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  1. Qt
  2. QTBUG-79962

modbus examples in Qt 5.12.4 working but in Qt 5.12.5 not working

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P1: Critical
    • Resolution: Fixed
    • Affects Version/s: 5.12.5
    • Fix Version/s: None
    • Component/s: SerialBus: MOD Bus
    • Labels:
      None
    • Environment:
      Qt Creator 4.10.0
    • Platform/s:
      Windows

      Description

      "Modbus Master example" and "Modbus Slave example" in serial port not working.

      monitoring serial port but only first time send requst.

       

      windows 7 64bit 

      MinGW 32bit

       

      qt 5.12.4 : working

      qt 5.12.5 : not working

       

      --------

      update:

      find :

      https://code.qt.io/cgit/qt/qtserialport.git/commit/src/serialport/qwinoverlappedionotifier.cpp?h=5.12.5&id=85ee2c658a45d2958a54045951d236769640337f

      write function in QSerialPort Qt 5.12.4 without waitForBytesWritten, write data but in Qt 5.12.5 dont write data.

       

      in file qmodbusrtuserialmaster_p.h ( https://code.qt.io/cgit/qt/qtserialbus.git/tree/src/serialbus/qmodbusrtuserialmaster_p.h?h=5.12.5 )after line 308 must be write

      m_serialPort->waitForBytesWriten();

       

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            Assignee:
            heimrich Karsten Heimrich
            Reporter:
            dorche ali panahi
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              Created:
              Updated:
              Resolved:

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