I think you didn't understand what I was saying. I'm not saying the device will draw more power than your injector can handle. I am saying that turning the power on and off is a part of the protocol. And messing with this can break things.
Also the host (i.e. Nokia) may not allow a device to come on if it reports needing more than the host *thinks* it is capable of. Not sure about this. When I was reading the USB spec I was focussed on the electronics, not the software. If you can your hands on a copy of the USB spec, do so. Unfortunately that may be difficult. They want you to pay money to play in that game. -- Allen Brown http://brown.armoredpenguin.com/~abrown > I don't think the power should be an issue as Bluetooth adapters > shouldn't be much more demanding that other USB devices that people have > got working with the 770. I am using a circuit similar to this one, > http://www.hcilab.org/projects/nokia770/nokia770.htm. I will test my > circuit with other simpler USB devices with comparable power usage but I > think the problems will be more related to software than hardware. I > don't have much experience with drivers on Linux so that is the bit were > I am worried I might have overlooked something crucial. > > Cheers, > Dan > > Allen Brown wrote: >> This is tangential to what you are asking about, but I think you >> could run into a problem with your power injector. It's been a >> few years since I read the USB specs, but as I recall the host >> knows, and makes decisions based on, what power is available. >> Also it switches that power on and off depending on what state >> the "bus" is in. There could be problems if the actual power >> doesn't match what the host thinks it is. >> > _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
