UART至Qt软件错误-为什么数据总是分裂? [英] UART to Qt software error - why data always split?

问题描述

我很想在我的Qt应用程序上显示通过UART接收到的数据. 我一次从微控制器发送了所有数据，但是我的qt应用程序却分成多个部分接收它，为什么?

I am tryig to display data I receive via UART on my Qt application. I send all my data from my microcontroller at once, but my qt application receives it in multiple parts why?

这就是我得到的: http://imgur.com/kLXRvU5 代替: http://imgur.com/h2yNZjl

this is what I get: http://imgur.com/kLXRvU5 in stead of: http://imgur.com/h2yNZjl

因此，每次我接收数据时，都会调用我的插槽函数，因此会调用接收到的数据".但是我的数据分为两部分.为什么要这样?

So every time I receive data my slot function gets called, hence the "data received". But my data is split in two parts. Why please?

我的代码:

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)//, mijnAnimatie(new animatie())
{  

    serialPort->setPortName("COM13");
        serialPort->setBaudRate(QSerialPort::Baud115200);

       // serialPort->setDataBits(QSerialPort::Data8);
       // serialPort->setParity(QSerialPort::NoParity);
       // serialPort->setStopBits(QSerialPort::OneStop);


        if (!serialPort->open(QIODevice::ReadWrite))
        {
         qDebug("some error when opening\n");
        }
        connect(serialPort, SIGNAL(readyRead()), this, SLOT(updateReceivedData()));

}

void MainWindow::updateReceivedData()
{
    qDebug("received data\n");
    QString m_readData;

    ui->receiveLabel->setText(m_readData);


      QByteArray result = serialPort->readAll();
      QString command(result); //to convert byte array to string
      qDebug()<<result;
      ui->receiveLabel->setText(command);
}

推荐答案

流式连接(例如TCP/IP或串行端口)为您提供零保证如何将数据切成碎片.如果需要数据包，则必须在流连接之上自己实现它们.

Streaming connections, like TCP/IP or serial ports, give you zero guaranties about how the data is cut up into pieces. If you want packets, you have to implement them yourself on top of a streaming connection.

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