Section 5: Reading buffers Model 2601B-PULSE System SourceMeter Instrument Reference Manual
5-14 2601B-PULSE-901-01A April 2020
-- Set buffer count to 100.
smua.measure.count = 100
-- Set measure interval to 0.1 s.
smua.measure.interval = 0.1
-- Select source voltage function.
smua.source.func = smua.OUTPUT_DCVOLTS
-- Output 1 V.
smua.source.levelv = 1
-- Turn on output.
smua.source.output = smua.OUTPUT_ON
-- Store current readings in buffer 1, voltage readings in buffer 2.
smua.measure.overlappediv(smua.nvbuffer1, smua.nvbuffer2)
-- Wait for buffer to fill.
waitcomplete()
-- Turn off output.
smua.source.output = smua.OUTPUT_OFF
-- Output buffer 1 readings 1 to 100.
printbuffer(1, 100, smua.nvbuffer1)
-- Output buffer 2 readings 1 to 100.
printbuffer(1, 100, smua.nvbuffer2)
Dynamically allocated buffer example
The programming example below illustrates how to store data to an allocated buffer called mybuffer.
The 2601B-PULSE stores 100 current readings in mybuffer and then recalls all the readings.
-- Restore 2601B-PULSE defaults.
smua.reset()
-- Select measure I autorange.
smua.measure.autorangei = smua.AUTORANGE_ON
-- Select measure V autorange.
smua.measure.autorangev = smua.AUTORANGE_ON
-- Select ASCII data format.
format.data = format.ASCII
-- Set buffer count to 100.
smua.measure.count = 100
-- Set measure interval to 0.1 s.
smua.measure.interval = 0.1
-- Select source voltage function.
smua.source.func = smua.OUTPUT_DCVOLTS
-- Output 1 V.
smua.source.levelv = 1
-- Turn on output.
smua.source.output = smua.OUTPUT_ON
-- Create a temporary reading buffer.
mybuffer = smua.makebuffer(smua.measure.count)
-- Store current readings in mybuffer.
smua.measure.overlappedi(mybuffer)
-- Wait for buffer to fill.
waitcomplete()
-- Turn off output.
smua.source.output = smua.OUTPUT_OFF
-- Output readings 1 to 100 from mybuffer.
printbuffer(1, 100, mybuffer)
-- Delete mybuffer.
mybuffer = nil
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