Instrument Control Toolbox

Example: Parsing Input Data Using scanstr

This example illustrates how to use the scanstr function to parse data that you read from a Tektronix TDS 210 oscilloscope. scanstr is particularly useful when you want to parse a string into one or more cell array elements, where each element is determined to be either a double or a string.

1. Create an instrument object -- Create the GPIB object g associated with a National Instruments GPIB controller with board index 0, and an instrument with primary address 1.

• g = gpib('ni',0,1);
  

2. Connect to the instrument -- Connect g to the oscilloscope.

• fopen(g)
  

3. Write and read data -- Return identification information to separate elements of a cell array using the default delimiters.

• fprintf(g,'*IDN?');
  idn = scanstr(g)
  idn = 
      'TEKTRONIX'
      'TDS 210'
      [        0]
      'CF:91.1CT FV:v1.16 TDS2CM:CMV:v1.04'
  

4. Disconnect and clean up -- When you no longer need g, you should disconnect it from the instrument, and remove it from memory and from the MATLAB workspace.

• fclose(g)
  delete(g)
  clear g
  

Example: Reading Binary Data

Example: Understanding EOI and EOS