Keithley 3700A Series, Справочное руководство

Страница: 493 / 936

Section 11: TSP command reference Series 3700A System Switch/Multimeter Reference Manual
11-114 3700AS-901-01 Rev. D/June 2018
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
Details
If the data queue is empty, the function waits up to the
timeout
value.
If data is not available in the data queue before the
timeout
expires, the return value is
nil
.
The entries in the data queue are removed in first-in, first-out (FIFO) order.
If the value is a table, a duplicate of the original table and any subtables is made. The duplicate table
does not contain any references to the original table or to any subtables.
Example
dataqueue.clear()
for i = 1, 10 do
dataqueue.add(i)
end
print("There are " .. dataqueue.count
.. " items in the data queue")
while dataqueue.count > 0 do
x = dataqueue.next()
print(x)
end
print("There are " .. dataqueue.count
.. " items in the data queue")
Clears the data queue, adds ten entries, then
reads the entries from the data queue. Note that
your output may differ depending on the setting of
format.asciiprecision
.
Output:
There are 10 items in the data queue
1
2
3
4
5
6
7
8
9
10
There are 0 items in the data queue
Also see
dataqueue.add() (on page 11-110)
dataqueue.CAPACITY (on page 11-111)
dataqueue.clear() (on page 11-112)
dataqueue.count (on page 11-113)
format.asciiprecision (on page 11-245)
Using the data queue for real-time communication (on page 10-61)