Qt Serial Port: Fast Large Data Reception

1 year ago
Benjamin Taylor
2 minutes

To receive large amounts of fast data, you can utilize Qt’s serial communication class QSerialPort.

Here is an example code that is capable of receiving a large amount of data quickly.

#include <QCoreApplication>
#include <QSerialPort>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QSerialPort serialPort;
    serialPort.setPortName("COM1"); // 设置串口名
    serialPort.setBaudRate(QSerialPort::Baud115200); // 设置波特率
    serialPort.setDataBits(QSerialPort::Data8); // 设置数据位
    serialPort.setParity(QSerialPort::NoParity); // 设置校验位
    serialPort.setStopBits(QSerialPort::OneStop); // 设置停止位

    if (!serialPort.open(QIODevice::ReadOnly)) {
        qDebug() << "Failed to open serial port!";
        return -1;
    }

    const int bufferSize = 1024; // 缓冲区大小
    char buffer[bufferSize];
    qint64 bytesRead = 0;

    while (true) {
        bytesRead = serialPort.read(buffer, bufferSize);
        // 在这里处理读取到的数据
        // 可以将读取到的数据写入文件，进行解析等操作

        qDebug() << "Read" << bytesRead << "bytes from serial port";
    }

    return a.exec();
}

In the code above, a QSerialPort object is first created, then the serial port parameters are set, such as the port name, baud rate, data bits, etc. Finally, the serial port is opened by calling the open() function.

Then create a buffer to store the data read. Inside an infinite loop, call the read() function to read data from the serial port and print the data obtained through debug information. In practical applications, the data can be parsed and processed as needed.

The above is a simple example of receiving a large amount of data quickly, which you can modify and expand based on your needs.

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