Sending multiple Canframes and processing it at the same time

[PriyankaM96]

Currently, I am working on sending the CAN signals of type QCanBusFrame and receiving the signals accordingly. But, I am facing difficulty to send multiple signals at the same time since once a signal is sent, it repeats until its cycle length. So if I send another signal, it stays in the loop until the other signal is completed (cycle number of times)


I want to send the signal simultaneously and see the received signals in GUI. Can I have any suggestions? is multithreading a solution for this problem?

void MainWindow::sendFrame(const QCanBusFrame &frame,QString cycle)
{
    if (!m_canDevice)
        return;
 
    m_frame_list.enqueue(frame);
    send_frame_str = frame.toString();
 
    int i = 1;
 
    while (!m_frame_list.isEmpty()) {
 
        QCanBusFrame m_frame = m_frame_list.dequeue();
 
        while ( i <= cycle.toInt()) {
 
            m_canDevice->writeFrame(frame);
 
            delay(5500);
 
            i = i+1;
        }
    }
}

void MainWindow::sendFrame(const QCanBusFrame &frame,QString cycle)
{
    if (!m_canDevice)
        return;

    m_frame_list.enqueue(frame);
    send_frame_str = frame.toString();

    int i = 1;

    while (!m_frame_list.isEmpty()) {

        QCanBusFrame m_frame = m_frame_list.dequeue();

        while ( i <= cycle.toInt()) {

            m_canDevice->writeFrame(frame);

            delay(5500);

            i = i+1;
        }
    }
}

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This is my code for writing the frame and sending is done as shown below

foreach(QString payload_id, payload_send_final) {
 
            const QByteArray payload = QByteArray::fromHex(payload_id.remove(QLatin1Char(' ')).toLatin1());
            qDebug() << payload;
            frame = QCanBusFrame(frameId, payload);
 
            if(m_ui->cycle_check->isChecked())
                emit sendFrame(frame,cycle_len.at(i));
            else
                emit sendFrame(frame,"1");
            i = i + 1;
        }

foreach(QString payload_id, payload_send_final) {

            const QByteArray payload = QByteArray::fromHex(payload_id.remove(QLatin1Char(' ')).toLatin1());
            qDebug() << payload;
            frame = QCanBusFrame(frameId, payload);

            if(m_ui->cycle_check->isChecked())
                emit sendFrame(frame,cycle_len.at(i));
            else
                emit sendFrame(frame,"1");
            i = i + 1;
        }

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[ChrisW67]

is multithreading a solution for this problem?

No. Allow your code to return to the Qt event loop and use the signals and slots offered by QCanBusDevice

[PriyankaM96]

Problem solved. Had a blocking function from another class.