PIC18F4550 based serial ports under Windows 10

  1. Posts : 6
    Windows 10

    PIC18F4550 based serial ports under Windows 10

    Using VB6. These microprocessor based USB serial ports work on O/S prior to Win 10. MSCOMM32 fumbles along if your code is well wrapped in error handling. Moving to Win 10, MSCOMM32 doesn't recognize the port at all. Zip, nada. Code that used to enumerate serial ports (on earlier O/S) also fails to find the PIC18F4550 devices under Win 10. I have tried looking at the registry and at DCBs, but nothing. As a side note, the third party MSCOMM32 lookalike SCOMM32 works just fine on these devices under Win 10. It appears there's no third party driver involved as Microsoft provides the driver. So why are these particular devices invisible all of a sudden (all other types of USB serial devices I have continue to work as normal). TIA, Bob.
      My Computer

  2. Posts : 6
    Windows 10
    Thread Starter

    It's easy when you know how ...

    To answer my own question, it appears that Microsoft have put some USB serial ports in the USBDevice ClassGUID. So, rewriting the serial port enum code to look in both Ports and USBDevice classGUIDs worked for me.
      My Computer


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