Wrong data from qextserialport

cdeady

using Qt4.7 on Windows, I have created and opened the serial port in event mode. when the device sends its data, I don't get the same values as sent.

Device sends:
0x5A 0xF2 0x01 0x04 0xb3

I receive:
0x5A 0xF2 0x40 0x41 0xF6

If I receive the data into Hyperterminal and save it to a file, I get the correct data. I don't see what I am doing wrong.

Any ideas?

Many thanks,
Craig

vezprog

Try flushing the port and clearing any buffers when necessary so none of the data is being mixed up.

Could you give a sample code of what your trying to do?

Also, how are you reading the data?

cdeady

creating the port:
@

    serialPort = new QextSerialPort(port, QextSerialPort::EventDriven);

@

where port is "COM26"

after the port is created, I set the baud, parity, stop_bits, flow control, etc.

opening the port:
@
serialPort->open(QIODevice::ReadWrite | QIODevice::Unbuffered);
@

I have tried it with Unbuffered and without

in the OnDataAvailable SLOT:
@

int avail = serialPort->bytesAvailable();

if(avail < 1) return;



QByteArray usbdata;

usbdata.resize(avail);

int read = serialPort->read(usbdata.data(), usbdata.size());

if(read<1) return;





for(i=0; i<usbdata.size(); i++)

{

    rx_char = usbdata[i];

@

process rx_char...

I have looked at usbdata (which is a QByteArray) and it has the data as I posted previously as the receive data. Also, rx_char of course gets the same data, just on char at a time.

kuzulis

Try using QSerialDevice 2.0.
Read this "thread":http://developer.qt.nokia.com/forums/viewthread/11634/#67246