flush

Clear buffers for communication with VISA resource

Since R2021a

Syntax

flush(v)

flush(v,"input")

flush(v,"output")

flush(v) flushes all data from both the input and output buffers of the VISA resource v and clears the hardware output buffer of the instrument.

flush(v,"input") flushes only the input buffer of the VISA resource.

flush(v,"output") flushes only the output buffer of the VISA resource.

Create a connection to a VISA resource. This example shows a connection to a device with the alias COM4 using the VISA-Serial interface.

v = visadev("COM4");

Write some data to the device and view the number of bytes available to be read in the input buffer.

write(v,1:5,"uint8")
v.NumBytesAvailable

ans =

     5

Flush both the input and output buffers.

flush(v)

View the number of bytes available to be read.

v.NumBytesAvailable

ans =

     0

The input buffer has no data.

VISA resource, specified as a visadev object.

Example: flush(v) flushes data from the VISA resource v.

Introduced in R2021a