Connecting to the Device
Before you can use the serial port object to write or read data,
you must connect it to your device via the serial port specified in
the serial function. You connect
a serial port object to the device with the fopen function.
fopen(s)
Some properties are read only while the serial port object is
connected and must be configured before using fopen.
Examples include the InputBufferSize and
the OutputBufferSize properties.
To determine when you can configure a property, see Property Reference.
Note
You can create any number of serial port objects, but you can
connect only one serial port object per MATLAB session to a given
serial port at a time. However, the serial port is not locked by the
session, so other applications or other instances of MATLAB software
can access the same serial port, which could result in a conflict,
with unpredictable results. |
You can examine the Status property
to verify that the serial port object is connected to the device.
s.Status
ans =
open
As shown in the following illustration,
the connection between the serial port object and the device is complete;
data is readable and writable.
 | Creating a Serial Port Object | | Configuring Communication Settings |  |
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