User`s manual

Application Hints 51
PCIS-DASK
Analog Input
Trigger Mode Double-buffered Asynchronous Continuous
Analog Input
This section describes the function flow typical of trigger mode
double-buffered asynchronous analog input operation. A trigger is
an event that occurs based on a specified set of conditions. An
interrupt mode or DMA-mode Analog input operation can use a
trigger to determinate when acquisition stop. The trigger mode
data acquisition programming is almost the same as the non-trig-
ger mode asynchronous analog input programming. When using
PCIS-DASK to perform trigger mode data acquisition, the Sync-
Mode of continuous AI should be set to ASYNCH_OP. In addition,
double-buffered AI operation is enabled by setting Enable argu-
ment of AI_AsyncDblBufferMode function to 1. For more informa-
tion on double buffer mode, refer to section 5.2 for the details.