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From: Jonathan Cameron <jic23-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>
To: "linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Realistic bandwidth to get through ehci controller on a dm3730?
Date: Thu, 14 Jul 2011 16:14:07 +0100	[thread overview]
Message-ID: <4E1F07BF.5090105@cam.ac.uk> (raw)

Hi All,

Just wondering if anyone had any figures for how much data one can expect
the omap3's usb controller to handle?

I'm trying to get a playstation eye (ov534) camera to run as at 60fps,
but gspca is giving me payload errors at 50fps or 60fps. (50*640*480 bytes
per sec, or about 122Mbits / sec (15MB / sec)

Quick and dirty tests of the beagle xm's network adapter suggest about
4MB/s so even at 40 fps when the camera is fine, I'm way above that.

Anyhow. Basically I'm trying to work out if I've run into a brick wall
or if it is worth more time to get this to work?

Thanks,

Jonathan
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             reply	other threads:[~2011-07-14 15:14 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-14 15:14 Jonathan Cameron [this message]
     [not found] ` <4E1F07BF.5090105-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>
2011-07-17 14:25   ` Realistic bandwidth to get through ehci controller on a dm3730? Ming Lei

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