Read binblock data from instrument
A = binblockread(obj)
A = binblockread(obj,'
[A,count] = binblockread(...)
[A,count,msg] = binblockread(...)
An interface object.
The number of bits read for each value, and the interpretation of the bits as character, integer, or floating-point values.
Binblock data returned from the instrument.
The number of values read.
A message indicating if the read operation was unsuccessful.
A = binblockread(obj) reads
binary-block (binblock) data from the instrument connected to
returns the values to
A. The binblock format is
described in the
A = binblockread(obj,' reads
binblock data translating the MATLAB® values to the precision
precision. By default the
is used and numeric values are returned in double-precision arrays.
Refer to the
for a list of supported precisions.
[A,count] = binblockread(...) returns
the number of values read to
[A,count,msg] = binblockread(...) returns
a warning message to
msg if the read operation
did not complete successfully.
Create the GPIB object
g associated with
a National Instruments® GPIB controller with board index 0, and
a Tektronix® TDS 210 oscilloscope with primary address 2.
g = gpib('ni',0,2); g.InputBufferSize = 3000;
g to the instrument, and write string
commands that configure the scope to transfer binary waveform data
from memory location A.
fopen(g) fprintf(g,'DATA:DESTINATION REFA'); fprintf(g,'DATA:ENCDG SRPbinary'); fprintf(g,'DATA:WIDTH 1'); fprintf(g,'DATA:START 1');
CURVE? command, which prepares
the scope to transfer data, and read the data using the binblock format.
fprintf(g,'CURVE?') data = binblockread(g);
Before you can read data from the instrument, it must be connected
obj with the
A connected interface object has a
open. An error is returned if you attempt
to perform a read operation while
obj is not connected
to the instrument.
binblockread blocks the MATLAB Command Window until one of the following occurs:
The data is completely read.
The time specified by the
msg is not included as an output argument
and the read operation was not successful, then a warning message
is returned to the command line.
Each time binblockread is issued, the
value is increased by the number of values read.
Some instruments may send a terminating character after the
binblock. binblockread will not read the terminating
character. You can read the terminating character with the
fread function. Additionally, if
a GPIB, VISA-GPIB, VISA-VXI, VISA-USB, or VISA-RSIB object, you can
to remove the terminating character.
Note: To get a list of options you can use on a function, press the Tab key after entering a function on the MATLAB command line. The list expands, and you can scroll to choose a property or value. For information about using this advanced tab completion feature, see Using Tab Completion for Functions.