* Nikita V. Youshchenko <[EMAIL PROTECTED]> [070120 13:19]: > >> How can it charge over USB if it gets full discharged? > >> AFAIK, USB device is not powered by USB host until it is configured. > >> So gadged must be operational to charge over usb. > > > > Well, I'm almost certain that my USB mouse has no battery builtin, so > > I guess USB does provide some minimal power to enable configuration. > > Sure. > That depends on how usb client hardware is done. > In your mouse, there is microcontroller that controls usb client > functionality, and powers itself from usb (yes usb gives some limited > power - up to 100 mA if I remember correctly - even to client which is not > configured yet. > > But in case when USB is controlled by Linux USB Gadget driver, central CPU > must be operational and kernel up and running for USB client functionality > to work. That depends upon how clever the USB port hardware is, I'd guess.
> > Soft is Linux kernel in my case. > And yes, it can't charge over usb until it is up. I know, I've owned an iPaq with GPE once with that characteristic too ;) Andreas _______________________________________________ OpenMoko community mailing list [email protected] https://lists.openmoko.org/mailman/listinfo/community
