On Wed, 3 Dec 2003, Patrick Agrain wrote: > Hello everybody, > > I'm in charge of quite almost the same thing as Dimitris Lampridis and my > Linux skills are not well developped ( but I try to improve them ). > > Before coding on specific hardware, I wish to know more about the USB > driver architecture. > I think I have understood the meaning of the virtual root hub which is to > implement the "hub feature" on a Host Controler (?), but I still hang on > the bus problem. > Should a device share the same bus number than the Host Controler to talk > to each other ?
A device attached to the host controller should indeed have the same bus number as the host controller. > If this is the case, I suppose that Device and HC would have different > addresses on this bus ? Yes. HC's don't actually have device addresses but their virtual root hubs do. A root hub is always given device address 1, and any other device attached to the bus has a higher address. Alan Stern ------------------------------------------------------- This SF.net email is sponsored by OSDN's Audience Survey. Help shape OSDN's sites and tell us what you think. Take this five minute survey and you could win a $250 Gift Certificate. http://www.wrgsurveys.com/2003/osdntech03.php?site=8 _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
