User's Manual

Chapter 2 Function Reference — Set_DAQ_Device_Info
© National Instruments Corporation 2-399 NI-DAQ FRM for PC Compatibles
(AT-MIO-16F-5, AT-MIO-16X, AT-MIO-64F-5 only) If you want to use separate DMA
channels for each of the analog output channels, you have to set
ND_DATA_XFER_MODE_AO
to
ND_UP_TO_2_DMA_CHANNELS and ND_DATA_XFER_MODE_AI to ND_INTERRUPTS.
(AT-DIO-32F and AT-DIO-32HS) If you are performing high-speed digital input or output
for group 1, setting
ND_DATA_XFER_MODE_DIO_GR1 to ND_UP_TO_2_DMA_CHANNELS
makes both DMA channels available and can increase your performance. Use
ND_DATA_XFER_MODE_DIO_GR2
to achieve the same results for the AT-DIO-32HS.