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USB Host support with ecos

Hello,

I am new to this list and I am studying ecos.
I know that there is no standard support for the USB host function with ecos but I would like to know if someone already done it ?

I thought to a solution like adding an external USB host controller to the microcontroller which runs eCOS. I know that ATMEL has a chip called AT43USB380 which can be connected to a system processor through a parrallel interface (adress, data, ctrl). ATMEL provides a free software suite which is independant from the embedded OS and the system processor. This software suite includes the "standards USB class device drivers (ANSI C APIs)", "ANSI C compliant system interface APIs (to write the device driver)", and the "On-chip USB Firmware stack" which is embedded on the AT43USB380 for the low level USB protocol.

http://www.atmel.com/dyn/resources/prod_documents/doc3452.pdf

Well, I'm new in device driver writing and USB host..

Is it feasible to add the USB host functionality with this solution ?
If yes, how much time could it take to develop the device driver under ecos ?
Is there any other solution to add USB host to a processor running ecos ?

And last, If it is really unfeasible, does anybody knows an OS which supports USB host (I am only sure for Linux and WinCE but I don't want WinCE)?

Thank you very much for any advice and tips,

Jean Lee

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