[ECOS] USB Host support with ecos

[Jean Lee]

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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