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Thread: Sending multiple Canframes and processing it at the same time

  1. #1
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    Question Sending multiple Canframes and processing it at the same time

    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?

    Qt Code:
    1. void MainWindow::sendFrame(const QCanBusFrame &frame,QString cycle)
    2. {
    3. if (!m_canDevice)
    4. return;
    5.  
    6. m_frame_list.enqueue(frame);
    7. send_frame_str = frame.toString();
    8.  
    9. int i = 1;
    10.  
    11. while (!m_frame_list.isEmpty()) {
    12.  
    13. QCanBusFrame m_frame = m_frame_list.dequeue();
    14.  
    15. while ( i <= cycle.toInt()) {
    16.  
    17. m_canDevice->writeFrame(frame);
    18.  
    19. delay(5500);
    20.  
    21. i = i+1;
    22. }
    23. }
    24. }
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    This is my code for writing the frame and sending is done as shown below

    Qt Code:
    1. foreach(QString payload_id, payload_send_final) {
    2.  
    3. const QByteArray payload = QByteArray::fromHex(payload_id.remove(QLatin1Char(' ')).toLatin1());
    4. qDebug() << payload;
    5. frame = QCanBusFrame(frameId, payload);
    6.  
    7. if(m_ui->cycle_check->isChecked())
    8. emit sendFrame(frame,cycle_len.at(i));
    9. else
    10. emit sendFrame(frame,"1");
    11. i = i + 1;
    12. }
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  2. #2
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    Default Re: Sending multiple Canframes and processing it at the same time

    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

  3. The following user says thank you to ChrisW67 for this useful post:

    PriyankaM96 (17th May 2021)

  4. #3
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    Default Re: Sending multiple Canframes and processing it at the same time

    Problem solved. Had a blocking function from another class.

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