How to connect Matlab to a virtual serial port on the Mac?

I've set up a pair of virtual serial ports with which I am able to communicate via the Mac terminal, using 'screen /dev/master 9600' and 'screen /dev/slave 9600'. Unfortunately, I am completely unable to communicate with them using Matlab.

..I tried this:

serialport = serial('master');

set(serialport,'BaudRate',9600);

fopen(serialport);

fprintf(serialport,[1]);

.. and I get this:

Error using serial/fopen (line 72)
Open failed: Port: master is not available. Available ports:
/dev/tty.Bluetooth-Incoming-Port, /dev/cu.Bluetooth-Incoming-Port,
/dev/tty.Bluetooth-Modem, /dev/cu.Bluetooth-Modem.
Use INSTRFIND to determine if other instrument objects are connected to the
requested device.

.. please help..

Answer 1

[Walter Roberson]

It appears that on OS-X, /dev/tty.* is expected and in particular for USB, possibly only /dev/tty.usbserial-* . The newsreader thread might be useful in configuring.

http://www.mathworks.com/matlabcentral/fileexchange/31958-serialdatastream

http://www.mathworks.com/matlabcentral/answers/54435

http://www.mathworks.com/matlabcentral/newsreader/view_thread/235132

[Sonia]

Thanks for your help. Unfortunately I have not been able to resolve the issue.

To clarify, I am not using a USB device, only a virtual serial port between two pieces of software on the same machine. I have one program successfully listening to the paired port. I am hoping to get Matlab to act as an input, sending data through the virtual port. Unfortunately Matlab does not recognise the port. What you mentioned about tty.* appears to be the main issue.