User`s manual

Application Hints 47

PCIS-DASK

Analog Input

Non-Trigger Double-buffered Asynchronous Continuous

Analog Input

This section describes the function flow typical of non-trigger, dou-

ble-buffered asynchronous analog input operation. While perform-

ing continuous AI operation, the AI configuration function has to be

called at the beginning of your application. For asynchronous AI,

The SyncMode argument in continuous AI functions has to be set

to ASYNCH_OP. In addition, double-buffered AI operation is

enabled by setting Enable argument of AI_AsyncDblBufferMode

function to 1. For more information on double buffer mode, refer to

section 5.2.

AI_ContReadChannel/

AI_ContReadChannelToFile

AI_ContScanChannels/

AI_ContScanChannelsToFile

Sample multiple

continuous channels?

AI_AsyncDblBufferMode

NOYES

Next half buffer

ready for transfer?

AI_AsyncDblBuffer

Transfer

YES

With SyncMode

= ASYNCH_OP

AI_AsyncDblBuffer

HalfReady

Do you want to

stop the operation?

AI_AsyncClear

YES

With Enable = TRUE

AI_XXXX_Config

(XXXX = card type)

With SyncMode

= ASYNCH_OP