User`s guide

34 ? PCIS-DASK Application Hints

[Example Code Fragment]

card = Register_Card(PCI_7300A_RevB, card_number);

…

DO_7300B_Config (card, 16, TRIG_INT_PACER, P7300_WAIT_NO, P7300_TERM_ON, 0, 0x40004000);

//start pattern generation

DO_PGStart (card, out_buf, 10000, 5000000);

…

//stop pattern generation

DO_PGStop (card);

Release_Card(card);

4.4.5 Multiple-buffered Asynchronous Continuous Digital output programming Scheme

This section described the function flow typical of multi-buffered asynchronous digital output operation.

While performing continuous DO operation, the DO configuration function has to be called at the

beginning of your application. For asynchronous DO, the SyncMode argument in continuous DO

functions has to be set as ASYNCH_OP.

DI_xxxx_Config

(

xxxx means the card type,

e.g. DO_7300B_Config

)

DO_ContMultiBufferStart

DO_AsyncMultiBufferNextRead

Next half buffer

ready?

Yes

DO_ContMultiBufferSetup repeatedly…

Copy prepared data to the ready

buffer

Want to stop

the operation?

DO_AsyncClear

Yes

[Example Code Fragment]

card = Register_Card(PCI_7300A_RevB, card_number);

…

DO_7300B_Config (card, 16, TRIG_CLK_10MHZ, P7300_WAIT_NO, P7300_TERM_ON, 0, 0x00040004);

//setting the DMA buffers repeatedly

DO_ContMultiBufferSetup (card, out_buf, data_size, &BufferId);