maemo.org - Talk - View Single Post - N900 will not allow USB OTG!

	allnameswereout	2009-10-15 , 19:07
	Posts: 3,397 \| Thanked: 1,212 times \| Joined on Jul 2008 @ Netherlands	#439

Originally Posted by Hogwash

USB OTG is not the same as USB Host. USB OTG is an embedded spec that enables devices to have knowledge about certain other devices built into them. That way you can plug a camera directly into a printer and have them talk...without needing to have a PC in-between.

Even basic USB supports host (A-device) or peripheral (B-device) mode. It's a software issue. I don't understand why this basic functionality would be crippled...unless they only had time to fully test the B-mode software, and do not have A-mode coded yet. Maybe A-mode sucked to much power so they left it uncoded.

Can Quim speak to this?

qgil has already spoken... read the thread.

What you say is also already addressed. I've read the microUSB spec a bit (the revision). Not every device with microUSB supports A and B mode. For starters, the plug has to support both to support both A and B. Furthermore, the spec says it is not allowed to support both powering via microUSB as well as host mode. This is limited on hardware layer.

If you Nokia N900 wih USB host mode you're wanting something which will probably never be possible. Don't count on it. Change your priorities.

Can someone edit the first post with clarification linking to qgil's post. Or add that post in the first post. We're getting the same arguments based on misinformation over and over again.

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