Issue with QSerialPort (ubuntu)

[RSC9421]

Hello, I am writing a simple serial program that works fine on Windows, but not on Linux (Ubuntu) here is the code

Port1 = new QSerialPort ();
Foreach (const QSerialPortInfo & info, QSerialPortInfo :: availablePorts ()) {
Port_name = info.portName ();}
Port1-> setPortName (port_name);
Port1-> setBaudRate (38400);
Port1-> setDataBits (QSerialPort :: Data8);
Port1-> setStopBits (QSerialPort :: OneStop);
Port1-> setParity (QSerialPort :: NoParity);
Port1-> setFlowControl (QSerialPort :: NoFlowControl);

If (port1-> open (QIODevice :: ReadWrite)) {
Ui-> textEdit-> append ("Connected to" + port_name);
} Else {
Ui-> textEdit-> append ("Waiting ... \ n");}

textEdit show me connected to /dev/ttyUSB0 for example, but after 1 second this program it freezes, what should I do? regards

[mrjj]

Hi
You first check with other serial program that
/dev/ttyUSB0 does work.
Could be access issues.

[RSC9421]

yes, I try with cutecom and works

[mrjj]

Then it sounds like you have a normal bug in your program. :)
To test it, try the sample
http://doc.qt.io/qt-5/qtserialport-terminal-example.html

If that do not freeze,
its not something with Qt
but something you do in your own code and you
just need to find out what.

[jsulm]

@RSC9421 What do you do after connecting (after if (port1-> open (QIODevice :: ReadWrite)))?
It looks like your app is able to connect.

[RSC9421]

@mrjj The example run fine @jsulm After this I do not do anything, the code above is everything

[jsulm]

@RSC9421 Can you show the whole source code of your program?

[RSC9421]

Sorry for the delay, I did not have the internet ^^ Fortunately, I could fix it
I was compiling a similar project
The error was in the signal function "readyRead"
Thank you