QSerialPort High Speed Serial Reading from board and Logging Issue

[franbogaz]

Why are you using a QueuedConnection?

Cheers,
_

Nothing changed when i delete the QueuedConnection. I didn't put it on purpose. Just trying what i see on forums .

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Added after 7 minutes:

Error in reasoning.
1. During the operation of the data read by serial->readAll buffers appears next portion of the data that you delete in line 22.
2. The data you read in packs of random length (this is the nature of the serial port) and you lose "remain" the last byte.
3. The length of the data read by the serial->readAll () may be greater than serial-> bytesAvailable () read previously.

Hi again. I'm aware of losing byte because of "remain" but it is just 1 byte per package. (1 package loss in 500) But i tried your approach. I'm readAll to data to ArrayBuffer and i'm arranging my NumberOfBytesToRead = ArrayBuffer.size();
Actually it became more stable. But i got a problem now like that. First 2500 number is coming without any error then it is going like this : after 2500(number) is recevied -> 3500..3700 -> 7500..7800 -> 11000..12000 -> etc

I'm losing package in somewhere else and it became periodic.

Hi, franbogaz.

If I understood your problem well.
Perhaps your problem of loss of information is related to serial cable (manufacturing quality) or connection parameters.

I'm finding it strange that your serial connection configuration.
I've been searching the Internet and I think you should use the following:

1. serial-> setPortName ("COM7");
2. serial-> setBaudRate (19200); // Rate = 19200 * 3.32 * log (4) ... Rate = 38Kbps.
3. serial-> setDataBits (QSerialPort :: Data8);
4. serial-> setParity (QSerialPort :: NoParity);
5. serial-> setStopBits (QSerialPort :: OneStop);
6. serial-> setFlowControl (QSerialPort :: SoftwareControl); // Software flow control (XON / XOFF).
7. serial-> setReadBufferSize (400);

1. serial-> setPortName ("COM7");
2. serial-> setBaudRate (19200); // Rate = 19200 * 3.32 * log (4) ... Rate = 38Kbps.
3. serial-> setDataBits (QSerialPort :: Data8);
4. serial-> setParity (QSerialPort :: NoParity);
5. serial-> setStopBits (QSerialPort :: OneStop);
6. serial-> setFlowControl (QSerialPort :: SoftwareControl); // Software flow control (XON / XOFF).
7. serial-> setReadBufferSize (400);

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It is more common to use these settings to access equipment via the serial port

I tried what marcos.miranda said. Baudrate is still 600000 but flow control seems logical. When i tried softwareflowcontrol USB Serial Port stucks and not opening again or closing or receiving or sending data. I'm restarting pc and trying it again and it is same like this. Couldnt understand what's going on about flow control.