QT 5.0 raspberry error with QSerialPort

[gillou]

Hi All,

I have this code for manage a fingerprint reader :

secugen.h

@class SecugenSda04 : public IFingerprint
{
Q_OBJECT
Q_INTERFACES(IFingerprint)
Q_ENUMS(ErrorReader)

public:
SecugenSda04(const QString &serialPort);
void setSerialPort(qint32 baudRate);

enum ErrorReader{
    _NONE = 0x00, // Performs the command received from main controller or host (no error)
};

private:
QSerialPort serial;
QByteArray response;
QString serialPort;
QTimer *timer;
QString characterToHexQString(const char character);
std::vector<int> intToHex(int id);
void executeCommand(const char cmd, DataContainer &dataContainer, const char param1Hight = 0x00, const char param1Low = 0x00, const char param2Hight = 0x00, const char param2Low = 0x00,const char lwExtraDataHight = 0x00,const char lwExtraDataLow = 0x00,const char hwExtraDataHight = 0x00,const char hwExtraDataLow = 0x00, quint32 baudRate = QSerialPort::Baud9600, QByteArray data= QByteArray());

//Test avec QextSerialPort
//QextSerialPort *port;

private slots:
void checkFingerTouch();

public slots:
void waitForFinger();

signals:
void resultReady(DataContainer *data);
void fingerDetected();

};
@

Constructor with some command of test

@SecugenSda04::SecugenSda04(const QString &serialPort): IFingerprint() {

serial.setPortName(serialPort);
// This command work and show the firmware version
executeCommand(0x05,dataContainer);


// This command change the com speed
DataContainer dataContainer;
executeCommand(0x21,dataContainer,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,QSerialPort::Baud115200);

[...]@

@void SecugenSda04::executeCommand(const char cmd, DataContainer &dataContainer, const char param1Hight, const char param1Low, const char param2Hight, const char param2Low ,const char lwExtraDataHight,const char lwExtraDataLow,const char hwExtraDataHight,const char hwExtraDataLow, quint32 baudRate, QByteArray data)
{
setSerialPort(baudRate);

const char channel = 0x00;
const char stub = 0x00;

int cks = ((int)cmd + (int)param1Hight + (int)param1Low + (int)param2Hight + (int)param2Low +(int)lwExtraDataLow + (int)lwExtraDataHight + (int)hwExtraDataLow + (int)hwExtraDataHight) % 256;
const char checkSum[] = { cks };

serial.write(&channel,1); // channel 1 byte (alway the same)
serial.write(&cmd,1); // command 1 byte
serial.write(&param1Low,1); // param1 2 bytes (byte low)
serial.write(&param1Hight,1); // param1 2 bytes (byte hight)
serial.write(&param2Low,1); // param2 2 bytes (byte low)
serial.write(&param2Hight,1); // param2 2 bytes (byte hight)
serial.write(&lwExtraDataLow,1); // lwExtraData 2 bytes (byte low)
serial.write(&lwExtraDataHight,1); // lwExtraData 2 bytes (byte hight)
serial.write(&hwExtraDataLow,1); // hwExtraData 2 bytes (byte low)
serial.write(&hwExtraDataHight,1); // hwExtraData 2 bytes (byte hight)
serial.write(&stub,1); // ErrorCode 1 byte
serial.write(&checkSum[0],1); // Checksum 1 byte

if(!data.isEmpty())
    serial.write(data.constData(),data.size());

if (serial.waitForBytesWritten(1000)) {

    qDebug() << "Serial data written on port" << serial.portName();

    QByteArray ack;

    while(ack.size() < 12)
        if(serial.waitForReadyRead(100))
            ack += serial.readAll();

    dataContainer.setAck(ack);

    if(dataContainer.error() == SecugenSda04::_NONE && dataContainer.packetSize() > 0)
    {
        qDebug() << "get the data packet on the serial port ...";

        QByteArray data = ack.right(ack.size() - 12);

        while(data.size() < dataContainer.packetSize())
            if(serial.waitForReadyRead(100))
                data += serial.readAll();
 
        if (data.size() > 0)
            dataContainer.setPacket(data);
    }
}

}
@

Initalise port like this :

@void SecugenSda04::setSerialPort(qint32 baudRate)
{
serial.setPortName(serialPort);

if(!serial.isOpen())
{
    if (!serial.open(QIODevice::ReadWrite)) {
        qCritical() << "error open : " << serial.errorString() << "(code : " << serial.error() << ")";
    }
}

if (!serial.setBaudRate(baudRate)) {
    qCritical() << "Can't set baud rate " << baudRate << " baud to port " << serialPort << ", error code " << serial.error();
}

if (!serial.setDataBits(QSerialPort::Data8)) {
    qCritical() << "Can't set 8 data bits to port " << serialPort << ", error code " << serial.error();
}

if (!serial.setParity(QSerialPort::NoParity)) {
    qCritical() << "Can't set no patity to port " << serialPort << ", error code " << serial.error();
}

if (!serial.setStopBits(QSerialPort::OneStop)) {
    qCritical() << "Can't set 1 stop bit to port " << serialPort << ", error code " << serial.error();
}

if (!serial.setFlowControl(QSerialPort::NoFlowControl)) {
    qCritical() << "Can't set no flow control to port " << serialPort << ", error code " << serial.error();
}

}@

problem : When i change the variable "quint32 baudRate" from QSerialPort::Baud9600 to QSerialPort::Baud115200 the fingerprint reader is blocked on reading ... i known the serial port is not closed in this version but it's the same thing with a serial.close()

I have try a LOT OF THING :

• close the port and reopen with other baud value
• update to the last QSerialPort
• reset the port
• clear the port
• try to another baud rate (work only in 9600)

sorry for this code i´m a noob in C++, if you have som advise for a new code, or something to help me ...
the same command 0x21 work like a charm on windows to change the com speed