Date: Mon, 10 Jul 2000 11:54:31 +0900 (JST) From: Brian Handy <handy@isass0.solar.isas.ac.jp> To: freebsd-hardware@freebsd.org Subject: Serial I/O thruput Message-ID: <Pine.OSF.4.05.10007101143590.24754-100000@isass0.solar.isas.ac.jp>
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Hi folks, I asked some questions a while back about 'Space Hardware', and got a pile of really useful advice in short order. Heady with success, I thought I'd try this process again. This time it's more dumb questions though. I want to talk to three CCD cameras, and I'd like to download data from these cameras just about as fast as I can. The communications bus is TBD; it could be serial connections, parallel ports, heck, could even be USB maybe. (Or some other method I haven't been made aware of yet.) I had originally thought rather simplistically about using RS-232, since the board I'm looking at has (I think) 4 serial ports. However...I'm not sure how fast I can push data into the motherboard over these ports. I don't have any hardware yet (that's what the proposal is for), so I can't really benchmark anything. Is multiple serial ports (or a multi-port serial card) a silly idea for this? Any suggestions, and what sort of transfer rates I can expect? The only complicating factor is I have to talk to three cameras, each of which is [baseline] capable of generating 4MB of data every 10 seconds. I should probably know this stuff. Thanks, Brian -- Brian Handy Mail: handy@physics.montana.edu Department of Physics Phone: (406) 994-6317 Montana State University Fax: (406) 994-4452 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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