRate").text = str(self.ui.baudRate.currentText())
        xml.find("./Settings/DefaultComPort").text = str(self.ui.comPort.currentText())
        xml.write("AeroQuadConfigurator.xml")
               
    def updateBaudRates(self):
        '''Reads baud rates from xml and displays in combo box.
        Updates the xml file to display different baud rates
        '''
        defaultBaudRate = xml.find("./Settings/DefaultBaudRate").text
        baudRates = xml.find("./Settings/AvailableBaudRates").text
        baudRate = baudRates.split(',')
        for i in baudRate:
            self.ui.baudRate.addItem(i)
        self.ui.baudRate.setCurrentIndex(baudRate.index(defaultBaudRate))     
 
    
    '''Board Selection Methods'''            
    def configureBoardTypeMenu(self):
        '''Dynamically add board types to menu bar'''
        boardNames = xml.findall("./Boards/Type")
        self.boardTypes = []
        self.boardMenu = []
        for board in boardNames:
            self.boardTypes.append(board.text)
        self.boardTypeMapper = QtCore.QSignalMapper(self)
        for boardType in self.boardTypes:
            self.ui.board = self.ui.menuBoard.addAction(boardType)
            self.boardMenu.append(self.ui.board) # Need to store this separately because Python only binds stuff at runtime
            self.boardTypeMapper.setMapping(self.ui.board, boardType)
            self.ui.board.triggered.connect(self.boardTypeMapper.map)
            self.ui.board.setCheckable(True)
        self.boardTypeMapper.mapped[str].connect(self.selectBoardType)
        selectedBoardType = xml.find("./Boards/Selected").text
        self.checkmarkBoardType(selectedBoardType)
        return selectedBoardType

    def selectBoardType(self, boardType):
        '''Places check mark beside selected board type
        Menu item instances stored in dedicated list because Python only updates during runtime making everything point to the last item in the list
        '''
        types = len(self.boardTypes)
        for name in range(types):
            self.boardMenu[name].setChecked(False)
        self.checkmarkBoardType(boardType)
        selected = self.boardTypes.index(boardType)
        self.boardMenu[selected].setChecked(True)
        xml.find("./Boards/Selected").text = str(boardType)
        xml.write("AeroQuadConfigurator.xml")
        self.selectedBoardType = boardType
        self.clearSubPanelMenu()
        self.configureSubPanelMenu(boardType)
        self.ui.subPanel.setCurrentIndex(0)

    def checkmarkBoardType(self, boardType):
        '''Place checkmark next to selected board type'''
        selected = self.boardTypes.index(boardType)
        self.boardMenu[selected].setChecked(True)

  
    ''' SubPanel Methods '''
    def configureSubPanelMenu(self, boardType):
        '''Dynamically add subpanels to View menu based on selected board type'''
        boardSubPanelName = "./Board/[@Type='" + str(boardType) + "']/Subpanels/Subpanel"
        subPanels = xml.findall(boardSubPanelName)
        subPanelCount = 1
        self.subPanelList = []
        self.subPanelClasses = []
        for subPanel in subPanels:
            self.subPanelList.append(subPanel.get("Name"))
            pathName = xml.find(boardSubPanelName + "/[@Name='" + subPanel.get("Name") +"']/Path").text
            className = xml.find(boardSubPanelName + "/[@Name='" + subPanel.get("Name") +"']/Class").text
            packageList = pathName.split('.')
            packageString = packageList[0] + '.' + packageList[1]
            module = __import__(packageString)
            for package in packageList[1:]:
                module = getattr(module, package)
            module = getattr(module, className)
            tempSubPanel = module()
            tempSubPanel.setupUi(tempSubPanel, self.comm)
            self.ui.subPanel.addWidget(tempSubPanel)
            self.subPanelClasses.append(tempSubPanel)
            subPanelCount += 1
            
        self.subPanelMapper = QtCore.QSignalMapper(self)
        self.subPanelMenu = []
        for subPanelName in self.subPanelList:
            subPanel = self.ui.menuView.addAction(subPanelName)
            self.subPanelMenu.append(subPanel) # Need to store this separately because Python only binds stuff at runtime
            self.subPanelMapper.setMapping(subPanel, subPanelName)
            subPanel.triggered.connect(self.subPanelMapper.map)
            subPanel.setCheckable(True)
        self.subPanelMapper.mapped[str].connect(self.selectSubPanel)
  
    def selectSubPanel(self, subPanelName):
        '''Places check mark beside selected subpanel name
        Menu item instances stored in dedicated list because Python only updates during runtime making everything point to the last item in the list
        '''
        if self.activeSubPanel != None:
            self.activeSubPanel.stop()
        types = len(self.subPanelList)
        for index in range(types):
            self.subPanelMenu[index].setChecked(False)
        selected = self.subPanelList.index(subPanelName)
        self.subPanelMenu[selected].setChecked(True)
        self.ui.subPanel.setCurrentIndex(selected+1) # index 0 is splash screen
        self.activeSubPanel = self.subPanelClasses[selected]
        self.activeSubPanel.start()
        
    def clearSubPanelMenu(self):
        ''' Clear subPanel menu and disconnect subPanel related signals'''
        self.ui.menuView.clear()
        self.subPanelMapper.mapped[str].disconnect(self.selectSubPanel)
        
    def restartSubPanel(self):
        if self.activeSubPanel != None: # Restart any running subpanels
            self.activeSubPanel.stop()
            self.activeSubPanel.start()
            
    ''' Housekeeping Functions'''
    def exit(self):
        self.comm.disconnect()
        sys.exit(app.exec_())
Esempio n. 2
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class AQMain(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        # TODO: figure out way to configure for different comm types (TCP, MAVLINK, etc) 
        self.comm = AQSerial()
        
        # Default main window conditions
        self.ui.buttonDisconnect.setEnabled(False)
        self.ui.buttonConnect.setEnabled(True)
        self.ui.comPort.setEnabled(True)
        self.ui.baudRate.setEnabled(True)
        self.ui.status.setText("Not connected to the AeroQuad")
        self.availablePorts = []
        self.updateComPortSelection()
        self.updateBaudRates()
        self.boardConfiguration = {}
        self.manualConnect = True
        
        # Update comm port combo box to use last used comm port
        defaultComPort = xml.find("./Settings/DefaultComPort").text
        commIndex = self.ui.comPort.findText(defaultComPort)
        if commIndex == -1:
            commIndex = 0
        self.ui.comPort.setCurrentIndex(commIndex)
        
        # Load splash screen
        splash = Ui_splashScreen()
        splash.setupUi(splash)
        self.ui.subPanel.addWidget(splash)
        
        # Dynamically configure board type menu and subPanel menu from XML configuration file
        self.configureSubPanelMenu()
        self.activeSubPanel = None
        self.activeSubPanelName = ""

        # Connect GUI slots and signals
        self.ui.comPort.return_handler = self.connectBoard
        self.ui.buttonConnect.clicked.connect(self.connectBoard)
        self.ui.buttonDisconnect.clicked.connect(self.disconnectBoard)
        self.ui.actionExit.triggered.connect(QtGui.qApp.quit)
        self.ui.comPort.currentIndexChanged.connect(self.updateDetectedPorts)
        self.ui.actionBootUpDelay.triggered.connect(self.updateBootUpDelay)
        self.ui.actionCommTimeout.triggered.connect(self.updateCommTimeOut)

    ####### Communication Methods #######       
    def connectBoard(self):
        '''Initiates communication with the AeroQuad'''
        # Setup GUI
        self.ui.status.setText("Connecting...")
        self.ui.buttonDisconnect.setEnabled(True)
        self.ui.buttonConnect.setEnabled(False)
        self.ui.comPort.setEnabled(False)
        self.ui.baudRate.setEnabled(False)
        # Update the GUI
        app.processEvents()
        
        # Setup serial port
        bootupDelay = float(xml.find("./Settings/BootUpDelay").text)
        commTimeOut = float(xml.find("./Settings/CommTimeOut").text)
        try:
            self.comm.connect(str(self.ui.comPort.currentText()), int(self.ui.baudRate.currentText()), bootupDelay, commTimeOut)
            # Stop and flush any previous telemetry being streamed
            stopTelemetry = xml.find("./Settings/StopTelemetry").text
            self.comm.write(stopTelemetry)
            self.comm.flushResponse()
            # Request version number to identify AeroQuad board
            versionRequest = xml.find("./Settings/SoftwareVersion").text
            self.comm.write(versionRequest)
            version = self.comm.waitForRead()

            if version != "":
                self.storeComPortSelection()
                self.ui.status.setText("Connected to AeroQuad Flight Software v" + version)
                # Read board configuration
                config = xml.find("./Settings/BoardConfiguration").text
                self.comm.write(config)
                size = int(self.comm.waitForRead())
                for index in range(size):
                    response = self.comm.waitForRead()
                    configuration = response.split(':')
                    self.boardConfiguration[configuration[0]] = configuration[1].strip()
            
                # Hide menu items that don't match board configuration
                for index in range(len(self.subPanelMenu)):
                    hide = self.checkRequirementsMatch(self.subPanelList[index])
                    self.subPanelMenu[index].setVisible(hide)
                # Load configuration screen
                self.selectSubPanel("Vehicle Configuration")
                self.restartSubPanel()
                return True
            else:
                self.disconnectBoard()
                self.ui.status.setText("Not connected to the AeroQuad")
                if self.manualConnect:
                    QtGui.QMessageBox.information(self, "Connection Error", "Unable to connect to the AeroQuad.  Try increasing the Boot Up Delay.\nThis is found under File->Preferences->Boot Up Delay.")
                return False
        except SerialException:
            self.ui.buttonDisconnect.setEnabled(False)
            self.ui.buttonConnect.setEnabled(True)
            self.ui.comPort.setEnabled(True)
            self.ui.baudRate.setEnabled(True)
            self.ui.status.setText("Connection Failed")
            self.boardConfiguration = {}
            return False
        
    def disconnectBoard(self):
        '''Disconnect from the AeroQuad'''
        self.comm.write(xml.find("./Settings/StopTelemetry").text)
        self.comm.disconnect()
        # Update GUI
        self.ui.buttonDisconnect.setEnabled(False)
        self.ui.buttonConnect.setEnabled(True)
        self.ui.comPort.setEnabled(True)
        self.ui.baudRate.setEnabled(True)
        self.ui.status.setText("Disconnected from the AeroQuad")
        self.boardConfiguration = {}
        self.restartSubPanel()

    def updateDetectedPorts(self):
        '''Cycles through 256 ports and checks if there is a response from them.'''
        selection = self.ui.comPort.currentText()
        if selection == "Refresh":
            self.updateComPortSelection()
            self.ui.comPort.setCurrentIndex(0)
            self.ui.status.setText("Updated list of available COM ports")
        elif selection == "Autoconnect":
            self.updateComPortSelection()
            self.ui.comPort.setCurrentIndex(0)
            self.ui.status.setText("Beginning autoconnect...")
            self.autoConnect()
            
    def autoConnect(self):
        self.manualConnect = False
        for port in xrange(self.ui.comPort.count() - 2):
            self.ui.comPort.setCurrentIndex(port)
            self.ui.status.setText("Attempting to connect to " + self.ui.comPort.currentText() + "...")
            if self.connectBoard():
                self.ui.status.setText("Autoconnect successful!")
                break
            else:
                self.ui.status.setText("Autoconnect not successful...")
        self.manualConnect = True
    
    def updateBootUpDelay(self):
        '''Creates dialog box to ask user for desired boot up delay.
        This delay waits for Arduino based boards to finish booting up before sending commands.
        '''
        bootUpDelay = float(xml.find("./Settings/BootUpDelay").text)
        data, ok = QtGui.QInputDialog.getDouble(self, "Boot Up Delay", "Boot Up Delay:", bootUpDelay, 0, 60, 3)
        if ok:
            xml.find("./Settings/BootUpDelay").text = str(data)
            xml.write("AeroQuadConfigurator.xml")
 
    def updateCommTimeOut(self):
        '''Creates dialog box to ask user for desired comm timeout.
        This is timeout value used by serial drivers to wait for response from device
        '''
        commTimeOut = float(xml.find("./Settings/CommTimeOut").text)
        data, ok = QtGui.QInputDialog.getDouble(self, "Comm Time Out", "Comm Time Out:", commTimeOut, 0, 60, 3)
        if ok:
            xml.find("./Settings/CommTimeOut").text = str(data)
            xml.write("AeroQuadConfigurator.xml")

    def updateComPortSelection(self):
        '''Look for available comm ports and updates combo box'''
        self.ui.comPort.clear()
        for n in self.comm.detectPorts():
            self.ui.comPort.addItem(n)
        self.ui.comPort.insertSeparator(self.ui.comPort.count())
        self.ui.comPort.addItem("Autoconnect")
        self.ui.comPort.addItem("Refresh")
        
    def storeComPortSelection(self):
        '''Stores comm port selection to xml file for later recall'''
        xml.find("./Settings/DefaultBaudRate").text = str(self.ui.baudRate.currentText())
        xml.find("./Settings/DefaultComPort").text = str(self.ui.comPort.currentText())
        xml.write("AeroQuadConfigurator.xml")
               
    def updateBaudRates(self):
        '''Reads baud rates from xml and displays in combo box.
        Updates the xml file to display different baud rates
        '''
        defaultBaudRate = xml.find("./Settings/DefaultBaudRate").text
        baudRates = xml.find("./Settings/AvailableBaudRates").text
        baudRate = baudRates.split(',')
        for i in baudRate:
            self.ui.baudRate.addItem(i)
        self.ui.baudRate.setCurrentIndex(baudRate.index(defaultBaudRate))     


    ####### SubPanel Methods #######
    def configureSubPanelMenu(self):
        '''Dynamically add subpanels to View menu based on XML file configuration
        This also adds the subpanel to a stacked widget and stores object instances so that they can run when selected'''
        subPanels = xml.findall("./Subpanels/Subpanel")
        subPanelCount = 1
        self.subPanelList = [] # Stores subpanel names
        self.subPanelClasses = [] # Stores subpanel object instances
        for subPanel in subPanels:
            self.subPanelList.append(subPanel.get("Name"))
            pathName = xml.find("./Subpanels/Subpanel/[@Name='" + subPanel.get("Name") +"']/Path").text
            className = xml.find("./Subpanels/Subpanel/[@Name='" + subPanel.get("Name") +"']/Class").text
            packageList = pathName.split('.')
            packageList.insert(0, 'subpanel')
            packageString = packageList[0] + '.' + packageList[1] + '.' + packageList[2]
            module = __import__(packageString)
            for package in packageList[1:]: # In case the module is buried into a deep package folder, loop until module is reached
                module = getattr(module, package)
            module = getattr(module, className)
            tempSubPanel = module()          
            tempSubPanel.initialize(self.comm, xml, self.ui)
            self.ui.subPanel.addWidget(tempSubPanel)
            self.subPanelClasses.append(tempSubPanel)
            subPanelCount += 1
        self.subPanelMapper = QtCore.QSignalMapper(self)
        self.subPanelMenu = []
        for subPanelName in self.subPanelList:
            subPanel = self.ui.menuView.addAction(subPanelName)
            self.subPanelMenu.append(subPanel) # Need to store this separately because Python only binds stuff at runtime
            self.subPanelMapper.setMapping(subPanel, subPanelName)
            subPanel.triggered.connect(self.subPanelMapper.map)
            subPanel.setCheckable(True)
        self.subPanelMapper.mapped[str].connect(self.selectSubPanel)       
  
    def selectSubPanel(self, subPanelName):
        '''Places check mark beside selected subpanel name
        Menu item instances stored in dedicated list because Python only updates during runtime making everything point to the last item in the list
        '''
        if self.activeSubPanel != None:
            self.activeSubPanel.stop()
        types = len(self.subPanelList)
        for index in range(types):
            self.subPanelMenu[index].setChecked(False)
        selected = self.subPanelList.index(subPanelName)
        self.subPanelMenu[selected].setChecked(True)
        self.ui.subPanel.setCurrentIndex(selected+1) # index 0 is splash screen
        self.activeSubPanel = self.subPanelClasses[selected]
        self.activeSubPanelName = "./Subpanels/Subpanel/[@Name='" + str(subPanelName) + "']" 
        self.activeSubPanel.start(self.activeSubPanelName, self.boardConfiguration)
        self.ui.status.setText(subPanelName)
        app.processEvents()

    def clearSubPanelMenu(self):
        ''' Clear subPanel menu and disconnect subPanel related signals'''
        self.ui.menuView.clear()
        self.subPanelMapper.mapped[str].disconnect(self.selectSubPanel)
        
    def restartSubPanel(self):
        if self.activeSubPanel != None: # Restart any running subpanels
            self.activeSubPanel.stop()
            self.activeSubPanel.start(self.activeSubPanelName, self.boardConfiguration)
            app.processEvents()
            
    def checkRequirementsMatch(self, subPanelName):
        # Read requirements for the specified subpanel form the XML config file
        xmlRequirement = "./Subpanels/Subpanel/[@Name='" + subPanelName +"']/Requirement"
        subPanelRequirements = xml.findall(xmlRequirement)
        
        panelRequirements = {}
        booleanOperation = {}      
        for requirements in subPanelRequirements:
            requirement = requirements.text.split(':')
            if requirement[0] == "All": # Need element 1 populated if "All" detected
                requirement.append("All")
            panelRequirements[requirement[0]] = requirement[1].strip()
            booleanOperation[requirement[0]] = requirements.get("type")

        # Go through each subpanel requirement and check against board configuration
        # If no boolean type defined, assume AND
        requirementType = panelRequirements.keys()
        # If no Requirement found, assume ALL
        try:
            if (requirementType[0] == "All"):
                check = True
            else:
                check = any(panelRequirements[requirementType[0]] in s for s in self.boardConfiguration.values())
                for testRequirement in requirementType[1:]:
                    if (booleanOperation[testRequirement] == "or") or (booleanOperation[testRequirement] == "OR"):
                        check = check or any(panelRequirements[testRequirement] in s for s in self.boardConfiguration.values())
                    else:
                        check = check and any(panelRequirements[testRequirement] in s for s in self.boardConfiguration.values())
        except:
            check = True
        return check

    ####### Housekeeping Functions #######
    def exit(self):
        self.comm.disconnect()
        sys.exit(app.exec_())

    def center(self):
        qr = self.frameGeometry()
        cp = QtGui.QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())
Esempio n. 3
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class AQMain(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        # TODO: figure out way to configure for different comm types (TCP, MAVLINK, etc)
        self.comm = AQSerial()

        # Default main window conditions
        self.ui.buttonDisconnect.setEnabled(False)
        self.ui.buttonConnect.setEnabled(True)
        self.ui.comPort.setEnabled(True)
        self.ui.baudRate.setEnabled(True)
        self.ui.status.setText("Not connected to the AeroQuad")
        self.availablePorts = []
        self.updateComPortSelection()
        self.updateBaudRates()

        # Update comm port combo box to use last used comm port
        defaultComPort = xml.find("./Settings/DefaultComPort").text
        commIndex = self.ui.comPort.findText(defaultComPort)
        if commIndex == -1:
            commIndex = 0
        self.ui.comPort.setCurrentIndex(commIndex)

        # Load splash screen
        self.subPanel = Ui_splashScreen()
        self.subPanel.setupUi(self.subPanel)
        self.ui.subPanel.addWidget(self.subPanel)

        # Dynamically configure board type menu and subPanel menu from XML configuration file
        self.selectedBoardType = self.configureBoardTypeMenu()
        self.configureSubPanelMenu(self.selectedBoardType)
        self.activeSubPanel = None

        # Connect GUI slots and signals
        self.ui.buttonConnect.clicked.connect(self.connect)
        self.ui.buttonDisconnect.clicked.connect(self.disconnect)
        self.ui.actionExit.triggered.connect(QtGui.qApp.quit)
        self.ui.comPort.currentIndexChanged.connect(self.updateDetectedPorts)
        self.ui.actionBootUpDelay.triggered.connect(self.updateBootUpDelay)
        self.ui.actionCommTimeout.triggered.connect(self.updateCommTimeOut)

    '''Communication Methods'''

    def connect(self):
        '''Initiates communication with the AeroQuad'''
        # Setup GUI
        self.ui.status.setText("Connecting to the " + self.selectedBoardType +
                               "...")
        self.ui.buttonDisconnect.setEnabled(True)
        self.ui.buttonConnect.setEnabled(False)
        self.ui.comPort.setEnabled(False)
        self.ui.baudRate.setEnabled(False)
        # Update the GUI
        app.processEvents()

        # Setup serial port
        bootupDelay = float(xml.find("./Settings/BootUpDelay").text)
        commTimeOut = float(xml.find("./Settings/CommTimeOut").text)
        self.comm.connect(str(self.ui.comPort.currentText()),
                          int(self.ui.baudRate.currentText()), bootupDelay,
                          commTimeOut)
        self.comm.write("!")
        version = self.comm.read()
        if version != "":
            self.storeComPortSelection()
            self.ui.status.setText("Connected to the " +
                                   self.selectedBoardType +
                                   " using Flight Software v" + version)
            self.restartSubPanel()
        else:
            self.disconnect()
            self.ui.status.setText("Not connected to the " +
                                   self.selectedBoardType)

    def disconnect(self):
        '''Disconnect from the AeroQuad'''
        self.comm.write("X")
        self.comm.disconnect()
        # Update GUI
        self.ui.buttonDisconnect.setEnabled(False)
        self.ui.buttonConnect.setEnabled(True)
        self.ui.comPort.setEnabled(True)
        self.ui.baudRate.setEnabled(True)
        self.ui.status.setText("Disconnected from the " +
                               self.selectedBoardType)
        self.restartSubPanel()

    def updateDetectedPorts(self):
        '''Cycles through 256 ports and checks if there is a response from them.'''
        selection = self.ui.comPort.currentText()
        if selection == "Refresh":
            self.updateComPortSelection
            self.ui.comPort.setCurrentIndex(0)
            self.ui.status.setText("Updated list of available COM ports")
        elif selection == "Autoconnect":
            self.ui.comPort.setCurrentIndex(0)
            self.ui.status.setText("This feature still under construction")
        elif selection == "-------":
            self.ui.comPort.setCurrentIndex(0)

    def updateBootUpDelay(self):
        '''Creates dialog box to ask user for desired boot up delay.
        This delay waits for Arduino based boards to finish booting up before sending commands.
        '''
        bootUpDelay = float(xml.find("./Settings/BootUpDelay").text)
        data, ok = QtGui.QInputDialog.getDouble(self, "Boot Up Delay",
                                                "Boot Up Delay:", bootUpDelay,
                                                0, 60, 3)
        if ok:
            xml.find("./Settings/BootUpDelay").text = str(data)
            xml.write("AeroQuadConfigurator.xml")

    def updateCommTimeOut(self):
        '''Creates dialog box to ask user for desired comm timeout.
        This is timeout value used by serial drivers to wait for response from device
        '''
        commTimeOut = float(xml.find("./Settings/CommTimeOut").text)
        data, ok = QtGui.QInputDialog.getDouble(self, "Comm Time Out",
                                                "Comm Time Out:", commTimeOut,
                                                0, 60, 3)
        if ok:
            xml.find("./Settings/CommTimeOut").text = str(data)
            xml.write("AeroQuadConfigurator.xml")

    def updateComPortSelection(self):
        '''Look for available comm ports and updates combo box'''
        self.ui.comPort.clear()
        for n in self.comm.detectPorts():
            self.ui.comPort.addItem(n)
        self.ui.comPort.addItem("-------")
        self.ui.comPort.addItem("Autoconnect")
        self.ui.comPort.addItem("Refresh")

    def storeComPortSelection(self):
        '''Stores comm port selection to xml file for later recall'''
        xml.find("./Settings/DefaultBaudRate").text = str(
            self.ui.baudRate.currentText())
        xml.find("./Settings/DefaultComPort").text = str(
            self.ui.comPort.currentText())
        xml.write("AeroQuadConfigurator.xml")

    def updateBaudRates(self):
        '''Reads baud rates from xml and displays in combo box.
        Updates the xml file to display different baud rates
        '''
        defaultBaudRate = xml.find("./Settings/DefaultBaudRate").text
        baudRates = xml.find("./Settings/AvailableBaudRates").text
        baudRate = baudRates.split(',')
        for i in baudRate:
            self.ui.baudRate.addItem(i)
        self.ui.baudRate.setCurrentIndex(baudRate.index(defaultBaudRate))

    '''Board Selection Methods'''

    def configureBoardTypeMenu(self):
        '''Dynamically add board types to menu bar'''
        boardNames = xml.findall("./Boards/Type")
        self.boardTypes = []
        self.boardMenu = []
        for board in boardNames:
            self.boardTypes.append(board.text)
        self.boardTypeMapper = QtCore.QSignalMapper(self)
        for boardType in self.boardTypes:
            self.ui.board = self.ui.menuBoard.addAction(boardType)
            self.boardMenu.append(
                self.ui.board
            )  # Need to store this separately because Python only binds stuff at runtime
            self.boardTypeMapper.setMapping(self.ui.board, boardType)
            self.ui.board.triggered.connect(self.boardTypeMapper.map)
            self.ui.board.setCheckable(True)
        self.boardTypeMapper.mapped[str].connect(self.selectBoardType)
        selectedBoardType = xml.find("./Boards/Selected").text
        self.checkmarkBoardType(selectedBoardType)
        return selectedBoardType

    def selectBoardType(self, boardType):
        '''Places check mark beside selected board type
        Menu item instances stored in dedicated list because Python only updates during runtime making everything point to the last item in the list
        '''
        types = len(self.boardTypes)
        for name in range(types):
            self.boardMenu[name].setChecked(False)
        self.checkmarkBoardType(boardType)
        selected = self.boardTypes.index(boardType)
        self.boardMenu[selected].setChecked(True)
        xml.find("./Boards/Selected").text = str(boardType)
        xml.write("AeroQuadConfigurator.xml")
        self.selectedBoardType = boardType
        self.clearSubPanelMenu()
        self.configureSubPanelMenu(boardType)
        self.ui.subPanel.setCurrentIndex(0)

    def checkmarkBoardType(self, boardType):
        '''Place checkmark next to selected board type'''
        selected = self.boardTypes.index(boardType)
        self.boardMenu[selected].setChecked(True)

    ''' SubPanel Methods '''

    def configureSubPanelMenu(self, boardType):
        '''Dynamically add subpanels to View menu based on selected board type'''
        boardSubPanelName = "./Board/[@Type='" + str(
            boardType) + "']/Subpanels/Subpanel"
        subPanels = xml.findall(boardSubPanelName)
        subPanelCount = 1
        self.subPanelList = []
        self.subPanelClasses = []
        for subPanel in subPanels:
            self.subPanelList.append(subPanel.get("Name"))
            pathName = xml.find(boardSubPanelName + "/[@Name='" +
                                subPanel.get("Name") + "']/Path").text
            className = xml.find(boardSubPanelName + "/[@Name='" +
                                 subPanel.get("Name") + "']/Class").text
            packageList = pathName.split('.')
            packageString = packageList[0] + '.' + packageList[1]
            module = __import__(packageString)
            for package in packageList[1:]:
                module = getattr(module, package)
            module = getattr(module, className)
            tempSubPanel = module()
            tempSubPanel.setupUi(tempSubPanel, self.comm)
            self.ui.subPanel.addWidget(tempSubPanel)
            self.subPanelClasses.append(tempSubPanel)
            subPanelCount += 1

        self.subPanelMapper = QtCore.QSignalMapper(self)
        self.subPanelMenu = []
        for subPanelName in self.subPanelList:
            subPanel = self.ui.menuView.addAction(subPanelName)
            self.subPanelMenu.append(
                subPanel
            )  # Need to store this separately because Python only binds stuff at runtime
            self.subPanelMapper.setMapping(subPanel, subPanelName)
            subPanel.triggered.connect(self.subPanelMapper.map)
            subPanel.setCheckable(True)
        self.subPanelMapper.mapped[str].connect(self.selectSubPanel)

    def selectSubPanel(self, subPanelName):
        '''Places check mark beside selected subpanel name
        Menu item instances stored in dedicated list because Python only updates during runtime making everything point to the last item in the list
        '''
        if self.activeSubPanel != None:
            self.activeSubPanel.stop()
        types = len(self.subPanelList)
        for index in range(types):
            self.subPanelMenu[index].setChecked(False)
        selected = self.subPanelList.index(subPanelName)
        self.subPanelMenu[selected].setChecked(True)
        self.ui.subPanel.setCurrentIndex(selected +
                                         1)  # index 0 is splash screen
        self.activeSubPanel = self.subPanelClasses[selected]
        self.activeSubPanel.start()

    def clearSubPanelMenu(self):
        ''' Clear subPanel menu and disconnect subPanel related signals'''
        self.ui.menuView.clear()
        self.subPanelMapper.mapped[str].disconnect(self.selectSubPanel)

    def restartSubPanel(self):
        if self.activeSubPanel != None:  # Restart any running subpanels
            self.activeSubPanel.stop()
            self.activeSubPanel.start()

    ''' Housekeeping Functions'''

    def exit(self):
        self.comm.disconnect()
        sys.exit(app.exec_())