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Chapter 2 Function Reference — DIG_Block_In
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National Instruments Corporation 2-151 NI-DAQ FRM for PC Compatibles
you must use the value of alignIndex return by Align_DMA_Buffer to access your data. In
other words, data in an aligned buffer begins at buffer[alignIndex]. Data in an unaligned
buffer begins at buffer [0].
Note DIG_Block_In will not work with groups of size = 1, because of a DMA limitation
when using the AT-DIO-32F.
Note If you are using an SCXI-1200 with remote SCXI, count is limited by the amount
of memory made available on the remote SCXI unit. For digital buffered input,
you are limited to 5,000 bytes of data. The upper bound for count depends on the
groupSize set in
DIG_SCAN_Setup (for example, if groupSize = 2, count ≤ 2,500).