BuffaloEngineer
Member
Is there software available that would report the current supplied by a USB port? For example, I have a device hooked up to the port, and I want to know how much current is it currently drawing.
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No, It has no way of knowing exatly how much current is being used, you would need more hardware for that. But it does set USB ports to 200ma or 500ma.Figured the computer might already measures it internally anyway.
A new device will ask for 200 or 500 ma when its pluged in. Its part of the protocol.if it can't sense currents then how does it set USB ports to 200ma or 500ma?
Yes its called a fuse. Cheap and easy.There HAS to be a detect mechanism of some kind for over current, no if ands or buts.
Maybe hard wired into the port driver but not accessible thru software.Even if it's a low voltage dropout sense on the ports output line.