[Solved]: Two different handler for same ready read signal in serial communication.

[nasit.bhavin]

I am working with USB port as well as D-sub port(both are serial ports) at a time.
Does anybody knows how to make two handler for same ready read signal in serial communication? May be identifying the ports which generates ready read signals..!!!

Thanks in advance.

[wspilot]

I just started working on it (Linux), and I am using "QtSerialPort":http://qt-project.org/wiki/QtSerialPort.
also "getting it to work":http://qt-project.org/forums/viewthread/23839/

[nasit.bhavin]

I am using qextserialport (third party library) for serial communication.

[tobias.hunger]

Why don't you have one slots per port (connected to one read-ready signa)l. Those extract the data from the port and put it into a QByteArray which is then handed over to another method that does the actual processing?

[nasit.bhavin]

That's exactly my point. How will I come to know that which port has generated the ready read signal?

Actually, I am using USB port for some modules and D-sub port for to connect another industrial PC (same as normal computer) and I have to use both at a time. Now to work with both serial ports at a time, How to differentiate both? so that I can identify port which has generated ready read signal and can use appropriate handler.

Thanks for you reply.

[tobias.hunger]

You connect the one object's readReady signal to one slot and the other object's readReady signal to another one. I am afraid I do not understand the question:-)

[nasit.bhavin]

Mine agenda was to use only one object for serial communication as I have developed few common functions like OpenPort(), WriteData()...
If I use more objects then there is no use of my common functions as I have to check weather perticular port is opened or not..!!!
e.g
@
qint64 SerialPort::WriteData(QString message)
{
if(port->isOpen())
{
QByteArray msg_ascii = message.toAscii();
qint64 total=port->write(msg_ascii,msg_ascii.length());
port->flush();
}
else
return 0;
}
@
[edit, code tags added, koahnig]

[koahnig]

I guess you are confusing class and object in your posting.
[quote]
A class is an expanded concept of a data structure: instead of holding only data, it can hold both data and functions.

An object is an instantiation of a class. In terms of variables, a class would be the type, and an object would be the variable.[/quote] This is copied from "here":http://www.cplusplus.com/doc/tutorial/classes/

What you want to do is having a common class definition with a method handling in both cases the readyRead signal.

You could have something similar to this:
@
class MySerialClass : public QExtSerialPort
{
public slots:
void sltReadyReadHandling (...);
};
@

In your application you may have then:
@
MySerialClass UsbPort;
MySerialClass DSubPort;

....
@

[nasit.bhavin]

Thanks kohnig,

I solved the problem as well as confusion..!!!