how to read and write in serial port in RHEL platform?

[mrjj]

@Nimika
Well code looks fine - so in what way does it not work?

Can u read anything at all?

Without the actual code you are using , its impossible to give guesses.

[Nimika]

@mrjj Except port name I gave you the code which I am running.
There is no output at all in display. Thats why I am confused that evrythin gis correct so where I did any mistake (if any).
Even when I am running any QT example program like CREADERSYNC or any other, still there is no output.
So is there any problem in QT??
As I have used different computers for different versions of Qt and still I am getting the same problem.

[mrjj]

I highly doubt it has anything to do with Qt.
Why dont you try minicom or other serial program and see if you can read anything.

[Nimika]

@mrjj
yeah I have used other serial programs too but still no answer.
:(

[mrjj]

@Nimika
But then it means that your serial is simply not working or
what ever that should answer/send is not doing it.
If its not working with other serial program, it wont work with Qt either.

So you must find out what part is not working.

Does the other end even try to send something?`

http://www.cyberciti.biz/faq/find-out-linux-serial-ports-with-setserial/

[SGaist]

Hi,

Maybe a silly question but: do you have anything connected on that port ? How should it answer ?

[Nimika]

@SGaist
There is nothing else connected to that port.
I have mentioned you what I did...

[Nimika]

Hello All,
My problem is resolved.
There is some timing mismatch thats all.
Thank you!

[SGaist]

You mentioned what you coded not what you had connected to the serial port whether it is another computer or a device. If you did then sorry I didn't saw it.

[Nimika]

@SGaist
It's ok if you have not noticed it that I was doing the connection in the same computer which is wrong.
Thank you!