Date: Wed, 7 Jan 2004 16:44:46 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: ticso@cicely.de, Bernd Walter <ticso@cicely12.cicely.de> Cc: Jay Cornwall <jay@evilrealms.net> Subject: Re: USB stack / configuration 0 Message-ID: <200401071644.47090.doconnor@gsoft.com.au> In-Reply-To: <20040107060538.GE45569@cicely12.cicely.de> References: <3FFA04A8.30601@evilrealms.net> <200401071605.15740.doconnor@gsoft.com.au> <20040107060538.GE45569@cicely12.cicely.de>
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On Wednesday 07 January 2004 16:35, Bernd Walter wrote: > > There are certainly situations where you want to reenumerate the USB > > devices, for example there are a number of devices which have no real > > firmware - they expect to be programmed by the PC then reset and > > reenumerated after being plugged in. > > Different story. Ahh well, I was hopeful :) > > I have such a device (M-Audio Mobile Pre USB) and I have modified USB > > audio code which works except that you need to manually reset the device > > without removing power (which is done by partially removing and then > > reinserting the USB connector). > > Bad device - it would have been so easy add an single transitor to do > this automaticaly. > Nevertheless USB_UNCONFIG_NO can't help you here. > What you need to do is toggling the hub port if the device is to > stupid to detach/reattach on his own. I don't think it IS a dumb device, there is a USB spec called DFU which covers it and the hosts job is to do the reenumeration. -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 9A8C 569F 685A D928 5140 AE4B 319B 41F4 5D17 FDD5
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