Linux – Converting the /dev/ttyUSB to com port to use it with Wine in Linux

linuxserial portwine

I have some software which runs on Windows. I installed Wine and ran it in Linux. It works fine but the issue is it communicates with a serial port. Therefore the only option I can choose are com1, com2, …

But my device on the Linux machine is actually located at the /dev/ttyUSBn location. How do I use the above software in Linux Ubuntu?

I have tried ln -s /dev/ttyUSBn COM1 in the ~/.wine/dosdevices/. It does not appear to work.

Best Answer

Starting from Wine 2.8, the simple symlink-editing method of configuration doesn't work. One has to configure COM ports by editing Wine registry. From Wine User's Guide/Other Things to Configure/Serial and Parallel Ports:

To override Wine's default device mapping, run wine regedit and create string entries in HKEY_LOCAL_MACHINE\Software\Wine\Ports where the entry name is the Windows device name and the entry value is the path to the Unix device. Continuing with the above example, to make COM1 the first USB-attached serial port, create an entry with the name COM1 and the value /dev/ttyUSB0. You might also want to create an entry named COM5 with no value to remove the COM5 device which is now a duplicate of COM1. After editing the registry, shut down Wine with wineserver -k and the next time Wine runs a program, your changes will take effect.

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I know this question is old and that goldenmean has probably either worked it out or moved on, but someone else may stumble upon this question looking for an answer.

Wine doesn't automatically assign Linux serial ports to COM ports for Windows programs, but it can be done with a simple symbolic link. For Wine, in a command terminal you do the following:

$ ln -s /dev/ttyS0 ~/.wine/dosdevices/com1
$ ln -s /dev/ttyS1 ~/.wine/dosdevices/com2

Repeat as necessary to get all the ttySx serial ports you need assigned to COMx ports.

The commercial version of Wine called Crossover Linux may provide GUI tools for this or do it automatically, but I've never used it.

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Without knowing either your set-top box or your cable, I would first try disabling hardware flow control, since the set top probably doesn't implement it. Essentially your Linux client is waiting for an "OK to send" signal that it will never receive because there's no physical wire in the set top to send it.

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