User`s manual

Writing and Reading Data

8-45

hfc =

par =

'NONE'

tm =

'LF'

4. Disconnect and clean up – When you no longer need s, you should

disconnect it from the instrument, and remove it from memory and from the

MATLAB workspace.

fclose(s)

delete(s)

clear s

Example: Reading Binary Data

This example illustrates how you can download the TDS 210 oscilloscope

screen display to MATLAB. The screen display data is transferred and saved

to disk using the Windows bitmap format. This data provides a permanent

record of your work, and is an easy way to document important signal and

scope parameters.

Since the amount of data transferred is expected to be fairly large, it is

asynchronously returned to the input buffer as soon as it is available from the

instrument. This allows you to perform other tasks as the transfer progresses.

Additionally, the scope is configured to its highest baud rate of 19,200.

1. Create a serial port object – Create the serial port object s associated with

serial port COM1.

s = serial('COM1');

2. Configure property values – Configure the input buffer to accept a

reasonably large number of bytes, and configure the baud rate to the highest

value supported by the scope.

s.InputBufferSize = 50000;

s.BaudRate = 19200;

3. Connect to the device – Connect s to the oscilloscope. Since the default

value for the

ReadAsyncMode property is continuous, data is asynchronously

returned to the input buffer as soon as it is available from the instrument.