Chapter 2
NI 5450 Overview
NI PXIe-5450 User Manual
2-66
ni.com
3.
Fill the streaming waveform with initial data
—Call the niFgen
Write Waveform VI or the
niFgen_WriteWaveform
function to
write the first part of the waveform data to the streaming waveform in
onboard memory.
Tip
When transferring large blocks of waveform data, break the data into smaller blocks
and call the niFgen Write Waveform VI or the
niFgen_WriteWaveform
function
multiple times. The data is appended sequentially. A computer can allocate smaller blocks
of a large waveform faster than allocating a single large contiguous block in memory.
Depending on the amount of RAM on the computer, transferring ten 16 MB blocks may be
faster than transferring one 160 MB block.
1.6 GB W
a
veform
160 MB
160 MB
Write Fir
s
t Portion
to On
b
o
a
rd Memory
