Section 8: TSP command reference
Model 2461 Interactive SourceMeter® Instrument Reference Manual
8-48
2461-901-01 A/November 2015
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
Power cycle
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
Also see
(on page 8-45)
(on page 8-46)
(on page 8-47)
(on page 8-48)
Using the data queue for real-time communication
(on page 3-158)
dataqueue.next()
This function removes the next entry from the data queue.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function
Yes
Usage
value
= dataqueue.next()
value
= dataqueue.next(
timeout
)
value
The next entry in the data queue
timeout
The number of seconds to wait for data in the queue
