Date: Wed, 6 Jul 2011 21:35:18 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: Renato Tambellini <rtsanch@gmail.com> Cc: freebsd-gnats-submit@freebsd.org, freebsd-usb@freebsd.org Subject: Re: usb/158650: uplcom USB To COM Device doesn't transmit data, only receive Message-ID: <201107062135.19031.hselasky@c2i.net> In-Reply-To: <CAKDHCroy_n3Mbm2R4hMrEBBcW_7ZV5Um1ztS2r8k7XMK-1ws4g@mail.gmail.com> References: <201107050037.p650bnQK060628@red.freebsd.org> <201107060859.58243.hselasky@c2i.net> <CAKDHCroy_n3Mbm2R4hMrEBBcW_7ZV5Um1ztS2r8k7XMK-1ws4g@mail.gmail.com>
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On Wednesday 06 July 2011 17:37:53 Renato Tambellini wrote: > Hi Hans, > > Follow the logs of my application and cu(1) trying to access my > another BSD machine. > > The files .dump are stdout of usbdump and .log are the logs of debug from > cons. > > In cu, I get the "login: " and a write error when I try to send the > chars to the remote console: > > # cu -l /dev/ttyU0 > Connected > ]Jj > > login: write: Device not configured > write: Device not configured > ... > > The kernel reconnects the device on error and the speed are set > correctly, 19200 for my app and 9600 to access the remote console from > cu. > Hi, What are the values of the following sysctls? sysctl hw.usb.ucom.cons_unit sysctl hw.usb.ucom.cons_baud Could you set: sysctl hw.usb.ucom.debug=15 Then type something on the cu terminal and see if you get something through. I have an uplcom adapter here and I cannot reproduce except if I do the following: cu -l /dev/cuaU0 Unplug uplcom. Then type something: cu -l /dev/cuaU0 Connected write: Device not configured write: Device not configured Then I need to "killall -KILL cu" to get back to normal. NOTE: If applications opening a USB TTY device does not close on error, then the USB stack will wait until that happens before it can enumerate more devices. This is a TTY stack problem. You can try to remove the force_short_xfer=1 flag in sys/dev/usb/serial/uplcom.c for the BULK TX transfer. I'm not sure if it helps. Really strange if your uplcom crashes on a ZLP! --HPShome | help
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