Re: [Interest] FW: How can I implement QModbusClient for MODBUS ASCII mode?

2019-05-17 Thread Andre Hartmann 

Hi,

Modbus ASCII support is tracked as 
https://bugreports.qt.io/browse/QTBUG-51751


You can comment and vote there for that feature. And of course, if you 
like, you can contribute the missing code to Qt.


Regards,
André

Am 17.05.19 um 11:50 schrieb Olivier B.:

I actually don't understand what we can do for you if you don't know
how to do it. Do you want us to implement it for you?

You can use libmodbus and create classes around it. Or implement
modbus ascii in pure Qt

Le ven. 17 mai 2019 à 11:45, Олег Гаврильченко
 a écrit :




-Original Message-
From: Olivier B. [mailto:perso.olivier.barthel...@gmail.com]
Sent: Friday, May 17, 2019 12:19 PM
To: Олег Гаврильченко
Cc: Interests Qt
Subject: Re: [Interest] FW: How can I implement QModbusClient for MODBUS ASCII 
mode?

https://doc.qt.io/qt-5/qtserialbus-modbus-master-example.html
https://doc.qt.io/qt-5/qtserialbus-modbus-slave-example.html
https://sourceforge.net/projects/qmodmaster/

Le ven. 17 mai 2019 à 11:10, Олег Гаврильченко  a 
écrit :


Hello.

I want write QModbusClient/QModubsServer subclasses, that communicate via 
MODBUS ASCII mode.

How can I make this?

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You probably don't understand me. I see all this examples. All example use 
MODBUS RTU or MODUBS TCP protocol.
Only this protocols realized in QT in classes QModbusRtuSerialMaster and 
QModbusRtuSerialMaster. But I want to communicate via MODBUS ASDII mode.
MODBUS ASII mode not implement in QT. I asked, how I can make it?

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Re: [Interest] qt creator F10 is not working anymore

2019-04-29 Thread Andre Hartmann 

Hi Alexander,

please see https://bugreports.qt.io/browse/QTCREATORBUG-22330

Regards,
Andre

Am 29.04.19 um 09:48 schrieb Alexander Dyagilev:

hello,

i've just updated to 4.9

F10 (step over) is not working anymore in Debugger.

What happend?

Checked environment / keyboard settings - F10 is set to be used there.

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Re: [Interest] Parsing data from serialport

2019-04-09 Thread Andre Hartmann 

Hi Martin,

What is, when I ignore the ready read? 


The data will stay in the buffer, of course.

Has the internal buffer a max size? 


Your RAM or 2^32, whichever is lower.

Because at the moment I have a memory leak and maybe it comes from 
that?


I doubt that. A leak would mean, you cannot use the data anymore, which 
is wrong here - you just need to fetch the data from the buffer.


Regards,
André



Martin

Am Fr., 5. Apr. 2019 um 21:12 Uhr schrieb Konstantin Shegunov 
mailto:kshegu...@gmail.com>>:


On Thu, Apr 4, 2019 at 6:42 PM Jérôme Godbout mailto:godbo...@amotus.ca>> wrote:

You jus did the same loop into your slot, the function I did
made can be called as slot to the connect you just told, I agree
the serial_port->waitForReadyRead(5); is not necessary, just
often the transmission have partial or bunch of data by small
burst (USB VCOM) and was handy for me, but it is not ncessary in
any way.

A similar loop yes, however your loop goes until there's something
to read on the port, mine is run a few times only when the port
already has some information pending in its buffer. The QSerialPort
class already knows if data has arrived and buffers it*, so what
would be the point to loop over the port when there's no data? When
you talk with someone do you ask every 5ms if [s]he has something to
say to you? I really doubt it. You'd normally just wait for
something to be said to decide if and how to respond to it.

Side note: ReadLines made it less general purpose, you will need
a protocol that use endline to signal end of message which is
not always the case.

Involving realistic protocol handling is another kettle of fish. It
would require much more thought and effort and is beyond the scope
of what was asked initially.

* Unless it's in unbuffered mode, as Thiago already noted.

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