NI PCI-8430 RS232 with DMA

[FightOnSCTrojan]

One of the features of the NI’s RS-232 card is “High-speed DMA Interface minimizes CPU overhead”. When programming them with LabVIEW controllers, are there any special VIs to be used/techniques to be followed to activate/maximize the DMA capabilities of this card?  Or just because it’s a card with DMA feature, I am expected to see an instant boost in performance.

Your input will be appreciated,

Thanks,

Santiago

[FightOnSCTrojan]

Maybe it was posted at an inconvenient time. Here is another attempt to reach the LV gurus

thanks,

[Can_W]

Hey Santiago,
Sorry for the late reply, but to get back to your question, having the RS-232 board with DMA will optimize your system by itself. In LabVIEW you will have to allow access to DMA transfers, this can be done through a property node under General Settings. As for special coding methods, there really isn't anything that you need to follow to a tee, although there are certain practices that may help further optimize your code. All these can be seen in the example programs under Hardware Input and Output->Serial. I hope that this helps you out

Regards,