How to use QThread with CAN bus?

victor wang

Hi, i'm using qt5.5 on my computer which based on QT for my OS system.
I wanna do Sending and Receiving together via CanBus.
And this is my code here.

void MainWindow::on_pushButton_SenReceive_clicked()
{
    QThread *thread1=new QThread;
    QThread *thread2=new QThread;

    connect(thread1,SIGNAL(started()),this,SLOT(cansend()));
    connect(thread2,SIGNAL(started()),this,SLOT(candump()));

    thread1->moveToThread(thread1);
    thread2->moveToThread(thread2);
    thread1->start();
    thread2->start();
}

void MainWindow::cansend()
{
    QString info;
    qDebug("cansend");
    Process::executeProcessSync(QString("sh"),QStringList()<<"-c"<<"/usr/sbin/canconfig can0 stop",&info);
    qDebug()<<info;
    Process::executeProcessSync(QString("sh"),QStringList()<<"-c"<<"/usr/sbin/canconfig can0 bitrate 50000 ctrlmode triple-sampling on",&info);
    qDebug()<<info;
    Process::executeProcessSync(QString("sh"),QStringList()<<"-c"<<"/usr/sbin/canconfig can0 start",&info);
    qDebug()<<info;
    Process::executeProcessSync(QString("sh"),QStringList()<<"-c"<<"cansend can0 -i 0x100 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88");
}
void MainWindow::candump()
{
    QString info;
    Process::executeProcessSync(QString("sh"),QStringList()<<"-c"<<"/usr/sbin/canconfig can1 stop",&info);
    qDebug()<<info;
    Process::executeProcessSync(QString("sh"),QStringList()<<"-c"<<"/usr/sbin/canconfig can1 bitrate 50000 ctrlmode triple-sampling on",&info);
    qDebug()<<info;
    Process::executeProcessSync(QString("sh"),QStringList()<<"-c"<<"/usr/sbin/canconfig can1 start",&info);
    qDebug()<<info;
    Process::executeProcessSync(QString("sh1"),QStringList()<<"-c"<<"candump can1 &",&info);
    qDebug("candump4");

    ui->textEditPT_Canbus_43->append(info);
}

But when i pushed my button it will not show anything out on the textEditPT_Canbus_43.
P.S. the"sh1"is not the wrong commend, i will do some check if it is sh1.
Did i miss anything?
Please help!

jsulm

@victor-wang Did you try it like this:

Process::executeProcessSync(QString("sh"),QStringList()<<"-c"<<"/usr/sbin/canconfig"<< "can0"<< "stop",&info);

J.Hilk

@jsulm
Don't you think problem is rather, this:

QThread *thread1=new QThread;
thread1->moveToThread(thread1);

I'm not sure this even compiles...

@victor-wang Thread Example

jsulm

@J.Hilk This is funny :-)
But it should compile at least.

victor wang

@jsulm
I don't think it is the problem cause i had debug it it will print the right respond to me.

@J-Hilk
Is that you mean i have to move to thread2 and thread2 move to thread 1 for instead?

jsulm

@victor-wang Why do you move thread1 object to the thread managed by it? It is quite unusual.
Just remove this line

thread1->moveToThread(thread1);