User`s manual

Application Hints 49

PCIS-DASK

Analog Input

Trigger Mode Non-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.

AI_ContReadChannel/

AI_ContReadChannelToFile

AI_ContScanChannels/

AI_ContScanChannelsToFile

Sample multiple

continuous channels?

AI_AsyncDblBufferMode

NOYES

With SyncMode

= ASYNCH_OP

AI_AsyncCheck

Operation

complete?

AI_AsyncClear

YES

With Enable = TRUE

AI_XXXX_Config with

Trigger Mode enabled

(XXXX = card type)

With SyncMode

= ASYNCH_OP