Qt and COM port access

[wysota]

But "console" only switches the console subsystem in the compiler. Try disabling the console from Visual Studio settings (if you use VS) and see if the problem persists.

QExtSerialPort uses native serial communication as well so I'm not sure if using QExtSerialPort would change anything. IMO the problem is elsewhere.

[bnilsson]

Any hint on how to disable console in Visual Studio?
"Help" gives nothing.

[bnilsson]

I got the QExtSerialport example QESPTA built with VS and it is working with HyperTerminal.
I will try again with this and abandon my own COM port methods for the moment. My problems must be in my usage of the class.
Unfortunately, QESPTA is event driven and this is not supported in the POSIX implementatioin of QExtSerialport, so in my (working) POSIX code I am just using a timer to read and write to/from the port.
Annoying that this implementation works fine in POSIX but not in WIN32, for some reason.
I will have to use completely different code for WIN32 vs. POSIX, so it seems cross platform programming has its limitations.
Thanks for your patience.

[wysota]

Any hint on how to disable console in Visual Studio?
"Help" gives nothing.

It's somewhere in the compilation options. It's called "console subsystem".

[bnilsson]

Found it , thanks. It was in Linker/System settings.
Toggling /SUBSYSTEM:CONSOLE and /SUBSYSTEM:WINDOWS also toggles COMport working/not working.
I have no idea wether this is specific to Qt or not.

BN

[wysota]

It's not specific to Qt. QExtSerialPort works fine without the console subsystem. It has to be something in your code.