Find visible and hidden serial port objects
out = instrfindall
out = instrfindall('P1',V1,...)
out = instrfindall(s)
out = instrfindall(objs,'P1',V1,...)
out = instrfindall finds
all serial port objects, regardless of the value of the object's ObjectVisibility property.
The object or objects are returned to out.
out = instrfindall(' returns
an array, P1',V1,...)out, of serial port objects whose property
names and corresponding property values match those specified as arguments.
out = instrfindall(s) returns
an array, out, of serial port objects whose property
names and corresponding property values match those specified in the
structure s, where the field names correspond to
property names and the field values correspond to the current value
of the respective property.
out = instrfindall(objs,' restricts
the search for objects with matching property name/value pairs to
the serial port objects listed in P1',V1,...)objs.
Note that you can use string property name/property value pairs,
structures, and cell array property name/property value pairs in the
same call to instrfindall.
Suppose you create the following serial port objects on a Windows® platform:
s1 = serial('COM1'); s2 = serial('COM2'); set(s2,'ObjectVisibility','off')
Because object s2 has its ObjectVisibility set
to 'off', it is not visible to commands like instrfind:
instrfind
Serial Port Object : Serial-COM1
However, instrfindall finds all objects
regardless of the value of ObjectVisibility:
instrfindall
Instrument Object Array Index: Type: Status: Name: 1 serial closed Serial-COM1 2 serial closed Serial-COM2
The following statements use instrfindall to
return objects with specific property settings, which are passed as
cell arrays:
props = {'PrimaryAddress','SecondaryAddress};
vals = {2,0};
obj = instrfindall(props,vals);You can use instrfindall as an argument
when you want to apply the command to all objects, visible and invisible.
For example, the following statement makes all objects visible:
set(instrfindall,'ObjectVisibility','on')