QT transmitting large data over Serial Port
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I am trying to send a large amount of data via a QSerialPort (which actually goes over a RS232 connection). At present, I can get ~300 bytes of 80000 bytes. Using Putty, I can see all the data being transmitted, so the problem is with the receiving code, I believe.
Receiver code:
m_serial->waitForReadyRead(1000);
m_serial->waitForBytesWritten(20);
const QByteArray data = m_serial->readAll();
Transmitter code:
QByteArray sendData;
sendData.setRawData((char *)dataBuf, m->bufSize + sizeof(*mHeader) + 1);
m_serial->write(sendData);
I get valid data if I send any amount of data (at least the data I get).
Is the only solution to break up the data into separate transmits?
EDIT: I should mention that I am using an async implementation (the one from QTs examples - the async terminal program. It only sends and recieves small amounts of data, though)
The program connects to the readData() function using:
connect(m_serial, &QSerialPort::readyRead, this, &MainWindow::readData);
qt serial-port
asked Nov 22 '18 at 15:21
HengyHengy
324
add a comment |
I am trying to send a large amount of data via a QSerialPort (which actually goes over a RS232 connection). At present, I can get ~300 bytes of 80000 bytes. Using Putty, I can see all the data being transmitted, so the problem is with the receiving code, I believe.
Receiver code:
m_serial->waitForReadyRead(1000);
m_serial->waitForBytesWritten(20);
const QByteArray data = m_serial->readAll();
Transmitter code:
QByteArray sendData;
sendData.setRawData((char *)dataBuf, m->bufSize + sizeof(*mHeader) + 1);
m_serial->write(sendData);
I get valid data if I send any amount of data (at least the data I get).
Is the only solution to break up the data into separate transmits?
EDIT: I should mention that I am using an async implementation (the one from QTs examples - the async terminal program. It only sends and recieves small amounts of data, though)
The program connects to the readData() function using:
connect(m_serial, &QSerialPort::readyRead, this, &MainWindow::readData);
qt serial-port
asked Nov 22 '18 at 15:21
HengyHengy
324
If you are using the asynchronous example, you should NOT be using waitForXYZ methods, using them together with signals/slots leads to undefined behaviour. Other than that your example does not give enough information / working code to reproduce.
– markus-nm
Nov 23 '18 at 14:06
add a comment |
I am trying to send a large amount of data via a QSerialPort (which actually goes over a RS232 connection). At present, I can get ~300 bytes of 80000 bytes. Using Putty, I can see all the data being transmitted, so the problem is with the receiving code, I believe.
Receiver code:
m_serial->waitForReadyRead(1000);
m_serial->waitForBytesWritten(20);
const QByteArray data = m_serial->readAll();
Transmitter code:
QByteArray sendData;
sendData.setRawData((char *)dataBuf, m->bufSize + sizeof(*mHeader) + 1);
m_serial->write(sendData);
I get valid data if I send any amount of data (at least the data I get).
Is the only solution to break up the data into separate transmits?
EDIT: I should mention that I am using an async implementation (the one from QTs examples - the async terminal program. It only sends and recieves small amounts of data, though)
The program connects to the readData() function using:
connect(m_serial, &QSerialPort::readyRead, this, &MainWindow::readData);
qt serial-port
asked Nov 22 '18 at 15:21
HengyHengy
324
I am trying to send a large amount of data via a QSerialPort (which actually goes over a RS232 connection). At present, I can get ~300 bytes of 80000 bytes. Using Putty, I can see all the data being transmitted, so the problem is with the receiving code, I believe.
Receiver code:
m_serial->waitForReadyRead(1000);
m_serial->waitForBytesWritten(20);
const QByteArray data = m_serial->readAll();
Transmitter code:
QByteArray sendData;
sendData.setRawData((char *)dataBuf, m->bufSize + sizeof(*mHeader) + 1);
m_serial->write(sendData);
I get valid data if I send any amount of data (at least the data I get).
Is the only solution to break up the data into separate transmits?
EDIT: I should mention that I am using an async implementation (the one from QTs examples - the async terminal program. It only sends and recieves small amounts of data, though)
The program connects to the readData() function using:
connect(m_serial, &QSerialPort::readyRead, this, &MainWindow::readData);
qt serial-port
qt serial-port
asked Nov 22 '18 at 15:21
HengyHengy
324
asked Nov 22 '18 at 15:21
HengyHengy
324
edited Nov 22 '18 at 16:09
Hengy
asked Nov 22 '18 at 15:21
HengyHengy
324
asked Nov 22 '18 at 15:21
HengyHengy
324
asked Nov 22 '18 at 15:21
HengyHengy
324
324
If you are using the asynchronous example, you should NOT be using waitForXYZ methods, using them together with signals/slots leads to undefined behaviour. Other than that your example does not give enough information / working code to reproduce.
– markus-nm
Nov 23 '18 at 14:06
add a comment |
If you are using the asynchronous example, you should NOT be using waitForXYZ methods, using them together with signals/slots leads to undefined behaviour. Other than that your example does not give enough information / working code to reproduce.
– markus-nm
Nov 23 '18 at 14:06
If you are using the asynchronous example, you should NOT be using waitForXYZ methods, using them together with signals/slots leads to undefined behaviour. Other than that your example does not give enough information / working code to reproduce.
– markus-nm
Nov 23 '18 at 14:06
If you are using the asynchronous example, you should NOT be using waitForXYZ methods, using them together with signals/slots leads to undefined behaviour. Other than that your example does not give enough information / working code to reproduce.
– markus-nm
Nov 23 '18 at 14:06
add a comment |
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If you are using the asynchronous example, you should NOT be using waitForXYZ methods, using them together with signals/slots leads to undefined behaviour. Other than that your example does not give enough information / working code to reproduce.
– markus-nm
Nov 23 '18 at 14:06