Serial Port Reading problem

[norobro]

Maybe this is your problem. From the canReadLine() docs:

Note that unbuffered devices, which have no way of determining what can be read, always return false.

I communicate with an unbuffered device and if I were using your onReceive() function it would look something like this:

void Motor::onReceive()
    {
        QMutexLocker locker(&m);
        while(port->bytesAvailable()< RX_BUF_SIZE) {} //wait for data
 
            char tmp[RX_BUF_SIZE];
            qint64 len = port->read(tmp, RX_BUF_SIZE); //use read instead of readline
            data.fromRawData(tmp,len);
 
            quint8 fault = 0;
 
// do something with the data before
// clearing the buffer
 
            data.clear();
 
            rxcnt++;
        }
}

void Motor::onReceive()
    {
        QMutexLocker locker(&m);
        while(port->bytesAvailable()< RX_BUF_SIZE) {} //wait for data

            char tmp[RX_BUF_SIZE];
            qint64 len = port->read(tmp, RX_BUF_SIZE); //use read instead of readline
            data.fromRawData(tmp,len);

            quint8 fault = 0;

// do something with the data before
// clearing the buffer

            data.clear();

            rxcnt++;
        }
}

To copy to clipboard, switch view to plain text mode