It's now possible to freely connect and disconnect from/to the GVRET device.

mainwindow.cpp

@@ -85,6 +85,7 @@ MainWindow::MainWindow(QWidget *parent) :
     connect(worker, &SerialWorker::connectionSuccess, this, &MainWindow::connectionSucceeded, Qt::QueuedConnection);
     connect(worker, &SerialWorker::connectionFailure, this, &MainWindow::connectionFailed, Qt::QueuedConnection);
     connect(worker, &SerialWorker::deviceInfo, this, &MainWindow::gotDeviceInfo, Qt::QueuedConnection);
+    connect(this, &MainWindow::closeSerialPort, worker, &SerialWorker::closeSerialPort, Qt::QueuedConnection);
     serialWorkerThread.start();
 
     graphingWindow = NULL;
@@ -116,6 +117,8 @@ MainWindow::MainWindow(QWidget *parent) :
     ui->statusBar->addWidget(&lbStatusConnected);
     ui->statusBar->addWidget(&lbStatusBauds);
     ui->statusBar->addWidget(&lbStatusDatabase);
+
+    isConnected = false;
 }
 
 MainWindow::~MainWindow()
@@ -653,6 +656,8 @@ void MainWindow::showEditSignalsWindow()
 }
 
 void MainWindow::connButtonPress()
+{
+    if (!isConnected)
     {
         for (int x = 0; x < ports.count(); x++)
         {
@@ -664,6 +669,14 @@ void MainWindow::connButtonPress()
             }
         }
     }
+    else
+    {
+        emit closeSerialPort();
+        isConnected = false;
+        lbStatusConnected.setText(tr("Not Connected"));
+        ui->btnConnect->setText(tr("Connect to GVRET"));
+    }
+}
 
 void MainWindow::connectionSucceeded(int baud0, int baud1)
 {
@@ -688,7 +701,9 @@ void MainWindow::connectionSucceeded(int baud0, int baud1)
         ui->cbSpeed2->addItem(QString::number(baud1));
         ui->cbSpeed2->setCurrentIndex(ui->cbSpeed2->count() - 1);
     }
-    ui->btnConnect->setEnabled(false);
+    //ui->btnConnect->setEnabled(false);
+    ui->btnConnect->setText(tr("Disconnect from GVRET"));
+    isConnected = true;
 }
 
 void MainWindow::connectionFailed()

mainwindow.h

@@ -51,6 +51,7 @@ public slots:
 
 signals:
     void sendSerialPort(QSerialPortInfo *port);
+    void closeSerialPort();
     void updateBaudRates(int, int);
     void sendCANFrame(const CANFrame *, int);
 
@@ -69,6 +70,7 @@ private:
     QLabel lbStatusConnected;
     QLabel lbStatusBauds;
     QLabel lbStatusDatabase;
+    bool isConnected;
     void loadCRTDFile(QString);
     void loadNativeCSVFile(QString);
     void loadGenericCSVFile(QString);

serialworker.cpp

@@ -11,12 +11,8 @@ SerialWorker::SerialWorker(CANFrameModel *model, QObject *parent) : QObject(pare
     rx_step = 0;
     buildFrame = new CANFrame;
     canModel = model;
-    ticker.setInterval(250); //tick four times per second
-    ticker.setSingleShot(false); //keep ticking
-    ticker.start();
     gotFrames = 0;
-
+    ticker = NULL;
-    connect(&ticker, SIGNAL(timeout()), this, SLOT(handleTick()));
 }
 
 SerialWorker::~SerialWorker()
@@ -32,7 +28,7 @@ SerialWorker::~SerialWorker()
         serial->disconnect(); //disconnect all signals
         delete serial;
     }
-    ticker.stop();
+    ticker->stop();
 }
 
 void SerialWorker::setSerialPort(QSerialPortInfo *port)
@@ -68,6 +64,14 @@ void SerialWorker::setSerialPort(QSerialPortInfo *port)
     connected = false;
     connect(serial, SIGNAL(readyRead()), this, SLOT(readSerialData()));
     QTimer::singleShot(1000, this, SLOT(connectionTimeout()));
+    if (ticker == NULL)
+    {
+        ticker = new QTimer;
+        connect(ticker, SIGNAL(timeout()), this, SLOT(handleTick()));
+    }
+    ticker->setInterval(250); //tick four times per second
+    ticker->setSingleShot(false); //keep ticking
+    ticker->start();
 }
 
 void SerialWorker::connectionTimeout()
@@ -77,6 +81,7 @@ void SerialWorker::connectionTimeout()
     {
         //then emit the the failure signal and see if anyone cares
         qDebug() << "Failed to connect to GVRET at that com port";
+        ticker->stop();
         emit connectionFailure();
     }
 }
@@ -335,6 +340,7 @@ void SerialWorker::procRXChar(unsigned char c)
 
 void SerialWorker::handleTick()
 {
+    //qDebug() << "Tick!";
     if (gotFrames > 0)
     {
         emit receivedFrames(); //notify interested parties that there are new frames
@@ -342,3 +348,17 @@ void SerialWorker::handleTick()
         gotFrames = 0;
     }
 }
+
+//totally shuts down the whole thing
+void SerialWorker::closeSerialPort()
+{
+    if (serial->isOpen())
+    {
+        serial->clear();
+        serial->close();
+    }
+    serial->disconnect();
+    ticker->stop();
+    delete serial;
+    serial = NULL;
+}

serialworker.h

@@ -44,6 +44,7 @@ private slots: //we receive things in slots
 
 public slots:
     void setSerialPort(QSerialPortInfo*);
+    void closeSerialPort();
     void sendFrame(const CANFrame *, int);
     void updateBaudRates(int, int);
 
@@ -53,7 +54,7 @@ private:
     bool connected;
     QSerialPort *serial;
     CANFrameModel *canModel;
-    QTimer ticker;
+    QTimer *ticker;
     int gotFrames;
     STATE rx_state;
     int rx_step;