[Qt-interest] serial communication, RTS and DTR

[HardMaker]

Hi,
I'm trying to make a serial comunication too and I need to control the 
RTS and DTR lines. Not for make a hardware hand shaking, yust I wan't to 
drive this lines and send and recive data trow the serial port as 
diferents things.
As you suggest, I try QextSerialPort from google and use this code on 
linux to initialize the port:

    QextSerialPort serial = new QextSerialPort();
    serial->setBaudRate(BAUD9600);
    serial->setFlowControl(FLOW_OFF);
    serial->setParity(PAR_NONE);
    serial->setDataBits(DATA_8);
    serial->setStopBits(STOP_2);

but when I press a button to execute this code:

  serial->setRts(true);
or
  serial->setRts(false);

Nothing happend, I'm using a digital voltimeter conected to RTS and 
don't change. But, if use other applications  it's ok  (the hardware work).
Can helpme?

Thank's

Sergio

Yuvraj escribió:
> Denis Akhmetzyanov wrote:
>   
>> Hi,
>> I suggest you to try 
>> QextSerialPort http://code.google.com/p/qextserialport/ instead of the 
>> native calls. It is a convenient class implements QIODevice and 
>> supports signal/slot technology and asynchronous calls.
>>
>>
>> 2010/3/30 Yuvraj <yuvraj.ragupathi at indieontech.com 
>> <mailto:yuvraj.ragupathi at indieontech.com>>
>>
>>      Hi ,
>>
>>     Here i am opening the serial communication device file and writing
>>     some data, in other hand i am not getting the data due to enter
>>     key( "/r/n")
>>
>>     my code is
>>      
>>      file_descriptor = open("/dev/ttyS0",O_RDWR);
>>         if(file_descriptor > 0)
>>         {
>>              timer = new QTimer;
>>             timer1 =new QTimer;
>>            
>>     QObject::connect(timer,SIGNAL(timeout()),this,SLOT(browser_append()));
>>            
>>     QObject::connect(timer1,SIGNAL(timeout()),this,SLOT(on_send_clicked()));
>>             timer->start(1);
>>             timer1->start(10);
>>         }
>>         else
>>         {
>>             QMessageBox::information(0,"","Connection failed");
>>         }
>>
>>
>>     void  window::on_send_clicked()
>>     {
>>          int file_id;
>>        char send_data[150]= "Hi Hello\r\n";
>>         if(file_descriptor > 0)
>>         {
>>            file_id= write(file_descriptor,send_data,15);
>>            ui->send_text->clear();
>>            ui->send_text->setFocus(); 
>>            if(file_id > 0)
>>            {
>>                qDebug()<<"Data successfully written \n";
>>            }
>>           
>>
>>         }
>>       
>>     }
>>
>>     any  ideas?
>>
>>     Thanks
>>
>>     Yuvaraj R
>>
>>
>>     _______________________________________________
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>>
>>
>>     
> There itself i am facing  same issue (key enter )
>
> Thanks
> Yuvaraj
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