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Altera_Forum
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14 years ago

Point me in the right Direction - PCIe

Ok - Ive been staring at the PCIe Userguide for a couple of days - and I dont really know where to start with this thing. We have a design that requires the following setup: PC (currently windo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Some CPU have dma engines tightly coupled with the PCIe interface - this means that they can do a multi-word transaction. Since this typically takes just as long as a single word transaction it can make sense to spin the cpu waiting for the dma to finish (the interrupt entry/exit times would probably be longer that the cycle time).