On Thu, 18 Aug 2005 21:52:25 +0000 (UTC), Uwe Bonnes <[EMAIL PROTECTED]> wrote:
> > > However for mapping the interrupt mechanism available in the parport > > > framework to the USB layer I have no idea. In basic, the status register > > > of the SJA1000 needs to be polled at a high rate.1000 Hz would probably > > > do, like the time frame for non Full spped USB devices use. > > > Is that a typo? 1000 Hz _is_ the frame rate for full-speed USB. > > (High-speed USB uses microframes at 8000 Hz.) Hence a full-speed device > > with an interrupt endpoint whose period was 1 frame would be interrogated > > 1000 times per second. > > No, not a typo. Well, the "spped" was :-) > With every frame, I would like to send a USB command initiating a read of > the interrupt status register of the SJA1000 and read the data send from the > device with the read initiated in the frame before. > > But data to the FT2232 is transferred via bulk endpoints. No interrupt > endpoints are available with the FT2232. Just queue two URBs and voila. -- Pete ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
