问读取串行数据的Qt .工作代码，但需要更可靠

EN

void loop(){

// I wait for trigger signal from PC, then begin data acquisition
// Data are acquired from a sensor, typically few thousand 16-bit values
// 1 kHz sampling rate, store data on SRAM chip

// Code below transfers data to PC
   for(unsigned int i=0;i<datalength;i++){

     // Get data from SRAM
     msb=SPI.transfer(0x00);
     lsb=SPI.transfer(0x00);        

     // Serial write
     Serial.write(msb);
     Serial.write(lsb);
     }
Serial.flush();

} // Loop over

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)  
{
ui->setupUi(this);

if(microcontroller_is_available){
   // open and configure serialport
    microcontroller->setPortName(microcontroller_port_name);
    microcontroller->open(QSerialPort::ReadWrite);
    microcontroller->setBaudRate(QSerialPort::Baud115200);
    microcontroller->setDataBits(QSerialPort::Data8);
    microcontroller->setParity(QSerialPort::NoParity);
    microcontroller->setStopBits(QSerialPort::OneStop);
    microcontroller->setFlowControl(QSerialPort::NoFlowControl);
    }

connect(microcontroller, &QSerialPort::readyRead, this, &MainWindow::readData);
}

void MainWindow::readData()  // Read in serial data bytes
{
    serialData += microcontroller->readAll();

    if(serialData.length()==2*datalength){ 
// Once all serial data received
// Do something, like save data to file, plot or process
}
}