[rtl] DMA and RTLinux

["Edgar F. Hilton" <efh4v@virginia.edu>]

Has anybody has success using DMA transfers in RTLinux? 

If so, could you please send me the relevant snippet(s) from your code?

I am needing to transfer data to and from A/D and D/A cards from within
RTlinux. However, I am finding that each inw/inb/outb call has
(relatively speaking) a huge overhead with respect to the rest of my
code. So, I am trying to free up the CPU so that I will be able to
maintain high throughput.

Unfortunately, my DMA code does not seem to work, and I am trying to
figure out if it is my code, the cards, or the cards' documentation.

Any help in this matter will be greatly appreciated.

Thank you in advance,

-- Edgar
	-------------------------------------------------------
	Edgar F. Hilton
	Rotating Machinery and Controls Laboratory (ROMAC)
	office:	(804) 924-6233     fax: (804) 982-2246
	URL:    www.people.virginia.edu/~efh4v
	-------------------------------------------------------

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