[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-rt
Subject:    [rtl] DMA and RTLinux
From:       "Edgar F. Hilton" <efh4v () virginia ! edu>
Date:       1998-12-23 21:31:01
[Download RAW message or body]


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
	-------------------------------------------------------

--- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail majordomo@rtlinux.cs.nmt.edu OR
echo "unsubscribe rtl <Your_email>" | mail majordomo@rtlinux.cs.nmt.edu
----
For more information on Real-Time Linux see:
http://www.rtlinux.org/~rtlinux/

[prev in list] [next in list] [prev in thread] [next in thread]