| > You're still not getting it. I want the dock to power the tablet so it charges, the dock gets power from mains does not change that at all. Actually it's you who's missing the point. I've already told you that that does happen, it's just some handsets require a higher charge than others - and docks will only ever output the lowest required volts/amps because they wouldn't want to damage other hardware that is designed to pull less power. IIRC iPod/iPhone users had similar problems when Apple changed the input power rating for newer devices a few years ago. > You can't make this statement definitively. If one of the features of the dock is a keyboard, it's going to be acting as a HID interface device and will be acting in device mode.... lol How many music docks act as a keyboard? Plus there's a contingency for that in the spec anyway as you can run more than one USB interface concurrently over a single USB port. > This is wrong. A 'device' can never initiate a transfer, all transfers are negotiated by the 'host'. The 'host' is the bus master and manages all transfers regardless of what they are or where they are going. e.i. USB is a 'polling' interface, not a 'pushing' interface. You can not have more than 1 host on a USB bus. You're missing the point. It's just a software specification. Once the devices have linked, you can programmatically design the software to work whichever way you want. As I pointed out before, there's plenty of USB devices that behave this way already; devices that -from the user perspective- both initiate and receive data. |