QSerialPort open

[A Former User]

i tried, but failed. Could U give a simple example ? Thank you

[A Former User]

i tried, but failed. Could U give a simple example ? Thank you
[quote author="raven-worx" date="1386321238"]first uncomment line 1 in your main() ;)
on the return do app.exec() instead of returning 0

Also you need to move the implementation of your serial port to an object which lives in the Qt event loop. If you use a gui simply add it into a widget. If not just use an QObject which does the work instead doing all in the main function.[/quote]

[SGaist]

Hi,

What did fail ?

Since you are not using any GUI element you can use a QCoreApplication

[kuzulis]

BTW: This is not the QSerialPort issue.. :)

[A Former User]

Does it work without Qt event loop environment?
[quote author="SGaist" date="1386331898"]Hi,

What did fail ?

Since you are not using any GUI element you can use a QCoreApplication[/quote]

[raven-worx]

it works without an event loop when you only use the blocking methods (all waitXXX() methods).
Maybe in your case it's enough to just instantiate the Q(Core)Application?

[A Former User]

yes, you are right.
[quote author="SGaist" date="1386331898"]Hi,

What did fail ?

Since you are not using any GUI element you can use a QCoreApplication[/quote]

[A Former User]

Atfer 2 places modified, it's ok now. But i've a new problem.
The following is the response, and the first line "ls" is the sent data.
Now i don't want the first line to be displayed, then how?

ls
bin lib mnt root tmp
dev linuxrc opt sbin usr
etc lost+found proc sys

[quote author="raven-worx" date="1386339040"]it works without an event loop when you only use the blocking methods (all waitXXX() methods).
Maybe in your case it's enough to just instantiate the Q(Core)Application?[/quote]

[SGaist]

Isn't that your device that echoes what it has received ?

[A Former User]

Ah, maybe, i'll check
[quote author="SGaist" date="1386578714"]Isn't that your device that echoes what it has received ?[/quote]