[Interest] Parsing data from serialport

Martin Marmsoler martin.marmsoler at gmail.com
Mon Apr 8 22:59:23 CEST 2019

What is, when I ignore the ready read? Has the internal buffer a max size?
Because at the moment I have a memory leak and maybe it comes from that?


Am Fr., 5. Apr. 2019 um 21:12 Uhr schrieb Konstantin Shegunov <
kshegunov at gmail.com>:

> On Thu, Apr 4, 2019 at 6:42 PM Jérôme Godbout <godboutj at 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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