How to control flow in QSerialPort?

Question

Qt

Hello.
There is a device based on ft232r, it requires flowControl settings in HardareControl to work.
I'm trying to communicate with him using Qt and QSerialPort, setting him

_serial->setFlowControl(QSerialPort::HardwareControl);

And now in confusion, I need to prescribe myself:

_serial->setRequestToSend(true);   // Устанавливаем готовность к передаче
while (  !_serial->pinoutSignals().testFlag(QSerialPort::ClearToSendSignal) ) {  processEvents(); } // Ждём ответа о готовности к приёму
_seria->write(data, size); //-- Пишем 
_serial->setRequestToSend(false); // Устанавливаем неготовность к передаче

Or does QSerialPort itself do it for me and just _serial.write(data, size) is enough?

Answer 1

https://doc.qt.io/qt-5/qserialport.html#requestToS...

Note: An attempt to control the RTS signal in the HardwareControl mode will fail with error code set to UnsupportedOperationError, because the signal is automatically controlled by the driver.