[Qt-interest] enter key event to serial communication

[Yuvraj]

Arnold Krille wrote:
> On Monday 22 February 2010 09:20:19 Yuvraj wrote:
>   
>> Arnold Krille wrote:
>>     
>>> On Monday 22 February 2010 07:39:22 Yuvraj wrote:
>>>       
>>>> Bradley T. Hughes wrote:
>>>>         
>>>>> On 02/19/2010 02:56 PM, Yuvraj wrote:
>>>>>           
>>>>>> Hi all
>>>>>>
>>>>>> How do i send a enter key event to serial communication devices?
>>>>>>             
>>>>> No offense, I don't see how this relates to Qt? Perhaps your question
>>>>> is best asked somewhere else (like a forum/mailing-list/news-group
>>>>> that specializes in serial communications?)
>>>>>           
>>>> No, my problem is sending enter key value(  QT  related). when i am
>>>> pressing the push-button i am doing below mentioned task..
>>>>
>>>> QString crlf;
>>>>     crlf = 0x0d;  // enter key value
>>>>     QString data1 = ui->send_text->text().append(crlf);
>>>>     com.writeData(data1.toLatin1(),100);
>>>>      ui->send_text->clear();
>>>>
>>>> but in receiver side it is waiting for enter key value ,once it get
>>>> enter key value , Then only it will do something
>>>>         
>>> Is "com" a QFile accessing the serial device? Then call "com.flush()" to
>>> make sure the data is written...
>>> But why are you doing "com.writeData( ..., 100 )" ? Surely your string
>>> isn't 100 chars long? Better do:
>>>
>>> QByteArray data1 = ui->send_text->text().toLatin1();
>>> data1.append(crlf);
>>> com.writeData(data1);
>>> com.flush();
>>> ui->send_text->clear();
>>>
>>> And maybe your crlf has the wrong value. Sometimes you can't even trust
>>> the documentation, I have seen devices only working with lf or crlf when
>>> the docs stated that it needs cr as line-end.
>>>       
>> Always i am getting some garbage value  at receiver side
>>     
>
> Garbage means a) wrong wiring (if it is more then two-cables) or b) wrong line 
> setup, that is wrong speed, wrong stop-bits, wrong parity...
>
> Arnold
>   
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yes, problem with setup only. i  solved that issue. but still problem 
with CRLF



Thanks

Yuvraj