Tektronix Keithley SourceMeter 2470, Reference Manual

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2470 High Voltage SourceMeter Instrument Reference Manual Section 14: TSP command reference
2470-901-01 Rev. A /
May
2019 14-49
Example
MaxCount = dataqueue.CAPACITY
while dataqueue.count < MaxCount do
dataqueue.add(1)
end
print("There are " .. dataqueue.count
.. " items in the data queue")
dataqueue.clear()
print("There are " .. dataqueue.count
.. " items in the data queue")
This example fills the data queue and prints the
number of items in the queue. It then clears the
queue and prints the number of items again.
Output:
There are 128 items in the data
queue
There are 0 items in the data queue
Also see
dataqueue.add() (on page 14-47)
dataqueue.CAPACITY (on page 14-48)
dataqueue.count (on page 14-49)
dataqueue.next() (on page 14-50)
Using the data queue for real-time communication (on page 9-10)
dataqueue.count
This attribute contains the number of items in the data queue.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (R) Yes Not applicable Not applicable Not applicable
Usage
count = dataqueue.count
count The number of items in the data queue
Details
The count is updated as entries are added with
dataqueue.add()
and read from the data queue
with
dataqueue.next()
. It is also updated when the data queue is cleared with
dataqueue.clear()
.
A maximum of
dataqueue.CAPACITY
items can be stored at any one time in the data queue.
Example
MaxCount = dataqueue.CAPACITY
while dataqueue.count < MaxCount do
dataqueue.add(1)
end
print("There are " .. dataqueue.count
.. " items in the data queue")
dataqueue.clear()
print("There are " .. dataqueue.count
.. " items in the data queue")
This example fills the data queue and prints the number of items in the queue. It then clears the queue and
prints the number of items again.
Output:
There are 128 items in the data queue
There are 0 items in the data queue