基于QT使用C++编程实现E5071C 屏幕截图如何保存到PC
时间: 2024-01-19 14:05:06 浏览: 178
要基于 Qt 使用 C++ 编程实现 E5071C 屏幕截图保存到 PC 上,您可以使用 Qt 的 QSerialPort 类与仪器进行通信,并将屏幕截图保存到 PC 上。以下是实现的基本步骤:
1. 使用 Qt 的 QSerialPort 类连接到 E5071C 仪器。您需要设置端口、波特率、数据位、校验位等参数,并打开串口。
2. 发送 SCPI 命令 "HCOP:DEV:LANG PNG",将屏幕截图格式设置为 PNG。
3. 发送 SCPI 命令 "HCOP:DEST 'MMEMory:STORe:IMAGe',将屏幕截图保存到仪器的内存中。
4. 发送 SCPI 命令 "MMEM:DATA? 'MMEMory:STORe:IMAGe'",从仪器的内存中读取屏幕截图数据。
5. 将读取的数据保存到 PC 上的文件中,例如 "screen.png"。
以下是使用 QSerialPort 类实现的示例代码:
```cpp
// Include Qt header files
#include <QCoreApplication>
#include <QtSerialPort/QSerialPort>
#include <QtSerialPort/QSerialPortInfo>
#include <QDebug>
#include <QFile>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
// Open serial port
QSerialPort serialPort;
serialPort.setPortName("COM1");
serialPort.setBaudRate(QSerialPort::Baud115200);
serialPort.setDataBits(QSerialPort::Data8);
serialPort.setParity(QSerialPort::NoParity);
serialPort.setStopBits(QSerialPort::OneStop);
serialPort.setFlowControl(QSerialPort::NoFlowControl);
if (!serialPort.open(QIODevice::ReadWrite))
{
qDebug() << "Failed to open serial port";
return 1;
}
// Set screenshot format to PNG
serialPort.write("HCOP:DEV:LANG PNG\n");
if (!serialPort.waitForBytesWritten(1000))
{
qDebug() << "Failed to set screenshot format";
serialPort.close();
return 1;
}
// Save screenshot to instrument memory
serialPort.write("HCOP:DEST 'MMEMory:STORe:IMAGe'\n");
if (!serialPort.waitForBytesWritten(1000))
{
qDebug() << "Failed to save screenshot to instrument memory";
serialPort.close();
return 1;
}
// Read screenshot data from instrument memory
serialPort.write("MMEM:DATA? 'MMEMory:STORe:IMAGe'\n");
if (!serialPort.waitForBytesWritten(1000))
{
qDebug() << "Failed to read screenshot data";
serialPort.close();
return 1;
}
if (!serialPort.waitForReadyRead(1000))
{
qDebug() << "Failed to read screenshot data";
serialPort.close();
return 1;
}
QByteArray data = serialPort.readAll();
// Save screenshot data to file
QFile file("screen.png");
if (file.open(QIODevice::WriteOnly))
{
file.write(data);
file.close();
qDebug() << "Screenshot saved to file: screen.png";
}
else
{
qDebug() << "Failed to save screenshot to file";
}
// Close serial port
serialPort.close();
return a.exec();
}
```
请注意,此示例代码仅供参考,实际实现可能会因具体情况而有所不同。
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