On Fri, 2012-03-23 at 17:24 +0100, Spyridon Tompros wrote: > Some additional info: > Do you have a proprietary board or an EASY50712 evaluation board? > We have both and on the EASY board we do not see any errors any more. On > the proprietary board we encounter some at high rates, that's why I > believe it is a matter of traces routing. > Eventually the USB I/F is the most high bit rate of all, therefore > routing of its differential signals must be done very carefully.
Proprietary board also. If you build the driver in debug mode I think it reports these error stats. The error reported for us, is Transaction Error (XactErr). Of all the errors this looks like a bit/data/crc type error. I intended to do an eye-diagram test, but it hasn't been done yet. As you say, high speed usb is the highest speed signal. I did turn on the option to operate at 12 Mbps. But after the fix, I didn't see much difference, and we need the higher speed for newest 3G modems. Conor _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
