Problems with Threads connect

[Max123]

Hi,

I have created a Thread class:

#ifndef SERIALTHREAD_H
#define SERIALTHREAD_H
 
#include <QThread>
#include <qDebug>
#include "qextserialport.h"
class SerialThread : public QThread
{
    Q_OBJECT
public:
    SerialThread(QString name) {
        portName=name;
    }
 
    void run();
 
 
private:
    QString portName;
    QextSerialPort *port;
 
private slots:
    void onReadyRead();
 
};
 
#endif // SERIALTHREAD_H

#ifndef SERIALTHREAD_H
#define SERIALTHREAD_H

#include <QThread>
#include <qDebug>
#include "qextserialport.h"
class SerialThread : public QThread
{
    Q_OBJECT
public:
    SerialThread(QString name) {
        portName=name;
    }

    void run();


private:
    QString portName;
    QextSerialPort *port;

private slots:
    void onReadyRead();

};

#endif // SERIALTHREAD_H

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#include "SerialThread.h"
 
void SerialThread::run() {
    port = new QextSerialPort(portName, QextSerialPort::EventDriven);
    connect(port, SIGNAL(readyRead()), this, SLOT(onReadyRead()));
    port->setBaudRate(BAUD9600);
    port->setFlowControl(FLOW_OFF);
    port->setParity(PAR_NONE);
    port->setDataBits(DATA_8);
    port->setStopBits(STOP_1);
    port->open(QIODevice::ReadWrite);
    exec();
}
 
void SerialThread::onReadyRead()
{
    QByteArray bytes;
    int a = port->bytesAvailable();
    bytes.resize(a);
    port->read(bytes.data(), bytes.size());
    qDebug() << "bytes read:" << bytes.size();
    qDebug() << "bytes:" << bytes;
}

#include "SerialThread.h"

void SerialThread::run() {
    port = new QextSerialPort(portName, QextSerialPort::EventDriven);
    connect(port, SIGNAL(readyRead()), this, SLOT(onReadyRead()));
    port->setBaudRate(BAUD9600);
    port->setFlowControl(FLOW_OFF);
    port->setParity(PAR_NONE);
    port->setDataBits(DATA_8);
    port->setStopBits(STOP_1);
    port->open(QIODevice::ReadWrite);
    exec();
}

void SerialThread::onReadyRead()
{
    QByteArray bytes;
    int a = port->bytesAvailable();
    bytes.resize(a);
    port->read(bytes.data(), bytes.size());
    qDebug() << "bytes read:" << bytes.size();
    qDebug() << "bytes:" << bytes;
}

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In the MainWindow I call this Thread:

MainWindow::MainWindow() {
    setupUi(this);
    t1 = new SerialThread("/dev/cu.usbserial-ftDIHUS6");
    t1->start();
}

MainWindow::MainWindow() {
    setupUi(this);
    t1 = new SerialThread("/dev/cu.usbserial-ftDIHUS6");
    t1->start();
}

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it seems to be a problem with the signals. When I send:
u I get:

bytes read: 1 
bytes: "u" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: ""

bytes read: 1 
bytes: "u" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: "" 
bytes read: 0 
bytes: ""

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Without Threads it works so what's the problem?

[^NyAw^]

Hi,

Why do you want to use QextSerialPort inside a thread if you are using it as EventDriven?

[Max123]

It was only I try. Later I wanted to use a protocol and some heavy calculations. But it shouldn't be a problem, when a thread have it's one event loop.

[^NyAw^]

Hi,

Think on that QextSerialPort 1.2 is an Alpha version (not a beta and not a release) so it may contain a lot of errors(the creator have closed the development). Try checking the bytes obtained on "bytesAvailable" and if it is 0 just ignore it.