Virtual Serial Port on Mac OS X

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Jürgen
Jürgen 2012-11-21
Hello,
I have a question concerning the connection to virtual serial ports on Mac OS X! Is it possible to connect on Mac OS X to a serial Device called something like "/dev/ttys001" like it's on Linux, or is it needed to have a "/dev/tty.xxx" virtual device. I installed "socat" on osx for getting a virtual serial port, but this utility only generates port names the linux way.
Greets Jürgen
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Walter Roberson
Walter Roberson 2012-11-22
When you say "virtual serial" for this purpose, are you referring to ptty or are you referring to serial-over-USB ?
Jürgen
Jürgen 2012-11-22
I meant ptty. No external adapter or anything. The utility I use is "socat". The port is listed under ls /dev/tty* but when I try to open the Port, Matlab says it cannot find ttys001 and only shows me devices available nmed with tty.xxx or cu.xxx

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回答（2 个）

Walter Roberson
Walter Roberson 2012-11-22
I would expect /dev/pty* something. In particular, OS-X appears to use /dev/pty[p-w][0-9a-f]
Looking at http://cocoontech.com/forums/topic/19633-serial-to-ethernet-for-macs/ and the example linked to, it appears you would name one of those ports on the socat command line and have applications open it.
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Walter Roberson
Walter Roberson 2012-11-22
I remembered a hack that would work if you had a pair of real (physical) serial ports in your system, but it looks like you do not have that.
Jürgen
Jürgen 2012-11-22
编辑：Jürgen 2012-11-22
No I don't have something like that and it's only for educational purpose, but teh methd of serial port works perfectly unter Windows with Virtual Serial Port Driver from Eltima and I think it will also work with socat under Linux but just have to try it.
It would only be interesting if there is any way of tweaking Matlab the way to get also to work with virtual serial ports on Mac.

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Jürgen
Jürgen 2012-11-24
What I have found out so far is, that Matlab and other Applications will recognize virtual ports is, to create/emulate a hardware port with something like this http://com0com.sourceforge.net/ and then link the virtual ports from socat with the emulated hardware ...

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