Does NI VISA Support DMA ?

[eric931]

Does NI VISA Support DMA ?

if Yes,how to use it

Thanks

[rolfk]

VISA is a high level API that generally doesn't access hardware directly. For most of iit's interfaces DMA doesn't even come into play from the point of view of VISA (Serial, GPIB, TCP/IP, etc). The only exception to that might be the PCI register level access but DMA support there would be a real pain. Generally the only way to support something such as DMA in a useful way is to do it in a kernel driver directly. Anything else is more likely causing more trouble than you ever would want to encounter.